WO2016052005A1 - Moteur à combustion interne de véhicule du type à selle - Google Patents

Moteur à combustion interne de véhicule du type à selle Download PDF

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Publication number
WO2016052005A1
WO2016052005A1 PCT/JP2015/073781 JP2015073781W WO2016052005A1 WO 2016052005 A1 WO2016052005 A1 WO 2016052005A1 JP 2015073781 W JP2015073781 W JP 2015073781W WO 2016052005 A1 WO2016052005 A1 WO 2016052005A1
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WO
WIPO (PCT)
Prior art keywords
intake
internal combustion
combustion engine
saddle
air cleaner
Prior art date
Application number
PCT/JP2015/073781
Other languages
English (en)
Japanese (ja)
Inventor
正樹 長
大 片岡
紘也 中澤
政秀 味村
Original Assignee
本田技研工業株式会社
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
Priority claimed from JP2014201433A external-priority patent/JP6347445B2/ja
Priority claimed from JP2014201434A external-priority patent/JP6379387B2/ja
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to CN201580053154.XA priority Critical patent/CN106794883B/zh
Publication of WO2016052005A1 publication Critical patent/WO2016052005A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J40/00—Arrangements of air cleaners specially adapted for cycles
    • 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
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels

Definitions

  • the present invention relates to an engine disposed below a main frame in a vehicle body frame having a head pipe that supports the steering handle in a steerable manner and a main frame that is inclined rearwardly downward from the head pipe and extends rearward.
  • a main body is mounted with a cylinder axis inclined forward, and a part of an intake passage connecting an air cleaner disposed between a cylinder head and a main frame constituting a part of the engine main body and an intake port of the cylinder head is provided.
  • the present invention relates to a saddle-ride type vehicle internal combustion engine in which a fuel injection valve is attached to the front side of an intake passage forming member to be formed.
  • An engine body with the cylinder axis inclined forward is mounted on a backbone-type body frame, and an air cleaner arranged between the main frame and the cylinder head of the body frame is connected to the intake of the cylinder head via the connecting tube, throttle body, and intake pipe.
  • An internal combustion engine for a saddle-ride type vehicle connected to a port is known from Patent Document 1.
  • the fuel injection valve is attached to the throttle body, and the fuel injection direction of the fuel injection valve is directed to the intake port to suppress fuel adhesion to the inner surface of the intake pipe. ing.
  • a saddle-ride type vehicle such as a motorcycle in which an air cleaner is attached to a main frame extending downward from the head pipe
  • an air cleaner is attached to a main frame extending downward from the head pipe
  • an excessive load acts on the air cleaner from the front due to some event, for example, an excessive amount is applied to the front wheel.
  • the front wheels and the front fender press the front surface of the air cleaner, there is a concern that the air cleaner may move rearward from the normal mounting state on the vehicle body frame and interfere with the fuel injection valve. The response to such concerns is not specifically disclosed.
  • the present invention has been made in view of such circumstances, and is configured such that a fuel injection valve is attached to an intake passage forming member, and even if the air cleaner receives an excessive load from the front due to some event, the fuel injection valve and
  • An object of the present invention is to provide an internal combustion engine for a saddle-ride type vehicle that can avoid interference of an air cleaner.
  • the present invention provides a vehicle body frame having a head pipe that supports a steering handle in a steerable manner, and a main frame that tilts rearwardly downward from the head pipe and extends rearward.
  • An engine main body disposed below the frame is mounted with a cylinder axis inclined forward, a cylinder head constituting a part of the engine main body, an air cleaner disposed between the main frames, an intake port of the cylinder head,
  • a saddle-ride type vehicle internal combustion engine in which a fuel injection valve is attached to the front side of an intake passage forming member that forms a part of an intake passage that connects the two, an attached portion provided in an upper portion of the air cleaner extends in the vehicle width direction.
  • the fuel injection valve is fastened to the main frame by a fastening member having Outward from the virtual rotation locus described about the axis of the fastening member by a lowermost disposed in part, the first, characterized in that said fuel injection valve is arranged.
  • the lower edge portion of the air cleaner is formed to be inclined so as to become a lower position toward one side in the vehicle width direction when viewed from the front of the vehicle.
  • the second feature is that the upper end portion of the air cleaner is arranged below the air cleaner so that the upper end portion is flush with the lower end portion of the air cleaner in a side view of the vehicle.
