JP5259561B2 - Saddle riding vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saddle-type vehicle reducing an influence of environmental temperature on a motor and easily protecting the motor from rainwater or the like. <P>SOLUTION: This saddle-type vehicle includes: an internal combustion engine 20; an air cleaner 41 having an air cleaner element 42 cleaning intake air sucked from the outside and an air cleaner case 43; an intake passage 66 connecting the internal combustion engine 20 to the air cleaner case 43 and allowing the intake air cleaned by the air cleaner element 42 to flow toward the internal combustion engine 20; a throttle valve 70 provided in the intake passage 66 and adjusting an intake air flow rate; and the motor 75 as a power source opening/closing the throttle valve 70. The motor 75 is arranged inside of the air cleaner case 43. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a straddle-type vehicle that controls the opening of a throttle valve with a motor.

Conventionally, straddle-type vehicles such as rough terrain vehicles that detect the amount of operation of the throttle grip and control the opening of the throttle valve by a motor based on the amount of operation are known (see, for example, Patent Document 1 below) ).
The technique described in Patent Document 1 includes a fuel injection valve that injects and supplies fuel to an intake passage, and the opening degree of the throttle valve is controlled by a drive motor based on a throttle operation amount by manual operation of a throttle member. Is disposed on the side of the intake passage opposite to the fuel injection valve.

JP 2002-256896 A

However, in the saddle riding type vehicle described in Patent Document 1, various components such as an internal combustion engine are arranged close to each other in a narrow space due to the characteristics of the saddle riding type vehicle. Therefore, the heat of the internal combustion engine is easily transmitted to the drive motor.
Also, saddle riding type vehicles such as motorcycles and four-wheel buggies are used in an environment where they are directly exposed to outside air, rainwater, dust, or the like. Therefore, the motor for controlling the opening degree of the throttle valve is driven under an environment where the temperature change (thermal shock) is large. Therefore, complicated temperature correction control is required in throttle valve opening control.

  An object of the present invention is to provide a straddle-type vehicle that can reduce the influence of environmental temperature on a motor with a simple configuration and can easily protect the motor from rainwater and the like.

  According to a first aspect of the present invention, there is provided an internal combustion engine, an air cleaner having an air cleaner element for purifying intake air sucked from the outside, an air cleaner case capable of accommodating the air cleaner element, the internal combustion engine, and the air cleaner case. An intake passage for connecting intake air purified by the air cleaner element toward the internal combustion engine; a throttle valve provided in the intake passage for adjusting a flow amount of the intake air; and opening and closing the throttle valve A straddle-type vehicle including a motor that is a power source, wherein the motor is arranged inside the air cleaner case.

  According to a second aspect of the invention, in addition to the configuration of the first aspect, the air cleaner case includes an intake air circulation portion through which intake air flows, and the motor is disposed inside the intake air circulation portion. It is characterized by that.

  According to a third aspect of the present invention, in addition to the configuration according to the second aspect, the intake flow portion includes a first flow passage through which intake air sucked from outside mainly flows, and the first flow passage. A second circulation passage through which a small amount of intake air is circulated and whose downstream end extends into the air cleaner case, and the motor is disposed downstream of the second circulation passage. It arrange | positions in the vicinity of an edge part, or is arrange | positioned inside this 2nd distribution channel, It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, in addition to the configuration according to the second aspect, the air cleaner case includes the case main body having the air intake circulation portion and a partition wall formed inside the case main body. And an internal sub chamber formed as a sealed space, wherein the motor is disposed inside the internal sub chamber.

  According to a fifth aspect of the present invention, in addition to the configuration of the second aspect, the air cleaner case is provided outside the case main body by a case main body having the intake circulation portion and a blocking wall extending from the case main body. An external sub-chamber formed as a sealed space, and the motor is disposed inside the external sub-chamber.

  According to a sixth aspect of the invention, in addition to the configuration according to any one of the first to fifth aspects, the motor is configured integrally with the throttle valve.

  According to a seventh aspect of the invention, in addition to the configuration of the first aspect, a drive pulley connected to the motor, a driven pulley connected to the throttle valve, and the drive pulley and the driven pulley are wound. And an endless belt for transmitting the rotational driving force of the motor to the throttle valve.

  According to an eighth aspect of the present invention, in addition to the configuration of the first aspect, a drive pulley coupled to the motor, a driven pulley coupled to the throttle valve, and one end coupled to the drive pulley. And a pair of wire cables having the other end connected to the driven pulley and transmitting the rotational driving force of the motor to the throttle valve.

  According to the ninth aspect of the invention, in addition to the structure of the seventh or eighth aspect, the vehicle body frame, the internal combustion engine, and the internal combustion engine extend rearward from the vehicle, and support the rear wheels rotatably. A power unit having a rear wheel support portion and swingably connected to the vehicle body frame, the air cleaner case is disposed above the power unit, and the intake passage is formed at a front portion of the air cleaner case. The motor is connected and disposed at a position higher than the intake passage.

  According to a tenth aspect of the present invention, in addition to the configuration according to the ninth aspect, the air cleaner case further includes a cushion unit that connects the vehicle body frame and the power unit and suspends the power unit on the vehicle body frame. Has a relief portion formed in a recess so as to prevent interference with the cushion unit, and the motor is disposed in front of the relief portion.

  According to the first aspect of the present invention, by arranging the motor inside the air cleaner case, the motor is not directly exposed to the outside air, the heat of the internal combustion engine, or the like. Therefore, the environmental temperature change (thermal shock) received by the motor is small, and complicated temperature correction control is not necessary in the throttle valve opening control. In addition, the motor is not directly exposed to rainwater, dust, or the like. Therefore, the motor can be easily protected from an electrical short circuit caused by rainwater or the like.

  According to the second aspect of the present invention, the motor can be cooled by the intake air flowing through the intake circulation portion by arranging the motor inside the intake circulation portion. Therefore, the motor can be cooled under temperature conditions that are easy to control.

  According to the third aspect of the present invention, the motor that has generated heat by driving can be cooled by the intake air having a small circulation amount that circulates through the second circulation passage. Therefore, it is possible to suppress the influence of the heat generated by the motor from reaching the intake air flowing through the first flow passage. Further, the motor can be cooled by the intake air having a relatively small temperature change width.

  According to the fourth aspect of the present invention, the motor is not directly exposed to the outside air, the heat of the internal combustion engine or the like by disposing the motor inside the sealed internal sub chamber. Therefore, the thermal shock received by the motor is small, and complicated temperature correction control is not required in the throttle valve opening control. In addition, the motor is not exposed to rain water, dust, or the like. Therefore, the motor can be easily protected from an electrical short circuit caused by rainwater or the like.

  According to the fifth aspect of the present invention, the motor is not directly exposed to the outside air, the heat of the internal combustion engine, or the like by disposing the motor inside the sealed external sub chamber. Therefore, the thermal shock received by the motor is small, and complicated temperature correction control is not required in the throttle valve opening control. In addition, the motor is not exposed to rain water, dust, or the like. Therefore, the motor can be easily protected from an electrical short circuit caused by rainwater or the like.

  According to the invention described in claim 6, the motor is configured integrally with the throttle valve. Therefore, the entire apparatus (throttle body) can be configured compactly.

  According to the seventh aspect of the invention, the driving pulley and the driven pulley are connected by the belt. Therefore, the motor and the throttle valve can be connected with a simple structure. In addition, the layout of the motor and throttle valve can be easily adjusted, and the degree of freedom in design can be increased.

