WO2019182122A1 - Module de pompe à combustible - Google Patents

Module de pompe à combustible Download PDF

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Publication number
WO2019182122A1
WO2019182122A1 PCT/JP2019/012140 JP2019012140W WO2019182122A1 WO 2019182122 A1 WO2019182122 A1 WO 2019182122A1 JP 2019012140 W JP2019012140 W JP 2019012140W WO 2019182122 A1 WO2019182122 A1 WO 2019182122A1
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WO
WIPO (PCT)
Prior art keywords
fuel
pump
module
module case
filter
Prior art date
Application number
PCT/JP2019/012140
Other languages
English (en)
Japanese (ja)
Inventor
洪太 中内
克洋 宇津木
康夫 直井
金子　哲也
田中　聡
聡一郎 奈尾
裕仁 鎌田
Original Assignee
本田技研工業株式会社
株式会社ケーヒン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社, 株式会社ケーヒン filed Critical 本田技研工業株式会社
Priority to BR112020018287-7A priority Critical patent/BR112020018287A2/pt
Priority to CN201980020617.0A priority patent/CN111902626B/zh
Publication of WO2019182122A1 publication Critical patent/WO2019182122A1/fr

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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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • 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
    • F02M37/20—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 characterised by means for preventing vapour lock
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/34—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements by the filter structure, e.g. honeycomb, mesh or fibrous
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/40—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements with means for detection of clogging

