WO2021181547A1 - Dispositif d'admission de moteur à combustion interne pour véhicule de type à selle - Google Patents

Dispositif d'admission de moteur à combustion interne pour véhicule de type à selle Download PDF

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Publication number
WO2021181547A1
WO2021181547A1 PCT/JP2020/010447 JP2020010447W WO2021181547A1 WO 2021181547 A1 WO2021181547 A1 WO 2021181547A1 JP 2020010447 W JP2020010447 W JP 2020010447W WO 2021181547 A1 WO2021181547 A1 WO 2021181547A1
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WO
WIPO (PCT)
Prior art keywords
intake
passage
valve
control valve
internal combustion
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Application number
PCT/JP2020/010447
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English (en)
Japanese (ja)
Inventor
田中　雅人
恭平 廣瀬
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.)
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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 PCT/JP2020/010447 priority Critical patent/WO2021181547A1/fr
Priority to BR112022015806A priority patent/BR112022015806A2/pt
Priority to JP2022507064A priority patent/JP7241235B2/ja
Publication of WO2021181547A1 publication Critical patent/WO2021181547A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an intake device for an internal combustion engine mounted on a vehicle, particularly a saddle-mounted vehicle.
  • an intake control valve is provided on the downstream side of the throttle valve to control the intake supply to one side of the intake passage divided into two to generate a vortex flow such as a tumble flow in the air-fuel mixture in the combustion chamber.
  • the added intake device is shown in, for example, Patent Document 1 below.
  • Patent Document 1 when an internal combustion engine mounted on a saddle-mounted vehicle is provided with an intake control valve such as a tumble control valve in addition to the throttle valve, both valves are provided.
  • the weight of the device increases and the throttle valve is particularly susceptible to vibration, the specific configuration and arrangement of the intake device that provides the vehicle with vibration resistance and heat resistance from the internal combustion engine are shown.
  • a rubber insulator is provided between the throttle valve and the intake pipe, but the throttle valve is not provided with an intake control valve such as a tumble control valve. , Issues and countermeasures when both valves are provided are not shown.
  • the present invention has been made in view of the above-mentioned prior art, and when an internal combustion engine for a saddle-type vehicle is provided with an intake control valve such as a tumble control valve in addition to a throttle valve, the vehicle has earthquake resistance against vibration.
  • An object of the present invention is to provide an intake device capable of obtaining heat resistance to heat from an internal combustion engine.
  • a throttle valve provided in the intake passage through which the intake air to the combustion chamber of the internal combustion engine passes and controlled to an arbitrary opening degree to control the intake air amount, and a throttle valve provided on the downstream side of the throttle valve and along the passage direction.
  • An internal combustion engine for a saddle-type vehicle provided with an intake control valve that opens and closes a passage cross section of the main passage of the intake passage divided into a main passage and a sub passage to control intake supply to the main passage.
  • the intake device of the above at least a part of the intake passage between the throttle body provided with the throttle valve and the intake control valve device provided with the intake control valve is formed, has heat insulating properties, and is combined with the throttle body. It is an intake device for an internal combustion engine for a saddle-type vehicle, which is provided with a connecting pipe having elasticity that allows relative displacement with the intake control valve device.
  • a throttle body equipped with a throttle valve and an intake control valve in an intake device provided in series with a throttle valve and an intake control valve for controlling the intake supply to the main passage of the intake passage divided into a main passage and a sub passage. Since a connecting pipe having heat insulation and elasticity is provided between the intake control valve device and the throttle valve, the earthquake resistance of the throttle valve against vehicle vibration and the heat resistance against heat from the internal combustion engine are improved.
  • the throttle valve actuator is provided at a position overlapping the main frame of the saddle-mounted vehicle, and the throttle body and the intake control valve device are directly connected by the connecting pipe having heat insulation and elasticity. NS.
  • the intake passage length can be suppressed by connecting the throttle body and the intake control valve device only with a connecting pipe having heat insulation and elasticity, and when the main frame is arranged near the rear of the intake port.
  • the throttle valve actuator can be positioned on the side of the main frame and the intake passage can be arranged avoiding the main frame, it is not necessary to lengthen the main frame unnecessarily to secure space for the actuator. Layout is improved.
  • the fuel injection valve is arranged on the upstream side of the intake passage from the connection pipe, and the central axis direction of the fuel injection valve faces the downstream side of the connection pipe on the inner surface of the intake passage. Therefore, at the connection between the inner surface of the ventilation path of the throttle body provided with the throttle valve and the inner surface of the connecting pipe, or at the connecting portion between the inner surface of the connecting pipe and the inner surface of the ventilation path of the intake control valve device provided with the intake control valve. It is possible to prevent fuel from accumulating in the generated step portion.
  • downstream side of the ventilation path of the intake control valve device descends toward the combustion chamber side. Therefore, the dropped fuel injected by the fuel injection valve is guided to the downstream side of the ventilation path, and the backflow of the fuel to the upstream side can be prevented.
