CN1292955C - Minitype vehicle - Google Patents

Abstract

A small vehicle comprising an engine arranged in front of the rear wheels, the upper part of the crankcase is swingably supported on the vehicle body frame, and a transmission for transmitting the power of the engine output to the rear wheels after changing the speed. The rear part of the device supports the rear wheel with a shaft, and the air filter installed on the transmission, the throttle body device formed by fixing the throttle valve on the valve shaft rotatably supported on the body with the air intake passage, Be connected on the cylinder head of the engine; the throttle body device (27) of the control unit for the operation control of the engine (E) assembled on the body with the elastic material (28) between the cylinder head (30) is The vehicle body frame (11) is disposed in front of a rocking support point (SP) on the upper portion of the crankcase (22). This compact vehicle reduces the vibration that reaches the control unit and reduces the load on the components that achieve vibration reduction.

Description

small vehicle

technical field

The present invention relates to a small vehicle such as a two-wheeled motor vehicle and a three-wheeled motor vehicle, and particularly relates to an engine that is disposed in front of the rear wheels and the upper part of the crankcase is swingably supported on the vehicle body frame, and a The rear part of the power unit of the transmission that transmits the output of the engine to the rear wheels after the output of the engine is changed, and the rear wheels are supported by the shaft, and the air filter installed on the transmission is rotatably supported by a The throttle body device formed by fixing the throttle valve on the valve shaft on the body is connected to the cylinder head of the engine to improve the small vehicle.

Background technique

In the rear part of the power unit including an engine arranged in front of the rear wheels, while the upper part of the crankcase is swingably supported on the vehicle body frame, and a transmission for shifting the output of the engine and transmitting it to the rear wheels, A two-wheeled vehicle is known in which the rear wheels are pivotally supported, an air cleaner attached to the transmission is connected to the cylinder head of the engine via a throttle body device (for example, refer to Patent Document 1).

However, the control unit for controlling the engine operation of such a two-wheeled motor vehicle is generally arranged at a position away from the throttle body device, and needs to introduce the throttle opening and the suction negative pressure detected on the throttle body device The wiring of the control unit requires a complicated layout design in order to ensure wiring space without interfering with other components.

Therefore, the control unit is installed on the throttle body device, so that there is no need for wiring when the detected values such as throttle opening and suction negative pressure are introduced into the control unit. This form has been realized (for example, refer to Patent Document 2)

Patent Document 1: JP-A-2001-138975

Patent Document 2: JP-A-11-294216

However, for a small vehicle such as a two-wheeled motor vehicle in which the upper part of the engine crankcase on the power plant is supported on the vehicle body frame so as to be able to swing up and down, if the control unit is installed on the throttle body device, it is not only necessary to reduce the transmission from the engine to the control unit. Vibrating dampers, and since the throttle body unit rocks up and down along with the powerplant, the required load on said dampers also tends to get bigger.

Contents of the invention

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small vehicle capable of reducing the load on components that achieve vibration damping while reducing the vibration of a ripple control unit.

In order to achieve the above object, the small vehicle according to the first aspect of the present invention comprises an engine disposed in front of the rear wheels, and the upper part of the crankcase is swingably supported on the vehicle body frame, and a motor for the engine. The rear part of the power unit of the transmission that is transmitted to the rear wheels after the output speed changes, supports the rear wheels with a shaft, and the air filter supported on the transmission is rotatably supported on the body with the air intake passage. A throttle body device formed by fixing a throttle on the valve shaft of the valve shaft, and a small vehicle connected to the cylinder head of the engine, is characterized in that: the control unit is installed on the body of the throttle body device, and the throttle body device The main body is connected to the cylinder head through an elastic material, and the throttle body device is arranged in front of a rocking support point of the vehicle body frame at the upper part of the crankcase.

According to the structure described in claim 1 of the present invention, since the elastic member is incorporated between the body of the throttle body device and the cylinder head, the vibration that acts on the throttle body device from the engine is absorbed by the elastic member, thereby enabling The vibration that spreads to the control unit assembled on the throttle body device is reduced, and the throttle body device is arranged in front of the rocking support point that can swing the upper part of the crankcase on the vehicle body frame, so the cylinder head is greatly shortened And the distance between the throttle body devices, and can reduce the load acting on the elastic member between the throttle body device and the cylinder head.

