EP1291520A2 - Druckregelanordnung - Google Patents
Druckregelanordnung Download PDFInfo
- Publication number
- EP1291520A2 EP1291520A2 EP02016456A EP02016456A EP1291520A2 EP 1291520 A2 EP1291520 A2 EP 1291520A2 EP 02016456 A EP02016456 A EP 02016456A EP 02016456 A EP02016456 A EP 02016456A EP 1291520 A2 EP1291520 A2 EP 1291520A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- chamber
- pressure control
- valve
- 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.)
- Withdrawn
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Classifications
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- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/54—Arrangement of fuel pressure regulators
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- 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
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- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
Definitions
- the invention relates to a pressure control arrangement for the supply of fuel from one to one Fuel tank arranged fuel pump via a fuel line to a fuel distribution device an internal combustion engine with one arranged in the fuel tank Pressure control valve that branches fuel from the fuel line when open and leads back into the fuel tank, the pressure control valve having a first and a second Has chamber which is liquid-tight by a membrane actuating a valve closing member are separated from one another, the first chamber having at least one inlet opening has, which is connected to the fuel line via a first branch line, and at least has an outlet opening leading into the fuel tank, the second chamber has a spring element that biases the valve closing member in the closing direction.
- Such a pressure control arrangement is, for example, from the French patent application 2730526 known.
- This document describes a so-called non-return fuel system, that only one connecting line from the fuel tank to the fuel pump Provides fuel distribution device on the engine. By doing without a so-called return line from the engine to the fuel tank, this fuel system is particularly suitable for to comply with strict emissions laws.
- the FR proposes to guarantee throughputs in the fuel line 2730526 a first pressure regulator arranged in the tank and a second shortly before the Fuel distribution device arranged outside the tank in the fuel line pressure regulator in front. Excess fuel can be returned to the fuel tank via the first pressure regulator be directed to the fuel at different flow rates to discharge constant pressure from the tank.
- the second pressure regulator has the task of Compensate for pressure losses within the fuel line and to ensure that at different engine load conditions there is also a constant pressure level. Even though this fuel system only has a fuel line to the fuel distribution device, it has the disadvantage that an additional regulator, namely the second pressure regulator, must be provided. This arrangement in turn means that special connection and sealing measures must be taken to ensure strict emission devices to fulfill.
- the present invention is therefore based on the object of a remedy for the above to create problems described.
- the second chamber of the pressure control valve has a second inlet opening, which via a second branch line with a Switching element is connected to the fuel line in such a way that different pressure levels are adjustable in the second chamber.
- the measures according to the invention now make it possible to reduce the emissions-relevant Arrange components in the fuel tank, so that a non-return fuel system with a continuous fuel line is feasible.
- the pressure control arrangement according to the invention ensures that the flow-related losses in the fuel line are balanced and the fuel pressure can be adapted to the different engine load conditions is.
- the second chamber has one second outlet opening, and in the second inlet opening is a first nozzle with the Diameter D1 arranged.
- a second nozzle can be in the second outlet opening be arranged with the diameter D2, D2 being larger than D1 and the nozzles in this way are dimensioned so that the pressure drop across the two nozzles is the total pressure of the fuel pump corresponds, the switching element being a 2/2-way valve.
- a pressure relief valve can also be arranged, which in the aimed at the second chamber pressure increase opens, the switching element a 3/2-way valve is.
- the switching element is a pulse width modulated electrohydraulic converter that has a stepless adjustment of the pressure level in the second chamber.
- a pressure sensor to be provided in the fuel distribution device is connected to the electro-hydraulic converter via a control element.
- FIG. 1 shows the fuel flow in a schematic form in a not shown Internal combustion engine, being taken from a fuel tank 1 by a pump 2 via a fuel line 3 fuel is led to a fuel distribution device 4.
- a pressure control arrangement 5 is provided in addition to the pump 2 in the fuel tank 1. Due to the inventive design of this pressure control arrangement 5, it is possible to arrange emission-related components in the fuel tank 1, only one Fuel line 3 is led to the outside and the fuel to the fuel distribution device 4 leads.
- a first branch line 6 branches off from the fuel line 3 and connects with a first one Inlet opening 7 of a pressure control valve 8 is connected.
- a closing member 11 of the pressure control valve 8 consists in a known manner of one arranged on a membrane 12 Valve closing member 13, the membrane separating the first chamber 9 from a second Chamber 14 separates and the valve closing member moves to an open position when there is a pressure level in the first chamber 9 which generates a force which is greater than that Force generated by the pressure level of the second chamber 14.
