EP1160446A2 - Module de pompe à carburant - Google Patents

Module de pompe à carburant Download PDF

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Publication number
EP1160446A2
EP1160446A2 EP01112720A EP01112720A EP1160446A2 EP 1160446 A2 EP1160446 A2 EP 1160446A2 EP 01112720 A EP01112720 A EP 01112720A EP 01112720 A EP01112720 A EP 01112720A EP 1160446 A2 EP1160446 A2 EP 1160446A2
Authority
EP
European Patent Office
Prior art keywords
fuel
functional portion
pumping
passage
functional
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP01112720A
Other languages
German (de)
English (en)
Other versions
EP1160446B1 (fr
EP1160446A3 (fr
Inventor
Masahiko Narushima
Shinya Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsuba Corp
Original Assignee
Mitsuba Corp
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 Mitsuba Corp filed Critical Mitsuba Corp
Publication of EP1160446A2 publication Critical patent/EP1160446A2/fr
Publication of EP1160446A3 publication Critical patent/EP1160446A3/fr
Application granted granted Critical
Publication of EP1160446B1 publication Critical patent/EP1160446B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks
    • 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
    • F02M37/50—Filters arranged in or on fuel tanks

Definitions

  • the present invention relates to a fuel pump module of an in-tank type, and in particular to a fuel pump module which achieves miniaturization of the fuel tank module in automobiles and the like.
  • a fuel pump module is mounted in a fuel tank, serves as a type of sub tank for the fuel tank, and supplies fuel accommodated in the fuel tank to an engine via a discharge port. That is, the fuel pump module comprises a pump for pumping fuel, a strainer linked to the pump via a first fuel passage, and a second fuel passage connected to the strainer and guiding the fuel to the engine. The second fuel passage is connected to the strainer at one end portion thereof, and has a discharge port at the other end portion thereof. And, the fuel pump module is integrally formed as a whole.
  • the pump is provided with a backflow-preventing functional portion in order to prevent the fuel flowing through the first fuel passage from back-flowing from the strainer to the pump. Furthermore, in order to keep fuel pressure of the fuel flowing through the second fuel passage constant, a pressure-regulating functional portion is provided at the discharge port (or at the other end portion of the second fuel passage).
  • An object of the present invention is to provide a fuel pump module that can be miniaturized, and handled economically with low cost even if some parts therein fail.
  • a fuel pump module according to the present invention comprises a pumping functional portion having only pump function, and other functional portions located separately from the pumping functional portion, wherein the pumping functional portion and the other functional portions are again integrated into one after being divided per a functional unit.
  • the pumping functional portion has only pump function.
  • Other functional portions other than the pumping functional portion are arranged separately from the pumping functional portion. After the pumping functional portion and the other functional portions are divided into as separated members, the pumping functional portion and the other functional portions are again integrated into one. Therefore, even after the pumping functional portion and the other functional portions are divided per a function unit, an after-integration structure has the same function as a before-division structure.
  • another fuel pump module comprises: a pumping functional portion having only pump function and pumping fuel accommodated in a reservoir; a strainer linked to the pumping functional portion via a first fuel passage; a backflow-preventing functional portion attached to the first fuel passage and preventing backflow of fuel which flows through the first fuel passage; a second fuel passage for guiding the fuel from the strainer to an engine; and a pressure-regulating functional portion connected to the second fuel passage and keeping fuel pressure in the second fuel passage constant, wherein the pumping functional portion, the backflow- preventing functional portion, and the pressure-regulating functional portion are again integrated into one after being divided per a single-functional unit.
  • the pumping functional portion for pumping the fuel in the reservoir, the backflow-preventing functional portion for preventing backflow of the fuel which flows through the first fuel passage, and the pressure-regulating functional portion for keeping the fuel pressure in the second fuel passage constant are fully divided per a single-functional unit. And then, the pumping functional portion, the backflow-preventing functional portion, and the pressure-regulating functional portion are integrated into one. Therefore, even if the functions required for the fuel pump module are divided one by one, an after-integration structure has the same function as a before-division structure by again integrating them into one.
  • FIG. 1 is a plane view showing one embodiment of the fuel pump module according to the present invention.
  • FIG. 2 is a plane view showing the lower case of FIG. 1.
  • FIG. 3 is a cross section taken along line N-N under the state that the conjunction cover is removed in FIG. 1.
  • FIG. 4 is a plane view showing the upper cover of FIG. 1.
  • FIG. 5 is a cross section taken along line Q-Q under the state that the conjunction cover is removed in FIG. 1.
  • FIG. 6 is a cross section taken along line M-M of FIG. 1.
  • FIG. 7 is a side view showing the state that the fuel pump module of FIG. 1 is mounted to a fuel tank.
