WO2012160959A1 - エンジン及び鞍乗型車両 - Google Patents
エンジン及び鞍乗型車両 Download PDFInfo
- Publication number
- WO2012160959A1 WO2012160959A1 PCT/JP2012/061762 JP2012061762W WO2012160959A1 WO 2012160959 A1 WO2012160959 A1 WO 2012160959A1 JP 2012061762 W JP2012061762 W JP 2012061762W WO 2012160959 A1 WO2012160959 A1 WO 2012160959A1
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- WO
- WIPO (PCT)
- Prior art keywords
- engine
- cylinder head
- chain
- cylinder
- support
- Prior art date
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Classifications
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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- 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
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
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- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0804—Leaf springs
Definitions
- the present invention relates to an engine and a straddle-type vehicle.
- it relates to the structure of a tensioner that applies tension to the cam chain.
- a motorcycle which is a type of straddle-type vehicle, is known.
- An engine provided in a motorcycle is disclosed, for example, in Japanese Patent Application Laid-Open No. 2009-228673.
- JP 2009-228673 A the power of the crankshaft is transmitted to the camshaft via the cam chain.
- the cam chain is disposed in the chain chamber.
- the chain chamber is formed across the crankcase, the cylinder body and the cylinder head.
- the cam chain is tensioned to prevent slack.
- the engine described in JP 2009-228673 A includes a tensioner that presses the chain guide against the cam chain. The tension is applied to the cam chain by this tensioner.
- JP 2009-228673 A includes a tensioner in addition to the cam chain guide. Therefore, the number of parts increases.
- An object of the present invention is to provide an engine capable of tensioning a cam chain with a small number of parts and a straddle type vehicle provided with the engine.
- the engine of the present invention is an engine having a chain chamber, and includes a crankshaft, a camshaft, a first sprocket attached to the crankshaft, a second sprocket attached to the camshaft, and a first sprocket.
- the crankcase, the cylinder body and the cylinder head form a chain chamber for accommodating the chain and the tension applying member, and the tension applying member includes a plate spring member and a plate spring member.
- the engine further includes a support shaft which is inserted through a support hole formed in the contact member and supports the tension applying member in a pivotable manner, and a supported portion formed on the contact member. And a support portion for supporting the tension applying member by contacting the support portion. The support portion supports the supported portion so that the supported portion can slide in the chain chamber when the tension applying member swings around the support shaft.
- the engine of the present invention can apply tension to the cam chain with a small number of parts.
- FIG. 1 is a left side view showing an entire configuration of a motorcycle according to a first embodiment of the present invention.
- FIG. 2 is a plan cross-sectional view showing a front portion of a power unit of the motorcycle shown in FIG. 1;
- FIG. 2 is a cross-sectional plan view showing the rear of the power unit of the motorcycle shown in FIG. 1; It is a partial sectional view which looked at a chain room from the left side.
- FIG. 3 is a plan sectional view showing a part of FIG. 2 in an enlarged manner.
- FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5; It is a plane sectional view showing the attachment structure of a tensioner.
- FIG. 5 is a left side sectional view showing a part of FIG.
- FIG. 4 It is IX-IX sectional drawing of FIG. It is sectional drawing which looked at a part of chain chamber by 2nd Embodiment of this invention from the left side. It is the fragmentary sectional view which looked at the chain room by a 3rd embodiment of the present invention from the left side.
- a motorcycle 10 according to a first embodiment of the present invention will be described with reference to the drawings.
- a scooter type motorcycle will be described as an example of the motorcycle 10.
- the same or corresponding portions in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.
- FIG. 1 is a left side view of a motorcycle 10 according to a first embodiment of the present invention.
- front, rear, left, and right directions are referred to as front, rear, left, and right as viewed from an occupant seated on the seat 22 of the motorcycle 10.
- the arrow F in the figure indicates the forward direction of the motorcycle 10, and the arrow U indicates the upward direction of the motorcycle 10.
- the motorcycle 10 includes a vehicle body 12, a front wheel 14 provided at the front of the motorcycle 10, and a rear wheel 16 provided at the rear of the motorcycle 10.
- the vehicle body 12 mainly includes a vehicle body frame 18, a steering wheel 20, a seat 22 and a power unit 24.
- the body frame 18 supports the power unit 24 and the seat 22 and the like.
- the vehicle body frame 18 is shown by a broken line.
- the body frame 18 has a head pipe 19.
- a steering shaft is rotatably inserted into the head pipe 19.
- a handle 20 is attached to the upper end of the steering shaft.
- Front forks 26 are attached to both ends of the steering shaft.
- a front wheel 14 is rotatably attached to the lower end of the front fork 26.
- the body frame 18 is formed of a rigid metal such as steel.
- the body frame 18 is covered by a body cover 28.
- the body cover 28 is made of resin.
- the body cover 28 includes a footboard 30, a front cover 32, a handle cover 34, a front fender 36, a rear fender 37, and a side cover 38.
- the footboard 30 is provided below the seat 22.
- the footboard 30 extends in the front-rear direction.
- the front cover 32 is located in front of the seat 22.
- the front cover 32 is provided to cover the head pipe 19.
- a headlight 42 is disposed on the front cover 32.
- the handle cover 34 covers a portion of the handle 20.
- the handle cover 34 is provided above the front cover 32.
- a panel for displaying measuring instruments such as a speed meter (not shown) is attached to the handle cover 34.
- the front fender 36 is disposed above the front wheel 14.
- the front fender 36 is disposed below the front cover 32.
- the front fender 36 is provided to project forward relative to the front cover 32.
- the side cover 38 is provided below the seat 22.
- the side cover 38 is located above the rear wheel 16.
- the rear fender 37 is disposed above the rear wheel 16.
- the side cover 38 extends rearward from below the seat 22.
- the handle 20 is disposed in front of an occupant seated on the seat 22.
- the handle 20 extends in the left-right direction. At both ends of the handle 20, grips that can be gripped by the occupant are disposed.
- the seat 22 is disposed above the power unit 24. Below the seat 22, a storage space capable of storing a helmet or the like is provided.
- the power unit 24 is disposed near the rear wheel 16.
- the power unit 24 is rotatably supported in the vertical direction with respect to the vehicle body frame 18.
- An engine 44, a crankcase 84 and a transmission case 89 provided in the power unit 24 are exposed from the vehicle body cover 28. Details of the power unit 24 will be described later.
- FIG. 2 is a plan sectional view showing the structure in the engine 44 and the crankcase 84 of the power unit 24.
- FIG. FIG. 3 is a plan sectional view showing the structure of the transmission 46 of the power unit 24.
