WO2009119210A1 - 車両のパワーユニット - Google Patents

車両のパワーユニット Download PDF

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Publication number
WO2009119210A1
WO2009119210A1 PCT/JP2009/052987 JP2009052987W WO2009119210A1 WO 2009119210 A1 WO2009119210 A1 WO 2009119210A1 JP 2009052987 W JP2009052987 W JP 2009052987W WO 2009119210 A1 WO2009119210 A1 WO 2009119210A1
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WO
WIPO (PCT)
Prior art keywords
crankshaft
crankcase
oil pump
power unit
cam chain
Prior art date
Application number
PCT/JP2009/052987
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
親司 滝口
克哉 阿部
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41113418&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009119210(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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 CN200980106534XA priority Critical patent/CN101960104B/zh
Priority to BRPI0909253-6A priority patent/BRPI0909253B1/pt
Publication of WO2009119210A1 publication Critical patent/WO2009119210A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F01M2001/066—Connecting rod with passageways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/083—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/086—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins

Definitions

  • the present invention relates to a power unit of a vehicle equipped with an oil pump for supplying lubricating oil, and more particularly to an arrangement of the oil pump and improvement of a driving means of the oil pump.
  • a power unit having a belt type continuously variable transmission on one end side of the crankshaft and a cam chain for driving a valve operating device and a generator on the other end side of the crankshaft is fixed to the vehicle body.
  • the lubricating oil of the power unit has been conventionally used.
  • the oil pump for supply is arranged on the side where the cam chain and the generator are provided, a gear train for driving the oil pump is provided between the crankshaft and the oil pump shaft, and the rotation of the crankshaft is transmitted.
  • the oil pump was driven (for example, refer to Patent Document 1).
  • the oil pump and the gear train occupy a large space, there is a problem that the generator protrudes outward in the vehicle width direction and the width of the power unit increases.
  • the present invention proposes an oil pump driving means in which the oil pump for supplying lubricating oil of the power unit is disposed on the side of the crankshaft where the belt-type continuously variable transmission is provided, and has a small occupied space. It is an object to prevent the lateral width of the power unit from expanding so as not to protrude outward in the vehicle width direction.
  • the present invention provides a crankshaft oriented in the vehicle body width direction and a camshaft of a valve mechanism, a cam chain disposed on the side of the cylinder and transmitting the power of the crankshaft to the camshaft,
  • a belt-type non-equipment having a generator arranged outside the cam chain in the width direction and rotated by a crankshaft, a drive pulley shaft driven by the crankshaft in parallel with the crankshaft, and a parallel driven pulley shaft.
  • a vehicular power unit in which the belt-type continuously variable transmission is disposed on one end side of the crankshaft, and the generator is disposed on the other end side of the crankshaft.
  • An inner transmission case that covers the belt-type continuously variable transmission from the inside in the vehicle width direction, and the belt in the vehicle width direction.
  • An outer transmission case that covers the continuously variable transmission from the outside and forms a transmission case that accommodates the belt type continuously variable transmission together with the inner transmission case, and a side opposite to the cam chain in the vehicle body width direction.
  • a vehicle power unit comprising a lubricating oil supply oil pump disposed on an inner transmission case side of the crankcase is provided.
  • the oil pump includes a driving force transmission means configured by a sprocket that meshes with the cam chain and an oil pump drive shaft that is coaxially connected to the sprocket and passes through the crankcase.
  • the crankcase is divided by a mating surface orthogonal to the crankshaft
  • the oil pump drive shaft includes a sprocket meshing with a cam chain at an end
  • the bearing of the oil pump drive shaft The portions are provided on one and the other of the divided crankcases, respectively.
  • the oil pump drive shaft reaches a room formed between the crankcase and an inner transmission case attached to the crankcase. It is fixed to the wall of the crankcase.
  • the oil pump is arranged on the side opposite to the cam chain and the generator with respect to the cylinder axis of the internal combustion engine, the extension of the generator to the outside can be reduced.
  • the oil pump by configuring the oil pump to have a driving force transmission means constituted by a sprocket meshing with the cam chain and an oil pump drive shaft that is coaxially connected to the sprocket and penetrates the crankcase, Since there is no need to provide a dedicated gear train connected to the crankshaft for driving the oil pump, it prevents the power unit from protruding to the generator side, allows the oil pump to move closer to the cylinder axis, and the oil supply passage to the cylinder head Can be shortened.
