WO2021002236A1 - Structure de moteur à combustion interne - Google Patents

Structure de moteur à combustion interne Download PDF

Info

Publication number
WO2021002236A1
WO2021002236A1 PCT/JP2020/024474 JP2020024474W WO2021002236A1 WO 2021002236 A1 WO2021002236 A1 WO 2021002236A1 JP 2020024474 W JP2020024474 W JP 2020024474W WO 2021002236 A1 WO2021002236 A1 WO 2021002236A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankshaft
internal combustion
combustion engine
detection device
rotor
Prior art date
Application number
PCT/JP2020/024474
Other languages
English (en)
Japanese (ja)
Inventor
裕介 富岡
淳平 勝田
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to EP20835661.8A priority Critical patent/EP3992441B1/fr
Publication of WO2021002236A1 publication Critical patent/WO2021002236A1/fr

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/18—Packaging of the electronic circuit in a casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/21—Engine cover with integrated cabling

Definitions

  • the present invention relates to an internal combustion engine structure.
  • the present invention claims priority based on Japanese Patent Application No. 2019-122892 filed in Japan on July 1, 2019, the contents of which are incorporated herein by reference.
  • Patent Document 1 a structure including a detected body that rotates integrally with a crankshaft and a detection sensor that generates a pulse signal according to the movement of the detected body.
  • the structure of Patent Document 1 includes an annular plate-shaped pulsar ring (detected body) coaxially connected to the crankshaft along the rotation axis of the crankshaft, and the movement of the pulsar ring facing the annular trajectory of the pulsar ring. It is provided with a pulsar sensor (detection sensor) that generates a pulse signal accordingly.
  • the detection sensor By the way, from the viewpoint of improving the detection accuracy of the detection sensor, it is required to suppress the runout of the crankshaft. On the other hand, it is desired to arrange the detection sensor at a suitable position.
  • an object of the present invention is to arrange the detection device at a suitable position while suppressing the runout of the crankshaft in the internal combustion engine structure.
  • the internal combustion engine structure converts the reciprocating motion of the piston (24) arranged inside the cylinder (12) of the internal combustion engine (2) mounted on the vehicle into a rotary motion.
  • the internal combustion engine structure converts the reciprocating motion of the piston (24) arranged inside the cylinder (12) of the internal combustion engine (2) mounted on the vehicle into a rotary motion.
  • the detection device (16) is further provided with a bearing member (52) that receives the end portion of the crankshaft (52), and is arranged in the vicinity of the bearing member (52) within the range of the crankshaft (10) in the vehicle width direction. You may.
  • the internal combustion engine structure converts the reciprocating motion of the piston (24) arranged inside the cylinder (12) of the internal combustion engine (2) mounted on the vehicle into a rotary motion.
  • a support member that covers the detection device (16) from at least one direction and supports a plurality of functional components (66). (17) may be further provided.
  • the case member (11) includes a breather chamber (30) having a labyrinth structure, and the detection is performed from a side view.
  • the device (16) may overlap with the breather chamber (30).
  • the detection device (16) passes through the center (P2) of the crankshaft (10) in a side view. It may be arranged in the vicinity of the orthogonal virtual line (K1) orthogonal to the central axis (C1) of the cylinder (12).
  • the internal combustion engine structure according to any one of (1) to (7) above is further provided with a connecting boss (36) for connecting the internal combustion engine (2) and the vehicle body frame (6), and has a side surface.
  • the detection device (16) is a balancer shaft that suppresses vibration between the starting device (15) that starts the internal combustion engine (2) and the connecting boss (36), or the crankshaft (10). It may be arranged between (14) and the connecting boss (36).
  • a generator having a rotor (71) rotatable around the central axis (C2) of the crankshaft (10).
  • the rotor (71) includes a plurality of protrusions (72) provided over the outer periphery of the rotor (71), and the protrusion (72) is the center of the crankshaft (10). It may be arranged on the same plane as the detection device (16) on the virtual plane (S1) orthogonal to the axis (C2).
  • a generator having a rotor (71) rotatable around the central axis (C2) of the crankshaft (10).
  • the rotor (71) includes a disk-shaped bottom plate portion (71c) and a plurality of protrusions (72) provided over the outer periphery of the rotor (71), and the protrusions (72) are provided.
  • a generator having a rotor (71) rotatable around the central axis (C2) of the crankshaft (10).
  • the rotor (71) includes a plurality of protrusions (72) provided over the outer periphery of the rotor (71), and the protrusions (72) in the radial direction of the crankshaft (10).
  • the length (H1) may be longer than the length (T1) of the protrusion (72) in the circumferential direction of the crankshaft (10).
  • the cover member (13) covering the case member (11) and the cover member (13) are provided with the cover member (13).
  • the detection is further provided with a bearing member (52) that receives the end of the crankshaft (10) and a second bearing member (57) that is provided on the case member (11) and receives the crankshaft (10).
  • the device (16) may be unevenly arranged on one side between the bearing member (52) and the second bearing member (57).
  • the cover member (13) covering the case member (11) and the cover member (13) are provided with the cover member (13).
  • the cover member (13) covering the case member (11) and the cover member (13) are provided with the above.
  • the cover member (13) covering the case member (11) and the cover member (13) are provided with the cover member (13).
  • a bearing member (52) that receives the end portion of the crankshaft (10) is further provided, and the cover member (13) includes a bearing fitting portion (53) into which the bearing member (52) is fitted, and the bearing. It may have one or more extending portions (54) radially extending from the fitting portion (53).
  • the balancer shaft that suppresses the vibration of the crankshaft
  • the starting device that starts the internal combustion engine
