JP2013124614A - Intake control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake control device capable of improving the operability of an accelerator operating part and enhancing the detection accuracy of an accelerator position sensor.SOLUTION: The intake control device includes: an air cleaner (41) disposed above an engine (8); a pair of right-and-left intake ducts (43) projecting toward the front of a vehicle body from the air cleaner (41) to take an outdoor air into the air cleaner (41); and a sensor unit (45) which is coupled to a throttle cable (452) extended from a throttle grip and detects an operation amount of an accelerator. The sensor unit (45) is disposed in the air cleaner (41) between the openings (431) of the pair of right-and-left intake ducts (43) formed in the air cleaner (41).

Description

  The present invention relates to a motorcycle intake control device, and more particularly to an intake control device that electronically controls an intake air amount of an engine.

  Conventionally, an intake control device in which an accelerator position sensor is arranged on a throttle body is known (see, for example, Patent Document 1). In the throttle body described in Patent Document 1, a valve shaft that rotatably supports the throttle valve is provided, and a sensor unit is provided adjacent to the valve shaft. The sensor unit is provided with a throttle pulley connected to an accelerator operation unit via a throttle cable, and an accelerator position sensor for detecting an operation amount of the accelerator operation unit.

  In this sensor unit, the throttle pulley rotates in conjunction with the operation of the accelerator operation unit, and the rotation of the throttle pulley is detected as the operation amount of the accelerator operation unit by the accelerator position sensor. The operation amount of the accelerator operation unit is output from an accelerator position sensor to an ECU (Electronic Control Unit), and the throttle valve opening is calculated in the ECU. The intake air of the engine is electrically controlled by driving the electric motor connected to the valve shaft under the control of the ECU and adjusting the opening of the throttle valve.

JP 2006-336638 A

  However, in the intake control device described in Patent Document 1, the throttle body is provided in the cylinder head, and the sensor unit is disposed in a high-temperature atmosphere near the cylinder head. For this reason, there has been a problem that the detection error becomes large due to the influence of the temperature characteristic of the accelerator position sensor. In addition, it is necessary to extend the cable from the accelerator operation section to the throttle body (throttle pulley) of the engine, and the throttle cable becomes longer, which may adversely affect the operability of the accelerator operation section.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an intake control device that can improve the operability of an accelerator operation unit and increase the detection accuracy of an accelerator position sensor.

  An intake control device according to the present invention is an intake control device that controls an intake air amount of an engine by opening and closing a throttle valve in accordance with an operation amount of an accelerator operation unit. A pair of left and right intake ducts projecting from the air cleaner toward the front of the vehicle body, and a throttle cable extending from the accelerator operating section, so as to take in outside air into the air cleaner, A sensor unit that detects an operation amount of the accelerator operation unit, and the sensor unit is disposed in the air cleaner between openings of the pair of left and right intake ducts formed in the air cleaner. And

  According to this configuration, the sensor unit is disposed between the opening of the pair of left and right intake ducts in the air cleaner, so that the ambient temperature around the sensor unit is relatively low due to the outside air flowing into the air cleaner from the intake duct. Maintained. For this reason, the detection accuracy by the sensor unit is improved, and the intake air amount of the engine is appropriately controlled by opening and closing the throttle valve according to the operation amount of the accelerator operation unit. Further, since the sensor unit is provided above the engine, the throttle cable connected to the sensor unit from the accelerator operation unit can be shortened, and the operation resistance acting on the throttle cable can be reduced to improve the operability of the accelerator operation unit. Further, since the sensor unit is disposed in the air cleaner, adhesion of foreign matters such as water droplets and dust to the sensor unit is suppressed, and further, the sensor unit is protected from external impact.

  Further, in the intake control device of the present invention, a filter is provided in the air cleaner so as to partition the air cleaner into an upstream dirty side in the intake flow direction and a clean side downstream in the intake flow direction, The sensor unit is disposed on the dirty side. According to this configuration, the sensor unit can be effectively cooled on the upstream side in the intake flow direction away from the heat source such as the engine.

  Further, in the above intake control device of the present invention, the sensor unit is disposed so as to overlap a vehicle body center line extending in the vehicle longitudinal direction in a top view. According to this configuration, the weight balance of the vehicle body can be made evenly close in the vehicle body width direction, and the steering stability can be improved.

