WO2001014734A1 - Einspritzsystem und verfahren zum betreiben eines einspritzsystems - Google Patents
Einspritzsystem und verfahren zum betreiben eines einspritzsystems Download PDFInfo
- Publication number
- WO2001014734A1 WO2001014734A1 PCT/DE2000/002680 DE0002680W WO0114734A1 WO 2001014734 A1 WO2001014734 A1 WO 2001014734A1 DE 0002680 W DE0002680 W DE 0002680W WO 0114734 A1 WO0114734 A1 WO 0114734A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control valve
- stroke
- hydraulic
- piezo actuator
- phase
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000009365 direct transmission Effects 0.000 claims description 6
- 239000000446 fuel Substances 0.000 description 12
- 230000008859 change Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
- F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger 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
- F02M2200/70—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 invention relates to an injection system with a piezo actuator, a hydraulic translator and a control valve, the stroke of the piezo actuator being transferable to the control valve via a hydraulic medium in the hydraulic translator during continuous operation of the injection system.
- the invention further relates to a method for operating an injection system.
- An injection system also referred to below as a piezo injector, according to the type specified above is used in particular with diesel accumulator injection systems.
- pressure generation and injection are decoupled.
- the injection pressure of approx. 120 to 1600 bar is generated independently of the engine speed and the injection quantity and is available for injection in the "Rail” - the fuel accumulator.
- Injection timing and injection quantity are calculated in the electronic control unit and implemented by the injector on each engine cylinder.
- the injector has the task of setting the start of injection and the injection quantity.
- the control of the injector via a solenoid valve is known.
- solenoid valves can generate a sufficiently large valve lift for using the solenoid valve as a control valve
- additional measures must be taken when controlling an injector with a piezo element. The reason for this is that only a very small stroke can be generated with a piezo element, which stroke is in the per mill range with respect to the length of the piezo element. This small stroke must be transformed for the actuation of the control valve during the continuous operation of the injector.
- a hydraulic translator is used for this purpose.
- FIG. 3 shows a control valve of the prior art for a piezo actuator.
- the stroke of a piezo element, not shown, is transmitted to a control valve 110 via a hydraulic translator. This way, a
- Valve stroke 112 is provided, which is sufficient to move the control valve 110 between a first valve seat 114 and a second valve seat 116 back and forth.
- the valve control chamber 118 is arranged below the control valve 110.
- a fuel inlet 122 connects to this valve control chamber 118 via an inlet throttle 120.
- the control chamber 118 is connected to the control valve 110 via an outlet throttle 124.
- a push rod 126 extends into the control chamber 118, via which the force is transmitted to the injector, not shown.
- the inlet throttle 120 and the outlet throttle 124 serve on the one hand to determine the opening behavior of the nozzle needle via their relative flow rates.
- the flow restrictor 124 also serves to return a leakage quantity of fuel from the valve control 118 into the cavity above it and via the fuel return 128 to a fuel tank.
- the inlet throttle 120 prevents the pressure in the control chamber 118 from immediately completely equalizing and adapting to the high pressure in the common rail, because only a decrease in pressure enables the nozzle needle to be opened by pulling back the push rod 126.
- valve control can also be implemented with just one valve seat.
- the piezo element must then be excited, for example, by double-frequency voltage pulses.
- the injection system according to the invention builds on the prior art in an advantageous manner in that the piezo actuator and the components of the hydraulic translator are arranged with respect to the control valve so that at least part of the stroke of the piezo actuator directly on the Control valve is transferable.
- the control valve can thus open due to the stroke of the piezo element without there being a system pressure from the outset. As soon as the control valve opens due to the direct action of the piezo actuator, the pressure in the common rail fills the system area
- Fuel, and the piezo injector is ready for continuous operation.