- the pressure control arrangement 5 has a second branch line 15 on, in which a switching element 16 is arranged, and to a second inlet opening 17 of the pressure control valve 8 leads. Via the second inlet opening 17 fuel can in the second chamber 14 are performed. Furthermore, points in the present embodiment the pressure control valve 8 also has a second outlet opening 18. Both in the inlet opening 17 is a nozzle 19 and a nozzle 20 is arranged in the outlet opening 18. To one To be able to realize pressure drop via the two nozzles is the nozzle 20 with a Diameter D2 executed, which is larger than the diameter D1 of the nozzle 19. In addition a spring element 21 is provided in a known manner in the second chamber 14, that the Valve closing member 11 biased in the closing direction. The switching element 16 is in the present Fall from a simple 2/2-way valve.
- the pressure control arrangement 5 according to FIG. 1 now works as follows:
- a fuel pressure of approx. 4 bar should be reached can be realized in the fuel line. Special losses in the line or due to there is no high engine load in this operating state.
- the electromagnetic 2/2-way valve 5 is in this case deenergized, so that an atmospheric pressure in the second chamber 12 of 1 bar and only the spring force on the closing element 11 acts.
- This spring force is set so that the closing member 11 at a pressure in the first chamber 9 of more than 4 bar opens and fuel through the outlet opening 10 in the Fuel tank is recycled.
- the nozzles 19, 20 are measured so that the sum of the Pressure drops at the nozzles 19, 20 corresponds to the total pressure of the pump.
- the pressure adjustment speed depends on that Dead volume of the controlled system and the nozzle sizes. Large nozzles increase the adjustment speed, but also mean more volume loss of the fuel pump 2. Since both Nozzles are subject to the same flow laws, the additional pressure is influenced by such as fuel viscosity, fuel temperature or the like is not affected. It it should be clear that the nozzles in the present exemplary embodiment are only schematic are shown, needle nozzles or the like can also be used.
- FIG. 2 shows a further embodiment of the pressure control arrangement 5 according to the invention shown.
- a pressure relief valve 22 in the second instead of the nozzle 20 Outlet opening 18 arranged.
- This pressure relief valve 22 is also designed that it opens at a pressure of 5 bar.
- Switching element 16 uses a 3/2-way valve in the present exemplary embodiment. A Pressure adjustment from base pressure to increased pressure takes place in this exemplary embodiment faster, because there is no volume during the start-up process Pressure relief valve 22 is lost.
- the pressure relief valve allows 22 an exact setting of the additional pressure.
- the switching element 16 is designed as a pulse-width-modulated electrohydraulic converter his.
- the second chamber 12 has no second outlet opening and in the No inlet 19 is also provided for the inlet opening 17.
- the pulse width modulated electrohydraulic converter 16 can be a pressure setting in the known second chamber 12 can be made.
- the converter 23 is operated by a control unit 23 driven, which in turn with a sensor arranged in the distribution device 4 24 is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (6)
- Druckregelanordnung für die Kraftstoffzufuhr von einer in einem Kraftstofftank angeordneten Kraftstoffpumpe über eine Kraftstoffleitung zu einer Kraftstoffverteileinrichtung einer Brennkraftmaschine mit einem in dem Kraftstofftank angeordneten Druckregelventil, das im geöffneten Zustand Kraftstoff aus der Kraftstoffleitung abzweigt und zurück in den Krafstofftank führt, wobei das Druckregelventil eine erste und eine zweite Kammer aufweist, die durch eine ein Ventilschließglied betätigende Membrane flüssigkeitsdicht voneinander getrennt sind, wobei die erste Kammer zumindest eine Einlaßöffnung aufweist, die über eine erste Abzweigleitung mit der Kraftstoffleitung verbunden ist, und zumindest eine Auslaßöffnung aufweist, die in den Kraftstofftank führt, wobei die zweite Kammer ein Federelement aufweist, das das Ventilschließglied in Schließrichtung vorspannt, dadurch gekennzeichnet, daß die zweite Kammer (14) des Druckregelventils (8) eine zweite Einlaßöffnung (17) aufweist, die über eine zweite Abzweigleitung (15) mit einem Schaltorgan (16) mit der Kraftstoffleitung (3) derart verbunden ist, daß unterschiedliche Druckniveaus in der zweiten Kammer (14) einstellbar sind.
- Druckregelanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Kammer (14) eine zweite Auslaßöffnung (18) aufweist, und daß in der zweiten Einlaßöffnung (17) eine erste Düse (19) mit dem Durchmesser D1 angeordnet ist.
- Druckregelanordnung nach Anspruch 2, dadurch gekennzeichnet, daß in der zweiten Auslaßöffnung (18) eine zweite Düse (20) mit dem Durchmesser D2 angeordnet ist, wobei D2 größer als D1 ist und die Düsen (19, 20) derart dimensioniert sind, daß der Druckabfall über den beiden Düsen (19, 20) dem Gesamtdruck der Kraftstoffpumpe (2) entspricht, wobei das Schaltorgan (16) ein 2/2-Wege-Ventil ist.