- FIG. FIG. 3 shows the rear structure of FIG.
- the arrow F shows the front direction of a vehicle
- the arrow L shows the left direction of a vehicle.
- the power unit 24 is a swing arm type power unit.
- the power unit 24 mainly includes an engine 44 (FIG. 2), a transmission 46 (FIGS. 2 and 3) disposed on the left side of the engine 44, and a centrifugal clutch 48 disposed on the left side of the transmission 46 (FIG. And 3).
- the transmission 46 is a continuously variable transmission using a V-belt 54.
- the transmission 46 has a drive pulley 50, a driven pulley 52 and a V-belt 54.
- the drive pulley 50 is attached to the left end of a crankshaft 56 provided on the engine 44.
- the drive pulley 50 has a first drive pulley 58 and a second drive pulley 60.
- the first drive pulley 58 is disposed to face the second drive pulley 60.
- the second drive pulley 60 is disposed on the left side of the first drive pulley 58.
- the first drive pulley 58 and the second drive pulley 60 respectively have inclined surfaces 62 which are gradually separated from each other in the outer circumferential direction.
- the drive pulley 50 is provided with a gap control mechanism 64 for controlling the gap between the first drive pulley 58 and the second drive pulley 60.
- the distance control mechanism 64 has a plurality of weight rollers 66 and a disk member 68 provided on the right side of the first drive pulley 58.
- the disk member 68 is formed of a material having high rigidity.
- the driven pulley 52 will be described with reference to FIG. FIG. 3 shows the centrifugal clutch 48 and the transmission 46.
- the driven pulley 52 receives power from the drive pulley 50 and rotates.
- the driven pulley 52 is attached to a first output shaft 70 disposed parallel to the crankshaft 56.
- the driven pulley 52 has a first driven pulley 72 and a second driven pulley 74 disposed on the right side of the first driven pulley 72.
- a force is applied to the right of FIG. 3 from a spring 76 supported on the plate of the centrifugal clutch 48 so that the first driven pulley 72 approaches the second driven pulley 74.
- the V-belt 54 transmits the power of the drive pulley 50 to the driven pulley 52.
- the V-belt 54 is stretched around the drive pulley 50 and the driven pulley 52. More specifically, the V-belt 54 is disposed so as to be sandwiched between the first drive pulley 58 and the second drive pulley 60 and also be sandwiched between the first driven pulley 72 and the second driven pulley 74.
- the centrifugal clutch 48 is connected to the left side of the driven pulley 52 of the transmission 46.
- the centrifugal clutch 48 is provided at one end of the first output shaft 70.
- the centrifugal clutch 48 mainly includes a clutch housing 78, a clutch shoe 80 and a clutch spring 82. As the rotational speed of the drive pulley 50 increases, the rotational speed of the clutch shoe 80 also increases.
- the clutch shoe 80 is pressed against the clutch housing 78 by centrifugal force, and the rotational force of the clutch shoe 80 is transmitted to the clutch housing 78.
- the power transmitted to the clutch housing 78 is transmitted to the first output shaft 70 connected to the clutch housing 78.
- a second output shaft 180 to which the rear wheel 16 is connected is disposed. Power can be transmitted between the first output shaft 70 and the second output shaft 180 via a gear (not shown).
- the engine 44 is a device that generates the power of the motorcycle 10.
- the engine 44 is an air-cooled engine.
- the engine 44 mainly includes a crankshaft 56, a crankcase 84, a cylinder 88, a piston 86, and a power transmission mechanism 90.
- a piston 86 is disposed in front of the crankshaft 56.
- a power transmission mechanism 90 is disposed on the left side of the piston 86.
- the crankshaft 56 receives power from the piston 86 and rotates.
- the crankshaft 56 mainly includes a crank pin 92, a first crank web 94, a second crank web 96, a first crankshaft 98 and a second crankshaft 100.
- crank pin 92 connects the crankshaft 56 and the connecting rod 122 of the piston 86.
- the first crank web 94 supports the crank pin 92.
- the first crank web 94 is provided with a weight 102 for reducing the inertial force generated by the vibration of the piston 86 and the connecting rod 122.
- the first crank web 94 is a flat member.
- the second crank web 96 supports the crank pin 92.
- the second crank web 96 is disposed to face the first crank web 94.
- the second crank web 96 is provided with a weight 104 for reducing the inertial force generated by the vibration of the piston 86 and the connecting rod 122.
- the second crank web 96 is a flat member.
- the first crankshaft 98 is connected to the first crank web 94.
- the first crankshaft 98 extends in a direction substantially orthogonal to the first crank web 94.
- a drive pulley 50 of the transmission 46 is provided.
- the second crankshaft 100 is connected to the second crank web 96.
- the second crankshaft 100 extends in a direction substantially orthogonal to the second crank web 96.
- a generator 106 is provided at the tip of the second crank shaft 100. The generator 106 generates power.
- the crankcase 84 supports the crankshaft 56 via a bearing. Behind the crankcase 84, a transmission case 89 is disposed. The transmission 46 and the like are accommodated in the transmission case 89.
- the cylinder 88 guides the linear reciprocating motion of the piston 86.
- the cylinder 88 has a cylinder body 126 and a cylinder head 128.
- the cylinder body 126 is provided with a cylinder bore 132 having a circular cross section.
- a piston 86 is disposed in the cylinder bore 132 of the cylinder body 126. The traveling direction of the piston 86 is guided by the cylinder bore 132.
- the cylinder body 126 is attached to the crankcase 84.
- the cylinder head 128 is attached to the cylinder body 126. More specifically, the cylinder head 128 is disposed to face the crankcase 84 with the cylinder body 126 interposed therebetween.
- the cylinder head 128 is provided with a wall surface defining a combustion chamber 114 which is continuous with the cylinder bore 132 of the cylinder body 126.
- the combustion chamber 114 is provided with a plurality of holes (not shown) connected to the outside of the combustion chamber 114.
- a valve (not shown) is provided in the hole, and the valve is driven when the combustion chamber 114 is suctioned and exhausted from the combustion chamber 114.
- the combustion chamber 114 is provided with a fuel supply device (not shown) for supplying fuel.
- the cylinder head 128 is attached with an igniter 198 for igniting the mixture in the fuel chamber 114.
- the cylinder head 128 is provided with a camshaft 142 for driving a plurality of valves provided in the fuel chamber 114.
- the piston 86 constitutes a combustion chamber 114 together with the cylinder head 128 of the engine 44.
- the piston 86 receives pressure from the combustion gas of the combustion chamber 114 to rotate the crankshaft 56.
- the piston 86 is attached to the crankshaft 56.
