WO2020066877A1 - Power unit for straddle-type vehicles - Google Patents
Power unit for straddle-type vehicles Download PDFInfo
- Publication number
- WO2020066877A1 WO2020066877A1 PCT/JP2019/036922 JP2019036922W WO2020066877A1 WO 2020066877 A1 WO2020066877 A1 WO 2020066877A1 JP 2019036922 W JP2019036922 W JP 2019036922W WO 2020066877 A1 WO2020066877 A1 WO 2020066877A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power unit
- rotation axis
- rotating body
- saddle
- type vehicle
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J99/00—Subject matter not provided for in other groups of this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
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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
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
Definitions
- the present invention provides a crankcase that rotatably supports a crankshaft, a rotating body that is provided on the crankshaft outside the crankcase, and that rotates around a rotation axis of the crankshaft, and a rotating shaft that is coupled to the crankcase.
- the present invention relates to a power unit for a saddle-ride type vehicle including a rotating body cover surrounding the rotating body and forming a housing space for the rotating body.
- Patent Document 1 discloses an ACG (alternating current generator) starter that generates power according to rotation of a crankshaft and causes rotation of the crankshaft according to supply of electric current.
- the ACG starter includes a rotor (rotating body) fixed to the crankshaft outside the crankcase and surrounding the stator around the rotation axis.
- An ACG cover (rotating body cover) that surrounds the rotor around the rotation axis and forms a housing space for the rotor is coupled to the crankcase.
- the crankcase has an annular wall that receives the ACG cover and partially surrounds the rotor of the ACG starter.
- a notch is formed in the annular wall at the front and the upper side. Since the outside air linearly flows from the notch toward the rotor of the ACG starter, the rotor is efficiently cooled, but foreign matters easily enter the housing space while being mixed with the outside air.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power unit of a saddle-ride type vehicle capable of suppressing the flow of foreign matter into a housing space of a cover coupled to a crankcase. .
- a crankcase rotatably supporting a crankshaft, a rotating body provided on the crankshaft outside the crankcase, and rotating around a rotation axis of the crankshaft,
- a rotating body cover that is coupled to the crankcase and surrounds the rotating body around the rotation axis to form a housing space for the rotating body.
- a peripheral wall surrounding the housing space around the rotation axis outside the rotating body is provided, and the peripheral wall is provided with a wind guide port for introducing outside air in a radial direction.
- the rotating body cover is formed in a cylindrical shape that draws a circle coaxially with the rotation axis, and the air guide port is located below a horizontal plane including the rotation axis. Placed on the side.
- the rotating body cover has a wall body that is continuous over the entire circumference around the rotation axis.
- the rotator cover further includes a rectifying plate disposed at the air guide port and extending radially with respect to the rotation axis. It is formed.
- the rectifying plates are arranged at equal intervals around the rotation axis.
- the rotating body cover is made of resin.
- the rotating body cover is coupled to the first body surrounding the rotating body around the rotation axis, and to the first body. And a second body having the peripheral wall, wherein the first body is formed with a mesh-like partition for partitioning a space surrounded by the first body from a space surrounded by the peripheral wall.
- a projection is formed on the body and protrudes toward the partition above a horizontal plane including the rotation axis.
- the outside air flows radially into the housing space from the air guide port of the rotating body cover, and proceeds toward the rotating body in the axial direction of the rotation axis. Since the flow path of the outside air is non-linear, the flow of foreign matter toward the rotating body can be suppressed.
- the air guide opening is opened downward from the horizontal direction, the upward air guide opening is eliminated, and the emission of the intake sound toward the occupant can be prevented.
- the wall body is continuous over the entire circumference, the strength of the rotating body cover with respect to the load in the axial direction of the rotation axis increases, and the opening area of the air guide port increases with the strength.
- the outside air can be rectified by the rectifying plate and introduced radially.
- the introduction of outside air can be rectified well.
- the outside air can flow in toward the rotation axis.
- the rotating body cover is made of resin, it does not easily become hot.
- the weight can be reduced as compared with metal.
- the mesh-shaped partition is blocked by foreign matters such as fallen leaves. Can be prevented.
- FIG. 1 is a side view schematically showing an overall image of a motorcycle (saddle-ride type vehicle) according to one embodiment of the present invention.
- FIG. 2 is a front view of the motorcycle.
- FIG. 3 is a cross-sectional view of the power unit observed on a cutting plane including the cylinder axis, the rotation axis of the crankshaft, the axis of the main shaft, and the axis of the counter shaft.