- Druckregelanordnung nach Anspruch 2, dadurch gekennzeichnet, daß in der zweiten Auslaßöffnung (18) ein Druckbegrenzungsventil (22) angeordnet ist, das bei der in der zweiten Kammer (14) angestrebten Druckerhöhung öffnet, wobei das Schaltorgan (16) ein 3/2-Wege-Ventil ist.
- Druckregelanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Schaltorgan (16) ein pulsweitenmodulierter elektrohydraulischer Wandler ist, der eine stufenlose Einstellung des Druckniveaus in der zweiten Kammer (14) ermöglicht.
- Druckregelanordnung nach Anspruch 5, dadurch gekennzeichnet, daß ein Drucksensor (24) in der Kraftstoffverteileinrichtung (4) vorgesehen ist, der über ein Steuerelement (23) mit dem elektrohydraulischer Wandler (23) verbunden ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10143891A DE10143891A1 (de) | 2001-09-07 | 2001-09-07 | Druckregelanordnung |
| DE10143891 | 2001-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1291520A2 true EP1291520A2 (de) | 2003-03-12 |
| EP1291520A3 EP1291520A3 (de) | 2003-11-05 |
Family
ID=7698051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02016456A Withdrawn EP1291520A3 (de) | 2001-09-07 | 2002-07-23 | Druckregelanordnung |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20030047169A1 (de) |
| EP (1) | EP1291520A3 (de) |
| DE (1) | DE10143891A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008149384A1 (en) * | 2007-06-08 | 2008-12-11 | Ucal Fuel Systems Limited | Variable pressure fuel injection system |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004020941B9 (de) * | 2004-04-28 | 2006-05-04 | Pierburg Gmbh | Druckregelanordnung |
| WO2007097195A1 (ja) * | 2006-02-20 | 2007-08-30 | Aisan Kogyo Kabushiki Kaisha | 燃料供給装置 |
| JP2009002294A (ja) | 2007-06-25 | 2009-01-08 | Aisan Ind Co Ltd | 燃料供給装置 |
| DE102007039892A1 (de) * | 2007-08-23 | 2009-02-26 | Continental Automotive Gmbh | Einspritzanlage für eine Brennkraftmaschine |
| JP4704407B2 (ja) * | 2007-10-26 | 2011-06-15 | 愛三工業株式会社 | 燃料供給装置 |
| JP2010185449A (ja) * | 2009-01-13 | 2010-08-26 | Aisan Ind Co Ltd | 燃料供給装置 |
| US8042520B2 (en) * | 2009-05-12 | 2011-10-25 | GM Global Technology Operations LLC | Engine startup fuel pressure control systems and methods |
| CN117515407A (zh) * | 2024-01-03 | 2024-02-06 | 浙江浙能迈领环境科技有限公司 | 一种船舶lng蒸发气回收利用装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4425252C2 (de) * | 1994-07-16 | 1997-08-21 | Vdo Schindling | Kraftstoff-Fördervorrichtung |
| FR2730526B1 (fr) * | 1995-02-13 | 1997-05-09 | Marwal Systems | Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression |
| DE19805070C2 (de) * | 1998-02-09 | 1999-11-25 | Bosch Gmbh Robert | Kraftstoff-Fördermodul für eine Benzindirekteinspeisung einer Brennkraftmaschine mit einem Ventil |
| US5967119A (en) * | 1998-03-11 | 1999-10-19 | General Motors Corporation | Electronically variable pressure control |
| DE19957742A1 (de) * | 1999-12-01 | 2001-06-07 | Bosch Gmbh Robert | Kraftstoffzuführvorrichtung für einen Verbrennungsmotor |
| DE10005471A1 (de) * | 2000-02-08 | 2001-08-09 | Bayerische Motoren Werke Ag | Kraftstoffversorgungsanlage für eine Brennkraftmaschine |
-
2001
- 2001-09-07 DE DE10143891A patent/DE10143891A1/de not_active Withdrawn
-
2002
- 2002-07-23 EP EP02016456A patent/EP1291520A3/de not_active Withdrawn
- 2002-09-06 US US10/236,765 patent/US20030047169A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008149384A1 (en) * | 2007-06-08 | 2008-12-11 | Ucal Fuel Systems Limited | Variable pressure fuel injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1291520A3 (de) | 2003-11-05 |
| US20030047169A1 (en) | 2003-03-13 |
| DE10143891A1 (de) | 2003-03-27 |
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| RIC1 | Information provided on ipc code assigned before grant |
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