EP0733797B1 - Brennstoffversorgungssystem für Brennkraftmaschinen - Google Patents
Brennstoffversorgungssystem für Brennkraftmaschinen Download PDFInfo
- Publication number
- EP0733797B1 EP0733797B1 EP95120481A EP95120481A EP0733797B1 EP 0733797 B1 EP0733797 B1 EP 0733797B1 EP 95120481 A EP95120481 A EP 95120481A EP 95120481 A EP95120481 A EP 95120481A EP 0733797 B1 EP0733797 B1 EP 0733797B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- internal combustion
- pump
- pressure switch
- 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.)
- Expired - Lifetime
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- 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
- F02M2037/085—Electric circuits therefor
- F02M2037/087—Controlling fuel pressure valve
Definitions
- the invention relates to a fuel supply system for internal combustion engines according to the preamble of claim 1.
- Such systems consist of a fuel pump and a pressure regulator, wherein the pressure regulator is arranged downstream of a distributor bar and Excess fuel can flow into the fuel tank.
- the fuel pump works with a large flow against regulated fuel pressure.
- longer idle and partial load operation of the Internal combustion engine is fueled by the engine's waste heat in large Quantities returned to the tank, causing increased vapor pressure and Gas bubbles can form in the fuel drawn in by the pump.
- a supply device is known in which a pressure switch inserted between the fuel pump and the distributor strip Pump outlet pressure dependence between conductive and non-conductive switches and thereby the fuel pump with a control circuit different electrical power is supplied when the Pump outlet pressure over or above a threshold value of the pressure switch falls below.
- DE-A1-31 02 983 describes a device for controlling the Fuel supply is known in which a pressure regulator is a switch / resistor adjusted, its resistance from the amount of fuel flowing back depending on the power supply of the fuel pump controls. This device also occurs Increase in the fuel temperature in the tank and there is a larger pump pressure fluctuation through the switching hysteresis.
- a pressure regulator for a return-free fuel supply system in which a pressure switch controls the power supply to the fuel pump and in addition a reducing pressure regulator is used, the Reduced pressure is lower than the pressure regulated by the pressure switch.
- the power supply is controlled via a pulse width modulator, ie there is no pump shutdown.
- a fuel supply system according to the preamble of patent claim 1 is also known from WO 96/10693.
- the object of the invention is to create a generic one To design the fuel supply system such that a reduced pressure fluctuation at the Distribution rail is present, there is no increase in fuel temperature caused by engine waste heat and, moreover, pump operation with an overall reduced power supply can be achieved.
- Fig. 1 shows schematically an inventive fuel supply system for Internal combustion engines, formed from a fuel pump 1 with electrical connections a fuel flank 2 is connected and via a fuel pressure line 3 to the 5 internal combustion engine promotes.
- a pressure switch 4 In the course of the pressure line 3 is a pressure switch 4 and subsequently on Reducing pressure regulator 5 arranged, the output line 6 with a manifold 7 of Internal combustion engine is connected.
- the reducing pressure regulator 5 is set so that the reducing pressure is less than is the pressure regulated / set by the pressure switch 4.
- the use of the reducing pressure regulator 5 ensures that the Pressure switch 4 outgoing pressure fluctuations in the fuel pressure line 3 do not penetrate into the distributor strip 7.
- FIG. 2 shows a section of the pressure switch from FIG. 1. This consists of a microswitch 8 with electrical connections and a switch lever 9, which is opened by a membrane rod 10 in two positions, switches - closed, can be adjusted.
- the membrane rod 10 is connected to a membrane 11, the one Storage membrane chamber 12 limited.
- This storage membrane chamber 12 is connected via a branch 13 to the fuel pressure line 3, wherein upstream of the branch 13 a check valve 14 in the Fuel pressure line 3 is arranged.
- the fuel pump 1 delivered fuel passes through the check valve 14 to the Reduced pressure regulator 5 and at the same time in the storage membrane chamber 12.
- the membrane rod 10 When the storage membrane chamber 12 is filled, the membrane rod 10 is also adjusted a stop surface 16, the switch lever 9 in the "switch open” position, whereby the power supply, possibly via an amplifier circuit, for Fuel pump 1 is interrupted. This interruption will last maintained until the storage membrane chamber 12 is almost empty and the membrane rod 10 with another stop surface 17, the switch lever 9 in the "switch closed” position. So that the Repeat process.
- the check valve 14 prevents fuel backflow through the switched off fuel pump 1. It goes without saying that everyone Line part of the fuel pressure line 3 secured via pressure relief valves may be, which is why there is no need for a representation in this regard.