  • the balancer shaft and the starting device in a side view.
  • the balancer shaft that suppresses the vibration of the crankshaft and the virtual line connecting the center of the crankshaft and the center of the balancer shaft and the cylinder in a side view
  • the balancer shaft can suppress the runout of the crankshaft.
  • the space between the virtual line connecting the center of the crankshaft and the center of the balancer shaft and the central axis of the cylinder can be effectively used as a space for arranging the detection device. Therefore, the detection device can be arranged at a suitable position while suppressing the runout of the crankshaft.
  • the detection device since the detection device is arranged at a position where the vibration of the crankshaft is neutralized by the balancer shaft, the detection accuracy of the detection device can be improved.
  • the detection device further includes a cover member for covering the case member and a bearing member provided on the cover member for receiving the end portion of the crankshaft.
  • the bearing member provided on the cover member and receiving the end portion of the crankshaft is arranged in the vicinity of the bearing member within the range of the crankshaft in the vehicle width direction.
  • the following effects can be obtained by covering the detection device from at least one direction and further providing a support member for supporting a plurality of functional components. Since the detection device is covered by the support member from at least one direction, the detection device can be protected from external factors (for example, stepping stones). In addition, since the support member also has a function of supporting a plurality of functional parts, it is possible to reduce the number of parts and reduce the cost as compared with the case where a dedicated protective member for protecting the detection device is separately provided. it can.
  • the case member includes a breather chamber having a labyrinth structure, and the detection device overlaps with the breather chamber in a side view to obtain the following effects.
  • the space that overlaps with the breather room when viewed from the side can be effectively used as the placement space for the detection device.
  • the detection device is arranged in the vicinity of an orthogonal virtual line that passes through the center of the crankshaft and is orthogonal to the central axis of the cylinder in a side view.
  • the following effects are achieved. Since the detection device is arranged at a position that is not easily affected by vibration in the direction along the central axis of the cylinder due to the reciprocating motion of the piston, the detection accuracy of the detection device can be improved.
  • a connecting boss that connects the internal combustion engine and the vehicle body frame is further provided, and in a side view, the detection device is a starting device that starts the internal combustion engine and a connecting boss.
  • a generator having a rotor that can rotate around the central axis of the crankshaft is further provided, and the rotor has a disk-shaped bottom plate portion and an outer circumference of the rotor. It is provided with a plurality of protrusions provided over the span, and the protrusions are provided on the side of the bottom plate portion, thereby achieving the following effects. Compared with the case where the protrusion is provided on the side opposite to the bottom plate portion (the tip side of the rotor), it is less affected by the runout of the rotor, so that the detection accuracy of the detection device can be improved.
  • a generator having a rotor that can rotate around the central axis of the crankshaft is further provided, and the rotor has a plurality of protrusions provided over the outer periphery of the rotor.
  • the length of the protrusion in the radial direction of the crankshaft is longer than the length of the protrusion in the circumferential direction of the crankshaft, so that the following effects are obtained.
  • the detection accuracy of the detection device can be improved as compared with the case where the length of the protrusion in the radial direction of the crankshaft is equal to or less than the length of the protrusion in the circumferential direction of the crankshaft.
  • the number of parts can be reduced and the axial length of the crankshaft can be shortened as compared with the structure in which the pulsar ring is coupled to the crankshaft.
  • a cover member for covering the case member, a bearing member provided on the cover member and receiving the end portion of the crankshaft, and a crankshaft provided on the case member.
  • the detection device is further provided with a second bearing member to receive the bearing, and the detection device is biased to one side between the bearing member and the second bearing member, thereby achieving the following effects.
  • the detection device is arranged at the center position between the bearing member and the second bearing member, it is less affected by the runout of the crankshaft during detection, so that the detection accuracy of the detection device can be improved. ..
  • the cover member covering the case member, the bearing member provided on the cover member and receiving the end portion of the crankshaft, and the bearing member arranged inside the cover member.
  • a generator having a rotor that can rotate around the central axis of the crankshaft is further provided, and the rotor is adjacent to the bearing member in the axial direction of the crankshaft, thereby achieving the following effects.
  • the space adjacent to the bearing member in the axial direction of the crankshaft can be effectively used as the rotor placement space.
  • the cover member covering the case member, the bearing member provided on the cover member and receiving the end portion of the crankshaft, and the inside of the cover member are arranged.
  • a generator having a rotor that can rotate around the central axis of the crankshaft is further provided, and at least a part of the rotor overlaps the bearing member in the axial direction of the crankshaft to achieve the following effects.
  • the space that overlaps the bearing member in the axial direction of the crankshaft can be effectively used as the rotor placement space.
  • the cover member further includes a cover member for covering the case member and a bearing member provided on the cover member for receiving the end portion of the crankshaft.
  • FIG. 1 is a diagram showing a state in which the link mechanism and the like are removed in FIG.
  • FIG. 3 is a sectional view taken along line III-III of FIG.
