JPH05180005A - Throttle control device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a throttle control device equipped with an electric motor and an electromagnetic coil, wiring is facilitated during assembly and mounting on an internal combustion engine to ensure good workability. [Structure] The lid 3 has an electromagnetic coil 20 and an electric motor 9
In addition to supporting 0, the wiring board 10 is supported, and the terminals of the electromagnetic coil 20 and the electric motor 90 are electrically connected to the wiring board 10. As a result, by connecting only one connector 9 to the wiring board 10, both are connected to the controller 100.
Can be electrically connected to. Also, color 10
The wiring board 10 can be properly supported by the b, the wave washer 10c, and the screw 10e.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle control device mounted on an internal combustion engine, and more particularly to controlling an opening / closing of a throttle valve by an electric motor according to at least an accelerator operation amount, and an electric clutch and an electric motor by an electromagnetic clutch mechanism. The present invention relates to a throttle control device capable of connecting and disconnecting shafts.

[0002]

2. Description of the Related Art Conventionally, an accelerator operating mechanism is mechanically connected to a throttle valve, but recently, various devices for opening and closing the throttle valve in response to an accelerator operation by a drive source such as an electric motor have been proposed. ing.

For example, in the throttle control device disclosed in Japanese Patent Laid-Open No. 2-204641, the throttle opening / closing means and the second driving means are connected by the clutch means, and the second driving means is driven by the driving source to operate the accelerator. It is configured to be rotationally driven according to the operation of.
And, at the time of abnormal operation of the drive source, the second
By disconnecting the clutch means between the driving means and the throttle opening / closing means and operating the accelerator operating mechanism in excess of a predetermined operation amount, the throttle opening / closing means is rotationally driven via the first driving means. It is designed to ensure the throttle opening. Specifically, when the electromagnetic clutch mechanism, which is the clutch means, is in the non-energized state, the accelerator pedal may be depressed by a predetermined amount or more to mechanically engage with the throttle opening / closing means to secure a predetermined throttle opening degree. Is configured. In addition, JP-A-3-9
Japanese Unexamined Patent Publication No. 39 discloses a throttle control device capable of smoothly shifting to normal throttle control when the constant speed traveling control is released.

[0004]

Although neither of the above publications describes the electrical connection of the coils of the electromagnetic clutch mechanism, the coils are supported on the housing side while the motor is on the cover side. In general, two connectors, that is, a connector for connecting the coil to the controller and a connector for connecting the motor to the controller are provided.

However, when the throttle control device is provided with two connectors, two protrusions are formed, which poses a problem of mountability on the internal combustion engine. Also,
At the time of assembling, the terminals of the motor and the coil must be electrically connected to the respective connectors, and at the time of mounting on the internal combustion engine, wiring must be made to the respective connectors, resulting in a problem of workability. If two connectors are provided in this manner, not only the number of parts is large and the size is large, but also the number of working steps is increased and the cost is increased.

Further, it is possible to electrically connect the motor to the connector using the printed wiring board (hereinafter, simply referred to as a wiring board) described in the above publication, but if the wiring board is firmly fixed to the cover. When mounted on an internal combustion engine, the wiring board may be damaged because it is subjected to severe conditions with respect to vibration and temperature changes, for example.

In view of the above, the present invention provides a throttle control device capable of performing throttle control by an electric motor in accordance with at least an accelerator operation amount and intermittently connecting and disconnecting the electric motor and the throttle shaft by an electromagnetic clutch mechanism. It is an object of the present invention to facilitate wiring at the time of assembling the electromagnetic clutch mechanism and at the time of mounting the electromagnetic clutch mechanism on the internal combustion engine to ensure good workability. Another object of the present invention is to enable the wiring board to be properly supported without being affected by vibration and temperature change.

