WO2015141749A1 - 鞍乗型車両 - Google Patents

鞍乗型車両 Download PDF

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Publication number
WO2015141749A1
WO2015141749A1 PCT/JP2015/058141 JP2015058141W WO2015141749A1 WO 2015141749 A1 WO2015141749 A1 WO 2015141749A1 JP 2015058141 W JP2015058141 W JP 2015058141W WO 2015141749 A1 WO2015141749 A1 WO 2015141749A1
Authority
WO
WIPO (PCT)
Prior art keywords
throttle
vehicle
throttle motor
engine
chain tensioner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/058141
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
康夫 直井
哲太 市川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Hitachi Astemo Ltd
Original Assignee
Honda Motor Co Ltd
Keihin Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd, Keihin Corp filed Critical Honda Motor Co Ltd
Priority to CN201580014545.0A priority Critical patent/CN106103943B/zh
Priority to EP15765033.4A priority patent/EP3121421B1/en
Publication of WO2015141749A1 publication Critical patent/WO2015141749A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2202/00—Motorised scooters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles

Definitions

  • the present invention relates to a straddle-type vehicle in which the opening degree of a throttle valve is controlled by a throttle motor.
  • straddle-type vehicles such as scooter-type vehicles and the like
  • a device in which the operation amount of an operating element such as a throttle grip is detected by a sensor and the opening of the throttle valve is controlled based on the detected value.
  • a throttle motor is connected to the throttle valve via a reduction mechanism, and the throttle motor is controlled by the control device based on the detection signal of the sensor.
  • the engine is vertically movably supported by the vehicle body frame below the seat, and the cylinder portion of the engine extends forward from the crankcase toward the vehicle body.
  • a structure in which the intake passage is connected to the upper surface side of the may be employed.
  • the throttle valve is disposed in the middle of the intake passage which is piped along the upper surface of the cylinder portion of the engine, and the throttle motor is disposed in the vicinity of the throttle valve.
  • the front end portion of the intake passage curves downward and is connected to the upper surface of the cylinder portion, the throttle motor partially overlaps the intake passage in plan view of the vehicle, and the vehicle It is arrange
  • the throttle motor is disposed by effectively utilizing the dead space between the upper surface of the cylinder portion and the intake passage, and the layout of the functional components around the engine is not easily restricted.
  • part of a chain tensioner which is a component for adjusting the tension of a timing chain in the engine, is from the upper surface of the cylinder portion It may be arranged to project upward.
  • the throttle motor is to be disposed at a position sandwiched between the upper surface of the cylinder portion and the intake passage as described above, the throttle motor is likely to approach the chain tensioner. For this reason, in order to avoid proximity of the throttle motor and the chain tensioner, it is necessary to arrange the intake passage on the upper side, and the layout of functional parts around the engine is limited.
  • An aspect according to the present invention is a saddle-ride type vehicle capable of increasing the freedom of layout of functional parts around the engine by enabling the throttle motor to be disposed above the engine with an appropriate distance from the chain tensioner. Intended to provide.
  • the straddle-type vehicle includes an engine attached to a vehicle body frame such that a cylinder portion extends toward the front of the vehicle body; An intake passage extending from the front end portion to be curved downward and connected to an intake port of the cylinder portion; a throttle valve provided in the intake passage for adjusting an intake amount flowing through the intake passage; and the throttle valve A throttle motor for driving the engine, and a chain tensioner for adjusting the tension of the timing chain in the engine, a part of which projects upward from the top surface of the cylinder, and the throttle
  • the straddle-type vehicle is disposed so as to overlap with the upper surface of the cylinder portion in a plan view, and the throttle motor is configured in a side view of the vehicle, At a position between the upper surface of the engine and the intake passage, a horizontal line passing through the lower end of the throttle motor overlaps the chain tensioner and an axial center of the throttle motor is displaced in
  • the throttle motor is disposed so that the horizontal line passing through the lower end overlaps the chain tensioner, and the axial center of the throttle motor is offset from the chain tensioner in the front-rear direction. It will be arranged compactly by efficiently using the space of.