  • a driving force transmission means constituted by a sprocket meshing with the cam chain and an oil pump drive shaft that is coaxially connected to the sprocket and penetrates the crankcase
  • the crankcase is divided by a mating surface orthogonal to the crankshaft, the oil pump drive shaft is provided with the sprocket meshing with the cam chain at one end thereof, and the bearing portion of the oil pump drive shaft is divided into cranks. Since the oil pump drive shaft that supports the sprocket meshing with the cam chain is supported on the crankcase in a cantilevered manner without having a bearing outside the sprocket by being provided on one side and the other side of the case. The overhang of the power unit in the vehicle width direction can be suppressed. And the bearing part of the said oil pump drive shaft is each provided in one and the other of the divided crankcase, and since the oil pump drive shaft is supported by a long span, it is stable.
  • FIG. 1 is a side view of a motorcycle including a vehicle power unit according to an embodiment of the present invention. It is the side view which looked at the power transmission device of the said power unit from the right side.
  • FIG. 3 is a developed sectional view taken along the line III-III in FIG. 2. It is a left view of the cylinder part and left crankcase of the said power unit.
  • FIG. 5 is a cross-sectional view of the power unit taken along the line VV in FIG. 4. It is a figure which shows the cross section of the right side of a right crankcase, and the one side part of a cylinder part. It is a right view of a left crankcase.
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG.
  • FIG. 4 is an enlarged view around a crankshaft shown in FIG. 3.
  • FIG. 4 is an enlarged view of the periphery of a belt type continuously variable transmission driven pulley shaft and a reduction gear mechanism intermediate shaft shown in FIG. 3.
  • FIG. 1 is a side view of a motorcycle 1 including a power unit 20 according to an embodiment of the present invention.
  • the vehicle body frame 2 includes a head pipe 3 at the front of the vehicle body, a single main frame 4 that extends obliquely downward from the head pipe 3 and a rear portion of the main frame 4.
  • a pair of left and right pivot brackets 5 and 5 that are fixedly extended downward and the rear part of the main frame 4 are extended obliquely upward from the front of the fixed position of the pivot brackets 5 and 5 to the rear and bent in the middle.
  • a riding seat 8 is provided above the pair of left and right seat rails 6, 6 of the body frame 2, and a lower portion is a storage portion 9.
  • a handle 10 pivotally supported by the head pipe 3 is provided above the front of the vehicle body.
  • a front fork 11 extends below the handle 10 and a front wheel 12 is pivotally supported at the lower end thereof.
  • a rear fork 14 is pivotally supported on the pivot brackets 5 and 5 by a pivot shaft 13 so that the front end thereof is swingable, and extends rearward.
  • a rear wheel 15 is pivotally supported on a rear end portion of the rear fork 14.
  • Rear cushions 16 and 16 are interposed between the rear portion of the rear fork 14 and the seat rails 6 and 6.
  • the power unit 20 is suspended below the main frame 4 and in front of the pivot brackets 5 and 5.
  • the upper part of the power unit 20 is suspended from support brackets 17 and 17 suspended from the center of the main frame 4, and the rear part of the power unit 20 is fixed to the pivot brackets 5 and 5 at two locations.
  • the body frame 2 is covered with a synthetic resin body cover 18 divided into various parts.
  • the power unit 20 includes a front internal combustion engine 21 and a rear power transmission device 22.
  • the internal combustion engine 21 is a single-cylinder four-cycle internal combustion engine, and the cylinder portion 23 projects from the front surface of the crankcase 25 to a substantially horizontal state in a posture that is largely inclined forward.
  • a throttle body 27 and an internal combustion engine intake air cleaner 28 are connected to an intake pipe 26 extending above the internal combustion engine 21.
  • an exhaust pipe 29 extending downward and bent rearward of the internal combustion engine 21 extends rearward and is connected to a muffler 30 on the right side of the rear wheel 15.
  • a power transmission chain 34 is bridged between a power transmission chain drive sprocket 32 fitted to the output shaft 31 of the power unit 20 and a power transmission chain driven sprocket 33 provided integrally with the rear wheel 15, and the rear wheel 15 Is driven.
  • FIG. 2 is a side view of the power transmission device 22 of the power unit 20 as viewed from the right side.
