EP0873473B1 - Kraftstoffeinspritzsystem - Google Patents

Kraftstoffeinspritzsystem Download PDF

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Publication number
EP0873473B1
EP0873473B1 EP97932714A EP97932714A EP0873473B1 EP 0873473 B1 EP0873473 B1 EP 0873473B1 EP 97932714 A EP97932714 A EP 97932714A EP 97932714 A EP97932714 A EP 97932714A EP 0873473 B1 EP0873473 B1 EP 0873473B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
fuel
fuel injection
injection system
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
Application number
EP97932714A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0873473A1 (de
Inventor
Horst Klinger
Uwe Kuhn
Bernd Rosenau
Peter Traub
Gerd Loesch
Sandro Soccol
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 EP0873473A1 publication Critical patent/EP0873473A1/de
Application granted granted Critical
Publication of EP0873473B1 publication Critical patent/EP0873473B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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

Definitions

  • the invention relates to a fuel injection system the genus of claim 1.
  • a series injection pump is provided, the three pump pistons with corresponding pump work rooms.
  • This pump piston delivers into the high-pressure fuel accumulator in a controlled quantity, the fuel injection quantity high-pressure delivery by one by one electrical control device controlled solenoid valve takes place in a discharge line of the respective Pump work room is arranged and with the closing the High pressure delivery phase determined.
  • the each pump workspace through a piston-guided one Control edge connected to a fuel supply, so that the Pump workspace in bottom dead center with Fuel is filled.
  • the pump pistons are thereby Multiple cams driven, so that they are synchronous to respective fuel injection point of each Fuel injection valves have their high-pressure delivery phase and thus approximately the same pressure in the high-pressure fuel reservoir can be adjusted. With help of a Pressure sensor, this pressure is detected and corresponding to a Setpoint from the electrical control device Control signal sent to the respective solenoid valves.
  • This device has the disadvantage that it is very complex Control required for each pump element of the high pressure pump is.
  • a pressure change in the high-pressure accumulator can only be carried out when one High pressure fuel injection takes place, so that a spontaneous Change in a higher pressure level in the high-pressure fuel reservoir can only be carried out with a delay.
  • Around a pressure change in the memory can cause the pressure only increase during injection. That results in an undefined State of the memory pressure during the Injection so that it is difficult to get the right amount of injection as a sum effect of at a certain metering cross-section current pressure and time.
  • a fuel injection system of the type according to the invention has a high-pressure pump 1, which is synchronous with the speed associated internal combustion engine is driven. This sucks 2 fuel from a fuel tank and promotes this via a high-pressure fuel line 3, preferably controlled by an electrically controlled control valve, here a solenoid valve 4, and one in the conveying direction opening check valve 5 in a high-pressure fuel accumulator 6.
  • Fuel lines 8 lead from these Fuel injection valves 9 on the internal combustion engine 10. The from the fuel injection valves 9 to the internal combustion engine the amount of fuel delivered is in each case by a preferably electrically controlled valve, in In the present embodiment, a solenoid valve 11 is controlled.
  • valves are controlled by a Electrical control unit 14, the signals from a pressure sensor 15 receives the pressure in the high-pressure fuel reservoir detected.
  • the electrical control unit also receives signals of a speed sensor, an TDC sensor and other parameters of the internal combustion engine, such as the desired speed and operating conditions of the internal combustion engine and controls the fuel injection valves 9 accordingly With the help of the solenoid valves 11 according to quantity and time of injection of fuel.
  • the electrical control unit also controls the solenoid valve 4, which is the delivery rate of the high pressure pump controls in the fuel storage and with this control the pressure in the fuel storage at the desired value holds.