- the system can therefore ensure a system pressure supply at any time regardless of environmental influences, such as excessive heat or long periods of inactivity of the engine. It is surprising that direct, that is to say non-hydraulic, power transmission from the piezo element to the control valve is possible at different temperatures, since the piezo element changes its length depending on the temperature. In the systems of the prior art, this was not a fundamental problem, since the power was transmitted only by hydraulic means anyway. But now that the relative position between the piezo element and the control valve is important, the temperature dependence of the piezo length seems to pose a fundamental problem.
- the change in length of the piezo element can be at least almost compensated for precisely by changing the lifting capacity.
- the length of the piezo element has a negative temperature coefficient. In other words: the piezo element is shorter at high temperatures than at low temperatures.
- the lifting capacity of the piezo element increases at high temperatures, which, with a suitable choice of any other marginal parameters, can compensate for the shortening of the length.
- At low temperatures almost the entire stroke of the piezo element could be converted into a stroke of the control valve if the large length of the piezo element leads to a direct or almost direct contact of the elements within the hydraulic Translator is available.
- the hydraulic translator preferably has a first translator piston which can be acted upon by a stop of the piezo actuator. In this way, a direct power transmission from the piezo actuator to the hydraulic translator takes place, which can then, depending on the operating state, be transferred hydraulically or directly to the control valve.
- the hydraulic booster has a second booster piston, which can be acted upon by the first booster piston.
- the invention consequently has a hydraulic translator with at least two translator pistons, which can interact both via a hydraulic medium and directly. The basic idea of the invention is thus implemented in an elegant manner.
- Hydraulic medium is preferably present between the first and the second booster piston at least during the continuous operation. In this way it is ensured that the stroke of the piezo actuator by switching the hydraulic translator into a sufficient stroke of the
- Control valve is translated. This stroke must be so large that a sufficient pressure drop is generated in the control room and the injector can open.
- the direct transmission of the stroke of the piezo actuator to the control valve there is preferably direct contact between the first and the second booster piston.
- a direct contact between the booster pistons of the hydraulic booster is used in the direct power transmission. This direct contact can be implemented over a wide temperature range, since the special temperature behavior of the piezo element has direct effects on the relative positions of the booster pistons.
- the direct transmission of the stroke of the piezo actuator to the control valve opens it to a lesser extent than in the hydraulic transmission during continuous operation.
- a slight opening of the control valve due to the direct power transmission is sufficient to ensure that the system area is filled with fuel. Consequently, after this filling, the prerequisite for hydraulic operation of the control valve is met.
- the direct transmission of the stroke of the piezo actuator to the control valve opens a gap in the range of approximately 3-5 ⁇ m. Such a gap is sufficient to ensure that the coupler space of the translator is filled. On the other hand, sufficient throttling is provided to prevent inadvertent injection when the engine is started.
- a pressure maintaining valve is preferably provided for setting a desired system pressure. This is able, after filling the system area with fuel, which can be done in a few milliseconds to set the desired system pressure.
- the invention advantageously provides a method for operating a piezo injector with a piezo actuator, a hydraulic translator and a control valve, in which the piezo actuator is electrically excited and caused to move, the stroke is transmitted directly to a control valve in a first phase , the stroke is transferred hydraulically to a control valve in a second phase and the control valve is opened by the stroke.
- the method thus uses two fundamentally different principles for opening the control valve in a useful manner. Even when the coupler space is empty, that is to say in a coupler space in which there is no hydraulic medium, the control valve of the piezo injector can be opened by direct mechanical contact by exciting the piezo actuator.
- Such direct mechanical contact can be achieved over a wide temperature range due to the special temperature behavior of the piezo element with regard to the temperature coefficient and the temperature dependence of the stroke.
- the system area can be filled with hydraulic medium, so that subsequently, in a second phase, hydraulic power transmission can take place.
- the hydraulic power transmission results in a displacement, so that the stroke of the piezo actuator is converted into a stroke which is sufficient to open the injection nozzle.