  • connection pipe is made of a rubber member, and has a throttle valve side portion connected to the throttle body, an intake control valve side portion connected to the intake control valve device, a throttle valve side portion, and an intake control valve side portion. It is provided with an intermediate portion forming an annular wall formed between the annulus and the annular wall, and the annular wall has a flexible portion. Therefore, the connection pipe made of a rubber member that connects the relatively heavy throttle body to the intake control valve device is provided with an escape allowance due to bending with respect to the load, and the durability can be improved.
  • a throttle body equipped with a throttle valve and an intake control valve in an intake device provided in series with a throttle valve and an intake control valve for controlling the intake supply to the main passage of the intake passage divided into a main passage and a sub passage. Since a connecting pipe having heat insulation and elasticity is provided between the intake control valve device and the throttle valve, the earthquake resistance of the throttle valve against vehicle vibration and the heat resistance against heat from the internal combustion engine are improved.
  • FIG. 1 is a plan sectional view of a central main part of a motorcycle as viewed from the arrow III-III in FIG.
  • FIG. 3 is a right perspective view of the central main part of the motorcycle as viewed from diagonally above on the right side, with the fuel tank, seat, and rear side cover removed, and the periphery of the tumble valve device, throttle body, and connecting tube, as viewed from the IV arrow in FIG. ..
  • FIG. 3 is an elevation cross-sectional view of a central main part of a motorcycle by looking at the arrow VV in FIG.
  • FIG. 5 is an enlarged perspective view of the outer shape of the elastic insulator in FIG.
  • FIGS. 1 to 6 An intake device for an internal combustion engine for a saddle-type vehicle according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
  • the internal combustion engine is mounted on a saddle-mounted vehicle, and in the present embodiment, the saddle-mounted vehicle is a motorcycle.
  • the arrow FR indicates the front of the vehicle
  • LH indicates the left side of the vehicle
  • RH indicates the right side of the vehicle
  • UP indicates the upper part of the vehicle.
  • FIG. 1 is a right side view of the motorcycle 1 according to the embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the right side of the internal combustion engine 3 mounted on the motorcycle 1 in FIG.
  • the body frame 2 of the motorcycle (“saddle-mounted vehicle” in the present invention) 1 extends downward from the head pipe 20 constituting the front end and the head pipe 20 and then curves and extends further downward.
  • One main frame 21 having a hanging portion 21a, a pair of left and right seat rails 22 extending rearward from the curved portion of the main frame 21, and one down extending downward from the head pipe 20 in the center of the vehicle width.
  • a front fork 12 that supports the front wheel 11 is rotatably attached to the head pipe 20, and a fuel tank 13 is attached to the main frame 21.
  • a swing arm 14 is supported on the pivot plate 24 so as to be swingable up and down. Further, the seat 15 and a pair of left and right rear side covers 10a are attached to the seat rail 22.
  • a front cowl 10b equipped with a headlight, a front winker, etc. is supported in front of the head pipe 20.
  • a front fender 10c that covers the front wheel 11 from above is supported at the lower part of the front fork 12.
  • the swing arm 14 rotatably supports the rear wheel 16 at the rear end.
  • the lower end of the rear cushion unit 17 is attached to the rear portion of the swing arm 14, and the upper end of the rear cushion unit 17 is attached near the connection portion between the rear frame 25 and the seat rail 22.
  • Seat 15 is formed into a two-person tandem seat that is long before and after the driver and passengers can sit.
  • a side stand 19 for parking the motorcycle 1 and a center stand (not shown) At the bottom of the pivot plate 24, a side stand 19 for parking the motorcycle 1 and a center stand (not shown), a step 18A on which the driver puts his foot, and a step bracket 18C supporting the pillion step 18B on which the passenger puts his foot, etc. Is attached.
  • An engine hanger 26 is fixed to the lower part of the down frame 23, and the engine hanger 26 and a pair of left and right pivot plates 24 support a power unit 4 having an internal combustion engine 3 and a transmission 5 integrally.
  • the internal combustion engine 3 includes a crankcase 30 that houses the crankshaft 31, and a cylinder portion 32 that is fastened to the upper portion of the crankcase 30 with the cylinder axis X slightly tilted forward.
  • the cylinder portion 32 includes a cylinder block 33, a cylinder head 34, and a head cover 35 from the crankcase 30 side.
  • the internal combustion engine 3 is arranged in a region surrounded by the main frame 21 and the down frame 23 in a side view.
  • the cylinder block 33 is attached to the crankcase 30 so as to stand up with a slight forward inclination, the front portion of the crankcase 30 is supported by the engine hanger 26, and the rear portion of the crankcase 30 is supported by the pivot plate 24.
  • a throttle body 8 is connected to the rear surface of the cylinder head 34 via a tumble valve device (“intake control valve device” in the present invention) 7, and an air cleaner 86 is connected upstream of the throttle body 8 via a connecting tube 85.