  • the high pressure pump shown only symbolically in FIG. 1 with solenoid valve 4 and check valve 5 is more detailed in Figure 2 shown.
  • a first pump element 16 and a second pump element 17 Each of the Pump elements has a pump cylinder 19 in which a Pump piston 20, which is driven by a drive cam 22 is moved against the force of a spring 21.
  • the pump pistons close each one in the cylinder 19 Working space 23, which via a fuel pressure line, in arranged in each case the pressure valve 5 opening in the conveying direction is connected to the high-pressure fuel reservoir 6 is.
  • the pump work space is filled in each case via a filling bore 25, which is at the bottom dead center of the pump piston is opened by the end edge 26, so that Fuel from the reservoir 2 or if necessary via a pre-feed pump 24 into the pump work space 23 its full fulfillment can come.
  • Delivery stroke is the filling bore 25 through the pump piston closed and the existing in the pump work room 23 Compressed fuel.
  • This process then leads to High-pressure delivery in the high-pressure fuel reservoir 6, if that in a relief line 27 of the pump work space 23 arranged solenoid valve 4 is closed.
  • This Solenoid valves 4 are, as already said above, by the electrical one Control unit 14 controlled so that it is in the high-pressure fuel reservoir 6 sets a desired pressure.
  • the first pump element 16 controlled by the solenoid valve so that the Pump working space 23 over a certain pump piston delivery stroke is closed, so that high-pressure delivery via this stroke into the high pressure accumulator.
  • a bore 28 in the from the end face 26 of the pump piston goes out and to a circumferential control groove 29 am Pump piston leads, it is possible to achieve a maximum delivery stroke of the pump piston by using the control groove this maximum delivery stroke the pump workspace with the Filling hole 25 and thus connects to the low pressure chamber.
  • the Maximum pressure is then preferably promoted by a Closing of the solenoid valve from a certain pump piston stroke initiated and thus controlled the high pressure output.
  • the pressure first increases, which then drops as the injection occurs and after the end of injection by the rest of the High-pressure delivery of the high-pressure fuel pump again the original level can be raised.
  • the high-pressure fuel delivery quantities F the injection quantities adjusted, so there is an overall average pressure level MD a.
  • the second pump element 17 driven, but it is because of the open Solenoid valve 4 no high-pressure delivery in the high-pressure fuel reservoir.
  • the fuel moved by the pump piston 20 is in the fuel tank via the open solenoid valve 2 promoted.
  • the pressure curve shows that with insertion promoting FK the pressure level from a first level D1 is raised to a second level D2. About the Injection remains at this level due to the promotion of the get first pump element.
  • the one in FIG. 5 reproduced curve with pressure decrease at Quantity withdrawal during the injection in FIG. 4 been neglected.
  • a modification of the control of the second pump element according to embodiment Figure 2 can with the second pump element 17 'of Figure 3, the control valve as a control valve 4 ', here again as a solenoid valve instead of in a separate discharge line now also in the inlet of the pre-feed pump 24 to the pump work chamber 23 or Filling bore 25 may be arranged.
  • the previously provided relief line can be omitted.
  • Control valve 4 ' opens so that a complete filling of the Pump work room 23 is possible.
  • the control valve 4 ' is closed.
  • a constant stroke of the pump element also serves here 17 'of the high pressure delivery when it is switched on.
  • the bore 28 with the filling bore 25 via the control groove 29 can also have a check valve 30 producible connection to the pump work room 23 in the Suction phase are provided.
  • a check valve 30 producible connection to the pump work room 23 in the Suction phase are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP97932714A 1996-11-12 1997-06-30 Kraftstoffeinspritzsystem Expired - Lifetime EP0873473B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19646581 1996-11-12
DE19646581A DE19646581A1 (de) 1996-11-12 1996-11-12 Kraftstoffeinspritzsystem
PCT/DE1997/001370 WO1998021470A1 (de) 1996-11-12 1997-06-30 Kraftstoffeinspritzsystem