In addition, the invention according to Claim 2 of the present invention is based on the composition of the invention described in Claim 1 of the present invention, and is characterized in that, corresponding to the end of the valve shaft whose axis is substantially horizontal, The control unit is disposed outside the main body, and the bottom of the control box that accommodates the control unit and is mounted on the main body is formed as a flat portion that is provided on a surface facing the engine from above. According to such a configuration, the The capacity of the control box can be set as large as possible, and at the same time, since the bottom of the control box is flat, the degree of freedom in use can be increased.

The small vehicle according to claim 3 of the present invention is based on the constitution of the invention described in claim 1 or 2 of the present invention, and has the following features: A self-starting motor is configured. According to this configuration, the control unit and the self-starting motor are kept away from the grounded road surface of the small vehicle as far as possible, and the bad influence caused by splashing water on the road surface can be greatly prevented from affecting the control unit and the self-starting motor. At the same time, the control unit and the self-starting motor are arranged on the front and rear sides of the swing fulcrum, so the clutter from the self-starting motor can be greatly reduced to reach the control unit.

Furthermore, the invention described in claim 4 of the present invention is based on the constitution of any one of the inventions in claims 1 to 3 of the present invention, and has the following features: The throttle cable wound and connected to the throttle drum on the valve shaft and the wire connected to the control unit extend in opposite directions to each other on the part corresponding to the throttle body device According to the arrangement, when repairing one of the throttle cable and lead wires, the other one of the throttle cable and lead wires is not affected, and the maintainability of the throttle cable and lead wires can be maintained satisfactorily.

Description of drawings

Fig. 1 is a side view of a small motorized two-wheeled vehicle.

Fig. 2 is a view from the direction of arrow 2 in Fig. 1 , omitting the state of the vehicle body cover.

Fig. 3 is a view of arrow 3 in Fig. 2 .

FIG. 4 is an enlarged view of a main part of FIG. 2 .

Fig. 5 is a side view of the throttle body device viewed from the direction of arrow 5 in Fig. 4 .

FIG. 6 is a top view in cross section of the throttle body device.

Fig. 7 is a partially cutaway side view of the fuel pipe.

8 is an enlarged side view showing a longitudinal section of a mounting portion of an intake pipe of a fuel injection valve.

Fig. 9 is a view from arrow 9 in Fig. 8 .

In the figure: 11-car body frame, 22-crankcase, 25-air filter, 27-throttle body device, 28-elastic connecting cylinder as an elastic component, 30-cylinder head, 35-suction channel, 36 -Body, 37-valve shaft, 38-throttle, 39-throttle drum, 41-throttle cable, 42-control unit, 43-control box, 43a-bottom of control box, 63-self-starting motor, 51- Wire, E-engine, M-transmission, P-powerplant, SP-rocker support point, WR-rear wheel.

Detailed ways

The implementation of the present invention will be described below in conjunction with an embodiment of the present invention shown in the accompanying drawings.

Fig. 1～9 shows an embodiment of the present invention, and Fig. 1 is the side view of small-sized two-wheel motor vehicle, and Fig. 2 is the direction view of arrow 2 in Fig. 1 that has omitted the vehicle body cover state, and Fig. 3 is the arrow 3 in Fig. 2 Figure 4 is an enlarged view of the main part of Figure 2, Figure 5 is a side view of the throttle body device viewed from the direction of arrow 5 in Figure 4, Figure 6 is a top view of the cross section of the throttle body device, 7 is a partially cutaway side view of the fuel pipe, FIG. 8 is an enlarged side view showing a longitudinal section of the installation portion of the intake pipe of the fuel injection valve, and FIG. 9 is a view in the direction of arrow 9 in FIG. 8 .

First, in FIGS. 1 and 2 , the body frame 11 of a small two-wheeled motor vehicle as a small vehicle has a front tube 13 operatively supported from a front fork 12 that pivotally supports the front wheel WF, and a rearward The descending pipe 14 extending below, and the upper pipe 15 extending backward and downward from the upper part of the descending pipe 14 at a slower angle than the descending pipe 14, and the front end is connected to the rear of the upper pipe 15 and arranged backward A pair of left and right rear pipes 16, 16 extending upwards and their rear ends connected to each other are connected to the lower end of the downcomer 14, and their rear ends are connected to the middle of the two rear pipes 16, 16. A pair of left and right lower tubes 17, 17; two lower tubes 17, 17 are bent into a substantially U-shape for opening upward when viewed from the side.

In the middle part of the vehicle body frame 11 in the front-rear direction, a single-cylinder engine E is supported vertically and vertically with its cylinder axis inclined forward and upward, and is arranged in front of the rear wheel WR, and the output of the engine E is continuously adjusted. The front part of the power unit P of the continuously variable transmission M that is transmitted to the rear wheel WR after step shifting. A rear shock absorber 20 is arranged between the power units P.