  • a quick connector is provided at an end of the fuel hose that supplies fuel to the fuel injection valve on the fuel injection valve side, and the intake passage forming member includes
  • a third feature is that a detent rib that engages with the quick connector connected to the combustion injection valve is integrally provided.
  • the present invention is characterized in that, in addition to the configuration of the third feature, the fuel hose is disposed inside the outermost end in the vehicle width direction of the engine body.
  • the present invention further includes the intake passage forming member extending from the intake port while being curved obliquely forward and upward from the side of the vehicle, and rotated to the cylinder head by the cylinder head.
  • An intake valve and an exhaust valve that open and close according to the rotation of a freely supported camshaft, and an intake valve side maintenance opening for maintaining the end of the intake valve on the camshaft side;
  • An exhaust valve side maintenance opening for maintaining an end of the exhaust valve on the camshaft side, and closing the intake valve side maintenance opening and the exhaust valve side maintenance opening
  • the exhaust valve side maintenance cover is attached to the cylinder head so that it can be opened and closed independently of each other. It is a feature of the.
  • an intake pipe coupling surface that faces the outer end opening of the intake port so as to couple the downstream end of the intake passage forming member is a side view of the vehicle.
  • the cylinder head is formed so as to face obliquely upward at the front.
  • a cover coupling surface for coupling the intake valve side maintenance cover is formed on the cylinder head in the same plane as the intake pipe coupling surface. Is the seventh feature.
  • the present invention further includes an upstream end connected to the air cleaner via a connecting tube, and the intake passage forming member communicating with the intake port of the cylinder head.
  • a throttle body having a downstream end connected to the cylinder head, wherein the intake passage forming member extends from the intake port while curving obliquely upward and forward from the vehicle side view, and the lower portion of the air cleaner is viewed from the vehicle front view
  • the throttle body is disposed so as to overlap at least a part of the throttle body.
  • the air cleaner forms a purification chamber between a bowl-like cleaner case opened forward and the cleaner case while holding a cleaner element.
  • a projecting portion that forms a bulging chamber that communicates with the purifying chamber is projected integrally with the lower portion of the partition plate so as to project to the unpurified chamber side.
  • the present invention is such that a portion of the connecting tube accommodated in the purification chamber is curved so as to form a U-shape opened rearward below the main frame. It is the tenth feature that it is formed.
  • the mounted portion at the upper portion of the air cleaner is fastened to the main frame by the fastening member having an axis extending in the vehicle width direction, and the fuel injection valve in the vehicle width direction of the lower edge portion of the air cleaner. Since the fuel injection valve is disposed outside the virtual rotation locus drawn at the bottom of the portion where the shaft is disposed around the axis of the fastening member, the fastening member is caused by an excessive load from the front due to some event by the air cleaner. Interference between the air cleaner and the fuel injection valve can be avoided even if it is rotated rearward with fulcrum as a fulcrum.
  • the lower edge portion of the air cleaner is inclined so as to become a lower position toward the one side in the vehicle width direction when viewed from the front of the vehicle. Since the capacity of the lower part of the air cleaner can be increased as much as possible in the part that does not become necessary, and the fuel injection valve with the lower end and the upper end of the air cleaner having the same height as viewed from the side of the vehicle is disposed below the air cleaner, the air cleaner By receiving an excessive load from the front, it is possible to avoid interference between the air cleaner and the fuel injection valve even if the fastening member is rotated backward with the fastening member as a fulcrum.
  • the quick connector provided at the end of the fuel hose on the fuel injection valve side is provided with a non-rotating rib integrally formed with the intake passage forming member. Since it engages in the connection state to a valve, a fuel hose can be hold
  • the fuel hose is located inside the outermost end in the vehicle width direction of the engine body, it is possible to suppress external contact and interference with the fuel hose.
  • the intake passage forming member ie, the intake pipe
  • the intake passage forming member extends from the intake port while being bent obliquely upward and forward in a side view of the vehicle. Is done.
  • the distance between the fuel injection valve and the intake port is shortened, so that the intake pipe adhering to the fuel is effectively suppressed.
  • the cylinder head is configured as a so-called integrated head so as to have the intake valve side maintenance opening and the exhaust valve side maintenance opening, the position of the air cleaner is lowered and the space between the air cleaner and the cylinder head is reduced.
  • the arrangement of the throttle body and the intake pipe and the attachment of the fuel injection valve to the intake pipe are compatible, and the maintainability of the valve operating system parts can be ensured.
  • the intake pipe coupling surface that faces the outer end opening of the intake port faces the front upper side in a side view of the vehicle, so that the intake pipe and the intake port are connected while suppressing bending.