  • the throttle motor may be disposed between the front wall protruding upward from the top surface of the crankcase in the vehicle longitudinal direction and the chain tensioner.
  • the height position of the intake passage is kept low because the throttle motor can be arranged utilizing a small space between the front wall protruding upward from the upper surface of the crankcase and the chain tensioner. be able to.
  • the engine may be swingably supported by the vehicle body frame in the vertical direction via the lower front edge portion of the crankcase.
  • the support position of the engine does not approach the intake passage or the throttle motor as in the case where the upper front edge of the engine is supported by the vehicle body frame so as to be able to swing up and down. For this reason, the arrangement space of the throttle motor can be secured more easily.
  • the throttle motor is connected to the throttle valve so as to be able to transmit power via a reduction mechanism
  • the reduction mechanism is a plan view of the vehicle It may be disposed on the opposite side of the maximum protrusion of the chain tensioner with respect to the axis of the intake passage.
  • the throttle valve is disposed above the upper surface of the cylinder portion, and the axial center of the throttle motor is above the crankcase of the engine. It may be arranged in
  • the front end side of the intake passage can be arranged closer to the upper surface of the cylinder portion.
  • the crankcase of the engine is provided with an exhaust port of a radiator attached to the crankcase projecting upward, and the throttle motor is You may arrange
  • the throttle motor is compactly disposed by utilizing the dead space between the exhaust port of the radiator and the chain tensioner.
  • At least a part of the throttle motor overlaps with at least a part of a portion excluding the largest projecting portion of the chain tensioner in plan view of the vehicle. It may be arranged as
  • the portion of the intake passage from the front end portion connected to the cylinder portion to the midway portion where the throttle motor is disposed is meandering in the vehicle width direction and piping is performed.
  • the intake passage can be easily set to the optimum pipe length while maintaining an appropriate distance between the motor and the chain tensioner.
  • the throttle motor is disposed so that the horizontal line passing through the lower end overlaps the chain tensioner and the axial center of the throttle motor is offset from the chain tensioner in the front-rear direction in a side view of the vehicle.
  • the throttle motor will be compactly disposed between the top surface of the engine and the intake passage, maintaining a proper spacing with the chain tensioner. Therefore, according to the aspect which concerns on this invention, an intake passage can be closely approached to an engine and the freedom degree of the layout of the functional component around an engine can be raised.
  • FIG. 1 is a left side view of a straddle-type vehicle according to an embodiment of the present invention. It is the right side view which removed some parts of the straddle-type vehicle concerning the embodiment of the present invention.
  • FIG. 1 is a plan view of a straddle-type vehicle according to an embodiment of the present invention with parts removed. 1 is a right side view of a power unit of a straddle-type vehicle according to an embodiment of the present invention. 1 is a plan view of a power unit of a straddle-type vehicle according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of a power unit portion of a straddle-type vehicle according to an embodiment of the present invention as viewed from the upper right front side.
  • arrow FR points to the front of the vehicle
  • arrow UP points to the upper side of the vehicle
  • arrow LH points to the left of the vehicle.
  • FIG. 1 is a view showing a left side surface of a scooter type motorcycle (a straddle-type vehicle) 1 as a straddle-type vehicle according to an embodiment of the present invention
  • FIG. It is a figure showing the right side of the second half part of motorcycle 1 which removed parts.
  • FIG. 3 is a top view of the central region of the motorcycle 1 with some parts removed.
  • a steering system including a front wheel 6 and a steering handle 10 is supported at the front of a body frame 11, and an engine 2 and a power transmission device 3 are integrally block at the center of the body frame 11.
  • the power unit 4 is supported, and a seat 17 for seating an occupant is supported at the rear of the vehicle body frame 11.
  • the front end side of the power unit 4 is supported by the vehicle body frame 11 so as to be vertically pivotable, and the rear wheel 5 is supported at a rear end portion so as to transmit power.