Referring to FIG. 3 , upper brackets 21 are respectively fixed on the two rear pipes 16 , 16 and the connecting portions with the lower pipes 17 , 17 . On the other hand, a pair of left and right lower brackets 23 are fixed to the upper part of the crankcase 22 of the engine E, and are swingably supported at swing support points SP of engine booms 24 connected to both ends of the upper bracket 21. Hold the brackets 23 of the two lower parts. That is, the upper part of the crankcase 22 on the engine E at the front part of the power unit P is swingably supported by the vehicle body frame 11 .

Referring to Fig. 4, above the continuously variable transmission M on the left side of the rear wheel WR, an air filter 25 supported by the continuously variable transmission M is arranged, and the air purified by the filter 25 is connected to the joint through a connecting pipe 26. On the valve body device 27, the throttle body device 27 is connected to the upstream end of the suction pipe 29 bent into a slightly U-shaped shape through an elastic connecting cylinder 28 made of rubber as an elastic component, and the downstream end of the suction pipe 29, so as to It is connected to the cylinder head 30 through an intake port 31 provided in the cylinder head 30 at a substantially central position along the left-right direction of the engine E.

Moreover, the lower part of the fuel injection valve 32 that injects fuel to the intake port 31 is fitted into the upper part of the intake pipe 29, and the fuel injection valve 32 is sandwiched by the fuel injection valve 32 connected to the intake pipe 29. between the fuel connector 33 and the air intake pipe 29 .

In Fig. 5 and Fig. 6, the throttle body device 27 includes: a body 36 having an air intake passage 35 connected to the air intake port 31 of the cylinder head 30 of the engine E, and having a substantially horizontal axis and traversing the The suction passage 35 is rotatably supported on the valve shaft 37 of the body 36, and the butterfly valve is fixed on the valve shaft 37 in the suction passage 35 to adjust the amount of suction flowing through the suction passage 35. A throttle valve 38 and a throttle drum 39 fixed on one end of the valve shaft 37 outside the body 36 .

The throttle drum 39 is a mechanism disposed on the right side of the main body 36 facing forward in the direction of travel of the two-wheeled motor vehicle. The returning spring 40 of applying force, the throttle cable 41 that coils hangs, is connected on the throttle drum 39, carries out the traction operation that resists the elastic force of described returning spring 40 by the driver who drives the two-wheeled motor vehicle, to the throttle valve. 38 to the open side rotation drive.

A control box 43 housing a control unit 42 for controlling the operation of the engine E such as fuel injection amount and ignition timing is attached to the main body 36 on the opposite side to the throttle drum 39 , that is, on the left side.

The control box 43 is composed of a box body 44 and a cover 45 that is connected to the main body 36 by sealing the opening of the box body 44 and being screwed together with the box body 44. An electronic circuit not shown in the figure is provided on the circuit board 46 in the control box 43 .

On the circuit board 46, a throttle sensor 47 that detects the opening of the throttle valve 38 and is connected to one end of the valve shaft 37 is connected. An intake air temperature sensor 48 of air temperature, and further, not shown in the figure, an intake air pressure sensor that detects the negative pressure in the intake passage 35 on the downstream side of the throttle valve as the intake air pressure is also connected to the circuit board 46. .

On the upper part of the box body 44 in the control box 43, a connector part 49 is integrally provided across the upper part of the main body 36 and faces the side of the throttle drum 39, and is connected to a plurality of wires 51 that need to be connected to the control unit 42. The external connector 50 is detachably attached to the connector portion 49 from the side of the throttle drum 39 . The lead wires 51 are grouped into a wire harness 52, which extends forward from the external connector 50 attached to the connector portion 49 as shown in FIG.

On the main body 36, a shield member 53 having a partition portion 53a interposed between the lead wire 51 connected to the external connector 50 and the throttle drum 39 is attached. The partition part 53a is formed in a plate shape extending in the direction of the external connector 50 attached to the connector part 49, and on the partition part 53a, there is a valve for checking the direction of the throttle drum from above. 39 is a viewing window 54 for the winding state of the wound throttle cable 41 .

However, the throttle cable 41 is composed of an outer layer wire 55 and an inner layer wire 56 passing through the outer layer wire 55 movably, and one end of the inner layer wire 56 drawn from one end of the outer layer wire 55 is coiled. The cable support part 53b for positioning and supporting one end of the outer layer wire 55 is integrated with the protective member 53 and is wound and connected to the throttle drum 39 .

