WO2013108720A1 - Fuel supply device for internal combustion engine - Google Patents

Fuel supply device for internal combustion engine Download PDF

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Publication number
WO2013108720A1
WO2013108720A1 PCT/JP2013/050445 JP2013050445W WO2013108720A1 WO 2013108720 A1 WO2013108720 A1 WO 2013108720A1 JP 2013050445 W JP2013050445 W JP 2013050445W WO 2013108720 A1 WO2013108720 A1 WO 2013108720A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
intake pipe
pipe member
supply device
fuel supply
Prior art date
Application number
PCT/JP2013/050445
Other languages
French (fr)
Japanese (ja)
Inventor
加藤　裕史
友也 佐藤
Original Assignee
株式会社ミクニ
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 株式会社ミクニ filed Critical 株式会社ミクニ
Priority to CN201380006062.7A priority Critical patent/CN104066970B/en
Priority to BR112014017402A priority patent/BR112014017402A8/en
Priority to IN5757DEN2014 priority patent/IN2014DN05757A/en
Publication of WO2013108720A1 publication Critical patent/WO2013108720A1/en
Priority to PH12014501644A priority patent/PH12014501644B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/046—Arrangements for driving diaphragm-type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/02—Pumps peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/002—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for driven by internal combustion engines

Definitions

  • the present invention relates to a fuel supply device for an internal combustion engine that pressurizes fuel in a fuel tank to a pressure that can be injected into the internal combustion engine.
  • This fuel injection uses a fuel supply device composed of a pump unit and a drive unit that drives the pump unit, pressurizes fuel from the fuel tank, and leads it to an engine (corresponding to an internal combustion engine). is there.
  • a pump unit and a drive unit on an intake pipe member that forms a part of an intake pipe of an engine so that fuel can be supplied from the vicinity of a fuel injection position.
  • a pump unit as disclosed in Patent Document 1 is attached so as to stand up along the radial direction of the intake pipe member, and a motor unit (a drive unit is attached to the end of the standing pump unit).
  • a suction connection port body receiving fuel from the fuel tank
  • a return fuel connection port body disharging return fuel
  • the motor part (corresponding to the drive part) is attached so as to project to one side in the radial direction intersecting the intake pipe member, and the pump part is assembled to the projecting end of the motor part, and the motor part is used for suction.
  • a structure in which a connection port body and a return fuel connection port body are provided is used.
  • each of the fuel supply devices disclosed in Patent Document 1 and Patent Document 2 has a problem in weight balance around the intake pipe member, and has low vibration resistance against vibration and impact transmitted from the intake pipe member.
  • the fuel supply device of Patent Document 1 has a layout in which a pump portion, a motor portion, a suction connection port body, and a return fuel connection port body project to one side in the radial direction of the intake pipe member.
  • a heavy motor portion is disposed at a point farthest from the intake pipe member, a rotational moment centering on the intake pipe member is likely to occur in the fuel supply device due to a weight deviation.
  • the suction connection port and the return fuel connection port are subjected to the weight of a hose member extending from the fuel tank and a stopper for stopping the hose member. Tends to increase, and a rotational moment tends to occur. For this reason, the fuel supply device lacks weight balance and is likely to shake with respect to vibration (engine vibration, running vibration, etc.) and impact transmitted from the intake pipe member.
  • An object of the present invention is to provide a fuel supply device for an internal combustion engine that has a simple structure and can improve vibration resistance against vibration and impact transmitted from an intake pipe member.
  • a fuel supply device includes a pump unit that pressurizes fuel, a drive unit that drives the pump unit, and a suction connection port body that guides sucked fuel to the pump unit. And a return connection port that discharges return fuel from the pump portion, and the pump portion is disposed on the outer peripheral portion of the intake pipe member that forms part of the intake pipe of the internal combustion engine, in the axial direction of the intake pipe member. Is provided with a drive part at one end of the pump part that intersects the intake pipe member, and a suction connection body and a return connection body at the other end of the intersecting pump part. It is characterized by that.
  • a heavy drive unit is arranged at one end of the pump unit, and a suction connection port connected to a hose member extending from the fuel tank and a return connection port are arranged at the other end on the opposite side.
  • the pump unit uses a configuration having a cylindrical plunger type pump unit that pressurizes fuel by reciprocating movement of the plunger, and the drive unit has a motor unit that reciprocates the plunger.
  • a plunger-type pump part is supported on the outer periphery of the intake pipe member so that the axial direction of the pump part intersects with the axial direction of the intake pipe member, and the plunger-type pump part intersected with the intake pipe member
  • a motor portion is provided at one end of the suction pump, and a suction connection port body and a return connection port body are provided at the other end portion of the intersecting plunger type pump portion.
  • the motor part is arranged in an approximately L shape from one end of the plunger type pump part along the circumferential direction of the intake pipe member, and the center of gravity of the motor part is brought close to the intake pipe member. It is characterized by that.
  • the plunger-type pump portion has a pressure regulator that maintains the discharged fuel at a predetermined pressure on the other end side where the suction connection port body and the return connection port body are disposed. .
  • the invention according to claim 5 is characterized in that the motor part and the plunger type pump part are respectively arranged closest to the outer peripheral part of the intake pipe member.
  • the invention according to claim 6 is characterized in that the motor part and the plunger type pump part are arranged on a circular locus centering on the axis of the intake pipe member.
  • an injector for injecting fuel pressurized by the plunger type pump part into the intake pipe member, and further comprising a support part for supporting the plunger type pump part and the motor part on the intake pipe member.
  • the injector is disposed at an intermediate portion of the plunger-type pump portion that intersects the intake pipe portion, and is installed so as to be able to inject into the intake pipe portion.
  • the support portion includes a plunger-type pump portion and an intake pipe member opposite to the injector. It is characterized by having a stop part that connects between the parts that intersect with each other, and an anti-sway part that suppresses the shake with the plunger pump of the motor part as a fulcrum.
  • the invention according to claim 8 is characterized in that the plunger type pump unit has a diaphragm type pump unit that assists the suction of the plunger type pump unit.
  • the fuel supply device not only distributes the weight of the pump portion to both sides around the intake pipe member, but also when the fuel supply device is installed in a vehicle such as a motorcycle.
  • the other end portion of the body is added with the weight of a hose member connected to these connection port bodies and a stopper for stopping the hose member.
  • the other end side of the pump part having the mouth and the one end side of the pump part having the driving part are easily balanced in weight. Thereby, the shake of a pump part and a drive part is suppressed only by restraint with the hose member extended from a fuel tank.
  • the fuel supply device has a simple structure in which the pump unit, the drive unit, the suction connection port body, and the return connection port body are arranged in a balanced manner, improving vibration resistance against vibrations and shocks transmitted from the intake pipe member, In other words, it is possible to improve vibration resistance in a state where the vehicle is installed in a vehicle such as a motorcycle.
  • the vibration resistance in the fuel supply device using the plunger type pump unit which is difficult to ensure the weight balance with a simple structure, can be improved.
  • the cylindrical plunger-type pump part has its center of gravity approaching the intake pipe member due to the transverse crossing arrangement, and the pump part itself is also difficult to shake, so the overall vibration resistance of the fuel supply device increases. .
  • the heavy motor part since the heavy motor part is brought close to the intake pipe member, the position of the center of gravity of the motor part approaches the intake pipe member. Thereby, the rotational moment centering on the intake pipe member generated in the plunger type pump part is suppressed, and the fuel supply device is more difficult to shake.
  • the heavy pressure regulator is disposed on the other end side of the plunger-type pump having the suction connection port body and the return connection port body, so that the opposite side (motor part) ) And weight. As a result, the fuel supply device becomes more difficult to shake by utilizing the pressure regulator.
  • the rotational moment generated in the motor part and plunger type pump part centering on the intake pipe member is suppressed, and the fuel supply device becomes more difficult to shake.
  • each part of the fuel supply device is more difficult to shake.
  • the injector is installed, and the stop portion and the motor portion which connect the portion where the plunger-type pump portion intersects the intake pipe portion are shaken.
  • the entire fuel supply device can be firmly fixed to the intake pipe portion with a simple structure that only uses the restraining stop portion.
  • the suction function of the plunger-type pump section is enhanced, and the fuel in the fuel tank can be properly supplied to the injector from any fuel tank.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. Sectional drawing which shows the plunger type pump part, diaphragm type pump part, suction connection port body, return connection port body, a pressure regulator, and a motor part (part) along the BB line in FIG.
  • FIG. 1 is a side view (schematic) of a vehicle, for example, a motorcycle, on which a fuel supply device to which the present invention is applied is installed.
  • An arrow F in FIG. 1 indicates the front direction of the motorcycle, and an arrow R indicates the rear direction of the motorcycle.
  • the motorcycle shown in FIG. 1 has a main frame member extending in the front-rear direction, for example, a main tube member 1 (only a part is shown).
  • a front wheel 5 is suspended from a front end of the main tube member 1 via a front fork 3
  • a rear wheel 9 is suspended from a rear end of the main tube member 1 via a swing arm member 7.
  • the fuel tank 11 and the seat 12 are installed on the main tube member 1 in order from the front side.
  • An acceleration / deceleration system (not shown) such as a brake pedal and a throttle grip is provided on one side (right side) sandwiching the main tube member 1, and a speed change system (not shown) such as a clutch lever and shift pedal is provided on the opposite side (left side). ) Is provided.
  • an internal combustion engine for example, a single-cylinder reciprocating engine 13 (hereinafter simply referred to as the engine) in which a piston 13a is reciprocally moved. 13) is installed.
  • a short pipe member 15 corresponding to an intake pipe member of the present application
  • a throttle valve device 17 are sequentially connected to the side portion of the engine 13, and these include an intake port (not shown) of the engine 13 and an air cleaner (not shown).
  • An intake pipe that communicates with each other is configured.
  • the short pipe member 15 is provided with a fuel supply device 21 together with an electronically controlled injector 19, and these can inject fuel into the short pipe member 15.
  • the perspective view of FIG. 2 shows the entire fuel supply device 21 and the internal structure (dotted line portion), and the exploded perspective view of FIG. 3 shows the fuel supply device 21 removed from the short tube member 15. 4 and 5, the respective parts of the fuel supply device 21 (cross sections taken along lines AA and BB in FIG. 2) are shown.
  • the fuel supply device 21 will be described with reference to FIGS. 2 to 5.
  • the fuel supply device 21 includes a pump unit 25, a drive unit 27 that drives the pump unit 25, and tubular suction ports that are various connection ports.
  • a connection port body 29 and a return connection port body 31 are provided.
  • the pump unit 25 and the drive unit 27 are separate bodies.
  • the pump unit 25, the drive unit 27, and the connection port bodies 29 and 31 are disposed on the outer peripheral portion of the short tube member 15.
  • the pump unit 25 and the drive unit 27 will be described.
  • the pump unit 25 has a cylindrical pump body 33 as shown in FIGS. 2 and 5.
  • the pump main body 33 has a split structure divided into two in the axial direction.
  • Reference numerals 33a and 33b denote divided main body portions and lid portions.
  • the pump unit 25 includes a plunger-type pump unit 35 that houses various pump parts along the axial direction of the pump body 33.
  • This plunger type pump part 35 has a diaphragm type pump part 49 on one end side sandwiching the pump parts of the plunger type pump part 35 and a pressure regulator 61 on the other end side, and is configured in a short cylinder shape. (Figs. 2 and 3).
  • the plunger-type pump unit 35 has a cylindrical sleeve 37 incorporated along the axial direction of the pump body 33 with one end portion as a suction side and the other end portion as a discharge side.
  • the sleeve 37 is configured to include a cylindrical plunger 39 that is reciprocally movable, a suction valve 41 that is assembled in the lumen of the plunger 39, and a discharge valve 43 that is assembled on the discharge side of the sleeve 37.