  In the intake control device of the present invention, the air cleaner is provided with a plurality of outside air intakes for taking outside air into the engine, and the sensor unit is arranged in the vehicle width direction of the plurality of outside air intakes. It is arranged so as to overlap a width center line extending in the longitudinal direction of the vehicle body through the width center when viewed from above. According to this configuration, the side surface of the sensor unit can function as a rectifying plate, a left and right intake air flow can be created in the air cleaner, and the outside air can be uniformly fed into the plurality of outside air intakes.

  In the above intake control device of the present invention, the sensor unit includes a throttle pulley that rotates in conjunction with an operation of the accelerator operation unit via the throttle cable, and the accelerator operation unit according to a rotation amount of the throttle pulley. And an accelerator position sensor for detecting the operation amount of the throttle cable, and the throttle cable extends forward from the throttle pulley. According to this configuration, when the accelerator operation unit is disposed in front of the vehicle body, the throttle pulley and the accelerator operation unit can be connected without causing a sharp bend in the throttle cable. In addition, since the throttle cable is extended from the throttle pulley toward the accelerator operation unit, the throttle cable can be shortened. Therefore, by gently bending the throttle cable and shortening the cable length, it is possible to reduce the operating resistance acting on the throttle cable and improve the operability of the accelerator operating portion.

  In the intake control device of the present invention, a pair of rectifying plates for rectifying the intake air flow in the air cleaner is provided in the air cleaner between the sensor unit and the openings of the pair of left and right intake ducts. According to this configuration, since the intake air flow in the air cleaner is effectively rectified by the rectifying plate, an increase in pressure loss due to the turbulence of the intake air is suppressed even when the flow velocity increases in the high engine speed range.

  In the above intake control device of the present invention, the sensor unit is arranged at a position higher than the bottom surface in the air cleaner. According to this configuration, even if rainwater enters the air cleaner from the intake duct, the sensor unit can be separated from the rainwater accumulated on the lowest surface in the air cleaner.

  According to the intake control device of the present invention, the operability of the accelerator operation unit can be improved, and the detection accuracy of the accelerator position sensor can be increased.

1 is a left side view of a motorcycle according to the present embodiment. It is a left view of the air cleaner periphery which concerns on this Embodiment. It is a front view of the air cleaner periphery which concerns on this Embodiment. It is a top view of the air cleaner periphery which concerns on this Embodiment. It is a perspective view of the air cleaner concerning this embodiment. It is the top view which removed the air cleaner cover from the air cleaner which concerns on this Embodiment. It is sectional drawing of the periphery of the intake control device which concerns on this Embodiment. It is a top view of the periphery of the intake control device according to the present embodiment. It is a figure which shows an example which rain water entered into the air cleaner which concerns on this Embodiment. It is explanatory drawing of the rectification | straightening structure in the air cleaner which concerns on this Embodiment. It is explanatory drawing of the rectification | straightening structure of the air cleaner which concerns on a modification. It is explanatory drawing of the rectification | straightening structure of the air cleaner which concerns on another modification.

  Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. In the following, an example in which the intake control device of the present invention is applied to an on-road type motorcycle will be described, but the present invention is not limited to this and can be changed as appropriate. For example, the intake control device of the present invention can be applied to other types of motorcycles and other transport machines that use electronically controlled throttle bodies.

  With reference to FIGS. 1 to 4, a schematic configuration of the entire motorcycle 1 according to the present embodiment will be described. FIG. 1 is a left side view of a motorcycle 1 according to the present embodiment. FIG. 2 is a left side view around the air cleaner 41 according to the present embodiment. FIG. 3 is a front view of the periphery of the air cleaner 41 according to the present embodiment. FIG. 4 is a top view around the air cleaner 41 according to the present embodiment. 1 to 4, the front of the vehicle is indicated by an arrow FR, the rear of the vehicle is indicated by an arrow RE, the left side of the vehicle is indicated by L, and the right side of the vehicle is indicated by R. 2 to 4 show the engine by a two-dot chain line for convenience of explanation.

  As shown in FIGS. 1 to 4, the motorcycle 1 includes a body frame 2 made of steel or aluminum alloy on which components such as a power unit and an electrical system are mounted. The main frame 21 of the vehicle body frame 2 branches leftward and rightward from the head pipe 22 located at the front end portion, and extends obliquely downward. A swing arm bracket 23 extends downward from the rear end side of the main frame 21. An engine suspension bracket 24 extends substantially downward from the front end side of the main frame 21. A lower end portion of the engine suspension bracket 24 is connected to a substantially middle portion of the main frame 21.