Publications (2)

Publication Number Publication Date
EP0873473A1 EP0873473A1 (de) 1998-10-28
EP0873473B1 true EP0873473B1 (de) 2002-03-20

Family

ID=7811337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97932714A Expired - Lifetime EP0873473B1 (de) 1996-11-12 1997-06-30 Kraftstoffeinspritzsystem

Country Status (9)

Country Link
US (1) US6095118A (es)
EP (1) EP0873473B1 (es)
JP (1) JP3889057B2 (es)
KR (1) KR100482907B1 (es)
CN (1) CN1076789C (es)
DE (2) DE19646581A1 (es)
ES (1) ES2174267T3 (es)
RU (1) RU2177077C2 (es)
WO (1) WO1998021470A1 (es)

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BR0008300B1 (pt) * 1999-02-17 2011-08-23 sistema de injeção de combustìvel a gasolina para um motor de combustão interna, e, métodos para controlar a operação de um sistema de injeção de gasolina direta de alimentador comum de alta pressão para um motor de combustão interna, e para controlar um sistema de injeção de combustìvel a gasolina de alimentador comum.
DE19948464A1 (de) * 1999-10-08 2001-04-12 Bosch Gmbh Robert Common-Rail-Kraftstoffeinspritzsystem
US6866025B1 (en) * 1999-11-18 2005-03-15 Siemens Vdo Automotive Corp. High pressure fuel pump delivery control by piston deactivation
EP1101931B1 (de) * 1999-11-19 2006-08-30 CRT Common Rail Technologies AG Hochdruckeinspritzsystem mit Common Rail
JP2001207927A (ja) * 2000-01-26 2001-08-03 Mitsubishi Electric Corp 燃料供給装置
JP2001263198A (ja) * 2000-03-14 2001-09-26 Bosch Automotive Systems Corp 燃料ポンプ及びこれを用いた燃料供給装置
DE10023033A1 (de) * 2000-05-11 2001-11-22 Bosch Gmbh Robert Verfahren zum Betreiben eines Kraftstoffzumesssystems einer direkteinspritzenden Brennkraftmaschine
DE10052629A1 (de) * 2000-10-24 2002-05-08 Bosch Gmbh Robert Kraftstoffhochdruckpumpe mit veränderlicher Fördermenge
DE10057683B4 (de) * 2000-11-21 2005-10-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
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US6899083B2 (en) * 2001-09-10 2005-05-31 Stanadyne Corporation Hybrid demand control for hydraulic pump
DE10153189A1 (de) * 2001-10-27 2003-05-15 Bosch Gmbh Robert Kraftstoffpumpe, Kraftstoffsystem, Verfahren zum Betreiben eines Kraftstoffsystems sowie Brennkraftmaschine
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GB2383295A (en) * 2001-12-19 2003-06-25 Michael Ghahari Repairable solid surface laminate
DE10215021A1 (de) * 2002-04-05 2003-10-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
US7201147B2 (en) * 2002-08-13 2007-04-10 International Engine Intellectual Property Company, Llc Control strategies for a variable displacement oil pump
JP4123952B2 (ja) * 2003-02-06 2008-07-23 トヨタ自動車株式会社 内燃機関の燃料供給システム
DE10315318A1 (de) * 2003-04-04 2004-10-14 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
US6973921B2 (en) * 2003-12-12 2005-12-13 Caterpillar Inc. Fuel pumping system and method
JP4148145B2 (ja) * 2004-01-22 2008-09-10 株式会社デンソー 内燃機関の燃料供給装置
ITBO20040322A1 (it) * 2004-05-20 2004-08-20 Magneti Marelli Powertrain Spa Metodo ed impianto per l'iniezione diretta di carburante in un motore a combustione interna
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EP1612394B1 (en) * 2004-06-30 2011-04-27 C.R.F. Società Consortile per Azioni Fuel injection system for an internal combustion engine with common rail
EP1783355A4 (en) * 2004-07-12 2010-08-25 Yanmar Co Ltd FUEL STORAGE INJECTOR AND FUEL ENGINE WITH FUEL STORAGE INJECTION DEVICE
JP2006046169A (ja) * 2004-08-04 2006-02-16 Toyota Motor Corp 内燃機関の燃料圧力制御装置
JP4552694B2 (ja) 2005-03-02 2010-09-29 トヨタ自動車株式会社 車両の燃料供給装置
CA2602060C (en) * 2005-03-18 2011-05-17 Toyota Jidosha Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7398763B2 (en) 2005-11-09 2008-07-15 Caterpillar Inc. Multi-source fuel system for variable pressure injection
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EP2063093A1 (en) * 2007-11-26 2009-05-27 Delphi Technologies, Inc. Fuel injection system
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DE102008001019A1 (de) * 2008-04-07 2009-10-08 Robert Bosch Gmbh Hochdruckpumpenanordnung mit einstempliger Hochdruckpumpe
DE102008041384A1 (de) * 2008-08-20 2010-02-25 Robert Bosch Gmbh Vorrichtung zur Versorgung einer Verbrennungskraftmaschine mit Treibstoff
US8834134B2 (en) 2010-12-20 2014-09-16 Woodward, Inc. Flow sensing dual pump switching system and method
JP5799919B2 (ja) 2012-09-06 2015-10-28 株式会社デンソー ポンプ制御装置
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Also Published As

Publication number Publication date
RU2177077C2 (ru) 2001-12-20
US6095118A (en) 2000-08-01
DE19646581A1 (de) 1998-05-14
KR19990076969A (ko) 1999-10-25
ES2174267T3 (es) 2002-11-01
JP3889057B2 (ja) 2007-03-07
EP0873473A1 (de) 1998-10-28
KR100482907B1 (ko) 2005-07-21
CN1076789C (zh) 2001-12-26
DE59706681D1 (de) 2002-04-25
WO1998021470A1 (de) 1998-05-22
JP2000505177A (ja) 2000-04-25
CN1207160A (zh) 1999-02-03

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