  • the plunger pump unit 35 guides the fuel (suction fuel) in the plunger 39 to the pressurizing chamber 45 formed at the sleeve end through the suction valve 41, and adds the fuel in the heating chamber 45. It has a structure in which pressurized and pressurized fuel is discharged from the discharge valve 43.
  • the injector 19 is assembled to the pump body 33 of the plunger type pump unit 35.
  • the diaphragm pump 49 includes a diaphragm chamber 51 formed on the suction side of the sleeve 37, a diaphragm 53 provided so as to close the diaphragm chamber 51, and a central portion of the diaphragm 53 at the end of the plunger 39.
  • a columnar fixing tool 55 to be fixed and a suction valve 57 communicating with the diaphragm chamber 51 through a passage 57a are provided.
  • the diaphragm type pump unit 49 amplifies the diaphragm 51, and sucks fuel from the suction valve 57 and guides it into the plunger 39 by the pumping operation in the diaphragm chamber 51 caused by the amplitude.
  • the diaphragm type pump unit 49 assists the insufficient suction function of the plunger type pump unit 35.
  • the diaphragm chamber 51 also communicates with a return fuel discharge valve 59 through a passage 59a.
  • the pressure regulator 61 has a structure in which a discharge chamber 63 formed on the outlet side of the discharge valve 43 is closed with a diaphragm 67 with a relief valve 65 and the diaphragm 67 is pressed by a spring member 69. It is used. That is, in the pressure regulator 61, when the discharge fuel in the discharge chamber 63 is kept at a predetermined pressure due to the displacement of the diaphragm 67 and becomes an excessive fuel pressure, the pressure is applied to the spring chamber 71 containing the spring member 69 through the relief valve 65. Of fuel is released.
  • the discharge chamber 63 communicates with the inlet portion of the injector 19 through a passage 19a and a connection port portion 33c (a portion where the base portion of the injector 19 fits) formed in the pump body 33 described later. The fuel is supplied to the injector 19.
  • a cylindrical motor unit 27 a in which a DC motor 75 is housed in a cylindrical motor case 73 is used.
  • a cam mechanism 77 conversion mechanism that converts rotational motion into reciprocating motion is built in the end of the motor case 73 where the output shaft of the DC motor 75 is disposed.
  • the cam mechanism 77 is configured, for example, by assembling an eccentric cam 79 to the output shaft of the DC motor unit 75 and fitting a frame-shaped cam receiving member 81 to the eccentric cam 79. Converts eccentric rotational motion to reciprocating motion.
  • the output portion of the cam receiving member 81 is disposed on the end portion of the motor case 73, here on the side portion perpendicular to the axial direction of the motor portion 27a.
  • the cylindrical pump unit 25, the cylindrical drive unit 27, and the connection ports 29 and 31 are assembled to the motorcycle so that sufficient vibration resistance is ensured in the installed state.
  • the layout of each part of the fuel supply device 21 is devised.
  • the pump portion 25 is arranged so as to intersect the axial direction of the short tube member 15, and one end portion of the pump portion 25 intersecting the short tube member 15. Is provided with a motor part 27a (drive part 27), and a suction connection port body 29 and a return connection port body 31 are provided at the other end of the pump part 25 on the opposite side.
  • the intermediate portion (axial direction) of the pump portion 25 is disposed on the upper portion of the outer peripheral portion of the short tube member 15 so as to cross the axial direction of the short tube member 15. Is done.
  • the cylindrical plunger-type pump unit 35 is arranged in a lateral direction in which the axial center direction of the plunger-type pump unit 35 and the axial center direction of the short tube member 15 intersect each other, for example, orthogonally intersect with each other. It is attached to the pipe member 15 (arrangement with a low center of gravity).
  • the plunger-type pump part 35 is closest to the outer peripheral part of the short tube member 15 and is arranged at the lowest center of gravity as much as possible.
  • the motor portion 27 a has a side portion of the motor case 73 having the output portion of the cam mechanism 75 so that the driving force is transmitted from the motor portion 27 a to the plunger 39. It is connected to the end of the pump body 33 having an input section.
  • the entire motor unit 27 a is arranged along the downward direction, and is arranged in a different vertical direction from the plunger pump unit 35. With this layout, the entire pump part 27 a is arranged in a substantially L shape along the circumferential direction of the outer peripheral part of the intake pipe member 25, and the position of the center of gravity of the motor part 27 a is brought close to the intake pipe member 25. Note that the motor portion 27 a is closest to the outer peripheral portion of the short tube member 15.
  • the suction connection port body 29 and the return connection port body 31 are end portions of the plunger type pump unit 35 (pump unit 25) opposite to the motor unit 27a. It is formed integrally with the end surface of (lid portion 33b) and protrudes forward from the end surface. Of these, the suction connection port body 29 communicates with the suction valve 57.
  • a fuel supply hose member 85 (only a part of which is shown by a two-dot chain line) extending from the lower part of the fuel tank 11 is connected to the suction connection port body 29 with a stopper 86 such as a hose band (two in FIG. 4). Connected by a dotted line).
  • a stopper 86 such as a hose band (two in FIG. 4).
  • the return connection port body 31 communicates with the discharge valve 59.
  • a return hose member 87 (only part of which is shown by a two-dot chain line) extending from the fuel tank 11 is connected to the return connection port 31 by a stopper 88 such as a hose band.
  • the fuel supply device 21 When the fuel supply device 21 configured as described above is installed in a motorcycle (FIGS. 1 and 2), the fuel supply device 21 exhibits considerable vibration resistance by itself only with the layout of each part. That is, as shown in FIGS. 1 and 2, the weight of the plunger-type pump unit 35 (pump unit 25) is distributed to the left and right sides around the short pipe member 15 that intersects with the pump unit 35. In a state where the fuel supply device 21 is installed in the motorcycle, the motor portion 27a is disposed on one end side of the plunger-type pump portion 35 (pump portion 25), so that the weight balance seems to deteriorate.
  • the weight of the suction connection port body 29 and the return connection port body 31 is added to the other end portion of the plunger-type pump unit 35 (pump unit 25), and the plunger connection unit 29 is connected to the connection port bodies 29 and 31.
  • the weights of the hose members 85 and 87 (down from the fuel tank 11) and stoppers 86 and 88 for stopping the hose members 85 and 87 are added. Therefore, it becomes easy to balance in weight with the opposite one end side where the heavy motor part 27a is arranged. This is because the position of the plunger type pump part 35 (pump part 25) intersecting with the short pipe member 15 is determined at a point where a weight balance is easily obtained. Due to this weight balance, the swing of the plunger type pump part 35 and the motor part 27 a can be suppressed only by restraint by the hose members 85 and 87 extending from the fuel tank 11.
  • the fuel supply device 21 has a simple structure in which the plunger pump 35 (pump unit 25), the motor unit 27a (drive unit 27), the suction connection port body 29, and the return connection port body 31 are arranged in a balanced manner.
  • the vibration resistance against vibrations and impacts transmitted from the short tube member 15 can be improved under the condition of being mounted on a motorcycle.
  • Securing the vibration resistance is effective for the fuel supply device 21 configured using the cylindrical plunger pump unit 35 and the heavy motor unit 27a, which makes it difficult to ensure the weight balance.
  • the cylindrical plunger type pump unit 35 is disposed sideways, so that the position of the center of gravity is lowered, and the plunger type pump unit 35 as a whole is difficult to shake (relative to the vertical direction).
  • the vibration resistance of the entire 21 can be further increased.
  • the motor portion 27a is arranged in an approximately L shape along the circumferential direction of the short tube member 15, so that the position of the center of gravity of the motor portion 27a also approaches the short tube member 15 and the rotational moment about the short tube member 15 is obtained. Therefore, it is difficult for the fuel supply device 21 to shake, and the vibration resistance can be further improved.
  • the fuel supply device 21 has the weight of the pressure regulator 61 as well as the plunger. Since it is added to the other end of the pump section 35 (pump section 25), it becomes easier to balance the weight with the opposite side (motor section 27a). That is, the fuel supply device 21 as a whole becomes more difficult to shake by using the pressure regulator 61, and the vibration resistance is improved.
  • the fuel supply device 21 has a plunger type centered on the short pipe member 15 when the plunger type pump part 35 and the motor part 27a are arranged at points closest to the outer peripheral part of the short pipe member 15, respectively. Since the rotational moment generated in the pump part 35 and the motor part 27a is suppressed, the fuel supply device 21 becomes more difficult to shake and the vibration resistance is improved.
  • the plunger-type pump unit 35 and the motor unit 27 a are arranged on a circular locus closest to the outer peripheral portion of the short tube member 15 centering on the axis of the short tube member 15.
  • the vibration of each part of the fuel supply device 21 around the short tube member 15 is effectively suppressed, and the vibration resistance is effectively enhanced.
  • the fuel supply device 21 when the diaphragm pump unit 37 is provided in the fuel supply device 21, the insufficient suction function of the plunger pump unit 35 is enhanced, so that the fuel supply device 21 is located at a position considerably higher than the fuel supply device 21.
  • the fuel supply device 21 as shown in FIG. 1 can reliably supply fuel even in a vehicle that is substantially at the same height as the lower portion of the fuel tank 11. Regardless of the mounting position, the fuel in the fuel tank 11 can be properly supplied to the injector 19. That is, the fuel supply device 21 having high vibration resistance and high wearability can be provided.
  • the fuel supply device 21 is fixed by using the injector 19 assembled to the plunger type pump unit 35 and simply using the support unit 91 as a plunger type pump.
  • a simple structure is sufficient in which the portion 35 and the motor portion 27a are stopped by the short pipe member 15.
  • the injector 19 has an intermediate portion (intersection portion) of the plunger-type pump portion 35 that intersects the intake pipe portion 15, that is, one end side and the other end portion of the plunger-type pump portion 35. It is disposed at an intermediate portion where the side is substantially balanced in weight, and is attached in an oblique direction by connecting the tip injection portion 19a to the intake pipe portion 15 in communication.
  • a connecting port 33c (only a part of which is shown in FIGS. 2 and 3) is provided in the middle part (axial direction) of the pump body 33 so that the base of the injector 19 can be inserted and removed.
  • the wall portion of the short tube member 15 is provided with a tip support portion 15a (only part of which is shown in FIGS. 2 and 3) into which the injection portion 19a of the injector 19 is removably fitted.
  • the support portion 91 includes a stop portion 93 that connects portions where the plunger-type pump portion 35 and the short tube member 15 on the opposite side of the injector 19 intersect, and a plunger-type pump portion.
  • the anti-sway part 97 is configured to suppress the shake of the motor part 27a with the shaft center of 35 as a fulcrum.
  • the stop portion 93 is provided with, for example, a plate-like bracket portion 95 protruding from the outer peripheral portion of the intermediate portion of the pump main body 33, a base-like mounting seat 98 provided on the outer peripheral portion of the short tube member 15, and a bolt The bracket portion 95 is fastened to the mounting seat 98 by screwing the member 99.
  • the steadying portion 97 is provided with, for example, a pin portion 101 in parallel with the side portion of the motor portion 27 a adjacent to the short tube member 15, and the pin portion 101 is provided on the outer peripheral portion of the short tube member 15.
  • a structure is used in which a pin receiving seat 103 is provided, and the pin portion 101 is inserted into a pin hole 103 a formed in the pin receiving seat 103 when the plunger pump portion 35 is attached.
  • the directions of the bracket portion 95, the screw hole 98a of the mounting seat 98, the pin portion 101, and the pin hole 103a are all set to the same oblique direction as the assembly direction (oblique direction) of the injector 19.
  • the entire fuel supply device 21 is restrained by “installation of the injector 19 in the horizontal movement of the plunger-type pump part 35” and “fixed in the vertical movement of the plunger-type pump part 35 by bolting (retaining prevention). )
  • the pin portion 101 can be firmly fixed with a simple structure in which the number of fixing points,“ suppression of vibration (front-rear direction) of the motor portion 27a with the plunger pump portion 27a as a fulcrum ”, is suppressed to a minimum number.
  • the present invention is not limited to one embodiment, and various modifications may be made without departing from the spirit of the present invention.
  • the example in which the fuel supply device is provided in the short pipe member (the intake pipe member that constitutes a part of the intake pipe) separate from the throttle valve device has been described.
  • a fuel supply device may be provided in the valve body (intake pipe member constituting a part of the intake pipe) of the valve device, and even in this case, the same effect as in the embodiment can be obtained.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

