ES2264592B1 - STRUCTURE TO SUPPLY FUEL TO A MOTOR IN A SMALL SIZE VEHICLE. - Google Patents

Abstract

Structure to supply fuel to an engine in a small vehicle. Problem: In a small-sized vehicle in which an intake pipe that communicates with an intake port of the cylinder head is connected to a cylinder head of a motor, and, a fuel injection valve that injects fuel into the intake port is mounted on the intake pipe or cylinder head, it can improve the reliability of mounting the fuel injection valve and a fuel hose when the fuel is supplied to a single cylinder engine or when It supplies fuel independently to respective cylinders of a multi-cylinder engine. Solution means: A fuel supply connector (33) that has a connection tube (33a) to which a fuel hose (79) is connected to introduce fuel into a fuel injection valve (32), is tightly fitted on a head of the fuel injection valve (32), and the fuel supply connector (33) is fixed to the intake pipe (29) such that the fuel supply connector (33) is sandwiched between the fuel valve fuel injection (32) and the intake pipe (29) while placing the position of the fuel injection valve (32) with respect to the intake port (31) in a fixed position that does not rotate.

Description

Structure to supply fuel to a Engine in a small vehicle.

Detailed description of the invention Technical field to which the invention

The present invention relates to a vehicle small in size in which an intake tube that communicates with an intake hole of the cylinder head is connected to a cylinder head of a motor mounted on a frame vehicle body, and a fuel injection valve which injects fuel into the intake hole is mounted in the intake pipe or cylinder head, and more in particular to an improvement of the fuel supply structure to a engine.

Prior art

In a small vehicle, such as a motorcycle, on which a multi-cylinder engine is mounted, is already knows an engine in which the injection valve heads of fuel for the respective cylinders are connected to a fuel rail in common (see Patent Document 1, for example).

Patent document one

JP-B-60-45751

Problems to be solved by the invention

However, with respect to a case in which the engine is a single cylinder or a case in which the engine is multi-cylinder and fuel is supplied independently to respective cylinders, when the engine directly adopts said conventional fuel supply structure as is, is difficult to ensure reliability when mounting the valves fuel injection and fuel hose.

The invention has been realized in view of such circumstances and an object of the invention is to provide a fuel supply structure to an engine in a vehicle Small in size that can improve reliability when assembling fuel injection valves and a fuel hose when fuel is supplied to a single cylinder engine or when fuel is supplied independently to cylinders respective of the multi-cylinder engine.

Means to solve the problems

To achieve the aforementioned object, the The invention described in claim 1 is characterized in that, in a structure to supply fuel to an engine of a small-sized vehicle in which an intake tube that communicates with an intake hole of the cylinder head is connected to a cylinder head of an engine that is mounted on a vehicle body frame, and an injection valve of fuel that injects fuel into the orifice of intake is mounted on the intake pipe or cylinder head cylinder, the improvement is characterized because a supply connector of fuel that has a connection tube to which it is connected a fuel hose that introduces fuel into the fuel injection valve, is tightly fitted in a fuel injection valve head and connector of fuel supply is fixed to the intake pipe or the cylinder head is inserted between the supply connector of fuel and the intake pipe or cylinder head so that the connecting tube does not rotate.

According to the constitution of the described invention in claim 1, holding the supply connector of fuel that is tightly fitted to the head of the fuel injection valve to the cylinder head or the intake pipe in such a way that the injection valve fuel is sandwiched between the supply connector of fuel and the cylinder head or the intake pipe, is possible to mount the fuel injection valve on the pipe intake or cylinder head setting the relative position of the  fuel injection valve with respect to the orifice of intake and position of fuel holes with respect to the fuel injection valve in fixed positions. By consequently when the fuel is supplied to the engine single cylinder or when fuel is supplied independently to respective cylinders of the multi-cylinder engine, the reliability when mounting the fuel injection valves and the fuel hose

In addition, the invention described in the claim 2 is characterized, in addition to the constitution of the invention described in said claim 1, because one end of a fuel hose holder that extends along of the fuel hose connected to the connecting pipe, it is attached to the intake pipe or cylinder head together with the fuel supply connector by means of a plurality of bolts, and the fuel hose is supported at another end of the fuel hose holder. Due to such a constitution, it is possible to reduce the vibration of the fuel hose to the Once the increase in the number of pieces is avoided.