- the stroke opens the control valve less in the first phase than in the second phase.
- direct power transmission and hydraulic Power transmission can additionally ensure the slight opening of the control valve in the first phase, that a corresponding throttling on the control valve prevents fuel being injected when the engine is started.
- control valve opens in the first phase in the range of about 3-5 ⁇ m. This opening is sufficient to quickly fill the system area with fuel; At the same time, a useful throttling is made available. Overall, the leakage rate of the system is reduced compared to the use of a constant throttle, which leads to an advantageously lower power requirement of the high-pressure pump.
- the method according to the invention is particularly advantageous when the first phase is the start phase and the second phase is the phase of continuous operation. If the engine is hot and the outside temperature is high, the hydraulic medium can evaporate from the hydraulic booster. If the vehicle is now to be started again, it is necessary in conventional systems to provide hydraulic medium by increasing the output of the high-pressure pump. If, however, it is possible to transfer the stroke of the piezo actuator directly to the control valve in the start-up phase, an integrated system pressure supply is implemented and the system is prepared for continuous hydraulic operation.
- a system pressure is preferably set by a pressure maintaining valve after the start phase.
- the invention is based on the surprising finding that an integrated system supply can be implemented by utilizing the temperature behavior of a piezo element.
- the system pressure range is filled each time the system is started, so that effects of environmental influences, such as temperature, on the starting behavior are avoided.
- the amount of leakage is significantly reduced compared to a control valve with a constant throttle, which means that the high-pressure pump of the common rail system has a lower power requirement. Due to the possibility of the leakage quantity in the injector being discharged without pressure, the use of conventional leakage hoses is possible.
- FIG. 1 is a highly schematic sectional illustration of a device according to the invention, FIG. 1 a showing a first operating state and FIG. 1 b showing a second operating state.
- FIG. 2 shows a diagram for explaining the properties of a piezo element.
- Figure 3 shows a device of the prior art. Description of the exemplary embodiment
- Figure la shows a section of a piezo injector with a piezo actuator 10, a hydraulic translator 12 and a control valve 14.
- a stop 16 is provided on the piezo actuator 10, which acts on a first booster piston 18 when the piezo actuator 10 is activated.
- the first booster piston 18 interacts with a second booster piston 20, so that the control valve 14 can thereby be opened.
- the first booster piston 18 is in direct mechanical contact with the second booster piston 20.
- the stroke of the piezo actuator 10 is thus transmitted directly to the control valve 14, that is to say without any hydraulic path translation.
- the figure indicates that the control valve 14 is open by an amount ⁇ h.
- FIG. 1b shows another state of the device according to the invention, the same elements being identified with identical reference numerals.
- the control valve 14 is shown in the same state as in FIG.
- This length difference ⁇ l is based on the fact that a condition at a higher temperature, for example at 120 ° C., is shown in FIG. 1b than in FIG.
- the negative mentioned The temperature coefficient of the piezo element consequently leads to the retraction of the first booster piston 18.
- the lifting capacity of the piezo actuator 10 is greater at the high temperature than at the low temperature. If there is no hydraulic medium in the space between the first
- the interplay between the length change and the lifting capacity of the piezo actuator can be better illustrated on the basis of FIG.
- the stroke of the piezo actuator is shown without hydraulic translation on the left vertical axis.
- the length change ⁇ l or the temperature expansion of the piezo actuator is plotted on the right vertical axis.
- Both the stroke h and the length change ⁇ l are shown as a function of the temperature, which is plotted on the horizontal axis.
- the curve that connects the open rectangles belongs to the stroke of the piezo actuator 10.
- the curve that connects the points belongs to the length change ⁇ l.
- the piezo actuator has expanded by an amount which is, for example, slightly smaller than 25 ⁇ m.