This fuel supply device is configured by: supporting a pump unit (35) so as to intersect the axial center direction of an intake pipe member (15), on the outer circumferential section of the intake pipe member configuring part of an intake pipe; providing a drive unit (27a) on one end section of the pump unit intersecting the intake pipe member; and providing an intake connection port (29) and a return connection port (31) on the other end section.

Description

内燃機関の燃料供給装置Fuel supply device for internal combustion engine
　本発明は、燃料タンク内の燃料を内燃機関へ噴射可能な圧力に加圧する内燃機関の燃料供給装置に関する。 The present invention relates to a fuel supply device for an internal combustion engine that pressurizes fuel in a fuel tank to a pressure that can be injected into the internal combustion engine.
　自動二輪車では、インジェクタを用いて燃料を噴射する方式が普及している。この燃料噴射は、ポンプ部と、同ポンプ部を駆動する駆動部とから構成される燃料供給装置を用い、燃料タンク内からの燃料を加圧して、エンジン（内燃機関に相当）へ導くものである。近時では、燃料噴射位置の近くから燃料の供給が行えるよう、エンジンの吸気管の一部をなす吸気管部材にポンプ部、駆動部を配置する傾向にある。 In motorcycles, a method of injecting fuel using an injector is widespread. This fuel injection uses a fuel supply device composed of a pump unit and a drive unit that drives the pump unit, pressurizes fuel from the fuel tank, and leads it to an engine (corresponding to an internal combustion engine). is there. Recently, there is a tendency to arrange a pump unit and a drive unit on an intake pipe member that forms a part of an intake pipe of an engine so that fuel can be supplied from the vicinity of a fuel injection position.
　多くの燃料供給装置では、特許文献１に開示されているようなポンプ部を吸気管部材の径方向に沿って起立するように取り付け、この起立したポンプ部の端部にモータ部（駆動部に相当）を組み付け、同ポンプ部の端部に吸込用接続口体（燃料タンクからの燃料を受ける）、リターン燃料接続口体（リターン燃料を吐出する）を設ける構造や、特許文献２に開示されているようなモータ部（駆動部に相当）を、吸気管部材と交差する径方向片側へ張り出るように取り付け、このモータ部の張り出た端部にポンプ部を組み付け、モータ部に吸込用接続口体、リターン燃料接続口体を設ける構造が用いられる。 In many fuel supply apparatuses, a pump unit as disclosed in Patent Document 1 is attached so as to stand up along the radial direction of the intake pipe member, and a motor unit (a drive unit is attached to the end of the standing pump unit). And a structure in which a suction connection port body (receiving fuel from the fuel tank) and a return fuel connection port body (discharging return fuel) are provided at the end of the pump unit, and disclosed in Patent Document 2 The motor part (corresponding to the drive part) is attached so as to project to one side in the radial direction intersecting the intake pipe member, and the pump part is assembled to the projecting end of the motor part, and the motor part is used for suction. A structure in which a connection port body and a return fuel connection port body are provided is used.
実開平　４－５４９７４号公報Japanese Utility Model Publication No. 4-54974 特開２００５－１０５９８７号公報JP 2005-105987 A
　こうした燃料供給装置は、モータ部、ソレノイド部など重量の有る駆動部を有するので、吸気管部材から伝わるエンジン振動や走行振動や衝撃を受けやすい。
　ところが、特許文献１及び特許文献２に開示された燃料供給装置は、いずれも吸気管部材を中心とした重量バランスに問題があり、吸気管部材から伝わる振動や衝撃に対する耐振性が低い。 Since such a fuel supply device has a heavy drive unit such as a motor unit and a solenoid unit, the fuel supply device is easily subjected to engine vibration, running vibration, and impact transmitted from the intake pipe member.
However, each of the fuel supply devices disclosed in Patent Document 1 and Patent Document 2 has a problem in weight balance around the intake pipe member, and has low vibration resistance against vibration and impact transmitted from the intake pipe member.
　すなわち、特許文献１の燃料供給装置は、吸気管部材の径方向片側へ、ポンプ部、モータ部、吸込用接続口体およびリターン燃料接続口体が張り出たレイアウトとなる。特に吸気管部材から最も離れた地点には、重量の有るモータ部が配置されるため、重量の偏りを要因に、燃料供給装置には、吸気管部材を中心とした回転モーメントが生じやすい。しかも、燃料供給装置を自動二輪車に設置した状態になると、吸込用接続口体およびリターン燃料接続口体には、燃料タンクから延びるホース部材や同ホース部材を止める止め具の重量が加わるため、重量の偏りは大きくなる傾向にあり、回転モーメントが生じやすい。このため、同燃料供給装置は、重量的なバランスに欠け、吸気管部材から伝わる振動（エンジン振動や走行振動など）や衝撃に対し振れやすい。 That is, the fuel supply device of Patent Document 1 has a layout in which a pump portion, a motor portion, a suction connection port body, and a return fuel connection port body project to one side in the radial direction of the intake pipe member. In particular, since a heavy motor portion is disposed at a point farthest from the intake pipe member, a rotational moment centering on the intake pipe member is likely to occur in the fuel supply device due to a weight deviation. Moreover, when the fuel supply device is installed in the motorcycle, the suction connection port and the return fuel connection port are subjected to the weight of a hose member extending from the fuel tank and a stopper for stopping the hose member. Tends to increase, and a rotational moment tends to occur. For this reason, the fuel supply device lacks weight balance and is likely to shake with respect to vibration (engine vibration, running vibration, etc.) and impact transmitted from the intake pipe member.
　特許文献２の燃料供給装置も、吸気管部材の径方向片側から、重量の有るモータ部、ポンプ部、吸込用接続口体およびリターン燃料接続口体が張り出してレイアウトされるので、特許文献１と同様、燃料供給装置は、重量の偏り（重量的なバランスの悪さなど）から、吸気管部材を中心とした回転モーメントが生じやすく、吸気管部材から伝わる振動や衝撃に対し振れやすい。
　そこで、本発明の目的は、簡単な構造で、吸気管部材から伝わる振動や衝撃に対する耐振性の向上を図ることができる内燃機関の燃料供給装置を提供することにある。 Since the fuel supply device of Patent Document 2 is also laid out with a heavy motor portion, pump portion, suction connection port body, and return fuel connection port body from one side in the radial direction of the intake pipe member, Similarly, the fuel supply device tends to generate a rotational moment centered on the intake pipe member due to weight imbalance (such as poor weight balance), and is likely to shake due to vibration and impact transmitted from the intake pipe member.
SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel supply device for an internal combustion engine that has a simple structure and can improve vibration resistance against vibration and impact transmitted from an intake pipe member.
　上記目的を達成するため、請求項１の発明に係る燃料供給装置は、燃料の加圧を行うポンプ部と、ポンプ部を駆動する駆動部と、ポンプ部へ吸込燃料を導く吸込用接続口体と、ポンプ部からのリターン燃料を吐出するリターン用接続口体とを備え、ポンプ部を、内燃機関の吸気管の一部を構成する吸気管部材の外周部に、吸気管部材の軸心方向と交差するように支持させ、吸気管部材と交差したポンプ部の一方の端部に駆動部を設け、交差したポンプ部の他方の端部に吸込用接続口体およびリターン用接続口体を設けたことを特徴とする。 In order to achieve the above object, a fuel supply device according to the invention of claim 1 includes a pump unit that pressurizes fuel, a drive unit that drives the pump unit, and a suction connection port body that guides sucked fuel to the pump unit. And a return connection port that discharges return fuel from the pump portion, and the pump portion is disposed on the outer peripheral portion of the intake pipe member that forms part of the intake pipe of the internal combustion engine, in the axial direction of the intake pipe member. Is provided with a drive part at one end of the pump part that intersects the intake pipe member, and a suction connection body and a return connection body at the other end of the intersecting pump part. It is characterized by that.
　同構成により、ポンプ部の重量は、吸気管部材を中心に両側に振り分けられる。このポンプ部の一端部に、重量のある駆動部が配置され、反対側となる他端部に、燃料タンクから延びるホース部材と接続される吸込用接続口体、リターン用接続口体が配置される。 With this configuration, the weight of the pump part is distributed to both sides centering on the intake pipe member. A heavy drive unit is arranged at one end of the pump unit, and a suction connection port connected to a hose member extending from the fuel tank and a return connection port are arranged at the other end on the opposite side. The
　請求項２の発明では、ポンプ部は、プランジャの往復動により燃料を加圧する筒形状のプランジャ式ポンプ部を有した構成を用い、駆動部は、プランジャを往復駆動するモータ部を有して構成し、吸気管部材の外周部にプランジャ式ポンプ部が、同ポンプ部の軸心方向と吸気管部材の軸心方向とが交差するように支持され、この吸気管部材と交差したプランジャ式ポンプ部の一方の端部にモータ部が設けられ、交差したプランジャ式ポンプ部の他方の端部に吸込用接続口体およびリターン用接続口体が設けられることを特徴とする。 In the invention of claim 2, the pump unit uses a configuration having a cylindrical plunger type pump unit that pressurizes fuel by reciprocating movement of the plunger, and the drive unit has a motor unit that reciprocates the plunger. A plunger-type pump part is supported on the outer periphery of the intake pipe member so that the axial direction of the pump part intersects with the axial direction of the intake pipe member, and the plunger-type pump part intersected with the intake pipe member A motor portion is provided at one end of the suction pump, and a suction connection port body and a return connection port body are provided at the other end portion of the intersecting plunger type pump portion.
　請求項３の発明では、モータ部は、プランジャ式ポンプ部の一方の端部から吸気管部材の周方向に沿って略Ｌ形に配置し、モータ部の重心位置を吸気管部材に寄せてあることを特徴とする。
　請求項４の発明では、プランジャ式ポンプ部は、吸込用接続口体およびリターン用接続口体の配置される他方の端側に、吐出燃料を所定圧に保つプレッシャレギュレータを有することを特徴とする。 In the invention of claim 3, the motor part is arranged in an approximately L shape from one end of the plunger type pump part along the circumferential direction of the intake pipe member, and the center of gravity of the motor part is brought close to the intake pipe member. It is characterized by that.
According to a fourth aspect of the present invention, the plunger-type pump portion has a pressure regulator that maintains the discharged fuel at a predetermined pressure on the other end side where the suction connection port body and the return connection port body are disposed. .
　請求項５の発明では、モータ部とプランジャ式ポンプ部は、それぞれ吸気管部材の外周部に最も接近させて配置してあることを特徴とする。
　請求項６の発明では、モータ部とプランジャ式ポンプ部は、吸気管部材の軸心を中心とした円の軌跡上に配置されることを特徴とする。 The invention according to claim 5 is characterized in that the motor part and the plunger type pump part are respectively arranged closest to the outer peripheral part of the intake pipe member.
The invention according to claim 6 is characterized in that the motor part and the plunger type pump part are arranged on a circular locus centering on the axis of the intake pipe member.
　請求項７の発明では、プランジャ式ポンプ部で加圧された燃料を吸気管部材内へ噴射するインジェクタを有し、さらにプランジャ式ポンプ部およびモータ部を吸気管部材に支持する支持部を有し、インジェクタは、吸気管部分と交差するプランジャ式ポンプ部の中間部分に配置されて、吸気管部分に噴射可能に設置され、支持部は、インジェクタとは反対側のプランジャ式ポンプ部と吸気管部材とが交差する部分間を連結する止め部と、モータ部のプランジャ式ポンプを支点とした振れを抑える振れ止め部とを有して構成されることを特徴とする。 According to a seventh aspect of the present invention, there is provided an injector for injecting fuel pressurized by the plunger type pump part into the intake pipe member, and further comprising a support part for supporting the plunger type pump part and the motor part on the intake pipe member. The injector is disposed at an intermediate portion of the plunger-type pump portion that intersects the intake pipe portion, and is installed so as to be able to inject into the intake pipe portion. The support portion includes a plunger-type pump portion and an intake pipe member opposite to the injector. It is characterized by having a stop part that connects between the parts that intersect with each other, and an anti-sway part that suppresses the shake with the plunger pump of the motor part as a fulcrum.
　請求項８の発明では、プランジャ式ポンプ部は、同プランジャ式ポンプ部の吸い込みを助けるダイヤフラム式ポンプ部を有することを特徴とする。 The invention according to claim 8 is characterized in that the plunger type pump unit has a diaphragm type pump unit that assists the suction of the plunger type pump unit.
　請求項１の発明によれば、燃料供給装置は、ポンプ部の重量が吸気管部材を中心に両側に振り分けられるだけでなく、自動二輪車など車両に燃料供給装置を設置した状態になると、ポンプ部の他端部には、吸込用接続口体およびリターン用接続口体の重量に加え、これら接続口体に接続されるホース部材や同ホース部材を止める止め具などの重量が加わるので、各種接続口体の有るポンプ部の他端側と、駆動部の有るポンプ部の一端側とが重量的にバランスされやすくなる。これにより、燃料タンクから延びるホース部材での拘束だけでポンプ部や駆動部の振れが抑えられる。つまり、ポンプ部や駆動部は、自動二輪車など車両に設置した状態になると、吸気管部材からの振動や衝撃に対し振れ難くなる。
