EP1185785B1 - Systeme d'injection - Google Patents

Systeme d'injection Download PDF

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Publication number
EP1185785B1
EP1185785B1 EP01909459A EP01909459A EP1185785B1 EP 1185785 B1 EP1185785 B1 EP 1185785B1 EP 01909459 A EP01909459 A EP 01909459A EP 01909459 A EP01909459 A EP 01909459A EP 1185785 B1 EP1185785 B1 EP 1185785B1
Authority
EP
European Patent Office
Prior art keywords
injection
fuel
fuel pump
injection system
electronically controlled
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
EP01909459A
Other languages
German (de)
English (en)
Other versions
EP1185785A1 (fr
Inventor
Jaroslaw Hlousek
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 EP1185785A1 publication Critical patent/EP1185785A1/fr
Application granted granted Critical
Publication of EP1185785B1 publication Critical patent/EP1185785B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/022—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • 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
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to an injection system for an internal combustion engine with multiple to be supplied cylinders, according to the preamble of claim 1.
  • Such an injection system can represent a single cylinder system in which the Injection pump is driven for example by a camshaft. at Actuation by a cam becomes the one to be injected in the fuel pump Fuel pressurized and fed to the injector.
  • the start of funding and the delivery end of the fuel pump can, for example, by means of of a slide valve are controlled, which in a first state the delivery chamber connects the pump to a return line so that fuel delivery not done, and in a second state the connection to Return line closes, so that a pressure build-up is possible.
  • the injection pressure is a function of the speed of the camshaft driving the pump.
  • the injection process and a pre-injection can only be performed on the pump side to be influenced. This leads to restrictions regarding the pre-injection quantity and the formation of the injection course as well as unacceptable scatter between the individual cylinders of the internal combustion engine.
  • the object of the invention is a single cylinder injection system to further develop that not only the injection quantity and the start of injection, but also injection pressure, injection process, pre-injection, post-injection and multi-injection can be influenced in the desired manner can.
  • the injection system according to the invention with the features of the claim 1 has the advantage that by suitable actuation of the electronically controlled valve on the injector that supplied by the fuel pump Volume of fuel can be injected in the desired manner, wherein additional parameters for the control of the injection process are provided be independent of the start and end of delivery of the fuel pump are.
  • additional parameters for the control of the injection process are provided be independent of the start and end of delivery of the fuel pump are.
  • the invention Injection system now essentially independent of the delivery rate of the Fuel pump to be injected.
  • the system according to the invention offers greater operational reliability since a possible failure of the fuel pump only due to the modular Structure of the system, the corresponding cylinder of the internal combustion engine is affected.
  • the course of the injection can be varied in the same way can be controlled as is possible with a common raif system.
  • FIG. 1 an injection system according to the invention according to a first embodiment shown. It contains a fuel pump as the most important components 10, an injection nozzle 12 and a connecting line 14 between the fuel pump and the injector.
  • the fuel pump 10 is actuated by a rotating cam 16 and has a pump piston 18 which is adjusted in a pressure chamber 20.
  • the Fuel to be injected is shown schematically by the fuel pump 10 shown fuel supply 22 supplied.
  • a fuel return 24 is provided for return to a fuel tank. That from the fuel supply 22 and a pre-feed pump for the fuel Low pressure system and the unpressurized formed by the fuel return 24 Return systems are not shown in the drawing. Also not in Various leakage returns 26, the fuel return, are shown in detail 24 can be attributed.
  • the fuel pump 10 is provided with a control slide 28, which an electronically controlled actuator 30 is operated with a electronic control unit 32 is connected.
  • the control slide 28 may, depending on instructions from the control unit 32 Control member 30 between an open position in which the pressure chamber 20th the fuel pump with the fuel inlet 22 and the fuel return 24 is connected so that no fuel delivery takes place, and one closed position in which the connection to the Fuel supply and fuel return is closed and one Displacement of the pump piston 18 in the pressure chamber 20 leads to the fact that the Pressure chamber 20 available fuel via the connecting line 14 to Injector 12 is promoted.
  • the injection nozzle 12 which is provided with a storage space 13, has one Nozzle needle 34 on between a closed position in which the provided fuel can not escape from the injector 12. and an open position is displaceable, in which the provided Fuel is injected into the cylinder of the internal combustion engine.
  • the Nozzle needle 34 is supported on a push rod 36 (see FIG. 2), one Control pressure chamber 38 closes on one side.
  • the control pressure chamber 38 is with provided an inlet 40, one as a bore with a small cross section trained inlet throttle 42, and with an outlet 44, the one drain throttle 46 also designed as a bore with a small cross section having.
  • the cross section of the outlet throttle 46 is larger than that Cross section of the inlet throttle 42.
  • the outlet 44 from the control pressure chamber 38 is provided by a valve element 48 controlled by an actuator 50, which is also connected to the control unit 32 is connected between a position closing the drain 44 and a position releasing the drain 44 is adjustable. If that Valve element 48 closes the outlet 44, is in the control pressure chamber 38 Fluid supplied via the inlet 40, typically fuel, is pent up. As a result, a force is exerted on the nozzle needle 34 via the push rod 36 exercised which this against an opening force, which of the Nozzle needle applied fuel pressure is generated in the closed Holds position. On the other hand, if the valve element 48 releases the drain 44, can the fluid accumulated in the control pressure chamber 38 flows out of the latter since the Outlet throttle 46 has a larger cross section than the inlet throttle 46. Thus, no more force is opposed to a displacement of the push rod 36, and the nozzle needle 34 is affected by the fuel pressure acting on it lifted off their valve seat so that the fuel is injected into the cylinder can be.
  • the operation of the injection system described is as follows: The Injection process is initiated with the activation of the actuator 30. This moves the spool 28 into position. in the the connection between pressure chamber and fuel inlet and fuel return closed is. so that the fuel pump delivers. This will remove the pump piston 18 fuel in the connecting line 14 and in the injector 12 compressed.
  • the nozzle needle 34 remains in her as long closed position until the desired pressure level is reached; the time between closing the spool 28 and opening the Nozzle needle 34 thereby defines the available injection pressure.
  • Valve element 48 opened so that the nozzle needle 34 moves away from its valve seat can take off.
  • the current through the actuator 30 is dependent on the angle of rotation the crankshaft of the internal combustion engine to be supplied with fuel shown.
  • the current through the actuator 50 is the Injection nozzle shown depending on the crankshaft rotation angle.
  • Fig. 6c is the stroke of the control slide 28 as a function of the crankshaft rotation angle shown.
  • Fig. 6d the stroke of the valve element 48 is finally dependent represented by the crankshaft rotation angle.
  • valve element 48 take place independently of the control of the control slide 28 can, so that the desired course of injection can be freely selected.
  • FIG. 3 shows an injection system according to a second embodiment. It differs from the injection system shown in FIG. 1 in that that inside the fuel pump 10, a high-pressure collecting space 21 between the pump piston 18 and the control slide 28 is arranged.
  • the High-pressure collecting space 21 acts in the manner of a pressure accumulator, so that one even greater time delay between the start of funding Fuel pump 10 and opening the nozzle needle 34 of the injector 12 is possible.
  • valve spool 52 is used, so that a 3/2-way valve is formed.
  • An inlet throttle 42 and an outlet throttle 46 are also provided here, with the opening of the valve slide 52 the inlet to the nozzle needle 34 is opened.

