JP4154205B2 - Throttle body for motorcycle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motorcycle throttle body, and in particular, a throttle drum that opens and closes an intake passage is disposed in a left-right direction of the motorcycle, and a throttle drum that connects an operation wire to one end of the valve shaft is provided. A throttle sensor that electrically detects the opening of the throttle valve is installed on the opposite side of the throttle drum across the intake passage, and an electromagnetic that injects fuel into the intake passage on one side in the vertical direction of the intake passage The present invention relates to improvement of a fuel tank equipped with a fuel injection valve.
[0002]
[Prior art]
Such a throttle body for a motorcycle is already known as disclosed in, for example, Patent Document 1 below.
[0003]
[Patent Document 1]
JP 2000-297711 A [0004]
[Problems to be solved by the invention]
In a conventional throttle body for a motorcycle, a sensor coupler is integrally provided on one side in the radial direction of the throttle sensor.
[0005]
However, in a motorcycle, many parts are attached and detached from the left and right sides of the vehicle body, but the sensor coupler is disposed on the opposite side of the throttle drum across the intake passage in the same manner as the throttle sensor. In this case, the connection work of the operation wire to the throttle drum and the connection work of the sensor external coupler to the sensor coupler must be performed from both the left and right sides of the motorcycle body, and the assembly and maintenance are good. It can not be said.
[0006]
The present invention has been made in view of such circumstances, and the operation of connecting the operation wire to the throttle drum and the operation of connecting the external coupler for the sensor to the sensor coupler are performed from the same left and right sides of the motorcycle. It is an object of the present invention to provide a motorcycle throttle body that can be carried out by a person and has good assembly and maintenance.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the valve shaft of a throttle valve that opens and closes the intake passage is arranged in the left-right direction of the motorcycle, and a throttle drum that connects an operation wire is attached to one end of the valve shaft. A throttle sensor that electrically detects the opening of the throttle valve is disposed on the opposite side of the throttle drum across the intake passage, and electromagnetics that inject fuel into the intake passage on one side in the vertical direction of the intake passage A throttle body for a motorcycle having a fuel injection valve, wherein the outer surface of the side wall opposite to the throttle drum across the intake passage is a throttle sensor mounting surface to which the throttle sensor is fixed. The sensor coupler is connected to the opposite side of the fuel injection valve across the intake passage and parallel to the valve shaft. Of Sakapura, a connection port to an external coupler sensor so suited to the throttle drum and the same side, and can be connected to an external coupler sensor in the sensor coupler at the throttle drum side of the throttle sensor mounting surface, the fuel injection valve The injection valve coupler connected to the fuel injection valve is arranged closer to the throttle drum side, and the connection work of the external coupler for injection valve to the injection valve coupler is connected to the operation work of connecting the operation wire to the throttle drum and the sensor coupler. The first feature is that the direction of the connection port of the injection valve coupler to the external coupler for injection valves is set so that the external coupler for sensors can be connected from the same side of the motorcycle as in the connection work of the sensor external coupler. .
[0008]
According to this first feature, the operation of connecting the operation wire to the throttle drum and the operation of connecting the sensor external coupler to the sensor coupler can be performed by a single operator from the same side of the motorcycle. In addition, the operation wire and the sensor external coupler can be attached and detached at the time of maintenance by a single operator from the same side of the motorcycle. In addition, the sensor external coupler can be connected to the sensor coupler. At the time of connection, there is no interference with the fuel injection valve, and therefore, assembly and maintenance can be improved. Further, similarly to the above operations, the connection operation of the external coupler for the injection valve to the injection valve coupler can be performed from the same side of the motorcycle, and the assembling property and the maintenance property can be further improved.
[0009]
In addition to the first feature of the present invention, the sensor coupler is integrally connected to a mounting flange fixed to the side wall of the throttle body by a screw member, and the sensor coupler is supported by the mounting flange. This is the second feature.
[0010]
According to the second feature, the mounting flange of the throttle sensor also serves as a support member for the sensor coupler, so that a dedicated mounting member for the sensor coupler is unnecessary, and the structure can be simplified.
[0011]
Furthermore, in addition to the second feature, the third feature of the present invention is that the sensor coupler is disposed close to the screw member.