  According to the eighth aspect of the present invention, the driving pulley and the driven pulley are connected by the pair of wire cables. Therefore, the motor and the throttle valve can be connected with a simple structure. In addition, the layout of the motor and throttle valve can be easily adjusted, and the degree of freedom in design can be increased.

  According to the invention described in claim 9, the intake passage is connected to the front portion of the air cleaner case disposed above the power unit, and the motor is disposed at a position higher than the intake passage. Therefore, the belt can cross over the intake passage, and interference between the belt and the intake passage can be prevented.

  According to the tenth aspect of the present invention, the cushion unit disposed in the escape portion and the motor disposed in the air cleaner case can be prevented from overlapping in the left-right direction of the vehicle body. Therefore, the motor and the cushion unit can be disposed inside the vehicle body, and the vehicle width can be reduced.

It is a left view which shows the rough terrain vehicle of 1st Embodiment of this invention. It is a top view which shows a rough terrain vehicle. It is sectional drawing which shows an air cleaner. It is a top view which shows the inside of an air cleaner. It is sectional drawing (corresponding figure of FIG. 3) which shows typically the air cleaner provided in the rough terrain vehicle of 2nd Embodiment of this invention. It is sectional drawing (corresponding figure of Drawing 3) showing typically an air cleaner provided in a rough terrain vehicle of a 3rd embodiment of the present invention. It is sectional drawing (corresponding | compatible figure of FIG. 3) which shows typically the air cleaner provided in the rough terrain vehicle of 4th Embodiment of this invention. It is sectional drawing (corresponding figure of Drawing 3) showing typically an air cleaner provided in a rough terrain vehicle of a 5th embodiment of the present invention. It is sectional drawing (corresponding | compatible figure of FIG. 3) which shows typically the air cleaner provided in the rough terrain vehicle of 6th Embodiment of this invention. It is a left view which shows the scooter type vehicle of 7th Embodiment of this invention. It is a top view which extracts and shows the rear part of the scooter type vehicle shown in FIG. It is an enlarged view which extracts and shows the rear part of the scooter type vehicle shown in FIG. It is a left view which shows schematic structure of the throttle valve drive device provided in the scooter type vehicle of 8th Embodiment of this invention.

[First Embodiment]
The straddle-type vehicle according to the first embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, a four-wheel rough terrain vehicle (so-called ATV; All Terrain Vehicle) whose main purpose is traveling on rough terrain will be described as an example of the saddle riding type vehicle. FIG. 1 is a left side view showing the rough terrain vehicle according to the first embodiment of the present invention. FIG. 2 is a plan view showing the rough terrain vehicle. FIG. 3 is a cross-sectional view of the air cleaner, viewed from the left side. FIG. 4 is a plan view showing the inside of the air cleaner.
In the following description, descriptions of front and rear, left and right, and up and down directions are in accordance with the direction seen from the occupant (driver) who rides on the rough terrain vehicle unless otherwise specified. In the figure, the arrow FR indicates the front of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  First, the overall configuration of the rough terrain vehicle 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the rough terrain vehicle 1 of the present embodiment is attached to a body frame 5, a front wheel 2, a rear wheel 3, a steering shaft 6, and a body frame 5, and serves as an internal combustion engine. The power unit 35 having the engine 20 and the transmission 30, the front wheel driving force transmission unit 37, the rear wheel driving force transmission unit 38, the intake unit 40 that supplies intake air to the engine 20, and the fuel to the engine 20 The fuel supply unit 50, an exhaust unit 80 that exhausts exhaust from the engine 20 to the atmosphere, a passenger 85 seat 85, a body cover 96, a front fender 97, and a rear fender 98 are mainly configured.

  The body frame 5 is configured by integrally joining a plurality of types of steel materials by welding or the like. As shown in FIGS. 1 and 2, the vehicle body frame 5 includes a front upper frame 7, a seat rail 8, a lower frame 9, a rear frame 10, a front support frame 11, a front frame 12, and a front connection frame. 13, a rear inclined frame 14, a rear support frame 15, and cross members 16, 16 a, 17, 18, and 19.

  As shown in FIGS. 1 and 2, a pair of front upper frames 7 are provided on the left and right. The pair of front upper frames 7 extend obliquely downward and forward in the front part of the vehicle body in a side view. The lower end portions (front end portions) of the pair of front upper frames 7 are connected to the front end portions of the lower frame 9. A pair of seat rails 8 are provided on the left and right. The pair of seat rails 8 extend substantially horizontally rearward from the rear end portion of the front upper frame 7 in a side view.

A pair of lower frames 9 are provided on the left and right. The pair of lower frames 9 extend substantially horizontally rearward from the lower end (front end) of the front upper frame 7 in a side view.
A pair of rear frames 10 are provided on the left and right. The pair of rear frames 10 extends obliquely upward and rearward from the rear end portion of the lower frame 9 and is connected to the rear portion of the seat rail 8 in a side view.

  A pair of front support frames 11 are provided on the left and right. The pair of front support frames 11 are formed in a substantially square shape in a side view. One end of the front support frame 11 is connected to the front end portion of the seat rail 8 in a side view. The other end of the front support frame 11 is connected to a substantially U-shaped cross member 16a (described later) in a front view.

  The pair of front support frames 11 includes an upper bracket 11a that is a cross member. The upper bracket 11a connects the pair of front support frames 11 in the left-right direction. The upper bracket 11a rotatably supports the upper portion of the steering shaft 6.

  A pair of front frames 12 are provided on the left and right. One end (upper end) of the pair of front frames 12 is connected to a substantially central portion in the longitudinal direction of the front upper frame 7 in a side view. The other end (lower end) of the pair of front frames 12 extends obliquely downward and rearward and is connected to a substantially central portion in the front-rear direction of the lower frame 9.

  A pair of front connection frames 13 are provided on the left and right. The front ends of the pair of front connection frames 13 are connected to the front upper frame 7 in a side view. The rear ends of the pair of front connection frames 13 extend substantially horizontally rearward in a side view and are connected to a substantially central portion in the longitudinal direction of the front frame 12.

  The pair of front connection frames 13 includes a lower bracket 13a that is a cross member. The lower bracket 13a connects the pair of front connection frames 13 in the left-right direction. Further, the lower bracket 13a rotatably supports the lower end portion of the steering shaft 6.

A front guard 86 and a front carrier 87 are provided at the front portion of the vehicle body frame 5. The front guard 86 is connected to the front end portions of the pair of lower frames 9 and the pair of front upper frames 7 and extends upward.
The front carrier 87 is connected to the upper end portion of the front guard 86 and the pair of front support frames 11.

  A pair of rear inclined frames 14 are provided on the left and right. The upper ends of the pair of rear inclined frames 14 are connected to a substantially central portion in the front-rear direction of the seat rail 8 in a side view. The lower ends of the pair of rear inclined frames 14 are connected to a substantially central portion in the longitudinal direction of the rear frame 10 in a side view.

A pair of rear support frames 15 are provided on the left and right. The pair of rear support frames 15 are formed in a substantially U shape in a side view. One end (lower end) of the pair of rear support frames 15 is connected to a substantially central portion in the longitudinal direction of the rear frame 10 in a side view. The other end (upper end) of the pair of rear support frames 15 is connected to the rear end portion of the seat rail 8 in a side view.
A rear carrier 88 is provided at the rear of the body frame 5. The rear carrier 88 is connected to the pair of seat rails 8 and the pair of rear support frames 15.