  • An essential concept of the present invention is the conception that a multi-functional portion having many functions is fully divided per a single-functional unit to provide a plurality of single-functional portions, and then the single-functional portions are again integrated into one.
  • the multi-functional portion may be divided into several plural-functional portions, and then the plural-functional portions may be again integrated into one.
  • FIGs. 1 to 7 relate to one embodiment of the fuel pump module according to the present invention.
  • this fuel pump module 1 is constituted such that a pumping functional portion 2, a backflow-preventing functional portion 3, and a pressure-regulating functional portion 4 which are fully separated therefrom per a single-functional unit are integrated in a lower case 5 into one.
  • this fuel pump module 1 comprises the box-shaped lower case 5, an upper case 6 capped on the lower case 5, and a conjunction cover 7 to be attached to the upper case 6.
  • a fuel pump 10, a strainer 11, and a pressure regulator 12 are respectively located in the lower case 5.
  • the pumping functional portion 2 corresponds to the fuel pump 10 in the present embodiment, any members having the same function as the fuel pump 10 may be used instead of the fuel pump 10.
  • the pressure-regulating functional portion 4 corresponds to the pressure regulator 12, any members having the same function as the pressure regulator 12 may be used instead of the pressure regulator 12.
  • the lower case 5 comprises a bottom wall 20, a peripheral wall 21 integrally provided on the peripheral edge of the bottom wall 20, and a fuel inlet 25 formed in the peripheral wall 21.
  • a regulator mounting portion 22, a strainer mounting portion 23, and a sensor mounting portion 24 are respectively formed in the bottom wall 21.
  • the lower case 5 functions as a reservoir 8 for the fuel, the reservoir 8 may be formed so as to be separated from the lower case 5 and function as only a reservoir.
  • the pressure regulator 12 is installed to the regulator mounting portion 22, the strainer 11 the strainer mounting portion 23, and a thermistor 13 the sensor mounting portion 24.
  • the peripheral wall 21 stands up from the bottom wall 20.
  • a second fuel passage 26 is integrally provided in the bottom wall 20 so as to cross the bottom wall 20 at approximately right angles.
  • One end of the second fuel passage 26 is connected to the strainer mounting portion 23, and the other end thereof extends to the outside of the lower case 5 to form a discharge port 27.
  • a fuel pipe 28 for guiding the fuel from the second fuel passage 26 to an engine (not shown).
  • the regulator mounting portion 22 is connected via an auxiliary passage 29.
  • the pressure regulator 12 may be directly provided in the intermediate portion of the second fuel passage 26.
  • the upper case 6 comprises a bottom wall 31, and a peripheral wall 32 vertically formed in continuation with the periphery of the bottom wall 31.
  • a regulator inserting hole 33, a strainer inserting hole 34, a sensor inserting hole 35, and a pump inserting hole 36 are respectively formed in the bottom wall 31. Any means for capping the upper case 6 on the lower case 5 are available.
  • a pushing portion 37 is integrally formed in the bottom cover 31 and downwardly projects from the periphery of the regulator inserting hole 33.
  • the pushing portion 37 downwardly pushes the pressure regulator 12 mounted to the regulator mounting portion 22.
  • the strainer 11 is inserted into the strainer inserting hole 34, and the thermistor 13 is inserted into the sensor inserting hole 35 and secured therein.
  • the thermistor 13 corresponds to a remaining amount alarming sensor for the fuel reserved in a fuel tank 14. That is, this thermistor 13 recognizes a temperature change of the fuel tank 14 shown in FIG. 7 as a resistance change, and senses the remaining amount of fuel by measuring the resistance change.
  • a protecting tube 38 is integrally formed with the bottom wall 31 and downwardly projects from the peripheral edge of the pump inserting hole 36.
  • the fuel pump 10 is inserted into the protecting tube 38 from the pump inserting hole 36 and is held therein.
  • a pump filter 39 is detachably provided on the other end of the fuel pump 10.
  • the pressure regulator 12 serves to regulate pressure of the fuel present in the second fuel passage 26, and return excess fuel remaining in the second fuel passage 26 to the reservoir 8. That is, when an engine (not shown) of a vehicle or the like rotates, the fuel is supplied to the engine via the second fuel passage 26 and the fuel pipe 28. However, when the engine is stopped, excel fuel remains in the second fuel passage 26 and (or) the fuel pipe 28. Then, the excel fuel back-flows in the fuel pipe 28 and the second fuel passage 26, so that there is the drawback that fuel pressure of the excess fuel lowers and (or) that air or the like is mixed with the excess fuel. As a result of this, the engine is difficult to drive at restarting of the engine.
  • the pressure regulator 12 can prevent the excess fuel from back-flowing, and thereby air or the like from being mixed with the excess fuel. As a result of this, restarting of the engine can be easily achieved.
  • the conjunction cover 7 comprises a cover body 40 to be mounted to the upper case 6, a first fuel passage 41 formed in the cover body 40, and a check valve 42 mounted to the first fuel passage 41. Any means for connecting the conjunction cover 7 and the upper case 6 are available. Furthermore, although the backflow-preventing functional portion 3 corresponds to the check valve 42 in the present embodiment, it is not limited to the check valve 42.
  • the first fuel passage 41 comprises a straight passage 43, a pump passage 44 crossing the straight passage 43 at approximately right angles, a strainer passage 45 approximately parallel with the pump passage 44, and the check valve 42 mounted in the straight passage 43.
