US20040013537A1 - Fuel supply unit - Google Patents
Fuel supply unit Download PDFInfo
- Publication number
- US20040013537A1 US20040013537A1 US10/363,787 US36378703A US2004013537A1 US 20040013537 A1 US20040013537 A1 US 20040013537A1 US 36378703 A US36378703 A US 36378703A US 2004013537 A1 US2004013537 A1 US 2004013537A1
- Authority
- US
- United States
- Prior art keywords
- fuel
- feed unit
- fuel feed
- region
- line
- 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.)
- Abandoned
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
-
- 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
- F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
-
- 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 invention relates to a fuel feed unit, having a fuel pump, which is provided for the purpose of feeding fuel out of a suction region into a delivery region, and having a bleed valve for sealing the delivery region or connecting the delivery region to the environment.
- Fuel feed units of this type are in widespread use in modern motor vehicles and are known in practice.
- the fuel feed unit generally has a fuel pump, which is arranged in a housing and has an electric motor, and is mounted in a splash pot in a fuel tank of the motor vehicle.
- the fuel pump and the suction region are situated at a lower end of the housing.
- the delivery region with the bleed valve and a connection piece for a flow line leading to an internal combustion engine of the motor vehicle are arranged in the upper region of the housing.
- the fuel which is being fed generally flows through the electric motor.
- a drawback of the known fuel feed unit is that when the splash pot is virtually empty after the fuel pump has been inactive for a prolonged period, air can penetrate into the housing via the bleed valve. Then, when the fuel pump is started up, this air must first of all be displaced back out by the fuel being fed, via the bleed valve. This leads to a time delay when building up pressure and to air and fuel mixing.
- the invention is based on the problem of preventing air from penetrating into the housing of the fuel feed unit.
- This arrangement means that it is impossible for any air to penetrate into the housing of the fuel feed unit according to the invention via the bleed valve. Therefore, the housing is full of fuel even after the fuel pump has been inactive for a prolonged period and does not have to be bled when the fuel pump is started up.
- the air which is present during the initial filling in the housing and gas bubbles which are produced as a result of gases evolved from the fuel can be discharged from the housing via the bleed valve without problems.
- the fuel feed unit according to the invention is of particularly simple design if a line is connected to the environment-side region of the bleed valve, and if the line runs to close to the suction region. Consequently the free end of the line is always situated within the fuel, even when the splash pot is virtually empty.
- the line may, by way of example, have a particularly large cross section and may store air which is to be discharged during the initial filling operation.
- the penetration of air situated in the line into the housing of the fuel feed unit according to the invention can be substantially avoided if the volume of the line is particularly small compared to the volume of the delivery region.
- FIG. 1 The only figure in the drawing shows a base region of a fuel tank of a motor vehicle.
- a splash pot 1 with a fuel feed unit 2 which has a two-stage fuel pump 3 , is fitted in the fuel tank.
- the fuel pump 3 has a preliminary stage 4 for feeding fuel out of the fuel tank into the splash pot 1 , and a principle stage 5 for feeding fuel out of the splash pot 1 into a delivery region 7 arranged in the upper part of a housing 6 of the fuel feed unit 2 .
- the flows of fuel are indicated by arrows in the drawing.
- a connection piece 8 for a flow line which is not shown and leads to an internal combustion engine of the motor vehicle, is arranged on that part of the housing 6 which has the delivery region 7 .
- the housing 6 has a bleed valve 9 .
- the bleed valve 9 connects the delivery region 7 to the environment and allows gas bubbles to escape from the delivery region 7 .
- the bleed valve 9 closes.
- a line 10 which leads to just above the bottom of the splash pot 1 and therefore into a region which is constantly filled with fuel, is connected at the environment-side end of the bleed valve 9 .
Abstract
In a fuel feed unit (2) a bleed valve (9) is connected to a region which is constantly filled with fuel. This means that gases pass out of the fuel feed unit (2) through the bleed valve (9). However, penetration of gases when the fuel feed unit (2) is not operating, via leaks in the bleed valve (9), is reliably avoided.
Description
- Fuel Feed Unit
- The invention relates to a fuel feed unit, having a fuel pump, which is provided for the purpose of feeding fuel out of a suction region into a delivery region, and having a bleed valve for sealing the delivery region or connecting the delivery region to the environment.