[0012]
According to the third feature, the rigidity of the base of the sensor coupler is strengthened by the screw member that fixes the mounting flange to the throttle body, and the sensor coupler can sufficiently withstand the insertion / extraction load from the external coupler for the sensor. be able to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.
[0014]
FIG. 1 is a side view of an essential part of a fuel injection engine for a motorcycle according to a first embodiment of the present invention, FIG. 2 is an enlarged side view of a throttle body mounted on the engine, and FIG. FIG. 4 and FIG. 4 show a second embodiment of the present invention and correspond to FIG.
[0015]
In the following description, front and rear and left and right are based on a motorcycle.
[0016]
First, a first embodiment of the present invention shown in FIGS. 1 to 3 will be described.
[0017]
In FIG. 1, a fuel injection engine E mounted on a motorcycle body has a single-cylinder cylinder block 2 projecting from a crankcase 1 tilted forward, and a cylinder head coupled to the upper end of the cylinder block 2. The throttle body 5 of the present invention is attached to 3 via an intake pipe 4.
[0018]
As shown in FIGS. 2 and 3, the throttle body 5 has an intake passage 10 that is continuous with the inside of the intake pipe 4 and extends in the front-rear direction of the motorcycle, and is a butterfly type disposed at an intermediate portion of the intake passage 10. The throttle valve 11 is supported by a valve shaft 12 that penetrates the throttle body 5 and is disposed in the left-right direction of the motorcycle. Therefore, the throttle valve 11 can be opened and closed by rotating the valve shaft 12.
[0019]
A throttle drum 14 to which an operation wire 13 to be pulled by a motorcycle user is connected and wound is fixed to one end portion (right end portion in the illustrated example) of the valve shaft 12. Is connected to a return spring 15 for urging the throttle valve 11 in the closing direction of the throttle valve 11. The throttle drum 14 thus connected to the valve shaft 12 rotates in the opening direction of the throttle valve 11 by pulling the operation wire 13, and can rotate in the closing direction of the throttle valve 11 with the biasing force of the return spring 15.
[0020]
A throttle sensor 17 that electrically detects the opening of the throttle valve 11 is disposed at the other end of the valve shaft 12 opposite to the throttle drum 14. The circular sensor housing 18 of the throttle sensor 17 has a mounting flange 18a extending radially outward. The mounting flange 18a is located on the opposite side of the throttle body 14 from the throttle drum 14 with the intake passage 10 in between. A pair of upper and lower screw members 19 and 20 are fixed to the outer surface of the side wall, so that the outer surface of the side wall of the throttle body 5 becomes a throttle sensor mounting surface.
[0021]
A sensor coupler 21 disposed on the lower side of the throttle body 5 is integrally connected to the mounting flange 18a around the lower screw member 20. As apparent from FIG. 3, the sensor coupler 21 is disposed so as to be parallel to the valve shaft 12. Thus, the sensor coupler 21 is supported by the mounting flange 18a. Reinforcing ribs 22 following the mounting flange 18a are integrally projected on the back surface of the sensor coupler 21.
[0022]
In the sensor coupler 21, a connection terminal 23 connected to a conductor inside the throttle sensor 17 is exposed to a connection port 24, and the connection port 24 faces the right side on the same side as the throttle drum 14. Therefore, the sensor coupler 21 is connected to the sensor external coupler 25 from the right side of the throttle body 5 and closer to the throttle drum 14 than the throttle sensor mounting surface. The opening degree of the valve 11 is output as a signal to a control unit (not shown) via the sensor coupler 21 and the sensor external coupler 25.
[0023]
An electromagnetic fuel injection valve 27 is disposed on the side opposite to the sensor coupler 21 across the intake passage 10, that is, on the upper side of the throttle body 5. The fuel injection valve 27 is located downstream of the intake passage 10 when the valve is opened. Inject fuel toward. The fuel injection valve 27 is held by an injection valve holder 29 fixed to the throttle body 5 by a screw member 28. The injection valve holder 29 has a fuel introduction connecting pipe 34 protruding from the upper end surface, to which a high pressure fuel pipe 35 connected to a discharge port of a fuel pump (not shown) is connected.
