EP0970305A1 - Injection valve with control valve - Google Patents
Injection valve with control valveInfo
- Publication number
- EP0970305A1 EP0970305A1 EP98966221A EP98966221A EP0970305A1 EP 0970305 A1 EP0970305 A1 EP 0970305A1 EP 98966221 A EP98966221 A EP 98966221A EP 98966221 A EP98966221 A EP 98966221A EP 0970305 A1 EP0970305 A1 EP 0970305A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closing member
- control chamber
- control
- valve rod
- valve
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000000446 fuel Substances 0.000 abstract description 27
- 230000006835 compression Effects 0.000 description 15
- 238000007906 compression Methods 0.000 description 15
- 239000002828 fuel tank Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003466 welding 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
Definitions
- the invention relates to an injection valve with a control valve according to the preamble of patent claim 1
- Injectors with a control valve are used, for example, in a common rail injection system to control the pressure in a control chamber, the pressure in the control chamber acting via a control piston on an injection needle which, depending on the pressure, rises from a valve seat, and thereby fuel is injected into an internal combustion engine.
- an injection valve with a control valve is known as the closest prior art, which has a closing element which is assigned to a valve seat and which is connected to a piston which is operatively connected to an actuator.
- the piston is partially enclosed by an annular spring holder, with which a spring element is operatively connected so that the closing member over the piston is pressed onto the valve seat from the low pressure side.
- the closing element and the valve seat are attached on the high pressure side.
- the object of the invention is to provide an injection valve with a control valve which reliably closes the outlet throttle of the control chamber.
- An advantage of the invention resides in the fact that the closing element of the control valve is arranged on the high pressure side and is pressed against the valve seat by the pressure in the control chamber. Another advantage is that the
- Closing member the drain is securely closed even if the biasing means is damaged.
- the closing member is connected via a valve tappet with a small diameter to an actuator piston which has a larger diameter.
- the valve lifter is guided through a drain hole that has a correspondingly small diameter.
- the actuator piston has great rigidity, so that the closing member can be moved precisely and quickly by an actuator that controls the actuator piston.
- the drain hole has a small diameter, the closing member can also be made correspondingly small, so that only a small force is required to move the closing member against the pressure in the control chamber and thereby to open or close the drain hole.
- Figure 1 A first embodiment of the control valve
- Figure 2 A second embodiment of the control valve
- Figure 1 shows schematically a part of an injection valve in which a control valve is arranged. For the sake of simplicity, only the control valve and not the entire injection valve is shown. The mode of operation and the construction of a corresponding injection valve is described for example in EP 0 604 915 AI.
- the control valve has a control chamber 1, which is connected to a fuel inlet 3 via an inlet throttle 4.
- the control chamber 1 is delimited by a control piston 2 which is movably arranged in a piston bore 35 and which is connected to an injection needle.
- the control chamber 1 has a drain hole 5 which is guided to a second recess 8 which is connected to the fuel tank via a drain.
- the second recess 8 merges upwards into a wider guide bore 34.
- a first closing element 10 is arranged in the control chamber 1 and merges into a valve rod 11 which is guided through the drain hole 5 into the second recess 8.
- a spring plate 13 is introduced, which extends into the guide bore 35.
- the spring plate 13 has a U-shape, which is closed with a base plate 16.
- the base plate 16 is assigned to the drain hole 5.
- the valve rod 11 is guided in the second recess 8 through a central bore 27 in the base plate 16.
- the valve rod 11 is preferably flush with the top of the base plate 16 and is preferably connected to the base plate 16 in this area via a weld seam 17.
- the base plate 16 merges upwards into a sleeve 28 which has an outwardly angled stop ring 29 in the upper end region.
- the second recess 8 and the first recess 7, which forms part of the control chamber 1, are preferably introduced into a valve plate 6.
- the valve plate 6 is non-positively connected to the housing 36 of the injection valve.
- a spring element preferably a compression spring 14 is introduced under pretension, so that in the rest position the first closing member 10 is pressed upwards in the direction of the drain hole 5 against an assigned, first sealing seat 25 .
- the compression spring other spring means such as a disc spring can be used.
- the first sealing seat 25 is designed as part of the wall surface of the control chamber in the entrance area to the drain hole 5.
- the drain hole 5 preferably represents an outlet throttle. In a further development of the invention, however, the outlet throttle can also be formed after the drain hole.
- the drain hole 5 is closed by the first closing member 10 in the rest position by the compression spring 14.