- the piston 86 has a piston head 116, a piston ring 118, a piston pin 120 and a connecting rod 122.
- the piston head 116 has a disc-like tip end face 124 and a cylindrical portion which extends vertically rearward from the circumferential end of the tip end face 124.
- the piston head 116 is formed with a piston boss on the side surface into which the piston pin 120 can be inserted.
- On the front side of the piston boss of the piston head 116 three ring grooves into which the piston ring 118 can be inserted are formed.
- a valve relief is formed on the tip end surface 124 of the piston head 116.
- the piston ring 118 has two compression rings and an oil ring.
- the compression ring is inserted into the two ring grooves closer to the end face 124.
- the oil ring prevents the mixture and the combustion gas from leaking from the gap between the piston 86 and the cylinder body 126 of the cylinder 88.
- the oil ring scrapes off the oil in the guide wall of the cylinder body 126.
- the piston pin 120 is inserted into the piston boss of the piston head 116 to connect the connecting rod 122 and the piston head 116.
- the connecting rod 122 transmits the motion of the piston head 116 to the crankshaft 56.
- the connecting rod 122 is connected to the piston head 116 and the crankshaft 56.
- the connecting rod 122 has cylindrical holes into which crank pins 92 or piston pins 120 can be inserted at both ends.
- the power transmission mechanism 90 transmits the power of the crankshaft 56 to the camshaft 142, and drives a plurality of valves provided in the combustion chamber 114.
- the configuration of the power transmission mechanism 90 will be described in detail later.
- FIG. 4 is a partial sectional view of the chain chamber 210 as viewed from the left side.
- FIG. 5 is a plan sectional view showing a part of FIG. 2 in an enlarged manner.
- 6 is a cross-sectional view taken along the line VI-VI of FIG.
- FIG. 7 is a plan sectional view showing the mounting structure of the tensioner 158.
- arrow F indicates the forward direction of the vehicle
- arrow U indicates the upward direction of the vehicle in FIG. 4
- arrow L indicates the left direction of the vehicle in FIG. Indicates the downward direction.
- the power transmission mechanism 90 is accommodated in the chain chamber 210.
- the power transmission mechanism 90 has a first sprocket 108, a second sprocket 146, a cam chain 154, a chain guide 156 and a tensioner 158.
- the chain chamber 210 is provided on the left side of the piston 86.
- the chain chamber 210 has a first space 110 provided in the crankcase 84, a second space 138 provided in the cylinder body 126, and a third space 148 provided in the cylinder head 128.
- the first space 110 accommodates the first sprocket 108.
- the first space 110 extends in a direction orthogonal to a straight line connecting the axial center of the crankshaft 56 and the axial center of the camshaft 142 in the axial direction of the crankshaft 56, ie, in a direction (vertical direction) orthogonal to the sheet of FIG. ing. In other words, it extends in the direction orthogonal to the plane including the crankshaft 56 and the camshaft 142.
- the first space 110 is surrounded by the first wall 184, the second wall 186, the third wall 188, the fourth wall 190, and the like.
- the first space 110 is further covered by the crankcase 84 also in the vertical direction.
- a bearing 182 supporting the first crankshaft 98 is attached to the first wall 184.
- the second wall 186 is disposed on the right side of the drive pulley 50, as shown in FIG.
- the third wall 188 connects the first wall 184 and the second wall 186.
- the fourth wall 190 has a first opening 112 exposing the first space 110.
- the second wall 186 and the third wall 188 and the fourth wall 190 are connected by a bolt 192.
- the second wall 186 covers the opening 187 formed in the crankcase 84.
- FIG. 4 shows the second wall 186 removed and the opening 187 visible.
- the second space 138 is formed in the cylindrical portion 194 of the cylinder body 126.
- the cylindrical portion 194 has four walls 212a to 212d. Each wall 212a-212d extends longitudinally. Each wall 212a-212d is integrally formed with the adjacent wall 212a-212d. Of the four walls 212a to 212d, the pair of walls 212a and 212b are opposed in the vertical direction, and the pair of walls 212c and 212d are opposed in the lateral direction (the axial direction of the camshaft 142). At one end of the cylindrical portion 194, a second opening 136 overlapping the first opening 112 is formed. A third opening 140 for exposing the second space 138 is formed at the other end of the cylindrical portion 194.
- the cylindrical portion 194 is open only at one end and the other end.
- the cylindrical portion 194 communicates with the outside of the second space 138 only at one end and the other end.
- the first space 110 and the second space 138 are connected via the first opening 112 and the second opening 136.
- the first space 110 is connected to the second space 138 via one end of the cylindrical portion 194.
- the second space 138 is disposed on the left side of the cylinder bore 132.
- the second space 138 is a space having a rectangular cross section.
- the third space 148 accommodates a second sprocket 146 attached to the end of the camshaft 142.
- a fourth opening 144 overlapping the third opening 140 is formed.
- the second space 138 and the third space 148 are connected via the third opening 140 and the fourth opening 144. That is, the third space 148 is connected to the second space 138 via the other end of the cylindrical portion 194.
- the cylinder head 128 includes a cylinder head body 214 and a head cover 216.
- the cylinder head body 214 has a fourth opening 144 and is attached to the cylinder body 126.
- the cylinder head body 214 has four walls 218a to 218d. Each wall 218a-218d extends back and forth. Each wall 218a-218d is integrally formed with the adjacent wall 218a-218d. The rear ends of the respective walls 218a to 218d are superimposed on the cylinder body 126. Among the four walls 218a to 218d, the pair of walls 218a and 218b are opposed in the vertical direction, and the pair of walls 218c and 218d are opposed in the lateral direction (the axial direction of the camshaft 142).
- the head cover 216 covers the front end of the cylinder head body 214.
- the head cover 216 forms a third space 148 together with the cylinder head body 214.
- a seal rubber 220 is disposed between the cylinder head body 214 and the head cover 216. Thereby, the sealability between the cylinder head body 214 and the head cover 216 is secured.
- the cylinder head body 214, the cylinder body 126 and the crankcase 84 respectively have through holes 222a to 222c.
- One end of the through hole 222 a of the crankcase 84 opens to the inner surface of the crankcase 84, and the other end opens to the overlapping surface with the cylinder body 126.
- One end of the through hole 222 b of the cylinder body 126 opens in the overlapping surface with the crankcase 84, and the other end opens in the overlapping surface with the cylinder head body 214.
- One end of the through hole 222 c of the cylinder head main body 214 opens in the overlapping surface with the cylinder body 126, and the other end opens in the end surface on the head cover 216 side.
- a through hole 222 a of crank case 84 and a through hole 222 b of cylinder body 126 are connected.