  • NS tumble valve device
  • An exhaust pipe 39 is connected to the front surface of the cylinder head 34, and a muffler 40 is connected to the downstream side of the exhaust pipe 39.
  • the air cleaner 86 is arranged in a laterally triangular area surrounded by the seat rail 22, the main frame 21, and the rear frame 25. The upper half of the air cleaner 86 is covered on both the left and right sides with a pair of left and right rear side covers 10a made of a resin material.
  • the rear side cover 10a overlaps a part of the rear part of the fuel tank 13 in a side view, extends rearward from the rear part of the fuel tank 13, extends below the seat 15, and extends to the rear lower end of the seat 15. As shown in FIG. 1, the rear side cover 10a covers the rear lower portion of the fuel tank 13 and the lower edge of the seat 15 invisible to the outside, and the appearance is improved. In addition, the rear side cover 10a covers the outer side of the seat rail 22 in the vehicle width direction, thereby improving the appearance.
  • reference numeral 10d is a rear fender.
  • FIG. 2 is a cross-sectional view of the right side of the power unit 4 taken out and shown in substantially the same orientation as shown in FIG.
  • the cylinder block 33, the cylinder head 34, and the head cover 35 forming the cylinder portion 32 are provided on the crankcase 30 with the cylinder axis X slightly tilted forward as shown in FIG. ing.
  • the left case half body 30L is shown with the mating surface 30b with the right case half body (not shown) facing the front side of the drawing.
  • a transmission 5 having a main shaft 51 and a counter shaft 52 parallel to the crankshaft 31 is provided inside the rear portion of the crankcase 30, a transmission 5 having a main shaft 51 and a counter shaft 52 parallel to the crankshaft 31 is provided inside the rear portion of the crankcase 30, a transmission 5 having a main shaft 51 and a counter shaft 52 parallel to the crankshaft 31 is provided.
  • the rotation of the crankshaft 31 accompanying the operation of the internal combustion engine 3 is transmitted to the main shaft 51 via a speed change clutch (not shown), and is shifted by a speed change gear group (not shown) provided on the main shaft 51 and the counter shaft 52 to counter the counter. It is transmitted to the shaft 52.
  • the counter shaft 52 is an output shaft of the internal combustion engine 3, that is, the power unit 4, and includes a drive sprocket 53 fitted to the left shaft end of the counter shaft 52 and a driven sprocket 54 fitted to the rear wheel shaft 16a.
  • a drive chain 55 is hung between the two, and the rear wheels 16 are driven
  • the piston 36 that reciprocates in the cylinder bore 33a of the cylinder block 33 is connected to the crankpin 31a of the crankshaft 31 by a connecting rod 37.
  • a combustion chamber 38 is formed between the top surface 36a of the piston 36 slidably fitted in the cylinder bore 33a of the cylinder block 33 and the combustion chamber ceiling surface 34a of the cylinder head 34 facing the top surface 36a. Will be done.
  • the internal combustion engine 3 employs a single-cylinder SOHC type two-valve system, and the cylinder head 34 is provided with a valve operating mechanism 9.
  • a head cover 35 is overlapped and covered on the cylinder head 34 so as to cover the valve operating mechanism 9.
  • an endless cam chain (not shown) is provided on one side of the crankcase 30, the cylinder block 33, and the cylinder head 34 in the crankshaft 31 direction (in the present embodiment, the figure). 2 Passing through a cam chain chamber (not shown) provided on the opposite side (not shown), the cam shaft 91 is hung between the cam shaft 91 and the crank shaft 31, and the cam shaft 91 synchronizes with the crank shaft 31 and has a rotation speed of 1/2 of that.
  • the spark plug 88 is inserted from the side opposite to the cam chain chamber (the other side in the direction of the crankshaft 51, the front side shown in FIG. 2 in the present embodiment) toward the inside of the combustion chamber 38 ( (See FIG. 4).
  • the exhaust port 44 and the intake port 43 are separated from each other in the front-rear direction from the exhaust valve port 42 and the intake valve port 41 opened in the combustion chamber ceiling surface 34a, respectively. It is formed by extending while curving in the direction.
  • the upstream end of the intake port 43 is opened toward the rear of the cylinder head 34, and is connected to the tumble valve device (“intake control valve device” in the present invention) 7 with the heat insulating plate member 62 interposed therebetween.
  • the throttle body 8 is connected to the upstream side of the throttle body 8 via an elastic insulator (“connecting pipe” in the present invention) 61.
  • An air cleaner 86 is sequentially connected to the upstream side of the throttle body 8 via a connecting tube 85 (see FIG. 1). That is, the intake air is burned from the air cleaner 86 through the connecting tube 85, the air passage 80 of the throttle body 8, the air passage 60 of the elastic insulator 61, the air passage 70 of the tumble valve device 7, the opening 63 of the heat insulating plate member 62, and the intake port 43.
  • a continuous intake passage 6 that feeds to the chamber 38 is configured.