- FIG. 4 is an enlarged left side view of the power unit.
- FIG. 5 is an enlarged vertical sectional view taken along line 5-5 in FIG. (First Embodiment) FIG.
- FIG. 6 is an enlarged left side view of the power unit observed when the outer member is removed from the inner member.
- FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG.
- FIG. 8 is an enlarged left side view of the power unit observed when an AC generator (ACG) cover is removed.
- FIG. 9 is an enlarged perspective view schematically showing an entire image of the inner member of the ACG cover from a diagonally upper viewpoint.
- FIG. 1 schematically shows an overall image of a motorcycle which is a saddle-ride type vehicle according to an embodiment of the present invention.
- the motorcycle 11 includes a body frame 12 and a body cover 13 attached to the body frame 12.
- the vehicle body cover 13 has a tank cover 16 that covers the fuel tank 14 and is connected to an occupant seat 15 behind the fuel tank 14. Fuel is stored in the fuel tank 14. The occupant straddles the occupant seat 15 when driving the motorcycle 11.
- a tandem occupant hereinafter referred to as a “tandem occupant” can be seated on the occupant seat 15.
- the vehicle body frame 12 includes a head pipe 17, a main frame 19 extending rearward and downward from the head pipe 17 and having a pivot frame 18 at a rear lower end, and a down frame extending downward from the head pipe 19 at a position below the main frame 19. 21, left and right seat frames 22 extending rearward in the horizontal direction from a curved area 19 a of the main frame 19, extending rearward upward from the pivot frame 18 below the seat frames 22, and coupled to the seat frames 22 from below at rear ends. And a rear frame 23.
- the rear frame 23 supports the seat frame 22 from below.
- a front fork 24 is supported on the head pipe 14 so as to be steerable.
- a front wheel WF is supported by the front fork 24 so as to be rotatable around an axle 25.
- a steering handle 26 is connected to an upper end of the front fork 24. As shown in FIG. 2, the steering handle 26 extends left and right in the vehicle width direction in parallel with the ground. Handle grips 27 are fixed to both ends of the steering handle 26. The driver grips the handle grips 27 with the left and right hands when driving the motorcycle 11.
- a swing arm 29 is connected to the body frame 12 behind the vehicle so as to swing up and down around a pivot 28.
- a rear wheel WR is supported at the rear end of the swing arm 29 so as to be rotatable around the axle 31.
- a power unit 32 that generates a driving force transmitted to the rear wheel WR is mounted on the body frame 12 between the front wheel WF and the rear wheel WR. The power of the power unit 32 is transmitted to the rear wheel WR via the power transmission device 33.
- the motorcycle 11 is provided with a pair of steps 34 disposed on the left and right sides of the power unit 32 in front of the pivot frame 18, and is disposed behind the step 34 and disposed on the left and right sides of the rear wheel WR in front of the axle 31. And a pair of tandem steps 35 performed.
- the steps 34 are fixed to both ends of a rod 36 attached to the engine 32 from below and extending in the vehicle width direction.
- the tandem steps 35 extend rearward from the pivots 28, bend upward on the sides of the rear wheel WR, and are fixed to brackets 37 connected to the rear frame 23 at the upper ends, respectively.
- the driver can put his foot on step 34 while straddling the occupant seat 15.
- the tandem occupant can rest his foot on the tandem step 35 over the occupant seat 15 behind the driver.
- the power unit 32 is disposed between the down frame 21 and the main frame 19, and is connected to the down frame 21 and the main frame 19, respectively, and a cylinder extending upward from the front side of the crank case 38 and tilting forward.
- a cylinder block 39 having an axis C, a cylinder head 41 coupled to an upper end of the cylinder block 39 to support a valve operating mechanism, and coupled to an upper end of the cylinder head 41 to cover the valve operating mechanism on the cylinder head 41.
- a head cover 42 a head cover 42.
- the crankcase 38 is formed with two upper and lower engine hangers 43a projecting forward from the front side and two upper and lower engine hangers 43b and 43c projecting rearward from the rear side.
- the front engine hanger 43a is connected to the down frame 21 by a connector 44a such as a bolt and nut.
- the rear engine hangers 43b and 43c are connected to the pivot frame 18 by connecting members 44b and 44c such as bolts and nuts.
- power is generated around the rotation axis Rx.
- a left case cover 45 that accommodates an alternating current generator (ACG) starter and a sprocket, which will be described later, is coupled to the crankcase 38.