- this exemplary embodiment offers the advantage that in the event of a failure of the compression spring 14, the spring plate 13 or the valve rod 11, the first closing member 10 is pressed against the first sealing seat 25 by the pressure prevailing in the control chamber 1 and thereby the first closing member 10 closes the first sealing seat 25 self-locking.
- the base plate 16, the sleeve 28 and the stop ring 29 form the spring plate 13, in the cylindrical cavity of which an actuator piston 12 is inserted, the end face of which te rests on the base plate 16.
- the actuator piston 12 is movably arranged in the spring plate 13 and is operatively connected to an actuator, for example a piezoelectric actuator, which moves the actuator piston.
- the first sealing seat 25 is preferably designed as a conical seat.
- the first closing member 10 is partially spherical, the partial spherical shape being associated with the first sealing seat 25.
- the partial spherical shape merges with the cylindrical shape of the valve rod 11 in the middle at the upper apex.
- the partially spherical outer surface of the first closing member 10 is adapted to the shape of the first sealing seat 25.
- the flow rate that flows through the drain hole 5 is determined by the annular drain channel 30, which results from the drain hole 5 and the rod 11.
- the outlet channel 30 is preferably designed in such a way that the outlet channel 30 acts as an outlet throttle.
- the small diameter of the drain hole 5 now has the disadvantage that the valve rod, which is guided through the drain hole, has an even smaller diameter. Due to the small diameter, the valve stem has 10 low rigidity. This is disadvantageous for fast and precise control of the first closing element 10.
- the outlet throttle 5 it is therefore advantageous to design the outlet throttle 5 as short as possible so that the valve rod 11 can be made as short as possible.
- the actuator piston 12 is located outside the control chamber in a second recess 8 which is connected to a guide bore 35.
- the actuator piston 12 can be designed with a larger diameter, so that the elasticity of the actuator piston 12 is lower than that of the valve rod 11. Since the actuator piston is harder than the valve rod 11, the length of the actuator piston 12 is for the adjustment of the elastic Properties of minor importance.
- a further optimization of the control valve is achieved in that the first closing member 10 is adapted to the shape of the control chamber 1 in such a way that the control volume in the control chamber 1, which is not filled by the first closing member 10, is as small as possible. This enables the control chamber to be emptied and filled quickly, thereby minimizing the switching times in which pressure is built up or reduced in the control chamber. This minimizes the switching times with which the control piston 2 and thus the injection needle are moved.
- the control chamber preferably has a cylindrical shape which changes into a conical shape in the upper region and which thus tapers in the direction of the centrally arranged drain hole 5. The conical shape represents the first sealing seat 25.
- the first closing member 10 is preferably part-spherical, the diameter of the part-spherical shape being somewhat smaller than the diameter of the cylindrical shape of the control chamber 1.
- the flat cutting surface on the underside of the first closing member 10 is parallel to the flat end surface arranged of the control piston 1 and facing the end face of the control piston 1.
- the control chamber 1 is preferably of such a length that when the first closing member 10 is fully open, that is to say when the first closing member 10 is maximally deflected, the closing member 10 just does not abut the control piston 2 so that the control volume is kept as small as possible. This adjustment can be carried out precisely since the cut surface of the first closing member and the end surface of the control piston are arranged flat and parallel to one another.
- the operation of the control valve according to FIG. 1 is as follows: In the rest position, the first closing member 10 is pressed by the compression spring 14 against the first sealing seat 25, so that the drain hole 5 is closed.
- the control chamber 1 is thus connected to the fuel inlet 3 only via the inlet throttle 4. In this state, there is the same fuel pressure in the control chamber 1 as in the fuel inlet 3.
- the control piston 2 is acted upon by the high fuel pressure of the fuel inlet 3 and is pressed down with the corresponding force.
- the control piston 2 in turn presses an injection needle onto an associated sealing seat, so that no fuel is injected.
- the actuator piston 12 If, in the working position, the actuator piston 12 is moved by the associated actuator in the direction of the drain hole 5, the first closing member 10 is lifted from the first sealing seat 25 against the biasing force of the compression spring 14 and with the pressure surface against the pressure in the control chamber 1. As a result, in the working position, the control chamber 1 is connected via the drain hole 5 to the drain which leads to the fuel tank.
- the actuator piston 12 is moved upwards again into the rest position by the associated actuator, so that the first closing member 10 is pressed essentially by the compression spring 14 against the first sealing seat 25.
- the pressure in the control chamber 1 at this time is too low to make a noticeable contribution to the closing of the discharge throttle 5.
- the drain hole 5 is closed and in the control chamber 1 the fuel pressure that is present in the fuel inlet 3 is restored after a while since fuel flows into the control chamber 1 via the inlet throttle 4.