  The cross members 16, 17, 18, and 19 connect the pair of front upper frames 7, the pair of seat rails 8, the pair of lower frames 9, the pair of rear frames 10, and the like in the left-right direction. The cross member 16a is formed in a substantially U shape when viewed from the front. A lower end portion in the left-right direction of the cross member 16 a is connected to a substantially central portion in the longitudinal direction of the pair of front upper frames 7.

  The steering shaft 6 is a member that steers the front wheel 2 and has a handle 6a at the top. The upper part of the steering shaft 6 is rotatably supported by the upper bracket 11a. The lower end portion of the steering shaft 6 is rotatably supported by the lower bracket 13a.

  Next, details of the power unit 35 will be described with reference to FIG. As shown in FIG. 1, the power unit 35 is attached to a substantially central portion in the front-rear direction of the body frame 5. The power unit 35 includes the engine 20 and the transmission 30.

The engine 20 is a prime mover (for example, a water-cooled single-cylinder reciprocating engine) of the rough terrain vehicle 1, and is mounted at a substantially central portion of the vehicle body in the front-rear direction as shown in FIG.
The engine 20 includes a cylinder head 21 having an intake valve (not shown) and an exhaust valve (not shown), a cylinder 25 to which the cylinder head 21 is fixed, an intake unit 40 and an exhaust unit connected to the cylinder head 21. 80 and the crankcase 26 are mainly configured.

A piston (not shown) is fitted inside the cylinder 25 so as to be able to reciprocate. The reciprocating motion of the piston is converted into rotational motion of a crankshaft (not shown) via a connecting rod (not shown). The output of the engine 20 is transmitted to the front wheels 2 and the rear wheels 3 via the transmission 30, a front wheel driving force transmission unit 37 (described later) and a rear wheel driving force transmission unit 38 (described later).
The crankcase 26 is integrally provided with a transmission 30 (described later). That is, the crankcase 26 also serves as a case (housing) for the transmission 30.

  The transmission 30 is configured to decelerate the output of the engine 20 (the number of rotations of the crankshaft) using, for example, a predetermined hydraulic device or the like (not shown) and arbitrarily change the gear ratio. The transmission 30 may be configured as a hydrostatic continuously variable transmission, for example. The hydrostatic continuously variable transmission includes a constant displacement swash plate hydraulic pump (not shown) and a variable displacement hydraulic motor (not shown) arranged on the same axis, and a hydraulic motor (output side) This is a device for obtaining a stepless speed change output by making a swash plate (not shown) variable.

The front wheel driving force transmission unit 37 is configured to be able to transmit the driving force from the power unit 35 to the front wheels 2.
The rear wheel driving force transmission unit 38 is configured to be able to transmit the driving force from the power unit 35 to the rear wheel 3.

  Details of the intake section 40 will be described later.

Next, details of the fuel supply unit 50 will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the fuel supply unit 50 includes a fuel tank 51, a fuel pump 52, a communication pipe 53a, a fuel supply pipe 53, and an injector (not shown). The
The fuel tank 51 stores fuel to be supplied to the engine 20. The fuel tank 51 is disposed above the seat rail 8 and in the vicinity of the steering shaft 6. The fuel tank 51 is connected to the fuel pump 52 via a communication pipe 53a.

  The fuel pump 52 is connected to the fuel supply pipe 53, and sends the fuel from the fuel tank 51 to the fuel supply pipe 53. The fuel supply pipe 53 supplies fuel delivered from the fuel pump 52 to an injector (not shown). The injector injects fuel toward an intake port (not shown) of the engine 20. The injector is provided on the downstream side of the connecting tube 66 (described later), for example.

  Next, the details of the exhaust unit 80 will be described with reference to FIG. As shown in FIG. 1, the exhaust unit 80 discharges exhaust from the engine 20 to the atmosphere. The exhaust unit 80 includes an exhaust pipe 81 and a silencer 82. The proximal end side of the exhaust pipe 81 is connected to the front part of the cylinder head 221. The front end side of the exhaust pipe 81 extends rearward. The silencer 82 silences the exhaust sound and is connected to the rear end portion of the exhaust pipe 81.

  As shown in FIG. 1, the seat 85 is for an occupant to sit on, and is supported on upper portions of the pair of seat rails 8.

As shown in FIG. 1, the body cover 96 covers the front part of the vehicle body including the fuel tank 51. The body cover 96 is made of, for example, a synthetic resin.
The front fender 97 is fixed to the front portion of the vehicle body frame 5 and covers the front wheel 2 from above to the rear. The rear fender 98 is fixed to the rear portion of the vehicle body frame 5 and covers the rear wheel 3 from above to the front. The front fender 97 and the rear fender 98 are made of, for example, a synthetic resin.

  Next, details of the intake section 40 will be described with reference to FIGS. As shown in FIGS. 1 to 4, the intake section 40 supplies intake air to the engine 20. The intake section 40 includes an air cleaner 41, a snorkel duct 60, a connecting tube 66 as an intake passage, and a throttle valve 70, and a motor unit 73 that opens and closes the throttle valve 70 with a motor 75.

As shown in FIGS. 3 and 4, the air cleaner 41 forms part of the intake passage and purifies the air supplied to the engine 20 (see FIG. 1). The air cleaner 41 is connected to an intake port (not shown) of the engine 20 via a connecting tube 66.
The air cleaner 41 includes an air cleaner element 42 and an air cleaner case 43.

The air cleaner element 42 is a member that purifies (filters) air (intake air) sucked from a snorkel duct 60 (described later).
The air cleaner case 43 accommodates the air cleaner element 42. Inside the air cleaner case 43 and around the air cleaner element 42, an intake air circulation portion 47, which is a space through which intake air flows, is formed.

The air cleaner case 43 includes a case main body 44 and a case cover 45. The upper portion of the case main body 44 is opened, and has a bottomed box shape (substantially rectangular parallelepiped shape). The case main body 44 has an air cleaner element 42 fixed above the inside thereof.
A duct seal 63 (described later) and a connecting tube 66 (described later) are connected to the front surface of the case main body 44. At the four corners of the opening of the case body 44, fasteners 46 (see FIGS. 1 and 4) for fastening the case cover 45 are provided.

  The case cover 45 covers the opening of the case main body 44 so as to ensure the airtightness of the air cleaner case 43. The case cover 45 is detachably attached to the case main body 44 by a fastener 46. A second circulation passage 62 (described later) is connected to the front surface of the case cover 45.

  A downstream end portion (rear end portion) of a snorkel duct 60 (described later) is connected to the front portion of the air cleaner case 43 configured as described above.

  As shown in FIGS. 3 and 4, the snorkel duct 60 is a pipe-like member that introduces air from the outside into the air cleaner 41, and the rear portion (downstream side) is branched. The snorkel duct 60 includes a first flow passage 61 and a second flow passage 62 branched from the downstream portion of the first flow passage 61. The first circulation passage 61 and the second circulation passage 62 function as an intake circulation portion through which intake air flows.

  The first circulation passage 61 is a passage through which intake air sucked from the outside mainly circulates, and forms the main pipe of the snorkel duct 60. The front end portion (upstream end portion) of the first circulation passage 61 is opened and opened to the atmosphere. The downstream end portion (rear end portion) of the first flow passage 61 is on the right side of the front surface of the case main body 44 and is connected to a substantially intermediate portion in the height direction via a duct seal 63. The duct seal 63 is configured such that the rear end portion (downstream end portion) of the first flow passage 61 is detachable.