A notch 64 is provided on the cable support part 53b, and the support tube 58 with the external male thread 57 is inserted into the notch 64. A pair of nuts 59, 60 fix the support cylinder 58 on the cable support portion 53b. One end of the outer layer wire 55 is supported on the outside of the support tube 58 , and one end of the inner layer wire 56 is drawn from one end of the outer layer wire 55 and freely penetrates through one end of the inner layer wire 56 of the support tube 58 , extending on the side of the throttle drum 39 .

Such a throttle cable 41 extends forward from the corresponding cable support portion 53b and lifts upwards, corresponding to the throttle body device 27, the throttle cable 41 and the wires connected to the control unit 42 51, configured to extend inversely to each other.

The protection component 53 is positioned on the body 36 of the throttle body device 27 by a positioning pin 61 , and at the same time, is screwed on the body 36 by a single threaded component 62 . And for the portion of the throttle cable 41 disposed between the cable support portion 53b and the throttle drum 39, the screw member 62 is arranged on the side opposite to the partition plate 53a and the protective member 53 is connected to the body. 36 , the positioning pin 61 is arranged between the threaded part 62 and the throttle drum 39 , and is arranged between the main body 36 and the protective part 53 .

According to the positioning pin 61 and the screw member 62 arranged in this way, when the connector portion 49 of the external connector 50 is attached or detached, the external force acting on the spacer 53a and the outer layer wire 55 of the throttle cable 41 are applied. The reaction force on the cable support portion 53b and the direction of the force affecting the protective member 53 is clockwise in FIG. 4 around the axis of the threaded member 62 , that is, the tightening direction of the threaded member 62 . Therefore, even if there are some gaps between the positioning pin 61, the body 36 and the protection component 53, the threaded component 62 will not loosen, and the minimum number of single threaded components 62 can both prevent loosening and tighten the protection component 53 to the body. 36 on.

In the throttle body device 27 configured as described above, the upper portion of the crankcase 22 of the engine E of the power unit P is disposed on the vehicle body frame 11 in front of the swing support point SP that is swingably supported. Moreover, in the upper part of the crankcase 22, the self-starter motor 63 (refer FIG. 3) is arrange|positioned behind the said rocking support point SP. Furthermore, the bottom portion 43a of the control box 43 of the throttle body device 27 is formed as a substantially flat portion so as to face the engine E from above.

Here, a fuel tank 68 is mounted on the front portion of the vehicle body frame 11 in a portion surrounded by the down pipe 14 , the upper pipe 15 , and the two lower pipes 17 , 17 . The vehicle body frame 11, part of the power unit P, and the fuel tank 68 are covered by a synthetic resin body cover 69 consisting of a front cover 70 covering the front portion of the vehicle body frame 11. , and a pair of left and right leg shields 71 that are connected to both sides of the front cover 70, and a pair of left and right pedals 72 that are respectively connected to the lower ends of the leg shields 71, and upwardly between the two pedals 72. Square protrusion, pedal tunnel portion 73 covering fuel tank 68, and baffle portion 74 vertically downward from the outer sides of the two pedals 72, and connecting baffle portion 74, pedal 72 and pedal tunnel portion 73 and covering the vehicle. A rear cover 75 at the rear of the body frame 11.

On the rear cover 75, a two-seater type seat 76 supported by the two rear pipes 16, 16 is arranged.

On the fuel tank 68, a built-in filter 77 and a fuel pump 78 that sucks fuel in the fuel tank 68 through the filter 77, one end is connected to the other end of the fuel pipe 79 on the fuel pump 78, and is connected through the joint 33 on the fuel injection valve 32.

Such a fuel pump 78 is built in the fuel tank 68 mounted on the front part of the vehicle body frame 11 at a position away from the engine E, and since the fuel pump 78 is not attached to the power unit P, power can be realized. The miniaturization of the device P and the assembly of the power device P.

On the vehicle body frame 11, the first jig 80 holding the middle part of the fuel pipe 79 is fixed. A first clip 80 is fastened to a support plate 81 provided at the front portion of the rear pipe 16 on the left side. Furthermore, between the fuel injection valve 32 and the first clamp 80, the fuel pipe 79 is bent and arranged on the right side of the vehicle body frame 11, and the second clamp 82 for holding the part of the engine E close to the fuel pipe 79 is fastened. On the fuel pipe support plate 83, it is fixed on the side of the engine E.