Definitions

  • a fuel pump having an inlet connected to a fuel filter and a pump unit in which an electric motor for driving the fuel pump is housed in a pump housing are provided in a module case disposed outside the fuel tank.
  • the present invention relates to a fuel pump module that is accommodated and has a vapor discharge hole formed in the pump housing for discharging vapor from a pump chamber of the fuel pump.
  • the pressure of the fuel discharged from the fuel pump is detected by the detection means, and the detection means detects a pressure lower than the pressure when the fuel filter is not clogged, so that the fuel filter is clogged.
  • a fuel pump module that is determined to have occurred is known from US Pat.
  • the fuel pump module disclosed in Patent Document 1 includes a pressure sensor that detects the discharge pressure of the fuel pump, and requires a complicated control system including an expensive pressure sensor, which is disadvantageous in terms of cost. There is a possibility.
  • the present invention has been made in view of such circumstances, and provides a fuel pump module that can detect clogging of a fuel filter at low cost without using an expensive pressure sensor or the like. Objective.
  • the present invention provides a fuel pump having an inlet connected to a fuel filter and a pump unit in which an electric motor for driving the fuel pump is housed in a pump housing.
  • a fuel pump module housed in a module case disposed in the fuel pump module and having a vapor discharge hole formed in the pump housing for discharging vapor from the pump chamber of the fuel pump, the pressure of fuel discharged from the fuel pump is adjusted.
  • a fuel storage chamber for storing fuel returned from the regulator stored in the module case is formed in the module case through the vapor discharge hole, and the fuel storage chamber is formed in the fuel tank from the fuel storage chamber.
  • a return pipe for returning the fuel containing is connected to the module case. Below the upper end of the open end into the module case of the return pipe, the first, wherein the vapor discharge hole is arranged.
  • the fuel filter is accommodated in the pump housing, the fuel storage chamber extends around the pump unit over the entire axial length of the pump unit, and the regulator.
  • the second feature is that the module case is continuously provided.
  • the present invention provides a first communication hole that communicates between the upper part of the first storage part and the upper part of the second storage part, and the first storage part.
  • a third feature is that a lower communication hole is formed between the lower part and the lower part of the second storage part.
  • the module case has a connection terminal for supplying electric power to the electric motor such that an inner end portion of the connection terminal faces the first storage portion.
  • the inner end portion of the connection terminal is disposed above the second communication hole having a larger cross-sectional area than the first communication hole. It is characterized by.
  • an annular unpurified chamber surrounding the fuel filter is formed in the module case independently of the second storage portion.
  • a fifth feature is that a fuel conduit for guiding fuel from the fuel tank is connected to the module case above the return pipe so as to communicate with the unpurified chamber.
  • the following phenomena (1) to (6) occur sequentially. That is, (1) When the fuel filter is clogged during operation of the fuel pump, the pressure loss in the fuel filter increases and the fuel in the fuel storage chamber flows backward from the vapor discharge hole to the pump chamber, and (2) from the fuel pump module When the amount of fuel supplied decreases and the amount of fuel return from the regulator decreases, the vapor discharge hole faces the gas phase in the fuel storage chamber.
  • the fuel pump suctions the fuel from the fuel filter by eliminating the vapor in the fuel filter when the pressure at the suction port of the fuel pump goes to a positive pressure.
  • the idling of the fuel pump is resolved and the fuel supply pressure rises momentarily.
  • the fuel is returned from the regulator and discharged from the vapor discharge hole including the vapor. Oil level of the fuel storage chamber is increased by the fuel, then the fuel supply pressure and return back to the state (1), and repeats the state of (1) to (6). In this way, the fuel supply pressure drops and returns to pulsation, which prompts the user to replace the fuel filter, and detects clogging of the fuel filter at low cost without using an expensive pressure sensor.
  • the oil level of the fuel in the fuel storage chamber rises to a position above the upper end of the open end of the return pipe to the module case due to the balance with the gas phase pressure in the upper part of the fuel storage chamber. If the vapor discharge hole is located above the upper end of the opening end of the return pipe to the module case, the fuel pump continues to idle while the vapor discharge hole faces the gas phase. The state of (1) cannot be returned from the state of (1), the state of (3) above is reached, and the fuel supply pressure does not return, so the vapor discharge hole is the upper end of the open end of the return pipe to the module case. It is necessary to be in a lower position.
  • the fuel storage chamber extends around the entire length in the axial direction of the pump unit around the pump unit, and around the fuel filter through the first storage portion.
  • the second storage section disposed in the fuel storage chamber the volume of the fuel storage chamber is relatively large, and the time from when the fuel filter is clogged until the vapor discharge hole reaches the gas phase in the fuel storage chamber is increased. It is possible to extend the operation time after the fuel filter is clogged, and when the fuel pump module according to the present invention is mounted on a vehicle, the fuel filter is clogged. The time during which the vehicle can travel without a sense of incongruity can be lengthened.
  • the upper portions of the first and second storage portions are communicated with each other through the first communication holes, and the lower portions of the first and second storage portions are communicated with each other through the second communication holes. Since the gas in the first reservoir can be discharged from the first communication hole through the second reservoir to the return pipe, the oil level in the fuel reservoir is more than the upper end of the open end of the return pipe to the module case. Even if the oil level in the fuel storage chamber fluctuates when the vehicle is tilting or accelerating / decelerating, the vapor discharge hole can always be positioned below the fuel oil level. It is possible to cause the pressure to drop and return to pulsation.