In addition, the invention described in the claim 3 is characterized, in addition to the constitution of the invention described in said claim 1 or 2, because a front portion of a power unit that is constituted by the engine and a transmission that transmits an engine output to a rear wheel while changing the output speed of the engine and that has the rear wheel pivotally supported on its rear portion, is supported vertically tiltingly in a body frame, and the fuel hose is connected to a fuel tank that is mounted on the frame of vehicle body Due to such a constitution, it is possible tilt the fuel hose together with the power unit and, therefore, it is possible to facilitate the assembly of the valve fuel injection for a small vehicle that is mounted in the vehicle body frame.

Brief description of the drawings

Figure 1 is a side view of a scooter type motorcycle.

Figure 2 is a view in one direction 2 in Figure 1 in a state in which a cover is omitted from vehicle.

Figure 3 is a view in one direction 3 in Figure 2

Figure 4 is an enlarged view of a part essential in figure 2.

Figure 5 is a side view with a part cut off a fuel hose.

Figure 6 is a sectional side view longitudinal transverse showing a mounting portion of a fuel injection valve in an intake pipe in a expanded form.

Figure 7 is a view as seen in the direction of an arrow 9 represented in figure 6.

Description of the numbers and reference signs

11: vehicle body frame, 29: tube intake, 30: cylinder head, 31: intake hole, 32: fuel injection valve, 33: supply connector fuel, 33a: connecting pipe, 68: fuel tank, 79: fuel hose, 83: hose support fuel, 98: bolt, E: engine, M: transmission, P: drive power, WR: rear wheel.

Method of implementing the invention

The mode for practicing the invention it is explained based on an embodiment of the invention shown in The attached drawings.

Figures 1 to 7 are views showing a embodiment of the invention, where Figure 1 is a side view of a scooter type motorcycle, figure 2 is a view according to go in the direction of an arrow 2 in figure 1 in a state in which omits a vehicle body cover, figure 3 it is a view as seen in the direction of an arrow 3 in the Figure 2, Figure 4 is an enlarged view of an essential part represented in figure 2, figure 5 is a side view with a cut part of a fuel hose, figure 6 is a longitudinal cross-sectional side view showing in an enlarged way a mounting portion of a valve fuel injection into an intake pipe, and figure 7 is a view as seen in the direction of arrow 9 in the figure 6.

First of all, in figure 1 and figure 2, a vehicle body frame 11 of a motorcycle type scooter that constitutes a small-sized vehicle, includes a descending tube 14 extending back and down a front tube 13 supporting a front fork 12 which rotatably supports a front wheel WF in an airship way, a upper tube 15 extending back and down a upper portion of the descending tube 14 with an angle of inclination that is less pronounced than an inclination angle of the downstream tube 14, a pair of left rear tubes and right 16, 16 that have their front end portions connected to rear end portions of the upper tube 15, it extend back and up, and have their ends rear connected to each other, and a pair of lower tubes left and right 17, 17 that have their end portions front connected to lower end portions of the tube descending 14 and its rear ends connected to portions intermediates of both rear tubes 16, 16. In the constitution above, both lower tubes 17, 17 are curved approximately U-shaped that opens up in a view side.

In an intermediate portion in the direction towards front-back of the body frame of vehicle 11, a front portion of a power unit P that it is constituted by a single cylinder engine E that is arranged in front of the rear wheel WR while the axle of its cylinder leans rising forward and a transmission continuously variable M that continuously changes an output of the E motor and transmits the output to a rear wheel WR, it is supported vertically tilting. WR rear wheel is supported rotatably in a rear portion of the power unit P. A rear shock absorber unit 20 is disposed between a rear end portion of vehicle body frame 11 and the power unit P.

With further reference to figure 3, brackets upper 21 \ cdot \ cdot \ cdot are fixedly mounted, respectively, in the portions where the rear tubes 16, 16 and the lower tubes 17, 17 are connected to each other. For other part, in an upper portion of a crankcase 22 in the engine E, a pair of lower left and right brackets 23 \ cdot \ cdot \ cdot are fixedly mounted. Both brackets lower mentioned above 23 \ cdot \ cdot \ cdot are supported by tilting shape on a swinging support point SP of a support of motor suspension 24 which has its two end portions pivotally supported on the upper supports 21 i.e. an upper portion of the crankcase 22 in the engine E constituting a front portion of the power unit P is supported so tilting on the vehicle body frame 11.