The second circulation passage 62 is a passage branched from the first circulation passage 61. The second circulation passage 62 has a smaller inner diameter than the first circulation passage 61. That is, a smaller amount of intake air flows through the second flow passage 62 than the intake air flowing through the first flow passage 61.
The downstream end 62 a of the second flow passage 62 is connected to the right side of the front surface of the case cover 45. An end 62a of the second flow passage 62 extends into the air cleaner case 43 (case cover 45). A motor unit 73 is disposed in the vicinity of the end 62 a of the second circulation passage 62.

  As shown in FIGS. 3 and 4, the connecting tube 66 supplies intake air to an intake port (not shown) of the engine 20 and constitutes a part of the intake passage. The rear end portion (upstream end portion) of the connecting tube 66 is a central portion in the left-right direction of the front surface of the case main body 44 and is connected to the upper portion. The rear end portion of the connecting tube 66 extends into the case main body 44 and is airtightly connected to the front portion of the air cleaner element 42. That is, the intake air purified by the air cleaner element 42 flows through the connecting tube 66.

  A throttle valve 70 (described later) is disposed in a portion located in the connecting tube 66 and in the case main body 44. The throttle valve 70 is configured to be freely opened and closed. A valve shaft 71 (described later) of the throttle valve 70 is rotatably supported by the connecting tube 66.

  The connecting tube 66 is configured to be appropriately divided in a path from the engine 20 to the case main body 44. A fuel injection valve (not shown) that injects fuel toward an intake valve (not shown) of the engine 20 is provided on the front end side (downstream side) of the connecting tube 66.

The motor unit 73 includes a unit main body 74, a motor 75, a throttle valve 70, a gear group (not shown), and a throttle position sensor (not shown) for detecting the rotation angle of the valve shaft 71 of the throttle valve 70. .
The unit main body 74 forms a housing of the motor unit 73, and integrally stores a motor 75, a throttle valve 70, a gear group, and a throttle position sensor (not shown). The unit main body 74 is fixed to the inner wall surface of the case main body 44.

  The motor 75 is a power source that opens and closes a throttle valve 70 (described later), and is operated by an electric signal. The motor 75 has a drive shaft 72 and is configured to be able to control the rotation angle of the drive shaft 72. An example of the motor 75 is a pulse motor. The motor 75 is connected to a motor drive circuit (not shown) and an electronic control unit (ECU) described later.

  As shown in FIGS. 3 and 4, the motor 75 is disposed in the vicinity of the downstream end of the second flow passage 62 in the air cleaner case 43 (case body 44). The motor 75 is disposed at a position where the intake air flowing through the second flow passage 62 directly hits.

  As shown in FIGS. 3 and 4, the throttle valve 70 is a so-called butterfly valve that has a valve shaft 71 and rotates around the valve shaft 71. A gear group (not shown) transmits the driving force of the motor 75 to the valve shaft 71 of the throttle valve 70. Note that, as long as the driving force of the motor 75 can be transmitted to the valve shaft 71 of the throttle valve 70, it may not be a gear group, and may be a pulley, for example.

  A throttle position sensor (not shown) is provided in the motor unit 73. The throttle position sensor detects the opening degree of the throttle valve 70 by detecting the rotation angle of the valve shaft 71. The throttle position sensor is connected to an electronic control device described later. A detection signal (detection value) from the throttle position sensor is output to the electronic control unit.

  An electronic control unit (ECU) (not shown) includes a microcomputer. The electronic control device controls the rotation of the motor 75 in accordance with the throttle operation amount by the driver. Further, the electronic control unit monitors the opening degree of the throttle valve 70 by the throttle position sensor. The electronic control unit performs various basic controls (such as ignition timing control of the engine 20 and fuel injection control) of the rough terrain vehicle 1 based on signals from various sensors (not shown).

Next, the effect | action in 1st Embodiment is demonstrated, referring FIGS. 1-4.
When the driver performs a throttle operation, a drive shaft (not shown) of the motor 75 rotates a predetermined amount according to the operation amount. The driving force of the motor 75 is transmitted to the valve shaft 71 via a gear group (not shown), and the throttle valve 70 rotates together with the valve shaft 71.

  The motor 75 (motor unit 73) is disposed in the intake air circulation portion 47 inside the sealed air cleaner case 43. Therefore, it is difficult to be directly exposed to the outside air, the heat of the engine 20, etc., and is cooled by the intake air flowing through the intake air circulation portion 47.

According to the rough terrain vehicle 1 of the first embodiment, for example, the following effects are exhibited.
In the rough terrain vehicle 1 of the first embodiment, the air cleaner 41 having the air cleaner element 42 and the air cleaner case 43, the engine 20 and the air cleaner case 43 are connected, and the intake air purified by the air cleaner element 42 is used as the engine 20. A connecting tube 66 that circulates toward the vehicle, a throttle valve 70 that is provided in the connecting tube 66 and that adjusts the flow rate of intake air, and a motor 75 that opens and closes the throttle valve 70, and includes a motor 75 (motor unit 73). Is disposed inside the air cleaner case 43.

Therefore, the motor 75 is disposed inside the air cleaner case 43, so that the motor 75 is not directly exposed to the outside air, the heat of the engine 20, or the like, and is cooled by the intake air flowing through the air cleaner case 43.
Therefore, according to the rough terrain vehicle 1 of the first embodiment, the change in the environmental temperature (thermal shock) received by the motor 75 is small, and complicated temperature correction control is not necessary in the opening degree control of the throttle valve 70.

  Further, the motor 75 is difficult to be directly exposed to rainwater, dust (dust) or the like. Therefore, according to the rough terrain vehicle 1 of the first embodiment, the motor 75 can be easily protected from an electrical short circuit caused by rainwater or the like. Further, the motor 75 does not need to have a housing corresponding to rainwater or the like. Therefore, the housing of the motor 75 can be simplified, and the entire apparatus can be configured to be small and light.

In general, it is difficult to arrange a motor, which is a power source for opening and closing a throttle valve, in the vicinity of a throttle body in which an arrangement space is difficult to secure.
On the other hand, according to the rough terrain vehicle 1 of the first embodiment, by arranging the motor 75 inside the air cleaner case 43, a space for motor arrangement that has been difficult to secure in the past can be easily obtained. Can be secured.

In addition, it is preferable to dispose the motor 75 inside the air cleaner case 43 as in the first embodiment rather than disposing the air cleaner so as to avoid the motor disposed in the vicinity of the throttle body. The capacity of the (air cleaner 41) can be easily increased.
Therefore, according to the rough terrain vehicle 1 of the first embodiment, it is possible to easily cope with an increase in the required intake air amount.

  In the rough terrain vehicle 1 of the first embodiment, the air cleaner case 43 includes the intake air circulation portion 47, and the motor 75 (motor unit 73) is disposed inside the intake air circulation portion 47. Therefore, according to the rough terrain vehicle 1 of the first embodiment, the motor 75 is not directly exposed to the outside air, the heat of the engine 20, rainwater, and the like, and is not easily affected by the thermal shock.

Further, in the rough terrain vehicle 1 of the first embodiment, the motor 75 is cooled by the intake air that circulates through the intake air circulation portion 47 and has a relatively small temperature change width.
Therefore, according to the rough terrain vehicle 1 of the first embodiment, the motor 75 can be cooled under a temperature condition that is easy to control (for example, an atmospheric temperature of 25 ° C.).

