EP1552136B1 - Dispositif d'injection de carburant destine a un moteur a combustion interne - Google Patents

Dispositif d'injection de carburant destine a un moteur a combustion interne Download PDF

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Publication number
EP1552136B1
EP1552136B1 EP03740027A EP03740027A EP1552136B1 EP 1552136 B1 EP1552136 B1 EP 1552136B1 EP 03740027 A EP03740027 A EP 03740027A EP 03740027 A EP03740027 A EP 03740027A EP 1552136 B1 EP1552136 B1 EP 1552136B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
valve element
injection device
pressure
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
EP03740027A
Other languages
German (de)
English (en)
Other versions
EP1552136A1 (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 EP1552136A1 publication Critical patent/EP1552136A1/fr
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Publication of EP1552136B1 publication Critical patent/EP1552136B1/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
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • 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
    • F02M63/0005—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 valves actuated by fluid 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
    • 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
    • F02M63/0012—Valves
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0061—Single actuator acting on two or more valve bodies
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention relates to a fuel injection device for an internal combustion engine, comprising a housing, with a recess provided in the housing, with at least two in the recess coaxially arranged valve elements, which cooperate with a respective valve seat and which each have at least one corresponding fuel outlet opening assigned.
  • Such a fuel injection device is known from DE 40 23 223 A1.
  • a fuel injection nozzle for internal combustion engines is shown.
  • Two valve pins are arranged coaxially with each other. Both valve needles each have a pressure surface.
  • the pressure surfaces of the valve needles each delimit a pressure chamber, which is in each case connected to a flow channel, through which the fuel pressure space can flow.
  • the pressure surfaces are aligned so that at a Pressing the valve needles in each case lift off from their assigned seat and thereby release corresponding outlet openings at the end of the injector.
  • the valve needles can be controlled independently of each other via the two independent flow channels.
  • EP 1 069 308 A2 further describes a fuel injection device with two valve elements, which are both stroke-controlled and independently operable by a common valve device.
  • WO 02/42637 A1 discloses a fuel injection device with a lifting and a pressure-controlled valve element.
  • Object of the present invention is to develop a fuel injection device for an internal combustion engine of the type mentioned so that it is as simple and compact builds.
  • the fuel injection device according to the invention requires for operation only a common valve device with which all valve elements can be controlled at least indirectly. It therefore builds comparatively compact. Furthermore, since a comparatively small number of parts is required, their manufacture is also inexpensive. Due to the fact that the common valve device provided according to the invention has three switching positions, high flexibility is achieved Operation of the fuel injection device according to the invention possible.
  • the fuel injection device therefore, on the one hand, is compact and, on the other hand, enables an emission and consumption-optimized operation of the internal combustion engine.
  • a flow restrictor is arranged in the flow path between the control chamber of the hydraulically switchable valve device and the common valve device.
  • valve element pressure-controlled and the other valve element work stroke-controlled.
  • the respective advantages of pressure-controlled or stroke-controlled valve elements can be combined in a single fuel injection device.
  • a pressure-controlled valve element in particular in a partial load operation of the internal combustion engine, has a particularly favorable injection characteristic.
  • the control of the pressure-controlled valve element is simplified in that the pressure-controlled valve element is arranged radially outwardly of the stroke-controlled valve element.
  • control chamber of the pressure-controlled valve element is connected to the hydraulically switchable valve device.
  • a fuel system as a whole bears the reference numeral 10. It comprises a fuel tank 12, from which an electric fuel pump 14 conveys the fuel into a low-pressure fuel line 16.
  • the low-pressure fuel line 16 leads to a high-pressure fuel pump 18.
  • This is a piston pump which is driven by a camshaft (not shown) of the internal combustion engine to which the fuel system 10 belongs.
  • the high-pressure fuel pump 18 delivers into a fuel rail 20 ("rail") in which the fuel is stored under high pressure.
  • a plurality of injectors 22 are connected, which inject the fuel directly into them associated combustion chambers 24 of the internal combustion engine.
  • the operation of the internal combustion engine and the fuel system 10 is controlled and regulated by a control and regulating device 26.
  • the injectors 22 are controlled by the control and regulating device 26. From the injectors 22 in each case a line 28 leads back to the fuel tank 12th
  • FIG. 2 An area of one of the injectors 22 is shown in detail in FIG. 2:
  • the injector 22 comprises a two-part housing with an upper part 30 and a lower part 32.
  • the housing 30, 32 has a recess 34, in which inter alia a first elongated valve element 36 is present. Its lower end in FIG. 2 is conically tapered and cooperates with a valve seat 38 (cf., FIG. 3) in the lower part 32 of the housing.
  • a second valve element 40 Coaxial to the first Valve element 36 and radially outside of this, a second valve element 40 is provided, the conical tip also cooperates with a valve seat 42 in the lower part 32 of the housing.
  • the first valve element 36 is acted upon by a compression spring 44, one end of which is supported on a shoulder (without reference numeral) in the upper part 30 of the housing, in the direction of the valve seat 38.
  • the second valve element 40 is acted upon by a compression spring 46 in the direction of the corresponding valve seat 42 out.
  • the compression spring 46 is not supported directly on a shoulder in the recess 34 in the upper part 30 of the housing, but on an intermediate ring 48th
