WO2003069145A1 - Systeme d'injection de carburant pour un moteur a combustion interne - Google Patents

Systeme d'injection de carburant pour un moteur a combustion interne Download PDF

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Publication number
WO2003069145A1
WO2003069145A1 PCT/DE2002/004541 DE0204541W WO03069145A1 WO 2003069145 A1 WO2003069145 A1 WO 2003069145A1 DE 0204541 W DE0204541 W DE 0204541W WO 03069145 A1 WO03069145 A1 WO 03069145A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
pressure pump
pump
pressure
metering device
Prior art date
Application number
PCT/DE2002/004541
Other languages
German (de)
English (en)
Inventor
Marcus Marheineke
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 WO2003069145A1 publication Critical patent/WO2003069145A1/fr

Links

Classifications

    • 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
    • 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
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
    • 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
    • F02M63/0225—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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • 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
    • 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

Definitions

  • the invention is based on one
  • Fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is known from DE 198 53 103 AI.
  • This fuel injection device has a high-pressure pump, by means of which fuel is conveyed under high pressure into a reservoir. Injectors arranged on the cylinders of the internal combustion engine are connected to the memory.
  • a feed pump is provided through which fuel is delivered from a storage container to the high-pressure pump.
  • a fuel metering device is also provided for setting the amount of fuel flowing to the high-pressure pump. The fuel metering device is arranged between the feed pump and the high-pressure pump, and a variable flow cross-section is set in the feed to the high-pressure pump.
  • the fuel metering device is controlled in such a way that a quantity of fuel flows to the high-pressure pump, which is required to maintain a predetermined pressure in the accumulator with the fuel delivered by the high-pressure pump.
  • the high pressure pump may no longer be supplied with fuel. Since it is not ensured that the supply of fuel to the high-pressure pump can be completely blocked with the fuel metering device, a so-called zero-feed throttle is additionally provided, which is located in a between the Fuel metering device and the high pressure pump discharging return to the storage container is arranged and through which due to a leak still through
  • Fuel metering fuel passing through is returned to the reservoir.
  • an overflow valve is arranged parallel to the fuel metering device, which regulates the pressure before
  • Fuel metering device is required.
  • Fuel injection device thus has a complex
  • the fuel injection device according to the invention with the features according to claim 1 has the advantage that it has a simple structure and is inexpensive to manufacture. Neither the zero delivery throttle nor the overflow valve of the known fuel injection device are required for this.
  • Fuel injection device for an internal combustion engine of a motor vehicle in a schematic representation.
  • the figure shows a fuel injection device for an internal combustion engine, for example of a motor vehicle.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has one or more cylinders.
  • the fuel injection device has a feed pump 10, which is arranged, for example, in a fuel tank 12 of the motor vehicle, but can also be arranged outside the tank 12.
  • the feed pump 10 can have an electric drive motor and draws fuel from the fuel reservoir 12, for example, via a prefilter 14.
  • the feed pump 10 can also be driven mechanically by the internal combustion engine, for example.
  • a line 16 leads from the outlet of the feed pump 10 to a high-pressure pump 18. Between the feed pump 10 and the high-pressure pump 18, a fuel filter 20 is arranged in the line 16, which is designed as a fine filter and through which the fuel delivered by the feed pump 10 flows.
  • the high-pressure pump 18 has, for example, a plurality of pump elements 22, each of which has a piston 26 which is guided in a cylinder bore 24 and is driven in a lifting movement by means of an eccentric drive 28.
  • the high pressure pump 18 is preferably driven mechanically by the internal combustion engine.
  • the fuel delivered by the high-pressure pump 18 is fed to a reservoir 32 via a line 30.
  • Each pump element 22 has a working space 34 delimited by the piston 26, into which an inlet from the feed pump 10 opens and from which an outlet leads to the reservoir 32.
  • a suction valve 36 opening into the working space 34 is provided in the inlet of each pump element 22 and a pressure valve 38 opening towards the accumulator 32 is provided in the outlet of each pump element 22.
  • the respective suction valve opens 36 and fuel flows into the working space 34 from the feed pump 10 while the pressure valve 38 is closed.
  • An opening pressure of the suction valve 36 is determined by a valve spring 37.
  • the respective pressure valve 38 opens and fuel flows out of the working space 34 to the accumulator 32, while the suction valve 36 is closed.
  • an injector 40 For each cylinder of the internal combustion engine, an injector 40 is provided, through which fuel is injected into the combustion chamber of the cylinder. Each injector 40 is connected to the accumulator 32 via a line 42 and the opening of the injector 40 for fuel injection is controlled by an electrically controlled valve 44 which is controlled by an electronic control device 46. A return 41 can lead from the injectors 40 to the fuel reservoir 12 for fuel that is not injected.