- the through hole 222 b provided in the cylinder body 126 and the through hole 222 c provided in the cylinder head main body 214 are connected.
- Three through holes 222a to 222c are aligned in the front-rear direction.
- Bolts 224 are inserted into the through holes 222a to 222c. By screwing bolt 224 to crankcase 84, crankcase 84, cylinder body 126 and cylinder head body 214 are connected.
- the bolt 224 prevents the crankcase 84, the cylinder body 126 and the cylinder head body 214 from being displaced in the direction perpendicular to the front-rear direction.
- the crankcase 84, the cylinder body 126 and the cylinder head body 214 are each made of, for example, an aluminum alloy or the like.
- the bolt 224 is made of a material having a smaller coefficient of thermal expansion than the material forming the crankcase 84, the cylinder body 126 and the cylinder head body 214. Such material is, for example, steel and the like.
- FIG. 6 in the present embodiment, six bolts 224a to 224f are provided.
- the bolt 224a is illustrated.
- the three bolts 224a to 224c are located on the lower end side of the chain chamber 210 and the cylinder bore 132 when viewed in the front-rear direction (the direction perpendicular to the paper surface of FIG. 6).
- the three bolts 224 d to 224 f are located on the upper end side of the chain chamber 210 and the cylinder bore 132 as viewed in the front-rear direction.
- the two bolts 224 a and 224 d are located on the left side of the chain chamber 210 as viewed in the front-rear direction.
- the two bolts 224 b and 224 e are located on the right side of the chain chamber 210 and on the left side of the cylinder bore 132 as viewed in the front-rear direction.
- the two bolts 224 c and 224 f are located on the right side of the cylinder bore 132 as viewed in the front-rear direction.
- the four bolts 224a, 224b, 224d, 224e surround the chain chamber 210 as viewed from the front-rear direction.
- the four bolts 224 b, 224 c, 224 e, and 224 f surround the cylinder bore 132 as viewed from the front-rear direction.
- the two bolts 224a and 224d are farther from the cylinder bore 132 than the two bolts 224b and 224e. Therefore, the two bolts 224a and 224d are less susceptible to the heat during operation of the engine 44 than the two bolts 224b and 224e. Since four bolts 224a, 224b, 224d, 224e including such two bolts 224a, 224d are arranged to surround the chain chamber 210, the influence of the thermal expansion of the crankcase 84 and the cylinder head body 214 (The possibility that the position of the crankcase 84 and the cylinder head body 214 is shifted and the tensioner 158 can not apply the target tension to the cam chain 154) can be further reduced.
- the first sprocket 108 is attached to the first crankshaft 98.
- the first sprocket 108 is provided adjacent to the first crank web 94.
- the first sprocket 108 is a disk-shaped member.
- the second sprocket 146 is a disk-shaped member having a diameter larger than that of the first sprocket 108.
- the second sprocket 146 is bolted to the end of the camshaft 142.
- the cam chain 154 transmits the power of the first sprocket 108 to the second sprocket 146.
- the cam chain 154 is wound around the first sprocket 108 and the second sprocket 146.
- the cam chain 154 is disposed across the first space 110, the second space 138 and the third space 148.
- a silent chain is used as the cam chain 154 in the present embodiment.
- the chain guide 156 guides the cam chain 154.
- the chain guide 156 is disposed across the first space 110, the second space 138 and the third space 148.
- the chain guide 156 is supported by a first guide support portion 160 housed in the crankcase 84 and a second guide support portion 162 attached to the cylinder body 126.
- the second guide support portion 162 is provided on the chain guide 156.
- the chain guide 156 is formed by baking a rubber on a bent plate-like member.
- the chain guide 156 extends from the first space 110 toward the third space 148. In other words, the chain guide 156 extends in the front-rear direction.
- One end of the chain guide 156 extends in the front-rear direction to the vicinity of the camshaft 142 which is the rotation center of the second sprocket 146.
- the chain guide 156 extends to the vicinity of a crankshaft 56, the other end of which is the rotation center of the first sprocket 108.
- the tensioner 158 applies tension to the cam chain 154.
- the tensioner 158 is disposed across the first space 110, the second space 138 and the third space 148.
- the tensioner 158 has a leaf spring 166 and a blade shoe 168.
- the leaf spring 166 is elastically deformed in response to the force from the cam chain 154.
- the plate spring 166 is, for example, a plate spring made of spring steel and has a rectangular shape.
- the plate spring 166 is a combination of a plurality of plate springs.
- the plate spring 166 may be configured of one plate spring.
- the plate spring 166 is curved in an arc shape in a state where no external force is applied.
- the plate spring 166 is elastically deformed when an external force is applied in the thickness direction (in the embodiment, the overlapping direction of the plurality of plate springs, ie, the vertical direction as shown in FIG. 4).
- the blade shoe 168 is attached to the leaf spring 166.
- the blade shoe 168 supports the leaf spring 166.
- the blade shoe 168 allows elastic deformation of the leaf spring 166.
- the blade shoe 168 contacts the cam chain 154.
- the blade shoe 168 is formed of, for example, a synthetic resin material.
- the blade shoe 168 includes a main body portion 226, a supported portion 228, and an attachment portion 230.
- Body portion 226 extends along leaf spring 166.
- the main body portion 226 has substantially the same width as the leaf spring 166.
- the main body portion 226 has a convex curved surface 232 and a concave curved surface 234.
- the convex curved surface 232 contacts the cam chain 154 between the first sprocket 108 and the second sprocket 146.
- a leaf spring 166 is disposed along the concave curved surface 234. When an external force acts from the convex curved surface 232 side to the concave curved surface 234 side, the leaf spring 166 is elastically deformed.
- the main body portion 226 includes a pair of support pieces 236, 236.
- the pair of support pieces 236, 236 are provided separately in the front-rear direction. The pair of support pieces 236, 236 prevent the leaf spring 166 from moving in the left-right direction and coming off the blade shoe 168.
- the supported portion 228 is provided at one end of the main body portion 226.
- the supported portion 228 contacts the leaf spring 166 and supports one end (front end) of the leaf spring 166 together with the main body portion 226.
- the tip end portion of the supported portion 228 contacts the plate spring 166.
- a gap is formed between the base end of the supported portion 228 (the end connected to the main body portion 226) and the front end of the plate spring 166.
- the front end of the plate spring 166 is allowed to move toward the front end of the main body portion 226.
- the mounting portion 230 is provided at the other end of the main body portion 226.
- the mounting portion 230 contacts the plate spring 166 and supports the other end (rear end) of the plate spring 166 together with the main body portion 226.
