WO2000068556A1 - Throttle device of internal combustion engine - Google Patents
Throttle device of internal combustion engine Download PDFInfo
- Publication number
- WO2000068556A1 WO2000068556A1 PCT/JP1999/002400 JP9902400W WO0068556A1 WO 2000068556 A1 WO2000068556 A1 WO 2000068556A1 JP 9902400 W JP9902400 W JP 9902400W WO 0068556 A1 WO0068556 A1 WO 0068556A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- throttle
- default
- throttle valve
- gear
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1065—Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0262—Arrangements; Control features; Details thereof having two or more levers on the throttle shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0269—Throttle closing springs; Acting of throttle closing springs on the throttle shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0277—Fail-safe mechanisms, e.g. with limp-home feature, to close throttle if actuator fails, or if control cable sticks or breaks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0298—Throttle control device with holding devices, i.e. to hold throttle in a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
- F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
Definitions
- the present invention relates to a throttle device for an internal combustion engine, and more particularly to an electronically controlled throttle device that drives an electric actuator based on a control signal to control opening and closing of a throttle valve.
- the fully closed position of the throttle valve does not mean a position that completely blocks the intake passage.
- the idle speed control using only the throttle valve without a bypass passage bypassing the throttle valve is provided.
- the throttle device to be used is defined separately for the mechanical fully closed position and the electrical fully closed position described below.
- the mechanical fully closed position is the minimum opening of the throttle valve specified by the The minimum opening is set at a position slightly open from the position where the intake passage is completely closed in order to prevent the throttle valve from seizing.
- the fully closed position is the minimum opening in the opening range used for control, and is slightly smaller than the mechanical fully closed position by the drive control of the electric actuator. Is set to a larger opening position (for example, a position approximately 1 ° larger than the mechanical fully closed position).
- the fully closed position (minimum opening for control) and the idle opening (opening required for idle speed control) do not always match. This is because the idle speed has a range due to the feedback control of the throttle valve opening based on the idle speed detection signal in order to maintain the target speed.
- the fully open position also has a mechanical fully open position defined by the stop and an electrical fully open position which is the maximum control opening.
- the fully closed position when simply referred to as the fully closed position, it includes the electrically fully closed position in addition to the mechanical fully closed position.
- the throttle valve In normal control, the throttle valve is controlled between the fully closed position (minimum control opening) and the fully open position (maximum control opening). In this way, a part of the throttle valve shaft is mechanically fully closed and fully open at the time of minimum and maximum opening control of the throttle valve! : Prevents mechanical fatigue, abrasion and damage of the toe and throttle parts without colliding with the toe. The toe can be prevented from galling.
- the default opening (that is, the initial opening when the engine is turned off) is based on the fully closed position described above (mechanically fully closed position and electrically fully closed position).
- the opening is also set to the position where the throttle valve is further opened (for example, a position 4 to 13 ° larger than the mechanical fully closed position).
- the default opening is to secure the self-propelled (limb home) or to secure the intake air flow rate to prevent the engine from stalling. It responds to requirements such as preventing sticking to the inner wall of the throttle body.
- the default lever is rotated together with the throttle valve shaft from the default opening position to the throttle valve fully open position, and the default lever is defaulted when the engine key switch is off.
- the throttle valve is kept at the default opening by bringing it into contact with the collar and the throttle valve is set to the default opening or less, the engagement between the throttle valve shaft and the default lever is released.
- the throttle valve shaft is piled up by the force of the spring in the closing direction and rotated independently.
- the other is to rotate the default lever and throttle valve shaft together from the fully closed position of the throttle valve to the default opening position, and contact the default lever with the default stop when the engine switch is off.
- the throttle valve opening is maintained at the default opening and the throttle valve is set to the default opening or more, the engagement between the throttle valve shaft and the default lever is released and the throttle valve shaft is released.
- An object of the present invention is to solve the above-mentioned problems, to reduce the size and weight of a throttle device having an electric actuator, a gear mechanism, a default opening setting mechanism, etc., to rationalize the manufacturing and adjustment work, and to stabilize the operation. The purpose is to improve the performance and accuracy. Disclosure of the invention
- the present invention is basically configured as follows.
- a throttle device for driving a throttle valve for controlling an intake air flow rate of an internal combustion engine to be opened and closed by an electric actuator, wherein the power of the electric actuator is provided on one surface of a side wall of the throttle body.
- the installation space for the reduction gear mechanism is covered by a gear cover that covers most of the installation space instead of the gear case and the gear cover provided on the side wall of the conventional throttle pod.
- the gear cover plays the role of a gear case. Therefore, the throttle body itself does not need to be integrally molded with a relatively large-volume gear case as in the past. Since the gear cover is made of a synthetic resin, it is possible to reduce the size and weight of the metal throttle pod generally formed by die-casting.
- a second invention is a throttle device for opening and closing a throttle valve for controlling an intake air flow rate of an internal combustion engine by an electric actuator, wherein an opening degree of the throttle valve when the electric actuator is de-energized.
- a throttle device for an internal combustion engine having a default opening setting mechanism for maintaining the opening at a predetermined opening (default opening) larger than the fully closed position,
- the stopper for defining the default opening and the stopper for defining the mechanically fully closed position of the throttle valve are constituted by an adjust screw, and these stoppers are formed from the same direction. It is characterized by being arranged side by side so that the position can be adjusted.
- the default opening degree and the mechanical fully closed position of the throttle valve can be arbitrarily adjusted.
- the adjustable screw of the default opening stopper (default stopper) and the adjustable screw of the fully closed stopper are arranged side by side in the throttle body so that the position can be adjusted from the same direction. (Screw) screw holes can be drilled from the same direction, and the position of the screw can be adjusted from the same direction at a close position. Can be achieved.
- a third invention is an application of the first and second inventions, wherein the fully closed stopper receives a reduction gear (final gear) fixed to a throttle valve shaft.
- a mechanically fully closed position is defined, and a default stop is provided with an engagement element for setting a default opening (the engagement element is freely fitted to the throttle valve shaft so as to be rotatable on the shaft, and is provided with a spring).
- the throttle body On one surface of the side wall of the throttle body, there is a space for installing a reduction gear that transmits the power of the electric actuator to the throttle valve shaft, and a frame for attaching a gear cover formed so as to border around the installation space for this reduction gear.
- the height of the frame is reduced so that the height of the frame is lower than the mounting height of the final gear, and the projection for mounting the fully closed shaft at a position covered by the gear cover is formed by the frame.
- the projection is provided with the fully-closed stopper in accordance with the mounting height of the final-stage gear of the reduction gear.
- the default stopper is located at a position lower than the frame. It is characterized by being arranged alongside the fully-closed stopper in accordance with the position of an engagement element (default lever) for setting a default opening.
- the installation space for the reduction gear mechanism is covered almost entirely by the gear cover as in the first invention, and the metal throttle pod is reduced in size by that much to reduce the weight. Will be possible.
- the final gear of the reduction gear protrudes from the gear bar mounting frame on the side wall of the throttle body. Even if the gear is provided, the final gear cannot be received. Therefore, in the present invention, a protrusion for mounting a fully-closed tongue for receiving the final gear is set, and this protrusion is provided beyond the height of the frame, and the fully-closed tongue is attached to this protrusion. It was arranged according to the mounting height of the final gear.