- ACG alternating current generator
- the cylinder block 39 defines a cylinder 48 for guiding the linear reciprocating motion of the piston 47 along the cylinder axis C.
- a single cylinder 48 that receives a single piston 47 is formed in the cylinder block 39.
- a combustion chamber 49 is defined between the piston 47 and the cylinder head 41.
- a spark plug 51 facing the combustion chamber 49 is attached to the cylinder head 41.
- the air-fuel mixture is introduced into the combustion chamber 49 by the action of an intake valve and an exhaust valve that open and close according to the rotation of the camshaft 52, and the exhaust gas after combustion is exhausted from the combustion chamber 49.
- the crankcase 38 is divided into a first case half 38a and a second case half 38b.
- the first case half 38a and the second case half 38b face each other on their inner surfaces.
- the first case half 38a and the second case half 38b are connected to each other in a liquid-tight manner at the mating surfaces to cooperate to define the crank chamber 53.
- the left case cover 45 is coupled to an outer surface of the first case half 38a, and an ACG cover (rotating body cover) 55 for accommodating the ACG starter 54 between the first case half 38a and the first case half.
- a sprocket cover 57 for receiving the sprocket 56 between the first case half 38a and the outer case 38a.
- the ACG cover 55 and the sprocket cover 57 are disposed inside a virtual plane VP that connects the tip of the step 34, the tip of the handle grip 27, and the ground point of the front wheel WF when inverted.
- a clutch cover 59 for accommodating a friction clutch 58 described later is coupled between the outer surface of the second case half body 38b and the second case half body 38b.
- the crankshaft 61 is arranged between journals 64a, 64b connected to ball bearings 62, 63 fitted into the first case half 38a and the second case half 38b, respectively, and the journals 64a, 64b. And a crank 65 housed in the crank 53.
- the crank 65 has a crank web 66 integrated with the journals 64a and 64b, and a crank pin 67 connecting the crank webs 66 to each other.
- the axes of the journals 64a, 64b coincide with the rotation axis Rx.
- a large end of a connecting rod 68 extending from the piston 47 is rotatably connected to the crank pin 67.
- the connecting rod 68 converts a linear reciprocating motion of the piston 47 into a rotary motion of the crankshaft 61.
- An ACG starter 54 is connected to one end of a crankshaft 61 projecting outward from the crankcase 38 in one direction.
- the ACG starter 54 includes a stator 71 fixed to the outer surface of the crankcase 38, and a rotor (rotating body) 72 that is non-rotatably coupled to one end of the crankshaft 61 protruding from the crankcase 38.
- the stator 71 has a plurality of coils 71a arranged in a circumferential direction around the crankshaft 61 and wound around a stator core.
- the rotor 72 has a plurality of magnets 72a arranged in a circumferential direction along an annular orbit surrounding the stator 71.
- the magnet 72a When the crankshaft 61 rotates, the magnet 72a is displaced relative to the coil 71a, and the ACG starter 54 generates power. Conversely, when a current flows through the coil 71a, a magnetic field is generated in the coil 71a, causing rotation of the crankshaft 61.
- the rotor 72 is provided with a blade 72b that draws air in the axial direction during rotation and generates an airflow in the accommodation space in the centrifugal direction.
- the power unit 32 includes a dog clutch type transmission 73 combined with the crankshaft 61.
- the transmission 73 is accommodated in a transmission room 74 that is continuously partitioned from the crankcase 53 in the crankcase 38.
- the transmission 73 includes a main shaft 75 having an axis parallel to the axis of the crankshaft 61 and a counter shaft (output shaft) 76.
- the main shaft 75 and the counter shaft 76 are rotatably supported by the crankcase 38 by rolling bearings.
- a plurality of transmission gears 77 are supported on the main shaft 75 and the counter shaft 76.
- the transmission gear 77 is disposed between the rolling bearings and housed in the transmission room 74.
- the transmission gear 77 includes a rotating gear 77a coaxially and rotatably supported on the main shaft 75 or the counter shaft 76, and a fixed gear 77b fixed to the main shaft 75 so as to be relatively non-rotatable and meshing with the corresponding rotating gear 77a.
- a shift gear 77c supported by the main shaft 75 or the counter shaft 76 so as to be relatively non-rotatable and axially displaceable and mesh with the corresponding rotary gear 77a.
- the axial displacement of the rotating gear 77a and the fixed gear 77b is restricted.
- the shift gear 77c is connected to the rotary gear 77a through the axial displacement, the relative rotation between the rotary gear 77a and the main shaft 75 or the counter shaft 76 is restricted.