  • the second communication hole having a larger cross-sectional area than the first communication hole communicates the lower part of the first storage part and the lower part of the second storage part.
  • the water accumulated in the first reservoir through the fuel pump from the inside can be discharged from the second communication hole to the return pipe through the second reservoir, and the inside of the connection terminal located above the second communication hole.
  • the ends are not immersed in water, and it is possible to avoid adverse effects such as corrosion caused by water on the connection terminals.
  • FIG. 1 is a left side view of the motorcycle according to the first embodiment.
  • FIG. 2 is a side view of the fuel tank, canister, and fuel pump module.
  • FIG. 3 is a longitudinal sectional view of the fuel pump module, and is a sectional view taken along line 3-3 in FIG.
  • First embodiment 4 is a cross-sectional view taken along line 4-4 of FIG.
  • First embodiment 5 is a cross-sectional view taken along line 5-5 of FIG.
  • First embodiment 6 is a cross-sectional view taken along line 6-6 of FIG.
  • FIG. 7 is a diagram showing changes in pressure at the suction port, the vapor discharge hole, and the discharge port of the fuel pump module.
  • FIG. 1 is a left side view of the motorcycle according to the first embodiment.
  • FIG. 2 is a side view of the fuel tank, canister, and fuel pump module.
  • FIG. 3 is a longitudinal sectional view of the fuel pump module, and is a sectional view taken along line 3-3 in FIG.
  • First embodiment 4 is
  • FIG. 8 is a left side view of the motorcycle according to the second embodiment.
  • FIG. 9 is a side view of the fuel tank, canister, and fuel pump module.
  • FIG. 10 is a simplified diagram showing a fuel tank, a fuel filter, and a fuel pump module.
  • FIG. 11 is a simplified cross-sectional view of the fuel pump module in the direction along line 11-11 in FIG. (Second Embodiment)
  • front and rear, left and right, and top and bottom are directions as viewed from a passenger riding a motorcycle.
  • a vehicle body frame F of a scooter type motorcycle includes a front fork 11 that supports a front wheel WF and the front fork 11
  • An internal combustion engine E that includes a head pipe 13 that supports a steering handle 12 connected to the fork 11 at a front end and that drives the rear wheel WR is an engine body of the internal combustion engine E. 14 is mounted on the vehicle body frame F so as to be supported on the vehicle body frame F so as to be swingable up and down in front of the rear wheel WR.
  • the engine body 14 is provided with a transmission case 15 that houses a transmission device (not shown) that transmits the output of the engine body 14 to the rear wheel WR.
  • a transmission case 15 is connected to the rear end of the transmission case 15.
  • the rear wheel WR is pivotally supported, and a rear cushion unit 16 is provided between the vehicle body frame F and the transmission case 15.
  • a fuel injection valve 18 is attached to the intake system 17 of the internal combustion engine E, and an air cleaner 19 that constitutes an upstream end of the intake system 17 is disposed above the transmission case 15 while the transmission case 15 is arranged. 15 is supported.
  • the vehicle body frame F and a part of the internal combustion engine E are covered with a vehicle body cover 20 having a footrest portion 21 on which a passenger's foot is placed and supported by the vehicle body frame F.
  • a tandem type riding seat 22 disposed behind the footrest 21 is disposed on the vehicle body cover 20.
  • a fuel tank 23 is disposed above the rear wheel WR, and the fuel tank 23 is covered from above at the rear portion of the riding seat 22. Supported by F.
  • a canister 24 is disposed below the fuel tank 23, and a fuel pump module 26 is disposed outside the fuel tank 23, in this embodiment, below the fuel tank 23 and below the canister 24.
  • the canister 24 and the fuel pump module 26 are supported by the vehicle body frame F.
  • the fuel pump module 26 includes a module case 27 disposed below the fuel tank 23, a fuel pump 29 having a suction port 34 connected to a fuel filter 32, and the fuel pump.
  • the electric motor 28 for driving the motor 29 includes a pump unit 31 that is housed in the pump housing 30, and a regulator 33 that adjusts the pressure of the fuel discharged from the fuel pump 29.
  • the pump unit 31 is accommodated in the module case 27.
  • the fuel filter 32 and the regulator 33 are also accommodated in the module case 27.
  • a suction pipe 35 is formed at one end portion of the pump housing 30 to form a suction port 34 for sucking fuel into the fuel pump 29, and the fuel pump is disposed at the other end portion of the pump housing 30.
  • a discharge pipe 37 that forms a discharge port 36 for discharging the fuel that has flowed from 29 through the pump housing 30 is provided.
  • the module case 27 is arranged such that its longitudinal direction is along the vehicle width direction, and one end thereof is closed by a support wall portion 38 a having a suction side fitting hole 43 into which the suction pipe 35 is fitted.
  • a synthetic resin case main body 38 formed into a bottomed cylindrical shape and a synthetic resin case main body 38 having a discharge side fitting hole 44 for fitting the discharge pipe 37 and closing the other end of the case main body 38.
  • a filter case 40 made of synthetic resin which is formed in a bottomed cylindrical shape that is open on the opposite side to the case main body 38 and is joined to one end of the case main body 38 by welding, for example, and the filter Covering the filter cap 41 that is detachably elastically engaged with the filter case 40 so that the opening end of the case 40 is liquid-tightly closed, the other end of the case main body 38, and the wall member 39.
  • the fuel filter 32 is held by the filter holding frame 45 and is accommodated between the filter case 40 and the filter cap 41.
  • the filter holding frame 45 is configured such that a short cylindrical first holding cylinder portion 45a fitted to the inner periphery of the end of the fuel filter 32 having a cylindrical shape on the pump unit 31 side is continuously provided on the inner periphery.