- a fourth invention provides a throttle device for an internal combustion engine having the default opening setting mechanism
- the engagement element (default lever) of the default opening setting mechanism that can be engaged with the last-stage gear is rotatable relative to the throttle valve shaft, and
- a return spring for biasing the throttle valve in a closing direction is disposed around the bearing boss, and one end of the return spring is locked to the default lever, and the default lever and the final gear are connected.
- a spring (default spring) for pulling the default lever gear in a direction to engage with each other is arranged between the lever and the default lever.
- the last-stage gear has a boss through which the throttle valve shaft passes only on the side (one side) receiving the default spring.
- the lever is also formed with a throttle valve passage passage facing the boss of the final gear, and the default spring is mounted around both bosses.
- the return spring and the default spring can be arranged by utilizing the space that is inevitably generated around each boss, so that the space can be rationalized and the speed reduction gear can be arranged.
- All the bosses of the last stage gear are concentrated and protruded on one side, so the amount of projection of the boss protruding from one side of the last stage gear (boss axis length) is set to the double-sided position Type) can be secured longer than the protrusion of the boss on one side. Therefore, it is possible to secure a space for mounting the spring of the default opening setting mechanism without wasting while keeping the device compact.
- a fifth invention provides a throttle device for an internal combustion engine having the default opening setting mechanism
- a final gear of a deceleration gear for transmitting the power of the electric actuator is fixed, and an engaging element (default lever) of the default opening setting mechanism is connected to the throttle valve shaft. Relatively rotatably fitted,
- a spring (default spring) for setting the default lever and the default gear is disposed between the default lever and the last gear so that the default lever and the final gear can be engaged with each other.
- the spring is connected to the default lever and the last gear.
- a spring receiving structure that directly receives the spring.
- the default lever proposes a configuration in which at least a portion constituting a boss and a portion receiving the default spring are formed of synthetic resin.
- the synthetic resin has a smaller coefficient of friction than the metal member, even if the default spring twists due to the relative rotation between the default lever and the final gear, the default spring and the contact with the default spring The friction between the parts (spring receiving part and boss part in the default lever) is reduced to reduce the load on the motor. Therefore, the movement of the throttle valve by the motor can be made smooth, and the power consumption of the motor during operation can be reduced.
- the surfaces of the return spring and the default spring are coated to reduce the coefficient of friction, the friction between the return spring and the default spring and the mating member generated during the twisting operation of these springs can be further reduced. it can.
- a sixth invention provides a throttle device for an internal combustion engine having the default opening setting mechanism
- An engagement element (default lever) for setting a default opening degree is fitted to one end of the throttle valve shaft so as to be rotatable relative to the throttle valve shaft, A return spring that urges the throttle valve in the closing direction with the engagement element interposed therebetween, and a default opening that urges the spring force to the default opening side when viewed from the fully closed position of the throttle valve.
- a spring for setting the degree is disposed facing the throttle valve axial direction, and these springs are formed by coil-shaped torsion springs. Both surfaces of the engaging element are the return springs.
- a spring support for a spring for setting the default opening which locks one end of these springs, and both springs have different coil diameters and are mounted by being compressed in the axial direction, resulting in a larger coil diameter
- the compression stress F of the other spring is larger than the compression stress f of the spring with the smaller coil diameter.
- the compressive stress is the repulsive force of the spring generated when the spring is compressed.
- the default opening is set. Since it is necessary to release the engagement with the engagement element for rotation and rotate independently, the engagement element for setting the default opening restricts the throttle so that it can rotate relative to the throttle valve shaft. Mounted on the valve shaft in a "clear-fit" condition. ;
- the engagement element for setting the default opening swings (displaces) due to vibration or the like in an unstable state.
- the engagement element for setting the default opening swings (displaces) due to vibration or the like in an unstable state.
- the engagement element for setting the default opening is Even when the springs are held by the spring compression force of the default spring and the default spring, if the compressive stresses of both springs are equal and the balance of both springs is not good, the mechanism for setting the default opening degree is required.
- the engagement element is in an unstable state in which the engagement element is likely to oscillate, so that the default opening is not correct and the above-mentioned engagement element cannot be expected to operate smoothly.
- the compression stress F of the spring having the larger coil diameter of the return spring and the default spring is larger than the compression stress f of the spring having the smaller coil diameter. Enlarge.
- the compressive stress F of the larger coil diameter overcomes f and presses the above-mentioned engagement element at a position close to the outer diameter in a stable state in one direction, so that the engagement for setting the default opening degree is performed.
- the proper state can be maintained by preventing the displacement of the element, and the above-mentioned problems can be prevented.
- a reduction gear for transmitting the power of the electric actuator to a throttle valve shaft, and a final stage gear of the reduction gear is press-fitted to one end of the throttle valve shaft protruding from a side wall surface of a throttle body.
- the final stage gear of the press-fitting fixed type is configured to be able to be brought into contact with the shaft which defines the mechanically fully closed position of the throttle valve by driving an electric actuator. I do.
- the final gear of the reduction gear also serves as a movable-side regulating element that regulates the mechanical fully-closed position, and this regulating element (final-stage gear) is press-fitted into the throttle valve shaft. Since the gear is fixed, the reduction gear is fully closed. The position of the deceleration gear with respect to the throttle valve shaft can always maintain a constant relationship even when an impact is applied by contact with the topper. Therefore, the opening degree of the throttle valve determined based on the mechanical fully closed position does not change, which contributes to maintaining control accuracy.
- An eighth invention is directed to a throttle device for opening and closing a throttle valve for controlling an intake air flow rate of an internal combustion engine by an electric actuator, wherein a motor used for the electric actuator is a yoke constituting a motor housing. Two flat opposed surfaces are formed, and a motor case for accommodating the motor has flat opposed inner surfaces conforming to the shape of the motor housing, and a throttle valve shaft on a side wall of the throttle body.
- the motor case is arranged so as to intersect with the perpendicular line, and all or most of one of the opposed flat inner surfaces of this motor case is located downstream of the idle opening position for controlling the throttle valve. (For example, on the downstream side of the electrically closed position for controlling the throttle valve) is characterized in that it constitutes the outer wall surface of the intake passage.
- the flattening of the motor housing and, consequently, the motor case can contribute to the reduction of the size and weight of the throttle body, and one of the flat inner surfaces of the motor case is required to control the re-valve. Because the outer wall of the intake passage downstream of the idle opening position is formed, the motor case can be rotated even when the intake air flow rate is low, such as during idle rotation. The most efficient cooling effect is caused by the adiabatic expansion of the intake air flow generated immediately downstream of the throttle valve. I Therefore, the cooling inside the motor case and, consequently, the heat dissipation of the motor housing can be enhanced, contributing to the motor cooling effect.
- the motor case accommodating the motor has a flat opposing inner surface adapted to the shape of the motor housing, and intersects a line orthogonal to the throttle valve axis with the side wall of the throttle body.
- the motor case is characterized in that one of the opposed flat inner surfaces of the motor case is formed so as to be recessed from the outer wall surface of the surrounding intake passage.