  The engine 8 is mounted below the main frame 21 so as to be suspended by the engine suspension bracket 24 and the swing arm bracket 23. A radiator 31 is disposed in front of the engine 8, and a radiator heat guard (not shown) is interposed between the radiator 31 and the engine 8. An air cleaner 41 is disposed above the engine 8 so as to be sandwiched between the left and right main frames 21. A pair of left and right intake ducts 43 project from the air cleaner 41 toward the front of the vehicle body and are inserted into an opening 25 formed on the front end side of the vehicle body frame 2.

  A fuel tank 32 is disposed on the air cleaner 41. A rider seat 33 a and a pillion seat 33 b are connected to the rear of the fuel tank 32. The rider seat 33a and the pillion seat 33b are supported by a pair of left and right seat rails 26 connected to the rear portion of the main frame 21. Footrests 34 and 35 are provided below the rider seat 33a and the pillion seat 33b, respectively. A shift change pedal 36 is provided in front of the driver's footrest 34 on the left side of the vehicle body, and a brake pedal (not shown) for the rear wheel 7 is provided in front of the driver's footrest 34 on the right side of the vehicle body. Is provided.

  A front fork 61 is rotatably supported at a front end portion of the vehicle body frame 2 via a steering shaft (not shown) provided in the head pipe 22. A handlebar (not shown) is provided at the upper end of the steering shaft, and grips 62 are attached to both ends of the handlebar. The grip 62 on the right side of the vehicle body is a throttle grip as an accelerator operation unit. A clutch lever 63 is arranged on the left front side of the handle bar, and a brake lever (not shown) for the front wheel 6 is arranged on the right front side of the handle bar. A front wheel 6 is rotatably supported at the lower portion of the front fork 61. A brake disk 64 is provided on the front wheel 6.

  A swing arm 27 is connected to the swing arm bracket 23 of the body frame 2 so as to be swingable in the vertical direction, and a suspension (not shown) is attached between the body frame 2 and the swing arm 27. The rear wheel 7 is rotatably supported at the rear portion of the swing arm 27. A driven sprocket 72 is provided on the left side of the rear wheel 7 so that the power of the engine 8 is transmitted to the rear wheel 7 by a drive chain 73. A brake disk (not shown) for the rear wheel 7 is provided on the right side of the rear wheel 7.

  The upper part of the drive chain 73 is covered with a chain cover 74, and the upper part of the rear wheel 7 is covered with a rear fender 75 arranged behind the pillion seat 33b. The rear fender 75 is provided with a pair of left and right rear winkers 76 and a brake lamp 77 behind the rear winkers 76. The body frame 2 and the like are provided with a cowl 37 as a body exterior. A gap is formed between the cowl 37 and the vehicle body frame 2 for taking outside air into the engine 8 from the front of the vehicle body.

  The engine 8 includes, for example, a parallel 4-cylinder engine and a transmission, and is suspended from the main frame 21 in a state where the engine 8 is tilted forward. Air is taken into the engine 8 via the intake duct 43 and the air cleaner 41, and the air and fuel are mixed by the fuel injection device and supplied to the combustion chamber. Exhaust gas after combustion in the combustion chamber is exhausted from the muffler 38 through an exhaust pipe 39 extending downward from the engine 8. In this case, the intake air amount to the engine 8 is controlled by the intake air control device mounted on the motorcycle 1.

  Here, the air cleaner 41 constituting the intake air control device according to the present embodiment will be described. FIG. 5 is a perspective view of the air cleaner 41 according to the present embodiment. FIG. 6 is a top view of the air cleaner 41 according to the present embodiment with the air cleaner cover 412 removed.

  As shown in FIGS. 5 and 6, the air cleaner 41 is formed of synthetic resin, and is configured by attaching an air cleaner cover 412 having an open lower surface to an air cleaner case 411 having an open upper surface. The substantially front half 413 of the air cleaner case 411 bulges downward to form an outside air introduction chamber 415. A pair of left and right intake ducts 43 extending toward the front are provided in a substantially front half 413 of the air cleaner case 411 bulging downward. Outside air is introduced into the outside air introduction chamber 415 from the pair of left and right intake ducts 43.