  • a ring-plate-shaped first lid plate portion 45b that abuts the end portion of the fuel filter 32 on the pump unit 31 side and an inner periphery of the end portion of the filter holding frame 45 on the opposite side to the pump unit 31 are fitted.
  • a short cylindrical second holding cylinder portion 45c is provided so as to have a disk-like second lid plate portion 45d that abuts the end of the fuel filter 32 opposite to the pump unit 31. Configured as follows.
  • An annular unpurified chamber 46 is formed between the filter case 40 and the filter cap 41 and the fuel filter 32, and the fuel introduced into the unpurified chamber 46 is filtered by the fuel filter 32. It flows into the fuel filter 32.
  • the support wall 38a at one end of the case main body 38 is integrally provided with a connecting pipe portion 47 that is coaxially connected to a suction side fitting hole 43 into which the suction pipe 35 is fitted.
  • a suction side fitting hole 43 into which the suction pipe 35 is fitted.
  • a pressure adjusting passage 48 is formed for flowing the fuel discharged from the discharge port 36 of the pump unit 31.
  • the pressure adjusting passage 48 is connected to the regulator 33 that adjusts the fuel pressure in the pressure adjusting passage 48.
  • the regulator 33 is formed integrally with the other end of the case main body 38. Is accommodated in a support wall 38a (see FIG. 2) that bulges in the direction.
  • a first discharge passage 49 communicating with the pressure adjusting passage 48 is formed in the case main body 38 along the longitudinal direction of the case main body 38 on the side of the pump unit 31, and in the filter case 40, A second discharge passage 50 connected to the first discharge passage 49 is formed, and a discharge connection pipe 51 protruding upward from the filter case 40 while being connected to the second discharge passage 50 is integrally provided.
  • the discharge connection pipe 51 is connected to the fuel injection valve 18 in the intake system 17 of the internal combustion engine E via a fuel hose (not shown).
  • a vapor discharge hole 53 for discharging vapor from the pump chamber 52 of the fuel pump 29 is formed at one end of the pump housing 30 on the support wall 38a side.
  • a fuel storage chamber 54 for storing fuel returned from the regulator 33 is formed in the module case 27 so as to communicate with the vapor discharge hole 53.
  • a return pipe 56 for returning the fuel containing the vapor from the fuel storage chamber 54 into the fuel tank 23 extends into the filter case 40 of the module case 27 so as to become higher as the distance from the filter case 40 increases.
  • the vapor discharge hole 53 is disposed below the upper end of the opening end 56 a of the return pipe 56 to the module case 27. That is, as shown in FIG. 4, the vapor discharge hole 53 is disposed below a horizontal plane HL passing through the upper end of the opening end 56 a of the return pipe 56.
  • a one-way valve 57 for preventing a back flow of fuel from the fuel tank 23 toward the fuel storage chamber 54 is disposed in the return pipe 56.
  • the fuel reservoir chamber 54 extends around the entire length of the pump unit 31 in the axial direction around the pump unit 31 and communicates with the first reservoir 58 that stores fuel returned from the regulator 33 and the first reservoir 58. And a second reservoir 59 disposed around the fuel filter 32.
  • the second storage part 59 is formed in the filter case 40 independently of the unpurified chamber 46 while sandwiching the support wall part 38a of the case main body 38 with the first storage part 58.
  • the return pipe 56 is connected to the filter case 40 so as to communicate with the second storage part 59, and the vapor discharge hole 53 is connected to the second storage part 59 of the first storage part 58. It is arranged facing the end of the side.
  • a first communication hole 60 that communicates between the upper portion of the first reservoir 58 and the upper portion of the second reservoir 59, the lower portion of the first reservoir 58, and the support wall 38 a of the module case 27.
  • a second communication hole 61 connecting the lower portions of the second reservoir 59 is formed, and the second communication hole 61 is formed with a larger cross-sectional area than the first communication hole 60.
  • a connector portion 38c protruding upward is integrally formed on the upper side of the case main body 38 of the module case 27 on the cover member 42 side, and a plurality of connectors for supplying electric power to the electric motor 28 are formed.
  • the module is such that the connection terminal 62 faces the inner end 62a of the connection terminal 62 into the first storage part 58 while arranging the outer end of the connection terminal 62 in the connector part 38c.
  • the module case 27 is provided through the case 27. In this embodiment, the module case 27 is provided above the module case 27, that is, above the case main body 38.
  • a fuel conduit 63 for guiding fuel from the fuel tank 23 is extended and connected so as to become an upper position as the distance from the filter case 40 increases.
  • the conduit 63 is disposed above the return pipe 56.
  • One end of a first fuel hose 64 is connected to the return pipe 56, and the other end of the first fuel hose 64 is connected to a return side connecting pipe (see FIG. (Not shown).
  • One end of a second fuel hose 66 is connected to the fuel conduit 63, and the other end of the second fuel hose 66 is connected to a supply side connection pipe 67 that is connected to the bottom of the fuel tank 23. Connected.
  • the module case 27 of the fuel pump module 26 is disposed below the fuel tank 23, and the electric motor 28 and the electric motor are included in the module case 27.
  • a fuel pump 29 driven by a pump 28 is housed in a pump housing 30, connected to a regulator 33 that adjusts the pressure of fuel discharged from the fuel pump 29, and an intake port 34 of the fuel pump 29.
  • a fuel storage chamber 54 communicating with a vapor discharge hole 53 formed in the pump housing 30 so as to discharge vapor from the pump chamber 52 of the fuel pump 29.
  • a return pipe 56 formed to return the fuel containing the vapor from the fuel storage chamber 54 into the fuel tank 23 is connected to the module case 27, and an opening end 56 a of the return pipe 56 to the module case 27 is formed.
  • the vapor discharge hole 53 is disposed below the upper end.