- the thickness of the wall adjacent to the intake passage in the motor case is reduced to make the inner surface of the motor case closer to the intake passage side, so that the cooling action by the intake air passing through the intake passage is efficiently performed. It becomes possible to receive well.
- FIG. 1 is a perspective view schematically showing the power transmission of a throttle valve and a default mechanism of an electronically controlled throttle device according to one embodiment of the present invention
- FIG. 2 is an electronically controlled throttle device of FIG.
- FIG. 3 is a diagram illustrating the principle of the operation equivalent to the above
- FIG. 3 is a cross-sectional view of the electronic control throttle device according to the above-described embodiment taken perpendicular to the axial direction of the intake passage
- FIG. Fig. 5 shows the throttle device with the gear cover with the throttle sensor removed and the same cross-sectional position as in Fig. 3
- Fig. 5 is a cross-sectional view of the throttle device in Fig. 3 in the axial direction of the intake passage
- FIG. 6 Is a perspective view of the above throttle device
- FIG. The figure is a perspective view of the throttle device with the gear cover removed
- FIG. 8 is a perspective view of the throttle device with different angles
- FIG. 9 is a perspective view of the throttle device with different angles.
- Fig. 10, Fig. 10 is a top view of the above-mentioned throttle device
- Fig. 11 is a diagram of the above-mentioned throttle device where the gear installation part is removed from the gear cover
- Fig. 12 is a fully closed throttle.
- (A) is a view partially showing FIG. 11 viewed from the direction A
- (b) is a cross-sectional view taken along the line B-B of (a)
- FIG. 13 is a view showing the positional relationship between the intake passage of the above-mentioned throttle device and the motor case, taken along line BB of FIG. 6, and
- FIG. 14 is a view showing the motor of FIG.
- FIG. 15 is an exploded perspective view of the throttle device according to the above embodiment, with the motor removed from the case.
- FIG. 16 is an exploded perspective view showing a part of FIG. 15 in an enlarged manner
- FIG. 17 is an exploded perspective view showing the parts of FIG. 16 in a different way
- FIG. FIG. 19 is a perspective view of the inside of the gear cover used in the embodiment
- FIG. 19 is an exploded perspective view of the throttle sensor provided inside the gear cover
- FIG. 20 is a view of the throttle sensor of FIG. FIG.
- FIG. 21 is an exploded perspective view
- FIG. 21 is a longitudinal sectional view of the gear cover
- FIG. 22 is a plan view of the gear force bar viewed from the inside
- FIG. 2'3 is a terminal that is a part of the gear cover.
- FIG. 24 is a plan view of the fixing plate
- FIG. 24 is a perspective view of the terminal fixing plate
- FIG. 25 is a perspective view showing the terminal fixing plate in a different direction
- FIG. The figure is a perspective view of the terminal (wiring) fixed to the resin mold of the fixing plate.
- FIG. 28 is an explanatory diagram of the operation of the throttle sensor used in the embodiment.
- FIG. 28 is an explanatory diagram of the operation of the throttle sensor used in the embodiment.
- FIG. 1 is a perspective view schematically showing a power transmission and a default mechanism of a throttle valve in the present embodiment
- FIG. 2 is a principle explanatory view equivalently showing the operation thereof.
- the amount of air flowing in the intake passage 1 in the direction of the arrow is adjusted according to the opening degree of the disk-shaped throttle valve (throttle valve) 2.
- the throttle valve 2 is fixed to the throttle valve shaft 3 by screwing.
- a final stage gear (hereinafter referred to as a throttle gear) 43 of a reduction gear mechanism 4 for transmitting the power of a motor (electric actuator) 5 to the throttle valve shaft 3 is attached. I have.
- the gear mechanism 4 includes a pinion gear 41 attached to the motor 5 and an intermediate gear 42 in addition to the throttle gear 43.
- the intermediate gear 42 is composed of a large-diameter gear 42a that engages with the pinion gear 41 and a small-diameter gear 42b that engages with the throttle gear 43, and the wall of the throttle body 100 It is rotatably fitted to a gear shaft 70 (see Fig. 3) fixed to the shaft.
- the motor 5 is driven according to an accelerator signal or a traction control signal relating to the amount of depression of the accelerator pedal, and the power of the motor 5 is transmitted to the throttle valve shaft 3 via the gears 41, 42 and 43.
- the throttle gear 43 is a sector gear fixed to the throttle valve shaft 3 and has an engagement side 43 a for engaging with a projection 62 of a default lever 6 described below.
- the default lever 6 is used for a default opening setting mechanism (an engagement element for setting a default opening), and is fitted to the throttle valve shaft 3 so as to be rotatable relative to the throttle valve shaft. are doing.
- the throttle gear 4 3 and the default lever 6 have one end 8 a of a spring 8 (hereinafter sometimes referred to as a default spring) locked to a spring locking portion 6 d of the default lever 6 and the other end 8 b Are locked to the spring locking portion 43b provided on the throttle gear 43, and the projection 62 on the default lever 6 and the engagement side 43 on the throttle gear 43 via the default spring 8. Are biased to attract (engage) each other in the rotational direction.
- the default spring 8 when viewed from the fully closed position of the throttle valve, urges the throttle valve shaft 3 and thus the throttle valve 2 in the default opening direction. '
- the free end 7 b is locked to the spring locking portion (projection) 6 1 provided on the default lever 6, and the default lever 1 and throttling gears 4 and 3 engaging with it, and thus the throttle valve shaft 3 are urged in the throttle valve closing direction.
- the protrusions of the projections 61, 62 of the default lever 6 and the spring locking portions 43b provided on the throttle gear 43 are exaggerated for the convenience of drawing the drawings. Since the springs 7 and 8 are used in a compressed state, the spring length in the axial direction becomes shorter, the springs 7 and 8 are formed by corresponding short protrusions (see exploded views in Figs. 16 and 17) . Further, in FIG. 1, the spring locking portion 43b is provided at one end of the throttle gear 43 opposite to the tooth side for easy viewing, but in actuality, as shown in FIG. It is provided so as to be hidden inside (the back side) of the tor gear 43. Fig.
- FIG. 1 also schematically shows the locking structure of one end 7b of the return spring 7 and the locking structure of one end 8a of the default spring 8, but in actuality, Fig. 17 and Fig. 16 It has become like. The details of the mounting structure of the return spring 7 and the default spring 8 will be described later.
- the fully closed stop 1 and 2 is used to define the mechanically fully closed position of the throttle valve 2.
- the throttle valve shaft 3 One end of the fixed stopper engaging element (here, the throttle gear 43 also serves) stops against the stopper 12 to prevent the throttle valve 2 from closing any further.
- the throttle for setting the default opening (sometimes referred to as the default stopper) 1 1 mechanically closes the opening of the throttle valve 2 when the engine key is turned off (when the electric actuator 5 is off). Position and electrically closed position (control This is to keep the initial opening (default opening) larger than the minimum opening.
- the spring locking portion 61 provided on the default lever 6 comes into contact with the default stopper 11 when the throttle valve 2 is at the default opening, and the opening of the default lever 6 is further reduced in the direction ( It also functions as a stop contact element that prevents rotation in the closing direction.