- the control piston is moved down again by the resulting high pressure, so that the injection needle is again pressed onto the associated sealing seat and thus the injection of fuel is interrupted.
- the fuel pressure drops when the drain hole 5 is open, because more fuel flows off via the drain hole 5 than flows in via the inlet throttle 4.
- the drain hole 5 is dimensioned accordingly and preferably represents an outlet throttle.
- control volume in the control chamber 1 is small, and thus the drain hole 5 can be opened and closed more quickly since only the first closing member 10 is arranged in the control chamber 1.
- Control volume is the volume of control chamber 1 that can be filled with fuel. The larger the control volume, the slower the drain hole 5 can be opened or closed.
- the compression spring 14, which is relatively large due to the large preload required, is preferably outside the control chamber 1 and thus does not influence the control volume of the control chamber 1.
- the first closing member is essentially spherical. This offers the advantage that the spherical closing element adjusts itself automatically to a conical first sealing seat when the first sealing seat 25 is closed due to the spherical shape.
- the first closing member 10 can also preferably be conical in the sealing area, the conical shape of the first closing member 10 being symmetrically associated with the conical shape of the first sealing seat 25. In this embodiment, however, the first closing member 25 should be guided centrally and symmetrically to the first sealing seat 25, so that the first sealing seat 25 is closed precisely.
- the dimensioning of the drain hole 5 or the drain channel 30 as an outlet throttle is particularly advantageous, as a result of which an additional outlet throttle is saved, and the outlet throttle directly adjacent to the control chamber, whereby a low control volume is achieved.
- a drainage recess 37 is preferably provided on the underside of the base plate 16, so that fuel can flow away from the drain hole 5 even when the base plate 16 is in place, since the base plate 16 rests on the valve plate 6 in the working position. Due to the sleeve shape of the spring plate 13, the actuator piston 12 bears directly on the valve rod 11, the valve rod 11 being as short as possible and a relatively large compression spring 14 can nevertheless be used. This ensures a large contact pressure in the rest position for securely sealing the first sealing seat 25.
- An advantageous embodiment consists in providing a preassembled and preset control valve unit, which has the throttle plate 6 with the drain hole 5 and with the first sealing seat 25, the first closing member 10 with the valve rod 11, which is guided through the drain hole 5, the spring plate 13 , with which the valve rod 11 is connected, and has the spring element 14, which is introduced biased between the spring plate 13 and the throttle plate 6.
- the throttle plate 6 preferably has the first recess 7, which represents at least part of the control chamber 1.
- a second recess 8 for receiving the spring plate 13 can also be incorporated in the throttle plate 6.
- the control valve unit has the advantage that the individual components are preassembled and that the maximum stroke of the first closing member 10 is adjusted.
- the spring plate 13 is pressed from one side against the spring force of the spring element 14 against the throttle plate 6 and the first closing member 10 from the other side pushed with the valve rod 11 through the drain hole 5 into the hole 27 of the base plate 16.
- the valve rod 11 is welded to the base plate 16. This is preferably done using laser welding. The laser beam is incident on the open U-shape of the spring plate 13 and welds the valve rod 11 on the top of the base plate 16 with a weld 17 to the base plate 16.
- the fully assembled control valve unit is completely inserted into the housing 36 when the injection valve is assembled.
- the control valve unit is preferably firmly connected to the housing 36 via the throttle plate 6 by means of appropriate clamping means, such as a union nut.
- FIG. 2 schematically shows an injection valve with a second embodiment of the control valve, in which the main differences compared to FIG. 1 are the shape of the closing element, the shape of the spring plate and an outlet throttle 23.
- a second closing member 19 is assigned to a second sealing seat 26, the second sealing seat 26 and the assigned second sealing surface 31 of the second
- Closing member 19 are formed as plane-parallel surfaces which are assigned to one another.
- the second closing member 19 essentially has the shape of a T-piece, which merges into a second rod 20, which passes through the drain hole 5 and through a second hole 32 of a second spring plate
- the second rod 20 is connected to the second spring plate 21 via a second welded connection 24.
- the second spring plate is in the essentially cylindrical and has a second stop ring 33 in the upper end region.
- a compression spring 14 is clamped between the second stop ring 33 and the valve plate 6 and biases the second closing member 19 upward against the second sealing seat 26.
- a second actuator piston 22 rests on the top of the second spring plate 21.
- the second actuator piston 22 and the second spring plate 21 are guided in a guide bore 34 of the injection valve.
- a drain line leads from the guide bore 34 and is led to the fuel tank via an outlet throttle 23.