With reference to figure 4, on the side left of the rear wheel WR and above the transmission continuously variable M, an air filter 25 is provided which It is supported by continuously variable transmission M. The air purified by the air filter 25 connects to a device throttle body 27 by means of a connection tube 26. The throttle body device 27 is connected to one end located upstream of the intake pipe 29 that is curved approximately U-shaped by means of an elastic sleeve of connection made of rubber 28. One end located down a intake pipe 29 is connected to cylinder head 30 of such that the downward end of the intake pipe 29 communicate with an intake hole 31 that forms in the cylinder head 30 in an approximately central portion at length of the left and right direction of the E motor.

In addition, a lower portion of the valve fuel injection 32 that injects fuel into the intake hole 31 is mounted on an upper portion of the intake pipe 29. Fuel injection valve 32 is sandwiched between a fuel supply connector 33 which is fixed to the intake tube 29 such that the fuel supply connector 33 communicate with the valve fuel injection 32 and the intake pipe 29.

An artichoke 77 and a fuel pump 78 that pumps the fuel into the fuel tank 68 through the artichoke 77 they are housed in the warehouse of fuel 68 where a fuel hose 79 that has a end connected to fuel pump 78 has another end connected to the fuel injection valve 32 by means of the fuel supply connector 33.

In this way, adopting the structure in the that the fuel pump 78 is incorporated into the fuel tank fuel 68 mounted on the front portion of the frame vehicle body 11 in the remote position of the engine E and is prevents the mounting of the fuel pump 78 in the unit P power, it is possible to achieve the miniaturization of the unit P power and improved mounting property of the unit power P.

A first clamp 80 that grabs a portion  intermediate fuel hose 79, is fixed to the vehicle body frame 11. In this embodiment, the first clamp 80 is fixed to a support plate 81 which is mounted on a front portion of the rear tube 16 which is placed on the left side in a state in which the tube rear 16 is directed forward in the forward direction of the motorcycle of a pair of left and right rear tubes 16, 16. In addition, the fuel hose 79 is arranged in shape. curved to the right side of the body frame of vehicle 11 between the fuel injection valve 32 and the first clamp 80, while a second clamp 82 that grab a portion of the fuel hose 79 near the engine E, is fixed to the side of the engine E in a state in which the second clamp 82 is fixed to a hose holder of fuel 83.

In this way, the first clamp 80 that grab the intermediate portion of the fuel hose 79, it's  attached to the vehicle body frame 11 and the hose fuel 79 is arranged curved to the right side of the vehicle body frame 11 between the injection valve of fuel 32 attached to the engine E and the first clamp 80. By consequently, in response to the vertical tilting movement of the power unit P, the fuel hose portion 79 between the first clamp 80 and the motor E twists and, therefore Therefore, it is possible to avoid the generation of deformation by flexion of fuel hose 79 due to tilting vertical of the power unit P. Since the resistance of the fuel hose 79 against torsion is greater than the resistance of the fuel hose 79 against bending, the Durability of the fuel hose 79 can be improved in comparison with the fuel hose 79 that receives the bending deformation

In addition, the second clamp 82 that grabs the portion of the fuel hose 79 near the engine E, is attached to the side of the engine E and the fuel hose 79 is arranged curved on the right side of the frame vehicle body 11 between the first and second clamps 80, 82. Therefore, with the use of the second clamp 82, it is possible to improve the accuracy of the curved arrangement of the fuel hose 79 to the right side of the frame vehicle body 11 and, at the same time, it is possible to avoid the bending deformation generation in the fuel hose 79 in a connection portion where the fuel hose 79 It is connected to the fuel injection valve 32.

As shown in Figure 5, the hose of fuel 79 is, for example, of a high multilayer type pressure that is constituted by an inner layer portion 79a which is made of fluorocaucho, a portion of intermediate layer 79b that It is made of nitrile rubber and covers the inner layer portion 79a, a portion of 79c mesh that is made of polyester and covers the intermediate layer portion 79b, and an outer layer portion 79d It is made of hydrin rubber. One end of the hose fuel 79 is attached to a connector 84 that is connected to the fuel pump 78 where the hose joint of Fuel 79 to connector 84 is maintained by a first clip 85. In addition, another end of the fuel hose 79 is attached to the fuel supply connector 33 that is connected to the fuel injection valve 32 where the union of the fuel hose 79 to the fuel supply connector 33 is held by a second clip 86.