  • the fuel in the fuel storage chamber 54 flows backward from the vapor discharge hole 53 to the pump chamber 52, and (2) when the fuel supply amount from the fuel pump module 26 decreases and the fuel return amount from the regulator 33 decreases, the fuel storage The vapor discharge hole 53 faces the gas phase in the chamber 54, and (3) the air flows into the pump chamber 52 from the vapor discharge hole 53 and the fuel pump 29 idles. (4) When the pressure at the suction port 34 of the fuel pump 29 goes to a positive pressure as shown by the chain line in FIG. 7, the vapor in the fuel filter 32 disappears, and the fuel pump 29 becomes a fuel filter. (5) The idling of the fuel pump 29 is eliminated and the fuel supply pressure rises instantaneously.
  • the fuel supply pressure drops and returns to pulsation, and the motorcycle driver can be urged to replace the fuel filter 32.
  • the fuel filter 32 is clogged without using an expensive pressure sensor. Can be detected at low cost.
  • the oil level of the fuel in the fuel storage chamber 54 is adjusted by the balance between the pressure of the upper gas phase in the fuel storage chamber 54 and the opening end 56 a of the return pipe 56 to the module case 27. If the vapor discharge hole 53 is located above the upper end of the opening end 56a of the return pipe 56 to the module case 27, the vapor discharge hole 53 remains facing the gas phase. Since the fuel pump 29 keeps idling, the state (6) cannot be returned to the state (1), and the state (3) is reached. It is necessary that the hole 53 is located below the upper end of the opening end 56 a of the return pipe 56 to the module case 27.
  • the fuel storage chamber 54 extends around the entire length of the pump unit 31 around the pump unit 31, and stores the fuel returned from the regulator 33, and the first storage portion 58. And a second reservoir 59 disposed around the fuel filter 32, and the return pipe 56 is connected to the module case 27 so as to communicate with the second reservoir 59.
  • the volume of the chamber 54 can be made relatively large, and the time from when the fuel filter 32 is clogged until the vapor discharge hole 53 reaches the gas phase in the fuel storage chamber 54 can be lengthened. The operation time after the occurrence of clogging can be extended, and the motorcycle can be run without a sense of incongruity after the fuel filter 32 is clogged. It can be long between.
  • the module case 27 has a first communication hole 60 that communicates between the upper part of the first reservoir 58 and the upper part of the second reservoir 59, and the lower part of the first reservoir 58 and the second reservoir 59. Since the second communication hole 61 communicating between the lower portions of the first storage portion 58 is formed, the gas in the first storage portion 58 can be discharged from the first communication hole 60 to the return pipe 56 through the second storage portion 59. Therefore, the oil level in the fuel storage chamber 54 can be raised from the upper end of the opening end 56a of the return pipe 56 to the module case 27, and the oil in the fuel storage chamber 54 can be used when the vehicle is inclined or accelerated / decelerated. Even if the surface fluctuates, the vapor discharge hole 53 can always be positioned below the oil level of the fuel, and the fuel supply pressure can be reduced and returned to pulsation.
  • connection terminal 62 for supplying electric power to the electric motor 28 passes through the module case 27 so that the inner end 62a of the connection terminal 62 faces the first storage portion 58, and the module case 27 27, and the inner end 62a of the connection terminal 62 is disposed above the second communication hole 61 having a larger cross-sectional area than the first communication hole 60.
  • the water accumulated in the first reservoir 58 through the fuel pump 29 can be discharged from the second communication hole 61 to the return pipe 56 via the second reservoir 59 and located above the second communication hole 61.
  • the inner end 62a of the connecting terminal 62 is not soaked in water, and adverse effects such as corrosion caused by water on the connecting terminal 62 can be avoided.
  • FIG. 7 shown in the description of the first embodiment in addition to FIG. 8 to FIG. 11, but the first embodiment shown in FIG. 1 to FIG.
  • the portions corresponding to the above embodiments are only shown with the same reference numerals, and detailed description thereof is omitted.
  • a canister 24 extending in the vehicle front-rear direction is disposed below the fuel tank 23 so as not to overlap the fuel tank 23 in a side view.
  • a fuel pump module 70 is disposed below the fuel tank 23 and below the canister 24.
  • the fuel pump module 70 includes a module case 71 disposed below the fuel tank 69, a fuel pump 74 having an inlet 73 connected to the fuel filter 72, and the fuel pump module 70.
  • a pump unit 77 in which an electric motor 75 for driving the fuel pump 74 is housed in a pump housing 76 and a regulator 78 for adjusting the pressure of fuel discharged from the fuel pump 74 are provided.
  • the module case 71 is accommodated.
  • the module case 71 is formed in a cylindrical shape so that its longitudinal direction is along the vehicle width direction, and is disposed below the fuel tank 23 and above the internal combustion engine E in a side view as shown in FIG.
  • the fuel is disposed behind the fuel injection valve 18 of the internal combustion engine E and ahead of the fuel tank 23 and constitutes a part of the pump unit 77 housed in the module case 71.
  • the pump 74 is disposed between the fuel tank 23 and the internal combustion engine E in the vertical direction, and is disposed between the fuel injection valve 18 and the fuel tank 23 in the vehicle front-rear direction.
  • the pump housing 76 of the pump unit 77 is formed in a substantially cylindrical shape, and is accommodated in the module case 71 so that the rotation axis C of the fuel pump 74 and the electric motor 75 is along the vehicle width direction.
  • the fuel filter 72 is disposed outside the module case 71 and below the fuel tank 69 on one side in the vehicle width direction with respect to the canister 24 located below the fuel tank 23, from the fuel tank 69.
  • the fuel is guided to the fuel filter 72 through a fuel suction hose 90 and a first fuel suction pipe 91 provided in the fuel filter 72 and connected to the fuel suction hose 90.
  • the passed fuel is guided to the suction port 73 of the fuel pump 74 through a second fuel suction pipe 80 that penetrates the module case 71 and the pump housing 76.
  • a fuel storage chamber 81 is formed in the module case 71, and the pump unit 77 is accommodated in the fuel storage chamber 81.