[0008]

In order to achieve the above object, the present invention provides an accelerator operating mechanism, an electric motor that outputs a driving force at least in accordance with an operation amount of the accelerator operating mechanism, and a throttle valve. A throttle shaft that is fixed and rotatably supported by a housing, an electromagnetic clutch mechanism that has an electromagnetic coil and that connects and disconnects the connection relationship between the electric motor and the throttle shaft, and the throttle that controls the electromagnetic clutch mechanism and the electric motor. A throttle control device including a controller for opening and closing a valve, comprising: a lid mounted on the housing to cover at least the electromagnetic clutch mechanism; and a wiring board supported by the lid, wherein the lid includes at least the electromagnetic coil and the electric motor. The electromagnetic coil and the electric motor are supported on the wiring board while supporting the motor. Is obtained so as to electrically connect the child.

In the above throttle control device, a connector can be connected to the wiring board, and the connector can be electrically connected to the electromagnetic coil and the electric motor via the wiring board.

In the above throttle control device,
A hole for mounting is formed in the wiring board, and the wiring board has a tubular body portion and a flange portion formed to extend in a radial direction at one end of the tubular body portion, and a tip of the tubular body portion is a hole of the wiring board. A collar that is inserted through and protrudes, a screw that is inserted through the inside of the tubular portion of the collar and is screwed to the lid, and a head is locked to the tip of the tubular portion, the head of the screw and the wiring. The wiring board is fitted to the tubular portion between the boards, and a biasing member for biasing the head portion of the screw and the wiring board in a direction of expanding the wiring board is provided on the lid. It may be configured to support by pressing.

[0011]

In the throttle control device having the above structure, the terminals of the electric motor and the electromagnetic coil are both electrically connected to the wiring board and can be connected to the controller by a single connector. Wiring is easy when mounted on an internal combustion engine. Further, when the wiring board is attached to the lid, in the case where the collar and the urging member are provided between the screw and the wiring board, the wiring board is pressed and supported by the lid, so that the wiring board is not affected by vibration and temperature change. It is supported in a stable state without being damaged.

Thus, the controller controls the driving force of the electric motor based on the target throttle opening degree according to the operation amount of the accelerator operating mechanism, and the throttle valve is opened / closed by this driving force to adjust the throttle opening degree. It When the throttle control device is abnormal, the connection between the throttle shaft and the electric motor is released by the electromagnetic clutch mechanism.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the throttle control device of the present invention will be described below with reference to the drawings. 1 and 2 relate to an embodiment of the present invention and show a throttle control device mounted in an automobile, in which a throttle valve 11 is housed in a housing 1 forming an intake passage of an internal combustion engine. The throttle valve 11 is fixed to the throttle shaft 12, and the bearing 2 in which the outer ring 2a is fitted to the housing 1 is attached.
A throttle shaft 12 is rotatably supported by the housing 1 via. One end of the throttle shaft 12 extends from the housing 1, and a wall portion 1a is formed to extend on a side surface of the housing 1 around the extension portion 12a. A lid 3 is joined to the wall portion 1a, and the lid 3 is formed by these. The main part of the components that make up the throttle control device of the present embodiment is housed in the enclosed room. Throttle shaft 12
At the base end of the extending portion 12a of the collar 12, as shown in FIG.
b and a step portion 12c having an oval cross section are formed, and the flange portion 12b is brought into contact with the inner ring 2b of the bearing 2 and positioned.

As shown in FIG. 2, a cylindrical support 4 is formed integrally with the housing 1 on the side surface of the housing 1 opposite to the wall 1a and supporting the other end of the throttle shaft 12. A return spring (not shown), that is, a return spring, is housed therein, and the throttle shaft 12 is biased toward the fully closed position of the throttle valve 11. Further, a throttle sensor 13 is connected to the tip of the other end of the throttle shaft 12. This throttle sensor 13 is the throttle shaft 1.
The rotational displacement of No. 2 is converted into an electric signal, and the structure thereof is well known, and the description thereof is omitted. From this throttle sensor 13, for example, an idle switch signal indicating the fully closed position of the throttle valve 11 and a throttle opening signal corresponding to the opening of the throttle valve 11 are output to the controller 100.