Forming the fuel hose 79 as the high pressure multilayer type hose, the resistance of the fuel hose 79 can be increased thus contributing to improving the durability of the fuel hose 79 which Enter the fuel at the given pressure.

Here, the fuel hose 79 is covered with a protective hose 87 that is made of, for example, rubber ethylene propylene where the fuel hose 79 that is in a state of connection to the fuel supply connector 33 by the second clip 86, it is inserted into the protective hose 87 from its end side, and one end of the hose from fuel 79 protruding from protective hose 87 is connected to connector 84 by the first clip 85.

The first clamp 80 is configured in such a way so that a portion of mounting plate 89 is connected integrally to a cylindrical portion 88, where a damper cylindrical rubber 90 having tabs 90a, 90a that are put on contact with both ends of the cylindrical portion 88 in its two ends, is mounted on cylindrical portion 88 in such a way that the rubber damper 90 penetrates the cylindrical portion 88. Here, letting the protective hose 87 covering the fuel hose 79 pass through the rubber damper  90, the fuel hose 79 can be grasped by the first clamp 80. Next, a bolt 92 to hold the first clamp 80 to vehicle body frame 11 is introduced in an introduction hole 91 formed in the sheet portion of assembly 89.

The second clamp 82 has the same constitution that the first clamp 80 where the hose of fuel 79 is seized by the second clamp 82 by means of a rubber shock absorber 90 and a protective hose 87 and the second clamp 82 is fixed to the hose holder of fuel 83 by bolt 93.

In addition, the first and second clamps 80, 82 are distributed on both left and right sides of a vehicle body center line BC that extends in the forward-facing direction. The fuel hose 79 and the protective hose 87 between the first and second clamps 80, 82 are arranged so that they extend on the same side in the left and right direction of the vehicle body frame 11 with respect to both clamps 80, 82 , that is, to the right side in a state in which the viewing direction is directed to the front in the forward direction of the motorcycle in this embodiment. That is, the fuel hose 79 between the first and second clamps 80, 82 is arranged so that it curves so that the fuel hose 79 is bulged to the right side of the vehicle body frame 11. Accordingly, it is possible to place a section of the fuel hose 79 between the first and second clamps 80, 82 at a relatively large value and, therefore, the application of a bending load to the fuel hose 79 can be safely avoided, so it can be improved
plus the durability of the fuel hose 79.

In addition, the engine E is supported on the frame of vehicle body 11 such that the position approximately motor center E in the left direction and right, that is, the disposition position of the valve fuel injection 32 is diverted to the same side as the first clamp 80 of the body center line of BC vehicle, that is, to the left side of the center line of BC vehicle body. Due to such an arrangement, it is possible advantageously guarantee the hose tilt section of fuel 79.

In Figure 6, the intake tube 29 is formed approximately C-shaped curved so that the tube of intake 29 connect the throttle body device 27 and the cylinder head 30 arranged below the body device of throttle 27. An elastic connecting sleeve 28 that has its end up tightly fitted in one portion down connection tube 36a formed in body 36 in the throttle body device 27, it has its end located down tightly fitted at one end located up the intake tube 29 while the state of connection of the elastic connection sleeve 28 to the body 36 and the intake tube 29 is held by holding a third clamp 94 surrounding the elastic connection sleeve 28. That is, the body 36 on the throttle body device 37 is connected to the cylinder head 30 by means of the elastic connecting sleeve 28 and the intake tube 29.

With reference to figure 7, the valve fuel injection 32 that injects fuel into the intake hole 31 of cylinder head 30, is mounted in the intake pipe 29. The opening / closing operation of the fuel injection valve 32 is controlled by a unit of control 42 that is housed and fixed inside a box of control 43 mounted on the body 36 of the body device of throttle 27. Here, an external coupler 95 is connected to a wire harness 52a that branches or branches from the harness cables 52 that hold the load lines 51 \ cdot \ cdot \ cdot connected to the control unit 42, and the external coupler 95 it is mounted on a coupler portion 32a formed in the valve fuel injection 32.