  • the regulator 78 is provided at the lower end portion of the second discharge pipe 83 connected to the one discharge pipe 82 and extending in the vertical direction.
  • the second discharge pipe 82 extends upward through the upper side wall of the module case 71, and is connected to the fuel injection valve 18 of the internal combustion engine E via a third fuel hose 84. .
  • a vapor discharge hole 85 for discharging vapor from a pump chamber (not shown) of the fuel pump 74 to the fuel storage chamber 81 is formed in the pump housing 76, and the fuel storage chamber 69 has the fuel storage chamber 69.
  • a return pipe 87 for returning the fuel containing the vapor from 51 is provided in the module case 71 on one side in the vehicle width direction.
  • the vapor discharge hole 85 is disposed near the return pipe 87 with respect to a virtual vertical plane VP passing through the center of the fuel pump 74 having a substantially cylindrical shape, and the module case 71.
  • the module case 71 is disposed below the upper end of the open end 87a of the return pipe 87. That is, as shown in FIG. 11, the vapor discharge hole 85 is disposed below a horizontal plane HLA passing through the upper end of the opening end 87 a of the return pipe 87.
  • the return pipe 87 is connected to the module case 71 so as to become higher as the distance from the module case 71 increases, and to extend rearward in the vehicle front-rear direction.
  • a one-way valve 93 for preventing the reverse flow of fuel from the fuel to the fuel storage chamber 81 side is provided.
  • One end portion of a fourth fuel hose 88 is connected to the return pipe 87, and the other end portion of the fourth fuel hose 88 is connected to a return side connection pipe 89 connected to the bottom of the fuel tank 23. Connected.
  • the fuel from the fuel tank 23 is guided to the fuel filter 72 and purified by the fuel filter 72, and the purified fuel is sucked into the fuel pump 74 from the fuel filter 72. Inhaled into the mouth 73.
  • the fuel boosted in the fuel pump 74 is discharged from the first discharge pipe 82, and the fuel regulated by the regulator 78 passes from the second discharge pipe 83 to the fuel injection valve 18 through the third fuel hose 84. Sent. Further, the fuel that becomes unnecessary due to the pressure regulation by the regulator 78 is returned from the regulator 78 to the fuel storage chamber 81.
  • the module case 71 of the fuel pump module 70 is disposed below the fuel tank 23 and is connected to the fuel filter 72 in the module case 71.
  • a pump unit 77 in which a fuel pump 74 and an electric motor 75 for driving the fuel pump 74 are housed in a pump housing 76 and a regulator 78 for adjusting the pressure of fuel discharged from the fuel pump 74 are housed.
  • a fuel storage chamber 81 communicating with a vapor discharge hole 85 formed in the pump housing 76 so as to discharge vapor from the fuel pump 74 is formed in the module case 71 so as to store fuel returned from the regulator 78.
  • the fuel storage chamber 8 A return pipe 87 for returning the fuel containing the vapor is connected to the module case 71, and the vapor discharge hole 85 is disposed below the upper end of the opening end 87a of the return pipe 87 to the module case 71.
  • the fuel is sucked from 72, (e) idling of the fuel pump 74 is canceled and the fuel supply pressure rises instantaneously, (f) the return of fuel from the regulator 78, and the vapor discharge hole 85 including the vapor.
  • the oil level in the fuel storage chamber 81 rises due to the discharged fuel, and then returns to the state (a), the fuel supply pressure is restored, and the states (a) to (f) are repeated.
  • the pulsation of the fuel supply pressure is lowered and returned, and the driver of the motorcycle can be prompted to replace the fuel filter 72.
  • the fuel filter 72 is clogged without using an expensive pressure sensor. Can be detected at low cost.
  • the oil level of the fuel in the fuel storage chamber 81 is adjusted by the balance between the pressure of the upper gas phase in the fuel storage chamber 81 and the opening end 87 a of the return pipe 87 to the module case 71. If the vapor discharge hole 85 is located above the upper end of the opening end 87a of the return pipe 87 to the module case 71, the vapor discharge hole 85 remains facing the gas phase. Since the fuel pump 74 continues idling, it cannot return to the state (a) from the state (f), and the state (c) is reached, and the fuel supply pressure does not return. It is necessary that the hole 85 is located below the upper end of the opening end 87a of the return pipe 87 to the module case 71.
  • the rotation axis C of the fuel pump 74 is along the vehicle width direction.
  • the suction port 73 is formed at one end of the fuel pump 74 in the vehicle width direction in the vehicle width direction, and the return pipe 87 is formed. Since the module case 71 is provided on one side in the vehicle width direction, the fuel pump 74 and thus the fuel pump module 70 can be made compact in the vehicle longitudinal direction, and the return pipe 87 and the second fuel can be reduced.
  • the suction pipe 80 can be easily attached.
  • the canister 24 extending in the longitudinal direction of the vehicle is arranged so as not to overlap the fuel tank 23 in a side view, the fuel tank 23 and the canister 24 can be arranged in a compact manner.
  • the third fuel hose 84 that guides fuel from the fuel pump 74 to the fuel injection valve 18 of the internal combustion engine E is shortened.
  • the third fuel hose 84 can be shortened by arranging the fuel pump 74 between the fuel injection valve 18 and the fuel tank 23 in the vehicle longitudinal direction.
  • the return pipe 87 is made higher toward the rear in the vehicle front-rear direction while becoming higher as the distance from the module case 71 increases. Since it extends continuously to the module case 71 so as to extend, the fourth fuel hose 88 connecting the return pipe 87 and the return side connection pipe 89 connected to the bottom of the fuel tank 23 is shortened. Can do.
  • the vapor discharge hole 85 is disposed near the return pipe 87 with respect to a virtual vertical plane VP passing through the central axis C of the fuel pump 74 having a substantially cylindrical shape, and the module case 71 is mounted on the vehicle. Since it is disposed below the upper end of the open end 87a of the return pipe 87 to the module case 71, the vapor discharge hole 85 is provided in the return pipe even when the fuel pump 74 is tilted left and right due to a change in the attitude of the motorcycle. It becomes easy to hold