- the shift gear 77c meshes with the fixed gear 77b of the other shaft, rotational power is transmitted between the main shaft 75 and the counter shaft 76.
- the shift gear 77c is connected to the rotating gear 77a that meshes with the fixed gear 77b of the other shaft, rotational power is transmitted between the main shaft 75 and the counter shaft 76.
- the counter shaft 76 outputs the torque of the crank shaft 61 at an arbitrary reduction ratio via the transmission 73.
- the main shaft 75 is connected to the crankshaft 61 through a primary reduction mechanism 78 housed between the crankcase 38 and the clutch cover 59 outside the crankcase 38.
- the primary reduction mechanism 78 includes a power transmission gear 78a and a driven gear 78b supported on the main shaft 75 so as to be relatively rotatable.
- the power transmission gear 78a is fixed to the other end of the crankshaft 61 projecting outward from the crankcase 38.
- the driven gear 78b meshes with the power transmission gear 78a.
- the friction clutch 58 housed between the crankcase 38 and the clutch cover 52 is connected to the main shaft 75.
- the friction clutch 58 includes a clutch outer 58a and a clutch hub 58b.
- the driven gear 78b of the primary reduction mechanism 78 is connected to the clutch outer 58a.
- connection and disconnection are switched between the clutch outer 58a and the clutch hub 58b according to the operation of the clutch lever.
- the sprocket 56 is fixed to the counter shaft 76.
- the power transmission device 33 includes a sprocket 56, a driven sprocket fixed to the axle 31 of the rear wheel WR, and a winding chain 79 wound around the sprocket 56 and the driven sprocket.
- the sprocket 56 transmits the rotational force of the counter shaft 76 to the rear wheel WR via the wrapping chain 79.
- the ACG cover 55 accommodates the inner peripheral wall 81a surrounding the rotor 72 of the ACG starter 54 around the rotation axis Rx, and the ACG starter 54 around the rotation axis Rx outside the rotor 72 of the ACG starter 54 in the axial direction of the rotation axis Rx.
- an outer peripheral wall 81b surrounding the space.
- the inner peripheral wall 81a and the outer peripheral wall 81b are formed in a cylindrical shape that draws a circle coaxially with the rotation axis Rx.
- the outer peripheral wall 81b has a wall 82 that is continuous over the entire circumference around the rotation axis Rx.
- the ACG cover 55 is provided with a mounting boss 84 that is disposed radially outside the inner peripheral wall 81a, overlaps the outer surface of the crankcase 38, and is fastened to the crankcase 38 with bolts 83.
- the ACG cover 55 is connected to the sprocket cover 57 by a box-shaped expansion body 85 extending rearward from the inner peripheral wall 81a.
- a recess 87 is formed in the sprocket cover 57 at a position above and below the sprocket 56 for accommodating a screw 86 for fastening the sprocket cover 57 to the crankcase 38.
- the bottom plate of the recess 87 is placed on the outer surface of the crankcase 38 and receives the head of a screw 86 screwed into the crankcase 38.
- the outer peripheral wall 81b is provided with a wind guide port 87 for introducing outside air in the radial direction.
- the air guide port 87 is disposed below the horizontal plane HP including the rotation axis Rx.
- a rectifying plate 88a that is arranged at the air guide opening 87 and extends radially with respect to the rotation axis Rx is formed.
- the current plates 88a are arranged at equal intervals around the rotation axis Rx.
- the ACG cover 55 has an attachment boss 84 (see FIG. 4), is fixed to the crankcase 38, and has an inner member (first body) 55a forming an inner peripheral wall 81a; An outer member (second body) 55b having an outer peripheral wall 81b coupled to the outer member 55b; The outer member 55b covers the inner member 55a outside the rotor 72 in the axial direction of the rotation axis Rx.
- a mesh-like partition 89 is formed on the inner member 55a to separate the space surrounded by the inner member 55a from the space surrounded by the outer peripheral wall 81b.
- the partition 89 draws a linear body 89 a extending radially from the outer edge of the opening 91 having a circular contour toward the rotation axis Rx, and a circle concentrically with the circular shape of the opening 91.
- a circular body 89b that connects the first and second parts 89a.
- the size of the mesh may be set to, for example, about 1.5 to 3.0 cm square.
- a plurality of projections 92 are formed on the inner surface of the outer member 55b and project toward the partition 89 above a horizontal plane HP including the rotation axis Rx.
- the protrusion 92 is formed of, for example, a rod having an axis parallel to the rotation axis Rx.