  • FIG. 2 is a sectional view taken along line IV-IV of FIG.
  • It is a right side view which shows the arrangement of the balancer shaft and the start device of an embodiment.
  • It is a right side view which shows the support member of an embodiment and its peripheral structure.
  • It is a perspective view which looked at the cover member of embodiment from the inside in the vehicle width direction.
  • It is a right side view which shows the generator of an embodiment and its peripheral structure. It is the figure which looked at the generator of embodiment from the direction along the crank axis.
  • It is a right side view which shows the arrangement of the detection apparatus of the modification of embodiment.
  • the power unit 1 includes an engine 2 which is an internal combustion engine, a transmission device 4 which transmits the power of the engine 2 to the rear wheels 3 (see FIG. 3), and a swing arm 5 which supports the rear wheels 3.
  • the rear end portion of the power unit 1 is connected to the vehicle body frame 6 (specifically, a seat rail (specifically, not shown) via a cushion unit (not shown).
  • the power unit 1 has a function of a suspension device that swingably connects the rear wheels 3 to the vehicle body frame 6.
  • the engine 2 includes a crankshaft 10 extending in the vehicle width direction, a crankcase 11 (case member) accommodating the crankshaft 10, and substantially forward (specifically, slightly forward and upward with respect to the horizontal plane) from the front end of the crankcase 11. ), A cover member 13 that covers the crankcase 11 from the right side, a balancer shaft 14 that suppresses the vibration of the crankshaft 10 (see FIG. 5), and a starting device that starts the engine 2. 15 (see FIG. 5), a detection device 16 that detects the number of rotations of the crankshaft 10, a support member 17 that supports a plurality of functional components 66, and a generator 18 (FIG. 3) arranged inside the cover member 13. See) and.
  • the central axis C1 of the cylinder portion 12 along the protruding direction of the cylinder portion 12 is also referred to as “cylinder axis C1”.
  • the transmission device 4 includes a power transmission mechanism (not shown) that transmits the power of the engine 2 to the rear wheels 3 (see FIG. 3), and a transmission case 20 that houses the power transmission mechanism.
  • the power transmission mechanism includes a belt-type continuously variable transmission mechanism and a reduction gear.
  • the power of the engine 2 is changed and transmitted to the rear wheels 3 via the power transmission mechanism.
  • Reference numeral 3a in the figure indicates a rear wheel axle.
  • the transmission case 20 extends rearward from the left side portion of the crankcase 11.
  • An air cleaner 21 for purifying the outside air is provided on the upper part of the transmission case 20.
  • the swing arm 5 is connected to the right side of the crankcase 11.
  • the swing arm 5 extends rearward from the rear end of the right side portion of the crankcase 11.
  • the swing arm 5 faces the transmission case 20 with the rear wheel 3 sandwiched in the vehicle width direction (see FIG. 3).
  • the swing arm 5 is fastened to the upper and lower parts of the rear end of the crankcase 11 by a pair of upper and lower bolts.
  • the swing arm 5 When viewed from the right side, the swing arm 5 has an opening 5a that exposes the inner side surface of the transmission case 20 in the vehicle width direction to the right.
  • crankshaft 10 is connected to a piston 24 arranged inside the cylinder portion 12 via a connecting rod 23.
  • the crankshaft 10 converts the reciprocating motion of the piston 24 along the cylinder axis C1 into a rotary motion.
  • the crankshaft 10 is provided with a crank gear 26 that meshes with the balancer gear 25.
  • crankshaft center P2 the center of the crankshaft 10
  • crankshaft line C2 the center axis of the crankshaft 10
  • the crankcase 11 has a breather chamber 30 for gas-liquid separation of blow-by gas inside the crankcase 11.
  • the breather chamber 30 has a labyrinth structure.
  • the breather chamber 30 is formed so as to straddle the right side portion of the crankcase 11 and the cover member 13.
  • the breather chamber 30 is formed by a peripheral wall 31 of the crankcase 11, a peripheral wall 32 of the cover member 13, and a partition wall 33 extending in the front-rear direction in a side view. From a side view, the breather chamber 30 is provided from the front end portion of the upper portion of the crankcase 11 to the front-rear center portion of the upper portion of the crankcase 11.
  • the breather chamber 30 has a rear extending portion 34 extending rearward in a lateral view.
  • the crankcase 11 includes a connecting boss 36 connected to the vehicle body frame 6.
  • the connecting boss 36 projects forward from the lower front part of the crankcase 11.
  • the connecting boss 36 is swingably connected to the vehicle body frame 6 (specifically, the bracket 7 connected to the vehicle body frame 6) via the link mechanism 40.
  • reference numeral 37 indicates an oil pan for storing lubricating oil
  • reference numeral 38 indicates a cooling pump for pumping cooling water to a cooling required portion in the power unit.
  • the link mechanism 40 is arranged below the cylinder portion 12.
  • the link mechanism 40 includes a first link 41 extending vertically in a side view and a second link 42 extending back and forth in a side view.
  • the first link 41 has a cam shape having a long axis in the vertical direction in a side view.
  • the upper portion of the first link 41 is rotatably connected to the bracket 7.
  • the front end of the second link 42 is rotatably connected to the lower part of the first link 41.
  • the rear end of the second link 42 is rotatably connected to the connecting boss 36.
  • Reference numeral P1 in the figure indicates the center of rotation of the second link 42 with respect to the connecting boss 36 (hereinafter, also referred to as “boss center”).
  • the cylinder portion 12 includes a cylinder block 45 projecting substantially forward from the front end portion of the crankcase 11, a cylinder head 46 connected to the front end portion of the cylinder block 45, and a front end portion of the cylinder head 46.
  • the head cover 47 is connected to the head cover 47.
  • the cylinder head 46, together with the cylinder block 45, is fastened and fixed to the front surface of the crankcase 11 by a plurality of bolts.
  • the cylinder head 46 is connected to an intake system component (not shown) that introduces an air-fuel mixture into the combustion chamber and an exhaust system component (exhaust pipe (not shown)) that discharges the gas after combustion from the combustion chamber.