  • a pressure valve 48 can be provided, which opens when a predetermined pressure is exceeded and releases a return via a line 50 from the accumulator 32 into the fuel reservoir 12.
  • a pressure sensor 52 is also arranged on the accumulator 32, by means of which the pressure in the accumulator 32 is detected and which is electrically connected to the control device 46, which is thus supplied with a signal for the pressure prevailing in the accumulator 32.
  • a return 54 can be provided on the high-pressure pump 18, via which, for example, a leakage amount of fuel can flow off and which can open into the line 50.
  • a return 60 leads downstream to the fuel reservoir 12 downstream of the filter 20 can open into line 50, for example.
  • a fuel metering device 62 is arranged in the return 60, through which a flow cross section of the return 60 is set. The fuel metering device 62 is controlled by the control device 46.
  • Fuel metering device 62 has a flow control valve 64 and an actuator 66 which is controlled by the control device 46.
  • the flow cross section of the return 60 can be continuously adjusted between zero and a maximum flow cross section by means of the flow control valve 64.
  • An electromagnet or a piezo actuator can be used as the actuator 66, each of which is supplied with a defined electrical voltage by the control device 46 and thereby brings the flow control valve 64 into a defined position in which it releases a defined flow cross-section.
  • the control device 46 specifies a target pressure in the memory 32.
  • the pressure device 52 provides the control device 46 with a signal for the actual pressure in the accumulator 32.
  • the pressure in the accumulator 32 is dependent on the amount of fuel delivered to the accumulator 32 by the high-pressure pump 18.
  • the amount of fuel delivered by the high-pressure pump 18 can be changed by changing the flow cross-section in the return 60 and thus the amount of fuel flowing out through the return 60 by means of the fuel metering device 62.
  • the fuel metering device 62 is controlled by the control device 46 in such a way that it sets a flow cross-section in the return 60 which is so large that the difference in the amount of fuel flows through it between the amount of fuel delivered by the feed pump 10 and that by the high-pressure pump 18 Maintenance of the specified target pressure to be delivered fuel quantity. If the actual pressure in the accumulator 32 is higher than the target pressure, the high-pressure pump 18 delivers an excessive amount of fuel and the control device controls the fuel metering device 62 in such a way that it releases a larger flow cross section in the return 60 and thus a larger amount of fuel through the Return 60 flows and the amount of fuel delivered by the high pressure pump 18 is reduced.
  • the high-pressure pump 18 delivers too little fuel and the control device controls the fuel metering device 62 in such a way that it releases a smaller flow cross section in the return 60 and thus a smaller amount of fuel through the Return 60 flows and the amount of fuel delivered by the high pressure pump 18 is increased.
  • the opening pressure of the suction valves 36 of the high-pressure pump 18 prevails upstream of the fuel metering device 62 and, downstream of the fuel metering device 62, the pressure prevailing in the fuel reservoir 12, which is at least approximately atmospheric pressure.
  • the outflowing fuel quantity can thus be regulated in a simple manner by setting the flow cross section by means of the fuel metering device 62.
  • an at least approximately linear characteristic curve that is an at least approximately linear relationship between the set flow cross section and the outflowing fuel quantity, can be achieved.
  • the opening pressure of the suction valves 36 can be, for example, approximately 5 bar or less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un système d'injection de carburant présentant une pompe à haute pression (18) qui achemine du carburant à haute pression dans un accumulateur (32) auquel sont raccordés des injecteurs (40) placés au niveau des cylindres du moteur à combustion interne. Une pompe d'alimentation (10) transfère du carburant d'un réservoir de stockage (12) à la pompe à haute pression (18). Une unité de dosage de carburant (62) ajuste la quantité de carburant acheminée par la pompe à haute pression (18) et régule ladite quantité de sorte que la pompe à haute pression (18) achemine dans l'accumulateur (32) la quantité de carburant nécessaire au maintien d'une pression prédéterminée dans l'accumulateur (32). Une conduite de retour (60) située entre la pompe d'alimentation (10) et la pompe à haute pression (18) mène au moins indirectement au réservoir de stockage (12). L'unité de dosage de carburant (62) est placée dans la conduite de retour (60) et ajuste une section d'écoulement de cette dernière de sorte que s'écoule dans ladite conduite de retour une quantité de carburant correspondant à la différence entre la quantité de carburant acheminée par la pompe d'alimentation (10) et la quantité de carburant à acheminer à la pompe à haute pression (18) pour maintenir la pression prédéterminée dans l'accumulateur (32).
PCT/DE2002/004541 2002-02-13 2002-12-11 Systeme d'injection de carburant pour un moteur a combustion interne WO2003069145A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10205811.3 2002-02-13
DE2002105811 DE10205811A1 (de) 2002-02-13 2002-02-13 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2003069145A1 true WO2003069145A1 (fr) 2003-08-21

