EP1336751A1 - In-tank solenoid fuel pump - Google Patents
In-tank solenoid fuel pump Download PDFInfo
- Publication number
- EP1336751A1 EP1336751A1 EP02798805A EP02798805A EP1336751A1 EP 1336751 A1 EP1336751 A1 EP 1336751A1 EP 02798805 A EP02798805 A EP 02798805A EP 02798805 A EP02798805 A EP 02798805A EP 1336751 A1 EP1336751 A1 EP 1336751A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- cylinder
- fuel pump
- plunger
- circulation passage
- 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
Links
Images
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
- F02M37/20—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
Definitions
- the present invention relates to an electromagnetic fuel pump which draws in and pressurizes fuel stored inside a fuel tank and supplies this fuel to an internal combustion engine, and more particularly relates to an in-tank type electromagnetic fuel pump which is disposed inside the fuel tank in a state in which this fuel pump is submerged in the fuel inside this fuel tank.
- fuel F stored in a fuel tank 1 is drawn in and pressurized by a fuel pump 2 so that this fuel F is supplied to the intake passage 3 of an internal combustion engine via (for example) a fuel injection device 4.
- a so-called in-tank type electromagnetic fuel pump which is disposed in a state in which this fuel pump is submerged in the fuel F inside the fuel tank is known as the fuel pump 2.
- this electromagnetic fuel pump 2 comprises a cylinder 6 that forms a pressurizing chamber 5, a plunger 7 which is slidably mounted inside this cylinder 6, an inner yoke 8 which is disposed so as to surround the plunger 7, a pair of springs 9 and 10 which are interposed between both end parts of the plunger 7 and both end parts of the inner yoke 8, and which hold the plunger 7 in a neutral position, a bobbin 12 which is disposed so as to surround the inner yoke 8, and around which is wound a solenoid coil 11 that moves the plunger 7 in the intake direction by exciting this plunger 7, and a molding 13 in which these constituent members are accommodated.
- an outlet check valve 14 which is pushed open by the pressurized fuel F is installed on one end part of the cylinder 6, on the side on which the pressurizing chamber 5 is formed, and a fuel introduction hole 16 is formed in the interior part of the plunger 7 such that the fuel introduction hole 16 communicates with a fuel inlet passage 15 formed in the opposite side of the plunger 7 from the pressurizing chamber 15, and also communicates with the pressurizing chamber 15.
- An inlet check valve 17 is disposed at an intermediate point in the fuel introduction hole 16, so that this inlet check valve 17 is opened when the plunger is moved in the intake direction so that the pressure in the pressurizing chamber 5 is reduced, thus allowing the flow of fuel F from the d fuel introduction hole 16 into the pressurizing chamber 5, and is closed when the plunger 7 is moved in the pressurizing direction.
- the plunger 7 is moved in the pressurizing direction by the spring 9, whereby, the fuel F inside the pressurizing chamber 5 is pressurized, and at the point in time at which the pressure of this fuel F exceeds a specified value, the outlet check valve 14 is opened, and the fuel F is discharged.
- Fuel F is successively discharged by the repetition of the above operation.
- the fuel F inside the fuel inlet passage 15 and fuel introduction hole 16 is heated by this heat via the inner yoke 8 and cylinder 6, so that vapor is generated in this fuel F.
- the present invention was devised in the light of such conventional problems. It is an object of the present invention to provide an in-tank type electromagnetic fuel pump which makes it possible to prevent vapor in the fuel from entering the pressurizing chamber even if such vapor is generated as a result of the generation of heat in the solenoid coil itself or during the sliding movement of the plunger.
- the in-tank type electromagnetic fuel pump according to claim 1 of the present application is an in-tank type electromagnetic fuel pump which is disposed inside a fuel tank, and comprises a cylinder that forms a pressurizing chamber, a plunger which is slidably mounted inside this cylinder, an inner yoke which is attached to the outer circumference of the cylinder, and a bobbin which is disposed so that it surrounds the inner yoke, and around which a solenoid coil that excites the plunger is wound.