- the fully closed stop 12 and the default stop 11 are composed of adjustable screws (adjustment screws) provided in the throttle body 100, and in fact, as shown in FIGS. They are arranged in parallel or almost parallel at a position close to, so that the position can be adjusted from the same direction.
- the throttle gear 4 3 and the default lever 6 can be engaged and rotated together against the return spring 7 in the opening range equal to or larger than the default opening by attracting in the rotational direction via the spring 8 [2nd. Also, in the opening range below the default opening, the default lever 16 is prevented from moving by the default stopper 11, and only the throttle gear 43 is moved together with the throttle valve shaft 3. It is set to be rotatable by staking the force of the default spring 8 (see Fig. 2 (a)).
- the default lever 6 When the engine key is off, the default lever 6 has been pushed back by the force of the return spring 7 to a position where it comes into contact with the default lever 11, and the throttle gear 4 3 has the projection 6 2 of the default lever 6.
- the throttle valve 2 is at a position corresponding to the default opening by receiving the force of the return spring 7 through the valve (see FIG. 2 (b)). In this state, the slot The throttle gear (stop ring stopper element) 43 and the fully closed stop ring 12 maintain a predetermined distance.
- the throttle valve shaft 3 When the throttle valve shaft 3 is powered by the motor 5 below the default opening (for example, from the default opening to the control fully closed position), only the throttle gear 43 and the throttle valve shaft 3 are deformed. It disengages from Trevor 6 and operates by staking with the force of the default spring 8.
- the fully closed stop 12 that defines the mechanical fully closed position of the throttle valve drives the motor 5 to contact the throttle gear 43 only when the control reference point is known. Under normal electric control, the throttle gear 43 does not abut the fully closed stopper 12.
- the spring force of the return spring 7 is effective only when the default stopper 11 is located above the default opening. Since the spring force of the default spring 8 can be set without being affected by the influence, the load on the default spring can be reduced, and the torque required for the electric actuator can be reduced, and the electric load on the engine can be reduced. .
- the return spring 7 and the default spring 8 are coil-shaped torsion springs, and the diameter of the return spring 7 is larger than the diameter of the default spring 8. It is held by a shaft rotation and is arranged between the throttle gear 43 and the wall of the throttle body 100.
- the return spring 7 and the default spring 8 are opposed to each other in the axial direction of the throttle valve so as to sandwich the default lever 6, and are actually mounted by being compressed in the axial direction as shown in FIGS. Both surfaces of the default spring 8 serve as spring supports for the return spring 7 and the default spring 8, and lock one end 7b, 8a of these springs, and use the spring with the larger coil diameter (here, the return spring 7).
- the compression stress F is larger than the compression stress f of the spring with the smaller coil diameter (here, the default spring 8).
- the default lever 6 Since the default lever 6 is free from the throttle valve shaft 3, that is, “clearance fit”, the default lever 6 is located at the fitting portion (between the outer circumference of the throttle valve shaft 3 and the inner circumference of the default lever 6). Has a gap. Therefore, the default lever 6 is sandwiched between the return spring 7 and the default spring 8. However, if the compressive stress of both is the same, or if the coil diameter of either spring is reduced and pressed near the center of the default lever 6, the default lever 6 lacks stability, and The default lever 6 may be installed at an angle.
- the diameter of the return spring 7 is set to be large enough to be applied to the flange 6 b forming the outer diameter of the default lever 6, and the compressive stress F is reduced by the default spring 8. This is sufficiently larger than the compressive stress f. In this way, the compressive stress F of the return spring 7 acts near the outer periphery of the default lever 6 (closer to the outer diameter), and the default lever 6 is moved in one direction (here, the throttle gear 4 3) due to the relationship of F> f. Side), it is possible to attach the default lever 6 in a stable state (without tilt), ensuring smooth operation of the default lever and accuracy of setting the default opening.
- FIG. 3 is a cross-sectional view of the electronically controlled throttle device according to the present embodiment, taken perpendicular to the axial direction of the intake passage 1.
- FIG. 4 is a diagram of the electronically controlled throttle device of FIG. 3 with a gear cover with a throttle sensor.
- Fig. 5 shows the electronic control throttle device of Fig. 3 in the axial direction of the intake passage 1
- Fig. 6 shows the electronic control throttle device of this embodiment.
- FIG. Fig. 7 is a perspective view of the electronic control throttle device with the gear cover removed
- Figs. 8 and 9 are perspective views of the electronic control throttle device at different angles
- Fig. 10 is a top view of the electronic control throttle device.
- Fig. 1 is a cross-sectional view of the electronically controlled throttle device according to the present embodiment, taken perpendicular to the axial direction of the intake passage 1.
- FIG. 4 is a diagram of the electronically controlled throttle device of FIG. 3 with a gear cover with a throttle sensor.
- Fig. 5 shows the electronic
- FIG. 11 is a view of the gear installation part of the electronically controlled throttle device with the gear cover removed and viewed from the outside.
- Fig. 12 is an explanatory view showing the installation state of the fully closed stopper and the default stopper.
- Fig. 13 shows the intake passage of the electronically controlled throttle device according to this embodiment.
- FIG. 6 is a cross-sectional view of the positional relationship between the motor case 1 and the motor case 110 taken along the line C--C of FIG. 6,
- FIG. 14 is a cross-sectional view of the motor case 110 with the motor removed, and
- FIG. 1 is an exploded perspective view of the electronically controlled throttle device according to the present embodiment.
- FIG. 6 and 17 are exploded perspective views showing a part of FIG. 15 in an enlarged manner.
- a gear installation space 102 for accommodating the gear mechanism 4 is formed on one side wall of the throttle body 100, and a part 10 of this gear installation space 102 is formed.
- a bearing post 101 for accommodating one bearing 20 of the throttle valve shaft 3 is provided in the recess 106 so that the recess 6 is deeply recessed.
- the bearing 20 is sealed by a seal member 18 supported by a seal holder 19.
- the return spring 7 is coiled and twisted. Most of the return spring 7 is disposed around the bearing post (annular recess 106), and one end (fixed end) 7a is bent outward to form a side wall of the throttle body. It locks in the spring locking part 100a (see Fig.1, Fig.3, Fig.9, Fig.11) provided in the recessed part 106, and the other end 7b is bent outward to default. Projection 6 1 provided on lever 6 (Fig. 17 ), The spring force in the throttle valve closing direction is applied to the default lever 6.
- one end 7 b of the return spring 7 is provided with a locking hole 61 a in the projection 61 of the default lever 6 as shown in FIG. Locking 7b prevents it from coming off.
- the throttle gear 43 has a boss 43 for inserting the throttle valve shaft only on one side receiving one end of the default spring 8.
- a boss 6 f is formed on the default lever 6 so as to pass through the throttle valve shaft so as to face the boss 4 3 c, and a default spring is formed around the two bosses 4 3 c and 6 f. 8 are arranged.
- the default spring 8 of this example also has a coil-shaped twist, and one end 8a is bent to the inner diameter side as shown in FIG. 16 so as to engage with the groove 6d provided in the boss 6f of the default lever 6.
- the other end 8b is bent toward the outer diameter side and is locked to a locking projection 43b provided inside the throttle gear 43 as shown in FIG.