  • a crankshaft 36 of the internal combustion engine 21 is provided at the front portion of the crankcase 25.
  • a right extension of the crankshaft 36 is a drive pulley shaft 39 of the belt type continuously variable transmission 38.
  • the driven pulley shaft 40 of the belt type continuously variable transmission 38 is provided at the rear portion of the crankcase 25.
  • a driving pulley 41 is provided on the driving pulley shaft 39, a driven pulley 42 is provided on the driven pulley shaft 40, and a V-belt 43 is wound around these pulleys to constitute a belt type continuously variable transmission 38.
  • a wet centrifugal clutch 45 having the same diameter as the driven pulley 42 of the driven pulley shaft 40 of the belt type continuously variable transmission 38 is provided.
  • a reduction gear mechanism 46 is provided between the wet centrifugal clutch 45 and the output shaft 31 of the power unit.
  • the reduction gear mechanism 46 includes a centrifugal clutch output gear 47, an intermediate shaft large diameter gear 49, an intermediate shaft small diameter gear 50, and a power unit output shaft large diameter gear 51 provided on the reduction gear mechanism intermediate shaft 48.
  • the kick start mechanism 53 is provided at the bottom of the crankcase 25.
  • the kick start mechanism 53 includes a kick shaft 54 having a kick arm, a kick drive gear 55, a first intermediate shaft 56, a first intermediate shaft small diameter gear 57, a first intermediate shaft large diameter gear 58, a second intermediate shaft 59,
  • the second intermediate shaft small-diameter gear 60, the second intermediate shaft large-diameter gear 61, and a kick start mechanism driven gear 62 provided on the crankshaft 36 are configured.
  • the motor start mechanism 64 is provided on the upper part of the crankcase 25.
  • the motor start mechanism 64 includes a starter motor 65, a drive pinion 66 for the starter motor 65, a motor start mechanism intermediate shaft 67, an intermediate shaft large diameter gear 68 provided on the intermediate shaft 67, an intermediate shaft small diameter gear 69, and a crankshaft.
  • the motor start mechanism driven gear 70 is provided on the left side of 36.
  • An oil pump 71 is provided obliquely in front of the crankshaft 36. In the figure, a cylinder axis L4 is shown.
  • FIG. 3 is a developed sectional view taken along the line III-III in FIG.
  • a cylinder block 73 In front of the crankcase 25, a cylinder block 73, a cylinder head 74, and a cylinder head cover 75 are provided in this order.
  • a piston 76 that reciprocates in the cylinder bore 73 a of the cylinder block 73 is connected to the crankpin 37 of the crankshaft 36 by a connecting rod 77.
  • the internal combustion engine 21 employs a SOHC type valve system, and a valve mechanism 78 is provided in the cylinder head cover 75.
  • the cam chain driven sprocket 80 at the end of the cam shaft 79 of the valve mechanism 78 is a cam. It is driven by a cam chain drive sprocket 82 provided on the crankshaft 36 via a chain 81.
  • a combustion chamber 83 is formed on the end face of the cylinder head 74 on the cylinder block 73 side, and a spark plug 84 is fitted from the right outer side of the cylinder head 74.
  • the shell of the power transmission device 22 of the power unit 20 includes a left crankcase 25L and a right crankcase 25R constituting the crankcase 25, a generator cover 85 provided on the left side of the left crankcase 25L, and a right crankcase 25R.
  • the inner transmission case 86 and the outer transmission case 87 are provided on the right side.
  • crank chamber 88 and a reduction gear chamber 89 communicating with the crank chamber 88 are formed in the internal space of the crankcase 25.
  • the crankshaft 36 is oriented in the vehicle width direction (left-right direction) and is rotatably supported by the left and right crankcases 25L, 25R via bearings 90A, 90B.
  • a part of the gear train of the reduction gear mechanism 46 is accommodated in the reduction gear chamber 89.
  • a generator storage chamber 91 Between the left crankcase 25L and the generator cover 85 is a generator storage chamber 91.
  • a crankshaft 36 extending to the chamber 91 has a cam chain drive sprocket 82, a motor start mechanism driven gear 70, and an alternating current.
  • a rotor 92R of the generator 92 is provided.
  • the AC generator 92 includes a rotor 92R and a stator 92S.
  • the rotor 92R is fixed to an end portion of the crankshaft 36, rotates together with the crankshaft 36, and the stator 92S is fixed inside the generator cover 85.