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un module de pompe à combustible comprenant : un ensemble pompe, doté d'une pompe à combustible comportant un orifice d'aspiration relié à un filtre à combustible et d'un moteur électrique, tous les deux logés dans un carter de pompe, l'ensemble pompe étant logé à l'intérieur d'une enveloppe de module agencée à l'extérieur d'un réservoir de combustible ; et un trou d'évacuation de vapeur permettant d'évacuer de la vapeur d'une chambre de la pompe à combustible, le trou étant formé dans le carter de pompe. Une chambre (54) de retenue de combustible, permettant de stocker le combustible retourné par un régulateur (33), est formée à l'intérieur de l'enveloppe (27) de module et en communication avec le trou d'évacuation de vapeur (53). Un tuyau de retour (56), permettant de retourner la vapeur contenant du combustible de la chambre (54) de retenue de combustible au réservoir de combustible, est disposé adjacent à l'enveloppe (27) de module. Le trou d'évacuation de vapeur (53) est agencé en dessous d'une extrémité supérieure d'une extrémité d'ouverture (56a) du tuyau de retour (56) ouvrant vers l'enveloppe (27) de module. Ainsi, le besoin d'un capteur de pression coûteux, ou analogue, est éliminé, permettant de détecter le colmatage du filtre à combustible à un faible coût.
PCT/JP2019/012140 2018-03-23 2019-03-22 Module de pompe à combustible WO2019182122A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR112020018287-7A BR112020018287A2 (pt) 2018-03-23 2019-03-22 Módulo de bomba de combustível
CN201980020617.0A CN111902626B (zh) 2018-03-23 2019-03-22 燃料泵模块