Thus, the first jig 80 holding the middle portion of the fuel pipe 79 is fixed to the vehicle body frame 11, and the fuel pipe 79 is bent and arranged between the fuel injection valve 32 attached to the engine E and the first jig 80. The right side of the vehicle body frame 11, corresponding to the up and down rocking of the power unit P, the part between the first fixture 80 and the engine E in the fuel pipe 79 is twisted, and the fuel can be avoided due to the up and down rocking of the power unit P. Bending deformation occurs in the tube 79, and since the twisted fuel tube 79 has higher strength than bending, the durability of the fuel tube 79 can be improved compared with the bending deformation.

And the 2nd jig 82 that grips the engine E portion close to the fuel pipe 79 is fixed on the side of the engine E, and between the 1st and the 2nd jig 80,82, the fuel pipe 79 is bent and arranged on the side of the vehicle body frame 11. The right side, so the second jig 82 can improve the accuracy of the bending arrangement of the fuel pipe 79 on the right side of the vehicle body frame 11, and at the same time, it can prevent the fuel pipe 79 from connecting to the fuel injection valve 32. The bending deformation produced on 79.

In FIG. 7, the fuel pipe 79 is, for example, an inner layer part 79a made of fluorine-based rubber, and a middle layer part 79b made of nitrile butadiene rubber covering the inner layer part 79a, and is made of A multi-layered high-pressure tube made of polyester covering the mesh portion 79c of the middle layer portion 79b, and the outer layer portion 79b of the outermost layer made of epichlorohydrin rubber. One end of the fuel tube 79 is joined to a coupling tube 84 connected to the fuel pump 78 , and the connection of the fuel tube 79 to the coupling tube 84 is maintained by the first tube clip 85 . In addition, the other end of the fuel pipe 79 is joined to the fuel joint 33 connected to the fuel injection valve 32 , and the connection to the fuel pipe 79 of the fuel joint 33 is maintained by the second pipe clamp 86 .

As described above, since the fuel pipe 79 is composed of multiple layers of high pressure, the strength of the fuel pipe 79 is increased, and the durability of the fuel pipe 79 for introducing high-pressure fuel can be expected to be improved.

However, the fuel pipe 79 is, for example, a fuel pipe covered with a protective pipe 87 formed of ethylene propylene rubber, and one end of the fuel pipe 79 connected to the fuel joint 33 with the second pipe clip 86 is inserted into the protective pipe 87. Above, one end of the fuel pipe 79 protruding from the protection pipe 87 is connected to the joint pipe 84 with the first pipe clamp 85 .

The first jig 80 is a structure formed by integrally connecting the mounting plate portion 89 to the cylindrical portion 88, so that the cylindrical buffer rubber 90 at both ends penetrates the cylindrical portion 88 and will be butted against the cylindrical portion 88. Flanges 90 a, 90 a at both ends of the portion 88 are mounted on the cylindrical portion 88 . Then, the protective pipe 87 covering the fuel pipe 79 is penetrated into the buffer rubber 90 to hold the fuel pipe 79 by the first clamp 80, and insert it into the insertion hole 91 provided on the mounting plate portion 89. The first clamp 80 is connected to the bolt 92 of the vehicle body frame 11 .

The second clamp 82 has the same structure as the above-mentioned first clamp 80. The fuel pipe 79 is held by the second clamp 82 through the buffer rubber 90 and the protective tube 87, and the second clamp 82 is fastened to the second clamp 82 by bolts 93. On the fuel pipe support plate 83.

And the first and second clamps 80, 82 are arranged separately on the left and right sides of the vehicle body centerline BC extending in the front-rear direction, and the fuel pipe 79 and the protective tube between the first and second clamps 80, 82 87. Arbitrary clamps 80, 82 are arranged on the same side of the vehicle body frame 11 in the left and right direction, and in this embodiment, they are arranged to extend to the right side when the two-wheeled motor vehicle is in the forward state. That is, the fuel pipe 79 between the first and second clamps 80 and 82 is bent and arranged on the right side of the vehicle body frame 11 so as to protrude. Therefore, for the fuel pipe 79, the length between the first and second clamps 80, 82 can be set relatively long, so that the bending load added to the fuel pipe 79 can be more reliably suppressed, and the durability of the fuel pipe 79 can be improved. sex.

In addition, the approximate center position in the left-right direction of the engine E, that is, the disposition position of the fuel injection valve 32 is offset from the vehicle body center line BC to the same side as the first jig 80, that is, the left side, and is supported. On the vehicle body frame 11, it is advantageous to secure the rocking length of the combustion pipe 79 if it is arranged in this way.

