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EP1045975B1 - Unite servant a commander l'etablissement de la pression dans une unite de pompage - Google Patents

Unite servant a commander l'etablissement de la pression dans une unite de pompage Download PDF

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Publication number
EP1045975B1
EP1045975B1 EP99952396A EP99952396A EP1045975B1 EP 1045975 B1 EP1045975 B1 EP 1045975B1 EP 99952396 A EP99952396 A EP 99952396A EP 99952396 A EP99952396 A EP 99952396A EP 1045975 B1 EP1045975 B1 EP 1045975B1
Authority
EP
European Patent Office
Prior art keywords
valve
control valve
valve body
control
small
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
EP99952396A
Other languages
German (de)
English (en)
Other versions
EP1045975A1 (fr
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 EP1045975A1 publication Critical patent/EP1045975A1/fr
Application granted granted Critical
Publication of EP1045975B1 publication Critical patent/EP1045975B1/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
    • 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
    • F02M59/46—Valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially
    • 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
    • F02M45/06—Pumps peculiar thereto
    • 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
    • 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
    • F04B49/225—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 with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/17—Opening width of a throttling device
    • F04B2205/172—Opening width of a throttling device after the pump outlet

Definitions

  • the present invention relates to a control unit for Control of pressure build-up by a pump unit in a system, the control unit being a control valve and a valve actuation unit connected to it has and the control valve as a in the flow direction inward-opening I-valve is formed, the one in a housing of the control unit axially displaceable has mounted valve body, which when closed Control valve from the inside on a valve seat of the Control valve sits.
  • the control unit has one Throttle arrangement through which the flow through the Control valve when opened by a small stroke Control valve is throttled.
  • the present invention also relates to a Injection system for supplying fuel to one Combustion chamber of direct injection Internal combustion engines with a pump unit for Build up an injection pressure and then to inject the Fuel through an injector in the Combustion chamber.
  • the present invention also relates to a Method for controlling the pressure build-up by means of a Control unit with a control valve and one with this connected valve actuation unit, the Control valve as an inward flow direction opening I-valve is formed, the one in one Housing of the control unit mounted axially displaceable Has valve body, when the control valve is closed from the inside sits on a valve seat of the control valve.
  • Control units are known from the prior art. She are used, for example, to control the fuel supply in a combustion chamber of direct injection Internal combustion engines used.
  • the Internal combustion engines have a pump unit Build up an injection pressure and then to inject the Fuel through an injection nozzle into the combustion chamber on.
  • the injection system of the internal combustion engine can For example, as a pump-nozzle unit (PDE) or as a pump-line nozzle (PLD) system.
  • Solenoid valves These known control units are usually called Solenoid valves designed.
  • Valve actuation unit designed as an electromagnet, which actuates the control valve.
  • the solenoid valve is in the open state. This is a free one Flow from the pump unit to the low pressure area given the injection system and thus filling the Pump room with fuel during the suction stroke of the Pump piston and a backflow of fuel during of the delivery stroke possible.
  • a control of the solenoid valve during the delivery stroke of the pump piston closes it Bypass. This leads to a pressure build-up in the High pressure area of the system.
  • Control unit of the pressure build-up in the pump unit to be controlled.
  • the control valve is downstream as one in the flow direction internally opening I-valve.
  • I valves have small strokes are usually very steep Flow curve. The course is in a flow curve the flow through a valve depending on the Stroke of the valve applied. Because of the steep course the flow curve of I-valves with small valve strokes already lead to slight fluctuations in the valve lift relatively large fluctuations in the flow rate. Basically, a fluctuation in the flow rate would have small strokes hardly affect the total amount of funded medium.
  • the flow rate through the valve at small Valve strokes should be as independent of the valve stroke as possible should and where it should be as flat as possible the flow curve arrives at small strokes.
  • Such an application is, for example, the control of the Direct injection fuel supply Internal combustion engines.
  • Pre-injection performed, d. H. before the actual Main injection a small amount of fuel into the Injection chamber injected.
  • the Amount of pre-injected fuel needs to be accurately determined can be the behavior of the To be able to control the internal combustion engine in a targeted manner.
