EP1481156A1 - Kraftstoff-fördereinheit - Google Patents
Kraftstoff-fördereinheitInfo
- Publication number
- EP1481156A1 EP1481156A1 EP03708040A EP03708040A EP1481156A1 EP 1481156 A1 EP1481156 A1 EP 1481156A1 EP 03708040 A EP03708040 A EP 03708040A EP 03708040 A EP03708040 A EP 03708040A EP 1481156 A1 EP1481156 A1 EP 1481156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- level sensor
- delivery unit
- fuel delivery
- unit according
- 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
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
- F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
Definitions
- the invention relates to a fuel delivery unit, which is provided for arrangement in a fuel tank of a motor vehicle, with a baffle for collecting fuel and with a feed pump for delivering fuel from the baffle to an internal combustion engine of the motor vehicle.
- the surge pot is usually arranged at a point in the fuel tank where it is preferably filled when it is filled for the first time. This means that the surge pot is also filled when the fuel tank has been emptied and a small amount of, for example, 5 liters of reserve fuel is refilled.
- a disadvantage of the known fuel delivery units is that when the swirl pot is almost empty, air is drawn in by the delivery pump and can accumulate in the lines leading to the internal combustion engine. When the reserve fuel is refilled, the air in the lines prevents fuel from being delivered to the internal combustion engine. Furthermore, running the feed pump dry can damage it.
- the invention is based on the problem of designing a fuel delivery unit of the type mentioned at the outset in such a way that it reliably prevents air from penetrating into the lines leading to the internal combustion engine.
- the swirl pot has a fill level sensor for detecting the therein Contained fuel level and that the level sensor is designed to control the feed pump.
- the feed pump can be controlled depending on the filling of the swirl pot. This makes it possible to switch off the feed pump when the fuel level in the baffle drops below an intended limit. This ensures that the suction area of the feed pump is always below the fuel level. Therefore, even when the baffle is almost empty, air is reliably prevented from being sucked in by the feed pump and blocking the lines leading to the internal combustion engine. Damage to the feed pump from running dry is also reliably prevented.
- the fill level sensor can be manufactured particularly inexpensively if it has a reed switch. Furthermore, such a reed switch delivers a clear switching signal, which can be reliably assigned to a certain level of fuel.
- the fill level sensor has a particularly high stability if it has a tube which extends over a partial region of the height of the baffle.
- the fuel delivery unit according to the invention can be installed particularly easily if the tube of the fill level sensor is fastened to a cover of the swirl pot and protrudes into the swirl pot.
- jamming of the fill level sensor can be reliably prevented if a float of the fill level sensor is guided on the pipe. This also ensures that the reserve pump is refilled after the feed pump is switched off. fuel is detected and the feed pump can be started again.
- the fill level sensor is particularly compact and has a particularly simple structure if a magnetic switch of the fill level sensor and the float are arranged in the tube.
- Sloshing movements of the fuel can act briefly on the fill level sensor and signal incorrectly that the minimum amount of fuel in the surge pot has fallen below.
- the influence of the sloshing movements of the fuel can be kept particularly low if the tube of the fill level sensor has a throttle opening.
- the throttle opening throttles the flow of air or fuel and thereby dampens the movements of the fuel in the pipe.
- Magnetic fields from an electric motor driving the feed pump can result in faulty signals from the level sensor.
- the influence of the magnetic fields of the electric motor on the fill level sensor can be kept particularly low if the fill level sensor is spaced from the feed pump.
- the pipe is preferably arranged spatially separated from the feed pump.
- the control of the feed pump driven by the electric motor requires no additional components apart from the fill level sensor if the fill level sensor has a switch and is directly connected to the feed pump.
- the fuel delivery unit can be equipped with control electronics for detecting signals from the fill level sensor and for Operate the feed pump at least with an emergency program. With such control electronics, fluctuations in the fuel level in the surge pot can also be detected.
- the level sensor therefore does not require any mechanical damping elements or throttle openings.
- FIG. 1 shows a partial section through a fuel delivery unit according to the invention, mounted in a fuel tank,
- FIG. 2 shows a sectional view through the fuel delivery unit according to the invention from FIG. 1 along the line II-II.
- FIG. 1 shows a fuel tank 1 of a motor vehicle with a fuel delivery unit 2 arranged therein for delivering fuel.
- the fuel delivery unit 2 has an electromotive driven delivery pump 4 arranged in a swirl pot 3.
- the delivery pump 4 delivers fuel via a filter 5 arranged in the swirl pot 3 to a connection stub 7 arranged on a mounting flange 6 of the fuel tank 1 a flow line (not shown) leading to an internal combustion engine of the motor vehicle is connected.
- the pressure delivered by the feed pump 4 is limited by a pressure regulator 8.
- the feed pump 4 is supplied with electrical current by control electronics 9 via electrical lines 10.
- the surge pot 3 is locked with a cover 11.
- the cover 11 enables an air exchange of the swirl pot 3 with the other areas of the fuel tank 1 and fuel penetration into the swirl pot 3 from above.
- the swirl pot 3 also has a bottom valve 12, via which fuel can penetrate into the baffle 3, but cannot escape.
- the surge pot 3 can of course also be filled with fuel via a suction jet pump, not shown
- a fill level sensor 13 is arranged in the surge pot 3 at a distance from the feed pump 4.
- the fill level sensor 13 is also connected to the control electronics 9 via electrical lines 14 and has a tube 15 fastened to the cover 11 of the swirl pot 3.
- a reed switch 16, which faces a float 17, is arranged within the tube 15.