  • the downstream end of the exhaust port 44 opens toward the front of the cylinder head 34 and is connected to the exhaust pipe 39.
  • the exhaust pipe 39 wraps around below the power unit 4, and then the muffler 40 on the right side of the rear wheel 16 Connect to (see Figure 1).
  • a cylindrical intake valve guide 45 is integrally fitted to the curved outer wall portion 43a of the intake port 43 in the cylinder head 34, and the intake valve 47 slidably supported by the intake valve guide 45 burns the intake port 43.
  • the intake valve port 41 facing the chamber 38 is opened and closed.
  • the exhaust valve 48 slidably supported by the exhaust valve guide 46 integrally fitted to the curved outer wall portion 44a of the exhaust port 44 in the cylinder head 34 faces the combustion chamber 38 of the exhaust port 44. Open and close the mouth 42.
  • the intake valve 47 and the exhaust valve 48 are urged upward by the valve spring 49 so that their umbrella portions 47a and 48a both close the intake valve port 41 and the exhaust valve port 42 facing the combustion chamber 38.
  • the intake cam of the cam shaft 91, the intake rocker arm 93 that swings in contact with the exhaust cam, and the exhaust rocker arm 94 push down the intake valve 47 and the stem ends 47b and 48b of the exhaust valve 48, and the intake valve 47,
  • the exhaust valve 48 opens, and the intake port 43 and the combustion chamber 38 communicate with each other, and the exhaust port 44 and the combustion chamber 38 communicate with each other to perform intake and exhaust at a predetermined timing.
  • a tumble flow T of the fuel / air mixture that is, an intake device for giving vertical rotation in the combustion chamber 38.
  • the throttle body 8 is rotatably supported in the throttle body 8 by a throttle valve shaft 81a oriented substantially horizontally perpendicular to the flow direction F of the air passage 80, that is, the intake passage 6, and is controlled to an arbitrary opening degree. It is provided with a throttle valve 81 that can variably control the passage area of the air passage 80, control the amount of intake air, and open and close the air passage 80.
  • the ventilation passage 70 of the tumble valve device 7 is connected to the downstream side of the throttle valve 81, and is perpendicular to the ventilation passage 70, that is, the flow direction F of the intake passage 6, and substantially horizontal.
  • a tumble control valve (in the present invention) that is rotatably supported in the tumble valve device 7 by a tumble valve shaft (that is, an intake control valve shaft) 71a that is oriented and parallel to the throttle valve shaft 81a and is controlled to an arbitrary opening degree.
  • "Intake control valve" 71 is provided.
  • the intake passage 6 on the downstream side of the tumble control valve 71 is divided into a main passage 6A and a tumble passage 6B as a sub passage by the partition wall 65 along the passage direction, and the upstream end portion 65a of the partition wall 65.
  • a tumble valve shaft 71a of the tumble control valve 71 is provided adjacent to the tumble control valve 71.
  • the tumble control valve 71 provided in the air passage 70 on the downstream side of the throttle valve 81 is a butterfly type, and is bolted and fixed so as to rotate together with the tumble valve shaft 71a and the tumble valve shaft 71a, and is semicircular upward. It has a tumble valve plate (that is, an intake control valve plate) 71b having a shape.
  • the tumble control valve 71 can rotate counterclockwise in the valve opening direction in FIG. 2, and a return spring (not shown) allows the tumble valve plate 71b to be in the tumble valve closing position where the tumble valve plate 71b is in contact with the inner surface 70a of the ventilation path 70. It is urged clockwise to be positioned in the valve closing direction.
  • the throttle valve 81 provided in the intake passage 6 of the throttle body 8, that is, the ventilation passage 80 is also a butterfly type, and is a disk bolted and fixed so as to rotate together with the throttle valve shaft 81a and the throttle valve shaft 81a. It has a shaped throttle valve plate 81b.
  • the throttle valve 81 can rotate clockwise in the drawing of FIG. 2 in the valve opening direction, and the throttle valve plate 81b is positioned at a fully closed position in contact with the inner surface 80a of the ventilation path 80 by a return spring (not shown). It is urged counterclockwise in the valve closing direction.
  • the intake passage 6 is divided into upper and lower parts by a partition wall 65 from the tumble valve device 7 to the intake port 43, and is defined as a lower side (“secondary passage” in the present invention). It is divided into 6B and a main passage 6A excluding the tumble passage 6B.
  • the partition wall 65 includes a tumble valve device side partition wall (that is, an intake control valve device side partition wall) 65A having an upstream end portion 65a, a heat insulating plate member side partition wall 65B, and an intake port side partition wall 65C in succession. Positioned and configured.
  • the cross sections A, B, and C of the tumble passage 6B are changed by the partition wall 65 that runs vertically from the tumble valve device 7 to the intake port 43. That is, at the inlet of the intake port 43 near the upstream end 65a of the partition wall 65, the intake passage 6 is divided into upper and lower parts, so that the intake passage 6 is defined in a substantially semicircular shape on the lower side as shown in the cross section A.