  • a centrifugal clutch chamber 93 is provided between the right crankcase 25R and the inner transmission case 86.
  • a transmission chamber 94 is provided between the inner transmission case 86 and the outer transmission case 87.
  • the right part of the crankshaft 36 extends into the centrifugal clutch chamber 93, and the tip further extends through the opening seal member of the inner transmission case 86 into the transmission chamber 94.
  • a kick start mechanism driven gear 62 is spline-fitted to a portion of the crankshaft 36 extending to the centrifugal clutch chamber 93.
  • a portion of the crankshaft 36 extending to the transmission chamber 94 is a drive pulley shaft 39 of a belt type continuously variable transmission 38, and a drive pulley 41 of the belt type continuously variable transmission 38 is provided integrally therewith. is there.
  • the driven pulley shaft 40 of the belt type continuously variable transmission 38 is provided behind the drive pulley shaft 39, and is supported by the right crankcase 25R and the inner transmission case 86 via bearings 95A and 95B, respectively.
  • a driven pulley 42 of a belt type continuously variable transmission 38 is provided in a portion of the driven pulley shaft 40 in the transmission chamber 94.
  • a wet centrifugal clutch 45 and a centrifugal clutch output gear 47 are provided in a portion of the driven pulley shaft 40 in the centrifugal clutch chamber 93.
  • the drive pulley 41 of the belt-type continuously variable transmission 38 is composed of a fixed half 41A and a movable half 41B.
  • the movable half 41B rotates with the driving pulley shaft 39, and slides in the axial direction by the action of the weight roller 96 that moves in the centrifugal direction by centrifugal force, and approaches or separates from the fixed half 41A. , 41B, the winding diameter of the V belt 43 is changed.
  • the driven pulley 42 of the belt type continuously variable transmission 38 includes a fixed half body 42A and a movable half body 42B.
  • the movable half body 42B On the right side of the fixed half body 42A, the movable half body 42B is supported by the sleeve 98 through the annular slider 97 so as to be slidable in the axial direction, and is biased to the left by the coil spring 99.
  • the winding diameter of the V-belt 43 sandwiched between the two halves 41A and 41B of the drive pulley 41 increases, the distance between the halves 42A and 42B of the driven pulley 42 resists the biasing force of the coil spring 99.
  • the winding diameter of the V-belt 43 is reduced, and a continuously variable transmission is automatically performed.
  • a wet centrifugal clutch 45 is provided on the left side of the driven pulley shaft 40 in the centrifugal clutch chamber 93.
  • the center portion of the clutch inner 100 is spline-fitted to the driven pulley shaft 40, and a plurality of clutch weights 101 are swingably provided on the outer peripheral end side of the clutch inner 100.
  • a clutch outer 102 integrally connected to the centrifugal clutch output gear 47 is supported on the left end portion of the driven pulley shaft 40 through a needle bearing 103 so as to be rotatable relative to the driven pulley shaft 40.
  • the clutch weight 101 engages with the clutch outer 102, the clutch outer 102 rotates, and the clutch output gear 47 rotates with this.
  • a reduction gear mechanism 46 is provided between the driven pulley shaft 40 of the belt-type continuously variable transmission 38 and the power unit output shaft 31 behind it.
  • the reduction gear mechanism intermediate shaft 48 is supported by the left and right crankcases 25L and 25R via bearings 104A and 104B, and an intermediate shaft large-diameter gear 49 is fitted in a portion of the centrifugal clutch chamber 93 so that the clutch output gear 47 Is engaged.
  • An intermediate shaft small-diameter gear 50 is cut in the reduction gear chamber 89 of the reduction gear mechanism intermediate shaft 48.
  • the power unit output shaft 31 is supported by the left and right crankcases 25L and 25R via bearings 105A and 105B, and a power unit output shaft large-diameter gear 51 is fitted in a portion of the reduction gear chamber 76, so that the reduction gear mechanism intermediate The shaft 48 meshes with the small diameter gear 50.
  • a power transmission chain drive sprocket 32 is fitted on a portion of the power unit output shaft 31 that extends to the left of the left crankcase 25L, and a power transmission chain 34 is wound around.