- the protrusions 92 are arranged, for example, along an arc drawn concentrically with the rotation axis Rx.
- the inner member 55a is formed of a material having higher rigidity than the outer member 55b.
- both the inner member 55a and the outer member 55b are molded from a resin material.
- the inner member 55a is molded from, for example, polyamide 66 (PA66 resin).
- the outer member 55b is molded from, for example, polypropylene (PP resin).
- the inner member 55a is surrounded by the wall body 82 of the outer peripheral wall 55b, and has a connection end 93 that is reduced in the radial direction toward the distal end.
- the connection end 93 has a first wall 93a radially contracting toward the front end facing the outer peripheral wall 81b, a second wall 93b extending from the front end of the first wall 93a toward the rotation axis Rx, and a second wall 93b.
- a third wall 93c extending toward the crankcase 38 from the inside and forming a space with the first wall 93a.
- An opening 91 is defined inside the third wall 93c.
- the inner peripheral wall 81a, the first wall 93a, the second wall 93b, and the third wall 93c are continuous with a uniform wall thickness.
- one or more engagement mechanisms 94 that engage with each other are arranged between the connection end 93 and the outer member 55b.
- the engagement mechanism 94 is formed at the connection end 93 and extends in the radial direction with two grooves 94 a, and is formed in the outer member 55 b. And two entering plate pieces 94b.
- the grooves 94a are arranged at intervals of less than 120 degrees around the rotation axis Rx.
- the grooves 94a may be arranged at intervals other than equal intervals in the circumferential direction, for example.
- the grooves 94a are arranged at intervals other than equal intervals, the correspondence between the grooves 94a and the plate pieces 94b is reliably determined, so that the outer member 55b is erroneously attached to the inner member 55a at a prescribed angular position around the rotation axis Rx. Can be stacked.
- a groove may be formed in the outer member 55b and a plate piece may be formed in the inner member 55a.
- a boss 96 into which a screw 95 that passes through the inner member 55a from the inside of the inner member 55a is formed on the outer member 55b.
- the boss 96 enters the recess 93d defined by the connection end 93 from the outside in the axial direction, and is received at the tip by the bottom plate of the recess 93d.
- the screw 95 fastens the boss 96 to the bottom plate of the recess 93d.
- the screw 95 has an axis parallel to the rotation axis Rx.
- the bosses 96 are arranged at equal intervals of 120 degrees around the rotation axis Rx.
- a gap is formed between the edge (end face) of the wall 82 and the inner member 55a.
- the head of the screw 95 faces the surface 72c of the rotor 72 that is continuous around the rotation axis Rx outside the cylindrical surface circumscribing the blade 72b.
- the blade 72b is formed as a member having a smaller diameter than the surface 72c and fastened to the rotor 72 in a recess inside the surface 72c.
- a partition wall 97 is formed which extends vertically between the space for accommodating the ACG starter 54 and the space covered by the sprocket cover 57 and separates them.
- An exhaust port 98 is formed at the lower end of the partition wall 97.
- the sprocket cover 57 defines an exhaust passage 99 extending from the exhaust port 98 at a predetermined length between the sprocket cover 57 and the outer surface of the crankcase 38.
- the sprocket cover 57 has a partition wall 101 that divides the exhaust passage 99 from a space that accommodates the sprocket 56.
- An exhaust passage 99 is defined between the partition wall 101 and the outer wall 102.
- the exhaust passage 99 extends downstream in the rotation direction of the rotor 54 along the tangential direction of the virtual cylindrical surface surrounding the rotor 54 coaxially with the rotor 54.
- the exhaust passage 99 extends rearward of the vehicle body at a position below the sprocket 56.
- the exhaust passage 99 is inclined so as to decrease toward the ground as it goes rearward of the vehicle body.
- the outlet 99a of the exhaust passage 99 faces a connecting member 44c fixed to the engine hanger 43c.
- the outer wall of the sprocket cover 57 facing the partition wall 101 is turned upward toward the partition wall 101. The turning back can prevent foreign matter from entering the exhaust passage 99 from below.
- the outer wall of the ACG cover 55 overlaps the outer wall of the sprocket cover 57 from above.
- the outlet 99 a of the exhaust passage 99 is disposed behind the step 34.
- the outlet 99a of the exhaust passage 99 is located at a position lower than the horizontal plane ZP circumscribing the tandem step 35 from below.
- the inner member 55a of the ACG cover 55 comes into contact with the crankcase 38 at a mating surface 103 formed by a plane orthogonal to the rotation axis Rx.