- the tip end portion of the mounting portion 230 contacts the plate spring 166.
- a gap is formed between the base end of the mounting portion 230 (the end connected to the main body portion 226) and the rear end of the plate spring 166.
- the rear end of the plate spring 166 is allowed to move toward the rear end of the main body portion 226.
- the mounting portion 230 includes a support hole 238 as shown in FIG.
- the support shaft 240 is inserted into the support hole 238.
- the support shaft 240 is screwed to the crankcase 84.
- a bolt portion 242 is formed at one end of the support shaft 240.
- Screw holes 243 are formed in the crankcase 84.
- the support shaft 240 is screwed to the crankcase 84 by the bolt portion 242 and the screw hole 243.
- the support shaft 240 screwed to the crankcase 84 is located above the first sprocket 108, as shown in FIG.
- the support shaft 240 extends substantially parallel to the crankshaft 56.
- the tensioner 158 can swing around the support shaft 240. Specifically, the tensioner 158 is swingable in the direction of the arrow R shown in FIG. In this state, the supported portion 228 contacts the inner surface of the cylinder head 128. The supported portion 228 may contact the cylinder body 126 in a state in which the tensioner 158 can swing around the support shaft 240.
- the slide surface 244 is a surface of the inner circumferential surface 211 of the chain chamber 210 that defines the upper end of the chain chamber 210.
- the slide surface 244 is a surface with which the supported portion 228 contacts when the tensioner 158 is disposed so as to be pivotable around the support shaft 240.
- the slide surface 244 is a surface with which the supported portion 228 contacts when the tensioner 158 is inserted into the chain chamber 210, as described later.
- the slide surface 244 is composed of the inner side surface 213 of the wall 212 b of the cylindrical portion 94 and the inner side surface 219 of the wall 218 b of the cylinder head body 214.
- the supported surface 228 contacts the inner surface 219 in a state where the tension applying member is disposed so as to be pivotable around the support shaft 240.
- FIG. 8 is a left side sectional view showing a part of FIG. 4 in an enlarged manner.
- FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG.
- the proximal end of the supported portion 228 enters the recess 246.
- the side surface of the supported portion 228 contacts the edge of the recess 246.
- the recess 246 is located above the second sprocket 146. As shown in FIG. 4, the recess 246 is located slightly behind the rotation center of the second sprocket 146 when viewed from above. In other words, the recess 246 is located near the rotation center of the second sprocket 146 when viewed from above. The recess 246 opens downward.
- the recess 246 opens in the inner side surface 129 of the cylinder head 128 as shown in FIGS. 4 and 8.
- the inner surface 247 of the recess 246 forms the inner side surface 129 of the cylinder head 128, that is, the inner peripheral surface 211 of the chain chamber 210.
- the recess 246 is formed in the cylinder head body 214 and the head cover 216 across the overlapping portion of the cylinder head body 214 and the head cover 216.
- the recess 246 can be easily formed as compared with the case where the recess 246 is formed in either the cylinder head body 214 or the head cover 216.
- the recess 246 may be formed only in the cylinder head body 214 or may be formed only in the head cover 216.
- the edge of the recess 246 with which the supported portion 228 contacts is formed in the wall 218 b of the cylinder head body 214.
- the recess 246 includes an opposing surface 248 on the head cover 216 side.
- the facing surface 248 faces the supported portion 228 which has entered the recess 246.
- the facing surface 248 faces the supported portion 228 in the direction in which the supported portion 228 moves in the recess 246.
- the supported portion 228 moves forward and obliquely upward in the recess 248.
- the opposing surface 248 extends in a direction substantially orthogonal to the direction in which the supported portion 228 moves in the recess 246. Thereby, the supported portion 228 in contact with the facing surface 248 can be prevented from moving from the position and coming out of the recess 246.
- the facing surface 248 does not have to extend in a direction substantially orthogonal to the direction in which the supported portion 228 moves in the recess 246.
- an opposing surface 248 extending in a direction orthogonal to the front-rear direction may be employed.
- the recessed part 246 is provided with the bottom face 250 in the cylinder head main body 214 side, as shown to FIG. 8 and FIG.
- the bottom surface 250 is formed at a position away from the supported portion 228 which has entered the recess 246. Thereby, the supported portion 228 which has entered the recess 246 is capable of contacting the opposing surface 248 without contacting the bottom surface 250.
- the recess 246 includes a side surface 252 on the cylinder head body 214 side.
- the side surface 252 is located closer to the second sprocket 146 than the bottom surface 250.
- the side surface 252 is located closer to the cylinder body 126 than the bottom surface 250.
- the side surface 252 extends in a direction orthogonal to the front-rear direction.
- the bottom surface 250 is located on one end side of the side surface 252 (the side away from the second sprocket 146). At the other end side of the side surface 252 (side approaching the second sprocket 146), the edge on the cylinder head main body 214 side of the recess 246 is located.
- the recess 246 includes a pair of side surfaces 254, 254.
- the pair of side surfaces 254, 254 oppose each other in the axial direction of the camshaft 142.
- Each side surface 254 extends in a direction perpendicular to the axial direction of the camshaft 142.
- Each side surface 254 is formed at a position away from the supported portion 228 which has entered the recess 246.
- the supported portion 228 contacts the edge of the recess 246 on the cylinder head main body 214 side in a state where the base end portion is in the recess 246. That is, the supported portion 228 contacts the wall 218 b of the cylinder head body 214.
- the wall 218 b of the cylinder head body 214 functions as a support
- the inner side surface 219 of the wall 218 b functions as a support.
- a gap is formed between the supported portion 228 and the bottom surface 250 in a state in which the supported portion 228 is in the recess 246.
- a gap is also formed between the supported portion 228 and each side surface 254. That is, the supported portion 228 is separated from the inner surface 247 of the recess 246 in a state where the supported portion 228 enters the recess 246.
- a wall 218b having an inner side surface 219 functioning as a support surface is integrally formed with a pair of walls 218c and 218d opposed in the left-right direction, as shown in FIG.
- the inner side surface 219 is integrally provided with the pair of walls 218c and 218d.
- the crankshaft 56 rotates.
- the first sprocket 108 attached to the crankshaft 56 rotates.
- the power of the first sprocket 108 is transmitted to the second sprocket 146 via the cam chain 154.
- the camshaft 142 rotates with the rotation of the second sprocket 146.
- a plurality of valves are driven.
- the piston 86 is driven by the rotation of the crankshaft 56 at the same time as the plurality of valves are driven. In this way, the intake to the combustion chamber 114 is performed. Then, the fuel is supplied to the combustion chamber 114 from the fuel supply device.