  • the cover member 13 is connected to the right side portion of the crankcase 11.
  • the cover member 13 is fastened to the crankcase 11 by a plurality of bolts.
  • the cover member 13 has an insertion hole 50 into which the detection device 16 can be inserted from the outside.
  • the cover member 13 has a plurality of bolt insertion holes 51 formed at intervals along the outer circumference of the cover member 13.
  • the cover member 13 is provided with a bearing member 52 that receives the right end portion of the crankshaft 10.
  • the cover member 13 has a bearing fitting portion 53 into which the bearing member 52 is fitted, and a plurality of extending portions 54 radially extending from the bearing fitting portion 53.
  • the bearing member 52 rotatably supports the right end of the crankshaft 10.
  • the bearing member 52 is a ball bearing.
  • the extending portion 54 projects inward in the vehicle width direction from the inner side surface of the cover member 13 in the vehicle width direction.
  • the number of the extending portions 54 is not limited to a plurality, and may be a single number.
  • the balancer shaft 14 extends in the vehicle width direction in parallel with the crankshaft 10.
  • the center of the balancer shaft 14 is also referred to as a “balancer axis”.
  • the balancer axis P3 is located substantially above the crank axis P2 (specifically, slightly forward of the position directly above the crank axis P2).
  • the balancer shaft 14 is rotatably supported by the crankcase 11 via a bearing 55.
  • the bearing 55 may be a seal bearing or the like having a slight gap for holding oil in the bearing.
  • a balancer gear 25 is attached to the balancer shaft 14 via a damper member 56.
  • the balancer shaft 14 rotates synchronously with the crankshaft 10 via the balancer gear 25 and the crank gear 26. As a result, the rotational fluctuation of the crankshaft 10 is canceled and the rotational balance is maintained.
  • the starting device 15 is arranged at the rear upper part of the crankcase 11.
  • the starting device 15 includes a starter motor 59 for starting the engine 2.
  • the rotation center P4 of the shaft portion of the starter motor 59 is also referred to as "starter shaft center P4".
  • the starter axis P4 is located rearward and upper of the crankshaft P2.
  • the starter axis P4 is located substantially behind the balancer axis P3 (specifically, slightly above the position directly behind the balancer axis P3).
  • the support member 17 is attached to the upper part of the cover member 13.
  • the support member 17 covers the detection device 16 from the right side.
  • the support member 17 is fastened to the cover member 13 by a plurality of bolts.
  • the support member 17 includes a first stay 61 connected to the cover member 13 and a second stay 62 connected to the first stay 61.
  • the first stay 61 extends back and forth so as to overlap the upper part of the cover member 13.
  • the lower portion of the first stay 61 is fastened to the cover member 13 by a pair of front and rear bolts.
  • the first stay 61 has a clamp mounting portion 63 arranged between a pair of front and rear bolts.
  • a hose clamp 65 that supports an intermediate portion of the hose 64 extending in the front-rear direction is attached to the clamp mounting portion 63.
  • the second stay 62 extends back and forth so as to cover the first stay 61 from above.
  • the lower part of the second stay 62 is fastened to the upper part of the first stay 61 by a pair of front and rear bolts.
  • the second stay 62 supports a plurality of functional components 66 such as an ignition coil, a check valve of a secondary air supply device, and a drive sensor thereof.
  • the generator 18 is covered from the right side by the cover member 13.
  • the generator 18 includes a stator 70 fixed to the cover member 13 and a rotor 71 rotatably fixed to the crankshaft 10.
  • the stator 70 has a plurality of coils 70a (see FIG. 10).
  • the rotor 71 has a plurality of magnets (not shown) facing the coil 70a in the radial direction.
  • the rotor 71 can rotate around the crank axis C2 according to the rotation of the crankshaft 10.
  • the rotor 71 is adjacent to the bearing member 52 in the axial direction of the crankshaft 10.
  • a part (central part) of the rotor 71 overlaps with the bearing member 52 in the axial direction of the crankshaft 10. Not only a part of the rotor 71 overlaps the bearing member 52 in the axial direction of the crankshaft 10, but the entire rotor 71 may overlap the bearing member 52 in the axial direction of the crankshaft 10. That is, at least a part of the rotor 71 may overlap the bearing member 52 in the axial direction of the crankshaft 10.
  • the rotor 71 has a bottomed tubular shape or a cone shape coaxial with the crank axis C2.
  • the rotor 71 has a cylindrical or conical inner cylinder portion 71a located radially inside the stator 70 and connected to the right end of the crankshaft 10, and a cylindrical or conical inner cylinder portion 71a covering the stator 70 from the radial outside.
  • the outer cylinder portion 71b is provided with a disk-shaped bottom plate portion 71c that connects the inner end of the inner cylinder portion 71a in the vehicle width direction and the inner end of the outer cylinder portion 71b in the vehicle width direction.
  • the rotor 71 includes a plurality of protrusions 72 provided over the outer circumference of the outer cylinder portion 71b.
  • the protrusion 72 is arranged on the same plane as the detection device 16 on the virtual plane S1 orthogonal to the crank axis C2 (see FIG. 4).
  • the protrusion 72 is provided on the bottom plate portion 71c side of the rotor 71 on the front end side (right end side) (see FIG. 4).
  • 34 protrusions 72 are arranged at intervals in the circumferential direction.
  • the rotor 71 has a protrusion forming region 73 in which 34 protrusions 72 are formed at a central angle of 10 °, and a protrusion non-forming region 74 in which the protrusions 72 are not arranged.
  • the protrusion non-forming region 74 is a region for detecting the top dead center and the bottom dead center of the piston 24 (see FIG. 3).
  • the length H1 of the protrusion 72 in the radial direction of the crankshaft 10 is also referred to as “protrusion height H1”
  • the length of the protrusion 72 in the circumferential direction of the crankshaft 10 is also referred to as “protrusion thickness T1”.
  • the protrusion height H1 means the distance between the outer peripheral surface of the outer cylinder portion 71b and the tip of the protrusion 72.