  • the Pre-injection takes place with small strokes of the control valve instead of. Already have slight fluctuations in the valve lift large in the prior art control unit Effects on the amount of pre-injected Fuel. To the pre-injection quantity as accurately as possible To be able to determine, it would therefore be advantageous if the Flow curve with small strokes a flat course having.
  • a control unit is known from US 4,470,548 of the type mentioned, in which the Flow rate through a mechanical throttle arrangement is throttled.
  • the flow rate is there through the control unit through a cross section of a Expiration of a housing of the control unit throttled.
  • the invention is based on from a control unit of the type mentioned Control unit in front by a throttle arrangement is characterized by the flow through the Control valve when opened by a small stroke Control valve is throttled.
  • control valve open by a large stroke control unit is a free flow from the pump unit via the valve seat of the control valve to a low pressure area of a system in which the Pressure build-up to be controlled is given. So is a Filling the pump room with the pumped medium during the suction stroke of the pump piston and a backflow of the medium possible during the delivery stroke. In the system so no pressure is built up.
  • valve actuation unit moves the valve piston in the direction of the closed position of the Control valve. This allows the control valve to turn around a small stroke open valve position.
  • the control valve is opened by a small stroke, after as before a flow, but only one throttled flow, from the pump unit through the Valve seat of the control valve and via the throttle arrangement given to the low pressure area of the system. So is conditional filling of the pump room with the pumped Medium during the suction stroke of the pump piston and a Backflow of the medium possible during the delivery stroke. In the high pressure area of the system becomes a low pressure built up.
  • valve actuation unit Another actuation of the valve actuation unit during of the delivery stroke of the pump piston closes the control valve completely, causing the bypass from the pump unit to the low pressure area of the system is interrupted. This leads to the build-up of high pressure in the high pressure area of the system.
  • the flow rate of the flow through the control valve Medium does not fall off steeply during the closing process a maximum value when the control valve is fully open to zero when fully closed Control valve. Rather, when one reaches small hubs so long an almost constant small amount of the pumped medium through the control valve until the Control valve is completely closed.
  • the course of the Flow curve of the control valve for small strokes is in advantageously very flat. This ensures that Fluctuations in valve lift hardly fluctuations in Cause flow rate.
  • the flow rate is at small strokes almost independent of the valve stroke.
  • the throttle arrangement is integrated in the valve body. This has the advantage that it is not controlled separately must, but together with the valve body an inactive position when fully open Control valve in an active position at around a small Stroke open control valve can be brought.
  • the small strokes of the Control valve is in a closed position and the has at least one throttle bore, which when open Control valve with an inlet and an outlet of the Control valve is connected.
  • the further valve body is preferably in the Valve body is axially displaceable.
  • the other The valve body sits with the control valve closed and at a small stroke of the control valve in the direction of flow from the inside on another valve seat of the control valve.
  • the conveyed medium can through the valve seat and additional valve seat free from the pump unit to the Low pressure area of the system flow.
  • valve body of the control valve still from that Lifted valve seat, the further valve body of the Throttle arrangement, however, sits on the other Valve seat.
  • the pumped medium can only be throttled through the valve seat and the throttle bore further Valve body flow. Doing so will result in the system low pressure built up.
  • Control valve sits on the valve body of the control valve the valve seat and the pumped medium is on the Valve seat retained. Now one in the system higher pressure built up.
  • the further valve body is advantageously replaced by a between the valve body and the further valve body acting spring element with closed control valve or with a small stroke of the control valve on the other Valve seat pressed.
  • the further valve body preferably has a stop on the with a large stroke of the control valve on the Valve body rests. With the control valve closed corresponds to the distance between the stop and the Valve body the size of the small valve lift during which the throttle arrangement is active.
  • the invention proposes that the further Valve body in the flow direction on the outside of the valve body is formed and that the further valve body at closed control valve and with a small stroke of the Control valve sealed in a mounting hole is included from which the drain from the control valve out leads.
  • the further valve body and the Location bore form the further valve seat, which during the small strokes of the control valve are closed.
  • at fully open control valve d. H. with a big one Stroke, is the valve body of the control valve from which Lifted valve seat and the further valve body of the Throttle assembly is outside of the Bore.