  • the cross section of the intake port side partition wall 65C changes in an arc shape as it advances to the downstream side, and the cross section is formed so as to form a circular cross section as shown in the cross section B. Further, the cross section of the tumble passage 6B to the downstream end of the intake port side partition wall 65C is maintained as a circular cross section as shown in the cross section C.
  • the center line Z of the tumble passage 6B from the cross section B to the cross section C is directed toward between the opening edge 41a of the intake valve port 41 near the exhaust valve port 42 and the umbrella portion 47a of the intake valve 47. It is set to be oriented. It should be noted that the throttle body 8 penetrates the intake passage 6 on the downstream side of the throttle valve 81, that is, the ventilation passage 80 from above and outside, and injects and supplies fuel toward the diagonally downstream side (schematically in FIG. 2). A fuel injection valve 87 arranged as shown in the injection line J) is installed.
  • the intake air flowing through the tumble passage 6B is passed above the umbrella portion 47a of the intake valve 47, and then is inside the cylinder bore 33a from between the intake valve port 41 and the opening edge 41a on the side close to the exhaust valve port 42. Since it can be efficiently flowed into the combustion chamber 38, the tumble flow T can be easily generated in the combustion chamber 38. That is, the tumble passage 6B as the sub-passage serves as an intake flow path for generating the tumble flow T.
  • the tumble control valve 71 is a pair of upper and lower main passages 6A and a main passage 6A of the tumble passages 6B that divide the intake flow in the intake passage 6 on the downstream side of the tumble valve plate 71b provided above.
  • the passage cross section is opened and closed to control the intake air supply to the main passage 6A, and the intake distribution between the main passage 6A of the intake passage 6 and the tumble passage 6B which is a sub passage is controlled. That is, at the closing position of the tumble control valve 71, the tumble valve plate 71b is positioned so as to cover the inlet opening 6Aa of the main passage 6A to close or suppress the inflow of the intake air flow, and the intake air flow is guided to the tumble passage 6B side. , The intake air from the tumble passage 6B flows into the cylinder bore 32a as an air-fuel mixture together with the fuel from the fuel injection valve 87.
  • the throttle valve 81 When the internal combustion engine 3 is in low load operation, the throttle valve 81 is throttled to reduce the intake amount, but the tumble control valve 71 allows most of the intake air to pass through the tumble passage 6B, so that the intake flow velocity flows into the combustion chamber 38. It becomes possible to maintain good fuel combustion in the combustion chamber 38 while strengthening the tumble flow T of the intake air generated in the combustion chamber 38.
  • the tumble flow T shown by the alternate long and short dash line in FIG. 2 schematically shows the tumble flow T in the combustion chamber 38 when the piston 36 descends in the cylinder bore 33a as shown by the alternate long and short dash line. ..
  • the throttle valve 81 opens and the intake air amount increases, but the tumble control valve 71 is rotated in the opening direction to increase the inflow of the intake air flow into the main passage 6A.
  • the throttle valve 81 and the tumble control valve 71 are located parallel to the flow direction F of the intake passage 6 as shown by the two-point chain line in FIG. 2, and the intake flow flowing through the intake passage 6 is tumbled with the throttle valve 81.
  • a sufficient amount of intake air flows to both the main passage 6A and the tumble passage 6B without being disturbed by the control valve 71, and both of them, accompanied by the fuel from the fuel injection valve 87, can be directed to the combustion chamber 38 as an air-fuel mixture. can.
  • the throttle valve 81 is rotated by an engine control unit (ECU) (not shown) that activates the actuator 82 of the throttle valve 81 based on the operation of the driver and the situation of the internal combustion engine 3, and the valve is positioned. , Opening and closing.
  • the actuator 82 is mainly composed of an electric motor, but as shown in FIGS. 2 and 4, the throttle valve shaft 81a and the electric motor shaft, that is, the actuator shaft center 82a are offset, so that between them. Is provided with an appropriate transmission unit 83 such as a gear mechanism (see FIG. 3).
  • the tumble control valve 71 is rotated by an engine control unit (ECU) (not shown) that activates the actuator 72 of the tumble control valve 71 based on the situation of the internal combustion engine 3, and the valve is positioned and opened / closed.
  • the actuator 72 mainly includes an electric motor.
  • FIG. 3 which is a plan sectional view of the central main part of the motorcycle 1 as viewed from the arrow III-III in FIG. 1, in the present embodiment, the intake port 43 opened at the rear portion of the cylinder head 34 is provided with the intake port 43.
  • the tumble valve device 7 is fastened and connected with the heat insulating plate member 62 interposed therebetween.
  • the upstream side of the intake air flow is connected to the throttle body 8 via the elastic insulator 61, and the connecting tube 85 is further connected to the upstream side of the throttle body 8 to be connected to the air cleaner 86.
  • the main body 8a see FIGS.