  • the rotation of the clutch output gear 47 is reduced and transmitted to the power unit output shaft 31 via the reduction gear mechanism intermediate shaft 48, and is transmitted to the rear wheel 15 via the power transmission chain drive sprocket 32 and the power transmission chain 34 (FIG. 1). ).
  • the power unit output shaft 31 and the power transmission chain 34 are covered with a rear power unit cover 106.
  • An oil pump 71 is provided in front of the crankshaft 36 in the centrifugal clutch chamber 93.
  • the line L1 is the left outline of the main frame 4 of the vehicle body
  • the line L2 is the right outline of the main frame 4
  • the line L3 is the center line of the vehicle main frame 4
  • the outline L1 of the main frame 4 L2 is an intermediate line
  • line L4 is the cylinder axis, that is, the center line of the cylinder bore 73a
  • line L5 is the joint surface between the left and right crankcases 25L and 25R
  • line L6 is the joint surface between the right crankcase 25R and the inner transmission case 86.
  • Line L7 is a joint surface between the inner transmission case 86 and the outer transmission case 87.
  • FIG. 4 is a left side view of the cylinder portion 23 and the left crankcase 25L of the power unit 20 described above.
  • a continuous cam chain chamber 108 is formed on the left side of the cylinder block 73, the cylinder head 74, and the cylinder head cover 75, and communicates with the generator storage chamber 91.
  • a cam chain driven sprocket 80 is fitted into a protruding portion of the cam shaft 79 of the valve mechanism 78 provided at the boundary between the cylinder head 74 and the cylinder head cover 75 into the cam chain chamber 108.
  • a cam chain drive sprocket 82 is fitted to a protruding portion of the crankshaft 36 into the generator housing chamber 91.
  • An endless cam chain 81 is bridged between the cam chain drive sprocket 82 of the crankshaft 36 and the cam chain driven sprocket 80, and the cam chain 81 is rotated by the rotation of the crankshaft 36 to drive the camshaft 79.
  • a guide wheel 110 that protrudes from the cylinder block 73 into the cam chain chamber 108 is rotatably provided with a guide wheel 110 that engages with the upper and lower cam chains 81 to prevent the cam chain 81 from shaking. .
  • the left crankcase 25L is provided with a cam chain tensioner mechanism 111, which applies appropriate tension to the cam chain 81.
  • a tensioner arm 112 of the cam chain tensioner mechanism 111 is pivotally supported by a tensioner support shaft 113 above the crankshaft 36 of the wall portion of the left crankcase 25L.
  • the tensioner arm 112 extends before and after the tensioner support shaft 113.
  • the rear end of the rear arm 112r of the tensioner arm 112 abuts on the top of the push rod 115 of the oil lock cam chain lifter 114 of the cam chain tensioner mechanism 111 and is biased upward.
  • a tension sprocket 116 is pivotally supported at the front end of the front arm 112f of the tensioner arm 112, and meshes with the cam chain 81 delivered from the cam chain drive sprocket 82 so as to be pressed from above.
  • the oil-lock cam chain lifter 114 includes a guide cylinder 117 formed on the left surface of the left crankcase 25L and a push rod 115 slidably inserted into the guide cylinder 117.
  • the lower end of the guide cylinder 117 is closed with a sealing bolt 118.
  • the push rod 115 is biased upward by a coil spring 119 provided in the guide cylinder 117, and pushes the rear arm 112r of the tensioner arm 112 described above upward.
  • An oil sump 120 is formed on the upper portion of the guide cylinder 117, and the oil droplets in the storage chamber 91 such as a generator are collected and supplied into the guide cylinder 117.
  • a check valve 123 including a ball 121 and a valve seat 122 having a hole smaller in diameter than the ball diameter is formed at the lower end of the push rod 115.
  • the cam chain tensioner mechanism 111 urges the push rod 115 upward by the coil spring 119 of the oil lock cam chain lifter 114, and swings the tensioner arm 112 around the tensioner support shaft 113 as a tension sprocket. 116 is pressed against the cam chain 81, and the cam chain 81 is moderately tensioned.
  • an oil pump 71 is provided obliquely downward and forward of the crankshaft 36 of the right crankcase 25R.
  • the oil pump drive shaft 126 is connected to the inner rotor of the oil pump 71 as shown in FIG. 4, and the left end thereof is seen obliquely forward and downward from the crankshaft 36 of FIG.