[0024]
An injection valve coupler 30 is provided on the fuel injection valve 27 so as to project integrally from the fuel injection valve 27 toward the throttle drum 14. In the injection valve coupler 30, a connection terminal 31 connected to an electromagnetic coil in the fuel injection valve 27 is exposed to a connection port 32. An injection valve external coupler 33 is connected to the connection port 32, and a control unit (not shown). The valve opening signal for the fuel injection valve 27 is sent through the injection valve coupler 30 and the injection valve external coupler 33.
[0025]
Next, the operation of the first embodiment will be described.
[0026]
Since the connection port 24 of the sensor coupler 21 faces the same side as the throttle drum 14, the connection of the operation wire 13 to the throttle drum 14 of the throttle body 5 attached to the engine E in the motorcycle assembly line. The work and the connection work of the sensor external coupler 25 to the sensor coupler 21 can be performed by one worker from the same side of the motorcycle, and the operation wire 13 and the external coupler 25 are attached and detached during maintenance. Can also be performed by one worker from the same side of the motorcycle. Moreover, since the sensor coupler 21 is disposed on the opposite side of the fuel injection valve 27 with the intake passage 10 interposed therebetween, the fuel injection valve 27 is obstructed when the sensor external coupler 25 is connected to the sensor coupler 21. There is no. Therefore, it is possible to improve assemblability and maintainability.
[0027]
Further, the sensor coupler 21 is formed integrally with the throttle body 5 so as to be supported by the mounting flange 18a of the throttle sensor 17 although it is disposed at a location different from the throttle sensor 17 in the throttle body 5. Therefore, a mounting member dedicated to the sensor coupler 21 is not necessary, which can contribute to simplification of the structure.
[0028]
In addition, since the sensor coupler 21 is integrated with the mounting flange 18 a in the vicinity of the lower screw member 20 that fixes the mounting flange 18 a to the throttle body 5, the base rigidity of the sensor coupler 21 is the lower screw member 20. In addition, the rigidity of the back surface of the sensor coupler 21 is strengthened by the reinforcing rib 22, so that the sensor coupler 21 can sufficiently withstand the insertion / removal load from the sensor external coupler 25.
[0029]
Further, since the injection valve coupler 30 is also arranged closer to the throttle drum 14 than the fuel injection valve 27, an external coupler for injection valve from the same side of the motorcycle to the injection valve coupler 30 is the same as in the above operations. 33 connection work can be performed, and further improvement of assemblability and maintainability can be achieved.
[0030]
Next, a second embodiment of the present invention shown in FIG. 4 will be described.
[0031]
In the second embodiment, the connection port 32 of the injection valve coupler 30 is directed to the same side as the throttle drum 14 in the same manner as the sensor coupler 21, and the other configurations are the same as in the previous embodiment. Therefore, in FIG. 4, portions corresponding to those of the previous embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0032]
According to the second embodiment, by the insertion and removal direction of the sensor for external coupler 25 to the sensor coupler 21, the insertion and removal direction of the injection valve for the external coupler 33 for injector coupler 30 is parallel, Solo their insertion and removal work It is possible to perform these operations simultaneously, and the assemblability and maintainability can be further improved.
[0033]
The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, contrary to the above embodiment, the throttle drum 14 can be disposed on the left side of the throttle body 5 and the throttle sensor 17 can be disposed on the right side thereof. A sensor coupler 21 can be disposed above the throttle body 5 and a fuel injection valve 27 can be disposed below the sensor coupler 21.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, the throttle valve shaft that opens and closes the intake passage is arranged in the left-right direction of the motorcycle, and the operation wire is connected to one end of the valve shaft. A drum sensor is installed, and a throttle sensor that electrically detects the opening of the throttle valve is arranged on the opposite side of the throttle drum across the intake passage, and fuel is supplied to the intake passage on one side in the vertical direction of the intake passage. In a motorcycle fuel injection engine throttle body having an electromagnetic fuel injection valve for injection, a sensor coupler connected to the throttle sensor is arranged on the opposite side of the fuel injection valve across the intake passage and parallel to the valve shaft. Since the connection port of this sensor coupler is directed to the same side as the throttle drum, the operation of connecting the operation wire to the throttle drum, A connecting work of the external coupler sensor to Nsakapura is from the same side of the motorcycle can be carried out by one worker, also desorption operations of the operating wire and the external coupler sensor during maintenance, motorcycle In addition, when connecting the sensor external coupler to the sensor coupler, there is no interference with the fuel injection valve. Maintenance can be improved. Furthermore, the injection valve coupler connected to the fuel injection valve is arranged closer to the throttle drum side than the fuel injection valve , and the connection work of the external coupler for injection valve to the injection valve coupler is connected to the operation wire to the throttle drum. Since the direction of the connection port of the injection valve coupler with the external coupler for injection valves is set so that it can be performed from the same side of the motorcycle as in the connection work of the sensor external coupler to the sensor coupler, Similarly to the work, the connection work of the external coupler for the injection valve to the injection valve coupler can be performed from the same side of the motorcycle, and the assembly and maintenance can be further improved.