- At least one surface of the throttle valve shaft through-hole 43d provided on the boss 43c of the throttle gear 43 has at least one plane, and here a square hole having two parallel planes or a shape similar thereto. None, one end 3a of the throttle valve shaft 3 has a cross section similar to the shape of the throttle valve shaft hole 4 3d, and the throttle gear 43 is fixed to one end of the throttle valve shaft 3 by press-fitting. .
- the default lever 6 is a dish-shaped tree made of reinforced plastic. It consists of a resin portion 6a and a metal flange portion 6b provided on the periphery thereof (FIGS. 3 to 5, FIG. 16, FIG. 17). The resin part 6a and the flange part 6b are integrated by embedding it on the outer periphery of the resin part 6a by molding of a, and the protrusions 6 1 and 6 2 are formed by processing the flange part 6b. Provided. All of the default levers 6 may be formed of resin or metal plate.
- the compressive stress F of the return spring 7 is received by the flange 6 b of the default lever 6.
- the resin portion 6a forms a boss 6f around the hole 6e through which the throttle valve shaft passes, and an annular ring into which one end of the default spring 8 is fitted around the boss 6mm.
- a groove 6C is formed, and the bottom surface of the groove 6C receives the compressive stress f of the default spring 8, and has a relationship of F> f as described above.
- a male screw is formed at one end of the throttle valve shaft 3, and after attaching the default lever 6, the default spring 8, and the throttle gear 43, the nut 17 is tightened via the spring washer 16.
- the return spring 7 and the default spring 8 having a relationship of compressive stress F> f are compressed by the press-fit of the throttle gear 43.
- the throttle gear 43 may be fixed by tightening the nut 17 instead of press-fitting. In this case, the return spring 7 and the default The spring 8 is compressed.
- the return spring 7 and the default spring 8 are provided with a coating that reduces the coefficient of friction to reduce friction, for example, tetrafluoroethylene resin.
- the main purpose of this coating is to reduce friction with the counterpart (the part that receives the springs 7 and 8 and the part where the spring comes into contact during the torsional operation, such as the boss), making the throttle valve movement by the motor smooth. And to reduce motor power consumption during operation.
- the gear installation space 102 provided on the entire side wall of the throttle body 100 has an outline 104 formed integrally with the throttle body 100, and this outline 104 is used for mounting the gear cover. Frame.
- the height H of the frame 104 is determined based on the bottom surface of the gear installation space 102 as shown in Fig. 4, the height H of the reduction gear mechanism 4 should be lower than the height h. The height has been reduced.
- the gear cover 103 can cover the reduction gear mechanism 4.
- a gear case having an enclosing wall that is higher than the mounting height of the gear mechanism is not provided on the side wall of the throttle body, and the portion without the enclosing wall of the gear case is synthesized.
- the gear cover 103 made of resin is supplemented.
- the metal throttle body 100 formed by die-casting can be reduced in size and weight.
- the height of the pinion 41, the intermediate gear 42a, and the throttle gear 43 of the reduction gear 4 is made higher than the frame 104 by reducing the height of the gear cover mounting frame 104. I have. Therefore, since the throttle gear 43 protrudes from the frame 104, the throttle gear 43 cannot be received even if the fully closed stopper 12 is provided on this frame.
- a protrusion 102a for mounting the fully closed stopper 12 at a position covered by the gear cover 103 is set integrally with the throttle body, and the height of the protrusion 102a is adjusted to the height of the frame 104.
- the projection 102 was provided with the fully closed stop 12 in accordance with the mounting height of the throttle gear 43.
- the default stopper 11 makes a hole 100c in the side wall of the throttle body 100 as shown in FIG. It is arranged so as to be parallel to (including substantially parallel to) the fully closed stopper 12 through c.
- the motor 5 used in the electric actuator has two flat surfaces 51 a and 51 b formed on a yoke 51 constituting a motor housing.
- the motor case 110 that houses the motor has flat opposed inner surfaces 110a and 110b that match the shape of the motor housing, and has a slot.
- the side wall of the torque body 100 is orthogonal to the throttle valve shaft 3. It is arranged to intersect the line.
- the axial direction of the motor case 110 faces in the same direction as the throttle valve shaft 3.
- the motor case 110 integrated with the throttle body 100 is also flattened, and the throttle body 110 is flattened.
- all or most of one or more inner faces 110b of the opposed flat inner faces (planes) of the motor case 110 are throttle valves.
- the outer wall surface of the intake passage 1 on the downstream side of the idle opening position in the control of 3 is configured.
- all or most of the flat inner surface 110b constitutes the outer wall surface of the intake passage on the downstream side of the electrically closed position for controlling the throttle valve.
- the flat inner surface 11 Ob is formed so as to be depressed from the outer wall surface of the surrounding intake passage, and thus, as shown in FIG. 14, the motor case 110 is adjacent to the intake passage 1. The thickness of the wall on the 110b side is reduced to make the inner surface 110b of the motor case closer to the intake passage side.
- the motor insertion port 110a of the motor case 110 is opened so as to face the gear installation space 102, and as shown in Fig. 11, the motor bracket 5a has three screws 5b that are arranged at three points.
- the motor 5 is fixed by being screwed at a position around the motor insertion port 110c.
- a motor positioning line conforming to the contour of the motor bracket 5a is formed.
- the power terminal (motor terminal) 51 of the motor 5 is led through the motor bracket 5a into the space covered by the gear cover 103 (Figs. 7 and 8), and is provided on the gear cover 10.
- Terminals 80a and 80b are connected via connection fittings 82.
- the default opening setting mechanism (default lever 6, default spring 8, stopper 11, etc.)
- the throttle sensor 300 is arranged collectively on one side of the side wall of the throttle body 100.
- the throttle sensor 30 detects the throttle valve opening (throttle position).
- the throttle sensor element is built in the gear cover 103 so as to be covered by the sensor cover 31.
- One end 3a of the throttle valve shaft 3 is extended to reach the position of the rotor (rotor) 32 of the throttle sensor 30 when the gear cover 103 is mounted, and the gear cover 103 is connected to the throttle body 100.
- the gear cover 103 is connected to the throttle body 100.
- Fig. 18 is a perspective view of the inside of the gear cover 103
- Fig. 19 is an exploded perspective view of the throttle sensor 30 built into the gear force part 103
- Fig. 20 is the viewing direction.
- Fig. 21 is a longitudinal sectional view of the gear cover 103
- Fig. 21 is a plan view of the gear cover 103 viewed from the inside
- Fig. 23 is a part of the gear cover 103.
- FIG. 24 is a perspective view of a terminal fixing plate 103-2
- FIG. 25 is a perspective view showing the terminal in a different direction
- FIG. Figure 6 is a perspective view of the terminal (wiring).
- the gear cover 103 that covers the installation space 102 of the reduction gear mechanism 4 is molded from synthetic resin, and is integrally molded with the connector case 103 b for connection to external power and signal lines. Have been.