- Fuel feed units of this type are in widespread use in modern motor vehicles and are known in practice. The fuel feed unit generally has a fuel pump, which is arranged in a housing and has an electric motor, and is mounted in a splash pot in a fuel tank of the motor vehicle. In the installed state of the fuel feed unit, the fuel pump and the suction region are situated at a lower end of the housing. The delivery region with the bleed valve and a connection piece for a flow line leading to an internal combustion engine of the motor vehicle are arranged in the upper region of the housing. The fuel which is being fed generally flows through the electric motor.
- A drawback of the known fuel feed unit is that when the splash pot is virtually empty after the fuel pump has been inactive for a prolonged period, air can penetrate into the housing via the bleed valve. Then, when the fuel pump is started up, this air must first of all be displaced back out by the fuel being fed, via the bleed valve. This leads to a time delay when building up pressure and to air and fuel mixing.
- The invention is based on the problem of preventing air from penetrating into the housing of the fuel feed unit.
- According to the invention, this problem is avoided by the fact that that end of the bleed valve which faces the environment is connected to a region which is constantly filled with fuel in the installed state of the fuel feed unit.
- This arrangement means that it is impossible for any air to penetrate into the housing of the fuel feed unit according to the invention via the bleed valve. Therefore, the housing is full of fuel even after the fuel pump has been inactive for a prolonged period and does not have to be bled when the fuel pump is started up. The air which is present during the initial filling in the housing and gas bubbles which are produced as a result of gases evolved from the fuel can be discharged from the housing via the bleed valve without problems.
- The fuel feed unit according to the invention is of particularly simple design if a line is connected to the environment-side region of the bleed valve, and if the line runs to close to the suction region. Consequently the free end of the line is always situated within the fuel, even when the splash pot is virtually empty.
- The line may, by way of example, have a particularly large cross section and may store air which is to be discharged during the initial filling operation. However, the penetration of air situated in the line into the housing of the fuel feed unit according to the invention can be substantially avoided if the volume of the line is particularly small compared to the volume of the delivery region.
- According to another advantageous refinement of the invention, a contribution is made to further reducing the storage volume of the line if the line has an angled portion leading to the suction region close to the bleed valve. This design makes the length of the line particularly short.
- It is easy to prevent any obstacle to air escaping from the housing of the fuel feed unit according to the invention via the bleed valve if the free end of the line, when the fuel feed unit is mounted in a splash pot, is at a predetermined distance from the bottom of the splash pot.
- The invention permits numerous embodiments. To further clarify its basic principle, one of these embodiments is illustrated in the drawing and is described below.
- The only figure in the drawing shows a base region of a fuel tank of a motor vehicle. A
splash pot 1 with afuel feed unit 2, which has a two-stage fuel pump 3, is fitted in the fuel tank. Thefuel pump 3 has apreliminary stage 4 for feeding fuel out of the fuel tank into thesplash pot 1, and aprinciple stage 5 for feeding fuel out of thesplash pot 1 into a delivery region 7 arranged in the upper part of a housing 6 of thefuel feed unit 2. For clarification, the flows of fuel are indicated by arrows in the drawing. Aconnection piece 8 for a flow line, which is not shown and leads to an internal combustion engine of the motor vehicle, is arranged on that part of the housing 6 which has the delivery region 7. Furthermore, the housing 6 has a bleedvalve 9. The bleedvalve 9 connects the delivery region 7 to the environment and allows gas bubbles to escape from the delivery region 7. When the delivery region 7 has been completely filled with fuel, the bleedvalve 9 closes. Aline 10, which leads to just above the bottom of thesplash pot 1 and therefore into a region which is constantly filled with fuel, is connected at the environment-side end of the bleedvalve 9. - When the delivery region7 is vented, gases pass out of the delivery region 7 through the
bleed valve 9 and theline 10. When the motor vehicle and therefore thefuel feed unit 2 are stationary, the fact that theline 10 runs as far as into the region which contains fuel prevents air from being able to enter the delivery region 7 as a result of leaks at thebleed valve 9. Consequently, pressure is built up particularly quickly when thefuel feed unit 2 is started up again.
Claims (5)
1. Fuel feed unit, having a fuel pump, which is provided for the purpose of feeding fuel out of a suction region into a delivery region, and having a bleed valve for sealing the delivery region or connecting the delivery region to the environment, characterized in that that end of the bleed valve (9) which faces the environment is connected to a region which is constantly filled with fuel in the assembled state of the fuel feed unit (2).