- crankshaft 56 rotates, the air-fuel mixture is compressed and the air-fuel mixture is ignited.
- the combustion of the air-fuel mixture moves the piston head 116, and the crankshaft 56 rotates to drive the valve.
- the burnt gas is exhausted from the combustion chamber 114 to the outside of the combustion chamber 114 by the drive of the valve.
- the crankshaft 56 is rotated by power from a cell motor (not shown).
- the drive pulley 50 of the transmission 46 is rotated by the power.
- the power of the drive pulley 50 is transmitted to the driven pulley 52 via the V-belt 54.
- the clutch shoe 80 of the centrifugal clutch 48 contacts the clutch housing 78. Then, the power of the centrifugal clutch 48 is transmitted to the first output shaft 70.
- the power transmitted to the first output shaft 70 is transmitted to the second output shaft 180 by a gear (not shown), and the power is transmitted from the second output shaft 180 to the rear wheel 16.
- crankcase 84 is prepared.
- the cam chain 154 is wound around the first sprocket 108.
- the cylinder body 126 is attached to the crankcase 84. Attach the chain guide 156.
- the cylinder head body 214 is attached to the cylinder body 126.
- the cam chain 154 is wound around the second sprocket 146.
- the second sprocket 146 is attached to the camshaft 142.
- the head cover 216 is attached to the cylinder head body 214 with the seal rubber 220 interposed therebetween.
- a chain chamber 210 including the first space 110, the second space 138, and the third space 148 is formed.
- a cam chain 154 is disposed in the chain chamber 210.
- the tensioner 158 is inserted into the chain chamber 210 from the crankcase 84 side. Specifically, the tensioner 158 is inserted into the chain chamber 210 from the opening 187. The tensioner 158 is moved forward. The tensioner 158 is inserted in the chain chamber 210 above the cam chain 154.
- the main body portion 226 is located on the cam chain 154 side, and the plate spring 166 is located on the slide surface 244 side. The leaf spring 166 is separated from the slide surface 244.
- the main body portion 226 contacts the cam chain 154.
- the supported portion 228 moves from the crankcase 84 side to the cylinder head 128 side while in contact with the slide surface 244.
- the supported portion 228 enters the recess 246.
- the supported portion 228 contacts the opposing surface 248. This limits the entry of the supported portion 228 into the recess 246.
- the facing surface 248 functions as a restricting portion.
- the support hole 238 is positioned near the screw hole 243 in a state where the supported portion 228 enters the recess 246.
- the tensioner 158 is moved so that the support hole 238 and the screw hole 243 are aligned.
- the support shaft 240 is screwed to the crankcase 84. Thus, the tensioner 158 can swing around the support shaft 240.
- the tensioner 158 When the tensioner 158 is inserted into the chain chamber 210, the main body portion 226 contacts the cam chain 154, and the supported portion 228 contacts the slide surface 244. A reaction force from the cam chain 154 is exerted on the main body portion 226, and a reaction force from the slide surface 244 is exerted on the supported portion 228.
- a large resistance acts on the tensioner 158. It is necessary to insert the tensioner 158 into the chain chamber 210 against this resistance.
- the supported portion 228 needs to be moved into the cylinder head 128. Therefore, it is necessary to insert the tensioner 158 into the chain chamber 210 while holding the mounting portion 230 by hand. As a result, the support hole 238 is hidden by hand. Therefore, it is difficult to insert the tensioner 158 into the chain chamber 210 while aligning the support hole 238 with the screw hole 243.
- the cylinder portion 194 includes the wall 212c, and the cylinder head body 214 includes the wall 218c. Therefore, the supported portion 228 of the tensioner 158 inserted into the chain chamber 210 can not be seen visually.
- the supported portion 228 when the tensioner 158 is inserted into the chain chamber 210, the supported portion 228 enters the recess 246.
- the supported portion 228 which has entered the recess 246 does not contact the surface other than the facing surface 248. Therefore, when the supported portion 228 enters the recess 246, the resistance acting on the tensioner 158 is suddenly reduced.
- the support hole 238 is positioned near the screw hole 243 when the supported portion 228 is in the recess 246. Therefore, the operator may insert the tensioner 158 into the chain chamber 210 until the resistance acting on the tensioner 158 is suddenly reduced.
- the support hole 238 is positioned near the screw hole 243 when the supported portion 228 is in the recess 246.
- the tensioner 158 exerts a smaller resistance than the resistance that acts on the supported portion 228 entering the recess 246. Therefore, alignment between the support hole 238 and the screw hole 243 is facilitated. As a result, it becomes easy to arrange the tensioner 158 so as to be pivotable about the support shaft 240.
- the supported portion 228 When the force when the supported portion 228 enters the recess 246 is strong, the supported portion 228 contacts the opposing surface 248. This allows the operator to determine that the tensioner 158 can not be inserted any more. Even when the supported portion 228 is in contact with the facing surface 248, the support hole 238 is positioned near the screw hole 243, as the supported portion 228 does not change into the recess 246. Therefore, alignment between the support hole 238 and the screw hole 243 is facilitated.
- the tensioner 158 may be the only member for applying tension to the cam chain 154. Therefore, the number of parts is reduced.
- the support portion is integrally formed with the cylinder head 128. In this case, the strength of the support portion can be easily secured.
- the support portion includes a support surface with which the supported portion 228 contacts, and a pair of walls 218c and 218d provided to sandwich the tensioner 158, and the support surface and the pair of walls 218c and 218d are integrated. Are provided. In this case, the strength of the support surface can be easily secured.
- the wall 218b on which the support surface is formed may not be thicker than necessary.
- the pair of walls 218 c and 218 d are provided to overlap the tensioner 158 when viewed in the axial direction of the crankshaft 56, that is, in the left-right direction. In this case, the lateral movement of the tensioner 158 can be restricted.
- the cylinder head 128 is provided with a support portion, and the support surface is formed on the inner circumferential surface 211 forming the chain chamber 210.
- the support surface is formed on the inner circumferential surface 211 forming the chain chamber 210.
- one of the supported portion 228 and the support hole 238 is provided at one end of the tensioner 158, and the other is provided at the other end of the tensioner 158. In this case, the separation distance between the supported portion 228 and the support hole 238 is increased. Even if the external force acting on the plate spring 166 is small, the plate spring 166 is likely to be elastically deformed.
- a bolt 224 connecting the crankcase 84, the cylinder body 126 and the cylinder head 128 is further provided.
- the bolt 224 has a thermal expansion coefficient smaller than that of the crankcase 84, the cylinder body 126 and the cylinder head 128.
- a screw hole 243 in which the support shaft 240 is fixed is provided in the crankcase 84.