- the lifting capacity of the piezo actuator is approximately 25 ⁇ m compared to approximately 50 ⁇ m at 120 ° C. Due to the said change in length ⁇ l at the low temperature of -40 ° C., the reduced lifting capacity is still sufficient to lift the control valve 14 out of the valve seat by a sufficient amount ⁇ h.
- the increased lifting capacity of approximately 50 ⁇ m ensures that the control valve 14 opens sufficiently.
- the diagram according to FIG. 2 shows the interplay between stroke h and temperature expansion ⁇ l only schematically.
- the actual length changes ⁇ l and the stroke h sometimes have to be finely coordinated.
- the opening ⁇ h of the control valve 14 is always large enough for direct power transmission in order to allow the system to be filled quickly with fuel.
- the opening ⁇ h must not be too large, so that the control valve 14 advantageously has a throttling effect. This throttling effect may have to be matched to the throttling effect of an inlet throttle (see FIG. 3 for the state of the art).
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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)
- Control And Safety Of Cranes (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00956132T ATE281599T1 (de) | 1999-08-20 | 2000-08-10 | Einspritzsystem und verfahren zum betreiben eines einspritzsystems |
JP2001518582A JP2003507654A (ja) | 1999-08-20 | 2000-08-10 | 噴射システムおよび噴射システムを運転するための方法 |
KR1020027002131A KR20020023422A (ko) | 1999-08-20 | 2000-08-10 | 분사 시스템 및 분사 시스템 작동 방법 |
EP00956132A EP1210516B1 (de) | 1999-08-20 | 2000-08-10 | Einspritzsystem und verfahren zum betreiben eines einspritzsystems |
DE50008530T DE50008530D1 (de) | 1999-08-20 | 2000-08-10 | Einspritzsystem und verfahren zum betreiben eines einspritzsystems |
US10/049,943 US6588678B1 (en) | 1999-08-20 | 2000-08-10 | Injection system and method for operating an injection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939520A DE19939520C2 (de) | 1999-08-20 | 1999-08-20 | Einspritzsystem und Verfahren zum Betreiben eines Einspritzsystems |
DE19939520.9 | 1999-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001014734A1 true WO2001014734A1 (de) | 2001-03-01 |
Family
ID=7919028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/002680 WO2001014734A1 (de) | 1999-08-20 | 2000-08-10 | Einspritzsystem und verfahren zum betreiben eines einspritzsystems |
Country Status (8)
Country | Link |
---|---|
US (1) | US6588678B1 (de) |
EP (1) | EP1210516B1 (de) |
JP (1) | JP2003507654A (de) |
KR (1) | KR20020023422A (de) |
AT (1) | ATE281599T1 (de) |
CZ (1) | CZ2002609A3 (de) |
DE (2) | DE19939520C2 (de) |
WO (1) | WO2001014734A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003081020A1 (de) * | 2002-03-27 | 2003-10-02 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004017303A1 (de) * | 2004-04-08 | 2005-10-27 | Robert Bosch Gmbh | Einspritzdüse |
DE102004027824A1 (de) * | 2004-06-08 | 2006-01-05 | Robert Bosch Gmbh | Kraftstoffinjektor mit variabler Aktorübersetzung |
JP4079144B2 (ja) * | 2004-12-20 | 2008-04-23 | 株式会社豊田中央研究所 | 燃料噴射弁 |
US8500036B2 (en) * | 2010-05-07 | 2013-08-06 | Caterpillar Inc. | Hydraulically amplified mechanical coupling |
DE102014211334B3 (de) * | 2014-06-13 | 2015-08-27 | Continental Automotive Gmbh | Verfahren zur Charakterisierung eines hydraulischen Koppelelementes eines Piezo-Injektors |