  • fuel adhering to the intake pipe can be suppressed and the premixed air can be smoothly guided to the combustion chamber.
  • the cover coupling surface for coupling the intake valve side maintenance cover is included in the same plane as the intake pipe coupling surface, the intake pipe coupling surface and the cover coupling surface are They can be formed at the same time by one processing, and the number of processing steps can be reduced.
  • the intake passage forming member (that is, the intake pipe) is extended from the intake port while being bent obliquely forward and upward in a side view of the vehicle, so that the vertical length is suppressed while extending the intake pipe length.
  • the distance between the fuel injection valve and the intake port is shortened, so that the intake pipe adhering to the fuel is effectively suppressed.
  • the lower part of the air cleaner overlaps at least a part of the throttle body when viewed from the front of the vehicle, both the arrangement of the throttle body and the intake pipe and the attachment of the fuel injection valve to the intake pipe are compatible, and the capacity of the air cleaner is ensured. Can do.
  • the volume of the purification chamber can be made as large as possible.
  • the length of the intake pipe can be extended to increase the low speed torque.
  • FIG. 1 is a left side view of the motorcycle.
  • FIG. 2 is an enlarged view of a main part of FIG.
  • FIG. 3 is a longitudinal side view of the intake system of the internal combustion engine.
  • 4 is a cross-sectional view taken along line 4-4 of FIG.
  • FIG. 5 is a view of the air cleaner with the cleaner cover omitted as viewed from the direction of arrows 5-5 in FIG.
  • FIG. 6 is a perspective view of the intake system of the internal combustion engine as viewed obliquely from the front left side with the air cleaner omitted.
  • 7 is a view taken in the direction of arrow 7 in FIG.
  • FIG. 8 is a plan view showing relative positions of the vehicle body frame, the engine body, and the fuel hose.
  • FIG. 9 is a side view corresponding to FIG. 2 of the first comparative example.
  • FIG. 10 is a side view corresponding to FIG. 2 of the second comparative example.
  • FIG. 11 is a cross-sectional view corresponding
  • Portion 56 Throttle body 57... Intake pipe 57 b that is an intake passage forming member... Anti-rotation rib 58... Intake pipe coupling surface 60.
  • Fuel injector 65 ... Cleaner case 65a ... Mounted portion 66 ... Partition plate 66a ... Protruding portion 67 ... Cleaner cover 68 ... Cleaner element 69 ... Purification chamber 70
  • Unpurified chamber 72 ... bulging chamber 74
  • bolt 82 as a fastening member ... fuel hose 83 ... quick connector C ... cylinder axis CT1, CT2 ... virtual rotation locus F ... ⁇ Body frame PL ... Plane
  • front and rear, top and bottom, and left and right refer to directions viewed from the occupant who rides the motorcycle.
  • a body frame F of a motorcycle that is a saddle-ride type vehicle includes a head pipe 13 that pivotally supports a front fork 11 and a steering handle 12 that pivotally support a front wheel WF, and a head pipe 13 that A single main frame 14 inclined rearward and extending rearward, a pair of left and right pivot plates 15 connected to a rear end portion of the main frame 14 and extending downward, and a rear end of the main frame 14 And a pair of left and right seat rails 16 extending rearward from the portion, and configured as a backbone type.
  • the rear wheel WR is rotatably supported at the rear end portion of the swing arm 18, and the front end portion of the swing arm 18 is supported by the pivot plate 15 via a support shaft 19 so as to be swingable.
  • a rear cushion unit 20 is provided between the rear portion of the rail 16 and the rear portion of the swing arm 18.
  • an engine main body 21 of an internal combustion engine E that is a single cylinder has a crankcase 23, a cylinder body 24, and a cylinder head 25 that support a crankshaft 22 that has an axis lined in the width direction of the motorcycle.
  • the engine body 21 is mounted on the vehicle body frame F so that the cylinder axis C is inclined forward until it becomes substantially horizontal and is disposed below the main frame 14.
  • the crankcase 23 accommodates a transmission rod (not shown) that transmits the rotational power of the crankshaft 22 while changing the rotational speed, and one end of the output shaft 26 of the transmission is connected to the crankcase. It protrudes outward from the crankcase 23 behind the shaft 22.
  • an endless chain 29 is wound around a driving sprocket 27 fixed to the protruding end of the output shaft 26 and a driven sprocket 28 provided on the rear wheel WR.