  • the cam chain engagement sprocket 127 fixed to the oil pump drive shaft 126 engages with the cam chain 81 and rotates as the cam chain 81 rotates, and the oil pump is driven via the oil pump drive shaft 126.
  • the inner rotor of the oil pump 71 at the right end of the shaft 126 is rotationally driven.
  • the cam chain engagement sprocket 127 and the oil pump drive shaft 126 constitute an oil pump drive mechanism 128.
  • FIG. 5 is a cross-sectional view of the power unit 20 taken along the line VV of FIG.
  • the crankshaft 36 is rotatably supported by the left and right crankcases 25L and 25R.
  • a drive pulley 41 of a belt type continuously variable transmission 38 is provided at the right end of the crankshaft 36, and an AC generator 92 is provided at the left end of the crankshaft 36. Is provided.
  • a motor start mechanism 64 includes a starter motor 65, a drive pinion 66 provided on the rotation shaft of the starter motor 65, a motor start mechanism intermediate shaft 67, a motor start mechanism intermediate shaft large diameter gear 68, and a motor start mechanism intermediate shaft small diameter.
  • a gear 69, a motor start mechanism driven gear 70 provided on the left part of the crankshaft 36, and a one-way clutch 129 interposed between the motor start mechanism driven gear 70 and the crankshaft 36 are configured.
  • the tension sprocket 116 of the cam chain tensioner mechanism 111 and the cam chain engagement sprocket 127 of the oil pump drive mechanism 128 are provided between the left crankcase 25L and the motor start mechanism driven gear 70.
  • the cam chain engagement sprocket 127 is fixed to the left end of the oil pump drive shaft 126 in a cantilevered state.
  • the oil pump drive shaft 126 is rotatably supported by the bearing portions of the left and right crankcases 25L and 25R.
  • An inner rotor of the oil pump 71 is fixed to the right end of the oil pump drive shaft 126 and is rotated by the rotation of the cam chain 81.
  • Patent Document 1 an oil pump drive gear train and an oil pump are provided between the operating surface of the motor start mechanism driven gear provided on the left part of the crankshaft and the operating surface of the cam chain.
  • the oil pump was driven from the crankshaft. Since the volume occupied by the gear train and the oil pump is large, the generator protrudes outside the power unit.
  • FIG. 6 is a view showing a cross section of the inside of the centrifugal clutch chamber 93 on the right side of the right crankcase 25R and one side portion of the cylinder portion 23.
  • the crankshaft 36, the rotation shaft of the kick start mechanism 53 and a part of the gear group, the driven pulley shaft 40, the wet centrifugal clutch 45, the output gear 47 of the wet centrifugal clutch 45, and the oil pump 71 are shown.
  • the oil pump drive shaft 126, the oil inflow portion 131, and the oil discharge portion 132 inside the oil pump 71 are indicated by dotted lines.
  • An oil strainer 133 is provided below the oil pump 71, and an oil inflow passage 134 is connected to the oil inflow portion 131.
  • the cylinder block 73, the cylinder head 74, and the cylinder head cover 75 are overlapped with one end of the crankcase 25, and are connected to the crankcase 25 by a stud bolt 136 inserted through a stud bolt insertion hole 135 provided in these members. Has been.
  • FIG. 7 is a view showing the inside of the crank chamber 88, the kick start mechanism gear chamber 63, and the reduction gear chamber 89 on the right surface of the left crankcase 25L.
  • the figure shows the crankshaft 36, the rotation shaft and gear group of the reduction gear mechanism 46, the power unit output shaft 31, and the rotation shaft and gear group of the kick start mechanism 53 (see FIG. 2).
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7, and includes a belt type continuously variable transmission driven pulley shaft 40, a power unit output shaft 31, and a kick shaft 54. An oil passage that continues to the left crankcase 25L, the right crankcase 25R, and the inner transmission case 86 is shown.
  • FIG. 9 is an enlarged view of the periphery of the crankshaft 36 shown in FIG.
  • FIG. 10 is an enlarged view around the belt type continuously variable transmission driven pulley shaft 40 and the reduction gear mechanism intermediate shaft 48 shown in FIG.
  • an oil passage A is bored from the oil discharge portion 132 of the oil pump 71 toward the mating surface between the right crankcase 25 ⁇ / b> R and the cylinder block 73.