  A sensor unit 45 that detects the operation amount of the throttle grip is attached to the outside air introduction chamber 415. The sensor unit 45 is disposed between the openings 431 of the pair of left and right intake ducts 43 formed in the air cleaner 41. From the sensor unit 45, a harness 456 connected to an ECU (Electronic Control Unit) 47 (see FIG. 7) and a throttle cable 452 connected to a throttle grip extend. The harness 456 and the throttle cable 452 are drawn from the front end portion of the air cleaner 41 to the front of the vehicle body. At the front end portion, a seal rubber 421 for sealing the harness 456 and the throttle cable 452 is attached to a mating surface between the air cleaner case 411 and the air cleaner cover 412.

  The outside air introduction chamber 415 is provided with a pair of rectifying plates 422 so as to sandwich the sensor unit 45 in the vehicle width direction. The pair of rectifying plates 422 prevent water droplets and dust from entering the sensor unit 45 between the sensor unit 45 and the openings 431 of the pair of left and right intake ducts 43. The pair of rectifying plates 422 are arranged in a substantially V shape in a top view so as to narrow the facing interval from the front end portion of the air cleaner 41 toward the rear. The arrangement of the pair of rectifying plates 422 rectifies the outside air taken in from the pair of left and right intake ducts 43. The details of the rectifying structure in the air cleaner 41 will be described later.

  A partition wall 418 is provided in the air cleaner case 411 so as to surround the outside air introduction chamber 415. A filter (not shown) is attached to the partition wall 418 so as to cover the upper part of the outside air introduction chamber 415. The outside air flowing in from the outside air introduction chamber 415 is cleaned through the filter. Thus, the air cleaner 41 is divided into a dirty side and a clean side by the filter. An air funnel 44 as an outside air intake is attached to the substantially rear half 414 of the air cleaner case 411 corresponding to the intake port of each cylinder of the engine 8.

  The air cleaner cover 412 bulges out substantially in a dome shape and forms a clean side above the air cleaner case 411. In the air cleaner 41 configured as described above, outside air is introduced from the intake duct 43 to the dirty side, and the outside air is sent to the clean side through the filter. The clean side outside air is sent to the intake port of the engine 8 through each air funnel 44. At this time, the amount of intake air into the engine 8 is controlled in the throttle body provided between the air funnel 44 and the intake port. The intake air amount is controlled based on the throttle grip operation amount detected by the sensor unit 45.

  Next, the sensor unit 45 according to the present embodiment will be described with reference to FIGS. FIG. 7 is a cross-sectional view of the periphery of the intake control device according to the present embodiment. FIG. 8 is a top view of the periphery of the intake control device according to the present embodiment. FIG. 7 is a view in which the main frame 21 and the air cleaner 41 are cut along a vertical plane on the vehicle body center line C1. In FIG. 7, the engine 8 is indicated by a two-dot chain line for convenience of explanation, and in FIG. 8, the electric motor 48 is indicated by a two-dot chain line for convenience of explanation.

  As shown in FIGS. 7 and 8A, the air cleaner case 411 is located above the head cover 81 of the engine 8. A sensor unit 45 is attached in the air cleaner case 411 by a bracket (not shown). The sensor unit 45 includes a throttle pulley 453 connected to a throttle grip via a throttle cable 452 and an accelerator position sensor 454 attached to the throttle pulley 453. The throttle pulley 453 rotates in conjunction with the operation of the throttle grip via the throttle cable 452.

  The accelerator position sensor 454 detects the operation amount of the throttle grip according to the rotation amount of the throttle pulley 453. The accelerator position sensor 454 is connected to the ECU 47 located behind the air cleaner case 411 via the harness 456, and outputs an operation amount of the throttle grip to the ECU 47. In the ECU 47, the throttle opening is calculated based on the detection result of the accelerator position sensor 454. The ECU 47 includes a processor that executes various processes, a memory, and the like. The memory is composed of one or a plurality of storage media such as a ROM (Read Only Memory) and a RAM (Random Access Memory) depending on the application. The memory stores a control program for controlling each part of the engine 8.