Family

ID=27618582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/004541 WO2003069145A1 (fr) 2002-02-13 2002-12-11 Systeme d'injection de carburant pour un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE10205811A1 (fr)
WO (1) WO2003069145A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299863A (zh) * 2016-04-15 2017-10-27 罗伯特·博世有限公司 用于控制内燃机的高压喷射系统的输送单元的方法
CN112020602A (zh) * 2018-04-10 2020-12-01 康明斯公司 自适应高压燃料泵系统和预测泵送质量的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE344882T1 (de) * 2004-07-30 2006-11-15 Delphi Tech Inc Zumesseinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549108A1 (de) * 1995-12-29 1997-07-03 Bosch Gmbh Robert System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
WO1999043941A2 (fr) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Dosage de l'admission de carburant d'une pompe diesel utilisant une soupape de commande proportionnelle
DE19846940A1 (de) * 1998-10-12 2000-04-13 Mannesmann Rexroth Ag Pumpenanordnung
DE19853103A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549108A1 (de) * 1995-12-29 1997-07-03 Bosch Gmbh Robert System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
WO1999043941A2 (fr) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Dosage de l'admission de carburant d'une pompe diesel utilisant une soupape de commande proportionnelle
DE19846940A1 (de) * 1998-10-12 2000-04-13 Mannesmann Rexroth Ag Pumpenanordnung
DE19853103A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299863A (zh) * 2016-04-15 2017-10-27 罗伯特·博世有限公司 用于控制内燃机的高压喷射系统的输送单元的方法
CN107299863B (zh) * 2016-04-15 2022-06-14 罗伯特·博世有限公司 用于控制内燃机的高压喷射系统的输送单元的方法
CN112020602A (zh) * 2018-04-10 2020-12-01 康明斯公司 自适应高压燃料泵系统和预测泵送质量的方法
US11486326B2 (en) 2018-04-10 2022-11-01 Cummins Inc. Adaptive high pressure fuel pump system and method for predicting pumped mass

Also Published As

Publication number Publication date
DE10205811A1 (de) 2003-08-21

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