EP1361359A1 - Dispositif d'injection de carburant pour moteurs à combustion interne - Google Patents

Dispositif d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP1361359A1
EP1361359A1 EP03009123A EP03009123A EP1361359A1 EP 1361359 A1 EP1361359 A1 EP 1361359A1 EP 03009123 A EP03009123 A EP 03009123A EP 03009123 A EP03009123 A EP 03009123A EP 1361359 A1 EP1361359 A1 EP 1361359A1
Authority
EP
European Patent Office
Prior art keywords
fuel
high pressure
pressure pump
pump
return
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.)
Granted
Application number
EP03009123A
Other languages
German (de)
English (en)
Other versions
EP1361359B1 (fr
Inventor
Math Lemoure
Juergen Hammer
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 EP1361359A1 publication Critical patent/EP1361359A1/fr
Application granted granted Critical
Publication of EP1361359B1 publication Critical patent/EP1361359B1/fr
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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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

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 from the Literature, for example diesel engine management, publisher Vieweg, 2nd edition 1998, page 262.
  • This Fuel injector has a high pressure pump through which fuel is delivered to a store.
  • a feed pump turns fuel from one Fuel storage tank to the suction side of the high pressure pump promoted.
  • With the memory are on the cylinders
  • Internal combustion engine arranged injectors connected by the fuel is injected into the internal combustion engine. The injectors do not return for injected fuel into the fuel tank from.
  • a return from the high pressure pump also leads to Fuel, for example for leakage or at Lubrication of the drive of the high pressure pump to be discharged Fuel to the fuel tank.
  • a pressure control valve which is electrically operated is, and through the fuel from the store via a Drain into the fuel tank can.
  • the returns from the injectors and from the High pressure pump and the drain from the high pressure pump are thereby to a return line to the fuel tank summarized.
  • the pressure control valve for example, in overrun mode of the internal combustion engine when there is no fuel injection, the pressure in the accumulator be reduced.
  • the Pressure in the memory also in the entire operating range of the Internal combustion engine are regulated, in particular in Engine idling a large amount of fuel must be shut down from the memory. The one from the The amount of fuel returned to injectors also fluctuates strong and depends on the operating state of the internal combustion engine from.
  • the fuel injection device with the Features according to claim 1 has the advantage that by merging the returns of the injectors and the high pressure pump to a common return line a throttle and the mouth of this return line after the pressure control valve the influence of pressure fluctuations due to the fluctuations in the return quantity from the Injectors can be reduced.
  • the Throttle point for the injectors and the high pressure pump be optimally designed and that through the pressure control valve de-energized amount of fuel does not need to be considered.
  • FIG. 1 shows a Fuel injection device for an internal combustion engine of a motor vehicle in a schematic representation
  • Figure 2 a section of the fuel injection device according to a modified version
  • Figure 3 shows a detail the fuel injector according to another modified version.
  • FIG 1 is a fuel injection device for a Internal combustion engine, for example of a motor vehicle shown.
  • the internal combustion engine is preferably one self-igniting internal combustion engine and has one or several cylinders.
  • the fuel injector has a feed pump 10, through which fuel a fuel tank 12 to the suction side of a High pressure pump 14 is promoted.
  • the high pressure pump 14 will mechanically driven by the internal combustion engine.
  • the Feed pump 10 is arranged on the high pressure pump 14, for example flanged to this, and is by the High pressure pump 14 mechanically driven.
  • the feed pump 10 can be designed, for example, as a gear pump.
  • one or more filters can be arranged be, for example a pre-filter 16 and a fine filter 18, which can also have a water separator.
  • the A throttle point 20 can be on the suction side of the feed pump 10 be upstream to limit the through the feed pump 10 drawn fuel quantity.
  • the high pressure pump 14 has, for example, several Pump elements 22, each one in one Have cylinder bore 24 guided pump piston 26, the driven by a drive 28 in one stroke becomes.
  • the pump piston 26 is in the cylinder bore 24 delimits a pump working space 30 into which during the suction stroke the pump piston 26 through a suction valve 32 fuel is sucked in and out of the delivery stroke of the pump piston 26 is displaced by an exhaust valve 34 fuel.
  • the Pressure side of the high pressure pump 14 is via a line 36, to that of the pump work spaces 30 of the pump elements 22 Laxative pressure lines are summarized with a Memory 38 connected. Through the high pressure pump 14 Fuel is pumped into the reservoir 38 under high pressure.
  • each injector 40 For each cylinder of the internal combustion engine is an injector 40 provided by the fuel in the combustion chamber of the Cylinder is injected. Each injector 40 is over one Line 42 connected to the memory 38 and has one Fuel injection valve 44 and a control valve 46.
  • the control valve 46 is controlled by an electronic one Control device 48 controls and determines the opening of the fuel injection valve 44 for Fuel injection.
  • Fuel metering device 50 is arranged which is electrically actuated control valve 52 through which the Flow cross section from the feed pump 10 to High pressure pump 14 is continuously variable between a maximum flow area and a minimum Flow cross-section that is at least approximately zero.
  • the Control valve 52 has an actuator 54, for example in the form of an electromagnet by the control device 48 depending on the operating parameters of the internal combustion engine is controlled such that the suction side of the High pressure pump 14 supplied with a predetermined amount of fuel is and thus a predetermined by the high pressure pump 14 Amount of fuel is fed into the memory 38.