A mounting hole 96 that opens towards the Cylinder head side 30 is formed in the intake pipe 29  and a distal end portion of the injection valve of fuel 32 is tightly fitted in the hole of assembly 96 such that the distal end portion faces the inside the intake tube 29. In addition, a connection tube 33a to which the fuel hose 79 is connected, is formed integrally in an injection valve head of fuel 32 and, at the same time, to the supply connector of fuel 33 that is made of synthetic resin is embedded tightly in the head portion of the injection valve of fuel 32 such that the connecting pipe 33a communicate with the inside of the fuel injection valve 32

In addition, the fuel supply connector 33 is provided with a lowered portion of hitch 97 with which a hitch projection 32b formed in the valve is engaged fuel injection 32. Making the hitch protrusion 32b hitch with the lowered hitch portion 97 and fitting the fuel supply connector 33 on the valve head fuel injection 32, the circumferential direction of the fuel injection valve 32 with respect to the tube Connection 33a is set to a fixed value.

Fuel hose holder 83 is such that the fuel hose holder 83 is  extend along the fuel hose 79 that is connected to the connecting tube 33a of the supply connector fuel 33, where one end of the hose holder of fuel 83 is attached to the intake pipe 29 together with the fuel supply connector 33 for a plurality, for example, a pair of bolts 98, 98. That is, a portion of support 33b integrally in the supply connector of fuel 33 such that the support portion 33b is interposed between a protruding portion 29a that is formed integrally in the intake tube 29 in an outstanding manner that extends parallel to the fuel injection valve 32 which has its distal end portion embedded in the hole of assembly 96 and one end of the fuel hose holder 83, while a pair of rings made of metal 99, 99 are attached to the support portion 33 by molding. Here, although bolts 98, 98 that are inserted into one end of the hose holder of fuel 83 and both rings mentioned above 99, 99 are screwed into the protruding portion 29a, a clip 101 that engages with a hook groove 100 formed on an outer periphery of the fuel injection valve 32 and determines the position in the axial direction of the fuel injection valve 32 is sandwiched between the support portion 33b and the portion outgoing 29a.

Here, the support portion 33b is formed integrally in the fuel supply connector 33 of such so that the support portion 33b extends into a position  circumferentially displaced from the connecting tube 33a and one side opposite a coupler portion 32a of the injection valve of fuel 32. Determining the clamping position of the fuel supply connector 33 to the intake pipe 29 of in this way, the degree of freedom can be increased with respect at the disposition of the load line connection portion to the fuel injection valve 32 and the connecting portion of the fuel hose 79.

Holding the supply connector of fuel 33 and one end of the fuel hose holder 83 together with the intake pipe 29 of the form before indicated, the circumferential position of the injection valve of fuel 32 with respect to the connecting tube 33a of the connector Fuel supply 33 can be put in a fixed position (does not rotate) and the position of the fuel injection valve 32 with respect to the intake hole 31 of the cylinder head 30 can be put in a fixed position, so that the valve fuel injection 32 can be inserted between the connector of fuel supply 33 and the intake pipe 29.

From both side portions of the support fuel hose 83, on the side portion in front of the fuel injection valve 32, between wire harness 52 a heat shield wall 83a is interposed that communicates with the control unit 42 of the throttle body device 27 and the engine E, where the heat shield wall 83a is connected to the fuel hose holder 83 integrally and at an approximately right angle to prevent heat irradiated from the engine and adversely influences the harness 52

The second clamp 82 that supports the hose of fuel 79 is fixed to another end of the support of fuel hose 83 using bolt 83 and therefore the fuel hose 79 is supported on another end of the bracket of fuel hose 83.

Next, to explain how operation of this embodiment, the supply connector of fuel 33 that has the connecting tube 33a to which it is connected the fuel hose 79 to insert the fuel in fuel injection valve 32, is tightly fitted to the head of the injection valve fuel 32 such that the circumferential position of the fuel injection valve 32 with respect to the tube connection 33a is put in the fixed position, and to the connector fuel supply 33 is fixed to the intake pipe 29 of such that the fuel injection valve 32 is sandwiched between the fuel supply connector 33 and the intake pipe 29 while positioning the connector of fuel supply 33 with respect to the orifice of admission 31 in a fixed position. Therefore, holding the fuel supply connector 33 to the intake pipe 29, is possible to mount the fuel injection valve 32 on the tube intake 29 setting the relative position of the valve fuel injection with respect to the intake port 31 and the position of the fuel hose 79 with respect to the fuel injection valve 32 in fixed positions, so that the reliability of the injection valve assembly is improved of fuel 32 and fuel hose 79 when supplies the fuel to the single cylinder E engine.