  • FIG. 3 regarding the throttle body 8, the actuator 82 and the transmission portion 83 to the throttle valve shaft 81a are shown as a cross section, and the main body 8a of the throttle body 8 including the throttle valve 81 is located above the actuator 82. .. Further, regarding the tumble valve device 7, the actuator 72, the air passage 70, and the tumble control valve 71 are shown as cross sections.
  • FIG. 4 the fuel tank 13, the seat 15, and the rear side cover 10a are removed in FIG. 3, and the periphery of the tumble valve device 7, the throttle body 8, and the connecting tube 85 is viewed from diagonally above to the right. It is a right side perspective view of the central main part of the motorcycle 1.
  • the upstream side of the connecting tube 85 connected to the upstream side of the main body 8a of the throttle body 8 provided with the throttle valve 81 is connected to the side surface 86b of the air cleaner 86, that is, the surface facing the vehicle side.
  • the intake passage 6 passing through the tumble valve device 7 and the throttle body 8 becomes long and connecting. If you try to connect the tube 85 to the front side 86a side of the air cleaner 86 as in the past, the distance between the cylinder part 32 and the air cleaner 86 is set too long and the vehicle body becomes large, or the cylinder part 32 and the air cleaner 86 If the connecting tube 85 itself having a pipe portion forming the intake passage 6 between them, or the connection between the tumble valve device 7 and the throttle body 8 is bent and the angle becomes tight, the intake performance may be affected.
  • the connecting tube 85 can be smoothly connected even at a distance between the normal cylinder portion 32 and the air cleaner 86, and the intake air flow becomes smooth and the intake air can be taken. Since it is rectified, the intake performance is improved.
  • the tumble valve device 7 which is fastened and connected to the intake port 43 at the rear of the cylinder head 34 with the heat insulating plate member 62 interposed therebetween and the throttle body 8 are connected as a connecting pipe. It is relay-connected by the elastic insulator 61 of. That is, it constitutes at least a part of the intake passage 6 between the throttle body 8 provided with the throttle valve 81 and the tumble valve device 7 provided with the tumble control valve 71, that is, fluidly relays and has heat insulating properties.
  • an elastic insulator 61 as a connecting pipe having elasticity that allows relative displacement between the throttle body 8 and the tumble valve device 7 is provided.
  • the elastic insulator (“connecting tube” in the present invention) 61 is formed of a rubber member having heat insulating properties and elasticity as a preferable example shown in the present embodiment.
  • the elastic insulator 61 may be a mixture of metal members and resin members as long as it has a member structure having heat insulating properties and elasticity, and another member is connected to the member having heat insulating properties and elasticity to form a connecting tubular structure. It may be the one that has been done.
  • a tumble control valve 71 for controlling the intake air supply to the main passage 6A of the intake passage 6 divided into the main passage 6A and the tumble passage 6B and a throttle valve 81 for controlling the intake air amount are provided in series.
  • the throttle valve 81 of the vehicle is provided with an elastic insulator 61 having heat insulation and elasticity between the throttle body 8 provided with the throttle valve 81 and the tumble valve device 7 provided with the tumble control valve 71. The seismic resistance against vibration and the heat resistance against heat from the internal combustion engine 3 are improved.
  • the tumble valve device 7 and the throttle body 8 are left and right in the intake passage 6 directions.
  • it is slightly inclined, since it is connected by an elastic insulator 61, it can be easily dealt with by forming the ventilation path 60 of the elastic insulator 61 into a curved tubular shape corresponding to it, and the ventilation path of the tumble valve device 7 can be dealt with easily.
  • the 70, the ventilation passage 60 of the elastic insulator 61, and the ventilation passage 80 of the throttle body 8 are smoothly connected, and the intake passage 6 is smoothly configured so as not to interfere with the intake performance.
  • the throttle body 8 and the tumble valve device 7 are directly connected by an elastic insulator 61 having a heat insulating property and elasticity larger than those connecting portions formed of metal members, and thus the connecting portion. Tolerance of accuracy and heat insulation are obtained.
  • the actuator 82 of the throttle valve 81 is provided at a position overlapping with the main frame 21 in the side view. As described above, the length of the intake passage can be suppressed by connecting the throttle body 8 and the tumble valve device 7 only with the elastic insulator 61 having heat insulation and elasticity, and the main frame 21 is located near the rear of the intake port 43.
  • the actuator 82 of the throttle valve 81 can be positioned on the side of the main frame 21, and the intake passage 6 can be arranged so as to avoid the main frame 21.
  • the layout is improved because it is not necessary to lengthen the main frame 21 unnecessarily to secure the space for the actuator 82.
  • FIG. 5 shows the elevation of the central main part of the motorcycle 1 including the intake passage 6 passing through the throttle body 8 and the tumble valve device 7 and the elastic insulator 61 between them according to the VV arrow in FIG. It is a cross-sectional view. Similar to that shown in FIG. 4, the tumble valve device 7 which is fastened and connected to the intake port 43 at the rear of the cylinder head 34 across the heat insulating plate member 62 and the main body 8a of the throttle body 8 are elastic insulators as connecting pipes. It is shown by 61 that it is relayed.