  • the motorcycle 1 of the present embodiment adopts a so-called unit swing type rear wheel support structure in which the power unit 4 and the rear wheel 5 are swingably supported by the vehicle body frame 11.
  • a cushion unit 40 is interposed between the rear end of the power unit 4 and the vehicle body frame 11.
  • the body frame 11 is connected to the head pipe 12 rotatably supporting the steering shaft 9, the down frame 13 extending obliquely downward from the head pipe 12, and the left and right sides of the lower edge of the down frame 13. After extending rearward, it is connected to a pair of left and right side frames 14 and 14 extending diagonally upward to the rear, and to the rear upper ends of the side frames 14 and 14, and the tilt angle with the rear of the side frames 14 and 14 And a pair of left and right seat frames 15 and 15 extending obliquely upward at the rear. Further, as shown in FIGS. 2 and 3, in the vicinity of the rear upper end of the left and right side frames 14, 14, the front and rear side frames are curved in an arc while being inclined toward the front and obliquely upward. A cross frame 49 is connected which interconnects 14 and 14. The front end portions of the left and right seat frames 15 extend forward with respect to the connecting portion with the side frames 14, and the front extending end is connected to the middle portion of the cross frame 49.
  • the left and right front forks 7, 7 rotatably supporting the front wheel 6 are held via the bridge member 8, and the steering handle 10 is integrally formed at the upper end. It is attached.
  • a storage box 34 capable of storing an article such as a helmet is disposed between the left and right seat frames 15, 15.
  • the storage box 34 is attached to the left and right seat frames 15, 15 with the opening facing upward.
  • a long sheet 17 also serving as a lid of the storage box 34 is rotatably attached to the upper portion of the storage box 34 with the front end as a pivot.
  • the foot cushioning space 19 is a space through which the occupant passes the foot when riding on and off the motorcycle 1, and a step for the occupant sitting on the seat 17 to put his foot under the left and right sides of the foot cushioning space 19
  • Floors 20 and 20 are provided.
  • the step floors 20, 20 are disposed above the left and right side frames 14, 14 of the vehicle body frame 11, and foot load is supported by the side frames 14, 14.
  • FIG. 4 is a diagram showing the right side surface of the power unit 4
  • FIG. 5 is a diagram showing the upper surface of the power unit 4.
  • 6 is a view of the power unit 4 and a part of the vehicle body frame 11 as viewed from the upper right side.
  • the engine 2 is disposed on the front side, and the power transmission device 3 is connected to the left side rear side of the engine 2.
  • a support for the rear wheel 5 is provided at the rear end of the power transmission device 3, and an air cleaner 41 constituting an intake system of the engine 2 is provided above the power transmission device 3.
  • the engine 2 is a cylinder block (cylinder portion) 36 in which a piston (not shown) is slidably housed, and a cylinder head connected to one end of the cylinder block 36 to form a combustion chamber (not shown) between the cylinder block 36 and A head cover (cylinder portion) 38 mounted on the cylinder portion 37 and the cylinder head 37 and accommodating the valve mechanism of the intake and exhaust valves between the cylinder head 37 and a crank coupled to the other end of the cylinder block 36 And a case 35.
  • a crankcase 35 accommodates therein a crankshaft 30, which converts a piston advancing / retracting operation into a rotational operation and outputs it, and the left end of the crankshaft 30 can transmit power to the input portion of the power transmission 3 ing.
  • the cylinder block 36, the cylinder head 37, and the head cover 38 constitute a cylinder portion of the engine 2.
  • a cam shaft 31 interlocking with engine rotation (rotation of the crankshaft 30) is supported on the upper portion of the cylinder head 37, and a cam (not shown) provided on the cam shaft 31.
  • the intake and exhaust valves are opened and closed at predetermined timings.
  • the cylinder portion of the engine 2 protrudes toward the front side of the vehicle body while being slightly inclined upward from the crankcase 35.
  • a pair of support pieces 35A projecting toward the front side of the vehicle body is extended.
  • the support pieces 35A are disposed at two places separated in the vehicle width direction of the crankcase 35.
  • the other ends of link members 14A, 14A whose one end is connected to the left and right side frames 14, 14 are rotatably connected to these supporting pieces 35A.
  • the front end side of the power unit 4 including the engine 2 is vertically movably supported by the vehicle body frame 11 through the link members 14A and 14A.