- the inner member 55 a has a water blocking wall 104 that protrudes from the outer periphery of the mating surface 103 and covers the outer surface of the crankcase 38.
- the water stop wall 104 is disposed forward and above the rotation axis Rx.
- the water stop wall 104 continues from the upper end of the partition wall 97 forward along the mating surface 103 and is interrupted at a position lower than the horizontal plane HP including the rotation axis Rx (see FIG. 6).
- the blades 72b generate airflow in the centrifugal direction according to the rotation of the rotor 72.
- the outside air flows into the accommodating space of the ACG starter 54 in a radial direction from the air guide port 87 of the outer member 55b along the second wall 93b of the connection end 93.
- the outside air advances toward the rotor 72 in the axial direction of the rotation axis Rx in the accommodation space. Since the flow path of the outside air is non-linear, the flow of foreign matter toward the rotor 72 can be suppressed.
- Outside air flows into the inner space of the inner member 55a from the opening 91. The outside air cools the ACG starter 54 in the accommodation space of the ACG starter 54.
- the ACG cover 55 is formed in a cylindrical shape that draws a circle coaxially with the rotation axis Rx.
- the air guide opening 88 is arrange
- the outer member 55b of the ACG cover 55 has a wall 82 that is continuous over the entire circumference around the rotation axis Rx. Since the wall body 82 is continuous over the entire circumference, the strength of the outer member 55b against the load in the axial direction of the rotation axis Rx increases, and the opening area of the air guide port 88 can be increased with the increase in the strength. .
- the ACG cover 55 is provided with a rectifying plate 88a that is arranged in the air guide port 88 and extends radially with respect to the rotation axis Rx.
- the outside air is straightened by the straightening plate 88a and is introduced in the radial direction.
- the introduction of outside air can be rectified well.
- the rectifying plates 88a are arranged at equal intervals around the rotation axis Rx, the outside air can satisfactorily flow toward the rotation axis Rx.
- the ACG cover 55 is made of resin. Since the ACG cover 55 is made of resin, it does not easily become hot. The ACG cover 55 can be made lighter than a metal cover.
- the ACG cover 55 includes an inner member (first body) 55a surrounding the rotor 72 of the ACG starter 54 around the rotation axis Rx, and an outer member (first member) coupled to the inner member 55a and having an outer peripheral wall 81b. 2) 55b.
- a mesh-like partition 89 that partitions the space surrounded by the inner member 55a from the space surrounded by the outer peripheral wall 81b is formed on the inner member 55a.
- a projection 92 is formed on the outer member 55b and projects toward the partition 89 above a horizontal plane HP including the rotation axis Rx.
- a multi-cylinder internal combustion engine such as a parallel-placed, horizontally opposed, V-type engine may be used for the power unit 32, and a similar two-stroke internal combustion engine is used. You may be.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Motor Or Generator Frames (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
32…パワーユニット
38…クランクケース
55…回転体カバー(ACGカバー)
55a…第1体(内側部材)
55b…第2体(外側部材)
61…クランク軸
72…回転体(ローター)
81b…周壁(外側周壁)
82…壁体
88…導風口
88a…整流板
89…仕切り
92…突起
HP…(回転軸線を含む)水平面
Rx…(クランク軸の)回転軸線 11 ... Saddle riding type vehicle (motorcycle)
32
55a: First body (inner member)
55b 2nd body (outer member)
61
81b ... peripheral wall (outer peripheral wall)
82
Claims (7)
- 回転自在にクランク軸(61)を支持するクランクケース(38)と、
前記クランクケース(38)の外側で前記クランク軸(61)上に設けられ、前記クランク軸(61)の回転軸線(Rx)回りで回転する回転体(72)と、
前記クランクケース(38)に結合されて、前記回転軸線(Rx)回りで前記回転体(72)を囲み前記回転体(72)の収容空間を形成する回転体カバー(55)と
を備える鞍乗り型車両のパワーユニット(32)において、
前記回転体カバー(55)は、軸方向に前記回転体(72)よりも外側で前記回転軸線(Rx)回りに前記収容空間を囲む周壁(81b)を有し、前記周壁(81b)には径方向に外気を導入する導風口(88)が設けられる
ことを特徴とする鞍乗り型車両のパワーユニット。 A crankcase (38) rotatably supporting a crankshaft (61);
A rotating body (72) provided on the crankshaft (61) outside the crankcase (38) and rotating around a rotation axis (Rx) of the crankshaft (61);
A rotating body cover (55) coupled to the crankcase (38) and surrounding the rotating body (72) around the rotation axis (Rx) to form a housing space for the rotating body (72). In the power unit (32) of the type vehicle,
The rotating body cover (55) has a peripheral wall (81b) surrounding the housing space around the rotation axis (Rx) outside the rotating body (72) in the axial direction, and the peripheral wall (81b) has: A power unit for a saddle-ride type vehicle, wherein a wind guide port (88) for introducing outside air in a radial direction is provided. - 請求項1に記載の鞍乗り型車両のパワーユニットにおいて、前記回転体カバー(55)は前記回転軸線(Rx)に同軸に円を描く筒形状に形成され、前記導風口(88)は、前記回転軸線(Rx)を含む水平面(HP)よりも下側に配置されることを特徴とする鞍乗り型車両のパワーユニット。 2. The power unit for a saddle-ride type vehicle according to claim 1, wherein the rotating body cover (55) is formed in a cylindrical shape that draws a circle coaxially with the rotation axis (Rx), and the air guide port (88) includes the rotating body. A power unit for a saddle-ride type vehicle, wherein the power unit is disposed below a horizontal plane (HP) including an axis (Rx).