  Further, in the rough terrain vehicle 1 of the first embodiment, the intake air circulation unit 47 includes a first circulation passage 61 through which intake air sucked from the outside mainly circulates and intake air that circulates through the first circulation passage 61. A small amount of intake air flows, and a downstream end 62 a extends to the inside of the air cleaner case 43, and the motor 75 has a downstream end of the second circulation passage 62. It arrange | positions in the vicinity of the part 62a.

  The intake air flowing through the second flow passage 62 is less than the intake air flowing through the first flow passage 61. Therefore, according to the rough terrain vehicle 1 of the first embodiment, the motor 75 that has generated heat by driving can be cooled by the intake air having a small circulation amount that circulates through the second circulation passage 62. Further, the influence of the heat generated by the motor 75 can be prevented from reaching the intake air flowing through the first flow passage 61. Further, the motor 75 can be cooled by the intake air having a relatively small temperature change width.

  Further, in the rough terrain vehicle 1 of the first embodiment, the motor 75 includes a motor unit 73 configured integrally with the throttle valve 70. Therefore, according to the rough terrain vehicle 1 of the first embodiment, the motor unit 73 as the throttle body can be configured compactly.

  Next, another embodiment of the present invention will be described. The other embodiments will be described mainly with respect to differences from the first embodiment, and the same configurations as those of the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted. For the points not specifically described in other embodiments, the description of the first embodiment is appropriately applied or incorporated.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view (corresponding to FIG. 3) schematically showing an air cleaner provided in the rough terrain vehicle of the second embodiment of the present invention, as viewed from the left side.

  The basic configuration of the rough terrain vehicle of the second embodiment is the same as that of the rough terrain vehicle 1 of the first embodiment. The difference from the first embodiment is the configuration of the air cleaner. Therefore, in the following description, detailed description of the rough terrain vehicle is omitted, and the configuration of the air cleaner will be described focusing on differences from the air cleaner 41 of the first embodiment. For convenience of explanation, in the illustration of the air cleaner case 43, a case cover corresponding to the case cover 45 of the first embodiment is omitted. Further, the snorkel duct 60 is connected to the rear portion (the right side in FIG. 5) of the air cleaner case 43.

As shown in FIG. 5, in the air cleaner 41 </ b> A of the rough terrain vehicle of the second embodiment, the intake air circulation portion 47 includes a first circulation passage 61 and a second circulation passage 62.
In the first circulation passage 61, intake air sucked from the outside mainly circulates.
In the second circulation passage 62, a smaller amount of intake air than the intake air flowing through the first circulation passage 61 circulates, and the downstream end extends into the air cleaner case 43.

Specifically, the air cleaner case 43 of the air cleaner 41 </ b> A includes a partition member 100. The partition member 100 has a substantially L-shaped cross section when viewed from the side. The partition member 100 extends from the downstream side (right side in FIG. 5) of the snorkel duct 60 to the front of the vehicle body and into the air cleaner case 43. A front end portion of the partition member 100 is disposed in the vicinity of the motor 75. The intake circulation portion 47 and the snorkel duct 60 are partitioned into a first circulation passage 61 and a second circulation passage 62 by the partition member 100.
The motor 75 (motor unit 73) is disposed inside the second circulation passage 62 (so-called dirty side).

According to the rough terrain vehicle of the second embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the rough terrain vehicle of the second embodiment, the intake air flowing through the second flow passage 62 of the air cleaner 41 </ b> A is less than the intake air flowing through the first flow passage 61. Therefore, according to the rough terrain vehicle of the second embodiment, the motor 75 that generates heat by driving can be cooled by the intake air having a small circulation amount that circulates through the second circulation passage 62. Further, the influence of the heat generated by the motor 75 can be prevented from reaching the intake air flowing through the first flow passage 61. Further, the motor 75 can be cooled by the intake air having a relatively small temperature change width.

[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view (corresponding to FIG. 3) schematically showing an air cleaner provided in the rough terrain vehicle of the third embodiment of the present invention, as viewed from the left side.

As shown in FIG. 6, in the air cleaner 41 </ b> B of the rough terrain vehicle of the third embodiment, the air cleaner case 43 includes a case main body 44 having an intake air circulation portion 47 and an internal sub chamber 104.
The internal sub chamber 104 is partitioned from the intake circulation portion 47 by a partition wall 102 formed inside the case main body 44, and is formed as a sealed space. The motor 75 (motor unit 73) is disposed inside the internal sub chamber 104.

According to the rough terrain vehicle of the third embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the rough terrain vehicle of the third embodiment, since the motor 75 is disposed inside the sealed internal sub chamber 104, the motor 75 is not directly exposed to the outside air, the heat of the engine 20, or the like. Therefore, according to the rough terrain vehicle of the third embodiment, a change in the environmental temperature (thermal shock) received by the motor 75 is small, and complicated temperature correction control is not necessary in the opening degree control of the throttle valve 70.

  Further, the motor 75 is not exposed to rain water or dust. Therefore, according to the rough terrain vehicle of the third embodiment, the motor 75 can be easily protected from an electrical short circuit caused by rainwater or the like.

[Fourth Embodiment]
A fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view (corresponding to FIG. 3) schematically showing an air cleaner provided in the rough terrain vehicle of the fourth embodiment of the present invention, as viewed from the left side.

As shown in FIG. 7, in the air cleaner 41 </ b> C of the rough terrain vehicle of the fourth embodiment, the air cleaner case 43 includes a case main body 44 having an intake air circulation portion 47 and an external sub chamber 112.
The external sub chamber 112 is formed as a sealed space outside the case body 44 by a blocking wall 110 extending from the case body 44. The motor 75 (motor unit 73) is disposed inside the external sub chamber 112.

According to the rough terrain vehicle of the fourth embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the rough terrain vehicle of the fourth embodiment, since the motor 75 is disposed inside the sealed external sub-chamber 112, the motor 75 is not directly exposed to the outside air, the heat of the engine 20, or the like. Therefore, according to the rough terrain vehicle of the fourth embodiment, a change in the environmental temperature (thermal shock) received by the motor 75 is small, and complicated temperature correction control is not necessary in the opening degree control of the throttle valve 70.

  Further, the motor 75 is not exposed to rain water or dust. Therefore, according to the rough terrain vehicle of the fourth embodiment, the motor 75 can be easily protected from an electrical short circuit caused by rainwater or the like.

[Fifth Embodiment]
A fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view (corresponding to FIG. 3) schematically showing the air cleaner provided in the rough terrain vehicle of the fifth embodiment of the present invention, as viewed from the left side.

  As shown in FIG. 8, in the air cleaner 41 </ b> D of the rough terrain vehicle of the fifth embodiment, the air cleaner case 43 includes a case main body 44 having an intake air circulation portion 47, a partition wall 102, and the partition wall 102. A first chamber 114 and a second chamber 115 which are partitioned inside. The partition wall 102 partitions the inside of the case main body 44 into a first chamber 114 and a second chamber 115 which are two spaces.

  The first chamber 114 has an air cleaner element 42 therein. The first chamber 114 communicates with the downstream end of the snorkel duct 60. The downstream end of the air cleaner element 42 in the flow path is connected to an opening (not shown) of the partition wall 102 and communicates with the second chamber 115. That is, the first chamber 114 is a so-called dirty side space. The second chamber 115 communicates with the opening 66a (upstream end) of the connecting tube 66. The second chamber 115 is a so-called clean side space.