- a fuel circulation passage is formed on the outside of the cylinder along the longitudinal direction of this cylinder, and both end portions of this fuel circulation passage open into the interior of the fuel tank in the vicinity of both end portions of the cylinder in the longitudinal direction of the cylinder.
- the in-tank type electromagnetic fuel pump according to claim 2 of the present application is characterized in that the fuel circulation passage described in claim 1 is formed by a groove that is formed in the inside surface of the bobbin along the longitudinal direction of this bobbin.
- the in-tank type electromagnetic fuel pump according to claim 3 of the present application is characterized in that a plurality of the grooves described in claim 2 are formed at specified intervals around the axial line of the bobbin.
- the in-tank type electromagnetic fuel pump according to claim 4 of the present application is characterized in that a collar is disposed between the bobbin and the inner yoke described in claim 1, and the fuel circulation passage is formed in this collar.
- the in-tank type electromagnetic fuel pump according to claim 5 of the present application is characterized in that the inner yoke described in any of claims 1 through 4 is divided into two parts in the longitudinal direction of the cylinder, and [these parts] are disposed at a specified spacing in the longitudinal direction of the cylinder, so that a portion of the cylinder is exposed to the fuel circulation passage.
- the in-tank electromagnetic fuel pump of the present embodiment which is indicated by the symbol 20 in Fig. 1, is an in-tank electromagnetic fuel pump which is disposed inside a fuel tank 1.
- This electromagnetic fuel pump has an overall construction which comprises a cylinder 6 that forms a pressurizing chamber 5, a plunger 7 which is slidably mounted inside this cylinder 6, an inner yoke 8 which is attached to the outer circumference of the cylinder 6, and a bobbin 21 which is disposed so as to surround the inner yoke 8, and around which a solenoid coil 11 that excites the plunger 7 is wound, and in which a fuel circulation passage 22 is formed on the outside of the cylinder 6 along the longitudinal direction of this cylinder 6, and both end parts of this fuel circulation passage 22 open into the interior of the fuel tank 1 in the vicinity of both end parts in the longitudinal direction of the cylinder 6.
- the inner yoke 8 is divided into two parts in the longitudinal direction of the cylinder 6, and these parts are attached with a specified spacing in the longitudinal direction of the cylinder 6, so that a portion of the cylinder 6 is exposed to the fuel circulation passage 22 between these two parts of the inner yoke 8.
- the fuel circulation passage 22 is formed by grooves 23 that are formed in the inside surface of the bobbin 21 along the entire length of this bobbin 21. As is shown in Fig. 2, these grooves 23 are formed in four places at specified intervals in the circumferential direction of the cylinder 6.
- both end parts of these grooves 23 are caused to communicate with the outside of the in-tank electromagnetic fuel pump 20, that is, with the interior of the fuel tank 1, via opening parts 13a and 13b that are formed in both end parts of the molding 13.
- the plunger 7 is caused to perform a reciprocating motion through the cylinder 6 by the repeated excitation and de-excitation of this plunger 7 by the solenoid coil 11.
- fuel F is sucked into the pressurizing chamber 5 from the fuel inlet passage 15 and fuel introduction hole 16 via the inlet check valve 17.
- this fuel F is supplied to the fuel injection device 4 via the outlet check valve 14.
- low-temperature fuel F inside the fuel tank 1 is supplied to the interior of the fuel circulation passage 22.
- heated fuel F is removed from the surface of the inner yoke 8, and low-temperature fuel F is caused to contact this surface, so that the rise in the temperature of the inner yoke 8, and therefore the rise in the temperature of the cylinder 6 that is contacted by this inner yoke 8, is inhibited (specifically, the inner yoke 8 and cylinder 6 are cooled); furthermore, the heating of the fuel F inside the fuel inlet passage 15 and fuel introduction passage 16 is inhibited.
- the cooling action of the fuel F inside the fuel circulation passage 22 on the cylinder 6 is efficiently accomplished; as a result, the effect that prevents the generation of vapor in the fuel F inside the fuel inlet passage 15 and fuel introduction passage 16 is greatly heightened.
