EP2507503B1 - Kraftstoffeinspritzvorrichtung mit differenzmengenregelung bei elektrischer vorförderpumpe - Google Patents

Kraftstoffeinspritzvorrichtung mit differenzmengenregelung bei elektrischer vorförderpumpe Download PDF

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Publication number
EP2507503B1
EP2507503B1 EP10761005.7A EP10761005A EP2507503B1 EP 2507503 B1 EP2507503 B1 EP 2507503B1 EP 10761005 A EP10761005 A EP 10761005A EP 2507503 B1 EP2507503 B1 EP 2507503B1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel
valve
pump
injection device
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.)
Not-in-force
Application number
EP10761005.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2507503A1 (de
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2507503A1 publication Critical patent/EP2507503A1/de
Application granted granted Critical
Publication of EP2507503B1 publication Critical patent/EP2507503B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/0215—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by draining or closing fuel conduits
    • 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
    • F02M37/041—Arrangements for driving gear-type pumps

Definitions

  • the invention relates to a fuel injection device according to the preamble of claim 1 ( WO-A-99/43941 ).
  • the prefeed pump is designed as an external gear pump and is driven via the drive shaft of the high pressure pump, wherein the high pressure pump supplied amount of fuel is regulated by a separate metering unit.
  • a safety valve which prevents a breakage of the line or the filter in the event of overpressure, and a venting valve for venting the delivery line, are provided.
  • the delivery rate is controlled by a differential quantity valve which at the same time also assumes the safety function and ventilation function.
  • the differential quantity valve is arranged, for example, in front of a pressure-side fuel filter.
  • the known volume control by means of a metering unit according to the invention can be switched to an example quantity-controlled electric prefeed pump (eg gear pump).
  • Advantage of this solution according to the invention is the same quality as in a regulated electric fuel pump, but safety and ventilation valves are saved, especially since the differential valve has the same effort as a metering unit.
  • the single FIGURE shows an embodiment of the fuel injection device according to the invention.
  • the fuel injector 10 for an internal combustion engine shown in the figure includes a fuel tank 11, a high-pressure fuel pump 12, and a fuel feed pump (eg, gear pump) 13 which has a controlled electric drive 13a and delivers fuel from the fuel tank 11 to the high-pressure pump 12.
  • the high-pressure pump 12 conveys fuel under high pressure into a high-pressure accumulator ("common rail") 14 to which, in turn, fuel injection valves (injectors) 15 are connected, which inject the fuel into the combustion chamber of the internal combustion engine.
  • the pressure in the high pressure accumulator 14 is controlled by a pressure control valve 16 which is connected to a leading back into the fuel tank 11 fuel return line 17 .
  • the prefeed pump 13 is regulated by the pressure prevailing in its pressure-side delivery line 18 fuel pressure (delivery pressure) or the amount of fuel delivered (flow rate).
  • fuel pressure delivery pressure
  • flow rate the amount of fuel delivered
  • a fuel filter 19 is arranged in this leading from the feed pump 13 to the high-pressure pump 12 pressure-side conveying line 18.
  • the pressure or quantity-controlled prefeed pump 13 regulates the delivered total fuel amount A, which is pressed through the filter 19.
  • filter 19 and high-pressure pump 12 is from the pressure-side delivery line 18 from a purge line 20 , whereby the filtered fuel amount is divided into a flow rate B and a purge amount C.
  • the flow B is from the High-pressure pump 12 is conveyed under high pressure into the high-pressure accumulator 14, while the purge amount C is used for purging the high-pressure pump 12 and is guided back into the fuel tank 11 via the fuel return line 17.
  • the exact total amount A through the filter 19 is controlled by a differential amount valve 21 with adjustable valve cross-section, through which the pressure-side delivery line 18 is connected between pre-feed pump 13 and filter 19 to the return line 17.
  • the differential amount valve 21 is electrically controlled, for example via an accelerator pedal 22 and is formed in the embodiment shown as a solenoid valve with a magnetic drive 23 which actuates the valve closing element (ball) 24 of the differential amount valve 21 and thus adjusts the valve cross-section.
  • the further the accelerator pedal 22 is depressed the less far the differential quantity valve 21 is open and the lower the amount of fuel flowing back into the fuel tank 11 via the differential quantity valve 21.
  • the differential quantity valve 21 is closed and the total quantity A conveyed to the filter 19 is thus maximum.
  • the valve closing element 24 is biased by a closing spring 25 in the closing direction and is automatically opened independently of the magnetic drive 23 when the pressure prevailing in the pressure-side delivery line 18 sufficient pressure réelle torturen the valve closing member 24 against the action of the closing spring 25.
  • the differential amount valve 21 thus opens at an overpressure in the pressure-side delivery line 18, for example due to a clogged filter 19, and thus assumes the safety function of a pressure relief valve.
  • the differential quantity valve 21 can be opened electrically for venting and consequently also takes over the venting function of a venting device not shown here in detail. Separate safety and ventilation valves are not required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10761005.7A 2009-12-02 2010-10-04 Kraftstoffeinspritzvorrichtung mit differenzmengenregelung bei elektrischer vorförderpumpe Not-in-force EP2507503B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910047376 DE102009047376A1 (de) 2009-12-02 2009-12-02 Kraftstoffeinspritzvorrichtung mit Differenzmengenregelung bei elektrischer Vorförderpumpe
PCT/EP2010/064710 WO2011067008A1 (de) 2009-12-02 2010-10-04 Kraftstoffeinspritzvorrichtung mit differenzmengenregelung bei elektrischer vorförderpumpe