In FIG. 4, a clutch holder 50 is mounted so as to come into contact with the flange portion 12b of the throttle shaft 12. The clutch holder 50 has a disk-shaped shaft portion 51 having a hole formed in the center thereof, and a recess 52 having an oval cross section is formed continuously with the hole of the shaft portion 51. When the shaft portion 51 of the clutch holder 50 is inserted into the extending portion 12a of the throttle shaft 12 and the step portion 12c having the same cross-sectional shape as the recess portion 52 is fitted in the recess portion 52, the clutch holder 50 moves around the throttle shaft 12. It will rotate integrally with the throttle shaft 12 without rotating. The clutch holder 50 has a hole 53 formed at the outer edge thereof, through which a pin 42 described later is inserted, and a hole 54 for caulking and coupling a leaf spring 45 described later.

Further, the clutch plate 40 is supported on the shaft portion 51 of the clutch holder 50 so as to be movable in the axial direction. The clutch plate 40 is a disk-shaped magnetic body,
A mountain-shaped claw 41 having a triangular cross section that extends radially is formed. The clutch plate 40 and the clutch holder 5
It is connected to 0 via a leaf spring 45. That is, one end of the leaf spring 45 is fixed to the clutch plate 40 by the pin 46, and the other end is fixed to the clutch holder 50 by the pin 55.

The leaf spring 45 is formed by pressing a single plate of spring material, and has three connecting portions (not shown) for connecting the clutch plate 40 and the clutch holder 50.
Are arranged so as to form a substantially triangular shape, and each end is integrally connected by an arc-shaped frame (not shown). Further, a pressing piece 47 is formed so as to extend from the end of one of the connecting portions, and a hole 47a is formed at the tip thereof.
(FIG. 6) is drilled. In the leaf spring 45, the pin 46 is inserted into one hole of each connecting portion and the clutch plate 4 is inserted.
The pin 55 is fixed to 0, and the pin 55 is inserted into the other hole to be fixed to the clutch holder 50. Therefore, with respect to the clutch plate 40, both the leaf spring 45 and the pressing piece 47 are supported by one of the pins 46.

When assembling, the leaf spring 45 is first caulked by the pin 55 into the hole 54 of the clutch holder 50, and the pin 42 is inserted into the hole 47a of the pressing piece 47 so that the hole of the clutch holder 50 is inserted. It is inserted in 53. Next, the central hole of the clutch plate 40 is fitted into the shaft portion 51 of the holder 50, the pin 46 is inserted from the hole (not shown) of the clutch holder 50, and the leaf spring 45 is caulked and coupled to the clutch plate 40. It As a result, the clutch plate 40 and the clutch holder 50 are connected, and the pin 42
The head portion 42b is held in an upright state by being pressed against the clutch plate 40 by the urging force of the pressing piece 47. As shown in FIG. 4, the clutch holder 50 to which the clutch plate 40 is connected in this manner has its shaft portion 51.
Is inserted into the extending portion 12a of the throttle shaft 12,
The bearing 36 is arranged so that the inner ring contacts one end of the shaft portion 51.
Is press-fitted. As a result, the clutch holder 50 is positioned at a predetermined position on the extension 12a of the throttle shaft 12.

Further, the extension portion 1 of the throttle shaft 12
A magnetic rotor 30 is rotatably supported by 2a. As shown in FIG. 4, the rotor 30 has a shape in which a shaft portion 31 supported by the extending portion 12 a of the throttle shaft 12 and a cylindrical body portion 32 are connected via an arm portion 33 by sintering an iron-based material. Is formed in. Cylindrical portion 32 of rotor 30
External teeth 34 are integrally formed on the outer peripheral side surface of the outer peripheral side surface of the clutch. A mountain-shaped claw 35 having a triangular cross section is continuously formed over the entire circumference.