In FIG. 8 , the intake pipe 29 is formed to connect the throttle body device 27 and the cylinder head 30 located below the throttle body device 27 and is bent into a substantially C-shape. The downstream end of the connecting pipe part 36a on the downstream side of the body 36 is tightly fitted to the downstream end of the elastic connection cylinder 28 at the upstream end, and is tightly fitted to the upstream end of the suction pipe 29, to the body of the elastic connection cylinder 28. 36 and the connection state of the suction pipe 29 is maintained by the fastening state of the third clip 94 surrounding the elastic connection tube 28 . That is, the body 36 of the throttle body device 27 is connected to the cylinder head 30 through the elastic connecting cylinder 28 and the suction pipe 29 .

Referring to Fig. 9, the fuel injection valve 32 that injects fuel to the intake port 31 of the cylinder head 30 is installed on the intake pipe 29, and the opening and closing action of the fuel injection valve 32 is accommodated and fixed in the throttle body installed on the throttle body. The control unit 42 in the control box 43 on the device 27 body 36 performs control. Further, an external connector 95 connected to a harness 52 a branched from a harness 52 that binds lead wires 51 connected to the control unit 42 is attached to the connector portion 32 a provided on the fuel injection valve 32 .

An attachment hole 96 that opens toward the cylinder head 30 side is provided in the intake pipe 29 , and the tip end of the fuel injection valve 32 is airtightly fitted in the attachment hole 96 so that the tip faces the inside of the intake pipe 29 . In addition, at the head portion of the fuel injection valve 32, there is an integrally formed connecting pipe portion 33a connected to the fuel pipe 79, and at the same time, the connecting pipe portion 33a is made liquid-tight so as to pass through the inside of the fuel injection valve 32. A fuel joint 33 made of synthetic resin is fitted.

Furthermore, the fuel joint 33 is provided with a locking recess 97 that engages with the engaging protrusion 32b provided on the fuel injection valve 32, so that the engaging protrusion 32b is engaged with the locking recess 97 and the fuel joint 33 is fitted. At the head portion of the fuel injection valve 32, the circumferential position of the fuel injection valve 32 is determined to be constant with respect to the connecting pipe portion 33a.

The fuel pipe support plate 83 is formed to extend along the fuel pipe 79 connected to the connecting pipe portion 33a of the fuel joint 33, and one end of the fuel pipe support plate 83 is connected by a plurality of, for example, a pair of bolts 98, 98 They are screwed together and fixed to the intake pipe 29 together with the fuel joint 33 . That is, between the boss portion 29a integrally protrudingly provided on the intake pipe 29 so as to extend parallel to the fuel injection valve 32 fitting the front end portion into the mounting hole 96, and the fuel pipe support plate 83 Between one end, a supporting part 33b is integrally provided on the fuel joint 33, and a pair of metal bushings 99, 99 are molded and combined on the supporting part 33. Moreover, the bolts 98, 98 inserted into one end of the fuel pipe support plate 83 and the two bushings 99, 99 are screwed on the boss portion 29a, while the support portion 33b and the boss portion 29a, a positioning clip 101 that engages with an engagement groove 100 provided on the outer periphery of the fuel injection valve 32 and determines the axial position of the fuel injection valve 32 is interposed.

The support portion 33b is located away from the circumferential position of the connecting pipe portion 33a, extends in the direction opposite to the connector portion 32a of the fuel injection valve 32, and is integrally provided with the fuel joint 33. The connecting position of the intake pipe 29 can increase the degree of freedom in arrangement of the lead wire connection portion to the fuel injection valve 32 and the connection portion to the fuel pipe 79 .

As described above, the fuel joint 33 and one end portion of the fuel pipe support plate 83 are joined by being screwed together with the intake pipe 29 , so that the circumferential position of the fuel injection valve 32 relative to the connection pipe portion 33 a of the fuel joint 33 To be constant, at the same time, the position of the fuel injection valve 32 relative to the intake port 31 of the cylinder head 30 is fixed, and the fuel injection valve 32 is sandwiched between the fuel joint 33 and the intake pipe 29 .

Of the two side parts of the fuel pipe support plate 83, the side part opposite to the fuel injection valve 32 is interposed between the wire harness 52 connected to the control unit 42 of the throttle body device 27 and the engine E, and is integrally formed at a substantially right angle. A heat-shielding wall 83 a is provided for preventing the radiant heat generated by the engine E from adversely affecting the wiring harness 52 .

At the other end of the fuel pipe support plate 83 , the second jig 82 for supporting the fuel pipe 79 is connected by bolts 83 , and the fuel pipe 79 is supported on the other end of the fuel pipe support plate 83 .