  • the connecting tube 85 is located rearward of the throttle body 8 (left side in the drawing) to the right side (front side in the drawing) from the cross section taken along the line VV in FIG.
  • the connecting tube 85, the air passage 80 of the throttle body 8, the air passage 60 of the elastic insulator 61, the air passage 70 of the tumble valve device 7, the opening 63 of the heat insulating plate member 62, and the intake port 43 form a continuous intake passage 6. It is shown to be configured.
  • the fuel injection valve 87 is arranged on the air passage 80 of the throttle body 8, that is, on the upstream side of the intake passage 6 with respect to the elastic insulator 61.
  • the central axis I direction of the fuel injection valve 87 faces the downstream side of the region of the elastic insulator 61 on the inner surface 6a of the intake passage 6. Due to such a setting, the connection portion 64A between the inner surface 80a of the ventilation path 80 of the throttle body 8 provided with the throttle valve 81 and the inner surface 60a of the ventilation path 60 of the elastic insulator 61, or the ventilation path 60 of the elastic insulator 61. It is possible to prevent fuel from accumulating in the stepped portion generated at the connection portion 64B between the inner surface 60a of the tamble valve device 7 and the inner surface 70a of the ventilation path 70 of the tumble valve device 7 provided with the tumble control valve 71.
  • the air passage 70 of the tumble valve device 7 has a downstream side (right side in the drawing of FIG. 5) descending toward the combustion chamber 38 side. Therefore, the dropped fuel injected by the fuel injection valve 87 is guided to the downstream side of the ventilation passage 70 and further flows down to the intake port 43 to prevent the backflow of the fuel to the upstream side.
  • FIG. 6 is an enlarged perspective view of the outer diameter of the elastic insulator 61 shown in FIG. 5, which is slightly different from the right outer surface view of FIG. 4, but is the same.
  • the elastic insulator 61 is formed of a rubber member having heat insulating properties and elasticity as described above in the present embodiment.
  • a ventilation passage 60 that forms a part of the intake passage 6 and fluidly relays the throttle body 8 and the tumble valve device 7 is formed, and the throttle valve side portion that connects to the downstream nozzle portion 8b of the throttle body 8 is formed.
  • An intermediate portion 61c forming an annular wall formed between 61a, a tumble control valve side portion 61b connected to the upstream nozzle portion 7b of the tumble valve device 7, and a throttle valve side portion 61a and a tumble control valve side portion 61b. And have.
  • the throttle valve side portion 61a is fitted so as to cover the downstream nozzle portion 8b of the throttle body 8, and the outer periphery is fastened and fixed with a binder 61d.
  • the tumble control valve side portion 61b is also fitted so as to cover the upstream nozzle portion 7b of the tumble valve device 7, and the outer circumference is fastened and fixed with a binder 61d.
  • the intermediate portion 61c has a bending portion 67 forming a curved surface R. Therefore, the elastic insulator 61 made of a rubber member that connects the relatively heavy throttle body 8 to the tumble valve device 7 is provided with an escape allowance due to the flexible portion 67 being easily elastically flexed with respect to the load. , Improved durability against vibration. Twice
  • the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the gist thereof, and the scope of the gist of the present invention. It goes without saying that saddle-type vehicles, internal combustion engines, and the like are implemented in various modes. For convenience of explanation, the left-right arrangement of the illustrated embodiment has been described, but even if the left-right arrangement is different, it is included in the present invention as long as it is within the scope of the gist of the invention.
  • 1 motorcycle ("saddle-type vehicle” in the present invention), 2 ... body frame, 3 ... internal combustion engine, 4 ... power unit, 5 ... transmission, 6 ... intake passage, 6a ... inner surface, 6A ... main passage, 6Aa ... entrance opening, 6B ... tumble passage ("secondary passage” in the present invention), 7 ... tumble valve device ("intake control valve device” in the present invention), 8 ... throttle body, 8a ... main body, 20 ... head pipe, 21 ... main frame, 21a ... hanging, 23 ... down frame, 24 ... pivot plate, 26 ... engine hanger, 30 ... crank case, 31 ... crank shaft, 32 ... cylinder part, 33 ... cylinder block, 33a ... cylinder bore, 34 ...
  • connection part, 64B ... Connection part, 65 ... Partition wall, 65a ... Upstream end, 65A ... Tumble valve device side partition Wall (intake control valve device side partition wall), 65B ... Insulation plate member side partition wall, 65C ... intake port side partition wall, 67 ... flexible part, 70 ... ventilation path, 70a ... inner surface, 71 ... tumble control valve (the present invention) "Intake control valve"), 71a ... Tumble valve shaft (intake control valve shaft), 71b ... Tumble valve plate (intake control valve plate), 72 ... Actuator (of tumble control valve 71), 80 ... Vent path, 80a ... Inner surface, 81 ... Throttle valve, 81a ... Throttle valve shaft, 81b ...