- a discharge duct 37 is provided in the second spring plate 21 in the lower region, which is guided from the mouth region of the drain hole 5 to the edge region in which the compression spring 14 is arranged.
- the outlet throttle 23 the outlet bore 5 or the outlet channel 30 can also be designed as an outlet throttle.
- the arrangement according to FIG. 2 functions as follows: In the rest position, the second closing member 19 is pressed against the second sealing seat 26 by the compression spring 14 with the second sealing surface 31 and thus the drain hole 5 is closed. In the rest position, the control chamber 1 therefore has the same fuel pressure that is also present in the fuel inlet 3. Consequently, the control piston 2 is subjected to a correspondingly high pressure.
- the second closing member 19 releases the drain channel 30, in which the drain hole 5 results from the space which is not occupied by the second rod 20.
- the discharge line and the outlet throttle 23 to the fuel tank. Since the inlet throttle 4 has a smaller cross section than the outlet throttle 23, the fuel pressure in the control chamber 1 drops.
- the outlet duct 30 is designed with such a large flow cross section that the throttle function is represented by the outlet throttle 23. As a result, the force acting on the control piston 2 decreases.
- the outlet throttle 23 can be omitted and the function of the outlet throttle 23 is achieved by appropriately dimensioning the outlet duct 30.
- a control valve unit can also advantageously be used, which consists of the throttle plate 6 with the second closing element 19, which is preloaded via the second spring plate 21 and a spring means 14 and can be seen by determining the distance between them the second closing member 19 and the second spring plate 21 is set to a defined maximum stroke.
- the invention was described using the example of a control chamber with an inlet and an outlet throttle, but the invention is applicable to any type of valve. That too is Application is not limited to an injection valve, but can be used in all technical areas.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19757656 | 1997-12-23 | ||
DE19757656 | 1997-12-23 | ||
PCT/DE1998/003746 WO1999034111A1 (en) | 1997-12-23 | 1998-12-18 | Injection valve with control valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0970305A1 true EP0970305A1 (en) | 2000-01-12 |
EP0970305B1 EP0970305B1 (en) | 2003-05-21 |
Family
ID=7853253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98966221A Expired - Lifetime EP0970305B1 (en) | 1997-12-23 | 1998-12-18 | Injection valve with control valve |
Country Status (4)
Country | Link |
---|---|
US (1) | US6168132B1 (en) |
EP (1) | EP0970305B1 (en) |
DE (1) | DE59808465D1 (en) |
WO (1) | WO1999034111A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006029917A1 (en) * | 2004-09-17 | 2006-03-23 | Robert Bosch Gmbh | Fuel injection device |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19937677C2 (en) * | 1999-08-10 | 2003-06-26 | Siemens Ag | Injector with improved sealing surface arrangement |
DE19939419A1 (en) * | 1999-08-20 | 2001-03-01 | Bosch Gmbh Robert | Fuel injector |
DE19945314A1 (en) * | 1999-09-22 | 2001-04-05 | Bosch Gmbh Robert | Common rail injector |
DE10003863B4 (en) * | 2000-01-28 | 2004-11-18 | Robert Bosch Gmbh | injection |
AUPQ708200A0 (en) * | 2000-04-20 | 2000-05-18 | Orbital Engine Company (Australia) Proprietary Limited | Deposit control in fuel injector nozzles |
US6647966B2 (en) * | 2001-09-21 | 2003-11-18 | Caterpillar Inc | Common rail fuel injection system and fuel injector for same |
DE10148874C2 (en) * | 2001-10-04 | 2003-12-24 | Siemens Ag | Nozzle device, in particular for fuel injection |
DE10149286C2 (en) | 2001-10-05 | 2003-12-11 | Siemens Ag | Nozzle device, in particular for fuel injection |
DE10160263A1 (en) * | 2001-12-07 | 2003-06-18 | Bosch Gmbh Robert | Fuel injection device for an internal combustion engine |
US6837221B2 (en) | 2001-12-11 | 2005-01-04 | Cummins Inc. | Fuel injector with feedback control |
US6647964B1 (en) * | 2002-06-14 | 2003-11-18 | Caterpillar Inc | End of injection pressure reduction |