Landscapes

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

Abstract

L'invention concerne un système d'injection pour un moteur à combustion interne, comportant une pompe à carburant (10) commandée électroniquement, pour chaque cylindre à alimenter du moteur à combustion interne, un injecteur (12) pourvu d'un pointeau (34), et une conduite de raccordement (14) entre la pompe à carburant et l'injecteur. L'invention vise à permettre de sélectionner librement le déroulement de l'injection. A cet effet, l'injecteur est pourvu d'une soupape commandée électroniquement (48, 50 ; 50, 52) qui peut commander l'ouverture du pointeau (34).

Claims (4)

  1. Système d'injection pour un moteur à combustion interne avec plusieurs cylindres à alimenter,
    le système d'injection comprenant une unité de commande électronique (32) et pour chacun des cylindres :
    une pompe à combustible (10),
    un injecteur (12) muni d'une aiguille d'injection (34) et d'une soupape (48, 50 ; 50, 52) à commande électronique pouvant commander l'ouverture de l'aiguille d'injection (34),
    une conduite de liaison (14) entre la pompe à combustible (10) et l'injecteur (12),
    aussi bien chacune des pompes à carburant (10) que chacune des soupapes (48, 50 ; 50, 52) à commande électronique étant reliées à l'unité de commande électronique (32) et commandées par celle-ci,
    caractérisé en ce que
    chaque injecteur (12) est muni d'une chambre d'accumulation (13) qui est en liaison d'écoulement aussi bien avec la conduite de liaison (14) qu'avec l'aiguille d'injecteur (34) et dans laquelle un fluide peut être accumulé au moyen de la soupape (48, 50 ; 50, 52) à commande électronique, de telle sorte que la pression alors effective maintient l'aiguille d'injection (34) dans sa position fermée.
  2. Système d'injection selon la revendication 1,
    caractérisé en ce que
    chaque pompe à combustible (10) est munie d'un tiroir de commande (28) à commande électronique.
  3. Système d'injection selon l'une quelconque des revendications 1 et 2,
    caractérisé en ce que
    chaque pompe à combustible (10) est munie d'une chambre haute pression (21).
  4. Système d'injection selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    chaque soupape à commande électronique est une soupape à 3/2 orifices munie d'un tiroir de soupape (52).
EP01909459A 2000-01-19 2001-01-13 Systeme d'injection Expired - Lifetime EP1185785B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10002109 2000-01-19
DE10002109A DE10002109A1 (de) 2000-01-19 2000-01-19 Einspritzsystem
PCT/DE2001/000119 WO2001053691A1 (fr) 2000-01-19 2001-01-13 Systeme d'injection