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne, dans un moteur à combustion interne pour un véhicule de type à selle, un dispositif d'admission présentant une résistance aux vibrations contre les vibrations du véhicule et une résistance à la chaleur contre la chaleur provenant du moteur à combustion interne dans le cas où le dispositif d'admission a une soupape de commande d'admission, telle qu'une soupape de commande de culbutage, en plus d'une soupape d'étranglement.　Un dispositif d'admission d'un moteur à combustion interne pour un véhicule de type à selle comprend : une soupape d'étranglement 81 qui est disposée dans un passage d'admission 6, à travers laquelle passe l'air d'admission dirigé vers une chambre de combustion 38 d'un moteur à combustion interne 3 et qui est commandée à un degré souhaité d'ouverture pour commander la quantité d'air d'admission ; et une soupape de commande d'admission 71 qui est disposée en aval de la soupape d'étranglement et qui ouvre ou ferme la section transversale d'un passage principal du passage d'admission divisé en un passage principal 6A et un sous-passage 6B dans la direction du passage pour commander l'alimentation de l'air d'admission vers le passage principal. Le dispositif d'admission comprend un tuyau de raccordement 61 qui effectue un relais, de manière fluidique, entre un corps d'étranglement 8 ayant la soupape d'étranglement et un dispositif de soupape de commande d'admission 7 ayant la soupape de commande d'admission, qui a des propriétés d'isolation thermique et qui est élastique de façon à permettre un déplacement relatif entre le corps d'étranglement et le dispositif de soupape de commande d'admission.
PCT/JP2020/010447 2020-03-11 2020-03-11 Dispositif d'admission de moteur à combustion interne pour véhicule de type à selle WO2021181547A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2020/010447 WO2021181547A1 (fr) 2020-03-11 2020-03-11 Dispositif d'admission de moteur à combustion interne pour véhicule de type à selle
BR112022015806A BR112022015806A2 (pt) 2020-03-11 2020-03-11 Dispositivo de admissão de motor de combustão interna para veículo do tipo para conduzir montado em selim
JP2022507064A JP7241235B2 (ja) 2020-03-11 2020-03-11 鞍乗型車両用内燃機関の吸気装置

Applications Claiming Priority (1)

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PCT/JP2020/010447 WO2021181547A1 (fr) 2020-03-11 2020-03-11 Dispositif d'admission de moteur à combustion interne pour véhicule de type à selle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210156347A1 (en) * 2019-11-25 2021-05-27 Miles John Zock System for enhancing performance of carburetor engine and peripherals of an all-terrain vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117317A (ja) * 1981-12-29 1983-07-12 Yamaha Motor Co Ltd ４サイクルエンジンの吸気装置
JPS6065371U (ja) * 1983-10-09 1985-05-09 ヤマハ発動機株式会社 エンジンの吸気装置
JP2008215292A (ja) * 2007-03-07 2008-09-18 Honda Motor Co Ltd インシュレータ構造
JP2010084633A (ja) * 2008-09-30 2010-04-15 Keihin Corp 燃料噴射弁付きスロットルボディ
JP2012207543A (ja) * 2011-03-29 2012-10-25 Honda Motor Co Ltd 鞍乗型車両

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5266145B2 (ja) * 2009-06-09 2013-08-21 株式会社ケーヒン エンジンの吸気制御装置
JP6065371B2 (ja) 2012-02-06 2017-01-25 セイコーエプソン株式会社 液体消費装置
JP6000785B2 (ja) * 2012-09-28 2016-10-05 本田技研工業株式会社 内燃機関の吸気装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117317A (ja) * 1981-12-29 1983-07-12 Yamaha Motor Co Ltd ４サイクルエンジンの吸気装置
JPS6065371U (ja) * 1983-10-09 1985-05-09 ヤマハ発動機株式会社 エンジンの吸気装置
JP2008215292A (ja) * 2007-03-07 2008-09-18 Honda Motor Co Ltd インシュレータ構造
JP2010084633A (ja) * 2008-09-30 2010-04-15 Keihin Corp 燃料噴射弁付きスロットルボディ
JP2012207543A (ja) * 2011-03-29 2012-10-25 Honda Motor Co Ltd 鞍乗型車両

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210156347A1 (en) * 2019-11-25 2021-05-27 Miles John Zock System for enhancing performance of carburetor engine and peripherals of an all-terrain vehicle
US11624343B2 (en) * 2019-11-25 2023-04-11 Zoom Zoom Parts Llc System for enhancing performance of carburetor engine and peripherals of an all-terrain vehicle

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JPWO2021181547A1 (fr) 2021-09-16
BR112022015806A2 (pt) 2022-10-11
JP7241235B2 (ja) 2023-03-16

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