  • a front portion of the vehicle body frame F and a part of the internal combustion engine E are covered with a front cover 30, and a rear portion of the vehicle body frame F is covered with a body cover 31, and a riding seat 32 is provided on the body cover 31 so that it can be opened and closed.
  • a fuel tank (not shown) covered from above with the riding seat 32 is accommodated in the front portion of the body cover 31.
  • a piston 34 connected to the crankshaft 22 is slidably fitted into a cylinder bore 33 of the cylinder body 24, and a combustion chamber 35 that faces the top of the piston 34. Is formed between the cylinder body 24 and the cylinder head 25.
  • the cylinder head 25 is provided with an intake port 36 for intake into the combustion chamber 35 so as to open to the upper side wall of the cylinder head 25, and an exhaust port 37 for exhausting from the combustion chamber 35.
  • the cylinder head 25 is provided so as to open on the lower side wall.
  • the cylinder head 25 is closed with an intake valve 38 for controlling intake air from the intake port 36 to the combustion chamber 35 and an exhaust valve 39 for controlling exhaust gas from the combustion chamber 35 to the exhaust port 37.
  • a valve operating mechanism 40 that opens and closes the intake valve 38 and the exhaust valve 39 is accommodated in the cylinder head 25 while being urged by a spring in the direction.
  • the valve mechanism 40 can rotate around an axis parallel to the crankshaft 22 and is rotatably supported by the cylinder head 25, and between the intake valve 38 and the camshaft 41.
  • An intake valve rocker arm 42 provided, and an exhaust valve rocker arm 43 provided between the exhaust valve 39 and the camshaft 41 are provided.
  • Rotational power from the crankshaft 22 is transmitted to the camshaft 41 via a timing transmission mechanism (not shown).
  • the cylinder head 25 supports an intake valve side rocker shaft 44 and an exhaust valve side rocker shaft 45 that have axes parallel to the camshaft 41, and are swingably supported by the intake valve side rocker shaft 44.
  • the intake valve rocker arm 42 swings according to the rotation of the camshaft 41 to open and close the intake valve 38 and is supported by the exhaust valve side rocker shaft 45 so as to be swingable.
  • 43 swings according to the rotation of the camshaft 41 to open and close the exhaust valve 39.
  • the cylinder head 25 includes an intake valve side maintenance opening 46 for maintaining the end 38a of the intake valve 38 on the camshaft 41 side, and an end 39a of the exhaust valve 39 on the camshaft 41 side. And an exhaust valve side maintenance opening 47 for closing the intake valve side maintenance opening 47, and an exhaust valve side maintenance cover for closing the exhaust valve side maintenance opening 47. 49 is attached to the cylinder head 25 with a plurality of bolts 50 and 51 so that the cylinder 49 can be opened and closed independently.
  • An upstream end portion of an exhaust pipe 52 connected to the exhaust port 37 is fastened to a lower side wall of the cylinder head 25, and the exhaust pipe 52 passes rearward of the engine body 21 as shown in FIG. And is connected to an exhaust muffler (not shown) disposed on the right side of the rear wheel WR.
  • an air cleaner 54 is disposed between the cylinder head 25 and the main frame 14, and the air cleaner 54 is connected to the upstream end of the throttle body 56 via a connecting tube 55, and the downstream end of the throttle body 56.
  • the portion is connected to the upper side wall of the cylinder head 25 via an intake pipe 57 connected to the intake port 36 of the cylinder head 25.
  • the intake pipe 57 extends from the intake port 36 while being bent obliquely forward and upward in a side view of the vehicle, and the intake pipe 57 is integrated with the downstream end thereof.
  • a flange portion 57a is provided with a plurality of bolts 59 to an intake pipe coupling surface 58 formed on the cylinder head 25 so as to face the outer end opening of the intake port 36.
  • the intake pipe coupling surface 58 is formed in the cylinder head 25 so as to face obliquely upward in the side view of the vehicle, and the intake valve side maintenance cover 48. Is formed on the cylinder head 25 on the same plane PL as the intake pipe coupling surface 58.
  • the connecting tube 55, the throttle body 56, and the intake pipe 57 form an intake passage 61 that connects the intake port 36 and the air cleaner 54, and adjusts the amount of air flowing through the intake passage 61.
  • the throttle valve 62 is provided on the throttle body 56.
  • the air cleaner 54 forms a purification chamber 69 between the bowl-shaped cleaner case 65 opened forward and the cleaner case 65 while holding the cleaner element 68.