  • a groove-like oil passage B connected to the oil passage A is cut off on the mating surface of the right crankcase 25R and the inner transmission case 86, and this oil passage B is further connected to an oil passage C parallel to the crankshaft 36.
  • the oil passage D communicates with the oil passage D formed in the wall portion of the right crankcase 25R, and the oil passage D communicates with the outer periphery of the right ball bearing 90B that supports the crankshaft 36 of FIG.
  • the oil supplied through the oil passage is ejected toward the crank pin 37, and the crank rod center hole oil passage E and the small diameter oil passage extending radially outward from the center hole oil passage E are connected to the connecting rod 77.
  • the oil is ejected from the side of the large end of the connecting rod 77 and lubricates the inside of the crank chamber 88.
  • an oil passage F directed leftward is provided at one end of the oil discharge portion 132. Its cross section is shown in FIG. In FIG. 9, oil is injected from the nozzle G at the back end of the oil passage F toward the lower surface of the piston 76 to lubricate the inside of the cylinder bore 73a.
  • the ball bearings 90A and 90B that support the crankshaft 36 are lubricated by the above-mentioned jetting or sprayed oil droplets.
  • the oil passage A connected to the oil discharge portion 132 of the oil pump 71 reaches the mating surface between the right crankcase 25R and the cylinder block 73.
  • a groove-like oil passage H is cut in a part of the mating surface of the cylinder block 73 with respect to the right crankcase 25R, communicates with the oil passage A, and communicates with the stud bolt insertion hole 135 at the other end.
  • the rotating portion of the valve operating mechanism 78 is lubricated by the oil supplied through the oil passage J.
  • the oil passage C provided on the mating surface of the right crankcase 25R in FIG. 6 communicates with the oil passage K on the mating surface of the left crankcase 25L shown in FIG.
  • a plurality of ribs project from the right surface of the left crankcase 25L, and one of the ribs 138 is provided with a groove-like oil passage L connected to the oil passage K, and reaches the end M of the groove-like oil passage L. Yes.
  • the surface of the rib 138 forms a mating surface corresponding to the surface of a rib (not shown) provided on the left surface of the right crankcase 25R, and the open side of the grooved oil passage L is covered. As shown in FIG.
  • the terminal end M of the groove-like oil passage L is connected to an oil passage N extending toward the left surface of the left crankcase 25L, and its end is as shown in FIG. 8 and FIG.
  • the oil passage P extends upward, and its end is opened to the side surface of the left bearing 104A of the reduction gear mechanism intermediate shaft 48 of FIG. 10, and lubricates this bearing.
  • the supplied oil lubricates the right bearing 104B of the intermediate shaft 48 through the center hole oil passage Q of the intermediate shaft 48 and the small-diameter oil passage in the radial direction.
  • Oil leaking from the side surfaces of the bearings 104A and 104B of the intermediate shaft 48 lubricates the meshing surfaces of the intermediate shaft small diameter gear 50 and the power unit output shaft large diameter gear 51, and also lubricates the bearings 105A and 105B of the power unit output shaft 31.
  • the end M of the groove-like oil passage L in FIG. 7 is an oil passage R opened to the side of the left ball bearing 95A of the belt type continuously variable transmission driven pulley shaft 40, as seen in FIG.
  • the left ball bearing 95A is continuously lubricated.
  • the supplied oil passes through the center hole oil passage S of the belt type continuously variable transmission driven pulley shaft 40 and the small diameter oil passage radially outward from the center hole oil passage S, and then the centrifugal clutch output gear.
  • the needle bearing 103 that rotatably supports 47 is lubricated. As shown in FIG.
  • the oil flowing out from the left side of the needle bearing 103 lubricates the meshing surface of the clutch output gear 47 and the intermediate shaft large diameter gear 49 that meshes with the clutch output gear 47, and flows out from the right side of the needle bearing 103.
  • the oil lubricates the inner surface of the clutch outer 102 of the wet centrifugal clutch 45.
  • a wide recess T is provided in the middle of the oil passage L on the right side of the left crankcase 25L. As shown in FIG. 8, this is connected to the left end of the through oil passage U in the left-right direction drilled in the right crankcase 25 ⁇ / b> R, and the right end of the through oil passage U is formed in the inner transmission case 86. It is connected to the oil passage V.
  • the oil passage V further continues to the downward oil passage W in the inner transmission case 86, and the downward oil passage W reaches the right ball bearing 95B of the belt type continuously variable transmission driven pulley shaft 40 and lubricates it.