  • part of the head cover 38 of the engine 2 and the cylinder head 37 are left and right side frames It protrudes to the vehicle body front side from between the rising parts on the rear end side of 14 and 14.
  • the head cover 38 and a part of the cylinder head 37 protruding from between the rear end side rising portions of the left and right side frames 14, 14 are the front edge of the left and right seat frames 15, 15 and the cross frame 49. It is located in the enclosed space.
  • An intake port (not shown) is provided on the upper surface side of the cylinder head 37 in the cylinder portion, and an exhaust port (not shown) is provided on the lower surface side of the cylinder head 37.
  • a front end portion of an inlet pipe (intake passage) 21 is connected to the intake port, and a connecting tube (intake passage) 23 is connected to a rear end side of the inlet pipe 21 via a throttle body (intake passage) 22.
  • a front end portion of an exhaust pipe (not shown) is connected to the exhaust port, and a rear end portion of the exhaust pipe is drawn from the lower side of the power unit 4 to the rear side of the vehicle body and connected to a muffler (not shown).
  • the throttle body 22 has a throttle valve 24 (only a pivot axis of the throttle valve is shown in the drawing) for opening and closing an internal passage (intake passage), and an opening degree for detecting the opening degree of the throttle valve 24 A sensor 25 is provided. Further, the throttle body 22 incorporates a throttle motor 26 for rotationally driving the throttle valve 24 and a reduction mechanism 27 for decelerating the rotation of the throttle motor 26 and transmitting it to the throttle valve 24.
  • the opening degree signal of the throttle valve 24 detected by the opening degree sensor 25 is input to a signal input portion of a control device (not shown) that controls the drive of the throttle motor 26.
  • the control device receives an operation signal of a throttle operator (not shown) provided on the steering handle 10, an opening signal of the opening sensor 25 and various other signals, and makes the intake opening of the throttle valve 24 appropriate.
  • the drive control of the throttle motor 26 is performed to adjust the opening degree.
  • a fuel injection valve 28 for injecting fuel into a passage (intake passage) in response to a control signal from the control device is disposed in the vicinity of a connection portion between the inlet pipe 21 and the cylinder head 37.
  • reference numeral 28 a is a fuel supply pipe connected to the fuel injection valve 28.
  • the inlet pipe 21, the internal passage of the throttle body 22, and the connecting tube 23 constitute an intake passage of the engine 2.
  • the inlet pipe 21 is gently inclined downward from above the cylinder block 36 to above the cylinder head 37, and is sharply curved downward in the vicinity of the straight upper portion of the intake port on the cylinder head 37 to form the intake port. It is connected.
  • the throttle body 22 connected to the rear end of the inlet pipe 21 is disposed straddling above the upper surfaces of the cylinder head 37 and the crankcase 35, and the connecting tube 23 connected to the rear end of the throttle body 22 is It is connected to the air cleaner 41 via the upper side of the upper surface of the crankcase 35.
  • the throttle valve 24 in the throttle body 22 is disposed at a position overlapping the upper surface of the cylinder block 36 (cylinder portion) in a plan view of the vehicle.
  • the throttle motor 26 integrally assembled to the throttle body 22 is disposed at a position below the axial center position of the throttle valve 24 in the throttle body 22 and biased to the rear lower side.
  • each axial center of the throttle valve 24 and the throttle motor 26 is disposed to be substantially orthogonal to an axial center 22 C of a passage (intake passage) in the throttle body 22.
  • the speed reduction mechanism 27 for decelerating the rotation of the throttle motor 26 and transmitting it to the throttle valve 24 is disposed at a position biased to the left side of the vehicle body across the shaft center 22C of the passage (intake passage) in the throttle body 22.
  • crankshaft 30 in the crankcase 35 and the camshaft 31 at the upper portion of the cylinder head 37 are linked to be interlockable by the timing chain 32 inside the engine 2.
  • sprockets (not shown) are attached to the crankshaft 30 and the camshaft 31, respectively, and the timing chain 32 is stretched around both sprockets.
  • the timing chain 32 is disposed at a position biased to the right of the vehicle across a center line C1 of the cylinder block 36 in the vehicle width direction in plan view of the vehicle.
  • a chain tensioner 33 for adjusting the tension of the timing chain 32 is installed at an upper position of the passage chain of the timing chain 32 on the upper wall of the cylinder block 36.