  • a partition plate 66 that closes the opening end of the cleaner case 65 and a plurality of screw members 71 (see FIG. 5) from the front to the cleaner case 65 so as to sandwich the outer peripheral portion of the partition plate 66 with the cleaner case 65. 2) and a cleaner cover 67 that forms an unpurified chamber 70 between the partition plate 66 and the cleaner cover 67.
  • a protruding portion 66a that forms a bulging chamber 72 communicating with the inside of the purification chamber 69 is integrally projected so as to protrude toward the unpurified chamber 70 side.
  • the upper portion of the air cleaner 54 is fastened to the main frame 14 with a fastening member having an axis extending in the vehicle width direction.
  • the air cleaner 54 is provided on the upper portion of the cleaner case 65 in the air cleaner 54.
  • a pair of left and right attached portions 65a, 65a are bolts 74, 74 as a pair of left and right fastening members and nuts 75, 75 screwed to the bolts 74, 74 to a stay 73 fixed to the main frame 14. And concluded.
  • Suction ports 76, 76 are provided on the left and right sides of the upper portion of the partition plate 66, and a pair of left and right suction pipes 77, 77 individually connected to the suction ports 76, 76 penetrate the cleaner case 65. And it is extended backward. Accordingly, outside air is sucked into the unpurified chamber 70 of the air cleaner 54 from the rear side of the air cleaner 54 through the suction pipes 77 and 77.
  • the connecting tube 55 air-tightly penetrates the cleaner case 65 so that the downstream end 55a protrudes downward from the cleaner case 65 in the air cleaner 54, and the downstream end 55a of the connecting tube 55 is A band 78 is connected to the upstream end of the throttle body 56. That is, most of the connecting tube 55 is accommodated in the purification chamber 69 of the air cleaner 54, and the portion 55 b of the connecting tube 55 accommodated in the purification chamber 69 is the main frame 14. It is formed to be curved so as to form a U-shape that is opened rearwardly below.
  • the intake pipe 57 which is an intake passage forming member that forms a part of the intake passage 61 that connects the air cleaner 54 and the intake port 36 of the cylinder head 25.
  • the fuel injection valve 63 is attached.
  • the lowermost part 54aa of the lower edge part 54a of the air cleaner 54 where the fuel injection valve 63 is arranged in the vehicle width direction is used to fasten the upper part of the air cleaner 54 to the stay 73 of the main frame 14.
  • the fuel injection valve 63 is disposed outside the virtual rotation locus CT1 (see FIG. 3) drawn around the axis of the axis.
  • the lower edge portion 54a of the air cleaner 54 is formed so as to be inclined so as to become a lower position toward one side in the vehicle width direction (to the left in this embodiment) when viewed from the front of the vehicle.
  • the fuel injection valve 63 is disposed below the air cleaner 54 with its upper end being flush with the lower end of the air cleaner 54 as viewed from the side of the vehicle.
  • a recess 79 is formed in the lower portion of the air cleaner 54 on the rear side of the cleaner case 65, and the throttle body 56 and a part of the intake pipe 57 are disposed in the recess 79, so that the fuel
  • the injection valve 63 is arranged so that its upper end is flush with the lower end of the air cleaner 54 as viewed from the side of the vehicle.
  • a part of the fuel injection valve 63 is inserted into a valve mounting hole 80 provided in the intake pipe 57, and the fuel injection valve 63 includes the intake pipe 57 and a cap 81 fastened to the intake pipe 57. Is retained.
  • a quick connector 83 that is fitted and connected to the connection pipe 81a of the cap 81 is provided.
  • the intake pipe 57 is integrally provided with a detent rib 57 b that engages with the quick connector 83 connected to the fuel injection valve 63.
  • the fuel hose 82 is disposed inside the outermost end in the vehicle width direction of the engine body 21. That is, in this embodiment, the inner side in the vehicle width direction is more inward than the virtual vertical plane VL1 that forms a part of the engine body 21 and passes through the outermost surface of the cover 84 that is coupled to the left side surface of the crankcase 23.
  • the routing path of the fuel hose 82 is set so that there is a virtual vertical plane VL2 passing through the outer end of the fuel hose 82 in the vehicle width direction.
  • An air cleaner 54 disposed between the cylinder head 25 and the main frame 14 of the vehicle body frame F is connected to the upstream end portion of the throttle body 56 via the connecting tube 55.
  • the downstream end of the throttle body 56 is connected to the cylinder head 25 via an intake pipe 57 communicating with the intake port 36 of the cylinder head 25, and the intake pipe 57 is viewed from the side of the vehicle when viewed from the side of the vehicle. Therefore, it is possible to suppress the vertical length of the intake pipe 57 while extending the intake pipe length.