　したがって、燃料供給装置は、ポンプ部、駆動部、吸込用接続口体およびリターン用接続口体をバランスよく配置するという簡単な構造で、吸気管部材から伝わる振動や衝撃に対する耐振性の向上、さらに述べれば自動二輪車など車両に設置した状態における耐振性の向上を図ることができる。 According to the first aspect of the present invention, the fuel supply device not only distributes the weight of the pump portion to both sides around the intake pipe member, but also when the fuel supply device is installed in a vehicle such as a motorcycle. In addition to the weight of the suction connection port body and the return connection port body, the other end portion of the body is added with the weight of a hose member connected to these connection port bodies and a stopper for stopping the hose member. The other end side of the pump part having the mouth and the one end side of the pump part having the driving part are easily balanced in weight. Thereby, the shake of a pump part and a drive part is suppressed only by restraint with the hose member extended from a fuel tank. That is, when the pump unit and the drive unit are installed in a vehicle such as a motorcycle, the pump unit and the drive unit are less likely to shake due to vibration and impact from the intake pipe member.
Therefore, the fuel supply device has a simple structure in which the pump unit, the drive unit, the suction connection port body, and the return connection port body are arranged in a balanced manner, improving vibration resistance against vibrations and shocks transmitted from the intake pipe member, In other words, it is possible to improve vibration resistance in a state where the vehicle is installed in a vehicle such as a motorcycle.
　請求項２の発明によれば、簡単な構造で、重量バランスの確保が難しいような、プランジャ式ポンプ部を用いた燃料供給装置における耐振性の向上が図られる。特に筒形状のプランジャ式ポンプ部は、横向きの交差配置により、重心位置が吸気管部材に近づくことになり、ポンプ部自身も、かなり振れ難くなるので、燃料供給装置の全体の耐振性が増加する。 According to the invention of claim 2, the vibration resistance in the fuel supply device using the plunger type pump unit, which is difficult to ensure the weight balance with a simple structure, can be improved. In particular, the cylindrical plunger-type pump part has its center of gravity approaching the intake pipe member due to the transverse crossing arrangement, and the pump part itself is also difficult to shake, so the overall vibration resistance of the fuel supply device increases. .
　請求項３の発明によれば、重量の有るモータ部は、吸気管部材の近くに寄せられるため、モータ部の重心位置が吸気管部材に近づく。これにより、プランジャ式ポンプ部に生ずる、吸気管部材を中心とした回転モーメントが抑えられ、一層、燃料供給装置が振れ難くなる。
　請求項４の発明によれば、重量の有るプレッシャレギュレータが、吸込用接続口体およびリターン用接続口体の有るプランジャ式ポンプの他端側に配置されることで、一層、反対側（モータ部）と重量的にバランスしやすくなる。これにより、燃料供給装置は、プレッシャレギュレータを活用することで、一層、振れ難くなる。 According to the invention of claim 3, since the heavy motor part is brought close to the intake pipe member, the position of the center of gravity of the motor part approaches the intake pipe member. Thereby, the rotational moment centering on the intake pipe member generated in the plunger type pump part is suppressed, and the fuel supply device is more difficult to shake.
According to the fourth aspect of the present invention, the heavy pressure regulator is disposed on the other end side of the plunger-type pump having the suction connection port body and the return connection port body, so that the opposite side (motor part) ) And weight. As a result, the fuel supply device becomes more difficult to shake by utilizing the pressure regulator.
　請求項５の発明によれば、吸気管部材を中心としたモータ部やプランジャ式ポンプ部に生ずる、回転モーメントが抑えられ、燃料供給装置が、一層、振れ難くなる。
　請求項６の発明によれば、さらに効果的に燃料供給装置の各部が振れ難くなる。 According to the invention of claim 5, the rotational moment generated in the motor part and plunger type pump part centering on the intake pipe member is suppressed, and the fuel supply device becomes more difficult to shake.
According to the sixth aspect of the present invention, each part of the fuel supply device is more difficult to shake.
　請求項７の発明によれば、振れ難くした燃料供給装置を活用することで、インジェクタを設置し、プランジャ式ポンプ部と吸気管部分とが交差する部分を連結する止め部やモータ部の振れを抑える振れ止め部を用いるだけの簡単な構造で、燃料供給装置の全体を強固に吸気管部分に固定することができる。
　請求項８の発明によれば、プランジャ式ポンプ部の吸い込み機能が高められ、どのような地点に有る燃料タンクからでも、同燃料タンク内の燃料を適正にインジェクタへ供給することができる。 According to the seventh aspect of the present invention, by utilizing the fuel supply device which is difficult to shake, the injector is installed, and the stop portion and the motor portion which connect the portion where the plunger-type pump portion intersects the intake pipe portion are shaken. The entire fuel supply device can be firmly fixed to the intake pipe portion with a simple structure that only uses the restraining stop portion.
According to the invention of claim 8, the suction function of the plunger-type pump section is enhanced, and the fuel in the fuel tank can be properly supplied to the injector from any fuel tank.
本発明の一実施形態に係る燃料供給装置を、同装置を搭載した自動二輪車と共に示す側面図。The side view which shows the fuel supply apparatus which concerns on one Embodiment of this invention with the motorcycle which mounts the apparatus. 同じく燃料供給装置の外観および内部構造を示す斜視図。The perspective view which similarly shows the external appearance and internal structure of a fuel supply apparatus. 同じく燃料供給装置を吸気管部材から外した状態を示す分解斜視図。The disassembled perspective view which shows the state which similarly removed the fuel supply apparatus from the intake pipe member. 図２中のＡ－Ａ線に沿う断面図。FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. 図２中のＢ－Ｂ線に沿うプランジャ式ポンプ部、ダイヤフラム式ポンプ部、吸込用接続口体、リターン用接続口体、プレッシャレギュレータおよびモータ部（一部）を示す断面図。Sectional drawing which shows the plunger type pump part, diaphragm type pump part, suction connection port body, return connection port body, a pressure regulator, and a motor part (part) along the BB line in FIG.
　以下、本発明を図１ないし図５に示す一実施形態にもとづいて説明する。
　図１は、本発明を適用した燃料供給装置を据え付けた車両、例えば自動二輪車の側面図（概略的）を示している。図１中の矢印Ｆは自動二輪車のフロント方向を示し、矢印Ｒは自動二輪車のリア方向を示している。 Hereinafter, the present invention will be described based on an embodiment shown in FIGS.
FIG. 1 is a side view (schematic) of a vehicle, for example, a motorcycle, on which a fuel supply device to which the present invention is applied is installed. An arrow F in FIG. 1 indicates the front direction of the motorcycle, and an arrow R indicates the rear direction of the motorcycle.
　図１に示す自動二輪車は、前後方向に延びるメインフレーム部材、例えばメインチューブ部材１（一部しか図示しない）を有する。同メインチューブ部材１のフロント側の端部には、フロントフォーク３を介して前輪５が懸架され、同じくリア側の端部に、スイングアーム部材７を介して後輪９が懸架される。 The motorcycle shown in FIG. 1 has a main frame member extending in the front-rear direction, for example, a main tube member 1 (only a part is shown). A front wheel 5 is suspended from a front end of the main tube member 1 via a front fork 3, and a rear wheel 9 is suspended from a rear end of the main tube member 1 via a swing arm member 7.
　メインチューブ部材１には、フロント側から順に燃料タンク１１、シート１２が据え付けられている。メインチューブ部材１を挟んだ片側（右側）には、ブレーキペダルやスロットルグリップなど加減速系統（図示しない）が設けられ、反対側（左側）には、クラッチレバーやシフトペダルなど変速系統（図示しない）が設けられる。 The fuel tank 11 and the seat 12 are installed on the main tube member 1 in order from the front side. An acceleration / deceleration system (not shown) such as a brake pedal and a throttle grip is provided on one side (right side) sandwiching the main tube member 1, and a speed change system (not shown) such as a clutch lever and shift pedal is provided on the opposite side (left side). ) Is provided.
　メインチューブ部材１から下側に延びたダウンチューブ部材１ａ、燃料タンク１１で囲まれる空間には、内燃機関、例えばピストン１３ａを往復動可能に収めた単気筒のレシプロ式エンジン１３（以下、単にエンジン１３という）が据え付けられている。このエンジン１３の側部には、順に短管部材１５（本願の吸気管部材に相当）、スロットルバルブ装置１７が連結され、これらはエンジン１３の吸入用ポート（図示しない）とエアクリーナ（図示しない）との間を連通させる吸気管を構成している。 In a space surrounded by the down tube member 1a extending downward from the main tube member 1 and the fuel tank 11, an internal combustion engine, for example, a single-cylinder reciprocating engine 13 (hereinafter simply referred to as the engine) in which a piston 13a is reciprocally moved. 13) is installed. A short pipe member 15 (corresponding to an intake pipe member of the present application) and a throttle valve device 17 are sequentially connected to the side portion of the engine 13, and these include an intake port (not shown) of the engine 13 and an air cleaner (not shown). An intake pipe that communicates with each other is configured.
　短管部材１５には、電子制御式のインジェクタ１９と共に燃料供給装置２１が設置され、これらは短管部材１５内へ燃料を噴射可能としている。
　図２の斜視図には、この燃料供給装置２１の全体および内部の構造（点線部分）が示され、図３の分解斜視図には、同燃料供給装置２１を短管部材１５から外した状態が示され、図４，５の断面図には、同燃料供給装置２１の各部（図２中のＡ－Ａ線、Ｂ－Ｂ線に沿う断面）が示されている。 The short pipe member 15 is provided with a fuel supply device 21 together with an electronically controlled injector 19, and these can inject fuel into the short pipe member 15.
The perspective view of FIG. 2 shows the entire fuel supply device 21 and the internal structure (dotted line portion), and the exploded perspective view of FIG. 3 shows the fuel supply device 21 removed from the short tube member 15. 4 and 5, the respective parts of the fuel supply device 21 (cross sections taken along lines AA and BB in FIG. 2) are shown.
　図２～図５を参照して燃料供給装置２１を説明すると、燃料供給装置２１は、ポンプ部２５と、同ポンプ部２５を駆動する駆動部２７と、各種接続口体である管状の吸込用接続口体２９およびリターン用接続口体３１とを有している。ポンプ部２５と駆動部２７とは別体である。これらポンプ部２５、駆動部２７および各接続口体２９，３１が、短管部材１５の外周部に配置されている。 The fuel supply device 21 will be described with reference to FIGS. 2 to 5. The fuel supply device 21 includes a pump unit 25, a drive unit 27 that drives the pump unit 25, and tubular suction ports that are various connection ports. A connection port body 29 and a return connection port body 31 are provided. The pump unit 25 and the drive unit 27 are separate bodies. The pump unit 25, the drive unit 27, and the connection port bodies 29 and 31 are disposed on the outer peripheral portion of the short tube member 15.
　ポンプ部２５、駆動部２７を説明すると、ポンプ部２５は、図２および図５に示されるように筒状のポンプ本体３３を有している。このポンプ本体３３は、軸方向で二つに分割された分割式の構造で構成される。３３ａ，３３ｂは、分割した本体部分と蓋部分とを示す。
　ポンプ部２５は、このポンプ本体３３の軸心方向に沿って各種ポンプ部品を収めたプランジャ式ポンプ部３５で構成される。このプランジャ式ポンプ部３５は、同プランジャ式ポンプ部３５のポンプ部品を挟んだ一端側にダイヤフラム式ポンプ部４９を有し、他端側にプレッシャレギュレータ６１を有して、短筒形に構成されている（図２，３）。 The pump unit 25 and the drive unit 27 will be described. The pump unit 25 has a cylindrical pump body 33 as shown in FIGS. 2 and 5. The pump main body 33 has a split structure divided into two in the axial direction. Reference numerals 33a and 33b denote divided main body portions and lid portions.
The pump unit 25 includes a plunger-type pump unit 35 that houses various pump parts along the axial direction of the pump body 33. This plunger type pump part 35 has a diaphragm type pump part 49 on one end side sandwiching the pump parts of the plunger type pump part 35 and a pressure regulator 61 on the other end side, and is configured in a short cylinder shape. (Figs. 2 and 3).
　すなわち、プランジャ式ポンプ部３５は、図５に示されるように一端部を吸込側とし、他端部を吐出側として、ポンプ本体３３の軸心方向に沿って組み込まれた筒形のスリーブ３７、同スリーブ３７内に往復動可能に収められた筒形のプランジャ３９、同プランジャ３９の内腔に組み付けられた吸入バルブ４１、スリーブ３７の吐出側に組み付けられた吐出バルブ４３を有して構成される。つまり、プランジャ式ポンプ部３５は、プランジャ３９が往復動すると、プランジャ３９内の燃料（吸込燃料）が吸入バルブ４１を通じてスリーブ端に形成される加圧室４５に導かれ、同加熱室４５で加圧され、加圧された燃料が吐出バルブ４３から吐出される構造を有している。インジェクタ１９は、このプランジャ式ポンプ部３５のポンプ本体３３に組み付いている。 That is, as shown in FIG. 5, the plunger-type pump unit 35 has a cylindrical sleeve 37 incorporated along the axial direction of the pump body 33 with one end portion as a suction side and the other end portion as a discharge side. The sleeve 37 is configured to include a cylindrical plunger 39 that is reciprocally movable, a suction valve 41 that is assembled in the lumen of the plunger 39, and a discharge valve 43 that is assembled on the discharge side of the sleeve 37. The That is, when the plunger 39 reciprocates, the plunger pump unit 35 guides the fuel (suction fuel) in the plunger 39 to the pressurizing chamber 45 formed at the sleeve end through the suction valve 41, and adds the fuel in the heating chamber 45. It has a structure in which pressurized and pressurized fuel is discharged from the discharge valve 43. The injector 19 is assembled to the pump body 33 of the plunger type pump unit 35.
