EP1503073A1 - Pumpe-Düse-Vorrichtung - Google Patents
Pumpe-Düse-Vorrichtung Download PDFInfo
- Publication number
- EP1503073A1 EP1503073A1 EP04017275A EP04017275A EP1503073A1 EP 1503073 A1 EP1503073 A1 EP 1503073A1 EP 04017275 A EP04017275 A EP 04017275A EP 04017275 A EP04017275 A EP 04017275A EP 1503073 A1 EP1503073 A1 EP 1503073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- inlet channel
- nozzle
- throttle element
- 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.)
- Granted
Links
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
- F02M59/366—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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/001—Pumps with means for preventing erosion on fuel discharge
-
- 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
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
-
- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
-
- 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
- F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
-
- 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
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
Definitions
- the invention relates to a pump-nozzle device with a Pump, a valve and a nozzle unit.
- a pump-nozzle device is used in particular for fuel supply in a combustion chamber of a direct injection internal combustion engine, used in particular a diesel internal combustion engine.
- the pump, a control unit, in addition to the valve also a Actuator comprises, which preferably consists of a piezo stack is formed, and the nozzle unit form a structural unit.
- the drive of a piston of the pump is preferably carried out via a camshaft of an internal combustion engine by means of a rocker arm.
- the pump is connected via the valve to a low-pressure fuel supply device hydraulically coupled. It is hydraulically coupled on the output side with the nozzle unit.
- Start of injection and injection quantity are by the Valve and its actuator determined. Due to the compact Construction of the pump-nozzle device results in a very low High pressure volume and high hydraulic stiffness. There are so very high injection pressures of about 2000 bar allows. This high injection pressure in conjunction with the good controllability of the start of injection and the injection quantity enable a significant reduction in emissions at the same time low fuel consumption when used in Internal combustion engines.
- a pump-nozzle device with a pump and a valve with a valve member, the hydraulic coupling of a Ab horrraums with a Flow channel controls.
- the drainage channel is hydraulically coupled with the pump and a nozzle unit.
- An inlet channel is provided which is hydraulically coupled to the Ab horrraum.
- the valve member is a piezoelectric actuator assigned, via which the valve member between two end positions can be adjusted. In a first end position of the valve member, the drainage channel is hydraulically coupled with a Ab tenuraum and this in turn with the inlet channel. In a second end position of the valve member is the Drain channel hydraulically decoupled from the discharge chamber.
- the valve member In the first end position of the valve member is during a Delivery strokes of the pump fluid from the inlet channel via the Abersonraum and the drainage channel sucked by the pump. While a working stroke of a pump piston of the pump is in the first end position of the valve member fluid from the pump pushed back via the supply channel, the discharge chamber in the drainage channel. In the second end position of the valve member can during the delivery stroke of the pump piston because of the missing hydraulic coupling of the drainage channel with the discharge chamber and no fluid is pushed back to the drain channel and the pump piston generates high pressure. With crossing a predetermined pressure threshold opens a nozzle needle the Nozzle unit, a nozzle of the nozzle unit and there is a Injection of the fluid.
- the object of the invention is a pump-nozzle device which ensures low noise emissions during operation.
- the invention is based on the recognition that during the Operation of the Prior Art Pump-Nozzle Device substantially caused noise emissions are due to cavitations after making the hydraulic Coupling between the drainage channel with high pressure standing fluid and the Abgresraum and the drainage channel. Of the resulting Abêtimpuls leads to pressure waves of high amplitude in the fluid in the region of the discharge chamber and the feed channel, in the form of sound waves from the pump-nozzle device be transmitted to the outside.
- the invention is characterized in that in the inlet channel a throttle element is provided.
- the throttle element causes a rapid increase in pressure in the Abberichtraum and slows down the outflow of fluid into the inlet channel. Thereby becomes the time within which cavitations occur greatly reduced and so the generation of sound emissions strongly attenuated in a simple way.
- the throttle element in particular high-frequency noise components significantly reduced during the Ab horrvorgangs.
- By the Reducing the cavitation time is also the so-called.
- Cavitation erosion on the valve member and on the walls of the Abjuriraums significantly reduced. Cavitation erosion is caused by the imploding of gas bubbles, the cavitation by Evaporation of the fluid can be formed.
- valve member is extremely unsteady and precise Setting the position of the valve member thus difficult to achieve.
- the reduction in cavitation time, which is caused by the throttle element also a more precise control of the valve member.
- the throttle element in the form of a stepped bore of the inlet channel educated. This has the advantage of being easy is to produce.
- At least two throttle elements are arranged in the inlet channel. This results in a further improved reduction the noise emissions.
- the at least two throttle elements are arranged so spaced apart, that they have predetermined frequencies of pressure oscillations of the fluid in the inlet duct or in predetermined others Transform frequency ranges. This results in a very effective reducing z. B. audible to humans Sound emissions.
- a pump-nozzle device ( Figure 1) comprises a pump unit 1, a control unit 2 and a nozzle unit 5.
- the Pump-nozzle device is preferably used for feeding of fuel into the combustion chamber of a cylinder of an internal combustion engine.
- the internal combustion engine is preferably as Diesel internal combustion engine trained.
- the internal combustion engine has an intake tract, which by means of gas inlet valves with cylinders can be coupled and is sucked in through the air.
- the Internal combustion engine also has an exhaust tract over controlled the exhaust valve to eject from the cylinders Discharges gases.
- the cylinders are each assigned pistons, each via a connecting rod with a crankshaft are coupled.
- the crankshaft is with a camshaft coupled.
- the pump unit comprises a piston 11, a pump body 12, a pumping chamber 13 and a pump return means 14, the is preferably designed as a spring.
- the piston 11 is in built-in state in an internal combustion engine with a camshaft coupled, preferably by means of a rocker arm, and is driven by this.
- the piston 11 is in one Recess of the pump body 12 out and determined dependent from its position the volume of a pumping space 13.
- the pump return means 14 is designed and arranged that limited by the piston 11 volume of the pump chamber 13 has a maximum value when on the piston no outer Forces, d. H. Forces beyond the coupling with the camshaft be transmitted.
- the nozzle unit 5 comprises a nozzle body 51 in which a Nozzle return means 52, as a spring and possibly in addition is designed as a damping unit, and a needle 53 is arranged are.
- the needle 53 is in a recess of the nozzle body 51 arranged and is in the range of a needle guide 55 led.
- the needle 53 is located at a Needle seat 54 and thus closes a nozzle 56, the Feeding the fuel into the combustion chamber of the cylinder Internal combustion engine is provided.
- the nozzle unit 5 is preferably, as illustrated, as an inwardly opening nozzle unit intended.
- the needle 53 In a second state, the needle 53 is slightly spaced to the needle seat 54 toward the nozzle return means 52 and thus releases the nozzle 56. In this second state, fuel enters the combustion chamber metered to the cylinder of the internal combustion engine.
- the first or second state is taken depending on a balance of forces from the force generated by the nozzle return means 52 acting on the needle 53 and from the counteracting this Force caused by the hydraulic pressure in the area of the needle heel 57 is caused.
- the control unit comprises an inlet channel 21 and an outlet channel 22.
- the inlet channel 21 and the outlet channel 22 are hydraulically coupled by means of a valve.
- the inlet channel 21 is from a low-pressure side port of the pump-nozzle device led to the valve.
- the drainage channel 22 is hydraulically coupled to the pumping chamber 13 and is out led to the needle heel 57 and is hydraulically dependent from the state occupied by the needle 53 the nozzle 56 coupled.
- the valve comprises a valve member 231, preferably as so-called A-valve is formed, d. H. it opens to the outside against the flow direction of the fluid.
- the valve includes a Abschraum 232, which is hydraulically coupled with the inlet channel 21 and by means of the valve member 231 with a high pressure chamber 233 is hydraulically coupled.
- the high pressure room 233 is hydraulically coupled to the drainage channel 22nd
- valve return means 235 is provided, which is arranged and adapted to be the valve member 231 in an open position, d. H. spaced to the Valve seat 234 presses when by an actuator 24th acting on the valve member forces are less than that Forces generated by the valve return means 235 on the valve member 231 act.
- the actuator 24 is preferably as Piezo stack formed. But he can also do another One skilled in the art and suitable for such an application Actuator, such as an electromagnetic actuator be.
- the actuator 24 is preferably by means of a transformer, which preferably amplifies the stroke of the actuator 24, coupled to the valve member 231.
- On the actuator 24 is preferably also a plug 26 for receiving of electrical contacts for controlling the actuator 24 provided.
- valve member 231 In the open position of the valve member 231 is in one movement of the piston 11, the upward d. H. towards the way directed from the nozzle 56, fuel via the inlet channel 21 sucked towards the pump room 13. As long as the valve member 231 during a subsequent downward movement of the piston 11, d. H. with a movement directed towards the nozzle 56, still in its open position, the one in the Pump chamber 13 located fuel back through the valve in the Abêtraum 232 and possibly in the inlet channel 21st pushed back.
- valve member 231 is controlled in its closed position, is in the pump chamber 13 and thus also in the flow channel 22nd and compresses the fuel located in the high pressure space 233, causing the pressure with increasing downward movement of the piston 11 in the pump chamber 13, in the high-pressure chamber 233 and in the Drain channel 22 increases. According to the rising pressure in the Drain passage 22 also increases due to the hydraulic pressure caused force on the needle heel 57 in the direction an opening movement of the needle 53 to release the nozzle 56th acts.
- a throttle element 27 is arranged in the inlet channel 21 ( Figure 2).
- the throttle element 27 causes a fast Pressure increase in the Abberichtraum 232 and slows down the outflow of the fuel in the inlet channel 21. This is the length of time within which cavitations occur is strong reduces and thus the generation of sound emissions to simple Way strongly muted. Be through the throttle element especially high-frequency noise during the Ab horrvorgangs significantly reduced.
- d. H the time while the fuel is from High-pressure chamber 233 toward the Abêtraum 232 with sound velocity flows and at which vapor bubbles form, the then in a region of lower flow velocity implode again and thereby generate sound and also damage on the valve body, greatly reduced. So The generation of sound emissions is easy heavily steamed.
- Throttling element 27 is arranged very close to the diversion chamber 232, as shown in Figure 2. The closer the throttle element 27 is arranged at the Abberichtraum, the more effective the noise emissions are reduced. Furthermore, it will be like that a sealing connection between the inlet channel and a this associated fuel supply device, which usually done by means of an O-ring, spared and so their Lifespan increased.
- the throttle element is particularly easy through a stepped bore produced.
- a first Pilot hole and the holes can then be rounded hydroerosiv become.
- the throttle element 27 can also be used as an insert be used in the inlet channel 21.
- the pump-nozzle device ( Figure 3) are at least two throttle elements 16, 61, 62, 63rd arranged in the inlet channel 21.
- a suitable dimensioning the throttle elements 60 to 63 and a suitable one Spacing the throttle elements 60 to 63 can predetermined Frequencies of the pressure oscillations of the fuel in the inlet channel Be intentionally subdued or into predetermined others, preferably inaudible to humans, frequency ranges be transformed.
- the throttle elements act 60 to 63 in conjunction with the inlet channel 21 as Resonators and reflect each pressure waves with a given wavelength, so that the corresponding wave dissipated.
- the or the Drosselelemte 27, 60th to 63 and the diversion room are designed so that the Pumping chamber 13 via the inlet channel 21 even at a predetermined Low pressure value, preferably 3 to 10 bar in the inlet channel 21 can be filled within a predetermined period of time is.
- the predetermined period of time depends on the Speed of the crankshaft selected. This ensures that that the operation of the pump-nozzle device, d. H. the earliest possible start of injection and the maximum possible Injection amount through the throttle element 27, 60 to 63 not to be influenced.
- the solid line in Figure 4 shows an exemplary Pressure curve in a pump-nozzle device according to FIG 2 in the drain channel 22.
- a time t1 is the Threshold pthr of pressure exceeded and thus begins the fuel metering into the cylinder, as in FIG. 5 Plotted on the basis of the metered amount of fuel Qinj the time t is shown.
- the threshold value pthr of the pressure falls below again and thus ending the fuel metering.
- the throttle element 27 is formed and arranged and also the Abschraum 27 is formed so that in Comparison to a pump-nozzle device without the throttle element 27 the pressure drop at pressures above the threshold pthr is identical (see dashed line of Pressure).
- the pressure curve is shown for the case at the throttle element 27 is dimensioned so that in the given low pressure value no complete filling of the Pump room 13 is guaranteed.
- the Pressure build-up in the pump chamber 13 only delayed and the Threshold pthr is only reached at time t2.
- the Throttle element 27 is dimensioned in this case so that after a Abêtn of the valve by the throttle effect of Throttle element 27, the pressure already above the threshold pthr drops more slowly than in the unthrottled case. This also has the consequence that the end of the fuel metering only delayed occurs at time t5.
- the dotted line sets the course of the dotted Line in the event that the throttle element 27 so dimensioned is that its throttling effect only below the Threshold pthr to a change in pressure drop in Comparison with the unthrottled case leads.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Figur 1
- ein erstes Ausführungsbeispiel einer Pumpe-Düse-Vorrichtung,
- Figur 2
- eine Ausschnittsvergrößerung der Pumpe-Düse-Vorrichtung gemäß Figur 1,
- Figur 3
- ein zweites Ausführungsbeispiel der Pumpe-Düse-Vorrichtung,
- Figur 4
- den Verlauf des Drucks innerhalb des Hochdruckbereichs der Pumpe-Düse-Vorrichtung aufgetragen über die Zeit t und
- Figur 5
- der eingespritzte Kraftstoffmassenstrom Qinj aufgetragen über die Zeit t.
Claims (7)
- Pumpe-Düse-Vorrichtung mit einer Pumpe und einem Ventil mit einem Ventilglied (231), das die hydraulische Kopplung eines Absteuerraums (232) mit einem Ablaufkanal (22) steuert, der hydraulisch gekoppelt ist mit der Pumpe und einer Düseneinheit (5), wobei ein Zulaufkanal (21) vorgesehen ist, der hydraulisch gekoppelt ist mit dem Absteuerraum (232), dadurch gekennzeichnet, dass der Zulaufkanal (21) ein Drosselelement (27, 60 bis 63) umfasst.
- Pumpe-Düse-Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Drosselelement (27, 60 bis 63) nahe des Absteuerraums (232) angeordnet ist.
- Pumpe-Düse-Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Absteuerraum (232) und das Drosselelement (27, 60 bis 63) so ausgebildet sind, dass die Pumpe über den Zulaufkanal (21) auch bei einem vorgegebenen Niederdruckwert in dem Zulaufkanal (21) vollständig mit Fluid über den Zulaufkanal (21) innerhalb einer vorgegebenen Zeitdauer befüllbar ist.
- Pumpe-Düse-Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Absteuerraum (232) und das Drosselelement (27, 60 bis 63) so ausgebildet sind, dass ein Ende des Einspritzens von Fluid über die Düseneinheit (5) mittels des Ventilglieds (231) steuerbar ist, unabhängig von dem Drosselelement (27, 60 bis 63).
- Pumpe-Düse-Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Drosselelement (27, 60 bis 63) in Form einer Stufenbohrung des Zulaufkanals (21) gebildet ist.
- Pumpe-Düse-Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass mindestens zwei Drosselelemente (60 bis 63) in dem Zulaufkanal (21) angeordnet sind.
- Pumpe-Düse-Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Drosselelemente (60 bis 63) so beabstandet angeordnet sind, dass sie vorgegebene Frequenzen der Druckschwingungen des Fluids in dem Zulaufkanal (21) dämpfen oder in vorgegebene andere Frequenzbereiche transformieren.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003133787 DE10333787A1 (de) | 2003-07-24 | 2003-07-24 | Pumpe-Düse-Vorrichtung |
DE10333787 | 2003-07-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1503073A1 true EP1503073A1 (de) | 2005-02-02 |
EP1503073B1 EP1503073B1 (de) | 2007-09-05 |
Family
ID=33521414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04017275A Not-in-force EP1503073B1 (de) | 2003-07-24 | 2004-07-22 | Pumpe-Düse-Vorrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1503073B1 (de) |
DE (2) | DE10333787A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011088928A1 (de) * | 2010-01-25 | 2011-07-28 | Robert Bosch Gmbh | Einspritzvorrichtung mit reduzierten druckschwingungen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0823550A1 (de) * | 1996-08-06 | 1998-02-11 | Lucas Industries Public Limited Company | Einspritzventil |
EP0905719A2 (de) * | 1997-09-20 | 1999-03-31 | LUCAS INDUSTRIES public limited company | Steuerungsverfahren |
US6240905B1 (en) * | 1998-08-06 | 2001-06-05 | Robert Bosch Gmbh | Unit fuel injector |
US20020113140A1 (en) * | 2000-05-16 | 2002-08-22 | Matthias Beck | Fuel injection apparatus for an internal combustion engine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123914B4 (de) * | 2001-05-17 | 2005-10-20 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung mit Druckübersetzungseinrichtung und Druckübersetzungseinrichtung |
-
2003
- 2003-07-24 DE DE2003133787 patent/DE10333787A1/de not_active Ceased
-
2004
- 2004-07-22 EP EP04017275A patent/EP1503073B1/de not_active Not-in-force
- 2004-07-22 DE DE200450004853 patent/DE502004004853D1/de active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0823550A1 (de) * | 1996-08-06 | 1998-02-11 | Lucas Industries Public Limited Company | Einspritzventil |
EP0905719A2 (de) * | 1997-09-20 | 1999-03-31 | LUCAS INDUSTRIES public limited company | Steuerungsverfahren |
US6240905B1 (en) * | 1998-08-06 | 2001-06-05 | Robert Bosch Gmbh | Unit fuel injector |
US20020113140A1 (en) * | 2000-05-16 | 2002-08-22 | Matthias Beck | Fuel injection apparatus for an internal combustion engine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011088928A1 (de) * | 2010-01-25 | 2011-07-28 | Robert Bosch Gmbh | Einspritzvorrichtung mit reduzierten druckschwingungen |
CN102725507A (zh) * | 2010-01-25 | 2012-10-10 | 罗伯特·博世有限公司 | 具有减小的压力振动的喷射装置 |
CN102725507B (zh) * | 2010-01-25 | 2015-09-23 | 罗伯特·博世有限公司 | 具有减小的压力振动的喷射装置 |
US9279401B2 (en) | 2010-01-25 | 2016-03-08 | Robert Bosch Gmbh | Injection device having reduced pressure oscillations |
Also Published As
Publication number | Publication date |
---|---|
DE10333787A1 (de) | 2005-02-24 |
EP1503073B1 (de) | 2007-09-05 |
DE502004004853D1 (de) | 2007-10-18 |
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