  • the cylinder head 25 is provided with an intake valve 38 and an exhaust valve 39 that open and close according to the rotation of a camshaft 41 that is rotatably supported by the cylinder head 25, and the cam of the intake valve 38.
  • An intake valve side maintenance opening 46 for maintaining the end portion 38a on the shaft 41 side and an exhaust valve side maintenance opening portion 47 for maintaining the end portion 39a on the camshaft 41 side of the exhaust valve 39 are provided.
  • An intake valve side maintenance cover 48 that closes the intake valve side maintenance opening 46 and an exhaust valve side maintenance cover 49 that closes the exhaust valve side maintenance opening 47 are attached to the cylinder head 25 so that they can be opened and closed independently of each other.
  • the cylinder head 25 a so-called integrated head Even if the arrangement position of the air cleaner 54 is lowered due to a change in the downward angle of the main frame 14, etc., the arrangement of the throttle body 56 and the intake pipe 57 and the attachment of the fuel injection valve 63 to the intake pipe 57 are compatible. In addition, maintainability of valve operating parts such as the camshaft 41, the intake valve rocker arm 42 and the exhaust valve rocker arm 43 can be ensured.
  • the first comparative example is compared with the first comparative example in which a shallow dish-shaped head cover 86A is coupled to the cylinder head 25A to form a part of the engine body 21A. Then, the coupling surface 87A of the cylinder head 25A and the head cover 86A is close to the lower portion of the air cleaner 54, and it becomes difficult to ensure a sufficient clearance 88 between the air cleaner 54 and the engine body 21A. And the attachment of the fuel injection valve 63 to the intake pipe 57 are difficult to achieve, and the maintainability of the valve operating system parts also deteriorates. On the other hand, according to the present invention, as shown in FIGS.
  • a sufficient clearance 89 can be secured between the air cleaner 54 and the engine body 21.
  • this second comparative example in comparison with the second comparative example in which a deep saddle-shaped head cover 86B is coupled to the cylinder head 25B to form a part of the engine body 21BA, this second comparative example The coupling surface 87B of the cylinder head 25B and the head cover 86B is close to the intake port 36 of the cylinder head 25B, and the degree of freedom in arrangement of the intake port 36 is reduced.
  • the lower portion of the air cleaner 54 is arranged so as to overlap at least a part of the throttle body 56 when viewed from the front of the vehicle, the arrangement of the throttle body 56 and the intake pipe 57 and the attachment of the fuel injection valve 63 to the intake pipe 57 are arranged. And the capacity of the air cleaner 54 can be secured.
  • the cylinder head 25 has an intake pipe coupling surface 58 that faces the outer end opening of the intake port 36 so as to connect the downstream end of the intake pipe 57 so as to face obliquely upward in the side view of the vehicle. Therefore, it is possible to connect the intake pipe 57 and the intake port 36 while suppressing the bending, and it is possible to guide the premixed air smoothly to the combustion chamber 35 while suppressing the adhesion of fuel to the intake pipe 57.
  • the cover coupling surface 60 for coupling the intake valve side maintenance cover 48 is formed on the cylinder head 25 on the same plane PL as the intake pipe coupling surface 58, the intake pipe coupling surface 58 and the cover coupling are formed.
  • the surface 60 can be formed simultaneously by one processing, and the number of processing steps can be reduced.
  • the air cleaner 54 is a partition that closes the opening end of the cleaner case 65 by forming a purification chamber 69 between the bowl-shaped cleaner case 65 opened forward and the cleaner case 65 while holding the cleaner element 68.
  • An unpurified chamber 70 is formed between the plate 66 and the partition plate 66 while the outer peripheral portion of the partition plate 66 is sandwiched between the cleaner case 65 and the cleaner case 65 from the front.
  • a protrusion 66a that forms a bulging chamber 72 communicating with the inside of the purification chamber 69 so as to protrude toward the unpurified chamber 70. Therefore, the volume of the purification chamber 69 can be increased as much as possible.
  • a portion 55b accommodated in the purification chamber 69 of the connecting tube 55 is formed to be curved in a U-shape opened rearward below the main frame 14, so that the length of the intake pipe is extended. Can increase the low-speed torque.