  • a portion of the chain tensioner 33 protrudes upward from the upper surface of the cylinder block 36, and the tension of the timing chain 32 can be adjusted from the outside of the engine 2 by operating the protruding portion with a tool or the like.
  • the largest projecting portion 33a of the chain tensioner 33 to the upper side is located substantially at the center of the chain tensioner 33 in a plan view of the vehicle.
  • the throttle valve 24 in the throttle body 22 is disposed slightly forward of the maximum projection 33 a of the chain tensioner 33 on the cylinder block 36. Further, the throttle motor 26 integrally assembled to the throttle body 22 is located between the upper surface of the engine 2 and the internal passage (intake passage) of the throttle body 22 in a side view of the vehicle.
  • the horizontal line H1 passing through the lower end of the throttle motor 26 vertically overlaps the chain tensioner 33, and the axial center portion 26a of the throttle motor 26 is a chain as shown in FIG. It is disposed at the rear side of the tensioner 33 at a position shifted by a predetermined amount.
  • the throttle motor 26 is disposed at a position between the front wall 35 a protruding upward from the upper surface of the crankcase 35 and the chain tensioner 33 on the cylinder block 36 in the vehicle longitudinal direction.
  • the throttle motor 26 partially overlaps the rear side region (region shifted from the maximum protrusion 33a) of the maximum protrusion 33a on the chain tensioner 33 in plan view. Is located in
  • the front end portion of the inlet pipe 21 is connected to the air inlet at a position biased to the left side of the vehicle across the center line C1 in the vehicle width direction of the cylinder block 36 in the upper surface of the cylinder head 37.
  • the internal passage of the inlet pipe 21 and the throttle body 22 is inclined diagonally to the right from the connecting portion with the cylinder head 37 on the front end side of the inlet pipe 21 across the center line C1. Therefore, the axial center 22C of the internal passage of the throttle body 22 in which the throttle valve 24 is disposed is inclined obliquely rearward to the right in a plan view of the vehicle.
  • the axial center 22 C of the internal passage of the throttle body 22 extends rearward across the left side of the maximum projection 33 a of the chain tensioner 33.
  • the reduction gear mechanism 27 in the throttle body 22 is disposed on the opposite side of the largest projecting portion 33a of the chain tensioner 33 across the shaft center 22C of the internal passage in a plan view of the vehicle.
  • the air cleaner 41 to which the rear end of the connecting tube 23 is connected is, as shown in FIG. 3, the left side of the largest projecting portion 33a of the chain tensioner 33 in the same manner as the front end of the inlet pipe 21 in plan view of the vehicle. Is located in Therefore, at the rear end of the throttle body 22 where the axial center 22C of the internal passage is inclined to the right rear side with respect to the center line C1 of the cylinder block 36 in the vehicle width direction, the front end of the connecting tube 23 is The parts are connected in a large serpentine manner in the horizontal direction.
  • the connecting tube 23 meanders in the vehicle width direction larger than the deviation of the connection portion on the air cleaner 41 side and the connection portion on the throttle body 22 side in the vehicle width direction.
  • a radiator 50 for cooling the engine cooling water is attached to the right end of the crankcase 35 of the engine 2.
  • the radiator 50 is not shown in the drawings other than FIG.
  • reference numeral 43 in the figure is a radiator base integrally provided on the crankcase 35 for attaching the radiator 50.
  • the upper portion of the radiator base 43 protrudes upward from the upper surface of the general portion of the crankcase 35.
  • an exhaust port 43a for exhausting the air that has cooled the radiator 50 to the vehicle body rear side through the upper side of the general surface of the crankcase 35 is provided.
  • the throttle motor 26 integrally assembled to the throttle body 22 is positioned above the upper surface of the general portion of the crankcase 35, and a front wall 35a protruding upward from the upper surface of the crankcase 35 (FIGS. 3 and 4) It is located forward of the reference). Further, the throttle motor 26 is disposed adjacent to the front side of the exhaust port 43a of the crankcase 35 in the vehicle body. Therefore, the throttle motor 26 is disposed at a position adjacent to the vehicle body front side of the air outlet 43a and adjacent to the vehicle body rear side of the chain tensioner 33 in a side view of the vehicle.