  • the straight passage 43 is provided with the check valve.42 at one end portion thereof and is closed at the other end portion thereof.
  • To the pump passage 44 one end portion of the fuel pump 10 is connected via an O-ring 46. That is, the one end portion of the fuel pump 10 is connected to the pump passage 44, and the other end portion thereof is inserted into the protecting tube 38 via the pump inserting hole 36.
  • To the strainer passage 45 one end portion of the strainer 11 is linked via an O-ring 47. That is, the one end portion of the strainer 11 is linked to the strainer passage 45, and the other end portion thereof is held by the strainer mounting portion 23 via an O-ring 30.
  • the check valve 42 prevents the fuel flowing through the straight passage 43 from back-flowing. That is , the check valve 42 allows the fuel guided from a side of the fuel pump 10 to easily pass through the strainer passage 45 via the straight passage 43, and prevents the fuel guided from a side of the strainer 11 from flowing into the pump passage 44 via the straight passage 43.
  • this fuel pump module 1 because being of such an in-tank type as to be mounted in the fuel tank 14, serves as a sub tank 15 for the fuel tank 14.
  • the fuel accommodated in the fuel tank 14 flows into the sub tank 15 from the fuel inlet 25 formed in the peripheral wall 21 of the lower case 5.
  • the fuel reserved in the reservoir 8 of the sub tank 15 is upward pumped by the fuel pump 10 serving as the pumping functional portion 2, and fed to the strainer 11 via the first fuel passage 41.
  • the check valve 42 serving as the backflow preventing functional portion 3 is mounted in the first fuel passage 41, the flowing direction of the fuel in the first fuel passage 41 is restricted by the check valve 42. That is, the check valve 42 allows the flowing direction of the fuel toward the strainer 11 from the fuel pump 10, but restricts the flowing direction of the fuel toward the fuel pump 10 from the strainer 11, namely restricts the backflow to the maximum. Therefore, after stopping of the engine, or at an inclined condition of a vehicle or the like, the check valve 42 prevents backflow into the first fuel passage 41.
  • the fuel having flown into the strainer 11 is delivered to the second fuel passage 26.
  • the fuel present in the second fuel passage 26 is supplied from the discharge port 27 to the engine via the fuel pipe 28, as well as introduced from the second fuel passage 26 to the pressure regulator 12 serving as the pressure-regulating functional portion 4, via the auxiliary passage 29.
  • the pressure regulator 12 Since the pressure regulator 12 is mounted to the auxiliary passage 29, the fuel pressure in the second fuel passage 41 is kept constant. That is, after stopping of the engine of a vehicle or the like, or at an inclined condition of a vehicle or the like, the pressure regulator 12 prevents the fuel pressure in the second fuel passage 41 from lowering. As a result of this, it is possible to activate easily of the engine at restarting of the engine.
  • the fuel pump 10, the strainer 11, and the pressure regulator 12 are located, respectively, and the pressure regulator 12 is linked to the second fuel passage 26.
  • the fuel pump 10 and the strainer 11 are held, and the pressure regulator 12 is fixed.
  • the fuel pump 10 and the strainer 11 are fixed via the first fuel passage 41.
  • the number of parts constituting the fuel pump module 1 increases.
  • the flexibility in design layout is improved due to the increased number of parts. Therefore, employing of the arrangement as described in the present embodiment, for example, can make lower (shorter) a height (distance) between the bottom surface of the lower case 5 and the conjunction cover 7 in the fuel pump module 1. As a result of this, it is possible to achieve miniaturization of the fuel pump module 1 in comparison with the conventional pump modules.
  • the present invention is not limited to the above-described embodiment, and can be modified in various ways without departing from the gist of the invention.
  • the pumping functional portion 2, the backflow-preventing functional portion 3, and the pressure-regulating functional portion 4 can be located in any positions, respectively.
  • the essential concept of the present invention can be applied to, for example, trains, aircrafts, marine vessels or the like besides vehicles or the like.
  • the pumping functional portion is given only the pump function, and the other functional portions are given all the functions other than the pump function. Therefore, if only the pumping functional portion and the other functional portions are integrated into one, an after-integration structure can have the same function as a before-division structure.
  • the fuel pump module is fully divided into single-functional portions such as pumping functional portion, backflow-preventing functional portion, and pressure-regulating functional portion. And, the single-functional portions are again integrated into one after the division. Therefore, it is possible to improve the flexibility of the design layout in designing the fuel pump module in comparison with the conventional pump modules. As a result of this, it is possible to achieve miniaturization of the fuel pump module and reduction of costs associated with the miniaturization.
  • the other functional members can be easily added to the fuel pump module.
  • at least one of the single-functional members can be easily eliminated from the plurality of single-functional members integrated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP01112720A 2000-05-29 2001-05-25 Module de pompe à carburant Expired - Lifetime EP1160446B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000158391A JP4410384B2 (ja) 2000-05-29 2000-05-29 燃料ポンプモジュール
JP2000158391 2000-05-29