　ダイヤフラム式ポンプ部４９は、図５に示されるようにスリーブ３７の吸込側に形成したダイヤフラム室５１、同ダイヤフラム室５１を塞ぐように設けたダイヤフラム５３、同ダイヤフラム５３の中央部をプランジャ３９端に固定する柱状の固定具５５、通路５７ａを介してダイヤフラム室５１と連通する吸込バルブ５７を有して構成されている。つまり、ダイヤフラム式ポンプ部４９は、プランジャ３９が往復動すると、ダイヤフラム５１が振幅し、同振幅がもたらすダイヤフラム室５１でのポンプ動作により、吸込バルブ５７から燃料を吸い込んでプランジャ３９内へ導く。このダイヤフラム式ポンプ部４９により、不足するプランジャ式ポンプ部３５の吸い込み機能が補助される。またダイヤフラム室５１は、通路５９ａを介して、リターン燃料用の吐出バルブ５９とも連通している。 As shown in FIG. 5, the diaphragm pump 49 includes a diaphragm chamber 51 formed on the suction side of the sleeve 37, a diaphragm 53 provided so as to close the diaphragm chamber 51, and a central portion of the diaphragm 53 at the end of the plunger 39. A columnar fixing tool 55 to be fixed and a suction valve 57 communicating with the diaphragm chamber 51 through a passage 57a are provided. That is, when the plunger 39 reciprocates, the diaphragm type pump unit 49 amplifies the diaphragm 51, and sucks fuel from the suction valve 57 and guides it into the plunger 39 by the pumping operation in the diaphragm chamber 51 caused by the amplitude. The diaphragm type pump unit 49 assists the insufficient suction function of the plunger type pump unit 35. The diaphragm chamber 51 also communicates with a return fuel discharge valve 59 through a passage 59a.
　またプレッシャレギュレータ６１としては、図５に示されるように吐出バルブ４３の出口側に形成された吐出室６３を、リリーフバルブ６５付のダイヤフラム６７で塞ぎ、同ダイヤフラム６７をスプリング部材６９で押える構造が用いられている。つまり、プレッシャレギュレータ６１では、ダイヤフラム６７の変位により、吐出室６３内の吐出燃料を所定圧に保ち、過剰な燃料圧になると、リリーフバルブ６５を通じて、スプリング部材６９を収めたスプリング室７１へ同圧力の燃料が逃がされる。そして、吐出室６３は、通路１９ａ、後述するポンプ本体３３に形成された接続口部３３ｃ（インジェクタ１９の基部が嵌る部分）を介して、インジェクタ１９の入口部と連通しており、所定圧の燃料がインジェクタ１９へ供給される構造を有している。 As shown in FIG. 5, the pressure regulator 61 has a structure in which a discharge chamber 63 formed on the outlet side of the discharge valve 43 is closed with a diaphragm 67 with a relief valve 65 and the diaphragm 67 is pressed by a spring member 69. It is used. That is, in the pressure regulator 61, when the discharge fuel in the discharge chamber 63 is kept at a predetermined pressure due to the displacement of the diaphragm 67 and becomes an excessive fuel pressure, the pressure is applied to the spring chamber 71 containing the spring member 69 through the relief valve 65. Of fuel is released. The discharge chamber 63 communicates with the inlet portion of the injector 19 through a passage 19a and a connection port portion 33c (a portion where the base portion of the injector 19 fits) formed in the pump body 33 described later. The fuel is supplied to the injector 19.
　駆動部２７には、図２に示されるように例えば筒形のモータケース７３内にＤＣモータ７５を収めた筒形状のモータ部２７ａが用いられる。ＤＣモータ７５の出力軸が配置されるモータケース７３の端部には、回転運動を往復運動に変換するカム機構７７（変換機構）が内蔵されている。ここで、カム機構７７は、例えばＤＣモータ部７５の出力軸に偏心カム７９を組み付け、この偏心カム７９に枠形のカム受け部材８１を嵌めて構成され、カム受け部材８１によって偏心カム７９の偏心回転運動を往復運動に変換する。このカム受け部材８１の出力部が、モータケース７３の端部、ここではモータ部２７ａの軸心方向とは直角な側部に配置されている。 2, for example, as shown in FIG. 2, a cylindrical motor unit 27 a in which a DC motor 75 is housed in a cylindrical motor case 73 is used. A cam mechanism 77 (conversion mechanism) that converts rotational motion into reciprocating motion is built in the end of the motor case 73 where the output shaft of the DC motor 75 is disposed. Here, the cam mechanism 77 is configured, for example, by assembling an eccentric cam 79 to the output shaft of the DC motor unit 75 and fitting a frame-shaped cam receiving member 81 to the eccentric cam 79. Converts eccentric rotational motion to reciprocating motion. The output portion of the cam receiving member 81 is disposed on the end portion of the motor case 73, here on the side portion perpendicular to the axial direction of the motor portion 27a.
　これら筒形状のポンプ部２５、筒形の駆動部２７、各接続口体２９，３１が、自動二輪車に、設置した状態で十分な耐振性が確保されるように組み付けられている。
　この耐振性の確保のため、燃料供給装置２１の各部のレイアウトには工夫が施されている。 The cylindrical pump unit 25, the cylindrical drive unit 27, and the connection ports 29 and 31 are assembled to the motorcycle so that sufficient vibration resistance is ensured in the installed state.
In order to ensure this vibration resistance, the layout of each part of the fuel supply device 21 is devised.
　この工夫として、図２～図４に示されるようにポンプ部２５を、短管部材１５の軸心方向と交差するように配置し、短管部材１５と交差するポンプ部２５の一方の端部にモータ部２７ａ（駆動部２７）を設け、反対側のポンプ部２５の他方の端部に、吸込用接続口体２９、リターン用接続口体３１を設けるようなレイアウトが用いられている。 As a device for this, as shown in FIGS. 2 to 4, the pump portion 25 is arranged so as to intersect the axial direction of the short tube member 15, and one end portion of the pump portion 25 intersecting the short tube member 15. Is provided with a motor part 27a (drive part 27), and a suction connection port body 29 and a return connection port body 31 are provided at the other end of the pump part 25 on the opposite side.
　すなわち、図２～図４に示されるようにポンプ部２５の中間部（軸方向）は、短管部材１５の外周部の上部に、同短管部材１５の軸心方向と交差する横向きに配置される。具体的には、筒形のプランジャ式ポンプ部３５は、同プランジャ式ポンプ部３５の軸心方向と短管部材１５の軸心方向とが互いに交差、例えば直交交差する横向きに配置されて、短管部材１５に取り付けられる（低重心の配置）。プランジャ式ポンプ部３５は、短管部材１５の外周部に最も接近させてあり、できるだけ低重心に配置させてある。 That is, as shown in FIGS. 2 to 4, the intermediate portion (axial direction) of the pump portion 25 is disposed on the upper portion of the outer peripheral portion of the short tube member 15 so as to cross the axial direction of the short tube member 15. Is done. Specifically, the cylindrical plunger-type pump unit 35 is arranged in a lateral direction in which the axial center direction of the plunger-type pump unit 35 and the axial center direction of the short tube member 15 intersect each other, for example, orthogonally intersect with each other. It is attached to the pipe member 15 (arrangement with a low center of gravity). The plunger-type pump part 35 is closest to the outer peripheral part of the short tube member 15 and is arranged at the lowest center of gravity as much as possible.
　一方、図２～図５に示されるようにモータ部２７ａは、同モータ部２７ａからプランジャ３９へ駆動力が伝わるよう、カム機構７５の出力部の有るモータケース７３の側部が、プランジャ３９の入力部の有るポンプ本体３３の端部に接続されている。そして、モータ部２７ａの全体は、下方方向に沿って配置され、プランジャ式ポンプ部３５とは異なる縦向きに配置されている。このレイアウトにより、ポンプ部２７ａの全体を、吸気管部材２５の外周部の周方向に沿う略L形に配置させ、モータ部２７ａの重心位置を吸気管部材２５へ寄せている。なお、モータ部２７ａについては、短管部材１５の外周部に最も接近させてある。 On the other hand, as shown in FIGS. 2 to 5, the motor portion 27 a has a side portion of the motor case 73 having the output portion of the cam mechanism 75 so that the driving force is transmitted from the motor portion 27 a to the plunger 39. It is connected to the end of the pump body 33 having an input section. The entire motor unit 27 a is arranged along the downward direction, and is arranged in a different vertical direction from the plunger pump unit 35. With this layout, the entire pump part 27 a is arranged in a substantially L shape along the circumferential direction of the outer peripheral part of the intake pipe member 25, and the position of the center of gravity of the motor part 27 a is brought close to the intake pipe member 25. Note that the motor portion 27 a is closest to the outer peripheral portion of the short tube member 15.
　他方、図２～図５に示されるように吸込用接続口体２９とリターン用接続口体３１は、プランジャ式ポンプ部３５（ポンプ部２５）のうち、モータ部２７ａとは反対側の端部（蓋部分３３ｂ）の端面に一体に形成され、同端面から前方へ突出している。このうち吸込用接続口体２９は、吸込バルブ５７に連通している。この吸込用接続口体２９には、燃料タンク１１の下部から延びる燃料供給用ホース部材８５（二点鎖線で、一部しか図示せず）が、ホースバンドなどの止め具８６（図４に二点鎖線で図示）により接続されている。これにより、燃料タンク１１内の燃料が、吸込用接続口体２９、ダイヤフラム式ポンプ部４９を通じ、プランジャ式ポンプ部３５へ導かれる。 On the other hand, as shown in FIGS. 2 to 5, the suction connection port body 29 and the return connection port body 31 are end portions of the plunger type pump unit 35 (pump unit 25) opposite to the motor unit 27a. It is formed integrally with the end surface of (lid portion 33b) and protrudes forward from the end surface. Of these, the suction connection port body 29 communicates with the suction valve 57. A fuel supply hose member 85 (only a part of which is shown by a two-dot chain line) extending from the lower part of the fuel tank 11 is connected to the suction connection port body 29 with a stopper 86 such as a hose band (two in FIG. 4). Connected by a dotted line). As a result, the fuel in the fuel tank 11 is guided to the plunger-type pump unit 35 through the suction connection port body 29 and the diaphragm-type pump unit 49.
　また図２～図５に示されるようにリターン用接続口体３１は、吐出バルブ５９に連通している。このリターン用接続口体３１には、燃料タンク１１から延びるリターン用ホース部材８７（二点鎖線で、一部しか図示せず）が、ホースバンドなどの止め具８８により接続されている。これにより、吐出バルブ５９からの燃料、すなわちプランジャ式ポンプ部３５から吸い込まれない余剰の燃料が、リターン用接続口体３１から燃料タンク１１へ回収される。リリーフバルブ６５（プレッシャレギュレータ６１）から逃げる燃料も、リターン用接続口体３１を通じて回収される。 Further, as shown in FIGS. 2 to 5, the return connection port body 31 communicates with the discharge valve 59. A return hose member 87 (only part of which is shown by a two-dot chain line) extending from the fuel tank 11 is connected to the return connection port 31 by a stopper 88 such as a hose band. As a result, the fuel from the discharge valve 59, that is, excess fuel that is not sucked from the plunger-type pump unit 35 is recovered from the return connection port 31 to the fuel tank 11. The fuel escaping from the relief valve 65 (pressure regulator 61) is also collected through the return connection port 31.
　このように構成された燃料供給装置２１は、自動二輪車に設置された状態になると（図１、２）、各部のレイアウトだけで、自身でかなりの耐振性を発揮する。
　すなわち、図１および図２に示されるようにプランジャ式ポンプ部３５（ポンプ部２５）の重量は、同ポンプ部３５と交差する短管部材１５を中心に左右両側に振り分けられる。自動二輪車に燃料供給装置２１が設置された状態では、プランジャ式ポンプ部３５（ポンプ部２５）の一端側にモータ部２７ａが配置されるために、重量バランスが悪くなるように見える。しかしながら、このプランジャ式ポンプ部３５（ポンプ部２５）の他端部には、吸込用接続口体２９およびリターン用接続口体３１の重量が加わるとともに、これら接続口体２９、３１に接続されるホース部材８５，８７（燃料タンク１１から下がる）や同ホース部材８５，８７を止める止め具８６，８８の重量が加わる。そのため、反対側の、重量の有るモータ部２７ａが配置された一端側とは、重量的にバランスされやすくなる。これは、短管部材１５と交差するプランジャ式ポンプ部３５（ポンプ部２５）の位置が、重量的なバランスの得やすい地点に定められることにもよる。この重量的なバランスにより、プランジャ式ポンプ部３５やモータ部２７ａの振れは、燃料タンク１１から延びるホース部材８５，８７による拘束だけで抑えられる。 When the fuel supply device 21 configured as described above is installed in a motorcycle (FIGS. 1 and 2), the fuel supply device 21 exhibits considerable vibration resistance by itself only with the layout of each part.
That is, as shown in FIGS. 1 and 2, the weight of the plunger-type pump unit 35 (pump unit 25) is distributed to the left and right sides around the short pipe member 15 that intersects with the pump unit 35. In a state where the fuel supply device 21 is installed in the motorcycle, the motor portion 27a is disposed on one end side of the plunger-type pump portion 35 (pump portion 25), so that the weight balance seems to deteriorate. However, the weight of the suction connection port body 29 and the return connection port body 31 is added to the other end portion of the plunger-type pump unit 35 (pump unit 25), and the plunger connection unit 29 is connected to the connection port bodies 29 and 31. The weights of the hose members 85 and 87 (down from the fuel tank 11) and stoppers 86 and 88 for stopping the hose members 85 and 87 are added. Therefore, it becomes easy to balance in weight with the opposite one end side where the heavy motor part 27a is arranged. This is because the position of the plunger type pump part 35 (pump part 25) intersecting with the short pipe member 15 is determined at a point where a weight balance is easily obtained. Due to this weight balance, the swing of the plunger type pump part 35 and the motor part 27 a can be suppressed only by restraint by the hose members 85 and 87 extending from the fuel tank 11.