Publications (2)

Publication Number Publication Date
EP1185785A1 EP1185785A1 (fr) 2002-03-13
EP1185785B1 true EP1185785B1 (fr) 2004-10-06

Family

ID=7628002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909459A Expired - Lifetime EP1185785B1 (fr) 2000-01-19 2001-01-13 Systeme d'injection

Country Status (8)

Country Link
US (1) US6626149B2 (fr)
EP (1) EP1185785B1 (fr)
JP (1) JP4571771B2 (fr)
KR (1) KR100714855B1 (fr)
BR (1) BR0104086B1 (fr)
DE (2) DE10002109A1 (fr)
RU (1) RU2273764C2 (fr)
WO (1) WO2001053691A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10143423A1 (de) * 2001-09-05 2003-05-08 Bosch Gmbh Robert Kraftstoffeinspritzsystem mit hydraulisch von der Zuleitung entkoppeltem Injektor
FR2836701B1 (fr) * 2002-03-01 2006-12-22 Renault Dispositif de montage d'un tuyau d'injection de carburant
EP1359316B1 (fr) * 2002-05-03 2007-04-18 Delphi Technologies, Inc. Système d'injection de carburant
EP1498600A1 (fr) * 2003-07-18 2005-01-19 Delphi Technologies, Inc. Système de carburant de type Common-Rail
DE102004032181A1 (de) * 2004-07-02 2006-01-19 Robert Bosch Gmbh Kraftstoffeinspritzventil
ITMI20080246A1 (it) * 2008-02-15 2009-08-16 Bosch Gmbh Robert Pompa di alta pressione e impianto di alimentazione di combustibile comprendente tale pompa di alta pressione
DE102008002527A1 (de) * 2008-06-19 2009-12-24 Robert Bosch Gmbh Kraftstoff-Injektor
US9506417B2 (en) * 2014-04-17 2016-11-29 Ford Global Technologies, Llc Methods for detecting high pressure pump bore wear
GB2618549A (en) * 2022-05-09 2023-11-15 Clean Air Power Gt Ltd Modular fuel injector

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Publication number Priority date Publication date Assignee Title
GB2289313B (en) * 1994-05-13 1998-09-30 Caterpillar Inc Fluid injector system
US5535723A (en) * 1994-07-29 1996-07-16 Caterpillar Inc. Electonically-controlled fluid injector having pre-injection pressurizable fluid storage chamber and outwardly-opening direct-operated check
US5463996A (en) * 1994-07-29 1995-11-07 Caterpillar Inc. Hydraulically-actuated fluid injector having pre-injection pressurizable fluid storage chamber and direct-operated check
US5687693A (en) * 1994-07-29 1997-11-18 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
DE4445586A1 (de) 1994-12-20 1996-06-27 Bosch Gmbh Robert Verfahren zur Reduzierung des Kraftstoffdruckes in einer Kraftstoffeinspritzeinrichtung
JPH0932682A (ja) 1995-07-14 1997-02-04 Isuzu Motors Ltd 内燃機関の燃料噴射装置
US5749717A (en) * 1995-09-12 1998-05-12 Deisel Technology Company Electromagnetic fuel pump for a common rail fuel injection system
DE19535368C2 (de) * 1995-09-25 1998-04-30 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
US5992359A (en) * 1996-06-13 1999-11-30 Rose; Nigel Eric Fluid actuated engines and engine mechanisms
GB2325024B (en) * 1996-07-25 1999-10-13 Cummins Engine Co Inc A fuel injection system and a unit fuel injector
US5819704A (en) * 1996-07-25 1998-10-13 Cummins Engine Company, Inc. Needle controlled fuel system with cyclic pressure generation
US5676114A (en) * 1996-07-25 1997-10-14 Cummins Engine Company, Inc. Needle controlled fuel system with cyclic pressure generation
DE19701879A1 (de) 1997-01-21 1998-07-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19742320A1 (de) * 1997-09-25 1999-04-01 Bosch Gmbh Robert Kraftstoffeinspritzventil
GB9810327D0 (en) 1998-05-15 1998-07-15 Lucas Ind Plc Fuel system and pump suitable for use therein

Also Published As

Publication number Publication date
JP2003520327A (ja) 2003-07-02
KR20010113745A (ko) 2001-12-28
US6626149B2 (en) 2003-09-30
DE50103958D1 (de) 2004-11-11
KR100714855B1 (ko) 2007-05-08
US20020134358A1 (en) 2002-09-26
RU2273764C2 (ru) 2006-04-10
WO2001053691A1 (fr) 2001-07-26
JP4571771B2 (ja) 2010-10-27
BR0104086B1 (pt) 2009-05-05
DE10002109A1 (de) 2001-08-02
BR0104086A (pt) 2001-12-26
EP1185785A1 (fr) 2002-03-13

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