  • the funded medium can through the Valve seat and the other valve seat free from the Pump unit to the low pressure area of the system flow.
  • valve body of the control valve still lifted from the valve seat, the other Valve body of the throttle arrangement is, however, of the Location bore sealed sealed.
  • the funded Medium can only be throttled through the valve seat and the throttle bore of the further valve body flow. This creates a low pressure in the system.
  • the Valve body of the control valve on the valve seat and that conveyed medium is retained on the valve seat. In a higher pressure is now built up in the system.
  • the present invention also relates to a Injection system for supplying fuel to one Combustion chamber of direct injection Internal combustion engines with a pump unit for Build up an injection pressure and then to inject the Fuel through an injector in the Combustion chamber, the injection system means has to before the actual main injection small amount of fuel in the combustion chamber voreinzuspritzen.
  • the present invention also relates to a Method for controlling the pressure build-up by a Pump unit in a system by means of a control unit, which is a control valve and one connected to it Has valve actuation unit, wherein the control valve as an I-valve opening inwards in the direction of flow is formed, the one in a housing Control unit axially displaceably mounted valve body has from the inside when the control valve is closed a valve seat of the control valve sits, and wherein to Building up a pressure in the system of the valve body Control valve from an open by a large stroke Position over a position opened by a small stroke is brought into a closed position.
  • the invention proposes that the flow through the Control valve from the time the valve body is open to a small stroke, up to the point of time which the valve body is closed by a in the Valve body integrated throttle assembly is throttled.
  • the method for controlling the Fuel supply into a combustion chamber direct-injection internal combustion engine with a Pump unit for building up an injection pressure and after for injecting fuel through an injector used the combustion chamber.
  • Advantages of the invention to bear. So it is with that inventive method possible Fuel quantity of a pre-injection is particularly accurate and to control reliably because the flow rate through the Control valve due to the flat course of the Flow curve is almost independent of the valve lift of the Control valve. With fluctuating small strokes it is Flow rate therefore only a small fluctuation subjected.
  • FIG. 1 is a control valve 1 of an inventive Control unit according to a first embodiment shown.
  • the control unit is used to control the Pressure build-up by a pump unit in any System. It has the control valve 1 and one with it connected valve actuation unit (not shown) on.
  • the control valve 1 is in the direction of flow 14 inward opening I-valve. It has one axially displaceable in a housing 2 of the control unit mounted valve body 3, the closed Control valve 1 from the inside on a valve seat 4 of the Control valve 1 sits.
  • the control valve 1 has one Throttle arrangement 5 through which the flow through the Control valve 1 when opened by a small stroke Control valve 1 is throttled.
  • the throttle arrangement 5 is in the valve body 3 Integrated further valve body 6 formed.
  • the further valve body 6 is in the direction of flow arranged on the outside of the valve body 3.
  • the other Valve body 6 is at a small stroke of the control valve 1 in a closed position and has two throttle bores 7 which, when the control valve 1 is open, has an inlet 8 and an outlet 9 of the control valve 1 in connection stand.
  • the further valve body 6 is in the valve body 3 axially slidably mounted. The further valve body 6 sits with control valve 1 closed and one small stroke of the control valve 1 from the inside on one further valve seat 10 of the control valve 1.
  • valve seat 4 With control valve 1 open by a large stroke both the valve seat 4 and the further valve seat 10 open. There is free flow from the pump unit given to a low pressure area of the system, and thus is filling the pump room with the pumped medium during the suction stroke of the pump piston and a backflow of the medium possible during the delivery stroke. In the system no pressure is built up.
  • the further valve body 10 is by a between the Valve body 3 and the further valve body 6 acting Spring element 11 with closed control valve 1 or at a small stroke of the control valve 1 on the other Valve seat 10 pressed.
  • the further valve body 6 has a stop 12 on the at a large stroke of Control valve 1 rests on the valve body 3.
  • the further valve seat 10 is particularly flat, so with large strokes of the control valve 1 after opening of the further valve seat 10 as quickly as possible Flow value Q (see. Fig. 3) is reached.
  • FIG 2 is a control valve 1 of the invention Control unit according to a second embodiment shown.
  • the other one Valve body 6 in the flow direction on the outside Valve body 3 formed.
  • the further valve body 6 is with control valve 1 closed and with a small stroke of the control valve 1 sealed in a receiving bore 13 added.
  • the drain 9 leads out of the receiving bore 13 out of the control valve 1.
  • the further valve body 6 forms together with the edge of the receiving bore 13 another valve seat 10.