US11666944B1 (en) * | 2020-05-28 | 2023-06-06 | Amazon Technologies, Inc. | Detection of overfilled containers in sortation systems |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0477400A1 (de) * | 1990-09-25 | 1992-04-01 | Siemens Aktiengesellschaft | Anordnung für einen in Hubrichtung wirkenden adaptiven, mechanischen Toleranzausgleich für den Wegtransformator eines piezoelektrischen Aktors |
EP0816670A1 (de) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Piezoelektrisch gesteuertes Einspritzventil mit hydraulischer Vergrösserung des Hubs |
DE19726481A1 (de) * | 1997-06-21 | 1998-12-24 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4995587A (en) * | 1989-11-03 | 1991-02-26 | Martin Marietta Corporation | Motion amplifier employing a dual piston arrangement |
DE19500706C2 (de) * | 1995-01-12 | 2003-09-25 | Bosch Gmbh Robert | Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen |
DE19652801C1 (de) * | 1996-12-18 | 1998-04-23 | Siemens Ag | Verfahren und Vorrichtung zum Ansteuern wenigstens eines kapazitiven Stellgliedes |
DE19732802A1 (de) * | 1997-07-30 | 1999-02-04 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
DE19743669A1 (de) * | 1997-10-02 | 1999-04-08 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19746143A1 (de) * | 1997-10-18 | 1999-04-22 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19807903C2 (de) * | 1998-02-25 | 2001-11-29 | Siemens Ag | Vorrichtung und Verfahren zur Kraftübertragung |
DE19843534A1 (de) * | 1998-09-23 | 2000-03-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
EP1046809B1 (de) * | 1999-04-20 | 2005-08-10 | Siemens Aktiengesellschaft | Fluiddosiervorrichtung |
DE19940300A1 (de) * | 1999-08-25 | 2001-03-01 | Bosch Gmbh Robert | Steuerventil für einen Injektor |
DE19946841A1 (de) * | 1999-09-30 | 2001-05-03 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19946828C1 (de) * | 1999-09-30 | 2001-07-12 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19946827C1 (de) * | 1999-09-30 | 2001-06-21 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
-
1999
- 1999-08-20 DE DE19939520A patent/DE19939520C2/de not_active Expired - Fee Related
-
2000
- 2000-08-10 EP EP00956132A patent/EP1210516B1/de not_active Expired - Lifetime
- 2000-08-10 DE DE50008530T patent/DE50008530D1/de not_active Expired - Lifetime
- 2000-08-10 US US10/049,943 patent/US6588678B1/en not_active Expired - Fee Related
- 2000-08-10 JP JP2001518582A patent/JP2003507654A/ja active Pending
- 2000-08-10 AT AT00956132T patent/ATE281599T1/de not_active IP Right Cessation
- 2000-08-10 CZ CZ2002609A patent/CZ2002609A3/cs unknown
- 2000-08-10 WO PCT/DE2000/002680 patent/WO2001014734A1/de not_active Application Discontinuation
- 2000-08-10 KR KR1020027002131A patent/KR20020023422A/ko not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0477400A1 (de) * | 1990-09-25 | 1992-04-01 | Siemens Aktiengesellschaft | Anordnung für einen in Hubrichtung wirkenden adaptiven, mechanischen Toleranzausgleich für den Wegtransformator eines piezoelektrischen Aktors |
EP0816670A1 (de) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Piezoelektrisch gesteuertes Einspritzventil mit hydraulischer Vergrösserung des Hubs |
DE19726481A1 (de) * | 1997-06-21 | 1998-12-24 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003081020A1 (de) * | 2002-03-27 | 2003-10-02 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
DE19939520A1 (de) | 2001-03-01 |
ATE281599T1 (de) | 2004-11-15 |
JP2003507654A (ja) | 2003-02-25 |
DE50008530D1 (de) | 2004-12-09 |
EP1210516B1 (de) | 2004-11-03 |
KR20020023422A (ko) | 2002-03-28 |
DE19939520C2 (de) | 2001-06-07 |
US6588678B1 (en) | 2003-07-08 |
EP1210516A1 (de) | 2002-06-05 |
CZ2002609A3 (cs) | 2003-06-18 |
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