- the movement of the fuel F inside the fuel circulation passage 22 is accomplished forcibly and securely, so that the cooling action on the inner yoke 8 and cylinder 6 is enhanced.
- the vapor generated inside the fuel circulation passage 22 is caused to move to the top of the fuel tank 1 by buoyancy at the point of time when this vapor is discharged to the outside of the molding 13, and the vapor is released into the upper space of the fuel tank 1.
- the heat generated from the solenoid coil 11 and heat generated by the sliding movement of the plunger 7 during the discharge operation is efficiently removed, so that vapor can be prevented from entering in the fuel F that is sucked into the pressurizing chamber 5.
- the heat generated from the solenoid coil and heat generated by the sliding movement of the plunger during the discharge operation can be efficiently removed, so that vapor can be prevented from entering in the fuel that is sucked into the pressurizing chamber.
Abstract
Description
Claims (5)
- An in-tank type electromagnetic fuel pump disposed inside a fuel tank, comprising:a cylinder that forms a pressurizing chamber;a plunger which is slidably mounted inside this cylinder;an inner yoke which is attached to the outer circumference of said cylinder; anda bobbin which is disposed so as to surround said inner yoke, and around which a solenoid coil that excites said plunger is wound;
- The in-tank type electromagnetic fuel pump according to claim 1, wherein said fuel circulation passage is formed by a groove that is formed in the inside surface of said bobbin along the longitudinal direction of said bobbin.
- The in-tank type electromagnetic fuel pump according to claim 2, wherein a plurality of said grooves are formed at specified intervals around the axial line of said bobbin.
- The in-tank type electromagnetic fuel pump according to claim 1, wherein a collar is disposed between said bobbin and said inner yoke, and said fuel circulation passage is formed in this collar.
- The in-tank type electromagnetic fuel pump according to any of claims 1 through 4, wherein said inner yoke is divided into two parts in the longitudinal direction of said cylinder, and these parts are disposed at a specified spacing in the longitudinal direction of said cylinder, so that a portion of said cylinder is exposed to said fuel circulation passage.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001276258A JP2003083194A (en) | 2001-09-12 | 2001-09-12 | In-tank-type electromagnetic fuel pump |
JP2001276258 | 2001-09-12 | ||
PCT/JP2002/008892 WO2003025383A1 (en) | 2001-09-12 | 2002-09-02 | In-tank solenoid fuel pump |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1336751A1 true EP1336751A1 (en) | 2003-08-20 |
EP1336751A4 EP1336751A4 (en) | 2005-05-11 |
EP1336751B1 EP1336751B1 (en) | 2006-05-24 |
Family
ID=19100988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02798805A Expired - Fee Related EP1336751B1 (en) | 2001-09-12 | 2002-09-02 | In-tank solenoid fuel pump |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1336751B1 (en) |
JP (1) | JP2003083194A (en) |
CN (1) | CN1498307A (en) |
DE (1) | DE60211643D1 (en) |
TW (1) | TW587124B (en) |
WO (1) | WO2003025383A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006060942A1 (en) * | 2004-12-08 | 2006-06-15 | Fai Electronic Co., Ltd. | Integrated fuel supply module |
WO2010135161A1 (en) * | 2009-05-19 | 2010-11-25 | Sturman Digital Systems, Llc | Fuel systems and methods for cold environments |