In the rotor 30, the outer ring of the bearing 36 is fitted in the recess formed on one side of the shaft portion 31, and
An outer ring of a bearing 37 is fitted in a recess formed on the other side of the shaft portion 31, and is supported by the extending portion 12a of the throttle shaft 12 via these bearings 36 and 37. The inner ring of the bearing 37 is the throttle shaft 12
The holder 38 is press-fitted into the extended portion 12a of the inner ring and is brought into contact with the side surface of the inner ring. The holder 38 is provided with the extension portion 12 so that the rotor 30 does not loose in the axial direction.
It is axially pressed and supported by a screw 12d screwed to the tip of a through a wave washer 39. Thus, the rotor 30 has the extension 12 of the throttle shaft 12.
It is accurately positioned at a predetermined position on a and is supported so that it can smoothly rotate around the extending portion 12a.

On the other hand, a recess 3a is formed in the substantially central portion of the lid 3, and the electromagnetic coil 20 has a central axis of the electromagnetic coil 20 and the central axis of the throttle shaft 12 which are aligned with each other by means of so-called anchoring. Is fitted to. As is apparent from FIGS. 4 and 5, the electromagnetic coil 20 includes a magnetic yoke 21 and a coil 23 wound around a resin bobbin 22. The yoke 21 has a cylindrical body portion 21 at the center.
A cylindrical hollow portion having a bottom is formed around the cylindrical body portion 21a, and the bobbin 22 and the coil 2 are formed in the hollow portion.
3 are accommodated. A flange portion 21b is formed on the outer periphery of the yoke 21, and the flange portion 21b is formed as shown in FIG.
As shown in FIG. 3, the lid 3 is screwed.

When the lid 3 is joined to the wall portion 1a, as shown in FIG.
, The outer surface of the yoke 21 is surrounded by the tubular portion 32 of the rotor 30, and the shaft portion 31 of the rotor 30 has the yoke 2
It is held in a superposed state along the axis with a predetermined gap with respect to one cylindrical body portion 21a. As a result, magnetic loss in the gap between the yoke 21 and the rotor 30 is suppressed, and a predetermined magnetic permeance is secured. Thus, the electromagnetic coil 20, the rotor 30, the clutch plate 40, and the clutch holder 50 constitute the electromagnetic clutch mechanism according to the present invention.

As shown in FIG. 4, the clutch plate 40
The pin 42 supported by is composed of a cylindrical main body 42a and a head portion 42b whose both axial end surfaces are spherical. That is, the head portion 42b has a spherical bottom portion and a shoulder portion. The hole 47a of the pressing piece 47 is set to have a diameter that allows only the main body 42a of the pin 42 to be inserted, and the top surface of the head portion 42b is pressed against the clutch plate 40.
Is always erected substantially perpendicular to the plate surface of the clutch plate 40 as shown in FIG. The body 42a of the pin 42 is loosely fitted in the hole 53 of the clutch holder 50,
Normally, as shown in FIG. 4, the tip of the main body 42a projects from the hole 53 of the clutch holder 50.

The clutch plate 40 is pressed by the pressing piece 47.
The operation plate 6 is provided in the vicinity of the pin 42 pressed and supported on the upper side.
0 is arranged so as to face the clutch holder 50 at each outer edge portion. The operation plate 60 is a cam-shaped plate body as shown in FIG. 2, one end of which is fixed to an accelerator shaft 62 as shown in FIG. 3, and the housing is such that the accelerator shaft 62 is substantially parallel to the throttle shaft 12. Supported by 1. That is, the outer ring 65a of the bearing 65 is fitted to the bearing portion 1b formed in the housing 1, and the outer ring 66a of the bearing 66 is fitted to the bearing portion 3b formed in the lid 3 to form the bearings 65, 66. The accelerator shaft 62 is supported via the shaft so that it can rotate smoothly.