  • the recess 34 in the lower part 32 of the housing comprises a blind hole 50, from which a plurality of outlet openings 52 leads to the outside. Through these outlet openings 52 of the fuel, as will be explained below in more detail, with open first valve element 36 and 40 open second valve element. Outlet openings 54 serve analogously to the outlet of the fuel when only the second valve element 40 is lifted from the second valve seat 42. Again, this will be more detailed below.
  • a common valve device 56 is provided, which is arranged in the upper region of the upper part 34 of the housing. This comprises a hemispherically shaped valve element 58, which is arranged in a switching chamber 60. Via a plunger 62, the valve element 60 of a piezoelectric actuator 64 shown only symbolically in various switch positions are adjusted.
  • valve element 58 In the rest position, the valve element 58 is pressed by a compression spring 66 against a valve seat 68. When the valve element 58 bears against the valve seat 68, the connection from the switching chamber 60 via a channel 70 to a low-pressure connection 72 (see also FIG. The low-pressure port 72 is in turn connected to the return line 28, which leads back to the fuel tank 12.
  • a channel 74 leads to a control chamber 76.
  • the upper end of the first valve element 36 with a pressure surface 78 also opens into the control chamber 76.
  • a flow throttle 80 is present in the channel 74. From the radial boundary wall (without reference numeral) of the switching chamber 60 performs a fluid connection (without reference numeral) via a flow restrictor 82 to a control chamber 84 of a hydraulically actuated switching valve 86th
  • the hydraulically actuable switching valve 86 also includes a switching chamber 88, in which a valve element 90 is arranged.
  • the valve element 90 is generally cylindrical with a switching portion 92 having a circular cylindrical diameter, a transition portion 94 which is formed as a constriction, and a circular cylindrical guide portion 96.
  • One end of a compression spring 98 is supported on a closure member 100 from. The other end of the compression spring 98 acts on the valve element 90 in the direction of the control chamber 84.
  • annular groove 102 is present in the peripheral wall of the switching chamber 88. This is connected on the one hand via a channel 104 with a high-pressure port 106 (see also Figure 1). This in turn leads to the fuel manifold 20. On the other hand, a channel 108 via a flow restrictor 110 from the annular groove 102 to the control chamber 76, with which the movement of the first valve element 36 is controlled. From that portion of the peripheral wall of the switching chamber 88, which is approximately in the region of the constricted transition portion 94 of the valve element 90, a channel 112 leads to an annular space 114 in the lower region of the second valve element 40th
  • the circumferential wall of the switching chamber 88 forms a valve seat 116 for a switching edge 118 of the valve element 90.
  • the switching edge 118 is formed between the switching section 92 and the transition section 94.
  • a further channel 120 In the switching portion 92 of the valve member 90 extends obliquely to the longitudinal axis of the valve element 90, a further channel 120. This includes a flow restrictor 122, and it connects the annular groove 102 with the control chamber 84. Also to mention is still a leakage channel 124, of the recess 34 in Upper part 30 of the housing leads to a leakage connection 126.
  • the injector 22 shown in Figures 1 to 3 operates as follows:
  • the valve element 38 of the common valve device 56 bears against the upper valve seat 68 in FIG.
  • the switching chamber 60 of the common valve device 56 in the control chamber 76 of the first valve element 36, and in the control chamber 84 of the hydraulically operated switching valve 86 is thus the on High pressure port 106 present high pressure.
  • the valve element 92 of the hydraulically actuated switching valve 86 is pressed with the switching edge 118 against the valve seat 116. That region of the switching chamber 88 which lies at the level of the transition section 94 is thus separated from the high-pressure port 106. Therefore, there is a comparatively low pressure in him.
  • the second valve element 40 can therefore be pressed by the spring 46 against the valve seat 42.
  • valve element 58 of the common valve device 56 can be brought by the actuator 64 via the plunger 62 in a second switching position in which it rests against the lower boundary wall of the switching chamber 60 in FIG.
  • the switching chamber 60 is now connected via the channel 70 to the low pressure port 72.
  • the high pressure can escape from the control chamber 84 of the hydraulically actuatable switching valve 86 via the flow throttle 82.
  • the valve element 90 of the hydraulically actuatable switching valve 86 is now moved in the direction of the control chamber 84, so that the switching edge 118 lifts from the valve seat 116.
  • the fuel present under high pressure in the annular groove 102 can now flow via the channel 112 into the annular space 114.
  • the high fuel pressure which also rests on the high-pressure port 106.
  • the second valve element 40 is moved against the action of the compression spring 46 upwards, so that it is released from the valve seat 42.
  • the fuel present under high pressure in the annular space 114 can flow through the outlet openings 54 to the outside.
  • valve element 58 of the common valve device 56 closes the channel 74 to the control chamber 76 in this second switching position, there continues to be a high fuel pressure which presses the first valve element 36 downward over the pressure surface 78 in FIG.
  • a high fuel pressure now rests on the region of the conical lower end surface of the valve element 36 that is located radially outside of the valve seat 38, the first valve element 36 is pressed further against the valve seat 38 due to the downward force on the pressure surface 78 in FIG. Therefore, no fuel can escape through the outlet openings 52.
  • the valve element 58 of the common valve device 56 can be brought by the actuator 64 in a third, middle switching position. In this it is neither on the valve seat 68 nor on the lower end wall of the switching chamber 60 in Figure 2. Thus, as in the second switching position, the switching chamber 60 is connected to the low pressure port 72. In addition, however, the fuel can now flow from the control chamber 76 via the channel 74 and the flow restrictor 80 into the switching chamber 60 and on to the low-pressure connection 72. As a result, the pressure in the control chamber 76 decreases to such an extent that the valve element 36 is lifted off the valve seat 38 by the high pressure applied radially outward from the valve seat 38 of the conical end surface. When the valve element 58 of the common valve device 56 is thus in the middle third switching position, fuel is discharged from the injector 22 both through the outlet openings 54 and through the outlet openings 52.