  • the protrusion thickness T1 means the distance between the circumferential upstream end and the circumferential downstream end of the protrusion 72. As shown in FIG. 11, the protrusion height H1 is longer than the protrusion thickness T1 (H1> T1).
  • the protrusions 72 are substantially from the rising portion 72c that gently rises from the surface of the outer cylinder portion 71b, the vertical portion 72b that is continuous with the rising portion 72c and extends outward in the radial direction of the outer cylinder portion 71b, and the extending end of the vertical portion 72b. It includes a tip portion 72a that is orthogonal and extends along the circumferential direction of the outer cylinder portion 71b. In one protrusion 72, the vertical portions 72b facing each other are substantially parallel to each other.
  • the detection device 16 is inserted into the insertion hole 50 of the cover member 13 from the outside.
  • the detection device 16 is arranged above the crankshaft center P2.
  • the detection device 16 is a pulsar sensor that generates a pulse signal according to the movement of the protrusion 72.
  • the detection device 16 has a tip 16a (detection unit) for detecting the protrusion 72.
  • the tip 16a of the detection device 16 is arranged so as to direct the crankshaft center P2 (see FIG. 2).
  • the detection device 16 outputs an electric signal according to the presence or absence of the protrusion 72 detected on the outer circumference of the outer cylinder portion 71b.
  • the detection result of the detection device 16 is sent to an ECU (Engine Control Unit) (not shown) which is a control device of the engine 2.
  • the ECU estimates an engine misfire when the amount of change in the number of revolutions of the crankshaft 10 (the amount of change in angular velocity) exceeds a threshold value during a preset number of cycles.
  • the detection device 16 is arranged in the vicinity of the orthogonal virtual line K1 that passes through the crankshaft center P2 and is orthogonal to the cylinder axis C1 (see FIG. 8).
  • the vicinity of the orthogonal virtual line K1 means a range of ⁇ 30 ° around the crankshaft center P2 with respect to the orthogonal virtual line K1.
  • the clockwise direction (clockwise) of the paper surface is positive and the counterclockwise direction (counterclockwise direction) of the paper surface is negative with respect to the orthogonal virtual line K1 around the crankshaft center P2.
  • the detection device 16 is arranged in a range of + 30 ° around the crankshaft center P2 with respect to the orthogonal virtual line K1 (see FIG. 8).
  • Reference numeral K2 in the figure indicates a virtual line forming an angle A1 of + 30 ° around the crankshaft center P2 with respect to the orthogonal virtual line K1.
  • reference numeral 57 indicates a second bearing member provided on the crankcase 11 and receiving the crankshaft 10.
  • the second bearing member is a needle bearing.
  • the detection device 16 is unevenly arranged on the bearing member 52 between the bearing member 52 and the second bearing member 57. That is, the detection device 16 is arranged closer to the bearing member 52 than to the second bearing member 57.
  • the internal combustion engine structure 1 of the above embodiment includes a crankshaft 10 that converts the reciprocating motion of the piston 24 arranged inside the cylinder portion 12 of the engine 2 mounted on the vehicle into a rotary motion.
  • the balancer shaft 14 can suppress the runout of the crankshaft 10.
  • the space between the balancer shaft 14 and the starting device 15 can be effectively used as an arrangement space for the detection device 16. Therefore, the detection device 16 can be arranged at a suitable position while suppressing the runout of the crankshaft 10.
  • the internal combustion engine structure 1 includes a cover member 13 that covers the crankcase 11, and a bearing member 52 that is provided on the cover member 13 and receives an end portion of the crankshaft 10.
  • the detection device 16 is a vehicle. By being arranged in the vicinity of the bearing member 52 within the range of the crankshaft 10 in the width direction, the following effects are obtained.
  • the bearing member 52 can suppress the runout of the end portion of the crankshaft 10. Therefore, the runout of the crankshaft 10 can be suppressed more effectively in combination with the action of the balancer shaft 14, so that the detection accuracy of the detection device 16 can be further improved.
  • the space in the vicinity of the bearing member 52 can be effectively used as the placement space for the detection device 16.
  • the detection device 16 is arranged in the vicinity of the orthogonal virtual line K1 that passes through the crankshaft center P2 and is orthogonal to the cylinder axis C1 in the side view, thereby achieving the following effects. Since the detection device 16 is arranged at a position that is not easily affected by vibration in the direction along the cylinder axis C1 due to the reciprocating motion of the piston 24, the detection accuracy of the detection device 16 can be improved.
  • the internal combustion engine structure 1 includes a connecting boss 36 that connects the engine 2 and the vehicle body frame 6, and the detection device 16 is a side view of the starting device 15 that starts the engine 2 and the connecting boss 36. By being placed between them, the following effects are achieved.
  • the space between the starting device 15 and the connecting boss 36 in a side view can be effectively used as an arrangement space for the detecting device 16.
  • the internal combustion engine structure 1 includes a generator 18 having a rotor 71 rotatable around the crank axis C2, and the rotor 71 includes a plurality of protrusions 72 provided over the outer periphery of the rotor 71.
  • the 72 is arranged on the same plane as the detection device 16 on the virtual plane S1 orthogonal to the crank axis C2, and thus has the following effects.
  • the detection accuracy of the detection device 16 can be improved as compared with the case where the protrusion 72 is arranged on a virtual plane different from that of the detection device 16.
  • the rotor 71 includes a disk-shaped bottom plate portion 71c and a plurality of protrusions 72 provided over the outer circumference of the rotor 71, and the protrusions 72 are provided on the side of the bottom plate portion 71c.
  • the protrusion height H1 is longer than the protrusion thickness T1 to obtain the following effects.