Next, the function of the embodiment will be described. The fuel joint 33 having the connecting pipe portion 33a connecting the fuel pipe 79 for introducing fuel and the fuel injection valve 32 is fixed at a constant circumferential position of the fuel injection valve 32 with respect to the connecting pipe portion 33a. , and liquid-tightly embedded in the head of the fuel injection valve 32, not only to fix the position relative to the intake port 31, but also to clamp the fuel injection valve 32 between the intake pipe 29 and the fuel joint 33 Since it is connected to the intake pipe 29, the relative position of the fuel injection valve with respect to the intake port 31 and the position of the fuel pipe 79 with respect to the fuel injection valve 32 can be adjusted by connecting the intake pipe 29 to the fuel joint 33. It is fixed and the fuel injection valve 32 can be attached to the intake pipe 29 to improve the installation reliability of the fuel injection valve 32 and the fuel pipe 79 when fuel is supplied to the single-cylinder engine E.

In addition, one end of the fuel pipe support plate 83 is connected to the intake pipe 29 by tightening together a pair of bolts 98, 98 and the fuel joint 33, and the other end of the fuel pipe support plate 83 supports the fuel pipe. 79, so the increase in the number of parts can be avoided and the vibration of the fuel pipe 79 can be reduced. Also, the fuel pipe support plate 83 is formed so as to extend along the fuel pipe 79 connected to the connection pipe portion 33a of the fuel joint 33, holds the fuel pipe 79 at the connector portion 32a of the fuel injection valve 32 and is not connected to the fuel pipe. The interference of the tube 79 can increase the degree of freedom in the arrangement of the connector portion 32a.

Furthermore, although the front part of the power plant P including the engine E is allowed to swing up and down and is supported by the vehicle body frame 11, since the fuel pipe 79 is connected to the fuel tank 68 mounted on the vehicle body frame 11 through the fuel pump 78 Therefore, the fuel pipe 79 can be rocked together with the power unit P, and the engine E can be rocked, so that the installation of the fuel injection valve 32 of the small two-wheeled vehicle mounted on the vehicle body frame 11 becomes easy.

In addition, although the throttle drum 39 is fixed on one end of the valve shaft 37 on the throttle body device 27, on the opposite side to the throttle drum 39, on the control box 43 installed on the body 36, it should be connected to The wire 51 on the control unit 42 housed in the control box 43 is connected from the side of the throttle drum 39, and a protective member 53 having a partition 53a interposed between the wire 51 and the throttle drum 39 is attached to the On the body 36.

Therefore, on the one hand, the interference between the wire 51 connected to the control box 43 and the throttle drum 39 can be reliably prevented; Wire space, and the overall compactness of the throttle body device 27 including the wire 51 near the body 36.

In addition, since the cable support portion 53b for positioning and supporting one end of the outer layer wire 55 of the throttle cable 41 is integrally formed on the protection member 53, it is not necessary to provide a dedicated support member for the throttle cable 41, reducing the number of parts. number of parts.

Furthermore, on the control box 43, the connector portion 49 detachably mounted to the external connector 50 connected to the wire 51 is integrally provided facing the throttle drum 39, and the partition plate 53a of the protective member 53 is along the opposite side. The installation direction of the external connector 50 on the connector part 49 extends in a plate shape, so when the external connector 50 is attached to the connector part 49, the external connector 50 can be guided by the partition plate 53a, so that the external The attachment and detachment work of the connector 50 becomes easy, and good maintainability is ensured.

Furthermore, the air filter 25 supported on the continuously variable transmission M of the power unit P is connected to the cylinder head 30 of the engine E through the throttle body device 27 and the intake pipe 29, and the body 36 of the throttle body device 27 is connected to the intake pipe 29 connected to the cylinder head 30 through the elastic connecting tube 28, and the control unit 42 for the operation control of the engine E is assembled to the throttle body device 27 on the body 36, and is arranged in the power unit P is in front of the rocking fulcrum SP of the vehicle body frame 11 on the upper part of the crankcase 22 on the engine E.

Therefore, the vibration acting on the throttle body device 27 from the engine E is absorbed by the elastic connecting tube 28, so that the vibration affecting the control unit 42 mounted on the throttle body device 27 can be reduced. The throttle body device 27 is arranged in the front, so the distance between the cylinder head 30 and the throttle body device 27 is extremely short, and the force acting on the elastic connecting tube 28 between the throttle body device 27 and the cylinder head 30 can be reduced. load.

In addition, on the throttle body device 27, the control unit 42 is arranged outside the main body 36 with respect to the end of the valve shaft 37 whose axis is substantially horizontal. 43a is formed as a flat portion facing the engine E from above, so the volume of the control box 43 can be set as large as possible, and since the bottom 43a of the control box 43 is a flat portion, the degree of freedom of use can be improved.