- the distance between the two stop surfaces of the membrane rod determines in Connection with the diaphragm adjustment the switching hysteresis. It can be beneficial be that the reducing pressure regulator 5 with the suction pressure of the Internal combustion engine is acted upon. There is a connecting line 18 for this intended.
- the storage volume 12 at turned off internal combustion engine by a fuel cut-off valve 19 is closed, which is arranged in the branch 13 and during commissioning the internal combustion engine opens.
- This measure serves for security Accidents, reduces fuel leakage, and avoids fuel delivery turned off internal combustion engine from the storage volume 12 to the distributor bar 7 or the injection valves, not shown, so that uncontrolled entry of fuel in the combustion chambers, e.g. B. with leaky valves excluded is (water hammer).
- Storage membrane chamber 12 By switching off the fuel pump in the filled phases Storage membrane chamber 12 result in the idle and partial load operation of the Internal combustion engine significant fuel savings compared to the phases in which the fuel pump works against pressure with the greatest delivery capacity got to.
- the delivery rate of the fuel pump is the consumption of the Internal combustion engine adapted.
- the poor efficiency of the electric motor plays here Fuel pump and that of the electricity-generating generator a considerable one Role.
- the switch can alternatively consist of a potentiometer, whereby then a voltage-dependent switching device is provided, which Power supply to the internal combustion engine at low voltage on Turn the potentiometer on and off at high voltage or vice versa.
- the membrane of the present embodiment can also be replaced by a piston.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
Die Steuerung der Leistungszufuhr erfolgt über einen Pulsweitenmodulator, d. h. es liegt keine Pumpenabschaltung vor.
ein erfindungsgemäßen Brennstoffversorgungssystem,
eine Ausbildung des Druckschalters aus Fig. 1.
Claims (2)
- Brennstoffversorgungssystem für Brennkraftmaschinen, gebildet aus Brennstoffpumpe (1), Druckschalter (4) und Verteilerleiste/Anschlüssen für Einspritzventile, wobei der Druckschalter (4) die Leistungszufuhr zur Brennstoffpumpe (1) in Abhängigkeit vom Pumpendruck steuert und stromab des Druckschalters (4) zusätzlich ein Reduzierdruckregler (5) eingesetzt ist, dessen Reduzierdruck niedriger als der vom Druckschalter (4) geregelte Druck ist,
dadurch gekennzeichnet,
daß der Druckschalter (4) mit einem Speichervolumen (12) ausgestattet ist, das durch eine Membrane/einen Kolben (11) begrenzt ist, die/der im Zusammenhang mit einer Stange (10) mit zwei Anschlagflächen (16, 17) eine Öffnung von Schaltkontakten (8) bei großem gespeicherten Brennstoffvolumen und deren Schließung bei kleinem bewirkt. - System nach Anspruch 1,
dadurch gekennzeichnet,
daß das Speichervolumen (12) bei abgestellter Brennkraftmaschine durch ein Brennstoffabschaltventil (19) verschlossen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19510494 | 1995-03-23 | ||
DE19510494A DE19510494A1 (de) | 1995-03-23 | 1995-03-23 | Brennstoffversorgungssystem für Brennkraftmaschinen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0733797A2 EP0733797A2 (de) | 1996-09-25 |
EP0733797A3 EP0733797A3 (de) | 1997-04-02 |
EP0733797B1 true EP0733797B1 (de) | 1998-07-15 |
Family
ID=7757429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95120481A Expired - Lifetime EP0733797B1 (de) | 1995-03-23 | 1995-12-22 | Brennstoffversorgungssystem für Brennkraftmaschinen |
Country Status (4)
Country | Link |
---|---|
US (1) | US5765535A (de) |
EP (1) | EP0733797B1 (de) |
DE (2) | DE19510494A1 (de) |
ES (1) | ES2118497T3 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19627741A1 (de) * | 1996-07-10 | 1998-01-15 | Mannesmann Vdo Ag | Druckhalteeinrichtung |
DE19709446C1 (de) * | 1997-03-07 | 1998-10-15 | Bosch Gmbh Robert | Fördereinrichtung für Brennstoff |
CN1111648C (zh) * | 1999-05-26 | 2003-06-18 | 三菱电机株式会社 | 燃料供给装置及燃料压力调节装置 |
US6415657B1 (en) | 2000-09-11 | 2002-07-09 | Daimlerchrysler Corporation | Switch monitoring system |