The upstream side end portion of the connecting tube 66 extends gently and obliquely rearward and upward.
The motor 75 (motor unit 73) is disposed inside the second chamber 115. The motor 75 is disposed below the unit main body 74 and below the opening 66 a of the connecting tube 66.

According to the rough terrain vehicle of the fifth embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the rough terrain vehicle of the fifth embodiment, the motor 75 is disposed below the opening 66 a of the connecting tube 66. Therefore, according to the rough terrain vehicle of the fifth embodiment, when a component (for example, a screw) is dropped from the motor 75, the component remains at the bottom of the second chamber 115. Accordingly, it is possible to suppress the drop-off component from entering the inside of the connecting tube 66 from the opening 66a of the connecting tube 66 and entering the inside of the engine 20 (see FIG. 1).

[Sixth Embodiment]
A sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view (corresponding to FIG. 3) schematically showing the air cleaner provided in the rough terrain vehicle of the sixth embodiment of the present invention, as viewed from the left side.

  As shown in FIG. 9, the air cleaner 41E of the sixth embodiment includes the same air cleaner case 43 as the air cleaner case 43 (see FIG. 8) of the air cleaner 41D of the fifth embodiment. The main point of the air cleaner 41E of the sixth embodiment different from the air cleaner 41D of the fifth embodiment is that the motor 75 is disposed above the opening 66a of the connecting tube 66 and includes a heat dissipation cover 118. .

The heat dissipation cover 118 is a member that covers the entire motor unit 73 (motor 75). The heat radiating cover 118 is configured such that when a component (for example, a screw or the like) is removed from the motor 75, the removed component does not enter the inside of the connecting tube 66 from the opening 66a of the connecting tube 66.
The heat dissipation cover 118 is configured by a net-like thin plate (for example, an aluminum alloy mesh plate) having a high thermal conductivity.

According to the rough terrain vehicle of the sixth embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the rough terrain vehicle of the sixth embodiment, the motor 75 is covered with a heat dissipation cover 118. Therefore, according to the rough terrain vehicle of the sixth embodiment, when a component (for example, a screw) is dropped from the motor 75, the dropped component remains inside the heat dissipation cover 118. Accordingly, it is possible to suppress the drop-off component from entering the inside of the connecting tube 66 from the opening 66a of the connecting tube 66 and entering the inside of the engine 20 (see FIG. 1).

  The heat dissipation cover 118 is configured by a net-like thin plate having high thermal conductivity. Therefore, according to the rough terrain vehicle of the sixth embodiment, air permeability is ensured even if the motor 75 is covered with the heat dissipation cover 118. Therefore, the motor 75 can be cooled by the intake air.

[Seventh Embodiment]
The seventh embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a scooter-type vehicle having a low floor footrest portion will be described as an example of a saddle-ride type vehicle. FIG. 10 is a left side view showing the scooter type vehicle according to the seventh embodiment of the present invention. 11 is a plan view showing the rear portion of the scooter type vehicle shown in FIG. 12 is an enlarged view showing a rear portion of the scooter type vehicle shown in FIG.

  As shown in FIG. 10, the scooter type vehicle 201 of the present embodiment includes a body frame 205, a front wheel 202, a front fork 203 that pivotally supports the front wheel 202, a handle 204 connected to the front fork 203, and an internal combustion engine. Engine 220, rear wheel 217 as a drive wheel, power unit 235, cushion unit 265 for suspending power unit 235 on vehicle body frame 205, and throttle valve drive device 270 for driving throttle valve 236. Is done.

  The body frame 205 is configured by integrally joining a plurality of types of steel materials by welding or the like. As shown in FIG. 1, the vehicle body frame 205 includes a head pipe 206, a main frame 207, a pipe frame 208, a rear frame 209, a cross pipe 210, a pivot plate 211, a lower cross pipe 212, and a support arm. 213.

  As shown in FIG. 10, the head pipe 206 is disposed at the front end of the vehicle body frame 205 and supports a pair of front forks 203 that pivotally support the front wheels 202. The main frame 207 extends obliquely downward and rearward from the head pipe 206 and further extends substantially horizontally rearward in a side view. The pipe frame 208 is connected to the rear end portion of the main frame 207 and extends substantially horizontally in the left-right direction.

  A pair of rear frames 209 are provided on the left and right (see FIG. 11). The pair of rear frames 209 are connected to both ends of the pipe frame 208 in the left-right direction. The pair of rear frames 209 extends obliquely upward and rearward from the pipe frame 208 and further extends substantially horizontally rearward. The rear frame 209 on the left side has a bracket 209a that connects the upper ends of cushion units 265 (described later). The bracket 209a is formed in a plate shape and is provided so as to protrude downward from the rear frame 209.

The cross pipe 210 is provided at the rear portion of the rear frame 209 and connects the pair of rear frames 209 in the left-right direction (see FIG. 11).
A pair of pivot plates 211 are provided on the left and right. The pair of pivot plates 211 are fixed to the lower part of the rear frame 209.

  The lower cross pipe 212 spans a pair of pivot plates 211 in the left-right direction. The support arm 213 extends substantially horizontally rearward from the pivot plate 211 in a side view. The front end portion of the support arm 213 is rotatably connected to the lower cross pipe 212. A pivot shaft 214 is provided at the rear end of the support arm 213. A power unit 235 is connected to the pivot shaft 214 so as to be swingable up and down.

  As shown in FIG. 1, a pair of front forks 203 are provided on the left and right. The pair of front forks 203 is disposed in front of the head pipe 206 and substantially parallel to the head pipe 206. The upper ends of the pair of front forks 203 are connected to the lower end of the handle 4. The lower ends of the pair of front forks 203 rotatably support the front wheel 202.

  The cushion unit 265 connects the vehicle body frame 205 (rear frame 209) and a power unit 235 (described later), and suspends the power unit 235 from the vehicle body frame 205. The upper end portion of the cushion unit 265 is connected to the bracket 209a of the rear frame 209. The lower end of the cushion unit 265 is connected to a bracket 229a (see FIG. 12) at the rear end of the transmission 229.

  Next, the power unit 235 will be described in detail with reference to FIGS. 10 to 12. The power unit 235 shifts the driving force of the engine 220 and transmits it to the rear wheel 217 (rear wheel shaft 217a). The power unit 235 includes an engine 220 and a transmission 229 as a rear wheel support part. The engine 220 and the transmission 229 are integrally provided.

  The engine 220 is a prime mover (for example, a four-cycle single-cylinder air-cooled engine) of the scooter type vehicle 201, and is mounted at a substantially central portion of the vehicle body in the front-rear direction as shown in FIG. The engine 220 is arranged so that a crankshaft (not shown) extends along the left-right direction of the vehicle body.

  As shown in FIGS. 10 to 12, the engine 220 includes a cylinder head 221, a cylinder 225, a crankcase 227 that is fixed to the cylinder 225 and accommodates a crankshaft, an intake valve (not shown), and an exhaust valve. (Not shown), a valve operating mechanism (not shown) for operating an intake valve and an exhaust valve so as to be interlocked with an operation of a crankshaft (not shown), an intake portion 230 connected to the cylinder head 221, and And an exhaust part 240.