2. Fuel feed unit according to claim 1 , characterized in that a line (10) is connected to that end of the bleed valve (9) which faces toward the environment, and in that the line (10) leads to close to the suction region.
3. Fuel feed unit according to claim 1 or 2, characterized in that the volume of the line (10) is particularly small compared to the volume of the delivery region (7).
4. Fuel feed unit according to at least one of the preceding claims, characterized in that the line (10) is bent in a U shape.
5. Fuel feed unit according to at least one of the preceding claims, characterized in that the free end of the line (10), when the fuel feed unit (2) has been mounted in a splash pot (1), is at a predetermined distance from the bottom of the splash pot (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044609.4 | 2000-09-09 | ||
DE10044609A DE10044609B4 (en) | 2000-09-09 | 2000-09-09 | Fuel delivery unit |
PCT/DE2001/003132 WO2002020973A1 (en) | 2000-09-09 | 2001-08-16 | Fuel supply unit |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040013537A1 true US20040013537A1 (en) | 2004-01-22 |
Family
ID=7655618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/363,787 Abandoned US20040013537A1 (en) | 2000-09-09 | 2001-08-16 | Fuel supply unit |
Country Status (11)
Country | Link |
---|---|
US (1) | US20040013537A1 (en) |
EP (1) | EP1315898B1 (en) |
JP (1) | JP2004508491A (en) |
KR (1) | KR100768599B1 (en) |
CN (1) | CN100385105C (en) |
AT (1) | ATE268866T1 (en) |
AU (1) | AU2001283801A1 (en) |
BR (1) | BR0113733A (en) |
DE (2) | DE10044609B4 (en) |
ES (1) | ES2223000T3 (en) |
WO (1) | WO2002020973A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060093772A1 (en) * | 2004-10-27 | 2006-05-04 | Fish Robert B Jr | Multilayered pipes comprising hydrolysis resistant polyamides |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101271377B1 (en) | 2007-08-10 | 2013-06-07 | 현대자동차주식회사 | Fuel Pump for LPI Vehicle |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3127748A (en) * | 1960-05-10 | 1964-04-07 | Gullick Ltd | Mine roof supports |
US3495544A (en) * | 1967-08-30 | 1970-02-17 | Binks Res & Dev | Hydraulic system |
US3819303A (en) * | 1973-06-13 | 1974-06-25 | Ecodyne Corp | Relief-release pumps |
US4776771A (en) * | 1986-09-19 | 1988-10-11 | Grunbeck Wasseraufbereitung Gmbh | Metering pump |
US4844704A (en) * | 1986-04-03 | 1989-07-04 | Honda Giken Kogyo Kabushiki Kaisha | Fuel pump assembly |
US4990066A (en) * | 1988-08-12 | 1991-02-05 | Hans Kern | Metering pump |
US6082321A (en) * | 1998-07-29 | 2000-07-04 | Borgwarner Inc. | Method for controlling output pressure of an engine oil pump |
US6158975A (en) * | 1998-09-24 | 2000-12-12 | Walbro Corporation | Fuel pump module |
US6168390B1 (en) * | 1997-03-22 | 2001-01-02 | Henkel Kommanditgesellschaft Auf Aktien | Dosing pump for dosed liquid conveyance |
US6203286B1 (en) * | 1999-01-14 | 2001-03-20 | Pierburg Ag | Electric fuel pump which is self-filling at low fuel levels in a fuel tank |
US6283731B1 (en) * | 1998-07-02 | 2001-09-04 | Mitsubishi Denki Kabushiki Kaisha | Vehicle fuel supplying apparatus |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5943148A (en) * | 1982-08-27 | 1984-03-10 | 株式会社豊田自動織機製作所 | Wefting apparatus in fluid jet type loom |
DE3540260C2 (en) * | 1985-11-13 | 1995-01-05 | Bosch Gmbh Robert | Unit for delivering fuel from a storage tank to an internal combustion engine |
JPH0341085Y2 (en) * | 1987-03-17 | 1991-08-29 | ||
JPH0755326Y2 (en) * | 1989-11-18 | 1995-12-20 | 堀江金属工業株式会社 | Fuel pump unit |