- the throttle sensor 30 employs a potentiometer method. As shown in the exploded perspective views of FIGS. 19 and 20, resistors 39 and 39 'are formed on one surface and their terminals 61 , 6 1, a rotor 3 2 having a sliding brush 33 in contact with the resistance wire 39 and the sliding brush 3 3 ′ in contact with the resistance wire 39 ′, and a circumferential direction. It has a metal wave washer (which forms a re-rotor presser spring) 34 that repeats corrugations and a sensor cover (plate) 31 made of synthetic resin.
- the resistance 39 and the sliding brush 33 constitute one throttle sensor, and the resistance 39 and the sliding brush 33 'constitute another throttle sensor.
- the sliding brushes 33, 33 fit into the small protrusions 32b on the rotor 32, and crush the small protrusions 32b by heat, and take up the rotor 32. Attached.
- the board 35 is bonded to the inner bottom 103 a of the throttle sensor housing space (circular recess) 103 a formed on the inner surface of the gear cover 103.
- a rotor shaft support hole 103 c that is fitted with a projection (rotary shaft) 32 a provided at the center of the rotor 32 is formed.
- the protrusion 3 2a of the 2 And is fitted into the rotor shaft support hole 103c via the washer 200.
- the sensor cover 3 1 has a plurality of mounting holes 3 1 c on its periphery,
- the wave washer 34 is sandwiched between the rotor 32 and the sensor cover 31 and is compressed and deformed by the sandwiching force to support the rotor 32 without rattling, thereby improving vibration resistance.
- a shaft hole (boss hole) 37 into which one end 3a of the throttle valve shaft 3 is fitted is formed on the surface of the rotor 32 opposite to the protrusion 32a.
- One end 3 a of the throttle valve shaft 3 is formed so that two opposing surfaces are flat, while a shaft hole 37 on the rotor side that fits into the one end 3 a of the throttle valve shaft is one end 3 a of the throttle valve shaft.
- the two opposing surfaces have a flat surface approximating the cross-sectional shape of the throttle valve, and the rotor 32 can rotate together with the throttle valve shaft 3.
- Two grooves 36 for mounting 38 are formed at 90 °
- the rotor 32 is always kept at a constant position against the axial vibration of the throttle valve shaft 3, and the fluctuation of the throttle sensor output (chattering) is reduced.
- One end 3b of the throttle valve shaft 3 opposite to the throttle sensor 30 also protrudes from the side wall of the throttle body 100 as shown in FIGS. 3 to 5, 10 and the like. And an inspection jig for applying a rotation torque from outside through the plane as required can be engaged.
- a plurality of (for example, a total of six) conductors 80 serving as a power supply conductor and a conductor 81 serving as a sensor output line are embedded by resin molding.
- the resin mold for the wiring structure of conductors 80 and 81 was removed according to Fig. 26. It will be described in the state where it was.
- connection terminals 80a 'and 80b' for connection to the external power supply, and the other end connects to the motor terminal 51 of the motorized actuator 5.
- the connection terminals are 80a and 8Ob, and are resin-molded except for these terminals.
- the other ends 81a ', 81b', 81c ', and 81d' are connector terminals for sensor output.
- Most of the conductors 80 and 81 excluding these terminals are buried with a resin mold (gear cover) 103.
- power supply terminals 80a and 80b and sensor signal output terminals 81a, 81b, 81c and 81d are gear covers 10
- the power terminals 80a and 80b are provided so as to face the motor terminal 51 of the throttle body 100 (FIG. 3, FIG. 3).
- the sensor signal output terminals 8 la to 81 d are provided on the inner bottom 103 a of the slot sensor housing 103 a corresponding to the resistance terminals 61, 61 ′ of the substrate 35. (See Figure 19).
- the power terminals 80 a and 80 b are connected to the motor terminal 51 via a joint-type fitting 82.
- the pair of resistance terminals 61 of the substrate 35 overlap with the sensor signal output terminals 8 la and 81 b, and the other pair of terminals.
- Resistor terminal 6 1 ' The signal output terminals 8 1 c 8 Id overlap, and the overlapped terminals are welded (for example, projection welding).
- Sensor signal output terminal 8 1a Sensor signal from 8b and sensor signal output terminal 8 1c 8 1d Sensor signal from external connector 8 1a ′ via conductor 8 1 8 lb and 8 1 c 8 1 (led to 1.
- the connector section 103b has 6 connector terminals 80a'80b ⁇ for power supply and 8la ', 81b81c ⁇ , 81d' for sensor signal output. Are arranged in three rows at the top and bottom.
- the gear cover 103 has a two-layer structure of an inner layer 103-3 and an outer layer 103-1, as shown in Fig. 21.
- the inner layer 103-3 is molded separately in advance.
- a gear cover main body 103-3-1 in which the conductors 8081 are buried by molding in a plate shape except for terminals, and a plate 103-2 constituting the inner layer is an outer layer; and the gear cover main body. It is made into a body by molding.
- the plate 103-2 is molded in advance with the conductors 80 and 81, and then the plate 103-3 is formed into a gear cover.
- the gear cover body 103-3 is set in a mold and the gear cover body 103-3 is molded. In this way, the plate 103-3-2 is positioned as an inner layer near the center of the gear cover 103. I do.
- the conductors with terminals 80 and 81 can be buried integrally with the terminal fixing plate 103-2, and this plate 103-2 is set on the mold frame of the gear cover body 103-1. By doing so, the conductors with terminals 80 and 81 are already fixed, so that the conductors 80 and 81 can be prevented from being out of order on the layout.
- the gear cover 103 is attached to the throttle body by screwing a screw 150 through a screw hole 15 2 provided in the cover 103 and a screw hole 15 1 provided in a corner of the frame 104. Also, the gear cover 103 must be attached to the throttle body 100 in a specified direction, and therefore, the projections 170, 171, and 172 provided on the inner surface of the gear cover 103 are attached to the throttle body 100.
- the gear cover and the throttle pod can be fitted only when the positioning surface 16 0, 16 1, 16 2 fitted on the 100 side is fitted, so that the gear cover can be mounted without mistaking the direction. It is done as follows.
- the effects of the above embodiment can be summarized as follows.
- (1) The installation space 102 for the reduction gear mechanism 4 was previously covered with a gear case provided on the side wall of the throttle pod and the gear cover that covers it.
- the gear cover 103 will cover most of the installation space 102 instead of the gear case. Therefore, the throttle body itself does not need to be integrally molded with a relatively large-volume gear case as in the past, and the volume is increased by the lightweight synthetic resin gear cover side. It is possible to reduce the size and weight of the slot pods made of steel.
- the projections for mounting the fully-closed stoppers 102 are formed. Is provided beyond the height of the frame 104, and the fully closed stop horn 12 is arranged on this projection 102a in accordance with the mounting height of the throttle gear (final gear) 43. 4 3 can be received by the fully closed stopper 1 2.
- the default lever 6 Since the default lever 6 has at least a portion forming the boss 6 f and a portion receiving the default spring 8 made of synthetic resin, the relative rotation of the default lever 6 and the throttle gear 43 twists the default spring 8. Even if this is performed, the friction between the default spring 8 and the spring receiving portion, the boss portion, etc. of the default lever 6 in contact with the default spring 8 is reduced to reduce the load on the motor. In addition, since the surfaces of the return spring and default spring are coated to reduce the coefficient of friction, metal throttle gear 43, throttle throttle 100, etc. Can be reduced.