When the electromagnetic coil 20 is not excited, the operation plate 60 rotates about the accelerator shaft 62, that is, the side end surface 60a of the operation plate 60 contacts the side surface of the main body 42a of the pin 42 in accordance with the depression amount of the accelerator pedal 7. Arranged for engagement. Then, when the side end surface 60a of the operation plate 60 abuts on the main body 42a of the pin 42 and an operation force is applied to the pin 42, the pin 42 can swing about the head 42b within a predetermined angle range. Has been done. That is, as shown in FIG. 6, the pin 42 is tilted with respect to the clutch plate 40 in the hole 47a of the pressing piece 47 by the operation force of the operation plate 60, is in contact with the hole 53 of the clutch holder 50, and is tilted by a predetermined angle. The clutch plate 40 and the clutch holder 50 can rotate according to the rotation of the operation plate 60. Thus, the clutch plate 40 does not tilt with respect to the rotation axis, and the rotor 3
Zero is maintained at a substantially constant interval over the entire circumference.

As shown in FIG. 3, the accelerator shaft 62 has a flange portion 62b having a larger diameter than the main body 62a at one end of the main body 62a, and a stepped portion 6 having the same diameter as the main body 62a and an oval cross section.
2c, and a support portion 62d having a smaller diameter than the main body 62a is formed. The inner ring 65b of the bearing 65 is fitted into the support portion 62d, and the side surface of the stepped portion 62c is the bearing 6
The inner ring 65b of No. 5 is abutted.
The step portion 62c of the accelerator shaft 62 has an oval-shaped hole (not shown) of the operation plate 60 having substantially the same cross section as the step portion 62c.
Are welded after they are fitted together, so that the operation plate 60
Rotates together with the accelerator shaft 62.

Further, on the accelerator shaft 62, a spring holder 63 composed of a cylindrical main body 63a and a flange portion 63b formed at the end thereof, and a coil spring 64 fitted to the main body 63a are bearings 65, 66. It is installed between. That is, the coil spring 64 is interposed between the flange portion 62b and the flange portion 63b, and is arranged so as to urge the coil spring 64 in a direction of expanding the gap between them. At this time, the flange 63b side of the spring holder 63 is on the inner ring 6 of the bearing 66.
It is formed so as to contact only 6b. A holder 5d and an accelerator link 5, which will be described later, are attached to the accelerator shaft 62 outside the lid 3, and the washer 6 is attached.
It is fixed by a nut (or bolt) 62f via 2e. As a result, the coil spring 64 is put in a compressed state and a spring load is applied to the bearings 65 and 66.

Thus, the accelerator shaft 62 is positioned at a predetermined position with its axial movement restricted between the bearing portion 1b of the housing 1 and the bearing portion 3b of the lid 3. Further, by setting the spring load of the coil spring 64 to an appropriate value, the vibration applied to the accelerator shaft 62 is reliably absorbed, and the occurrence of backlash is prevented.

The accelerator link 5 is integrally formed with a lever 5a for locking one end of the accelerator cable 6 and a lever 8a for driving the accelerator sensor 8. The other end of the accelerator cable 6 is connected to an accelerator pedal 7 as shown in FIG. 2 to form an accelerator operation mechanism, and an accelerator shaft 62 rotates in response to an operation of the accelerator pedal 7 and an operation fixed to this. The plate 60 rotates about the axis of the accelerator shaft 62.

Further, around the accelerator shaft 62, a pair of return springs 5b and 5c are housed in a holder 5d and arranged outside the lid 3, and one ends of these return springs 5b and 5c are engaged with the accelerator link 5. The other end of the accelerator shaft 62 is stopped, and the other end is locked to the standing wall portion 3c of the lid 3, so that the accelerator shaft 62 is biased toward a predetermined initial position.
That is, the accelerator pedal 7 connected via the accelerator cable 6 is urged to be in the fully closed position. Then, a bracket 80 is fixed to the lid 3 so as to cover the return springs 5b, 5c and the like, and the accelerator sensor 8 is attached to the bracket 80. Thus,
In response to the rotation of the accelerator link 5, the accelerator sensor 8 operates via a lever 8a formed integrally with the accelerator link 5,
The rotation angle of the accelerator shaft 62, that is, the depression amount of the accelerator pedal 7 is detected, and a signal corresponding to the accelerator operation amount is output to the controller 100.