  A piston (not shown) is fitted inside the cylinder 225 so as to be able to reciprocate. The reciprocating motion of the piston is converted into rotational motion of a crankshaft (not shown) via a connecting rod (not shown). The output of the engine 220 is transmitted to the rear wheel shaft 217a of the rear wheel 217 via the transmission 229.

  The transmission 229 is disposed on the left end side in the vehicle width direction. The transmission 229 is a so-called belt type continuously variable transmission. The belt type continuously variable transmission includes a drive pulley (not shown) connected to a crankshaft (not shown) that is an output shaft of the engine 220, a driven pulley (not shown) connected to the rear wheel shaft 217a, and a drive. A V belt (not shown) wound around a pulley and a driven pulley is mainly configured. The belt-type continuously variable transmission controls the transmission ratio by continuously changing the winding diameter of the V belt around the driving pulley and the driven pulley.

  Details of the intake section 230 will be described later.

  As shown in FIG. 1, the exhaust unit 240 discharges exhaust from the engine 220 to the atmosphere. The exhaust part 240 includes an exhaust pipe 241a whose base end side is connected to the lower part of the cylinder head 221, and a silencer 242a connected to the rear end part of the exhaust pipe 241a. The exhaust pipe 241a is curved below the cylinder 225 and has a distal end extending rearward. The silencer 242a silences the exhaust sound and is disposed on the right side of the rear wheel 217.

Next, the intake section 230 will be described with reference to FIGS.
As shown in FIGS. 10 to 12, the intake section 230 supplies intake air to the engine 220. The intake section 230 is connected to the upper part of the cylinder head 221 and extends toward the rear of the vehicle. The intake pipe 231 (see FIG. 11), and the throttle body 233 (see FIG. 11) connected to the rear end of the inlet pipe 231. And an air cleaner 241 connected to the rear end (upstream end) of the throttle body 233 via a connecting tube 239.

  As shown in FIG. 12, the inlet pipe 231, the throttle body 233, the connecting tube 239, and the air cleaner 241 constitute an intake passage that supplies intake air to an intake port (not shown) of the engine 220. The inlet pipe 231 is provided with an injector (not shown) that injects fuel toward an intake valve (not shown) of the engine 220.

The throttle body 233 includes a throttle valve 236 and a throttle position sensor (not shown). The throttle valve 236 adjusts the amount of intake air flowing into the engine 220 by opening and closing the intake passage.
As shown in FIGS. 11 and 12, the throttle valve 236 is a so-called butterfly valve having a valve shaft 36a and rotating around the valve shaft 36a. The opening of the throttle valve 236 is controlled by a throttle valve driving device 270 (described later).

  The throttle position sensor detects the opening degree of the throttle valve 236 by detecting the rotation angle of the valve shaft 236a of the throttle valve 236. The throttle position sensor is connected to an electronic control unit (ECU) described later. The detection value (output signal) of the throttle valve 236 is output to the electronic control unit.

The air cleaner 241 forms a part of the intake passage and purifies intake air supplied to the engine 220 (see FIG. 12 and the like). The air cleaner 241 is connected to an intake port (not shown) of the engine 20 via a connecting tube 239 and an inlet pipe 231.
As shown in FIGS. 11 and 12, the air cleaner 241 includes an air cleaner element 242 and an air cleaner case 243.

  The air cleaner element 242 is a member that purifies (filters) the intake air. The air cleaner case 243 accommodates the air cleaner element 242. The air cleaner case 243 includes a case main body 244 and a case cover 245 that covers the case main body 244. The case main body 244 has an escape portion 299 that is recessed to prevent interference with the cushion unit 265 on the right side surface of the rear portion. The case main body 244 is fixed to the power unit 235 by screws (not shown). The case cover 245 is fixed to the case main body 244 with screws 301.

The air cleaner 241 (air cleaner case 243) configured as described above is disposed above the power unit 235 as shown in FIG. Specifically, the air cleaner case 243 is fixed to the upper part of the transmission 229.
An upstream end (rear end) of the connecting tube 239 is connected to a front portion of the air cleaner case 243 (case main body 244).

  Next, details of the throttle valve drive device 270 will be described with reference to FIGS. As shown in FIGS. 11 and 12, the throttle valve drive device 270 includes a motor 271 having a drive shaft 272, a drive pulley 273, a driven pulley 275, an endless belt 277, and a tensioner member 278 (see FIG. 12). And).

  The motor 271 has a drive shaft 272. The motor 271 is configured to be able to control the rotation angle of the drive shaft 272. An example of the motor 271 is a pulse motor.

The motor 271 is disposed inside the air cleaner case 243 so that the axial direction of the drive shaft 272 is along the vehicle width direction. Specifically, as shown in FIGS. 11 and 12, the motor 271 is disposed at a position higher than the connecting tube 239. Further, the motor 271 is disposed in front of the escape portion 299 of the case main body 244.
The motor 271 is connected to a motor drive circuit (not shown) and an electronic control unit (ECU) described later.

  As shown in FIGS. 11 and 12, the drive pulley 273 is configured in a disk shape having a predetermined diameter. The drive pulley 273 is connected to the drive shaft 272. The drive pulley 273 is a so-called toothed pulley having predetermined teeth on the outer peripheral surface of the disk.

  The driven pulley 275 is a toothed pulley having the same shape as the driving pulley 273 and is connected to the valve shaft 236 a of the throttle valve 236. The driven pulley 275 has a larger diameter than the driving pulley 273.

  The belt 277 is a timing belt configured endlessly by an elastic member such as rubber. The belt 277 has belt teeth (not shown) meshing with teeth (not shown) of the driving pulley 273 and teeth (not shown) of the driven pulley 275 on the inner peripheral surface. The belt 277 is wound around the driving pulley 273 and the driven pulley 275, and transmits the rotational driving force of the driving shaft 272 to the valve shaft 236a.

  The tensioner member 278 adjusts the tension of the belt 277 as shown in FIG. The tensioner member 278 is connected to the upper portion of the crankcase 227. The tensioner member 278 includes an arm portion 279, a roller portion 280, and an urging member 281. The arm part 279 is a rectangular plate member. A base end portion of the arm portion 279 is swingably connected to an upper portion of the crankcase 227. A roller portion 280 is rotatably supported at the distal end portion of the arm portion 279.

  The biasing member 281 is provided at the base end portion of the arm portion 279. The biasing member 281 presses the roller portion 280 against the belt 277 by biasing the arm portion 279. Examples of the urging member 281 include a torsion coil spring. One end of the torsion coil spring is fixed to the upper portion of the crankcase 227, and the other end of the torsion coil spring is fixed to the base end portion of the arm portion 279.

  According to the tensioner member 278 configured as described above, the belt 277 is prevented from being loosened. Therefore, the belt 277 can properly mesh with the driving pulley 273 and the driven pulley 275, and the driving force of the motor 271 is accurately transmitted to the valve shaft 236a of the throttle valve 236.

According to the scooter type vehicle 201 of the seventh embodiment, the same effects as the rough terrain vehicle 1 of the first embodiment are exhibited, and the following effects are also achieved.
In the scooter type vehicle 201 of the seventh embodiment, the drive pulley 273 connected to the motor 271, the driven pulley 275 connected to the throttle valve 236, the drive pulley 273 and the driven pulley 275 are wound around the motor 271. An endless belt 277 that transmits the rotational driving force to the throttle valve 236.
Therefore, according to the scooter type vehicle 201 of the seventh embodiment, since the driving pulley 273 and the driven pulley 275 are connected by the belt 277, the motor 271 and the throttle valve 236 can be connected with a simple structure. it can.