  • the horizontal line H1 passing through the lower end of the throttle motor 26 vertically overlaps the chain tensioner 33 when the throttle motor 26 provided on the throttle body 22 is viewed from the side of the vehicle. Since the axial center portion 26a of the throttle motor 26 is disposed so as to be offset from the chain tensioner 33 in the front-rear direction (offset to the rear side of the chain tensioner 33), the throttle motor 26 is properly spaced from the chain tensioner 33. Can be compactly disposed between the upper surface of the engine 2 and the intake passage. Therefore, in the motorcycle 1 of the present embodiment, the intake passage can be brought close to the engine 2 to increase the degree of freedom of the layout of the functional components around the engine 2 such as the storage box 34 and the like.
  • the throttle motor 26 is disposed utilizing a slight space in the vehicle longitudinal direction sandwiched by the front wall 35a protruding upward from the upper surface of the crankcase 35 and the chain tensioner 33. Therefore, the height position of the intake passage can be kept lower.
  • the power unit 4 is supported by the vehicle body frame 11 so as to be capable of moving up and down by the support piece 35A protruding from the lower front edge of the crankcase 35.
  • the pivotal position of the power unit 4 is separated from the intake passage and the throttle motor 26 as compared with the case where the upper front edge of the power unit 4 is supported by the vehicle body frame 11 so as to be able to swing up and down. Therefore, by adopting this support structure of the power unit 4, the arrangement space for the throttle motor 26 can be secured more easily.
  • the reduction mechanism 27 in the throttle body 22 is opposite to the largest projecting portion 33a of the chain tensioner 33 across the shaft center 22A in the throttle body 22 in plan view of the vehicle. Because of the arrangement, the projecting portions of the large volume reduction mechanism 27 and the chain tensioner 33 can be arranged apart from each other. Therefore, adopting this arrangement makes it possible to arrange the intake passage closer to the top surface of the engine 2.
  • the throttle valve 24 is disposed above the upper surface of the cylinder block 36, and the axial center 26a of the throttle motor 26 is disposed above the upper surface of the general portion of the crankcase 35.
  • the front end side of the intake passage can be disposed closer to the upper surface of the cylinder block 36 and the cylinder head 37 Become. Therefore, adopting this structure is advantageous in bringing the intake passage close to the upper surface of the engine 2.
  • the throttle motor 26 is disposed so as to overlap a part of the chain tensioner 33 at a position shifted from the maximum projecting portion 33 a of the chain tensioner 33 in plan view. While securing the separation distance between the throttle motor 26 and the chain tensioner 33, the intake passage can be easily set to the optimum pipe length by meandering the intake passage. Therefore, the intake efficiency of the engine 2 can be easily enhanced by adopting this structure.
  • the present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention.
  • the throttle motor 26 is integrally assembled to the block of the throttle body 22, the throttle motor 26 may be configured separately from the block that accommodates the throttle valve 24.
  • the straddle-type vehicle in the present specification includes all vehicles on which a driver straddles a vehicle body.
  • the straddle-type vehicle in this specification includes not only motorcycles (including motor bikes and scooter-type vehicles) but also three-wheeled vehicles (including one front and two rear wheels as well as front two and rear one wheels) or Also includes four-wheeled vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
PCT/JP2015/058141 2014-03-20 2015-03-18 鞍乗型車両 Ceased WO2015141749A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580014545.0A CN106103943B (zh) 2014-03-20 2015-03-18 跨骑型车辆
EP15765033.4A EP3121421B1 (en) 2014-03-20 2015-03-18 Straddled vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014059069A JP6155213B2 (ja) 2014-03-20 2014-03-20 鞍乗型車両
JP2014-059069 2014-03-20

Publications (1)

Publication Number Publication Date
WO2015141749A1 true WO2015141749A1 (ja) 2015-09-24

Family

ID=54144713

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/058141 Ceased WO2015141749A1 (ja) 2014-03-20 2015-03-18 鞍乗型車両

Country Status (4)

Country Link
EP (1) EP3121421B1 (enExample)
JP (1) JP6155213B2 (enExample)
CN (1) CN106103943B (enExample)
WO (1) WO2015141749A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018029822A1 (ja) * 2016-08-10 2018-02-15 本田技研工業株式会社 鞍乗り型車両

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019186923A1 (ja) * 2018-03-29 2019-10-03 本田技研工業株式会社 鞍乗り型車両
JP6975316B2 (ja) * 2018-03-29 2021-12-01 本田技研工業株式会社 鞍乗り型車両
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