  • a mounted portion 65a provided on the upper portion of the air cleaner 54 is fastened to a stay 73 of the main frame 14 with a bolt 74 having an axis extending in the vehicle width direction, and fuel is generated in the vehicle width direction of the lower edge portion 54a of the air cleaner 54. Since the fuel injection valve 63 is disposed at the lowermost part 54aa of the portion where the injection valve 63 is disposed outside the virtual rotation locus CT1 drawn around the axis of the bolt 74, the air cleaner 54 is caused by some event. By receiving an excessive load from the front, interference between the air cleaner 54 and the fuel injection valve 63 can be avoided even if the bolt 74 is rotated backward with the bolt 74 as a fulcrum.
  • the lower edge portion 54a of the air cleaner 54 is formed so as to incline toward the lower position as it goes in the vehicle width direction (leftward in this embodiment) when viewed from the front of the vehicle.
  • the capacity of the lower portion of the air cleaner 54 can be increased as much as possible at a portion that does not overlap the valve 63, and the fuel injection valve 63 has its upper end portion flush with the lower end portion of the air cleaner 54 as viewed from the side of the vehicle.
  • the air cleaner 54 receives an excessive load from the front due to some event, the air cleaner 54 and the fuel injection valve 63 interfere with each other even if the bolt 74 is rotated backward with the bolt 74 as a fulcrum. It can be avoided.
  • a quick connector 83 is provided at the end of the fuel hose 82 for supplying fuel to the fuel injection valve 63 on the fuel injection valve 63 side, and engages with the quick connector 83 connected to the fuel injection valve 63. Since the stop rib 57b is provided integrally with the intake pipe 57, the fuel hose 82 can be held at a predetermined position without increasing the number of parts.
  • the fuel hose 82 is disposed inside the outermost end in the vehicle width direction of the engine body 21, contact and interference from the outside to the fuel hose 82 can be suppressed.
  • an air cleaner 54 ′ whose vertical length is shorter than that of the air cleaner 54 shown in the above embodiment is disposed between the cylinder head 25 and the main frame 14. You may make it do.
  • the air cleaner 54 ′ is connected to the upstream end portion of the throttle body 56 via a connecting tube 55, and the downstream end portion of the throttle body 56 is connected to the cylinder via an intake pipe 57 connected to the intake port 36 of the cylinder head 25.
  • a part of the fuel injection valve 63 is inserted into a valve mounting hole 80 provided on the front side of the intake pipe 57, and the fuel injection valve 63 includes the intake pipe 57 and a cap 81 fastened to the intake pipe 57. Is held, the fuel injection valve 63 is attached to the front side of the intake pipe 57.
  • a quick connector 83 provided at an end portion of the fuel hose 82 on the fuel injection valve 63 side is fitted and connected to a connection pipe 81 a included in the cap 81.
  • the air cleaner 54 ′ forms a purification chamber 69 ′ between the bowl-shaped cleaner case 65 ′ opening forward and the cleaner case 65 ′ while holding the cleaner element 68, thereby opening the cleaner case 65 ′.
  • a partition plate 66 ' that closes the end, and an outer peripheral portion of the partition plate 66' is fastened to the cleaner case 65 'from the front so as to be sandwiched between the cleaner case 65' and the partition plate 66 '.
  • a cleaner cover 67 ′ forming an unpurified chamber 70 ′.
  • a pair of left and right attachment portions 65 a ′ provided on the upper portion of the cleaner case 65 ′ in the air cleaner 54 ′ are screwed to the stay 73 fixed to the main frame 14 and the pair of left and right bolts 74. It is fastened with a nut 75 to be joined.
  • the lowermost part 54aa 'of the lower edge part 54a' of the air cleaner 54 'where the fuel injection valve 63 is arranged in the vehicle width direction fastens the upper part of the air cleaner 54 to the stay 73 of the main frame 14.
  • the fuel injection valve 63 is disposed outside the virtual rotation locus CT2 drawn around the axis of the bolt 74, but also the cap 81, quick connector 83 and fuel hose 82 related to the fuel injection valve 63.
  • the fuel system parts such as are also arranged outside the virtual rotation locus CT2.
  • the lower edge portion 54a 'of the air cleaner 54' is inclined so as to become a lower position in the vehicle front view as it goes to one side in the vehicle width direction (to the left in this embodiment).
  • the cap 81, the quick connector 83, and the fuel hose 82 are also formed at lower positions in the vehicle width direction (to the left in this embodiment) corresponding to the lower edge portion 54a '.
  • the air cleaner 54 ' has a drain pipe 90.
  • the drain pipe 90 avoids fuel system parts such as the cap 81, the quick connector 83, and the fuel hose 82 outward in the vehicle width direction.