- the float 17 carries a magnet 18 and moves slightly with the fuel level in the swirl pot 3.
- the pipe 15 has openings 19, 20. These openings 19, 20 can be designed as throttle openings in order to dampen sloshing movements of the fuel onto the float 17. If the fuel level in the swirl pot 3 is sufficient, the float 17 is pressed upwards with the magnet 18 against the reed switch 16.
- the fill level sensor 13 then delivers a signal to the control electronics 9, which enables the feed pump 4 to be energized. If the level of fuel in the surge pot 3 falls below the minimum value, the magnet 18 moves away from the reed switch 16, whereupon the latter supplies a signal to the control electronics 9. The control electronics 9 then prevent the feed pump 4 from being energized.
- FIG. 2 shows in a sectional view through the surge pot 3 with the fuel delivery unit 2 from FIG. 1 along the line II-II that the pipe 15 of the fill level sensor 13 is at a distance from the delivery pump 4. This prevents the reed switch 16 from being influenced by electromagnetic fields of the electric drive of the feed pump 4.
- FIG. 2 further shows that the surge pot 3 has connection elements 21 for a holder (not shown). has. Such holders are fastened to the mounting flange 6 shown in FIG. 1 and pretension the swirl pot 3 against the bottom of the fuel tank 1.
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10208824 | 2002-03-01 | ||
DE10208824A DE10208824A1 (de) | 2002-03-01 | 2002-03-01 | Kraftstoff-Fördereinheit |
PCT/DE2003/000509 WO2003074863A1 (de) | 2002-03-01 | 2003-02-18 | Kraftstoff-fördereinheit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1481156A1 true EP1481156A1 (de) | 2004-12-01 |
EP1481156B1 EP1481156B1 (de) | 2005-07-13 |
Family
ID=27740522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03708040A Expired - Lifetime EP1481156B1 (de) | 2002-03-01 | 2003-02-18 | Kraftstoff-fördereinheit |
Country Status (6)
Country | Link |
---|---|
US (1) | US7036488B2 (de) |
EP (1) | EP1481156B1 (de) |
AT (1) | ATE299554T1 (de) |
DE (2) | DE10208824A1 (de) |
ES (1) | ES2244923T3 (de) |
WO (1) | WO2003074863A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7261323B2 (en) | 2005-03-31 | 2007-08-28 | Nissan Technical Center North America, Inc. | Fuel damper |
US7377162B2 (en) * | 2005-06-28 | 2008-05-27 | Keurig, Incorporated | Method and apparatus for liquid level sensing |
CN103328807B (zh) | 2011-01-20 | 2017-02-15 | 卡特燃料系统有限公司 | 独立于单元之外的用于船用燃料蒸汽分离器的燃料液位传感器 |
DE102020120492A1 (de) | 2020-08-04 | 2022-02-10 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Steuern einer Betriebsmittelpumpe, Betriebsmittelbehälter und Kraftfahrzeug |
DE102022100839A1 (de) | 2022-01-14 | 2023-07-20 | Bayerische Motoren Werke Aktiengesellschaft | Betriebsmittelbehälter und Kraftfahrzeug |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4253332A (en) * | 1979-08-30 | 1981-03-03 | Flowtron Industries, Inc. | Sealed flow meter for in-tank installation |
US4441860A (en) * | 1982-03-01 | 1984-04-10 | Haruo Tsujimoto | Water level detector apparatus of float type |
JP2602709B2 (ja) | 1988-12-12 | 1997-04-23 | 本田技研工業株式会社 | 車両用燃料供給装置 |
US4974570A (en) | 1989-05-05 | 1990-12-04 | Carter Automotive Company, Inc. | Fuel supply module |
US5080077A (en) * | 1990-06-01 | 1992-01-14 | General Motors Corporation | Modular fuel delivery system |
DE4435508A1 (de) * | 1994-10-04 | 1996-04-11 | Bosch Gmbh Robert | Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeugs |
DE19531424A1 (de) * | 1995-08-26 | 1997-02-27 | Bosch Gmbh Robert | Kraftstoffördereinrichtung |
DE19547097A1 (de) * | 1995-12-16 | 1997-06-19 | Audi Ag | Vorrichtung zur Versorgung einer Brennkraftmaschine mit Kraftstoff |
US5979485A (en) | 1996-07-01 | 1999-11-09 | Walbro Corporation | Fuel tank level equalizer system |
-
2002
- 2002-03-01 DE DE10208824A patent/DE10208824A1/de not_active Withdrawn
-
2003
- 2003-02-18 WO PCT/DE2003/000509 patent/WO2003074863A1/de active IP Right Grant
- 2003-02-18 DE DE50300770T patent/DE50300770D1/de not_active Expired - Lifetime
- 2003-02-18 AT AT03708040T patent/ATE299554T1/de not_active IP Right Cessation
- 2003-02-18 US US10/506,307 patent/US7036488B2/en not_active Expired - Fee Related
- 2003-02-18 EP EP03708040A patent/EP1481156B1/de not_active Expired - Lifetime
- 2003-02-18 ES ES03708040T patent/ES2244923T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03074863A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE299554T1 (de) | 2005-07-15 |
US20050103314A1 (en) | 2005-05-19 |
EP1481156B1 (de) | 2005-07-13 |
ES2244923T3 (es) | 2005-12-16 |
US7036488B2 (en) | 2006-05-02 |
DE10208824A1 (de) | 2003-09-11 |
DE50300770D1 (de) | 2005-08-18 |
WO2003074863A1 (de) | 2003-09-12 |
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