- 請求項1または2に記載の鞍乗り型車両のパワーユニットにおいて、前記回転体カバー(55)は、前記回転軸線(Rx)回りで全周にわたって連続する壁体(82)を有することを特徴とする鞍乗り型車両のパワーユニット。 3. The power unit for a saddle-ride type vehicle according to claim 1, wherein the rotating body cover (55) has a wall body (82) which is continuous around the rotation axis (Rx) over the entire circumference. 4. Power unit for saddle type vehicles.
- 請求項1~3のいずれか1項に記載の鞍乗り型車両のパワーユニットにおいて、前記回転体カバー(55)には、前記導風口(88)に配置されて、前記回転軸線(Rx)に対して放射状に延びる整流板(88a)が形成されることを特徴とする鞍乗り型車両のパワーユニット。 The power unit for a saddle-ride type vehicle according to any one of claims 1 to 3, wherein the rotating body cover (55) is disposed at the air guide opening (88), and is arranged with respect to the rotation axis (Rx). A power unit for a saddle-ride type vehicle, wherein a rectifying plate (88a) extending radially is formed.
- 請求項4に記載の鞍乗り型車両のパワーユニットにおいて、前記整流板(88a)は前記回転軸線(Rx)回りで等間隔に配置されることを特徴とする鞍乗り型車両のパワーユニット。 The power unit for a saddle-ride type vehicle according to claim 4, wherein the rectifying plates (88a) are arranged at equal intervals around the rotation axis (Rx).
- 請求項1~5のいずれか1項に記載の鞍乗り型車両のパワーユニットにおいて、前記回転体カバー(55)は樹脂製であることを特徴とする鞍乗り型車両のパワーユニット。 The power unit for a saddle-ride type vehicle according to any one of claims 1 to 5, wherein the rotating body cover (55) is made of resin.
- 請求項1~6のいずれか1項に記載の鞍乗り型車両のパワーユニットにおいて、前記回転体カバー(55)は、前記回転軸線(Rx)回りで前記回転体(72)を囲む第1体(55a)と、前記第1体(55a)に結合されて、前記周壁(82)を有する第2体(55b)とを備え、前記第1体(55a)には、前記周壁(82)で囲まれる空間から、前記第1体(55a)で囲まれる空間を仕切る網目状の仕切り(89)が形成され、前記第2体(55b)には、前記回転軸線(Rx)を含む水平面(HP)よりも上方で前記仕切り(89)に向かって突出する突起(92)が形成されることを特徴とする鞍乗り型車両のパワーユニット。 The power unit of a saddle-ride type vehicle according to any one of claims 1 to 6, wherein the rotating body cover (55) surrounds the rotating body (72) around the rotation axis (Rx). 55a) and a second body (55b) coupled to the first body (55a) and having the peripheral wall (82). The first body (55a) is surrounded by the peripheral wall (82). A mesh-like partition (89) for partitioning a space surrounded by the first body (55a) from the space to be formed, and a horizontal plane (HP) including the rotation axis (Rx) on the second body (55b). A power unit for a saddle-ride type vehicle, wherein a projection (92) projecting toward the partition (89) is formed above the partition.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI2021001498A MY194404A (en) | 2018-09-25 | 2019-09-20 | Power unit for straddle-type vehicles |
JP2020549110A JP6986639B2 (en) | 2018-09-25 | 2019-09-20 | Power unit for saddle-riding vehicles |
CN201980059572.8A CN112703307B (en) | 2018-09-25 | 2019-09-20 | Power unit for saddle-ride type vehicle |
BR112021005141-4A BR112021005141A2 (en) | 2018-09-25 | 2019-09-20 | power unit for saddle mounted vehicle |
PH12021550615A PH12021550615A1 (en) | 2018-09-25 | 2021-03-18 | Power unit for straddle-type vehicles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2018178919 | 2018-09-25 | ||
JP2018-178919 | 2018-09-25 |
Publications (1)
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WO2020066877A1 true WO2020066877A1 (en) | 2020-04-02 |