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

Claims (9)

  1. °) Unité de commande pour commander la montée en pression dans le système d'un ensemble pompe, l'unité de commande présentant une soupape de commande (1) et une unité de commande raccordée à celle-ci, la soupape de commande (1) étant formée comme une soupape en I s'ouvrant vers l'intérieur dans le sens d'écoulement et présentant un corps de soupape (3) installé de manière axialement déplaçable dans un boítier (2) de l'unité de commande, reposant sur le siège de soupape (4) de la soupape de commande (1) lorsque la soupape de commande (1) est fermée de l'intérieur, cette unité de commande présentant un dispositif d'étranglement (7) par lequel l'écoulement par la soupape de commande (1) est étranglé lorsque la soupape de commande (1) est ouverte d'une petite course (hklein),
    caractérisée en ce que
    le dispositif d'étranglement (7) est intégré dans le corps de soupape (3).
  2. Unité de commande selon la revendication 1,
    caractérisée en ce qu'
    un corps de soupape supplémentaire (6), situé à l'extérieur dans le sens d'écoulement, est disposé sur le corps de soupape (3), en position fermée en cas de petite course (hklein) de la soupape de commande (1), et qui présente au moins un alésage d'étranglement (7) en liaison avec une arrivée (8) et une évacuation (9) de la soupape de commande (1) lorsque la soupape de commande (1) est ouverte.
  3. Unité de commande selon la revendication 2,
    caractérisée en ce que
    le corps de soupape supplémentaire (6) est installé de manière axialement déplaçable dans le corps de soupape (3) et le corps de soupape supplémentaire (6) repose sur un siège de soupape supplémentaire (10) de la soupape de commande (1) lorsque la soupape de commande (1) est fermée de l'intérieur en cas de petite course (hklein) de la soupape de commande (1) dans le sens d'écoulement.
  4. Unité de commande selon la revendication 3,
    caractérisée en ce que
    le corps de soupape supplémentaire (6) est pressé sur le siège de soupape (10) supplémentaire par un élément de ressort (11) agissant entre le corps de soupape (3) et le corps de soupape supplémentaire (6) lorsque la soupape de commande (1) est fermée ou en cas de petite course (hklein) de la soupape de commande (1).
  5. Unité de commande selon la revendication 4,
    caractérisée en ce que
    le corps de soupape supplémentaire (6) présente une butée (12) qui repose sur le corps de soupape (3) en cas de grande course (h > hklein) de la soupape de commande (1).
  6. Unité de commande selon la revendication 2,
    caractérisée en ce que
    le corps de soupape supplémentaire (6) est formé sur le corps de soupape (3) à l'extérieur dans le sens d'écoulement, et le corps de soupape supplémentaire (6) est logé de manière étanche dans un alésage de positionnement (13) lorsque la soupape de commande (1) est fermée et en cas de petite course (hklein) de la soupape de commande (1), duquel alésage sort le flux (9) de la soupape de commande (1).
  7. Système à injection pour amener du carburant dans une chambre de combustion de moteurs à combustion interne à injection directe avec un ensemble pompe pour la montée en pression d'une pression d'injection puis pour injecter le carburant à l'aide d'un gicleur dans la chambre de combustion, le système à injection présentant des moyens pour préinjecter une petite quantité de carburant dans la chambre de combustion avant l'injection principale proprement dite,
    caractérisé en ce que
    le système à injection présente une unité de commande selon l'une quelconque des revendications 1 à 6.
  8. Méthode de commande de la montée en pression dans le système d' un ensemble pompe au moyen d'une unité de commande qui présente une soupape de commande (1) et une unité de commande de soupape raccordée à celle-ci, la soupape de commande (1) étant formée comme une soupape en I s'ouvrant vers l'intérieur dans le sens d'écoulement, et présentant un corps de soupape (3) installé de manière axialement déplaçable dans un boítier (2) de l'unité de commande, reposant sur un siège de soupape (4) de la soupape de commande (1) lorsque la soupape de commande (1) est fermée de l'intérieur, et le corps de soupape (3) de la soupape de commande (1) étant, pour la montée en pression dans le système, amené d'une position ouverte en cas de grande course à une position fermée, en passant par une position ouverte en cas de petite course,
    caractérisée en ce que
    l'écoulement par la soupape de commande (1), depuis le moment où le corps de soupape (3) est ouvert en cas de petite course (hklein) jusqu'au moment où le corps de soupape (3) est fermé, est étranglé par un dispositif d'étranglement (7) intégré dans le corps de soupape (3).
  9. Méthode selon la revendication 8,
    caractérisée en ce que
    la méthode est utilisée pour amener du carburant dans une chambre de combustion de moteurs à combustion interne à injection directe avec un ensemble pompe pour la montée en pression d'une pression d'injection puis pour injecter le carburant à l'aide d'un gicleur dans la chambre de combustion.
EP99952396A 1998-08-18 1999-08-17 Unite servant a commander l'etablissement de la pression dans une unite de pompage Expired - Lifetime EP1045975B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19837332A DE19837332A1 (de) 1998-08-18 1998-08-18 Steuereinheit zur Steuerung des Druckaufbaus in einer Pumpeneinheit
DE19837332 1998-08-18
PCT/DE1999/002544 WO2000011339A1 (fr) 1998-08-18 1999-08-17 Unite servant a commander l'etablissement de la pression dans une unite de pompage