  The throttle opening calculated by the ECU 47 is output to an electric motor 48 provided below the air cleaner 41. The electric motor 48 is connected to the throttle valve 83 via a power transmission mechanism. The throttle valve 83 is rotatably supported in a throttle body 82 disposed between the air cleaner case 411 and the intake port of the engine 8. The electric motor 48 is driven based on the throttle opening inputted from the ECU 47, and the throttle valve 83 is opened and closed, whereby the amount of intake air from the air cleaner 41 into the engine 8 is controlled.

  By the way, the accelerator position sensor 454 according to the present embodiment is disposed in an air cleaner 41 that is spaced upward from the engine 8 that is a heat source. In the air cleaner 41, the accelerator position sensor 454 is installed so as to overlap the openings 431 of the pair of left and right intake ducts 43 in a side view. The installation space S of the accelerator position sensor 454 is formed in a substantially V shape in a top view that becomes narrower toward the rear by a pair of rectifying plates 422. The accelerator position sensor 454 is installed with the coupler 455 facing the narrow rear side of the installation space S.

  The installation space S around the accelerator position sensor 454 is effectively cooled by the outside air introduced from the pair of left and right intake ducts 43 flowing along the pair of rectifying plates 422. By introducing the outside air, the periphery of the accelerator position sensor 454 is maintained at a relatively low ambient temperature, so that the influence of the temperature characteristics is reduced and the detection accuracy of the accelerator position sensor 454 is improved.

  The sensor unit 45 is mounted in the air cleaner 41 so as to be close to the throttle grip in the height direction. The throttle pulley 453 of the sensor unit 45 is arranged to be biased toward the throttle grip in the vehicle width direction with respect to the vehicle body center line C1 extending in the vehicle body longitudinal direction. With such an arrangement, the throttle pulley 453 and the throttle grip are brought closer in the height direction and the vehicle width direction, and the cable length of the throttle cable 452 drawn out from the air cleaner 41 to the front of the vehicle body can be shortened.

  The throttle cable 452 and the harness 456 are drawn forward from the air cleaner 41 via a seal rubber 421 that faces the throttle pulley 453 in the longitudinal direction of the vehicle body. At this time, the seal rubber 421 is also arranged so as to be biased toward the throttle grip in the vehicle width direction with respect to the vehicle body center line C1. For this reason, the throttle cable 452 extending from the throttle pulley 453 forward of the vehicle body is connected to the throttle grip without straddling the vehicle body center line C1.

  Therefore, unlike the configuration in which the sensor unit 45 shown in FIG. 8B is reversed left and right, it is not necessary to bend the throttle cable 452 abruptly so as to avoid the head pipe 22, and the bending generated in the throttle cable 452 can be moderated. In the present embodiment, by shortening the cable length and increasing the curvature of the throttle cable 452, the operating resistance acting on the throttle cable 452 is reduced, and the operability of the throttle grip is improved.

  Further, since the sensor unit 45 is accommodated in the air cleaner 41, it is not necessary to newly provide an installation space for the sensor unit 45 in addition to the installation space for the air cleaner 41. Therefore, the sensor unit 45 and the air cleaner 41 can be compactly arranged in the height direction with respect to the vehicle body. Further, since the sensor unit 45 is accommodated in the air cleaner 41, adhesion of foreign matters such as water droplets and dust to the sensor unit 45 is suppressed, and further, the sensor unit 45 is protected from external impact.

  As shown in FIG. 9, the air cleaner case 411 is formed such that a substantially front half 413 swells downward. The bottom portion 416 of the substantially front half 413 is inclined rearwardly at the front side and inclined forwardly at the rear side. The sensor unit 45 is attached to the inclined surface 423 on the front side of the bottom portion 416 in the air cleaner 41. That is, the sensor unit 45 is disposed at a position higher than the bottom surface 424 located between the front side and the rear side of the bottom portion 416. Therefore, even if rainwater enters the air cleaner 41 from the intake duct 43, the sensor unit 45 can be separated from the rainwater accumulated on the bottom surface 424, and the accelerator position sensor 454 is prevented from being broken.

  Returning to FIG. 8A, in the state where the sensor unit 45 is mounted inside the air cleaner 41, the center position P1 of the sensor unit 45 in the vehicle width direction is positioned on the vehicle body center line C1. As a result, the left and right weight balance of the vehicle body is brought close to each other, and the steering stability is improved. In addition, the sensor unit 45 should just be arrange | positioned so that it may overlap with the vehicle body centerline C1 in top view. In particular, the center of gravity of the sensor unit 45 is preferably positioned on the vehicle body center line C1.