  • a Bypass connection 56 From the connection 49 between the pressure side of the Feed pump 10 and the suction side of the high pressure pump 14 leads upstream of the fuel metering device 50 a Bypass connection 56 from.
  • a Pressure valve 58 arranged through which a connection 60 to Drive 28 of the high pressure pump 14 is controlled.
  • About the Connection 60 becomes fuel for the drive 28 Lubrication supplied.
  • a throttle point 62 Downstream after the pressure valve 58 is in the connection 60 a throttle point 62 is arranged around the Limit fuel flow to drive 28.
  • the bypass connection 56 is parallel to the connection 60 a further connection 64 to the drive 28 is provided in the a further throttle point 66 is arranged.
  • the connection 64 with the throttle point 66 enables ventilation, so that the suction side of the high pressure pump 14 only fuel is supplied and any air present in the drive 28 can escape.
  • connection 70 Downstream after the fuel meter 50 leads from the connection 49 of the pressure side of the feed pump 10 the suction side of the high pressure pump 14 another connection 70 to a relief area that the suction side of the Feed pump 10 can be.
  • connection 70 is one Throttle point 72 arranged. Under certain Operating conditions of the internal combustion engine, especially in Thrust operation, may not by the high pressure pump 14 Fuel are pumped into the memory 38 and thus the suction side of the high pressure pump 14 must not have any fuel are fed. May not be guaranteed be that by the fuel metering 50 Flow cross-section of the connection 49 completely is closed so that there is still fuel to the suction side of the High pressure pump 14 arrives.
  • the connection 70 serves in in this case the fuel from the suction side of the To discharge high pressure pump 14 so that it does not pass through the High pressure pump 14 is sucked. Through the throttle point 72 the outflowing fuel quantity is limited.
  • the pressure in the accumulator 38 is measured by means of a pressure sensor 74 detected, which is connected to the control device 48.
  • the Pressure in the accumulator 38 is through a pressure control valve 76 changeable by which a flow 78 from the memory 38 to a relief area is controlled than at least indirectly the fuel tank 12 can serve.
  • the Drain 78 is in the fuel reservoir 12 opening drain line 79 connected.
  • the pressure control valve 76 is controlled by the control device 48 and can be designed as a 2/2-way valve, for example between an open and a closed position is switchable, or as a proportional valve through which a Flow cross section in the process 78 is changed.
  • a return 80 leads from the injectors 40, through which fuel not injected from injectors 40 and fuel diverted by the control valves 44 into one Discharge area is discharged.
  • From the high pressure pump 14 also leads a return 82 for fuel into one Relief area through which the for lubrication Drive 28 fuel flowing through and optionally escaping due to leakage at the pump elements 22 Fuel is derived.
  • the return 80 of the injectors 40 and the return 82 of the high pressure pump 14 are one common return line 84 summarized in one Inlet 77 or in the outlet 78 of the pressure control valve 76 empties. In the return line 84 is upstream whose mouth into the pressure control valve 76 is a throttle point 86 arranged.
  • the throttle point 86 is in hers Dimensioning for the optimal function of the injectors 40 and the high pressure pump 14 designed.
  • the through that Pressure control valve 76 controlled from the memory 38 The amount of fuel does not flow through the throttle point 86 and thus needs when designing the dimensioning of the Throttle point 86 not to be taken into account.
  • the sequence 78 and drain line 79 can be of a relatively large size Cross-section to be run also a relatively large fuel quantity controlled by the pressure control valve 76 to be able to dissipate without a high back pressure in the Drain line 79 is formed.
  • the embodiment explained can also be dashed as in FIG. 1 shown to be provided that the common Return line 84 to the fuel tank 12 is performed or in the drain line 79 of the Pressure control valve 76 opens.
  • the Pressure control valve 76 is constantly from the Fuel return amount of the injectors 40 and High pressure pump 14 flows through, even if by the Pressure control valve 76 itself has no fuel from the accumulator 38 is shut down, and thereby cooled.
  • FIG 2 is the fuel injector excerpts according to a modified version shown, in which the basic structure is the same as described above for Figure 1.
  • the return 80 of the Injectors 40 and the return 82 of the high pressure pump 14 open into a Y-shaped line piece 88, which also may include throttle 86, and of which the common return line 84 discharges through the Pressure control valve 76 or directly to Fuel tank 24 can be performed.
  • FIG. 3 is the fuel injector excerpts according to another modified Execution shown in which the basic structure is again the same as described above for FIG. 1.
  • the return 80 of the injectors 40 is for High-pressure pump 14 out and there flows into the return 82nd the high pressure pump 14.
  • From the high pressure pump 14 leads common return line 84 to the pressure control valve 76 and opens into its inlet 77.
  • the throttle point 86 is there preferably on the high pressure pump 14, for example in a connector 87 arranged thereon.
  • the training of the Fuel injection device enable a so-called 2-controller concept, in which both by means of Fuel metering device 50 by suction control of the High pressure pump 14 and by means of the pressure control valve 76 the pressure in the accumulator 38 can be regulated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03009123A 2002-04-23 2003-04-22 Dispositif d'injection de carburant pour moteurs à combustion interne Expired - Lifetime EP1361359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10218023 2002-04-23
DE10218023A DE10218023A1 (de) 2002-04-23 2002-04-23 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1361359A1 true EP1361359A1 (fr) 2003-11-12
EP1361359B1 EP1361359B1 (fr) 2005-08-10