US6279541B1 (en) * | 2000-12-01 | 2001-08-28 | Walbro Corporation | Fuel supply system responsive to engine fuel demand |
JP3786262B2 (ja) | 2002-04-16 | 2006-06-14 | 三菱電機株式会社 | 自動車用燃料供給装置 |
DE10223077B4 (de) * | 2002-05-24 | 2004-05-06 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem für Brennkraftmaschinen mit Niederdruckspeicher |
US7098854B2 (en) * | 2004-09-09 | 2006-08-29 | Raytheon Company | Reflect antenna |
US7431020B2 (en) * | 2006-11-30 | 2008-10-07 | Denso International America, Inc. | Adaptive fuel delivery module in a mechanical returnless fuel system |
US7640916B2 (en) | 2008-01-29 | 2010-01-05 | Ford Global Technologies, Llc | Lift pump system for a direct injection fuel system |
US8312866B2 (en) * | 2008-10-31 | 2012-11-20 | Ford Global Technologies, Llc | Fuel system diagnosis via fuel pressure switch |
US20140165965A1 (en) * | 2012-12-18 | 2014-06-19 | Michael R. Teets | Fuel supply system with accumulator |
US9470195B2 (en) * | 2012-12-18 | 2016-10-18 | Fca Us Llc | Fuel supply system with accumulator |
DE102014222339B4 (de) * | 2014-10-31 | 2020-07-09 | Vitesco Technologies GmbH | Vorrichtung und Verfahren zum Erfassen eines Betriebsdrucks einer Kraftstoffpumpe für ein Kraftfahrzeug |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1404152A (en) * | 1918-08-05 | 1922-01-17 | Delco Light Co | Fuel-supply system |
US1580489A (en) * | 1923-12-03 | 1926-04-13 | Gen Motors Res Corp | Fuel-supply system |
DE2142459A1 (de) * | 1971-08-25 | 1973-03-01 | Walter Swoboda | Einspritzanlage fuer verbrennungsmotoren |
US4359984A (en) * | 1979-05-25 | 1982-11-23 | Kiyoharu Nakao | Fuel control device for diesel engine |
GB2070802B (en) * | 1980-01-31 | 1984-08-22 | Nissan Motor | Control of fuel supply to an ic engine |
JPS6172865A (ja) * | 1984-09-14 | 1986-04-14 | Nippon Carbureter Co Ltd | エンジンの燃料供給装置 |
JPH0681931B2 (ja) * | 1986-06-25 | 1994-10-19 | 日本電装株式会社 | 燃料ポンプ制御装置 |
US4728264A (en) * | 1986-10-10 | 1988-03-01 | Walbro Corporation | Fuel delivery system with pressure-controlled electric pump |
US4920942A (en) * | 1987-04-24 | 1990-05-01 | Diesel Kiki Co., Ltd. | Method and apparatus for supplying fuel to internal combustion engines |
US4919102A (en) * | 1988-07-15 | 1990-04-24 | Jidosha Kiki Co., Ltd. | Fuel pump driving apparatus for vehicle |
US5231967A (en) * | 1991-01-04 | 1993-08-03 | Outboard Marine Corporation | Fuel pump and fuel filter for a marine installation |
US5133323A (en) * | 1991-06-25 | 1992-07-28 | Siemens Automotive L.P. | Intake manifold pressure compensation for the closed-loop pressure regulation of a fuel pump |
US5265644A (en) * | 1992-06-02 | 1993-11-30 | Walbro Corporation | Fuel pressure regulator |
US5337718A (en) * | 1992-06-02 | 1994-08-16 | Walbro Corporation | Electronic fuel injection system with heat-pressure response |
FR2695964B1 (fr) * | 1992-09-24 | 1995-07-21 | Walbro Corp | Circuit de distribution de carburant pour moteur a combustion interne. |
US5237975A (en) * | 1992-10-27 | 1993-08-24 | Ford Motor Company | Returnless fuel delivery system |
US5509390A (en) * | 1994-01-14 | 1996-04-23 | Walbro Corporation | Temperature-responsive demand fuel pressure regulator |
US5398655A (en) * | 1994-01-14 | 1995-03-21 | Walbro Corporation | Manifold referenced returnless fuel system |
FR2725245B1 (fr) * | 1994-10-03 | 1996-12-20 | Marwal Systems | Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression |
-
1995
- 1995-03-23 DE DE19510494A patent/DE19510494A1/de not_active Withdrawn
- 1995-12-22 DE DE59502823T patent/DE59502823D1/de not_active Expired - Fee Related
- 1995-12-22 ES ES95120481T patent/ES2118497T3/es not_active Expired - Lifetime
- 1995-12-22 EP EP95120481A patent/EP0733797B1/de not_active Expired - Lifetime
-
1996
- 1996-03-20 US US08/618,939 patent/US5765535A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2118497T3 (es) | 1998-09-16 |
DE59502823D1 (de) | 1998-08-20 |
EP0733797A2 (de) | 1996-09-25 |
DE19510494A1 (de) | 1996-09-26 |
US5765535A (en) | 1998-06-16 |
EP0733797A3 (de) | 1997-04-02 |
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