  Next, the rectifying structure in the air cleaner 41 will be described with reference to FIG. FIG. 10 is an explanatory diagram of the rectifying structure in the air cleaner 41 according to the present embodiment.

  As shown in FIG. 10A, the air cleaner 41 takes in outside air from a pair of left and right intake ducts 43 and sends out outside air toward four air funnels 44 located on the downstream side. The series of air funnels 44 are arranged side by side in the vehicle width direction, but are displaced in the vehicle width direction by the cam chain chamber of the engine 8 provided below the air cleaner 41. That is, a width center line (right and left target lines dividing the plurality of air funnels 44 into left and right targets) C2 passing through the center position of the series of air funnels 44 in the vehicle width direction is offset with respect to the vehicle body center line C1.

  In the present embodiment, a pair of rectifying plates 422 are provided in the air cleaner 41 so that the outside air can be uniformly fed into the offset air funnels 44. The pair of rectifying plates 422 are located between the openings 431 of the pair of left and right intake ducts 43 and the sensor unit 45, and form an intake air flow on both sides of the sensor unit 45. The pair of rectifying plates 422 extend in a circular arc shape in the longitudinal direction of the vehicle body so that outside air introduced from the left and right oblique directions in front of the vehicle body via the pair of left and right intake ducts 43 is directed toward the rear of the vehicle body.

  When the outside air introduced from the pair of left and right intake ducts 43 flows along the pair of rectifying plates 422, an intake air flow from the pair of left and right intake ducts 43 toward the series of air funnels 44 is formed in the air cleaner 41. In this way, the flow of intake air in the air cleaner 41 is effectively rectified by the rectifying plate 422, so that an increase in pressure loss due to intake air turbulence is suppressed. Further, as described above, the pair of rectifying plates 422 is effectively cooled by the outside air, and the periphery of the accelerator position sensor 454 sandwiched between the pair of rectifying plates 422 is maintained at a low ambient temperature.

  Further, the pair of rectifying plates 422 are arranged with a gap L1 from the wall surface of the air cleaner case 411. Due to the gap L1, an intake air flow is also generated around the sensor unit 45 inside the pair of rectifying plates 422. For example, when the flow velocity is low in the low rotation region of the engine 8, not only the outside air from the pair of left and right intake ducts 43 but also the air around the sensor unit 45 inside the pair of rectifying plates 422 is sent into the air funnel 44. . Thereby, the transient performance of the engine 8 is improved even when a sufficient flow velocity cannot be obtained in the air cleaner 41.

  At this time, the pair of rectifying plates 422 are positioned so as to sandwich the width center line C2. By the arrangement of the pair of rectifying plates 422, a left and right intake air flow is created in the air cleaner 41, and the outside air is evenly sent to the air funnels 44. Since the outside air is uniformly introduced to the air funnels 44, there is no variation in the air fuel consumption (A / F) of each cylinder of the engine 8. For this reason, the combustion state of each cylinder, engine output, etc. are equalized, and engine vibration is reduced.

  In the present embodiment, the center position P2 of the facing interval between the pair of rectifying plates 422 is offset from the width center line C2, but this is not a limitation. As shown in FIG. 10B, the center position P2 of the opposing interval between the pair of rectifying plates 422 may be positioned on the width center line C2. With this configuration, the left and right intake air flows can be created more evenly, and the outside air can be evenly sent to the air funnels 44.

  As described above, according to the intake air control apparatus of the present embodiment, the sensor unit 45 is disposed between the opening 431 of the pair of left and right intake ducts 43 in the air cleaner 41. Accordingly, the ambient temperature around the sensor unit 45 is maintained at a relatively low ambient temperature by the outside air flowing into the air cleaner 41 from the intake duct 43. Therefore, the detection accuracy by the accelerator position sensor 454 is improved, and the intake amount of the engine 8 is appropriately controlled by opening and closing the throttle valve 83 in accordance with the throttle grip operation amount.