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Family Applications (1)

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EP03009123A Expired - Lifetime EP1361359B1 (fr) 2002-04-23 2003-04-22 Dispositif d'injection de carburant pour moteurs à combustion interne

Country Status (2)

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EP (1) EP1361359B1 (fr)
DE (2) DE10218023A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1798409A3 (fr) * 2005-12-14 2007-12-12 Siemens Aktiengesellschaft Système d'injection de carburant pour un moteur à combustion
WO2008025597A1 (fr) * 2006-08-28 2008-03-06 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne à plusieurs cylindres
WO2009024447A1 (fr) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Système d'injection pour un moteur à combustion interne

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9694497B2 (en) 2012-07-10 2017-07-04 Siemens Aktiengesellschaft Robot arrangement and method for controlling a robot
DE102021209819A1 (de) 2021-09-06 2023-03-09 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betrieb einer Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674123A (ja) * 1992-08-26 1994-03-15 Nippondenso Co Ltd コモンレール圧検出装置
JPH09209870A (ja) * 1996-02-05 1997-08-12 Zexel Corp 蓄圧式燃料噴射装置
DE19927804A1 (de) * 1999-06-18 2000-12-28 Bosch Gmbh Robert Kraftstoffversorgungsanlage für eine Brennkraftmaschine
EP1195514A2 (fr) * 2000-10-03 2002-04-10 C.R.F. Società Consortile per Azioni Dispositif pour réguler l'écoulement d'une pompe à haute pression dans un systeme d'injection de carburant à rampe d'alimentation commune d'un moteur à combustion interne
WO2003008795A1 (fr) * 2001-07-10 2003-01-30 Bosch Automotive Systems Corporation Appareil d'injection de combustible a accumulation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674123A (ja) * 1992-08-26 1994-03-15 Nippondenso Co Ltd コモンレール圧検出装置
JPH09209870A (ja) * 1996-02-05 1997-08-12 Zexel Corp 蓄圧式燃料噴射装置
DE19927804A1 (de) * 1999-06-18 2000-12-28 Bosch Gmbh Robert Kraftstoffversorgungsanlage für eine Brennkraftmaschine
EP1195514A2 (fr) * 2000-10-03 2002-04-10 C.R.F. Società Consortile per Azioni Dispositif pour réguler l'écoulement d'une pompe à haute pression dans un systeme d'injection de carburant à rampe d'alimentation commune d'un moteur à combustion interne
WO2003008795A1 (fr) * 2001-07-10 2003-01-30 Bosch Automotive Systems Corporation Appareil d'injection de combustible a accumulation

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 325 (M - 1625) 21 June 1994 (1994-06-21) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 12 25 December 1997 (1997-12-25) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1798409A3 (fr) * 2005-12-14 2007-12-12 Siemens Aktiengesellschaft Système d'injection de carburant pour un moteur à combustion
WO2008025597A1 (fr) * 2006-08-28 2008-03-06 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne à plusieurs cylindres
WO2009024447A1 (fr) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Système d'injection pour un moteur à combustion interne
US8312862B2 (en) 2007-08-23 2012-11-20 Continental Automotive Gmbh Injection system for an internal combustion engine

Also Published As

Publication number Publication date
EP1361359B1 (fr) 2005-08-10
DE50300932D1 (de) 2005-09-15
DE10218023A1 (de) 2003-11-06

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