  • the detection accuracy of the detection device 16 can be improved as compared with the case where the protrusion height H1 is the protrusion thickness T1 or less. Therefore, it is suitable for realizing a vehicle self-diagnosis function (for example, OBD2; On Board Diagnosis second generation).
  • a vehicle self-diagnosis function for example, OBD2; On Board Diagnosis second generation.
  • the number of parts can be reduced and the axial length of the crankshaft 10 can be shortened.
  • the crankcase 11 is provided with a second bearing member 57 that receives the crankshaft 10, and the detection device 16 is biased toward the bearing member 52 between the bearing member 52 and the second bearing member 57.
  • the detection accuracy of the detection device 16 is improved because it is less affected by the runout of the crankshaft 10 during detection. Can be improved.
  • the rotor 71 has the following effects when it is adjacent to the bearing member 52 in the axial direction of the crankshaft 10.
  • the space adjacent to the bearing member 52 in the axial direction of the crankshaft 10 can be effectively used as the arrangement space for the rotor 71.
  • a part of the rotor 71 overlaps with the bearing member 52 in the axial direction of the crankshaft 10 to obtain the following effects.
  • the space overlapping the bearing member 52 in the axial direction of the crankshaft 10 can be effectively used as the arrangement space for the rotor 71.
  • the cover member 13 has the following effects by having a bearing fitting portion 53 into which the bearing member 52 is fitted and a plurality of extending portions 54 radially extending from the bearing fitting portion 53. Play.
  • the bearing member 52 can be firmly held by the bearing fitting portion 53.
  • the extension portion 54 can increase the rigidity of the cover member 13 (peripheral portion of the bearing fitting portion 53).
  • the balancer shaft 14 can suppress the runout of the crankshaft 10.
  • the space between the virtual line K3 connecting the crankshaft center P2 and the balancer shaft center P3 and the cylinder axis C1 can be effectively used as an arrangement space for the detection device 16. Therefore, the detection device 16 can be arranged at a suitable position while suppressing the runout of the crankshaft 10.
  • the detection device 16 since the detection device 16 is arranged at a position where the vibration of the crankshaft 10 is neutralized by the balancer shaft 14, the detection accuracy of the detection device 16 can be improved.
  • the detection device 16 has been described with reference to an example in which the detection device 16 is arranged between the starting device 15 and the connecting boss 36, but the present invention is not limited to this.
  • the detection device 16 may be arranged between the balancer shaft 14 and the connecting boss 36. According to this configuration, the space between the balancer shaft 14 and the connecting boss 36 can be effectively used as the arrangement space of the detection device 16 in the side view.
  • the detection device 16 is arranged between the balancer shaft 14 and the starting device 15 and is arranged in the vicinity of the bearing member 52 in a side view, but the present invention is not limited to this.
  • the detection device 16 may not be arranged in the vicinity of the bearing member 52. That is, from the side view, the detection device 16 may be arranged between the balancer shaft 14 and the starting device 15.
  • the detection device 16 does not have to be arranged between the balancer shaft 14 and the starting device 15.
  • it may be arranged in the vicinity of the bearing member 52.
  • the bearing member 52 can suppress the runout of the crankshaft 10.
  • the space in the vicinity of the bearing member 52 can be effectively used as the placement space for the detection device 16. Therefore, the detection device 16 can be arranged at a suitable position while suppressing the runout of the crankshaft 10.
  • the support member 17 covers the detection device 16 from the right side, but the description is not limited to this.
  • the support member 17 may cover the detection device 16 from above and below and from the front and back. That is, the support member 17 may cover the detection device 16 from at least one direction.
  • the detection device 16 is arranged in a range of + 30 ° around the crankshaft center P2 with respect to the orthogonal virtual line K1 in a side view, but the present invention is not limited to this.
  • the detection device 16 may be arranged in a range of ⁇ 30 ° around the crankshaft center P2 with respect to the orthogonal virtual line K1. That is, from the side view, the detection device 16 may be arranged in the vicinity of the orthogonal virtual line K1.
  • the detection device 16 overlaps with the breather chamber 30 in the side view, but the description is not limited to this.
  • the detection device 16 may be arranged at a position that does not overlap with the breather chamber 30.
  • the detection device 16 has been described with an example of being arranged above the crankshaft center P2, but the present invention is not limited to this.
  • the detection device 16 may be arranged below the crankshaft center P2.
  • the protrusion height H1 in the rotor 71 may be a length (H1 ⁇ T1) equal to or less than the protrusion thickness T1.
  • the link mechanism 40 includes a first link 41 extending vertically in a side view and a second link 42 extending back and forth in a side view has been described, but the present invention is not limited to this.
  • the link mechanism 40 may include only a single link that extends back and forth in a lateral view. That is, the link mechanism 40 can adopt various modes as long as the connecting boss 36 is swingably connected to the vehicle body frame 6.
  • the internal combustion engine structure 1 is applied to a scooter type vehicle, but the present invention is not limited to this.
  • the internal combustion engine structure 1 may be applied to a vehicle other than a scooter type vehicle such as a motorcycle.
  • the saddle-mounted vehicle includes a general vehicle in which a driver straddles a vehicle body, and is a motorcycle (motorized bicycle and scooter-type vehicle). (Including), but also three-wheeled vehicles (including front two-wheeled and rear one-wheeled vehicles in addition to front one-wheeled and rear two-wheeled vehicles).
  • the present invention can be applied not only to motorcycles but also to four-wheeled vehicles such as automobiles.
  • the configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as replacing the components of the embodiment with well-known components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