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-056394 2018-03-23
JP2018056394A JP6640261B2 (ja) 2018-03-23 2018-03-23 燃料ポンプモジュール

Publications (1)

Publication Number Publication Date
WO2019182122A1 true WO2019182122A1 (fr) 2019-09-26

Family

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Application Number Title Priority Date Filing Date
PCT/JP2019/012140 WO2019182122A1 (fr) 2018-03-23 2019-03-22 Module de pompe à combustible

Country Status (4)

Country Link
JP (1) JP6640261B2 (fr)
CN (1) CN111902626B (fr)
BR (1) BR112020018287A2 (fr)
WO (1) WO2019182122A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114728855B (zh) 2019-11-28 2023-06-06 株式会社德山 氮化硅烧结体的制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014092142A (ja) * 2012-11-06 2014-05-19 Keihin Corp 燃料供給装置
JP2017180174A (ja) * 2016-03-29 2017-10-05 株式会社ケーヒン フューエルポンプモジュール
JP6444481B1 (ja) * 2017-12-14 2018-12-26 株式会社ケーヒン 燃料供給装置の製造方法
JP6467489B1 (ja) * 2017-12-14 2019-02-13 株式会社ケーヒン 燃料供給装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029049A (ja) * 2011-07-27 2013-02-07 Mitsubishi Electric Corp 車両用燃料供給装置
JP5999945B2 (ja) * 2012-03-22 2016-09-28 株式会社ケーヒン 燃料供給装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014092142A (ja) * 2012-11-06 2014-05-19 Keihin Corp 燃料供給装置
JP2017180174A (ja) * 2016-03-29 2017-10-05 株式会社ケーヒン フューエルポンプモジュール
JP6444481B1 (ja) * 2017-12-14 2018-12-26 株式会社ケーヒン 燃料供給装置の製造方法
JP6467489B1 (ja) * 2017-12-14 2019-02-13 株式会社ケーヒン 燃料供給装置

Also Published As

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CN111902626A (zh) 2020-11-06
JP6640261B2 (ja) 2020-02-05
CN111902626B (zh) 2022-05-06
BR112020018287A2 (pt) 2020-12-29
JP2019167879A (ja) 2019-10-03

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