In addition, the self-starting motor 63 is arranged at the rear of the rocking fulcrum SP and on the top of the crankcase 22. Therefore, the control unit 42 and the self-starting motor 63 are kept away from the grounded road surface of the small two-wheeled motor vehicle as far as possible, so that the water splashed on the road surface will be severely damaged. The influence can not affect the control unit 42 and the self-starting motor 63 as much as possible, and at the same time, because the control unit 42 and the self-starting motor 63 are arranged on the front and rear sides of the swing support point SP, the clutter from the self-starting motor 63 can be minimized. This ripples through to the control unit 42 .

Furthermore, on the opposite side of the control unit 42 , the throttle cable 41 wound and connected to the throttle drum 39 fixed to the valve shaft 37 and the wire 51 connected to the control unit 42 are at the part corresponding to the throttle body device 27 . They are mutually extended and arranged so that when any one of the throttle cable 41 and the wire 51 is maintained, the other side of the throttle cable 41 and the wire 51 will not be affected, so that the maintenance performance of the throttle cable 41 and the wire 53 is good .

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various design changes can be made to the content of the invention described without departing from the scope of the characteristics of the present invention.

For example, the present invention can be applied to motorcycles and tricycles other than small motorcycles.

(invention effect)

According to the invention described in the technical solution 1 of the present invention, the vibration acting from the engine to the throttle body device is absorbed by the elastic member, which can reduce the vibration affecting the control unit assembled on the throttle body device, and greatly shorten the The distance between the cylinder head and the throttle body device is increased, and the load acting on the elastic member between the throttle body device and the cylinder head can be reduced.

In addition, according to the invention described in claim 2 of the present invention, the volume of the control box can be set as large as possible, and at the same time, the bottom of the control box can be formed flat, so the degree of freedom of use can be improved.

According to the invention described in the technical scheme 3 of the present invention, the bad influence brought by the splashing of road surface water can be prevented from affecting the control unit and the self-starting motor as much as possible, and at the same time, the clutter from the self-starting motor can be minimized. The control unit is not affected.

Furthermore, according to the invention described in claim 4 of the present invention, when any one of the throttle cable and the wire is maintained, the other side of the throttle cable and the wire is not affected, and the safety of the throttle cable and the wire can be ensured. Good maintainability.

Claims (5)

1. dilly, comprising the place ahead that is disposed at trailing wheel (WR), and the top of crankcase (22) can joltily be bearing in the driving engine (E) on the vehicle body frame (11) and the rear portion of the engine installation (P) of the change-speed box (M) that is used for to transmit to trailing wheel (WR) behind the output variable speed of this driving engine (E), support described trailing wheel (WR) with axle, be supported on the airfilter (25) on the described change-speed box (M), by going up the throttle body device (27) that fixed knot valve (38) forms at the valve shaft (37) of rotatably support on the body with air intake passage (35) (36), be connected on the cylinder head (30) of described driving engine (E), it is characterized in that:

Control unit (42), be installed on the body (36) of throttle body device (27), the body (36) of throttle body device (27), be connected with cylinder head by elastomeric material (28), and described throttle body device (27) is configured in the place ahead of shaking the strong point (SP) of the vehicle body frame (11) on described crankcase (22) top.

2. dilly according to claim 1, it is characterized in that: the end that is the described valve shaft (37) of approximate horizontal corresponding to axis, foreign side's configuration control unit (42) at described body (36), take in described control unit (42) and be installed on the bottom (43a) of the control box (43) on the described body (36), be formed the par that is provided with from top and described driving engine (E) opposite face.

3. dilly according to claim 1 and 2 is characterized in that: shake the rear of the strong point (SP) and dispose self starting motor (63) on the top of described crankcase (22) described.

4. dilly according to claim 1 and 2, it is characterized in that: the opposition side of described control unit (42) and be fixed in throttle gate drum (39) on the described valve shaft (37) go up reel, bonded assembly throttle gate cable (41) and be connected in lead (51) on the described control unit (42), the mode with mutual reverse extension on corresponding to the part of described throttle body device (27) disposes.

5. dilly according to claim 3, it is characterized in that: the opposition side of described control unit (42) and be fixed in throttle gate drum (39) on the described valve shaft (37) go up reel, bonded assembly throttle gate cable (41) and be connected in lead (51) on the described control unit (42), the mode with mutual reverse extension on corresponding to the part of described throttle body device (27) disposes.

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