　つまり、プランジャ式ポンプ部３５やモータ部２７ａ（駆動部２７）は、自動二輪車に搭載（設置）した状態になると、短管部材１５から伝わる振動（エンジン振動や走行振動など）や衝撃に対して振れ難くなる。
　したがって、燃料供給装置２１は、プランジャ式ポンプ３５（ポンプ部２５）、モータ部２７ａ（駆動部２７）、吸込用接続口体２９およびリターン用接続口体３１をバランスよく配置させるという簡単な構造で、自動二輪車に搭載した状態下において、短管部材１５から伝わる振動や衝撃に対する耐振性を向上させることができる。 That is, when the plunger-type pump unit 35 and the motor unit 27a (drive unit 27) are mounted (installed) on the motorcycle, the plunger-type pump unit 35 and the motor unit 27a (drive unit 27) are resistant to vibration (engine vibration, running vibration, etc.) It becomes difficult to shake.
Therefore, the fuel supply device 21 has a simple structure in which the plunger pump 35 (pump unit 25), the motor unit 27a (drive unit 27), the suction connection port body 29, and the return connection port body 31 are arranged in a balanced manner. The vibration resistance against vibrations and impacts transmitted from the short tube member 15 can be improved under the condition of being mounted on a motorcycle.
　この耐振性の確保は、重量バランスの確保が難しいような、筒形状のプランジャ式ポンプ部３５を用い、重量の有るモータ部２７ａを用いて構成される燃料供給装置２１には有効である。しかも、筒形のプランジャ式ポンプ部３５は、横向きに配置させることで、重心位置が低くなり、それだけでプランジャ式ポンプ部３５の全体が振れ難く（上下方向に対し）なることから、燃料供給装置２１全体の耐振性を、一層、高めるようにできる。そのうえモータ部２７ａは、短管部材１５の周方向に沿って略Ｌ形に配置されることで、モータ部２７ａの重心位置も短管部材１５に近づき、短管部材１５を中心とした回転モーメントが抑えられることになるので、燃料供給装置２１が振れ難くなり、一層、耐振性を高めることができる。 Securing the vibration resistance is effective for the fuel supply device 21 configured using the cylindrical plunger pump unit 35 and the heavy motor unit 27a, which makes it difficult to ensure the weight balance. Moreover, the cylindrical plunger type pump unit 35 is disposed sideways, so that the position of the center of gravity is lowered, and the plunger type pump unit 35 as a whole is difficult to shake (relative to the vertical direction). The vibration resistance of the entire 21 can be further increased. In addition, the motor portion 27a is arranged in an approximately L shape along the circumferential direction of the short tube member 15, so that the position of the center of gravity of the motor portion 27a also approaches the short tube member 15 and the rotational moment about the short tube member 15 is obtained. Therefore, it is difficult for the fuel supply device 21 to shake, and the vibration resistance can be further improved.
　特に燃料供給装置２１は、吸込用接続口体２９、リターン用接続口体３１の配置されるプランジャ式ポンプ部３５の端側に、プレッシャレギュレータ６１が配置されると、プレッシャレギュレータ６１の重量もプランジャ式ポンプ部３５（ポンプ部２５）の他端部に加わるので、一層、反対側（モータ部２７ａ）と重量的にバランスしやすくなる。つまり、燃料供給装置２１の全体は、プレッシャレギュレータ６１を活用することで、一層、振れ難くなり、耐振性が高められる。 In particular, when the pressure regulator 61 is disposed on the end side of the plunger-type pump portion 35 where the suction connection port body 29 and the return connection port body 31 are disposed, the fuel supply device 21 has the weight of the pressure regulator 61 as well as the plunger. Since it is added to the other end of the pump section 35 (pump section 25), it becomes easier to balance the weight with the opposite side (motor section 27a). That is, the fuel supply device 21 as a whole becomes more difficult to shake by using the pressure regulator 61, and the vibration resistance is improved.
　加えて、燃料供給装置２１は、プランジャ式ポンプ部３５、モータ部２７ａが、それぞれ短管部材１５の外周部と最も接近した地点に配置されていると、短管部材１５を中心としたプランジャ式ポンプ部３５やモータ部２７ａに生ずる回転モーメントが抑えられるので、燃料供給装置２１は、一層、振れ難くなり、耐振性が高められる。特に図４に示されるようにプランジャ式ポンプ部３５、モータ部２７ａを、短管部材１５の軸心を中心とした短管部材１５の外周部に最も接近させた円の軌跡上に配置することで、短管部材１５を中心とした燃料供給装置２１の各部の振れが効果的に抑えられ、耐振性が効果的に高められる。 In addition, the fuel supply device 21 has a plunger type centered on the short pipe member 15 when the plunger type pump part 35 and the motor part 27a are arranged at points closest to the outer peripheral part of the short pipe member 15, respectively. Since the rotational moment generated in the pump part 35 and the motor part 27a is suppressed, the fuel supply device 21 becomes more difficult to shake and the vibration resistance is improved. In particular, as shown in FIG. 4, the plunger-type pump unit 35 and the motor unit 27 a are arranged on a circular locus closest to the outer peripheral portion of the short tube member 15 centering on the axis of the short tube member 15. Thus, the vibration of each part of the fuel supply device 21 around the short tube member 15 is effectively suppressed, and the vibration resistance is effectively enhanced.
　しかも、燃料供給装置２１は、ダイヤフラム式ポンプ部３７を設けると、不足するプランジャ式ポンプ部３５の吸い込み機能が高められるので、燃料供給装置２１は、燃料供給装置２１よりもかなり高い位置に燃料タンクが有るという自動二輪車に限らず、図１に示されるような燃料供給装置２１が、燃料タンク１１の下部と略同じ高さに有る車両でも燃料の供給を確実に行うようにでき、燃料タンク１１の搭載位置に関わらず、燃料タンク１１内の燃料を適正にインジェクタ１９へ供給することができる。つまり、高い耐振性、高い艤装性をもつ燃料供給装置２１を提供できる。 Moreover, when the diaphragm pump unit 37 is provided in the fuel supply device 21, the insufficient suction function of the plunger pump unit 35 is enhanced, so that the fuel supply device 21 is located at a position considerably higher than the fuel supply device 21. The fuel supply device 21 as shown in FIG. 1 can reliably supply fuel even in a vehicle that is substantially at the same height as the lower portion of the fuel tank 11. Regardless of the mounting position, the fuel in the fuel tank 11 can be properly supplied to the injector 19. That is, the fuel supply device 21 having high vibration resistance and high wearability can be provided.
　そのうえ、このような振れ難くいレイアウトの燃料供給装置２１の場合、同燃料供給装置２１の固定に関しては、プランジャ式ポンプ部３５に組み付くインジェクタ１９を活用し、支持部９１で単純にプランジャ式ポンプ部３５、モータ部２７ａを短管部材１５に止めるだけの簡単な構造ですむ。 In addition, in the case of the fuel supply device 21 having such a layout that does not easily shake, the fuel supply device 21 is fixed by using the injector 19 assembled to the plunger type pump unit 35 and simply using the support unit 91 as a plunger type pump. A simple structure is sufficient in which the portion 35 and the motor portion 27a are stopped by the short pipe member 15.
　すなわち、図２～図４に示されるようにインジェクタ１９は、吸気管部分１５と交差するプランジャ式ポンプ部３５の中間部分（交差部分）、すなわちプランジャ式ポンプ部３５の一端部側と他端部側とが重量的に略バランスする中間部分に配置され、先端の噴射部１９ａを吸気管部分１５に連通接続させることによって、斜めの向きに取り付けられている。
このインジェクタ１９の取り付けのために、ポンプ本体３３の中間部分（軸心方向）には、インジェクタ１９の基部が挿脱可能に嵌る接続口体３３ｃ（図２，３に一部だけ図示）が設けられ、短管部材１５の壁部には、インジェクタ１９の噴射部１９ａが挿脱可能に嵌る先端支え部１５ａ（図２，３に一部だけ図示）が設けられている。 That is, as shown in FIGS. 2 to 4, the injector 19 has an intermediate portion (intersection portion) of the plunger-type pump portion 35 that intersects the intake pipe portion 15, that is, one end side and the other end portion of the plunger-type pump portion 35. It is disposed at an intermediate portion where the side is substantially balanced in weight, and is attached in an oblique direction by connecting the tip injection portion 19a to the intake pipe portion 15 in communication.
For the attachment of the injector 19, a connecting port 33c (only a part of which is shown in FIGS. 2 and 3) is provided in the middle part (axial direction) of the pump body 33 so that the base of the injector 19 can be inserted and removed. In addition, the wall portion of the short tube member 15 is provided with a tip support portion 15a (only part of which is shown in FIGS. 2 and 3) into which the injection portion 19a of the injector 19 is removably fitted.
　図２～図４に示されるように支持部９１は、インジェクタ１９とは反対側のプランジャ式ポンプ部３５と短管部材１５とが交差する部分間を連結する止め部９３と、プランジャ式ポンプ部３５の軸心を支点としたモータ部２７ａの振れを抑える振れ止め部９７とから構成されている。具体的には、止め部９３は、例えばポンプ本体３３の中間部分の外周部に板状のブラケット部９５を突設し、短管部材１５の外周部に台状の取付座９８を設け、ボルト部材９９の螺挿により、ブラケット部９５を取付座９８に締結する構造を有している。 As shown in FIGS. 2 to 4, the support portion 91 includes a stop portion 93 that connects portions where the plunger-type pump portion 35 and the short tube member 15 on the opposite side of the injector 19 intersect, and a plunger-type pump portion. The anti-sway part 97 is configured to suppress the shake of the motor part 27a with the shaft center of 35 as a fulcrum. Specifically, the stop portion 93 is provided with, for example, a plate-like bracket portion 95 protruding from the outer peripheral portion of the intermediate portion of the pump main body 33, a base-like mounting seat 98 provided on the outer peripheral portion of the short tube member 15, and a bolt The bracket portion 95 is fastened to the mounting seat 98 by screwing the member 99.
　また図３に示されるように振れ止め部９７には、例えば短管部材１５と隣り合うモータ部２７ａの側部に並行にピン部１０１を設け、短管部材１５の外周部に同ピン部１０１を受けるピン受け座１０３を設け、プランジャ式ポンプ部３５の取り付けに伴いピン部１０１がピン受け座１０３に形成されたピン穴１０３ａにピン部１０１を挿入するようにした構造が用いられる。 Further, as shown in FIG. 3, the steadying portion 97 is provided with, for example, a pin portion 101 in parallel with the side portion of the motor portion 27 a adjacent to the short tube member 15, and the pin portion 101 is provided on the outer peripheral portion of the short tube member 15. A structure is used in which a pin receiving seat 103 is provided, and the pin portion 101 is inserted into a pin hole 103 a formed in the pin receiving seat 103 when the plunger pump portion 35 is attached.
　ブラケット部９５、取付座９８のねじ穴９８ａ、ピン部１０１およびピン穴１０３ａの向きは、いずれもインジェクタ１９の組込方向（斜めの向き）と同じ斜め方向に定められている。
　これにより、燃料供給装置２１の全体を、インジェクタ１９の設置による「プランジャ式ポンプ部３５の水平方向の動きの拘束」、ボルト止めよる「プランジャ式ポンプ部３５の上下方向の動きの拘束（抜け止め）」、ピン部１０１による「プランジャ式ポンプ部２７ａを支点としたモータ部２７ａの振れ（前後方向）の抑え」という固定個所を最小数量に抑えた簡単な構造で強固に固定できる。 The directions of the bracket portion 95, the screw hole 98a of the mounting seat 98, the pin portion 101, and the pin hole 103a are all set to the same oblique direction as the assembly direction (oblique direction) of the injector 19.
As a result, the entire fuel supply device 21 is restrained by “installation of the injector 19 in the horizontal movement of the plunger-type pump part 35” and “fixed in the vertical movement of the plunger-type pump part 35 by bolting (retaining prevention). ) ”, And the pin portion 101 can be firmly fixed with a simple structure in which the number of fixing points,“ suppression of vibration (front-rear direction) of the motor portion 27a with the plunger pump portion 27a as a fulcrum ”, is suppressed to a minimum number.
　なお、本発明は一実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々可変して実施しても構わない。例えば上記一実施形態では、スロットルバルブ装置とは別体な短管部材（吸気管の一部を構成する吸気管部材）に燃料供給装置を設ける例を挙げたが、これに限らず、例えばスロットルバルブ装置のバルブボディ（吸気管の一部を構成する吸気管部材）に燃料供給装置を設けてもよく、このようにしても一実施形態と同様の効果を得ることができる。 It should be noted that the present invention is not limited to one embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the example in which the fuel supply device is provided in the short pipe member (the intake pipe member that constitutes a part of the intake pipe) separate from the throttle valve device has been described. A fuel supply device may be provided in the valve body (intake pipe member constituting a part of the intake pipe) of the valve device, and even in this case, the same effect as in the embodiment can be obtained.
　１５　短管部材（吸気管部材）
　１９　インジェクタ
　２１　燃料供給装置
　２７ａ　モータ部（駆動部）
　２９　吸込用接続口体
　３１　リターン用接続口体
　３５　プランジャ式ポンプ部（ポンプ部）
　３７　ダイヤフラム式ポンプ部
　６１　プレッシャレギュレータ
　９３　止め部
　９７　振れ止め部 15 Short pipe member (intake pipe member)
19 Injector 21 Fuel Supply Device 27a Motor Unit (Drive Unit)
29 Connection Port for Suction 31 Connection Port for Return 35 Plunger Type Pump Unit (Pump Unit)
37 Diaphragm type pump part 61 Pressure regulator 93 Stop part 97 Stabilization part