JPH0732935Y2 (en) * | 1990-04-25 | 1995-07-31 | 株式会社ユニシアジェックス | Fuel pump |
DE4038875A1 (en) * | 1990-08-30 | 1992-03-12 | Vdo Schindling | Fuel pump with valve for motor vehicle IC engine - incorporates vent for airexpulsion from engine space into which fuel enters at commencement ofstroke |
JPH07259675A (en) * | 1994-03-22 | 1995-10-09 | Nissan Motor Co Ltd | Turning tank vessel structure for fuel tank |
DE19618452B4 (en) * | 1996-05-08 | 2005-05-12 | Robert Bosch Gmbh | Aggregate for conveying fuel from a storage tank to an internal combustion engine |
DE19834653C1 (en) * | 1998-07-31 | 1999-12-16 | Bosch Gmbh Robert | Modular fuel supply system for IC engines in motor vehicles |
-
2000
- 2000-09-09 DE DE10044609A patent/DE10044609B4/en not_active Revoked
-
2001
- 2001-08-16 DE DE50102542T patent/DE50102542D1/en not_active Revoked
- 2001-08-16 US US10/363,787 patent/US20040013537A1/en not_active Abandoned
- 2001-08-16 KR KR1020037002674A patent/KR100768599B1/en not_active IP Right Cessation
- 2001-08-16 BR BR0113733-6A patent/BR0113733A/en not_active Application Discontinuation
- 2001-08-16 EP EP01962643A patent/EP1315898B1/en not_active Revoked
- 2001-08-16 ES ES01962643T patent/ES2223000T3/en not_active Expired - Lifetime
- 2001-08-16 AT AT01962643T patent/ATE268866T1/en not_active IP Right Cessation
- 2001-08-16 CN CNB018152872A patent/CN100385105C/en not_active Expired - Fee Related
- 2001-08-16 WO PCT/DE2001/003132 patent/WO2002020973A1/en active IP Right Grant
- 2001-08-16 JP JP2002525360A patent/JP2004508491A/en active Pending
- 2001-08-16 AU AU2001283801A patent/AU2001283801A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3127748A (en) * | 1960-05-10 | 1964-04-07 | Gullick Ltd | Mine roof supports |
US3495544A (en) * | 1967-08-30 | 1970-02-17 | Binks Res & Dev | Hydraulic system |
US3819303A (en) * | 1973-06-13 | 1974-06-25 | Ecodyne Corp | Relief-release pumps |
US4844704A (en) * | 1986-04-03 | 1989-07-04 | Honda Giken Kogyo Kabushiki Kaisha | Fuel pump assembly |
US4776771A (en) * | 1986-09-19 | 1988-10-11 | Grunbeck Wasseraufbereitung Gmbh | Metering pump |
US4990066A (en) * | 1988-08-12 | 1991-02-05 | Hans Kern | Metering pump |
US6168390B1 (en) * | 1997-03-22 | 2001-01-02 | Henkel Kommanditgesellschaft Auf Aktien | Dosing pump for dosed liquid conveyance |
US6283731B1 (en) * | 1998-07-02 | 2001-09-04 | Mitsubishi Denki Kabushiki Kaisha | Vehicle fuel supplying apparatus |
US6082321A (en) * | 1998-07-29 | 2000-07-04 | Borgwarner Inc. | Method for controlling output pressure of an engine oil pump |
US6158975A (en) * | 1998-09-24 | 2000-12-12 | Walbro Corporation | Fuel pump module |
US6203286B1 (en) * | 1999-01-14 | 2001-03-20 | Pierburg Ag | Electric fuel pump which is self-filling at low fuel levels in a fuel tank |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060093772A1 (en) * | 2004-10-27 | 2006-05-04 | Fish Robert B Jr | Multilayered pipes comprising hydrolysis resistant polyamides |
Also Published As
Publication number | Publication date |
---|---|
EP1315898A1 (en) | 2003-06-04 |
DE10044609B4 (en) | 2004-11-04 |
DE10044609A1 (en) | 2002-06-27 |
AU2001283801A1 (en) | 2002-03-22 |
BR0113733A (en) | 2003-07-29 |
DE50102542D1 (en) | 2004-07-15 |
CN1623035A (en) | 2005-06-01 |
CN100385105C (en) | 2008-04-30 |
ATE268866T1 (en) | 2004-06-15 |
JP2004508491A (en) | 2004-03-18 |
WO2002020973A1 (en) | 2002-03-14 |
KR20030036726A (en) | 2003-05-09 |
KR100768599B1 (en) | 2007-10-18 |
ES2223000T3 (en) | 2005-02-16 |
EP1315898B1 (en) | 2004-06-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |