EP1329629A2 - Doppeltschaltendes Ventil für Kraftstoffeinspritzanlagen - Google Patents
Doppeltschaltendes Ventil für Kraftstoffeinspritzanlagen Download PDFInfo
- Publication number
- EP1329629A2 EP1329629A2 EP02027747A EP02027747A EP1329629A2 EP 1329629 A2 EP1329629 A2 EP 1329629A2 EP 02027747 A EP02027747 A EP 02027747A EP 02027747 A EP02027747 A EP 02027747A EP 1329629 A2 EP1329629 A2 EP 1329629A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- nozzle
- needle
- valve needle
- chamber
- 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims description 21
- 238000002347 injection Methods 0.000 title claims description 21
- 239000007924 injection Substances 0.000 title claims description 21
- 239000013078 crystal Substances 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- F02M59/20—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
- F02M59/365—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages valves being actuated by the fluid pressure produced in an auxiliary pump, e.g. pumps with differential pistons; Regulated pressure of supply pump actuating a metering valve, e.g. a sleeve surrounding the pump 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
-
- 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
- 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
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
Definitions
- the pressure is built up by a piston. The pressure opens the injection valve when a certain value is reached.
- Pump-nozzle systems (UI-Unit Injector systems) are now on auto-igniting Internal combustion engines generate mechanically-hydraulically controlled injection phases, which on the one hand contribute to noise reduction and on the other hand to minimize pollutants.
- a pump piston is moved upwards via a return spring.
- the one under constant overpressure standing fuel flows from the low pressure part of the fuel supply via the Engine block-integrated inlet bores and the inlet channel in a valve chamber Solenoid valve.
- the solenoid valve is open. The passes through a connecting hole Fuel into the high pressure room.
- a third phase of the injection process when using an electromagnetic valve the coil of the electromagnet by the control unit at a certain time energized so that the solenoid valve needle is pulled into a seat and the connection is closed between the high pressure chamber and the low pressure part. That time will also called “electrical start of spraying".
- the fuel pressure in the high pressure room increases continuously due to the movement of the pump piston, which also increases pressure increases at the injector.
- a nozzle opening pressure is reached The nozzle needle is raised by approximately 300 bar, which brings fuel into the combustion chamber is injected. This time is also called the "actual start of spraying" or also referred to as the start of funding. Due to the high delivery rate of the pump piston the pressure continues to rise during the entire injection process.
- the coil of the electromagnet is switched off again, after which the solenoid valve opens after a short delay and the connection between high pressure chamber and low pressure part is released again.
- the peak pressure is reached, which, depending on the pump type, between a maximum 1800 and 2050 bar varies. Then the pressure breaks down very quickly. When falling short of the nozzle closing pressure closes the injection nozzle and ends the injection process. The rest from the pump element to the apex of the drive cam Pumped fuel is fed into the low pressure part of the fuel system via the return channel pressed.
- Such pump nozzle systems used, for example, in truck injection systems usually include two actuators designed as electromagnets. With two digits the unit injector system (UIS) requires more installation space than in such applications Injection systems for commercial vehicles are available.
- the trained as solenoid valves Actuators can therefore be easily accommodated on truck diesel engines.
- at Passenger cars is in the engine compartment, especially in the upper area of the Cylinder block, limited space available, what the external dimensions of a pump-nozzle system.
- a piezo actuator If a piezo actuator is used, its stroke can be changed by changing the voltage vary as desired on the piezo actuator.
- the actuator of the pump-nozzle unit designed as a piezo actuator (PDE) can be used to implement the required travel distances within the A hydraulic pressure intensifier can be connected downstream of the housing of the pump-nozzle unit.
- An actuator designed as a piezo actuator can be energized in accordance with transfer different switching positions. In a de-energized, de-energized state of the piezo actuator, the nozzle needle assumes an open position, i.e. Fuel comes with low pressure by the fuel feed pump by the unit injector (PDE) pumped. In this position of the nozzle needle are the inlet and the low pressure side Inlet to a high-pressure pump chamber connected in a short circuit, because the openings corresponding to these within the housing of the unit injector are released by the nozzle needle.
- PDE unit injector
- the nozzle needle When the piezo actuator is energized to the maximum, the nozzle needle is moved downwards, i.e. the low-pressure inlet and high-pressure inlet to the pump room are both locked. In this phase, the pressure builds up without the needle passing through the steadily increasing pressure would be opened. However, is the desired injection pressure built in the pump-nozzle unit (PDE), the current supply to the piezo actuator is withdrawn, whereby the nozzle needle opens with pressure support.
- PDE pump-nozzle unit
- FIG. 1 shows a pump-nozzle unit (PDE), which is designed as a piezo actuator Actuator is actuated.
- PDE pump-nozzle unit
- the illustration according to FIG. 1 shows that the pump-nozzle unit shown there 1 comprises a pump part 2 and a nozzle part 3.
- the nozzle part 3 of the pump-nozzle unit 1 (PDE) is in the cylinder head 4 of a self-igniting, not shown here Internal combustion engine inserted.
- the nozzle part 3 of the pump-nozzle unit 1 is screwed into a cylinder head bore 22 and by means of a spacer 32 and with the help of O-rings 33 in the cylinder head bore 22 sealed.
- an actuator 5 is received, which as Is formed piezo actuator and comprises a piezo crystal arrangement in stack form.
- the electrical control of the piezocrystal stack 7 takes place via a switch 5 on the side Recorded plug connection 6.
- the actuator 5 is on the side of the pump housing 8 of the Pump part 2 of the pump-nozzle unit 1 is added and acts on a hydraulic Coupler 38, the one in a nozzle body 23 of the via a coupler line 39 Nozzle part 3 displaceably arranged valve needle 24 acted on the end face.
- a pump piston 9 is embedded, which is operated via a rocker arm 17 controlled by camshafts.
- the face 11 of the pump piston 9 delimits a pressure chamber 10 which is in the pump housing 8 of the pump part 2 of the pump-nozzle unit 1 is added.
- the pump piston 9 is moved in the pump housing 8 in the axial direction and is through a spring element 12 configured here as a spiral spring is biased. That as a spiral spring 12 trained spring element is supported on the one hand on a collar 13 of the pump housing 8 and on the other hand on a spring plate 14, which is penetrated by a pressure pin 15.
- the pressure pin 15 in turn is supported on a ball socket element 16 and acts on the end face of the pump piston 9 facing away from the pump chamber 11.
- the pressure pin 15, which is received with its lower end in a pin socket 16 is at its end opposite the pin socket 16 by a rocker arm 17 enclosed, which is rotatable about a rocker arm axis 18.
- a rocker arm roller 19 is rotatably supported, which runs with its outer peripheral surface on an eccentric cam 21, which is on a camshaft 20 is formed. Due to the outer peripheral contour of the eccentric cam 21 the axial movement of the pump piston 9 transmitted via the rocker arm 17 within of the pump housing 8 of the pump part 2 of the pump-nozzle unit 1 generated.
- the nozzle body 23 of the nozzle part 3 which is let into the cylinder head bore 22 comprises a valve needle 24 which is moved in the axial direction within the nozzle body 23.
- the upper end face 40 of the valve needle 24 is connected to the hydraulic via the coupler line 39 Coupler 38 in connection, which in turn by the piezocrystal stack arrangement 7 of the actuator 5 is applied.
- the valve needle 24 of the 2/2-way valve in the nozzle body 23 is acted upon by a return spring.
- the Return spring assigned to the end face of the valve needle 24 facing away from the end face 40 is, in turn, supported on a disc-shaped element, which by a Nozzle needle spring 35 is acted upon.
- a Fuel return identified by reference numeral 36 the one above that by reference numeral 37 designated fuel inlet to the nozzle body 23 is arranged.
- the nozzle body 23 is with the combustion chamber of the self-igniting internal combustion engine part assigned via a nozzle clamping nut 34. This seals the two Parts of the nozzle body 23 against each other and creates a fuel-tight connection between the pump chamber 11 of the pump part 2 and the high pressure inlets 26, 27 to the control room 25 or to the nozzle room 28.
- Figure 2.1 shows a piezo actuator with a hydraulic coupling space, which is in a first switch position is set.
- Figure 2.3 shows the piezo actuator with a downstream hydraulic coupler in one further, the third position 43.
- valve needle 24 becomes the energization of the piezo crystal stack arrangement 7 of the actuator 5 withdrawn to a second voltage level 56 (cf. illustration according to FIG. 3).
- the voltage drops in accordance with a first falling voltage edge 55 first voltage level 54, which during the second position 42 of the valve needle 24 is held back to a second, lower voltage level 56 (see illustration according to Figure 3).
- the pressure in the hydraulic coupler 38 and the coupler line 39 increases so that the valve needle 24, the end face 40 of which is acted upon by the high pressure, by a second stroke 46 in the vertical direction with respect to the nozzle body 23 opens up.
- the return 36 is open, while the inlet 37 continues through the valve needle 24, analogous to the illustration in FIG Figure 2.2, remains closed.
- the nozzle needle 29 (cf. illustration according to FIG. 1) is thereby opened with pressure support.
- FIG. 3 shows the voltage profile with which the 2/2-way valve, which is designed as a piezo actuator double switching piezo actuator is controlled.
- the voltage corresponds to the level which in Figure 3 is present before the rising edge 50 of the voltage.
- the pressure build-up phase 52 will generated by the rising edge 50 of the voltage down to a first voltage level 54.
- the start of funding is shown with reference number 51.
- the pressure build-up phase 52 can are kept variable and is controlled by the actuation of the nozzle needle 29 the valve needle 24 independently, i.e. Cut.
- the Piezo actuator 5 energized at the first voltage level 54. The pressure builds up without that the nozzle needle 29 by the pressure building up in the pump chamber 11 of the pump part 2 of the unit injector is opened.
- the first Voltage level 54 lowered to a second voltage level 56.
- the valve needle 24 of the 2/2-way valve the unit injector 1 in the second position, as shown in the illustration Figure 2.2 is identified by reference numeral 42, i.e. the inlet 37 and the return 36 to the pump room 11 are closed. If the first voltage level 54 is along the first falling voltage edge 55 lowered to the second voltage level 56 takes place a relief of the hydraulic coupler 38, since the piezocrystal arrangement 7 at Apply a low voltage level corresponding to the second voltage level 56 contracted.
- valve needle 24 moves by the second stroke 46 in accordance with the representation in Figure 2.3 in its third position.
- inlet 37 still closed, while the return 36 to the pump chamber 11 remains open.
- the second voltage level 56 is applied up to the delivery end 57 of the fuel pump drops to the 0 level in accordance with a further, second falling voltage edge 58 from.
- the valve needle 24 again takes the one shown in FIG. 2.1 first position 41, in which the nozzle needle a first stroke 45 within the Nozzle body 23 covers and in which the inlet 37 and the return 36 together are short-circuited.
- the pump chamber 11 the pump part 2 to build up pressure and the opening of the nozzle needle 29 separately controlled.
- the injection pressure can be reduced control freely, whereby the pressure build-up phase is unaffected.
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
Description
- Figur 1
- eine Pumpe-Düse-Einheit (PDE), welche mittels eines Magnetventils betätigbar ist,
- Figur 2.1
- einen Piezoaktor mit hydraulischem Kopplungsraum in einer ersten Schaltstellung,
- Figur 2.2
- den Piezosteller mit nachgeschaltetem hydraulischen Kopplungsraum mit vollständig geschlossener Düsennadel,
- Figur 2.3
- den Piezosteller mit nachgeschaltetem hydraulischen Kopplungsraum in einer druckunterstützt angesteuerten Zwischenposition und
- Figur 3
- das Spannungsprofil, mit dem der Piezoaktor ansteuerbar ist.
Claims (10)
- Pumpe-Düse-Einheit (1) zum Einspritzen von Kraftstoff in den Brennraum einer selbstzündenden Verbrennungskraftmaschine mit einem Pumpenteil (2) und einem Düsenteil (3) und einem Steller (5), dem ein hydraulischer Koppler (38, 39) nachgeschaltet ist, über den eine Ventilnadel (24) eines 2/2-Wege-Ventils innerhalb eines Düsenkörpers (23) betätigbar ist, dadurch gekennzeichnet, dass der Steller (5) eine auf den hydraulischen Koppler (38, 39) einwirkende Piezokristall-Anordnung (7) umfaßt und eine Stirnseite (40) der Ventilnadel (24) beaufschlagt, die in eine einen Druckaufbau ermöglichende erste Position (41) stellbar ist, wobei eine das Öffnen einer Düsennadel (29) ermöglichende weitere Position (43) der Ventilnadel (24) unabhängig einstellbar ist.
- Pumpe-Düse-Einheit gemäß Anspruch 1, dadurch gekennzeichnet, dass der hydraulische Koppler (38, 39) im Düsenkörper (23) in eine die Ventilnadel (24) führende Nadelführung (44) übergeht.
- Pumpe-Düse-Einheit gemäß Anspruch 1, dadurch gekennzeichnet, dass vom Pumpenraum (10) des Pumpenteils (2) ein Steuerraumzulauf (26) und ein Düsenraumzulauf (27) abzweigen, die einen Steuerraum (25) der Ventilnadel (24) und einen die Düsennadel (29) umgebenden Düsenraum (28) gleichzeitig beaufschlagen.
- Pumpe-Düse-Einheit gemäß Anspruch 1, dadurch gekennzeichnet, dass in Längsrichtung der Düsennadel (29) gesehen im Düsenkörper (23) der Zulauf (37) oberhalb des Rücklaufes (36) angeordnet ist.
- Pumpe-Düse-Einheit gemäß Anspruch 4, dadurch gekennzeichnet, dass in der ersten Position (41) der Ventilnadel (24) bei unbestromtem Steller (5) ein Zulauf (37) und der Rücklauf (36) im Düsenkörper (23) kurzgeschlossen sind.
- Pumpe-Düse-Einheit gemäß Anspruch 4, dadurch gekennzeichnet, dass bei Bestromung des Stellers (5) auf ein erstes Spannungsniveau (54) der Zulauf (37) und der Rücklauf (36) durch die Ventilnadel (24) verschlossen sind und ein Druckaufbau (52) im Pumpenraum (10) des Pumpenteils (2) erfolgt.
- Pumpe-Düse-Einheit gemäß Anspruch 4, dadurch gekennzeichnet, dass nach Ablauf einer Druckaufbauphase (52) im Pumpenraum (10) des Pumpenteils (2) bei Einspritzbeginn (53) der Steller (5) mit einem zweiten Spannungsniveau (54) beaufschlagt ist und die Düsennadel (29) druckunterstützt öffnet.
- Pumpe-Düse-Einheit gemäß Anspruch 7, dadurch gekennzeichnet, dass der Einspritzbeginn (53) und die Druckaufbauphase (52) durch Verschließen des Pumpenraumes (10) getrennt voneinander steuerbar sind.
- Pumpe-Düse-Einheit gemäß Anspruch 5, dadurch gekennzeichnet, dass sich in der ersten Position (41) der Ventilnadel (24) ein erster Hubweg (55) der Ventilnadel (24) einstellt, bei dem der Zulauf (37) und der Rücklauf (36) offenstehen.
- Pumpe-Düse-Einheit gemäß Anspruch 7, dadurch gekennzeichnet, dass sich in einer dritten Position (43) der Ventilnadel (24) ein zweiter Hubweg (46) der Ventilnadel (24) einstellt, bei dem Rücklauf (36) zum Pumpenraum (10) geöffnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10201470A DE10201470A1 (de) | 2002-01-16 | 2002-01-16 | Doppeltschaltendes Ventil für Kraftstoffeinspritzanlagen |
DE10201470 | 2002-01-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1329629A2 true EP1329629A2 (de) | 2003-07-23 |
EP1329629A3 EP1329629A3 (de) | 2004-09-22 |
Family
ID=7712281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02027747A Withdrawn EP1329629A3 (de) | 2002-01-16 | 2002-12-11 | Doppeltschaltendes Ventil für Kraftstoffeinspritzanlagen |
Country Status (4)
Country | Link |
---|---|
US (1) | US6726128B2 (de) |
EP (1) | EP1329629A3 (de) |
JP (1) | JP2003214282A (de) |
DE (1) | DE10201470A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502005010478D1 (de) * | 2004-02-25 | 2010-12-16 | Ganser Hydromag | Brennstoffeinspritzventil für verbrennungskraftmaschinen |
EP2092186B1 (de) * | 2006-10-16 | 2010-01-20 | Ganser-Hydromag Ag | Brennstoffeinspritzventil für verbrennungskraftmaschinen |
US20090212127A1 (en) * | 2007-12-14 | 2009-08-27 | Weidlinger Associates, Inc. | Fuel injector with single crystal piezoelectric actuator stack |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4653455A (en) * | 1984-09-14 | 1987-03-31 | Robert Bosch Gmbh | Electrically controlled fuel injection pump for internal combustion engines |
US6089470A (en) * | 1999-03-10 | 2000-07-18 | Diesel Technology Company | Control valve assembly for pumps and injectors |
DE19939523A1 (de) * | 1999-08-20 | 2001-03-29 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10035815A1 (de) * | 2000-07-22 | 2002-01-31 | Bosch Gmbh Robert | Verfahren zur Steuerung eines Einspritzventils |
DE10123994A1 (de) * | 2001-05-17 | 2002-11-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
WO2003054374A1 (de) * | 2001-12-20 | 2003-07-03 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung fuer eine brennkraftmaschine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4618095A (en) * | 1985-07-02 | 1986-10-21 | General Motors Corporation | Electromagnetic unit fuel injector with port assist spilldown |
DE4341545A1 (de) * | 1993-12-07 | 1995-06-08 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
DE19939447A1 (de) * | 1999-08-20 | 2000-11-23 | Bosch Gmbh Robert | Einrichtung zur Einspritzung von Kraftstoff |
-
2002
- 2002-01-16 DE DE10201470A patent/DE10201470A1/de not_active Ceased
- 2002-12-11 EP EP02027747A patent/EP1329629A3/de not_active Withdrawn
-
2003
- 2003-01-15 JP JP2003007508A patent/JP2003214282A/ja active Pending
- 2003-01-16 US US10/345,364 patent/US6726128B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4653455A (en) * | 1984-09-14 | 1987-03-31 | Robert Bosch Gmbh | Electrically controlled fuel injection pump for internal combustion engines |
US6089470A (en) * | 1999-03-10 | 2000-07-18 | Diesel Technology Company | Control valve assembly for pumps and injectors |
DE19939523A1 (de) * | 1999-08-20 | 2001-03-29 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10035815A1 (de) * | 2000-07-22 | 2002-01-31 | Bosch Gmbh Robert | Verfahren zur Steuerung eines Einspritzventils |
DE10123994A1 (de) * | 2001-05-17 | 2002-11-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
WO2003054374A1 (de) * | 2001-12-20 | 2003-07-03 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung fuer eine brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
US6726128B2 (en) | 2004-04-27 |
JP2003214282A (ja) | 2003-07-30 |
US20030146306A1 (en) | 2003-08-07 |
DE10201470A1 (de) | 2003-08-07 |
EP1329629A3 (de) | 2004-09-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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