As shown in FIGS. 1 and 2, an electric motor 90 is fixed to the lid 3, and its rotation shaft is rotatably supported in parallel with the throttle shaft 12. A pinion gear 91 is fixed to the tip of the rotating shaft of the electric motor 90. The pinion gear 91 is arranged so as to mesh with the outer teeth 34 on the outer circumference of the rotor 30, and the flange portion 92 formed on the outer circumference of the electric motor 90 is attached to the lid 3. The formed cylindrical support portion 3d
It is fixed to the end face of the with screws. In the present embodiment, a step motor is used as the electric motor 90, and the drive is controlled by the controller 100.
Other types of electric motors such as C motors may also be used.

As shown in FIG. 5, the terminal or terminal 93 of the electric motor 90, the terminal or terminal 24 of the electromagnetic coil 20 and the terminal or terminal 9a of the connector 9 are shown.
Extend in the same direction (rightward in FIG. 1) in the lid 3 and are electrically connected to the wiring (not shown) printed on the wiring board 10. As shown in FIGS. 7 and 8, a hole 10a is formed in this wiring board 10, and a cylindrical body portion having an outer diameter smaller than this and a radially extending one end thereof are formed in the hole 10a. The collar 10b having a large-diameter collar portion is inserted, the tip of the tubular portion projects, and a predetermined gap is formed between the outer periphery of the tubular portion and the hole. And color 10b
Wave washer 1 as a biasing member on the outer circumference of the tip of the cylindrical body
0c is fitted, and the screw 10e is inserted into the tubular portion of the collar 10b and screwed onto the lid 3, the head of the screw 10e is locked to the tip of the tubular portion of the collar 10b via the washer 10d. As a result, the wave washer 10c is compressed, and the elastic force of the wave washer 10d and the wiring board 1
The wiring board 10 is pressed and supported by the lid 3 by being urged in the direction in which the space between 0 is expanded.

Thus, the wiring board 10 is supported in a stable state by absorbing the vibration applied to the mounting portion to the lid 3 and the thermal stress due to the temperature change. Moreover, as described above, the electric motor 90, the electromagnetic coil 20 and the connector 9 are arranged in the lid 3, and the electric motor 90 and the electromagnetic coil 20 are electrically connected to one connector 9 via the wiring board 10. Therefore, the wiring is easy at the time of assembling and mounting on the internal combustion engine. The connector 9 is connected to the controller 100 as shown in FIG.

The controller 100 is a control circuit including a microcomputer. The controller 100 is mounted on a vehicle and receives detection signals from various sensors, and the electromagnetic coil 20 and the electric motor 9 are input.
Various controls including 0 drive control are performed. In the present embodiment, the controller 100 is configured to perform various controls such as constant speed traveling control and acceleration slip control in addition to the control according to the normal accelerator operation.
For example, the description is omitted in JP-A-3-939.

The operation of the throttle control device of this embodiment having the above configuration will be described. When the electric motor 90 is rotationally driven to rotate the pinion gear 91, the rotor 30 having the external teeth 34 meshing with the electric motor 90 rotates around the throttle shaft 12. At this time, when the electromagnetic coil 20 is in the non-excited state, the clutch plate 40 is separated from the rotor 30 by the biasing force of the leaf spring 45 and is in a position close to the clutch holder 50 side. That is, in this case, the clutch plate 40, the clutch holder 50, and the throttle valve 11
Is in a state in which it can freely rotate about the throttle shaft 12 regardless of the rotor 30. In addition, the pin 42 that is pressed against the clutch plate 40 by the pressing piece 47.
Is a side end surface 60a of the operation plate 60 according to the rotation thereof.
Is in a state capable of abutting on the pin 42.