  Further, since the sensor unit 45 is provided above the engine 8, the throttle cable 452 connected from the accelerator position sensor 454 to the sensor unit 45 can be shortened, and the operation resistance acting on the throttle cable 452 can be reduced to reduce the operability of the accelerator operation unit. Can be improved. Further, since the sensor unit 45 is disposed in the air cleaner 41, adhesion of foreign matters such as water droplets and dust to the sensor unit 45 is suppressed, and the sensor unit 45 can be protected from external impact.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the intake control device according to the present embodiment, the pair of rectifying plates 422 are arranged in the air cleaner 41 in a substantially V shape when viewed from above, but the present invention is not limited to this configuration. The pair of rectifying plates 422 only needs to be able to guide the outside air introduced from the pair of left and right intake ducts 43 to the air funnel 44. For example, as shown in FIG. 422 may be arranged.

  In addition, as shown in FIG. 12, the pair of rectifying plates 422 may not be disposed in the air cleaner 41. In this case, both side surfaces of the sensor unit 45 function as rectifying plates, and a right and left intake air flow is created in the air cleaner 41. With this configuration, it is possible to send outside air evenly to the plurality of air funnels 44. In FIG. 11 and FIG. 12, the same reference numerals are assigned to the same names as those in the above embodiment.

  In the intake control device according to the present embodiment, the throttle grip is exemplified as the accelerator operation unit, but the present invention is not limited to this configuration. The accelerator operation unit only needs to be able to adjust the opening degree of the throttle valve, and may be composed of, for example, a throttle lever.

  In the intake control device according to the present embodiment, the sensor unit 45 includes the accelerator position sensor 454 and the throttle pulley 453, but is not limited to this configuration. The sensor unit 45 may have any configuration as long as it is connected to the accelerator operation unit via the throttle cable 452 and can detect the operation amount of the accelerator operation unit.

  In the intake control device according to the present embodiment, the sensor unit 45 is disposed so as to overlap the vehicle body center line C1, but the present invention is not limited to this configuration. As long as the sensor unit 45 has a weight that does not affect the weight balance of the vehicle body, the sensor unit 45 may be disposed at a position deviating from the vehicle body center line C1.

1 Motorcycle 2 Body frame 8 Engine 21 Main frame 41 Air cleaner 43 Intake duct 44 Air funnel (outside air intake)
45 Sensor unit 47 ECU
48 Electric motor 81 Head cover 82 Throttle body 83 Throttle valve 411 Air cleaner case 412 Air cleaner cover 416 Bottom 421 Seal rubber 422 Rectifying plate 423 Inclined surface 424 Bottom surface 431 Opening 452 Throttle cable 453 Throttle pulley 454 Accelerator position sensor 455 Coupler 4 C2 width center line

Claims (7)

In the intake control device that controls the intake amount of the engine by opening and closing the throttle valve according to the operation amount of the accelerator operation unit,
An air cleaner disposed above the engine and connected to the intake port of the engine via the throttle valve;
A pair of left and right intake ducts protruding from the air cleaner toward the front of the vehicle body so as to take outside air into the air cleaner;
A sensor unit connected to a throttle cable extending from the accelerator operation unit and detecting an operation amount of the accelerator operation unit;
The air intake control device, wherein the sensor unit is disposed in the air cleaner between openings of the pair of left and right intake ducts formed in the air cleaner. In the air cleaner, a filter is provided so as to partition the air cleaner into an upstream dirty side in the intake flow direction and a clean side downstream in the intake flow direction,
The intake control device according to claim 1, wherein the sensor unit is disposed on a dirty side.   3. The intake control device according to claim 1, wherein the sensor unit is disposed so as to overlap a vehicle body center line extending in a vehicle longitudinal direction in a top view. In the air cleaner, a plurality of outside air intakes for taking outside air into the engine are provided,
2. The sensor unit according to claim 1, wherein the sensor unit is disposed so as to overlap a width center line extending in a vehicle longitudinal direction through a width center of the plurality of outside air intake ports in a vehicle width direction when viewed from above. 4. The intake control device according to any one of 3. The sensor unit includes a throttle pulley that rotates in conjunction with the operation of the accelerator operation unit via the throttle cable, and an accelerator position sensor that detects an operation amount of the accelerator operation unit according to a rotation amount of the throttle pulley. Have
The intake control device according to any one of claims 1 to 4, wherein the throttle cable extends forward from the throttle pulley.   The air cleaner is provided with a pair of rectifying plates for rectifying the intake air flow in the air cleaner between the sensor unit and the openings of the pair of left and right intake ducts. The intake control device according to claim 5.   The intake control device according to any one of claims 1 to 6, wherein the sensor unit is disposed at a position higher than the bottom surface in the air cleaner.

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