Claims (8)

  1. 　内燃機関の燃料供給装置であって、
    　燃料の加圧を行うポンプ部と、前記ポンプ部を駆動する駆動部と、前記ポンプ部へ吸込燃料を導く吸込用接続口体と、前記ポンプ部からのリターン燃料を吐出するリターン用接続口体とを備え、
    　前記ポンプ部を、内燃機関の吸気管の一部を構成する吸気管部材の外周部に、当該吸気管部材の軸心方向と交差するように支持させ、
    　前記吸気管部材と交差した前記ポンプ部の一方の端部に、前記駆動部を設け、
    　前記交差した前記ポンプ部の他方の端部に、前記吸込用接続口体およびリターン用接続口体を設けたことを特徴とする。     A fuel supply device for an internal combustion engine,
    A pump unit that pressurizes fuel; a drive unit that drives the pump unit; a suction connection port that guides suction fuel to the pump unit; and a return connection port that discharges return fuel from the pump unit And
    The pump part is supported on the outer peripheral part of the intake pipe member constituting a part of the intake pipe of the internal combustion engine so as to intersect the axial center direction of the intake pipe member,
    The drive unit is provided at one end of the pump unit intersecting the intake pipe member,
    The suction connection port body and the return connection port body are provided at the other end of the intersecting pump section.
  2. 　請求項１に記載の内燃機関の燃料供給装置であって、
    　前記ポンプ部は、プランジャの往復動により燃料を加圧する筒形状のプランジャ式ポンプ部を有して構成され、
    　前記駆動部は、前記プランジャを往復駆動するモータ部を有して構成され、
    　前記吸気管部材の外周部に前記プランジャ式ポンプ部が、同ポンプ部の軸心方向と前記吸気管部材の軸心方向とが交差するように支持され、
    　前記吸気管部材と交差した前記プランジャ式ポンプ部の一方の端部に前記モータ部が設けられ、
    　前記交差した前記プランジャ式ポンプ部の他方の端部に、前記吸込用接続口体およびリターン用接続口体が設けられることを特徴とする。     A fuel supply device for an internal combustion engine according to claim 1,
    The pump unit is configured to have a cylindrical plunger type pump unit that pressurizes fuel by reciprocating movement of the plunger,
    The drive unit includes a motor unit that reciprocates the plunger.
    The plunger-type pump part is supported on the outer periphery of the intake pipe member so that the axial center direction of the pump part and the axial center direction of the intake pipe member intersect.
    The motor unit is provided at one end of the plunger pump unit that intersects the intake pipe member,
    The suction connection port body and the return connection port body are provided at the other end portion of the intersecting plunger-type pump section.
  3. 　請求項２に記載の内燃機関の燃料供給装置であって、
    　前記モータ部は、前記プランジャ式ポンプ部の一方の端部から前記吸気管部材の周方向に沿って略Ｌ形に配置され、前記モータ部の重心位置を前記吸気管部材に寄せてあることを特徴とする。     A fuel supply device for an internal combustion engine according to claim 2,
    The motor unit is arranged in an approximately L shape along the circumferential direction of the intake pipe member from one end of the plunger pump unit, and the center of gravity of the motor unit is brought close to the intake pipe member. Features.
  4. 　請求項２ないし請求項３のいずれか一つに記載の内燃機関の燃料供給装置であって、
    　前記プランジャ式ポンプ部は、前記吸込用接続口体およびリターン用接続口体の配置される他方の端側に、吐出燃料を所定圧に保つプレッシャレギュレータを有することを特徴とする。     A fuel supply device for an internal combustion engine according to any one of claims 2 to 3,
    The plunger-type pump unit has a pressure regulator that maintains the discharged fuel at a predetermined pressure on the other end side where the suction connection port body and the return connection port body are disposed.
  5. 　請求項３に記載の内燃機関の燃料供給装置であって、
    　前記モータ部と前記プランジャ式ポンプ部は、それぞれ前記吸気管部材の外周部に最も接近させて配置してあることを特徴とする。     A fuel supply device for an internal combustion engine according to claim 3,
    The motor unit and the plunger-type pump unit are respectively arranged so as to be closest to the outer periphery of the intake pipe member.
  6. 　請求項５に記載の内燃機関の燃料供給装置であって、
    　前記モータ部と前記プランジャ式ポンプ部は、前記吸気管部材の軸心を中心とした円の軌跡上に配置されることを特徴とする。     A fuel supply device for an internal combustion engine according to claim 5,
    The motor unit and the plunger pump unit are arranged on a circular locus centering on an axis of the intake pipe member.
  7. 　請求項３ないし請求項６のいずれか一つに記載の内燃機関の燃料供給装置であって、
    　前記プランジャ式ポンプ部で加圧された燃料を前記吸気管部材内へ噴射するインジェクタを有し、さらに前記プランジャ式ポンプ部および前記モータ部を前記吸気管部材に支持する支持部を有し、
    　前記インジェクタは、前記吸気管部分と交差する前記プランジャ式ポンプ部の中間部分に配置されて、前記吸気管部分に噴射可能に設置され、
    　前記支持部は、前記インジェクタとは反対側のプランジャ式ポンプ部と吸気管部材とが交差する部分間を連結する止め部と、前記モータ部の前記プランジャ式ポンプ部を支点とした振れを抑える振れ止め部とを有して構成されることを特徴とする。     A fuel supply device for an internal combustion engine according to any one of claims 3 to 6,
    Having an injector for injecting fuel pressurized by the plunger type pump part into the intake pipe member, and further having a support part for supporting the plunger type pump part and the motor part on the intake pipe member,
    The injector is disposed in an intermediate portion of the plunger-type pump section that intersects the intake pipe portion, and is installed so as to be able to inject into the intake pipe portion.
    The support portion includes a stop portion that connects portions where the plunger-type pump portion on the opposite side of the injector and the intake pipe member intersect each other, and a swing that suppresses vibration about the plunger-type pump portion of the motor portion as a fulcrum. And a stop portion.
  8. 　請求項１ないし請求項７のいずれか一つに記載の内燃機関の燃料供給装置であって、
    　前記プランジャ式ポンプ部は、当該プランジャ式ポンプ部の吸い込みを助けるダイヤフラム式ポンプ部を有することを特徴とする。     A fuel supply device for an internal combustion engine according to any one of claims 1 to 7,
    The plunger-type pump unit includes a diaphragm-type pump unit that assists the suction of the plunger-type pump unit.
PCT/JP2013/050445 2012-01-19 2013-01-11 Fuel supply device for internal combustion engine WO2013108720A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201380006062.7A CN104066970B (en) 2012-01-19 2013-01-11 The fuel supply system of internal combustion engine
BR112014017402A BR112014017402A8 (en) 2012-01-19 2013-01-11 internal combustion engine fuel supply device
IN5757DEN2014 IN2014DN05757A (en) 2012-01-19 2013-01-11
PH12014501644A PH12014501644B1 (en) 2012-01-19 2014-07-17 Fuel supply device for internal combustion engine