  • this embodiment provides the following effects. (1) Since the oil pump 71 is disposed on the side opposite to the cam chain 81 and the generator 92 with respect to the cylinder axis L4 of the internal combustion engine, the extension of the generator 92 to the outside can be reduced. (2) Since it is not necessary to provide a dedicated gear train connected to the crankshaft 36 for driving the oil pump 71, the protrusion of the power unit 20 on the generator 92 side is suppressed, and the oil pump 71 can be brought closer to the cylinder axis L4 direction. The oil supply passage to the cylinder head 74 can also be shortened.
  • the oil pump drive shaft 126 that supports the sprocket 127 that meshes with the cam chain 81 does not have a bearing outside the sprocket 127 and is cantilevered by the crankcase 25. Can suppress overhanging.
  • the bearings of the oil pump drive shaft 126 are respectively provided on one of the divided crankcases 25L and the other 25R, and the oil pump drive shaft 126 is supported with a long span, so that it is stable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • General Details Of Gearings (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
PCT/JP2009/052987 2008-03-28 2009-02-20 車両のパワーユニット WO2009119210A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980106534XA CN101960104B (zh) 2008-03-28 2009-02-20 车辆动力单元
BRPI0909253-6A BRPI0909253B1 (pt) 2008-03-28 2009-02-20 unidade de força de veículo

Applications Claiming Priority (2)

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JP2008087907A JP5171343B2 (ja) 2008-03-28 2008-03-28 車両のパワーユニット
JP2008-087907 2008-03-28

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CN (1) CN101960104B (es)
AR (1) AR070727A1 (es)
BR (1) BRPI0909253B1 (es)
CO (1) CO6311027A2 (es)
PE (1) PE20100340A1 (es)
WO (1) WO2009119210A1 (es)

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KR101201730B1 (ko) * 2012-04-25 2012-11-15 이춘우 변속가능한 병진구동장치
CN102862645A (zh) * 2012-09-13 2013-01-09 江门市大长江集团有限公司 一种摩托车发动机
JP5998832B2 (ja) * 2012-10-15 2016-09-28 スズキ株式会社 内燃機関
JP6404764B2 (ja) * 2014-09-30 2018-10-17 本田技研工業株式会社 ローラー式チェーンテンショナ装置
JP6630218B2 (ja) * 2016-03-31 2020-01-15 本田技研工業株式会社 内燃機関
JP2020084976A (ja) * 2018-11-30 2020-06-04 本田技研工業株式会社 内燃機関

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000274241A (ja) * 1999-03-24 2000-10-03 Honda Motor Co Ltd 内燃機関の補機取付け構造
WO2003085278A1 (fr) * 2002-04-08 2003-10-16 Yamaha Hatsudoki Kabushiki Kaisha Structure de lubrification de mecanisme d'embrayage du moteur
JP2007024007A (ja) * 2005-07-21 2007-02-01 Honda Motor Co Ltd 内燃機関の潤滑装置
JP2007177689A (ja) * 2005-12-28 2007-07-12 Honda Motor Co Ltd パワーユニット

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3975144B2 (ja) * 2002-09-26 2007-09-12 本田技研工業株式会社 ４サイクル単気筒エンジン付きパワーユニット

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000274241A (ja) * 1999-03-24 2000-10-03 Honda Motor Co Ltd 内燃機関の補機取付け構造
WO2003085278A1 (fr) * 2002-04-08 2003-10-16 Yamaha Hatsudoki Kabushiki Kaisha Structure de lubrification de mecanisme d'embrayage du moteur
JP2007024007A (ja) * 2005-07-21 2007-02-01 Honda Motor Co Ltd 内燃機関の潤滑装置
JP2007177689A (ja) * 2005-12-28 2007-07-12 Honda Motor Co Ltd パワーユニット

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BRPI0909253B1 (pt) 2019-10-29
PE20100340A1 (es) 2010-05-11
CO6311027A2 (es) 2011-08-22
CN101960104A (zh) 2011-01-26
CN101960104B (zh) 2013-06-19
BRPI0909253A2 (pt) 2015-08-18
AR070727A1 (es) 2010-04-28
JP5171343B2 (ja) 2013-03-27
JP2009243288A (ja) 2009-10-22

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