- the inner side surface 219 is formed in the cylinder head body 214. If the positions of the crankcase 84 and the cylinder head body 214 shift, it is possible that the target tension can not be applied to the cam chain 154. In particular, during operation of the engine 44, the entire engine 44 becomes hot.
- crankcase 84 and the cylinder head body 214 thermally expand, and the possibility that the positions of these members shift may be high. Since the bolt 224 having a thermal expansion coefficient smaller than that of the crankcase 84, the cylinder body 126 and the cylinder head 128 is employed, the influence of the thermal expansion can be suppressed.
- the inner circumferential surface 211 of the chain chamber 210 is formed with a restricting portion that restricts the movement of the tensioner 158 in the insertion direction when the tensioner 158 is inserted into the chain chamber 210 and assembled.
- the tensioner 158 contacts the regulating portion. Therefore, the operator can determine that the tensioner 158 can not be inserted any more. Even when the end of the tensioner 158 inserted into the chain chamber 210 is not visible, it can be determined how long the tensioner 158 should be inserted into the chain chamber 210.
- the inner circumferential surface 129 of the cylinder head 128 has a recess 246, and the inner surface 247 of the recess 246 functions as a restricting portion.
- the tensioner 158 enters the recess 246, the resistance acting on the tensioner 158 is suddenly reduced. Even when the end of the tensioner 158 inserted into the chain chamber 210 is not visible, it can be determined how long the tensioner 158 should be inserted into the chain chamber 210.
- the recess 246 includes an opposing surface 248 that faces the end of the tensioner 158 in the direction in which the tensioner 158 enters the recess 246, and the opposing surface 248 functions as a restricting portion.
- the restricting portion can be easily formed.
- the cylinder head 128 includes the cylinder head body 214 and the head cover 216 attached to the cylinder head body 214 and forming a third space with the cylinder head body 214, and the restriction portion is formed on the head cover 216. It is done. In this case, the restricting portion can be easily formed.
- the motorcycle 10 according to the present embodiment includes the above-described engine 44. Therefore, the number of members required to apply tension to the cam chain 154 can be reduced. Further, when the tensioner 158 is inserted into the chain chamber 210, it can be easily understood how long the tensioner 158 should be inserted into the chain chamber 210.
- FIG. 10 is a cross-sectional view of a part of the chain chamber 210 as viewed from the left side.
- the contact of the tensioner 158 is not limited to the inner surface of the recess 246.
- the head cover 216 may be provided with a projection 256 so that the tensioner comes in contact with the projection 256.
- the protrusion 256 protrudes from the inner surface of the head cover 216 to the cylinder head main body 214 side.
- the protrusions 256 extend along the inner surface of the head cover 216.
- the protrusion 256 extends from the edge of the recess 246 on the head cover 216 side into the recess 246.
- the supported portion 228 having entered the recess 246 comes in contact with the projection 256. This limits the entry of the supported portion 228 into the recess 246.
- the protrusion 256 functions as a restricting portion.
- the restricting portion is a protrusion 256 which protrudes from the inner surface of the head cover 216 toward the cylinder head main body 214.
- the protruding height of the projection 256 by adjusting the protruding height of the projection 256, the amount of the tension applying member entering the recess 246 can be adjusted.
- FIG. 11 is a partial sectional view of the chain chamber 210 as viewed from the left side.
- the cylinder head 128 does not have to be composed of the cylinder head body 214 and the head cover 216.
- it may be a cylinder head in which a cylinder head body and a head cover are integrally formed.
- the cylinder 88 explained one motorcycle 10 as an example, not only this but the present invention is applicable also to a motorcycle provided with a plurality of cylinders.
- the motorcycle 142 has been described by way of example with one camshaft 142.
- the present invention is not limited to this and can be applied to a motorcycle using two camshafts.
- the present invention is not limited to this, and may be applied to a three- or four-wheeled leaning vehicle or the like.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
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Abstract
Description
以下、図面を参照し、本発明の第1の実施形態に係る自動二輪車10について説明する。本実施形態では、自動二輪車10として、スクーター型式の自動二輪車を例に説明する。図中同一又は相当部分には同一符号を付してその部材についての説明は繰り返さない。
図1は、本発明の第1の実施の形態に係る自動二輪車10の左側面図である。なお、以下の説明において前後左右と方向を示す場合、自動二輪車10のシート22に着座した乗員から見た前後左右の方向を意味するものとする。図中矢印Fは、自動二輪車10の前方向を、矢印Uは、自動二輪車10の上方向を示す。
次に、主に図2を参照して、エンジン44の構成について詳細に説明する。