La présente invention concerne une structure de moteur à combustion interne dotée : d'un vilebrequin (10) destiné à convertir un mouvement de va-et-vient d'un piston (24) disposé à l'intérieur d'un cylindre (12) d'un moteur à combustion interne (2) monté dans un véhicule en un mouvement de rotation ; d'un élément de boîtier (11) recevant le vilebrequin (10) ; d'un arbre d'équilibrage (14) destiné à supprimer les vibrations du vilebrequin (10) ; d'un dispositif de démarrage (15) destiné à démarrer le moteur à combustion interne (2) ; et d'un dispositif de détection (16) qui est disposé entre l'arbre d'équilibrage (14) et le dispositif de démarrage (15) lorsqu'il est vu depuis le côté, et qui détecte la vitesse de rotation du vilebrequin (10).
PCT/JP2020/024474 2019-07-01 2020-06-22 Structure de moteur à combustion interne WO2021002236A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20835661.8A EP3992441B1 (fr) 2019-07-01 2020-06-22 Structure de moteur à combustion interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-122892 2019-07-01
JP2019122892 2019-07-01

Publications (1)

Publication Number Publication Date
WO2021002236A1 true WO2021002236A1 (fr) 2021-01-07

Family

ID=74100279

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/024474 WO2021002236A1 (fr) 2019-07-01 2020-06-22 Structure de moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP3992441B1 (fr)
WO (1) WO2021002236A1 (fr)

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57107923U (fr) * 1980-12-22 1982-07-03
JPS63101539A (ja) * 1986-10-16 1988-05-06 Isuzu Motors Ltd 機関のバランスシヤフト駆動装置
JPH0199977U (fr) * 1987-12-23 1989-07-05
JPH04203226A (ja) * 1990-11-28 1992-07-23 Yamaha Motor Co Ltd 自動二輪車の駆動装置
JPH0942053A (ja) * 1995-07-28 1997-02-10 Kubota Corp クランクケース一体型シリンダブロック
JP2001264113A (ja) * 2000-03-14 2001-09-26 Nissan Diesel Motor Co Ltd パルス発生装置
JP2002242756A (ja) * 2001-02-16 2002-08-28 Fuji Heavy Ind Ltd エンジン用ベアリングケース
JP2008223593A (ja) * 2007-03-13 2008-09-25 Yamaha Motor Co Ltd 内燃機関およびそれを備えた車両
JP2009067336A (ja) * 2007-09-18 2009-04-02 Yamaha Motor Co Ltd 自動二輪車
JP2010127265A (ja) * 2008-12-01 2010-06-10 Honda Motor Co Ltd 車両用エンジン
JP2011163249A (ja) * 2010-02-12 2011-08-25 Honda Motor Co Ltd 内燃機関のクランクケース構造
JP2011196250A (ja) * 2010-03-19 2011-10-06 Honda Motor Co Ltd 車速センサ取付構造
JP2012197712A (ja) * 2011-03-22 2012-10-18 Kubota Corp 電子部品のカプラの保護装置
JP2014105626A (ja) * 2012-11-27 2014-06-09 Yamaha Motor Co Ltd 鞍乗り型車両
JP2014163353A (ja) * 2013-02-27 2014-09-08 Honda Motor Co Ltd 鞍乗型車両の回転速センサ取付構造
JP2015028320A (ja) * 2013-07-30 2015-02-12 三菱自動車工業株式会社 クランクシャフトの支持構造
WO2015037284A1 (fr) * 2013-09-11 2015-03-19 本田技研工業株式会社 Bloc d'alimentation de véhicule
US20170138254A1 (en) * 2015-11-12 2017-05-18 GM Global Technology Operations LLC Balance shaft disconnect for engine spin loss reduction
WO2018173140A1 (fr) * 2017-03-22 2018-09-27 本田技研工業株式会社 Structure de montage de capteur
WO2018180560A1 (fr) 2017-03-30 2018-10-04 本田技研工業株式会社 Moteur à combustion interne
JP2018168966A (ja) * 2017-03-30 2018-11-01 株式会社スペシャルパーツ武川 クランクシャフトの支持構造
JP2018168827A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 内燃機関
JP2018168826A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 内燃機関
JP2019122892A (ja) 2018-01-12 2019-07-25 三菱重工エンジニアリング株式会社 硫化カルボニルの加水分解用触媒及びその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009057878A (ja) * 2007-08-31 2009-03-19 Yamaha Motor Co Ltd エンジンおよび鞍乗型車両