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ID=69950592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2019/036922 WO2020066877A1 (en) | 2018-09-25 | 2019-09-20 | Power unit for straddle-type vehicles |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP6986639B2 (en) |
CN (1) | CN112703307B (en) |
BR (1) | BR112021005141A2 (en) |
MY (1) | MY194404A (en) |
PH (1) | PH12021550615A1 (en) |
WO (1) | WO2020066877A1 (en) |
Cited By (1)
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JP2023077107A (en) * | 2021-11-24 | 2023-06-05 | 本田技研工業株式会社 | power unit |
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JPH07293238A (en) * | 1994-04-26 | 1995-11-07 | Tokyo R & D:Kk | Cooling device for engine |
JPH1182050A (en) * | 1997-09-12 | 1999-03-26 | Honda Motor Co Ltd | Auxiliary machine mounting structure for vehicular engine |
JP2005351115A (en) * | 2004-06-08 | 2005-12-22 | Honda Motor Co Ltd | Oil pump installing structure of internal combustion engine |
JP2015151885A (en) * | 2014-02-12 | 2015-08-24 | スズキ株式会社 | Cooling structure of engine |
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JP4069971B2 (en) * | 2002-03-12 | 2008-04-02 | ハスクバーナ・ゼノア株式会社 | Engine recoil starter |
JP4856487B2 (en) * | 2006-07-19 | 2012-01-18 | 本田技研工業株式会社 | Scooter type motorcycle |
JP5703183B2 (en) * | 2011-09-25 | 2015-04-15 | 本田技研工業株式会社 | Scooter type motorcycle |
JP6182099B2 (en) * | 2014-03-31 | 2017-08-16 | 本田技研工業株式会社 | Power unit for saddle-ride type vehicles |
JP6235438B2 (en) * | 2014-09-10 | 2017-11-22 | 本田技研工業株式会社 | Forced air-cooled internal combustion engine |
-
2019
- 2019-09-20 BR BR112021005141-4A patent/BR112021005141A2/en not_active Application Discontinuation
- 2019-09-20 MY MYPI2021001498A patent/MY194404A/en unknown
- 2019-09-20 JP JP2020549110A patent/JP6986639B2/en active Active
- 2019-09-20 CN CN201980059572.8A patent/CN112703307B/en active Active
- 2019-09-20 WO PCT/JP2019/036922 patent/WO2020066877A1/en active Application Filing
-
2021
- 2021-03-18 PH PH12021550615A patent/PH12021550615A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH03222812A (en) * | 1990-01-26 | 1991-10-01 | Yamaha Motor Co Ltd | Forcedly air cooled engine |
JPH07293238A (en) * | 1994-04-26 | 1995-11-07 | Tokyo R & D:Kk | Cooling device for engine |
JPH1182050A (en) * | 1997-09-12 | 1999-03-26 | Honda Motor Co Ltd | Auxiliary machine mounting structure for vehicular engine |
JP2005351115A (en) * | 2004-06-08 | 2005-12-22 | Honda Motor Co Ltd | Oil pump installing structure of internal combustion engine |
JP2015151885A (en) * | 2014-02-12 | 2015-08-24 | スズキ株式会社 | Cooling structure of engine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023077107A (en) * | 2021-11-24 | 2023-06-05 | 本田技研工業株式会社 | power unit |
JP7333372B2 (en) | 2021-11-24 | 2023-08-24 | 本田技研工業株式会社 | power unit |
Also Published As
Publication number | Publication date |
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PH12021550615A1 (en) | 2021-10-04 |
CN112703307B (en) | 2023-04-11 |
BR112021005141A2 (en) | 2021-06-15 |
JP6986639B2 (en) | 2021-12-22 |
MY194404A (en) | 2022-11-30 |
CN112703307A (en) | 2021-04-23 |
JPWO2020066877A1 (en) | 2021-08-30 |
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