- the compressive stress F of the spring having the larger coil diameter is set to be larger than the compressive stress f of the spring having the smaller coil diameter, so that the default lever 6 is removed. Diameter Since it is pressed in one direction at a stable position, the default lever fitted to the throttle valve shaft 3 can be maintained in a stable and appropriate state, and the accuracy of the default opening can be prevented from being deviated.
- Throttle gear (final gear) 4 3 also serves as a movable-side regulating element that regulates the mechanical fully-closed position, and this regulating element is fixed to throttle valve shaft 3 by press-fitting. Therefore, even when the throttle gear 43 comes into contact with the fully-closed flange 12 and receives an impact, the positional relationship of the throttle gear 43 with respect to the throttle valve shaft 3 can always be kept constant. Therefore, there is no deviation in the control opening of the throttle valve determined based on the mechanical fully closed position, which contributes to maintaining control accuracy.
- the flattening of the motor housing and thus the motor case 110 contributes to the reduction in size and weight of the throttle body 100, and one of the flat inner surfaces of the motor case 110 Since b constitutes the outer wall surface of the intake passage on the downstream side of the idle opening position in the control of the throttle valve 2, even when the intake air flow rate is small such as when the idler rotates.
- the cooling effect by the adiabatic expansion of the intake air flow generated downstream immediately after passing through the throttle valve 3 during idling is most efficiently received. Therefore, the cooling in the motor case and, consequently, the heat radiation of the motor housing can be enhanced, contributing to the motor cooling effect.
- one of the opposed flat inner surfaces 110b of the motor case 110 is formed so as to be recessed from the outer wall surface of the surrounding intake passage.
- the throttle sensor 30 can be assembled by assembling a set of its parts only on the gear cover 103 side, which makes assembly work very simple. If the gear cover 103 is mounted on the side wall of the throttle body 100, the tip of the throttle valve shaft 3 naturally engages with the shaft hole of the rotor 32 of the throttle sensor 30. The engagement of the throttle sensor 30 can be easily performed with one touch. Furthermore, since the throttle sensor 30 is covered and hidden by the sensor cover 31 inside the gear cover, it exhibits a dustproof function. Even when the gear cover 103 is removed or mounted, dust and parts are worn. Prevent intrusion of powder, etc., and increase sensor reliability.
- connection terminals 80a and 80b on the gear cover side which are connected to the external power supply via the joint type fittings 82 inside the gear, are connected.
- the motor terminal 51 of the rotor body 100 can be easily connected.
- the terminal fixing plate 103-3 which is a part of the gear cover 103, is formed in advance, and the conductors 80, 81 are buried when the plate 103-3 is resin-molded.
- the resin mold of No. 3 can be carried out without causing an irregular arrangement of the conductors 80 and 81.
- an electronically controlled throttle device provided with an electric actuator, a gear mechanism, a default opening setting mechanism, and the like. It can achieve the effects of reducing the size and weight, streamlining the manufacturing and adjustment work, and improving the stability and accuracy of operation.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1999/002400 WO2000068556A1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
| KR1020007001640A KR20010103145A (ko) | 1999-05-10 | 1999-05-10 | 내연 기관의 드로틀 장치 |
| US09/462,864 US6390062B1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
| JP2000617315A JP3992928B2 (ja) | 1999-05-10 | 1999-05-10 | 内燃機関のスロットル装置 |
| EP99918349A EP1191210B1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
| US09/930,273 US6371080B1 (en) | 1999-05-10 | 2001-08-16 | Throttle device for internal-combustion engine |
| US10/461,453 US6945228B2 (en) | 1999-05-10 | 2003-06-16 | Throttle device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1999/002400 WO2000068556A1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/462,864 A-371-Of-International US6390062B1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
| US09462864 A-371-Of-International | 1999-05-10 | ||
| US10/141,120 Continuation US6488010B2 (en) | 1999-05-10 | 2002-05-09 | Throttle device for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000068556A1 true WO2000068556A1 (en) | 2000-11-16 |
Family
ID=14235647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1999/002400 Ceased WO2000068556A1 (en) | 1999-05-10 | 1999-05-10 | Throttle device of internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US6390062B1 (ja) |
| EP (1) | EP1191210B1 (ja) |
| JP (1) | JP3992928B2 (ja) |
| KR (1) | KR20010103145A (ja) |
| WO (1) | WO2000068556A1 (ja) |
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| JP2004150323A (ja) * | 2002-10-30 | 2004-05-27 | Hitachi Ltd | 内燃機関の電子制御スロットル装置 |
| US6997438B2 (en) | 2003-09-15 | 2006-02-14 | Magneti Marelli Powertrain S.P.A. | Electronically controlled butterfly valve provided with a flat leaf spring and a spiral spring to establish the limp-home position |
| US7028979B2 (en) | 2003-09-15 | 2006-04-18 | Magneti Marelli Powertrain S.P.A. | Servo assisted butterfly valve provided with a flat leaf spring and a spiral spring to establish the limp-home position |
| DE10101608B4 (de) * | 2001-01-16 | 2007-10-18 | Bühler Motor GmbH | Stellantrieb |
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| JP3404254B2 (ja) * | 1997-05-07 | 2003-05-06 | 株式会社日立製作所 | エンジンのスロットル装置 |
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| US6691678B1 (en) * | 2000-04-05 | 2004-02-17 | Hitachi, Ltd. | Throttle assembly for internal combustion engine, and throttle sensor |
| JP3866899B2 (ja) * | 2000-04-06 | 2007-01-10 | 株式会社日立製作所 | 内燃機関のスロットル弁制御装置及び自動車 |
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| DE10024426A1 (de) * | 2000-05-19 | 2001-11-22 | Pierburg Ag | Klappenstelleinheit |