When the coil 23 of the electromagnetic coil 20 is energized and the yoke 21 and the rotor 30 are excited, the electromagnetic force causes the clutch plate 40 to be attracted in the direction of the rotor 30 against the biasing force of the leaf spring 45 and the pawl of the rotor 30. 35 and the claw 41 of the clutch plate 40 mesh with each other. That is, the clutch plate 40 and the rotor 30 are in a coupled state, and the two are in a state in which they can rotate integrally. As a result, the drive control amount of the electric motor 90 changes from the pinion gear 91 to the rotor 3
Is transmitted to the rotor 30 via the outer teeth 34 of
0 is transmitted to the clutch plate 40 via the claw 35 and the clutch plate 40, and further transmitted to the clutch holder 50 via the leaf spring 45, and thus to the throttle shaft 12 which rotates integrally with the clutch holder 50. Was
The opening of the throttle valve 11 is controlled according to the drive control amount. At this time, the pin 42 is the clutch plate 4
It moves in the direction of the rotor 30 together with 0 and is in a state irrelevant to the rotation of the operation plate 60, and the side end surface 60a has the pin 42
Will not engage.

When the coil 23 is de-energized while the throttle valve 11 is open, the engagement between the claw 41 of the clutch plate 40 and the claw 35 of the rotor 30 is released, and the support 4 (not shown) is shown. The throttle valve 11 is fully closed by the urging force of the return spring. As a result, the side end surface 60a of the operation plate 60 has a positional relationship in which the side end surface 60a of the operation plate 60 can abut and engage with the main body 42a of the pin 42. When the operation plate 60 is rotated in this state, the side end surface 60
a contacts the main body 42a of the pin 42, the clutch plate 40 and the clutch holder 50 are rotationally driven through the pin 42 and the leaf spring 45, and the throttle valve 11 is driven in the opening direction. As described above, when the electromagnetic coil 20 is excited in this embodiment, the operation plate 60 is
The engagement between the pin 42 and the pin 42 is surely disengaged, and when the electromagnetic coil 20 is de-excited, both can be reliably engaged.

Next, regarding the throttle control device of the above-mentioned embodiment, the throttle control operation according to the driving of an automobile equipped with the same will be described. First, during normal accelerator control,
When the accelerator pedal 7 is depressed, an output corresponding to the operation amount is output from the accelerator sensor 8 to the controller 1.
The target throttle opening degree is set according to the accelerator operation amount. When the electric motor 90 is driven and the throttle shaft 12 rotates, a signal corresponding to the rotation angle is output from the throttle sensor 13 to the controller 100 so that the throttle valve 11 becomes substantially equal to the target throttle opening. The electric motor 90 is drive-controlled by the controller 100. Thus, the throttle control corresponding to the operation amount of the accelerator pedal 7 is performed, and the engine output according to the opening degree of the throttle valve 11 is obtained. In this way, there is no mechanical connection between the accelerator pedal 7 and the throttle valve 11, and smooth starting and running can be ensured according to the operation of the accelerator pedal 7. When the accelerator pedal 7 is released, the throttle valve 11 is fully closed by the urging force of the return spring (not shown) in the support 4 and the driving force of the electric motor 90.

Further, as described above, since the operation plate 60 and the pin 42 are not engaged with each other during normal operation, the electric motor 9 is depressed even if the accelerator pedal 7 is depressed by a predetermined operation amount or more.
There is no mechanical interference with the zero throttle control. Therefore, for example, when an acceleration slip occurs on a road surface having a low coefficient of friction and the control shifts to the acceleration slip control, the throttle valve 11 can be fully closed even if the driver depresses the accelerator pedal 7 widely. Slip control can be performed and stable running can be secured.

Further, when an abnormality of the device is detected, including an abnormal operation of the throttle valve 11, for example, the electromagnetic coil 20 is de-energized, the rotor 30 and the clutch plate 40 are separated, and the throttle valve 11 inside the support 4 is separated. Return spring returns to the initial position. Further, the driving of the rotor 30 by the electric motor 90 is also stopped. At this time, the clutch plate 40 moves to the clutch holder 50 side, so that the pin 42 moves toward the operation plate 6.
It is a position where it can be engaged with the side end surface 60a of 0. Therefore, by depressing the accelerator pedal 7 by a predetermined amount or more, the side end surface 60a of the operation plate 60 contacts the pin 42, and the throttle shaft 12 rotates via the clutch plate 40 and the clutch holder 50. The operation force of the accelerator pedal 7 by a person can be directly transmitted to the throttle shaft 12.