Publications (2)

Publication Number Publication Date
EP2507503A1 EP2507503A1 (de) 2012-10-10
EP2507503B1 true EP2507503B1 (de) 2015-07-01

Family

ID=43014928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10761005.7A Not-in-force EP2507503B1 (de) 2009-12-02 2010-10-04 Kraftstoffeinspritzvorrichtung mit differenzmengenregelung bei elektrischer vorförderpumpe

Country Status (5)

Country Link
EP (1) EP2507503B1 (zh)
CN (1) CN102770658B (zh)
DE (1) DE102009047376A1 (zh)
IN (1) IN2012DN02867A (zh)
WO (1) WO2011067008A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015016656A1 (de) * 2015-12-19 2017-06-22 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verfahren zur Herstellung eines beschichteten, durch Warmumformung gehärteten Körpers sowie ein nach dem Verfahren hergestellter Körper

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010043374A1 (de) * 2010-11-04 2012-05-10 Robert Bosch Gmbh Kraftstoffeinspritzsystem einer Brennkraftmaschine, sowie Verfahren zur Steuerung des selbigen
DE102013218697A1 (de) * 2013-09-18 2015-03-19 Robert Bosch Gmbh Fördersystem für ein Fluid
IT201700052993A1 (it) * 2017-05-16 2018-11-16 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
CN113074068A (zh) * 2021-04-02 2021-07-06 浙江吉利控股集团有限公司 一种用于车辆的燃料供给系统及其控制方法和车辆

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270720A1 (fr) * 1986-12-12 1988-06-15 Regie Nationale Des Usines Renault Pompe à débit variable
DE3911559A1 (de) * 1989-04-08 1990-10-11 Bosch Gmbh Robert Steuereinrichtung zum stillsetzen einer brennkraftmaschine
DE19549108A1 (de) * 1995-12-29 1997-07-03 Bosch Gmbh Robert System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
WO1999043941A2 (en) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Diesel pump fuel inlet metering using proportional control valve
DE10318941A1 (de) * 2003-04-26 2004-11-11 Robert Bosch Gmbh Kraftstoffsystem für eine Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015016656A1 (de) * 2015-12-19 2017-06-22 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verfahren zur Herstellung eines beschichteten, durch Warmumformung gehärteten Körpers sowie ein nach dem Verfahren hergestellter Körper

Also Published As

Publication number Publication date
EP2507503A1 (de) 2012-10-10
CN102770658B (zh) 2015-01-28
DE102009047376A1 (de) 2011-06-09
WO2011067008A1 (de) 2011-06-09
IN2012DN02867A (zh) 2015-07-24
CN102770658A (zh) 2012-11-07

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