Publications (2)

Publication Number Publication Date
EP1045975A1 EP1045975A1 (fr) 2000-10-25
EP1045975B1 true EP1045975B1 (fr) 2004-05-19

Family

ID=7877840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99952396A Expired - Lifetime EP1045975B1 (fr) 1998-08-18 1999-08-17 Unite servant a commander l'etablissement de la pression dans une unite de pompage

Country Status (6)

Country Link
US (1) US6425539B1 (fr)
EP (1) EP1045975B1 (fr)
JP (1) JP2002523670A (fr)
KR (1) KR20010031172A (fr)
DE (2) DE19837332A1 (fr)
WO (1) WO2000011339A1 (fr)

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US6390069B1 (en) * 2001-01-26 2002-05-21 Detroit Diesel Corporation Fuel injector assembly and internal combustion engine including same
EP1236885B1 (fr) * 2001-02-28 2005-03-30 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
US7210640B2 (en) * 2001-11-30 2007-05-01 Caterpillar Inc Fuel injector spray alteration through a moveable tip sleeve
DE10209527A1 (de) * 2002-03-04 2003-09-25 Bosch Gmbh Robert Einrichtung zur druckmodulierten Formung des Einspritzverlaufes
DE10210282A1 (de) * 2002-03-08 2003-09-25 Bosch Gmbh Robert Vorrichtung zum Einspritzen von Kraftstoff an stationären Verbrennungskraftmaschinen
DE102004022268A1 (de) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Ansteuerverfahren zur Beeinflussung der Öffnungsgeschwindigkeit eines Steuerventiles an einem Kraftstoffinjektor

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DE4142940C2 (de) * 1991-12-24 1994-01-27 Bosch Gmbh Robert Elektrisch gesteuerte Pumpedüse
DE4238727C2 (de) * 1992-11-17 2001-09-20 Bosch Gmbh Robert Magnetventil
US5301714A (en) * 1993-03-01 1994-04-12 Johnson Keith E Multi-position valve apparatus having a return port
SE507374C3 (sv) * 1996-09-10 1998-06-29 Volvo Lastvagnar Ab Saett och anordning foer reglering av insprutningstrycket av flytande braensle

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DE19837332A1 (de) 2000-02-24
JP2002523670A (ja) 2002-07-30
EP1045975A1 (fr) 2000-10-25
KR20010031172A (ko) 2001-04-16
US6425539B1 (en) 2002-07-30
WO2000011339A1 (fr) 2000-03-02
DE59909524D1 (de) 2004-06-24

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