  Further, according to the scooter type vehicle 201 of the seventh embodiment, since the driving pulley 273 and the driven pulley 275 are connected by the belt 277, the layout of the motor 271 and the throttle valve 236 can be easily adjusted, and the degree of freedom in design. Can be increased.

  Further, in the scooter type vehicle 201 of the seventh embodiment, the air cleaner case 243 is disposed above the power unit 235, the connecting tube 239 as an intake passage is connected to the front portion of the air cleaner case 243, and the motor 271 is It is arranged at a position higher than the connecting tube 239.

  Therefore, according to the scooter type vehicle 201 of the seventh embodiment, the belt 277 can cross over the connecting tube 239, and interference between the belt 277 and the connecting tube 239 can be prevented.

  The scooter type vehicle 201 of the seventh embodiment further includes a cushion unit 265 that connects the vehicle body frame 205 and the power unit 235 and suspends the power unit 235 from the vehicle body frame 205, and the air cleaner case 243 includes a rear part thereof. The motor 271 is disposed in front of the escape portion 299.

  Therefore, according to the scooter type vehicle 201 of the seventh embodiment, the cushion unit 265 disposed in the escape portion 299 and the motor 271 disposed in the air cleaner case 243 are not overlapped in the left-right direction of the vehicle body. be able to. Accordingly, the motor 271 and the cushion unit 265 can be disposed inside the vehicle body, and the vehicle width can be reduced.

[Eighth Embodiment]
The eighth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a left side view illustrating a schematic configuration of a throttle valve driving device provided in a scooter type vehicle according to an eighth embodiment of the present invention.

  The basic configuration of the scooter type vehicle of the eighth embodiment is the same as that of the scooter type vehicle 201 of the seventh embodiment. The difference from the seventh embodiment is the configuration of the throttle valve driving device. Therefore, in the following description, a detailed description of the scooter type vehicle is omitted, and the configuration of the throttle valve driving device will be described focusing on differences from the throttle valve driving device 270 of the seventh embodiment.

  As shown in FIG. 13, the throttle valve drive device 270A includes a motor 271 having a drive shaft 272, a drive pulley 273a, a driven pulley 275a, a pair of wire cables 283, and a pair of wire cable guide members 284. Prepare. The drive pulley 273a is configured in a disk shape with a predetermined diameter. The drive pulley 273 a is connected to the drive shaft 272 of the motor 271. The driven pulley 275a is configured in a disk shape with a predetermined diameter. The driven pulley 275a is connected to the valve shaft 236a of the throttle valve 236. The driven pulley 275a has a larger diameter than the driving pulley 273a.

  A pair of wire cables 283 are provided on the top and bottom. The pair of wire cables 283 has one end (rear end) coupled to the drive pulley 273a and the other end (front end) coupled to the driven pulley 275a. The wire cable 283 transmits the rotational driving force of the motor 271 to the throttle valve 236.

The wire cable guide member 284 includes a guide tube 284 a that guides the pair of wire cables 283. The wire cable guide member 284 and the guide tube 284a are configured such that the wire cable 283 can be inserted therethrough. A pair of wire cable guide members 284 are provided.
The wire cable guide member 284 is disposed so as to be separated from the front and rear, and is disposed so as to intersect with the pair of wire cables 283. The wire cable guide member 284 can be fixed to any part of the vehicle body (for example, a predetermined stay member extended from the crankcase 227).

  Since the basic operation of the throttle valve drive device 270A of the eighth embodiment is substantially the same as the operation of the throttle valve drive device 270 of the seventh embodiment, a duplicate description is omitted.

According to the scooter type vehicle of the eighth embodiment, the same effects as the scooter type vehicle of the seventh embodiment are exhibited, and the following effects are exhibited.
In the scooter type vehicle of the eighth embodiment, a driving pulley 273 connected to the motor 271, a driven pulley 275 connected to the throttle valve 236, one end connected to the driving pulley 273 a and the other end driven to the driven pulley 275 a. And a pair of wire cables 283 that transmit the rotational driving force of the motor 271 to the throttle valve 236.

  Therefore, according to the scooter type vehicle of the eighth embodiment, since the drive pulley 273 and the driven pulley 275 are connected by the pair of wire cables 283, the motor 271 and the throttle valve 236 are connected with a simple structure. be able to.

  Further, according to the scooter type vehicle of the eighth embodiment, since the drive pulley 273 and the driven pulley 275 are connected by the pair of wire cables 283, the layout of the motor 271 and the throttle valve 236 can be easily adjusted, The degree of freedom can be increased.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with a various form.
For example, in the first to sixth embodiments, the motor 75 and the throttle valve 70 are integrally configured, but the present invention is not limited to this. The motor 75 and the throttle valve 70 may be configured separately.

  Further, in the first to sixth embodiments, the present invention is applied to a four-wheel rough terrain vehicle as a saddle-ride type vehicle, and in the seventh and eighth embodiments. The present invention is applied to a scooter type vehicle as a saddle type vehicle, but is not limited to this. For example, the present invention may be applied to a three-wheel straddle-type vehicle or a motorcycle other than a scooter-type vehicle. That is, the saddle riding type vehicle includes all vehicles that ride on the vehicle body.

1 Rough terrain vehicle (saddle-type vehicle)
20 engine (internal combustion engine)
41A, 41B, 41C, 41D, 41E Air cleaner 42 Air cleaner element 43 Air cleaner case 44 Case body 47 Intake flow passage 61 First flow passage 62 Second flow passage 62a End portion 66 Connecting tube (intake passage)
70 Throttle Valve 71 Valve Shaft 75 Motor 102 Partition Wall 104 Internal Subchamber 110 Blocking Wall 112 External Subchamber 201 Scooter Type Vehicle (Saddle Type Vehicle)
205 Body frame 217 Rear wheel 220 Engine (internal combustion engine)
229 Transmission (rear wheel support)
231 Inlet pipe (intake passage)
235 Power unit 236 Throttle valve 239 Connecting tube (intake passage)
241 Air cleaner 242 Air cleaner element 243 Air cleaner case 244 Case body 271 Motor 272 Drive shaft 273, 273a Drive pulley 275, 275a Driven pulley 277 Belt 283 Wire cable 299 Escape part

Claims (3)

An internal combustion engine;
An air cleaner having an air cleaner element for purifying the intake air sucked from the outside and an air cleaner case capable of accommodating the air cleaner element;
An intake passage that connects the internal combustion engine and the air cleaner case and distributes intake air purified by the air cleaner element toward the internal combustion engine;
A throttle valve that is provided in the intake passage and adjusts the flow rate of intake air;
A motor that is a power source for opening and closing the throttle valve;
In a saddle-ride type vehicle comprising:
The air cleaner case includes an intake air circulation part through which intake air circulates,
The intake circulation portion includes a first circulation passage through which intake air sucked from outside mainly circulates, and an intake air having a smaller amount than the intake air flowing through the first circulation passage, and a downstream end portion A second flow passage extending inside the air cleaner case,
The motor is a straddle-type vehicle that is disposed in the vicinity of an end portion on the downstream side of the second circulation passage or disposed in the second circulation passage . 2. The straddle-type vehicle according to claim 1, wherein the motor is disposed at a position where the intake air flowing through the second circulation passage directly hits. The straddle-type vehicle according to claim 1 or 2 , wherein the motor is configured integrally with the throttle valve.

Images