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JP2012008888A JP5968628B2 (en) 2012-01-19 2012-01-19 Fuel supply device for internal combustion engine
JP2012-008888 2012-01-19

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WO2013108720A1 true WO2013108720A1 (en) 2013-07-25

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PCT/JP2013/050445 WO2013108720A1 (en) 2012-01-19 2013-01-11 Fuel supply device for internal combustion engine

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JP (1) JP5968628B2 (en)
CN (1) CN104066970B (en)
BR (1) BR112014017402A8 (en)
IN (1) IN2014DN05757A (en)
MY (1) MY168062A (en)
PH (1) PH12014501644B1 (en)
WO (1) WO2013108720A1 (en)

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH03117680A (en) * 1989-09-30 1991-05-20 Yamaha Motor Co Ltd Fuel feed device for two cycle engine
JPH0454974U (en) * 1990-09-20 1992-05-12
JP2003254187A (en) * 2002-02-28 2003-09-10 Honda Motor Co Ltd Fuel pump module of vehicle
JP2005105987A (en) * 2003-09-30 2005-04-21 Honda Motor Co Ltd Fuel injection device of internal combustion engine
JP2005133672A (en) * 2003-10-31 2005-05-26 Keihin Corp Fuel feeding device of vehicle
JP2011012649A (en) * 2009-07-06 2011-01-20 Aisan Industry Co Ltd Fuel injection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6971371B2 (en) * 2003-09-30 2005-12-06 Honda Motor Co., Ltd. Air-fuel mixing and delivery apparatus for an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03117680A (en) * 1989-09-30 1991-05-20 Yamaha Motor Co Ltd Fuel feed device for two cycle engine
JPH0454974U (en) * 1990-09-20 1992-05-12
JP2003254187A (en) * 2002-02-28 2003-09-10 Honda Motor Co Ltd Fuel pump module of vehicle
JP2005105987A (en) * 2003-09-30 2005-04-21 Honda Motor Co Ltd Fuel injection device of internal combustion engine
JP2005133672A (en) * 2003-10-31 2005-05-26 Keihin Corp Fuel feeding device of vehicle
JP2011012649A (en) * 2009-07-06 2011-01-20 Aisan Industry Co Ltd Fuel injection device

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BR112014017402A2 (en) 2017-06-13
PH12014501644A1 (en) 2014-10-13
IN2014DN05757A (en) 2015-04-10
CN104066970B (en) 2016-08-24
BR112014017402A8 (en) 2017-07-04
CN104066970A (en) 2014-09-24
MY168062A (en) 2018-10-11
JP5968628B2 (en) 2016-08-10
PH12014501644B1 (en) 2014-10-13
JP2013148002A (en) 2013-08-01

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