| US6672280B2 (en) | 2001-03-09 | 2004-01-06 | Visteon Global Technologies, Inc. | Torsion spring assembly for electronic throttle |
| DE10117542A1 (de) * | 2001-04-07 | 2002-10-10 | Siemens Ag | Drosselklappenstutzen und Elektronikmodul |
| US6734582B2 (en) * | 2001-04-10 | 2004-05-11 | International Business Machines Corporation | Linear actuator using a rotating motor |
| DE10138060A1 (de) * | 2001-08-03 | 2003-02-20 | Bosch Gmbh Robert | Drosselvorrichtung mit Antriebsaufnahme und Antriebskontaktierung |
| JP3474872B2 (ja) * | 2001-10-22 | 2003-12-08 | 本田技研工業株式会社 | 内燃機関のスロットル制御装置 |
| JP3948016B2 (ja) * | 2002-06-27 | 2007-07-25 | 株式会社デンソー | スロットル装置 |
| DE10232876A1 (de) * | 2002-07-19 | 2004-01-29 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Ermitteln einer anschlagsfreien extremalen Stellposition eines Stellgliedes einer Brennkraftmaschine |
| JP2004060540A (ja) * | 2002-07-29 | 2004-02-26 | Honda Motor Co Ltd | 内燃機関のスロットル開度制御装置 |
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| ES2307095T3 (es) * | 2004-08-18 | 2008-11-16 | Honda Motor Co., Ltd. | Sistema de control electronico de carburador. |
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| JP2006214293A (ja) * | 2005-02-01 | 2006-08-17 | Mikuni Corp | スロットル装置、燃料供給装置およびエンジン |
| JP4661668B2 (ja) * | 2006-04-12 | 2011-03-30 | 株式会社デンソー | バルブ開閉制御装置 |
| US7740228B2 (en) * | 2006-08-09 | 2010-06-22 | Hamilton Sundstrand Corporation | Valve assembly including a torsion spring coupling a valve shaft and actuator shaft |
| PL1908943T3 (pl) * | 2006-10-05 | 2009-06-30 | Magneti Marelli Spa | Przewód wlotowy rozgałęziony, o zmiennej geometrii dla silnika spalania wewnętrznego |
| JP2008240610A (ja) * | 2007-03-27 | 2008-10-09 | Aisan Ind Co Ltd | 内燃機関のスロットル装置 |
| DE102007025441B4 (de) * | 2007-05-31 | 2020-06-18 | Continental Automotive Gmbh | Lastverstelleinrichtung |
| US7628387B1 (en) | 2008-07-03 | 2009-12-08 | Briggs And Stratton Corporation | Engine air/fuel mixing apparatus |
| DE602008004647D1 (de) * | 2008-07-24 | 2011-03-03 | Magneti Marelli Spa | Saugrohr mit einem Drallsystems für einen Verbrennungsmotor |
| DE102011084341B4 (de) * | 2011-10-12 | 2017-07-06 | Bühler Motor GmbH | Stellantrieb |
| US9624840B2 (en) * | 2013-04-16 | 2017-04-18 | Mitsubishi Electric Corporation | Intake air quantity control device for internal combustion engine |
| DE102013223137A1 (de) | 2013-11-13 | 2015-05-28 | Mahle International Gmbh | Frischluftanlage für eine Brennkraftmaschine |
| FR3035470B1 (fr) * | 2015-04-23 | 2017-12-22 | Valeo Systemes De Controle Moteur | Vanne pour canalisation d'air de moteur de vehicule automobile |
| JP6720930B2 (ja) * | 2017-07-07 | 2020-07-08 | 株式会社デンソー | 絞り弁装置 |
| JP6963519B2 (ja) * | 2018-02-02 | 2021-11-10 | 株式会社ミクニ | スロットル装置 |
| KR102092651B1 (ko) | 2018-12-20 | 2020-03-24 | (주)현대케피코 | 모터 액추에이팅 밸브 |
| EP3913202A4 (en) | 2019-01-15 | 2022-03-16 | Shanghai Auzone Auto Parts Manufacturing Co., Ltd | RETURN MECHANISM FOR ELECTRONIC THROTTLE VALVE |
| CN110529262B (zh) * | 2019-10-10 | 2024-06-14 | 四川红光汽车机电有限公司 | 一种具有高怠速位置限位结构的电子节气门体 |
| JP7608231B2 (ja) * | 2021-03-25 | 2025-01-06 | 愛三工業株式会社 | スロットル装置の製造方法 |
| CN113217315B (zh) * | 2021-04-16 | 2022-07-15 | 杭州电子科技大学 | 一种公路减速带能量收集系统 |
| JP7381904B2 (ja) * | 2021-06-11 | 2023-11-16 | 株式会社デンソーダイシン | 絞り弁装置 |
| KR102585156B1 (ko) * | 2021-08-19 | 2023-10-06 | 엘지전자 주식회사 | 밸브 액튜에이터 |
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| JPH1089096A (ja) * | 1996-09-12 | 1998-04-07 | Hitachi Ltd | エンジンのスロットル装置 |
| JPH11190232A (ja) * | 1997-12-25 | 1999-07-13 | Unisia Jecs Corp | 電動式スロットル装置 |
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| JPH0759901B2 (ja) | 1985-10-04 | 1995-06-28 | 株式会社日立製作所 | 絞弁の自動制御装置 |
| DE3631283C2 (de) | 1986-09-13 | 1999-11-25 | Bosch Gmbh Robert | Einrichtung zur gesteuerten Zumessung von Verbrennungsluft in eine Brennkraftmaschine |
| JP2550962B2 (ja) | 1986-12-12 | 1996-11-06 | 日本電装株式会社 | エンジンのスロツトル弁制御装置 |
| JPS6485432A (en) | 1987-09-28 | 1989-03-30 | Hitachi Ltd | Automatic equalizer |
| US4938190A (en) * | 1989-05-05 | 1990-07-03 | Colt Industries Inc. | Throttle plate actuator |
| JP2758535B2 (ja) * | 1992-07-16 | 1998-05-28 | 株式会社日立製作所 | 電子スロットル制御装置 |
| JPH07324636A (ja) * | 1994-04-04 | 1995-12-12 | Nippondenso Co Ltd | スロットル弁制御装置 |
| DE69627401T3 (de) * | 1995-01-17 | 2014-01-30 | Hitachi, Ltd. | Luftströmungssteuervorrichtung |
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| JP3361030B2 (ja) * | 1997-03-19 | 2003-01-07 | 株式会社日立ユニシアオートモティブ | 内燃機関の電子制御式スロットル弁装置 |
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- 1999-05-10 US US09/462,864 patent/US6390062B1/en not_active Expired - Lifetime
- 1999-05-10 EP EP99918349A patent/EP1191210B1/en not_active Expired - Lifetime
- 1999-05-10 KR KR1020007001640A patent/KR20010103145A/ko not_active Withdrawn
- 1999-05-10 JP JP2000617315A patent/JP3992928B2/ja not_active Expired - Lifetime
- 1999-05-10 WO PCT/JP1999/002400 patent/WO2000068556A1/ja not_active Ceased
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| JPH0185432U (ja) * | 1987-11-30 | 1989-06-06 | ||
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| JPH11190232A (ja) * | 1997-12-25 | 1999-07-13 | Unisia Jecs Corp | 電動式スロットル装置 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10101608B4 (de) * | 2001-01-16 | 2007-10-18 | Bühler Motor GmbH | Stellantrieb |
| JP2004150323A (ja) * | 2002-10-30 | 2004-05-27 | Hitachi Ltd | 内燃機関の電子制御スロットル装置 |
| US6997438B2 (en) | 2003-09-15 | 2006-02-14 | Magneti Marelli Powertrain S.P.A. | Electronically controlled butterfly valve provided with a flat leaf spring and a spiral spring to establish the limp-home position |
| US7028979B2 (en) | 2003-09-15 | 2006-04-18 | Magneti Marelli Powertrain S.P.A. | Servo assisted butterfly valve provided with a flat leaf spring and a spiral spring to establish the limp-home position |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1191210A1 (en) | 2002-03-27 |
| US6371080B1 (en) | 2002-04-16 |
| US6390062B1 (en) | 2002-05-21 |
| JP3992928B2 (ja) | 2007-10-17 |
| EP1191210B1 (en) | 2013-03-06 |
| KR20010103145A (ko) | 2001-11-23 |
| EP1191210A4 (en) | 2008-05-07 |
| US20020029760A1 (en) | 2002-03-14 |
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