Publications (3)

Publication Number Publication Date
EP1160446A2 true EP1160446A2 (fr) 2001-12-05
EP1160446A3 EP1160446A3 (fr) 2002-05-22
EP1160446B1 EP1160446B1 (fr) 2004-04-21

Family

ID=18662867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112720A Expired - Lifetime EP1160446B1 (fr) 2000-05-29 2001-05-25 Module de pompe à carburant

Country Status (3)

Country Link
EP (1) EP1160446B1 (fr)
JP (1) JP4410384B2 (fr)
CN (1) CN1327124A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657099A2 (fr) * 2004-11-16 2006-05-17 Keihin Corporation Groupe d'acheminement de carburant
CN102352839A (zh) * 2011-07-08 2012-02-15 哈尔滨飞机工业集团有限责任公司 集成式液压包

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3783230B2 (ja) * 2002-03-28 2006-06-07 株式会社デンソー ポンプモジュール
GB201119491D0 (en) * 2011-11-11 2011-12-21 Airbus Operations Ltd Clack valve assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4444854A1 (de) * 1994-12-16 1996-06-20 Bosch Gmbh Robert Förderaggregat
EP0856658A2 (fr) * 1997-01-31 1998-08-05 Mitsubishi Denki Kabushiki Kaisha Appareil d'alimentation en carburant pour véhicule
EP0939218A2 (fr) * 1998-02-25 1999-09-01 Mitsubishi Denki Kabushiki Kaisha Dispositif d'alimentation en carburant
EP0959241A1 (fr) * 1997-11-19 1999-11-24 Mitsubishi Denki Kabushiki Kaisha Systeme d'alimentation en carburant pour vehicules

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4444854A1 (de) * 1994-12-16 1996-06-20 Bosch Gmbh Robert Förderaggregat
EP0856658A2 (fr) * 1997-01-31 1998-08-05 Mitsubishi Denki Kabushiki Kaisha Appareil d'alimentation en carburant pour véhicule
EP0959241A1 (fr) * 1997-11-19 1999-11-24 Mitsubishi Denki Kabushiki Kaisha Systeme d'alimentation en carburant pour vehicules
EP0939218A2 (fr) * 1998-02-25 1999-09-01 Mitsubishi Denki Kabushiki Kaisha Dispositif d'alimentation en carburant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657099A2 (fr) * 2004-11-16 2006-05-17 Keihin Corporation Groupe d'acheminement de carburant
EP1657099A3 (fr) * 2004-11-16 2011-07-27 Keihin Corporation Groupe d'acheminement de carburant
CN102352839A (zh) * 2011-07-08 2012-02-15 哈尔滨飞机工业集团有限责任公司 集成式液压包

Also Published As

Publication number Publication date
JP2001336461A (ja) 2001-12-07
CN1327124A (zh) 2001-12-19
EP1160446B1 (fr) 2004-04-21
EP1160446A3 (fr) 2002-05-22
JP4410384B2 (ja) 2010-02-03

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