エンジン44を組み立てる際やメンテナンスを行う際に、カムチェーン154を取り付ける動作について、図4を参照しながら、説明する。
図10を参照しながら、本発明の第2の実施形態について説明する。図10は、チェーン室210の一部を左側から見た断面図である。
図11を参照しながら、本発明の第3の実施形態について説明する。図11は、チェーン室210を左側から見た一部断面図である。
Claims (14)
- チェーン室を有するエンジンであって、
クランクシャフトと、
カムシャフトと、
前記クランクシャフトに取り付けられた第1のスプロケットと、
前記カムシャフトに取り付けられた第2のスプロケットと、
前記第1のスプロケットを収容するクランクケースと、
前記クランクケースに取り付けられるシリンダボディと、
前記シリンダボディに取り付けられ、前記第2のスプロケットを収容するシリンダヘッドと、
前記第1のスプロケット及び前記第2のスプロケットに巻き掛けられるチェーンと、
前記チェーンに張力を与える張力付与部材とを備え、
前記クランクケース、前記シリンダボディ及び前記シリンダヘッドによって、前記チェーン及び前記張力付与部材を収容する前記チェーン室が形成され、
前記張力付与部材は、
板バネ部材と、
前記板バネ部材を支持し、前記チェーン室内で前記チェーンに接触する接触部材とを含み、
前記エンジンは、さらに、
前記接触部材に形成された支持孔に挿し通され、前記張力付与部材を揺動可能に支持する支持軸と、
前記接触部材に形成された被支持部と接触することで前記張力付与部材を支持する支持部とを備え、
前記支持部は、前記張力付与部材が前記支持軸を中心に揺動する際、前記被支持部が前記チェーン室内でスライドできるように前記被支持部を支持する、エンジン。 - 請求項1に記載のエンジンであって、
前記支持部は、前記シリンダボディまたは前記シリンダヘッドの何れかと一体形成されている、エンジン。 - 請求項1又は2に記載のエンジンであって、
前記支持部は、
前記被支持部が接触する支持面と、
前記張力付与部材を挟むように設けられる一対の壁とを含み、
前記支持面と前記一対の壁とが一体的に設けられている、エンジン。 - 請求項3に記載のエンジンであって、
前記一対の壁は、前記クランクシャフトの軸方向から見たときに、前記張力付与部材と重なるように設けられる、エンジン。 - 請求項3又は4に記載のエンジンであって、
前記シリンダヘッド及び前記シリンダボディの何れかに前記支持部が設けられ、
前記支持面は、前記チェーン室を形成する内周面に形成されている、エンジン。 - 請求項1~5の何れか1項に記載のエンジンであって、
前記被支持部及び前記支持孔の何れか一方が前記張力付与部材の一端に設けられ、他方が前記張力付与部材の他端に設けられる、エンジン。 - 請求項1~6の何れか1項に記載のエンジンであって、
前記クランクケース、前記シリンダボディ及び前記シリンダヘッドを連結するボルトをさらに備え、
前記ボルトは、前記クランクケース、前記シリンダボディ及び前記シリンダヘッドよりも熱膨張率が小さい、エンジン。 - 請求項5に記載のエンジンであって、
前記内周面には、前記張力付与部材を前記チェーン室に挿入して組み付けるときに、前記張力付与部材の挿入方向への移動を制限する規制部が形成されている、エンジン。 - 請求項8に記載のエンジンであって、
前記シリンダヘッド及び前記シリンダボディの前記内周面は凹部を有し、前記凹部の内面が前記規制部として機能する、エンジン。 - 請求項9に記載のエンジンであって、
前記凹部は、前記張力付与部材が前記凹部に入り込む方向において、前記張力付与部材の端部と対向する対向面を含み、
前記対向面が前記規制部として機能する、エンジン。 - 請求項8~10の何れか1項に記載のエンジンであって、
前記シリンダヘッドは、
シリンダヘッド本体と、
前記シリンダヘッド本体に取り付けられ、前記シリンダヘッド本体とともに、前記第3の空間を形成するヘッドカバーとを含み、
前記規制部が前記ヘッドカバーに形成されている、エンジン。 - 請求項11に記載のエンジンであって、
前記規制部が、前記ヘッドカバーの内面から前記シリンダヘッド本体側に突出する突起である、エンジン。 - 請求項1~12の何れか1項に記載のエンジンであって、
前記シリンダボディは、前記チェーン室の一部を形成する筒部を有する、エンジン。 - 請求項1~13の何れか1項に記載のエンジンを備えた鞍乗型車両。
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CN201280001792.3A CN102959277B (zh) | 2011-05-20 | 2012-05-08 | 发动机和骑乘型车辆 |
EP12790318.5A EP2574825B1 (en) | 2011-05-20 | 2012-05-08 | Engine and saddle-type vehicle |
BR112012033053-5A BR112012033053B1 (pt) | 2011-05-20 | 2012-05-08 | motor possuindo uma câmara de corrente e veículo do tipo de montar |
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JP2011-114077 | 2011-05-20 | ||
JP2011114077A JP2014156869A (ja) | 2011-05-20 | 2011-05-20 | エンジン及び鞍乗型車両 |
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EP (1) | EP2574825B1 (ja) |
JP (1) | JP2014156869A (ja) |
CN (1) | CN102959277B (ja) |
BR (1) | BR112012033053B1 (ja) |
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JP2009228673A (ja) | 2008-02-29 | 2009-10-08 | Honda Motor Co Ltd | カムチェーンテンショナを備えたエンジン |
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JPS5612007A (en) * | 1979-07-09 | 1981-02-05 | Yamaha Motor Co Ltd | Engine camchain tensioner |
JPS6032501U (ja) * | 1983-08-10 | 1985-03-05 | 川崎重工業株式会社 | エンジンのカムチエン装置 |
JPS61138803U (ja) * | 1985-02-20 | 1986-08-28 | ||
JPH0624600Y2 (ja) * | 1985-09-17 | 1994-06-29 | スズキ株式会社 | 四サイクルエンジンのカムチエンガイド |
JPH079171B2 (ja) * | 1987-03-30 | 1995-02-01 | スズキ株式会社 | 4サイクルエンジンのブリ−ザ装置 |
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JP4084480B2 (ja) * | 1998-12-07 | 2008-04-30 | 本田技研工業株式会社 | 車両用v型内燃機関 |
JP4104407B2 (ja) * | 2002-09-26 | 2008-06-18 | 本田技研工業株式会社 | 4サイクルエンジンの給油装置 |
JP2004114861A (ja) * | 2002-09-26 | 2004-04-15 | Honda Motor Co Ltd | 二輪車用車輪 |
JP4056454B2 (ja) * | 2003-10-10 | 2008-03-05 | 本田技研工業株式会社 | テンショナ装置 |
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2011
- 2011-05-20 JP JP2011114077A patent/JP2014156869A/ja not_active Withdrawn
-
2012
- 2012-05-08 CN CN201280001792.3A patent/CN102959277B/zh not_active Expired - Fee Related
- 2012-05-08 WO PCT/JP2012/061762 patent/WO2012160959A1/ja active Application Filing
- 2012-05-08 BR BR112012033053-5A patent/BR112012033053B1/pt not_active IP Right Cessation
- 2012-05-08 MY MYPI2012701273A patent/MY165717A/en unknown
- 2012-05-08 EP EP12790318.5A patent/EP2574825B1/en not_active Not-in-force
- 2012-05-18 TW TW101117909A patent/TWI465659B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09195845A (ja) * | 1996-01-12 | 1997-07-29 | Honda Motor Co Ltd | 往復型内燃機関 |
JP2001153192A (ja) * | 1999-11-24 | 2001-06-08 | Honda Motor Co Ltd | テンショナ装置 |
JP2009228673A (ja) | 2008-02-29 | 2009-10-08 | Honda Motor Co Ltd | カムチェーンテンショナを備えたエンジン |
Non-Patent Citations (1)
Title |
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See also references of EP2574825A4 * |
Also Published As
Publication number | Publication date |
---|---|
TWI465659B (zh) | 2014-12-21 |
EP2574825A4 (en) | 2014-03-12 |
MY165717A (en) | 2018-04-20 |
BR112012033053A2 (pt) | 2018-01-23 |
JP2014156869A (ja) | 2014-08-28 |
CN102959277A (zh) | 2013-03-06 |
CN102959277B (zh) | 2015-09-02 |
EP2574825B1 (en) | 2017-07-05 |
EP2574825A1 (en) | 2013-04-03 |
TW201303188A (zh) | 2013-01-16 |
BR112012033053B1 (pt) | 2021-06-08 |
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