[0035]
Further, according to the second feature of the present invention, in addition to the first feature, the sensor coupler is integrally connected to the attachment flange fixed to the side wall of the throttle body by a screw member in addition to the first feature, and the attachment is performed. Since the sensor coupler is supported on the flange, the mounting flange of the throttle sensor also serves as a support member of the sensor coupler, and a mounting member dedicated to the sensor coupler is unnecessary, and the structure can be simplified.
[0036]
Furthermore, according to the third feature of the present invention, in addition to the second feature, since the sensor coupler is arranged close to the screw member, the rigidity of the base of the sensor coupler is secured to the throttle body. Therefore, the sensor coupler can sufficiently withstand the insertion / removal load from the sensor external coupler.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part of a fuel injection engine for a motorcycle according to a first embodiment of the present invention. FIG. 2 is an enlarged side view of a throttle body mounted on the engine. FIG. 4 is a diagram corresponding to FIG. 3, showing a second embodiment of the present invention.
5 ... Throttle body 10 ... Intake passage 11 ... Throttle valve 12 ... Valve shaft 13 ... Operating wire 14 ... Throttle drum 17 ... Throttle sensor 18a ... Mounting flange 20 ... Screw member 21 ... Sensor coupler 24 ... Sensor coupler connection port 25 ... Sensor external coupler 27 ... Fuel injection valve 30 ... ..Injection valve coupler
32... Injection valve coupler connection port
33... External coupler for injection valve

Claims (3)

The throttle shaft (12) of the throttle valve (11) that opens and closes the intake passage (10) is arranged in the left-right direction of the motorcycle, and the throttle wire that connects the operation wire (13) to one end of the valve shaft (12) A drum sensor (17) is mounted, and a throttle sensor (17) for electrically detecting the opening of the throttle valve (11) is disposed on the opposite side of the throttle drum (14) across the intake passage (10). A throttle body for a motorcycle, in which an electromagnetic fuel injection valve (27) for injecting fuel into the intake passage (10) is disposed on one side in the vertical direction of the intake passage (10),
The side wall outer surface opposite to the throttle drum (14) across the intake passage (10) is a throttle sensor mounting surface to which the throttle sensor (17) is fixed.
A sensor coupler (21) connected to the throttle sensor (17) is disposed on the opposite side of the fuel injection valve (27) across the intake passage (10) and parallel to the valve shaft (12). The connection port (24) of the sensor coupler (21) to the sensor external coupler (25) is directed to the same side as the throttle drum (14), and the sensor coupler (21) is connected to the sensor external coupler (21). 25) can be connected to the throttle drum (14) side from the throttle sensor mounting surface,
An injection valve coupler (30) connected to the fuel injection valve (27) is disposed closer to the throttle drum (14) side than the fuel injection valve (27) , and an external coupler for injection valve to the injection valve coupler (30) Similar to the connection work of the operation wire (13) to the throttle drum (14) and the connection work of the sensor external coupler (25) to the sensor coupler (21), the connection work of (33) is the same side of the motorcycle. A throttle body for a motorcycle, wherein the direction of the connection port (32) of the injection valve coupler (30) with the external coupler for injection valve (33) is set so as to be able to perform from The throttle body for a motorcycle according to claim 1,
A sensor coupler (21) is integrally connected to a mounting flange (18a) fixed to the side wall of the throttle body (5) of the throttle sensor (17) by a screw member (20), and is attached to the mounting flange (18a). A throttle body for a motorcycle, wherein the sensor coupler (21) is supported. The throttle body for a motorcycle according to claim 2,
A throttle body for a motorcycle, wherein a sensor coupler (21) is disposed close to the screw member (20).

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