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  • 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 dispositif d'injection de carburant (22) destiné à un moteur à combustion interne, comportant un boîtier (30, 32). Ledit boîtier comporte une cavité (34) contenant deux éléments de soupape (36, 40) logés de façon coaxiale l'un par rapport à l'autre, interagissant respectivement avec un siège de soupape correspondant (38, 42). Des orifices de sortie de carburant (52, 54) sont affectés respectivement aux éléments de soupape (36, 40). L'invention vise à mettre en oeuvre un tel dispositif d'injection de carburant (22) de construction compacte. A cet effet, ledit dispositif comporte un système de soupape commun (56) présentant au moins trois positions de commutation et influençant la position des éléments de soupape (36, 40).

Claims (7)

  1. Injecteur de carburant (22) pour un moteur à combustion interne, comprenant un boîtier (30, 32), une cavité (34) dans le boîtier (30, 32), et au moins deux éléments de soupape (36, 40) coaxiaux dans la cavité (34), qui coopèrent chacun avec un siège de soupape correspondant (38, 42) et auxquels est respectivement associé un orifice de sortie de carburant (52, 54),
    caractérisé en ce que
    comme dispositif de soupape commun (56) il comprend une soupape à 3/3 voies (56) qui influence la position des éléments de soupape (36, 40) et qui est raccordée à un raccord basse pression (72), à une chambre de commande (76) du premier élément de soupape (36), et à une chambre de commande (84) d'un dispositif de soupape (86) à commande hydraulique, lui-même raccordé à une chambre de commande (114) du deuxième élément de soupape (40) et à un raccord haute pression (106).
  2. Injecteur de carburant (22) selon la revendication 1,
    caractérisé en ce que
    dans une première position de commutation du dispositif de soupape commun (56), les deux éléments de soupape (36, 40) sont appliqués sur le siège de soupape (52, 54), dans une deuxième position de commutation un des deux éléments de soupape (40) est soulevé de son siège de soupape (54), et dans une troisième position de commutation les deux éléments de soupape (36, 40) sont soulevés de leurs sièges de soupape (52, 54).
  3. Injecteur de carburant (22) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    un étranglement de l'écoulement (122) est disposé dans le chemin d'écoulement entre le raccord à haute pression (106) et la chambre de commande (84) du dispositif de soupape à commande hydraulique (86).
  4. Injecteur de carburant (22) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    un étranglement de l'écoulement (82) est disposé dans le chemin d'écoulement entre la chambre de commande (84) du dispositif de soupape à commande hydraulique (86) et le dispositif de soupape commun (56).
  5. Injecteur de carburant (22) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier élément de soupape (40) est commandé en pression et l'autre élément de soupape (36) est commandé en course.
  6. Injecteur de carburant (22) selon la revendication 5,
    caractérisé en ce que
    l'élément de soupape (40) commandé en pression est disposé radialement à l'extérieur par rapport à l'élément de soupape (36) commandé en course.
  7. Injecteur de carburant (22) selon la revendication 5 ou 6,
    caractérisé en ce que
    dans une position d'extrémité du dispositif de soupape commun (56), la chambre de commande (76) de l'élément de soupape (36) commandé en course et la chambre de commande (84) du dispositif de soupape à commande hydraulique (86) ne sont raccordées qu'au raccord haute pression (106).
EP03740027A 2002-10-09 2003-05-23 Dispositif d'injection de carburant destine a un moteur a combustion interne Expired - Lifetime EP1552136B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10246973A DE10246973A1 (de) 2002-10-09 2002-10-09 Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
DE10246973 2002-10-09
PCT/DE2003/001677 WO2004033891A1 (fr) 2002-10-09 2003-05-23 Dispositif d'injection de carburant destine a un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1552136A1 EP1552136A1 (fr) 2005-07-13
EP1552136B1 true EP1552136B1 (fr) 2006-08-23