In addition, one end of the hose holder of Fuel 83 is fixed to the intake pipe 29 together with the connector of fuel supply 33 using a pair of bolts 98, 98 and the fuel hose 79 is supported on another end of the bracket of fuel hose 83 and therefore it is possible to reduce the vibration of the fuel hose 79 while avoiding The increase in the number of pieces. In addition, the hose holder of fuel 83 is formed in such a way that the hose holder of fuel 83 extends along the fuel hose 79 which is connected to the connecting tube 33a of the connector fuel supply 33 and therefore it is possible to maintain the fuel hose 79 such that the hose of fuel 79 does not interfere with the coupler portion 32a of the fuel injection valve 32, so that you can increase the degree of freedom of disposition of the portion of coupler 32a.

In addition, although the front portion of the unit of power P including the motor E is supported on the frame of vehicle body 11 vertically tilting, the fuel hose 79 is connected to the fuel tank fuel 68 mounted on vehicle body frame 11 by means of the fuel pump 78 and therefore, it is possible the fuel hose 79 vibrates along with the fuel unit P power, so it is easy to assemble the valve fuel injection 32 on a scooter type motorcycle in the that the engine E is pivotally mounted on the frame of vehicle body 11.

In addition, with respect to the body device of  throttle 27, while throttle drum 39 is fixedly mounted on an end portion of the valve shaft 37, the load lines 51 \ cdot \ cdot \ cdot to connect to the drive control 42 housed in control box 43, are connected to the control box 43 mounted on the body 36 on the opposite side to the throttle drum 39 on the side of the throttle drum 39, and the protective element 53 having the dividing portion 53a that is interposed between load lines 51 \ cdot \ cdot \ cdot and the throttle drum 39, is mounted on the body 36.

Therefore, it is possible to avoid with security than load lines 51 \ cdot \ cdot \ cdot connected to the control box 43 interfere with the drum of throttle 39 and therefore the load lines 51 \ cdot \ cdot \ cdot can be wired as close as possible possible on the side of body 36, so it can be guaranteed easily a wiring space near body 36 and all the throttle body device 27 including the lines of load 51 \ cdot \ cdot \ cdot near body 36 can be mounted in a compact way

In addition, the cable support portion 53b that places and supports an end portion of the external cable 55 in the throttle cable 41 integrally forms in the element protector 53 and, therefore, there is no special provision support element used exclusively for the cable accelerator 41, so that the number of parts can be reduced.

In addition, the coupler portion 49 in which the external coupler 50 communicating with the load lines 51 \ cdot \ cdot is replaceably mounted, is integrally formed in the control box 43 such that the portion of coupler 49 look at the side of the throttle drum 39, and the dividing portion 53a of the protective element 53 is formed such that the dividing portion 53a extends along the mounting direction of the external coupler 50 to the coupler portion 49 plate-shaped Accordingly, it is possible to guide the external coupler 50 through the dividing portion 53a at the time of performing the assembly and disassembly operation of the external coupler 50 with respect to the coupler portion 49 and, therefore, the assembly operation can be facilitated and disassembly of the external coupler 50, whereby the maintenance property can be improved
to.

In addition, although the air filter 25 which is supports in the continuously variable transmission M in the unit of  power P, is connected to cylinder head 30 of engine E by means of the throttle body device 27 and the tube of intake 29, body 36 of the throttle body device 27 is connected to the intake tube 29 which is connected to the cylinder head 30 by means of the elastic connecting sleeve 28, and the throttle body device 27 in which the unit control 42 to carry out a motor operation control E is mounted on body 36, is arranged in front of the point of rocker support SP where the upper portion of the crankcase 22 is Tiltingly supports the body frame of vehicle 11 in engine E of power unit P.

Therefore, letting the cuff elastic connection 28 absorb the vibration that acts on the throttle body device 27 of engine E, it is possible reduce the vibration applied to the control unit 42 mounted on the throttle body device 27. In addition, since the throttle body device 27 is arranged in front of the tilt support point SP, the distance between the cylinder head of cylinder 30 and throttle body device 27 can be make as short as possible, so you can reduce the load acting on the elastic connection sleeve 28 interposed between the throttle body device 27 and the cylinder head of cylinder 30.

In addition, the control unit 42 is arranged outside the body 36 corresponding to the end portion of the valve shaft 37 having its axis arranged so substantially horizontal in the body device of throttle 27, and the lower portion 43a of the control box 43 which houses control unit 42 and is mounted on body 36, it is formed flat so that the lower portion 43a look at engine E in an opposite way from above. By consequently, it is possible to make the volume of the control box 43 be as large as possible and, at the same time, the portion bottom 43a of the control box 43 can be flattened, so the operability of the body device of throttle 27.