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57107923U (fr) * 1980-12-22 1982-07-03
JPS63101539A (ja) * 1986-10-16 1988-05-06 Isuzu Motors Ltd 機関のバランスシヤフト駆動装置
JPH0199977U (fr) * 1987-12-23 1989-07-05
JPH04203226A (ja) * 1990-11-28 1992-07-23 Yamaha Motor Co Ltd 自動二輪車の駆動装置
JPH0942053A (ja) * 1995-07-28 1997-02-10 Kubota Corp クランクケース一体型シリンダブロック
JP2001264113A (ja) * 2000-03-14 2001-09-26 Nissan Diesel Motor Co Ltd パルス発生装置
JP2002242756A (ja) * 2001-02-16 2002-08-28 Fuji Heavy Ind Ltd エンジン用ベアリングケース
JP2008223593A (ja) * 2007-03-13 2008-09-25 Yamaha Motor Co Ltd 内燃機関およびそれを備えた車両
JP2009067336A (ja) * 2007-09-18 2009-04-02 Yamaha Motor Co Ltd 自動二輪車
JP2010127265A (ja) * 2008-12-01 2010-06-10 Honda Motor Co Ltd 車両用エンジン
JP2011163249A (ja) * 2010-02-12 2011-08-25 Honda Motor Co Ltd 内燃機関のクランクケース構造
JP2011196250A (ja) * 2010-03-19 2011-10-06 Honda Motor Co Ltd 車速センサ取付構造
JP2012197712A (ja) * 2011-03-22 2012-10-18 Kubota Corp 電子部品のカプラの保護装置
JP2014105626A (ja) * 2012-11-27 2014-06-09 Yamaha Motor Co Ltd 鞍乗り型車両
JP2014163353A (ja) * 2013-02-27 2014-09-08 Honda Motor Co Ltd 鞍乗型車両の回転速センサ取付構造
JP2015028320A (ja) * 2013-07-30 2015-02-12 三菱自動車工業株式会社 クランクシャフトの支持構造
WO2015037284A1 (fr) * 2013-09-11 2015-03-19 本田技研工業株式会社 Bloc d'alimentation de véhicule
US20170138254A1 (en) * 2015-11-12 2017-05-18 GM Global Technology Operations LLC Balance shaft disconnect for engine spin loss reduction
WO2018173140A1 (fr) * 2017-03-22 2018-09-27 本田技研工業株式会社 Structure de montage de capteur
WO2018180560A1 (fr) 2017-03-30 2018-10-04 本田技研工業株式会社 Moteur à combustion interne
JP2018168966A (ja) * 2017-03-30 2018-11-01 株式会社スペシャルパーツ武川 クランクシャフトの支持構造
JP2018168827A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 内燃機関
JP2018168826A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 内燃機関
JP2019122892A (ja) 2018-01-12 2019-07-25 三菱重工エンジニアリング株式会社 硫化カルボニルの加水分解用触媒及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3992441A4

Also Published As

Publication number Publication date
EP3992441A4 (fr) 2022-07-06
EP3992441B1 (fr) 2024-05-08
EP3992441A1 (fr) 2022-05-04

Similar Documents

Publication Publication Date Title
CN110462186B (zh) 内燃机
JP5874527B2 (ja) 自動二輪車の吸気制御装置
US7434645B2 (en) Swing arm structure in motorcycle
WO2021002236A1 (fr) Structure de moteur à combustion interne
CN110475957B (zh) 内燃机
CN111692962B (zh) 发动机的曲轴角检测装置
JP6781347B2 (ja) 内燃機関
CN110475960B (zh) 内燃机
CN110520614B (zh) 内燃机
CN110520613B (zh) 内燃机
JP2017154676A (ja) 鞍乗り型ハイブリッド車両
JP6902072B2 (ja) 車両用パワーユニット
JP2012136996A (ja) 内燃機関用クランク角検出装置
CN110949577B (zh) 鞍乘型车辆的动力单元
CN112739900B (zh) 鞍乘型车辆的动力单元
CN112664293B (zh) 鞍乘型车辆用内燃机
JP6963116B2 (ja) 鞍乗り型車両のパワーユニットのカバー構造
JP6800192B2 (ja) 内燃機関の回転数検出装置
JP2012136997A (ja) 内燃機関用クランク角検出装置
EP3546333B1 (fr) Unité d'alimentation
JP2014118914A (ja) 電子制御スロットル装置
JP2022092220A (ja) エンジン
JP2014029143A (ja) 内燃機関のクランクケースカバー

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20835661

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020835661

Country of ref document: EP

Effective date: 20220201

NENP Non-entry into the national phase

Ref country code: JP