Family

ID=32038354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740027A Expired - Lifetime EP1552136B1 (fr) 2002-10-09 2003-05-23 Dispositif d'injection de carburant destine a un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7267096B2 (fr)
EP (1) EP1552136B1 (fr)
CN (1) CN1688805A (fr)
DE (2) DE10246973A1 (fr)
WO (1) WO2004033891A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10335211A1 (de) * 2003-08-01 2005-02-17 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
DE102004002090A1 (de) * 2004-01-15 2005-08-04 Robert Bosch Gmbh Einspritzdüse und zugehöriges Betriebsverfahren
DE602006008377D1 (de) 2005-04-28 2009-09-24 Delphi Tech Inc Einspritzdüse
EP1717435B1 (fr) * 2005-04-28 2009-08-12 Delphi Technologies, Inc. Buse d'injection
DE602005009334D1 (de) * 2005-05-03 2008-10-09 Delphi Tech Inc Vorrichtung für ein Kraftstoffeinspritzventil mit schaltbaren Betriebsarten
DE102006020634B4 (de) * 2006-05-04 2008-12-04 Man Diesel Se Einspritzinjektor für Brennkraftmaschinen
JP4245639B2 (ja) * 2007-04-13 2009-03-25 トヨタ自動車株式会社 内燃機関の燃料噴射弁
US8905059B2 (en) 2012-07-20 2014-12-09 Caterpillar Inc. Diesel fuel leakage control system for a dual fuel injector
DE102013210036A1 (de) * 2013-05-29 2014-12-04 Robert Bosch Gmbh Hochdruckpumpe für ein Kraftstoffeinspritzsystem
WO2023166139A1 (fr) * 2022-03-03 2023-09-07 Ganser-Hydromag Ag Soupape d'injection de carburant pour moteurs à combustion interne
US11970977B2 (en) 2022-08-26 2024-04-30 Hamilton Sundstrand Corporation Variable restriction of a secondary circuit of a fuel injector
US20240068408A1 (en) * 2022-08-26 2024-02-29 Collins Engine Nozzles, Inc. Proportional force modification of passive spool for control of secondary nozzle circuits
US11970976B2 (en) 2022-08-26 2024-04-30 Hamilton Sundstrand Corporation Variable restriction of fuel nozzle with an auxiliary circuit
US11913382B1 (en) 2022-08-26 2024-02-27 Hamilton Sundstrand Corporation Variable restriction of a fuel circuit of a fuel nozzle
US11913381B1 (en) * 2022-08-26 2024-02-27 Hamilton Sundstrand Corporation Force modification of passive spool for control of secondary nozzle circuits

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60015218T2 (de) * 1999-04-01 2006-02-16 Delphi Technologies, Inc., Troy Brennstoffeinspritzventil
GB9916464D0 (en) * 1999-07-14 1999-09-15 Lucas Ind Plc Fuel injector
DE10058130A1 (de) 2000-11-22 2002-05-23 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
US20060060673A1 (en) * 2000-11-22 2006-03-23 Gerhard Mack Injector with separately controllable injector needles
DE10058153A1 (de) * 2000-11-22 2002-06-06 Bosch Gmbh Robert Einspritzdüse mit separat steuerbaren Düsennadeln
US6557776B2 (en) * 2001-07-19 2003-05-06 Cummins Inc. Fuel injector with injection rate control
US6705543B2 (en) * 2001-08-22 2004-03-16 Cummins Inc. Variable pressure fuel injection system with dual flow rate injector
US6725838B2 (en) * 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same

Also Published As

Publication number Publication date
EP1552136A1 (fr) 2005-07-13
US7267096B2 (en) 2007-09-11
DE10246973A1 (de) 2004-04-22
US20060144964A1 (en) 2006-07-06
CN1688805A (zh) 2005-10-26
WO2004033891A1 (fr) 2004-04-22
DE50304778D1 (de) 2006-10-05

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