GB0215490D0 (en) * | 2002-07-04 | 2002-08-14 | Delphi Tech Inc | Control valve arrangement |
DE102005029472B4 (en) * | 2005-06-24 | 2009-09-17 | Continental Automotive Gmbh | Injection valve for injecting diesel fuel into an internal combustion engine |
DE102006057425A1 (en) * | 2006-05-23 | 2007-11-29 | Robert Bosch Gmbh | Apparatus for regeneration, for temperature application and / or for thermal management, associated injection valve and method |
DE102006049885A1 (en) * | 2006-10-23 | 2008-04-24 | Robert Bosch Gmbh | Fuel injector i.e. common rail injector, for internal-combustion engine, has valve seat designed as flat seat with even valve seat surface, and casing resting on seat surface with front-sided circulating edge when control valve is closed |
DE102007042466B3 (en) | 2007-09-06 | 2009-04-09 | Continental Automotive Gmbh | Injection system with reduced switching leakage and method of manufacturing an injection system |
DE102008032385B4 (en) * | 2008-07-09 | 2018-03-29 | Audi Ag | High-pressure injection arrangement for a direct-injection internal combustion engine |
DE102008040637A1 (en) * | 2008-07-23 | 2010-01-28 | Robert Bosch Gmbh | Fuel injection valve device |
DE102012212266B4 (en) * | 2012-07-13 | 2015-01-22 | Continental Automotive Gmbh | fluid injector |
DE102012212264B4 (en) | 2012-07-13 | 2014-02-13 | Continental Automotive Gmbh | Method for producing a solid state actuator |
EP2975257B1 (en) * | 2014-07-18 | 2018-01-10 | Continental Automotive GmbH | Control unit to control a valve pin of a fuel injector and fuel injector |
JP2019148192A (en) * | 2018-02-26 | 2019-09-05 | 株式会社Soken | Fuel injection device |
IT201900001413A1 (en) * | 2019-01-31 | 2020-07-31 | Bosch Gmbh Robert | INTAKE VALVE FOR A HIGH PRESSURE PUMP SUPPLYING FUEL TO AN INTERNAL COMBUSTION ENGINE AND PUMP INCLUDING THIS VALVE |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4544128A (en) * | 1983-02-24 | 1985-10-01 | Imperial Clevite Inc. | Cartridge solenoid valve with manual override |
JPS6187963A (en) * | 1984-10-08 | 1986-05-06 | Kanesaka Gijutsu Kenkyusho:Kk | Fuel injection device |
JPH01224454A (en) * | 1988-03-04 | 1989-09-07 | Yamaha Motor Co Ltd | High pressure fuel injection device of engine |
JPH0286953A (en) * | 1988-09-21 | 1990-03-27 | Kanesaka Gijutsu Kenkyusho:Kk | Fuel injection valve |
US5271599A (en) * | 1990-09-28 | 1993-12-21 | Kolchinsky Abel E | Modular solenoid valve |
IT1257958B (en) | 1992-12-29 | 1996-02-19 | Mario Ricco | ELECTROMAGNETIC CONTROL DOSING VALVE REGISTRATION DEVICE, FOR A FUEL INJECTOR |
DE4341546A1 (en) * | 1993-12-07 | 1995-06-08 | Bosch Gmbh Robert | Fuel injection device for internal combustion engines |
JPH08158981A (en) * | 1994-12-02 | 1996-06-18 | Nippondenso Co Ltd | Fuel injection device |
US5526791A (en) * | 1995-06-07 | 1996-06-18 | Diesel Technology Company | High-pressure electromagnetic fuel injector |
DE19624001A1 (en) * | 1996-06-15 | 1997-12-18 | Bosch Gmbh Robert | Fuel injection device for internal combustion engines |
US5779149A (en) * | 1996-07-02 | 1998-07-14 | Siemens Automotive Corporation | Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke |
JP3823391B2 (en) | 1996-08-31 | 2006-09-20 | いすゞ自動車株式会社 | Engine fuel injector |
US5875764A (en) * | 1998-05-13 | 1999-03-02 | Siemens Aktiengesellschaft | Apparatus and method for valve control |
-
1998
- 1998-12-18 EP EP98966221A patent/EP0970305B1/en not_active Expired - Lifetime
- 1998-12-18 DE DE59808465T patent/DE59808465D1/en not_active Expired - Lifetime
- 1998-12-18 WO PCT/DE1998/003746 patent/WO1999034111A1/en active IP Right Grant
-
1999
- 1999-08-23 US US09/379,219 patent/US6168132B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9934111A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006029917A1 (en) * | 2004-09-17 | 2006-03-23 | Robert Bosch Gmbh | Fuel injection device |
Also Published As
Publication number | Publication date |
---|---|
WO1999034111A1 (en) | 1999-07-08 |
DE59808465D1 (en) | 2003-06-26 |
EP0970305B1 (en) | 2003-05-21 |
US6168132B1 (en) | 2001-01-02 |
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