US10619628B2 (en) | 2014-12-04 | 2020-04-14 | Robert Bosch Gmbh | Fuel pump with improved delivery properties |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102155379B (en) * | 2011-03-23 | 2012-09-05 | 哈尔滨工业大学 | Magnetic fluid traveling wave pump with solenoid coil |
CN102889157B (en) * | 2012-10-12 | 2014-06-25 | 众恒汽车部件有限公司 | External fuel pump for motorcycles |
CN103397993B (en) * | 2013-08-08 | 2016-02-10 | 中联重科股份有限公司 | A kind of cam pump |
DE102014208614A1 (en) * | 2014-05-08 | 2015-11-12 | Robert Bosch Gmbh | Fuel pump |
DE102014208646A1 (en) * | 2014-05-08 | 2015-11-12 | Robert Bosch Gmbh | Fuel pump assembly and method of operating the like |
DE102015118529A1 (en) * | 2015-10-29 | 2017-05-04 | Sysko Ag | drinks pump |
DE102015222106A1 (en) * | 2015-11-10 | 2017-05-11 | Robert Bosch Gmbh | Fuel pump with exhaust valve in the piston and a fuel path flushing around the actuator |
CN113464397A (en) * | 2020-03-30 | 2021-10-01 | 福爱电子(贵州)有限公司 | Double-pulse pump liquid injection device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4150924A (en) * | 1977-06-10 | 1979-04-24 | Taisan Industrial Co., Ltd. | Electromagnetic plunger pump |
US4376618A (en) * | 1980-12-06 | 1983-03-15 | Taisan Industrial Co., Ltd. | Electromagnetic plunger pump |
EP0822330A2 (en) * | 1996-07-09 | 1998-02-04 | Pierburg Aktiengesellschaft | Fuel supply system for internal combustion engines |
EP1340906A1 (en) * | 2000-11-17 | 2003-09-03 | Mikuni Corporation | Electronic control fuel injection device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0618055Y2 (en) * | 1988-05-19 | 1994-05-11 | 株式会社ユニシアジェックス | In-tank fuel pump device |
JPH0427157U (en) * | 1990-06-29 | 1992-03-04 | ||
JP2002195122A (en) * | 2000-12-27 | 2002-07-10 | Mikuni Corp | Fuel supply system |
-
2001
- 2001-09-12 JP JP2001276258A patent/JP2003083194A/en active Pending
-
2002
- 2002-09-02 CN CNA028028376A patent/CN1498307A/en active Pending
- 2002-09-02 EP EP02798805A patent/EP1336751B1/en not_active Expired - Fee Related
- 2002-09-02 DE DE60211643T patent/DE60211643D1/en not_active Expired - Lifetime
- 2002-09-02 WO PCT/JP2002/008892 patent/WO2003025383A1/en active IP Right Grant
- 2002-09-12 TW TW91120887A patent/TW587124B/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4150924A (en) * | 1977-06-10 | 1979-04-24 | Taisan Industrial Co., Ltd. | Electromagnetic plunger pump |
US4376618A (en) * | 1980-12-06 | 1983-03-15 | Taisan Industrial Co., Ltd. | Electromagnetic plunger pump |
EP0822330A2 (en) * | 1996-07-09 | 1998-02-04 | Pierburg Aktiengesellschaft | Fuel supply system for internal combustion engines |
EP1340906A1 (en) * | 2000-11-17 | 2003-09-03 | Mikuni Corporation | Electronic control fuel injection device |
Non-Patent Citations (1)
Title |
---|
See also references of WO03025383A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006060942A1 (en) * | 2004-12-08 | 2006-06-15 | Fai Electronic Co., Ltd. | Integrated fuel supply module |
US7377266B2 (en) | 2004-12-08 | 2008-05-27 | Daguang Xi | Integrated fuel feed apparatus |
WO2010135161A1 (en) * | 2009-05-19 | 2010-11-25 | Sturman Digital Systems, Llc | Fuel systems and methods for cold environments |
US8694230B2 (en) | 2009-05-19 | 2014-04-08 | Sturman Digital Systems, Llc | Fuel systems and methods for cold environments |
US10619628B2 (en) | 2014-12-04 | 2020-04-14 | Robert Bosch Gmbh | Fuel pump with improved delivery properties |
Also Published As
Publication number | Publication date |
---|---|
WO2003025383A1 (en) | 2003-03-27 |
DE60211643D1 (en) | 2006-06-29 |
EP1336751B1 (en) | 2006-05-24 |
JP2003083194A (en) | 2003-03-19 |
TW587124B (en) | 2004-05-11 |
EP1336751A4 (en) | 2005-05-11 |
CN1498307A (en) | 2004-05-19 |
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