  • the lower edge portion 54a ' is suspended downward from the lowest position in the vehicle width direction.
  • the air cleaner 54 ′ having the drain pipe 90 does not perform fuel injection.
  • interference with fuel system components such as the cap 81, the quick connector 83, and the fuel hose 82 can be avoided.
  • the intake passage forming member to which the fuel injection valve 63 is attached is the intake pipe 57, but the throttle body 56 may be an intake passage forming member to which the fuel injection valve 63 is attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention porte sur un moteur à combustion interne de véhicule du type à selle dans lequel un filtre à air (54) est disposé entre un cadre principal (14) et une tête de cylindre (25) d'un corps principal de moteur (21), dont un axe de cylindre (C) est incliné vers l'avant, et qui est disposé en dessous du cadre principal (14) qui est incliné vers l'arrière et vers le bas à partir d'un tuyau d'amenée (13), et qui s'étend vers l'arrière; dans lequel une vanne d'injection de carburant (63) est attachée au côté avant d'un élément de formation de passage d'admission d'air (57), qui constitue une partie d'un passage d'admission d'air (61) qui relie le filtre à air et un orifice d'admission d'air (36) de la tête de cylindre, une partie attachée (65a), disposée sur une partie supérieure du filtre à air (54) étant fixée au cadre principal (14) à l'aide d'un élément de fixation (74) dont un axe s'étend dans la direction de la largeur du véhicule, la vanne d'injection de carburant (63) étant disposée plus loin vers l'extérieur qu'une trajectoire de rotation virtuelle (CT1) qui est tracée autour de l'axe de l'élément de fixation (74) par une partie la plus basse (54aa), qui est la partie de la partie de bord inférieur (54a) du filtre à air (54) au niveau de laquelle la vanne d'injection de carburant (63) est établie dans le sens de la largeur du véhicule.
PCT/JP2015/073781 2014-09-30 2015-08-25 Moteur à combustion interne de véhicule du type à selle WO2016052005A1 (fr)

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CN201580053154.XA CN106794883B (zh) 2014-09-30 2015-08-25 跨骑式车辆用内燃机

Applications Claiming Priority (4)

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JP2014201433A JP6347445B2 (ja) 2014-09-30 2014-09-30 鞍乗り型車両用内燃機関
JP2014-201434 2014-09-30
JP2014201434A JP6379387B2 (ja) 2014-09-30 2014-09-30 鞍乗り型車両用内燃機関
JP2014-201433 2014-09-30

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6536668B1 (ja) * 2017-12-28 2019-07-03 マツダ株式会社 エンジン

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000249028A (ja) * 1999-03-02 2000-09-12 Honda Motor Co Ltd バックボーン型自動二輪車における燃料噴射装置
JP2004176562A (ja) * 2002-11-25 2004-06-24 Honda Motor Co Ltd エンジンの吸気装置
JP2005042710A (ja) * 2003-07-10 2005-02-17 Yamaha Motor Co Ltd エンジン
JP2006057566A (ja) * 2004-08-23 2006-03-02 Yamaha Motor Co Ltd 車両
JP2007321608A (ja) * 2006-05-31 2007-12-13 Honda Motor Co Ltd 燃料配管構造
JP2008248718A (ja) * 2007-03-29 2008-10-16 Honda Motor Co Ltd 車両用エンジンの吸気装置
WO2014050489A1 (fr) * 2012-09-28 2014-04-03 本田技研工業株式会社 Véhicule à selle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008286092A (ja) * 2007-05-17 2008-11-27 Yamaha Motor Co Ltd 自動二輪車

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000249028A (ja) * 1999-03-02 2000-09-12 Honda Motor Co Ltd バックボーン型自動二輪車における燃料噴射装置
JP2004176562A (ja) * 2002-11-25 2004-06-24 Honda Motor Co Ltd エンジンの吸気装置
JP2005042710A (ja) * 2003-07-10 2005-02-17 Yamaha Motor Co Ltd エンジン
JP2006057566A (ja) * 2004-08-23 2006-03-02 Yamaha Motor Co Ltd 車両
JP2007321608A (ja) * 2006-05-31 2007-12-13 Honda Motor Co Ltd 燃料配管構造
JP2008248718A (ja) * 2007-03-29 2008-10-16 Honda Motor Co Ltd 車両用エンジンの吸気装置
WO2014050489A1 (fr) * 2012-09-28 2014-04-03 本田技研工業株式会社 Véhicule à selle

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CN106794883A (zh) 2017-05-31

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