[0041]

Since the present invention is configured as described above, it has the following effects. That is, in the throttle control device of the present invention, the lid supports the electromagnetic coil and the electric motor and the wiring board, and the terminals of the electromagnetic coil and the electric motor are electrically connected to the wiring board. Therefore, wiring at the time of assembly is easy, and good workability can be secured. In addition, if the connector is connected to the wiring board, the electromagnetic coil and the electric motor can be electrically connected to each other, so that only one connector is required, and the device can be formed in a small size and the internal combustion engine Wiring is easy when mounted on.
Therefore, the mountability and workability are improved, and the cost is reduced.

Further, in the case where the collar and the urging member are interposed between the screw and the wiring board, since the wiring board is pressed and supported by the lid by the urging force, the wiring board is urged by the vibration and the temperature change. The wiring board can be supported in a stable state without being deformed or damaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a throttle control device of the present invention.

FIG. 2 is a perspective view of an embodiment of a throttle control device of the present invention.

FIG. 3 is an enlarged sectional view of an accelerator shaft portion according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a throttle shaft portion according to an embodiment of the present invention.

FIG. 5 is a rear view showing the inside of the lid according to the embodiment of the present invention.

FIG. 6 is a plan view showing the relationship between the operation plate and the pins in the embodiment of the present invention.

FIG. 7 is an exploded perspective view of an attachment portion for attaching the wiring board to the lid according to the embodiment of the present invention.

FIG. 8 is a cross-sectional view of an attachment portion of a wiring board to a lid according to an embodiment of the present invention.

[Explanation of symbols]

1 Housing 3 Lid 7 Accelerator Pedal 8 Accelerator Sensor 9 Connector, 9a Terminal (Terminal) 10 Wiring Board 10a Color, 10c Wave Washer (Biasing Member) 11 Throttle Valve 12 Throttle Shaft 13 Throttle Sensor 20 Electromagnetic Coil, 24 Terminal (Terminal) 21 yoke 23 coil 30 rotor 34 outer teeth 35, 41 claw 40 clutch plate 42 pin 45 leaf spring 47 pressing piece 50 clutch holder 60 operation plate 60a side end surface 62 accelerator shaft, 62b flange 63 spring holder 64 coil spring 90 electric motor, 93 Terminal 100 Controller

Claims (3)

[Claims] 1. An accelerator operating mechanism, an electric motor that outputs a driving force at least according to an operation amount of the accelerator operating mechanism, a throttle shaft that fixes a throttle valve and rotatably supports the housing, and an electromagnetic coil. A throttle control device comprising: an electromagnetic clutch mechanism that has a connection and disconnection between the electric motor and the throttle shaft; and a controller that controls the electromagnetic clutch mechanism and the electric motor to open and close the throttle valve, in the housing. A lid that covers at least the electromagnetic clutch mechanism and a wiring board that supports the lid is provided, the lid supports at least the electromagnetic coil and the electric motor, and the wiring board includes the electromagnetic coil and the electric motor. Throttle control characterized by electrically connecting the terminals of the motor apparatus. 2. The throttle control device according to claim 1, wherein a connector is connected to the wiring board, and the connector is electrically connected to the electromagnetic coil and the electric motor via the wiring board. 3. The wiring board is provided with a mounting hole, and has a tubular body portion and a flange portion formed to extend in a radial direction at one end of the tubular body portion, and the tip of the tubular body portion is A collar protruding through the hole of the wiring board, a screw inserted through the cylindrical body portion of the collar and screwed to the lid, and a head of which is locked at the tip of the cylindrical body portion; The wiring board is provided with a biasing member that is fitted to the cylindrical portion between the head and the wiring board and that biases the head of the screw and the wiring board in a direction of expanding. The throttle control device according to claim 1, wherein the throttle control device presses and supports the lid.