Also, since cell motor 63 is disposed in the crankcase 22 behind the tilting support point SP, it is possible to place the control unit 42 and the motor cell 63 as far as possible from a contact surface With motorcycle road scooter type, so it is possible avoid as much as possible that the water splashes of the road surface adversely affect the unit of control 42 and cell motor 63 and, at the same time, arranging the control unit 42 and the cell motor 63 on both sides, is that is, the front and rear sides from the support point swingarm SP, it is possible to avoid as much as possible that the noise of the Cell engine 63 affects control unit 42.

In addition, the throttle cable 41 that is wound  around and connect to the throttle drum 39 which is fixed to the valve shaft 37 on the side opposite control unit 42 and the load lines 51 that are connected to the control unit 42, are arranged so that they extend in the directions opposite each other in their corresponding portions of the device throttle body 27. Therefore, at the time of performing maintenance of the throttle cable 41 and the load lines 51 \ cdot \ cdot \ cdot, it is possible to prevent one of the cable from accelerator 41 and load lines 51 \ cdot \ cdot \ cdot affect to the other of the throttle cable 41 and the load lines 51 \ cdot \ cdot \ cdot so you can improve the property of maintenance of throttle cable 41 and load lines 51 \ cdot \ cdot \ cdot.

Although the embodiment of the invention has been explained above, the invention is not limited to the embodiment mentioned above and you can make several changes of design without departing from the invention described in the claims.

For example, although in the embodiment before the case in which the injection valve of fuel 32 is mounted on the intake tube 29, the invention It is also applicable to a case where the injection valve of fuel 32 is mounted on cylinder head 30. In addition, The invention is also applicable to a case in which the supply of fuel is carried out independently for respective cylinders of the multi-cylinder engine.

In addition, the invention is also applicable to motorcycles other than scooter type motorcycle and a tricycle with motor

Advantage of the invention

As described, according to the described invention in claim 1, fixing the supply connector of fuel to the cylinder head or the intake pipe, is possible to mount the fuel injection valve on the pipe intake or cylinder head setting relative position of the fuel injection valve with respect to the hole intake and fuel hose position with with respect to the fuel injection valve in positions fixed. Therefore, it is possible to improve the reliability of mounting the fuel injection valve and hose fuel when the fuel is supplied to the engine single cylinder or when fuel is supplied independently to respective engine cylinders multi cylinder

In addition, according to the invention described in the claim 2, it is possible to reduce the vibration of the hose fuel while avoiding the increase in the number of pieces.

In addition, according to the invention described in the claim 3, the fuel hose can be tilted together with the power unit and therefore it can be facilitated mounting the fuel injection valve on the vehicle Small in size in which the motor is tilted in the body frame.

Claims (2)

1. A structure to supply fuel to an engine of a small-sized vehicle in which a tube of intake (29) that communicates with an intake hole (31) of the cylinder head (30) is connected to a cylinder head (30) of an engine (E) that is mounted on a body frame vehicle (11), and a fuel injection valve (32) which injects fuel into the intake port (31) is mounted on the intake pipe (29) or cylinder head (30), the improvement being characterized in that a fuel supply connector (33) having a connecting tube (33a) in which a fuel hose (79) connecting fuel into the fuel injection valve (32) is connected, is fitted tightly in a head of the fuel injection valve (32) and the fuel supply connector (33) is fixed to the intake pipe (29) or the cylinder head (30) is inserted between the fuel supply connector (33) and the intake pipe (29) or the cylinder head (30) so that the connecting tube (33a) does not rotate, and where one end of a fuel hose holder (83) extends to along the fuel hose (79) connected to the connecting pipe (33a), it is fixed to the intake pipe (29) or the cylinder head (30) together with the fuel supply connector (33) by means of a plurality of bolts (98), and the fuel hose (79 ) is supported on another end of the fuel hose holder (83). 2. A structure to supply fuel to a motor of a small vehicle according to claim 1, where the front of a power unit (P) that is constituted by the engine (E) and a transmission (M) that transmits one motor output (E) to a rear wheel (WR) at the same time as change the engine output speed (E) and what the wheel has rear (WR) pivotally supported by its rear, it supports vertically tilting on a rack of body (11), and the fuel hose (79) is connected to a fuel tank (68) that is mounted on the frame of vehicle body (11).