EP1970557A2 - Soupape pour injecteurs de carburant - Google Patents

Soupape pour injecteurs de carburant Download PDF

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Publication number
EP1970557A2
EP1970557A2 EP08100935A EP08100935A EP1970557A2 EP 1970557 A2 EP1970557 A2 EP 1970557A2 EP 08100935 A EP08100935 A EP 08100935A EP 08100935 A EP08100935 A EP 08100935A EP 1970557 A2 EP1970557 A2 EP 1970557A2
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injector
valve element
seat
armature assembly
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Withdrawn
Application number
EP08100935A
Other languages
German (de)
English (en)
Other versions
EP1970557A3 (fr
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1970557A2 publication Critical patent/EP1970557A2/fr
Publication of EP1970557A3 publication Critical patent/EP1970557A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves

Definitions

  • DE 196 50 865 A1 describes a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, such as a common rail injection system. About the fuel pressure in the control chamber, a stroke movement of a valve piston is controlled with an injection port of the injection valve is opened or closed.
  • the solenoid valve comprises an electromagnet, a movable armature and a valve member which is moved with the armature and acted upon by a valve closing spring in the closing direction and which cooperates with the valve seat of the solenoid valve and thus controls the fuel drain from the control chamber.
  • the two-part formed anchor comprises an anchor bolt and an armature plate slidably received on the anchor bolt against the force of a return spring in the closing direction of the valve member under the action of its inertial mass, which is secured to the anchor bolt by means of a lock washer and a securing sleeve surrounding it.
  • the locking sleeve and the locking washer are enclosed by the magnetic core, resulting in an increased space requirement and resulting in a higher diameter in the magnetic core. Due to the higher diameter in the magnetic core in turn results in a limitation of the magnetic flux.
  • a valve seat in the valve member in the form of a cone, a long guide surface along the anchor bolt, a guide surface in the armature guide, and a guide surface in the armature plate must be manufactured by the machining process, usually grinding.
  • the quality of the guide of the anchor plate by an indirect guidance over the anchor bolt is relatively low.
  • valve spring exerting a closing force on the anchor bolt introduces lateral force components into the assembly of anchor plate and anchor bolt. Due to the guiding play between the armature guide and the anchor bolt, this leads to a tilting of the anchor bolt in the armature guide. With strong lateral force this tilting can also be present in the upper position of the anchor bolt when energized electromagnet. This part of the previously consuming set armature stroke, i. the movement of the anchor bolt in operation is not fully utilized. This in turn leads to a lower injection quantity of fuel into the combustion chamber of an internal combustion engine. Added to this is the friction of the anchor bolt in the anchor guide, which also influences the movement of the anchor bolt.
  • valve spring has a relatively large distance to the upper end of the armature guide. This creates at the top and at the bottom of the anchor guide very high punctually acting forces on the anchor bolt, which additionally reinforce the friction and thus slow the movement of the anchor bolt.
  • the speed at which the anchor bolt moves i. the opening and closing of the valve element, has a very large influence on the respectively introduced into the combustion chamber of the internal combustion engine fuel quantity.
  • an armature assembly is proposed for a fuel injector actuated by means of a solenoid valve, in which a single or double-switching valve element is integrated.
  • the valve element is designed spherical. Instead of the spherical shape, other design possibilities of the valve element are also conceivable, for example as a slide which covers one or more slide seat edges in the valve body or releases them in accordance with its switching position.
  • the armature assembly proposed according to the invention is made as a "built valve", wherein on the one hand on the spherical valve body by means of a material-locking joining method, such as welding, an anchor plate of the armature assembly can be welded and on the other hand on the spherical shaped valve member, a guide body, which is substantially is cylindrical, can be attached by way of welding.
  • a material-locking joining method such as welding
  • a guide body which is substantially is cylindrical
  • the underlying idea is a very compact anchor assembly included in addition to the anchor plate which is acted upon by a closing spring already contains the valve element in spherical form, via which a trained in the valve body of the switching valve of the solenoid valve fuel injector seat released or can be closed.
  • a "built-valve” which has an armature assembly, which in addition to the spherical in this embodiment valve element on the one hand an anchor bolt and on the other hand has a guide body.
  • armature assembly which in addition to the spherical in this embodiment valve element on the one hand an anchor bolt and on the other hand has a guide body.
  • anchor bolt anchor plate of the armature assembly is attached via a lock washer which forms a stop, which in turn is overlapped by a securing sleeve.
  • the locking sleeve which covers the locking washer on the anchor bolt of the armature assembly, has to a resilient stop.
  • the resilient stop is received in a through hole of the magnetic core of the solenoid valve assembly, which in turn is received in a cavity of the holding body of the fuel injector.
  • the armature assembly of the present invention proposed actuated by a solenoid valve fuel injector is made of several components in the way of a cohesive joining process, such as welding or soldering of individual components.
  • the armature assembly comprises either a valve element which is designed to be single-switching, or a valve element which has a double-switching design is and a first and a second seat within the valve body releases or closes and can be held in an intermediate position between the first and the second seat.
  • valve element can be spherical. If the valve element is spherical, then existing standard parts can be used, so that the manufacturing costs of the inventively proposed anchor assembly can be significantly reduced and also a very compact-building over a solenoid valve to be actuated switching valve is obtained.
  • an intermediate position of the valve element between a first and a second seat can be achieved.
  • this makes it possible to realize smaller pre-injection quantities and, on the other hand, to effect rapid switching of the valve element, the quantity of fuel injected during the main injection phase being achieved in the middle position of the valve element designed as a double-switching valve.
  • the inventively proposed switching valve for actuation by means of a magnet is very compact and represents a fast-switching, force-balanced solution, which can be used in particular "inline".
  • FIG. 1 is a first embodiment of the inventively proposed designed as a built valve armature assembly for actuating a fuel injector.
  • a fuel injector 10 has a holding body 12.
  • the holding body 12 of the fuel injector 10 is connected to a screw 102 with a nozzle retaining nut 22.
  • a nozzle body 20 In the nozzle retaining nut 22, a nozzle body 20, an overlying throttle plate 18 and a lying over this valve body 14 are inserted.
  • the nozzle lock nut 22 is screwed to the screw 102 with an external thread of the holding body 12 of the fuel injector 10.
  • the components mentioned are pressed against each other at their respective contact surfaces to form sealing points and represent the fuel injector 10 in the assembled state. While a preferably needle-shaped injection valve member 24 is received in the nozzle body 20, an actuating member 26 is accommodated in the holding body, which is designed as a solenoid valve.
  • the components of the solenoid valve 26 are located in a cavity 28 of the holding body 12 of the fuel injector 10. By the holding body 12, the valve body 14 and the throttle plate 18 extends a high-pressure inlet 30, which opens into a hydraulic chamber 72 of the nozzle body 20.
  • a system pressure prevails, under which the fuel with which the fuel injector 10 is acted upon via the high-pressure inlet 30 is set.
  • the system pressure in a high-pressure accumulator injection system in a high-pressure accumulator body can be brought to an order of magnitude between 1600 and 2000 bar by a high-pressure pump assigned to it, for example.
  • the system pressure can also be a pressure to which the fuel is brought in the context of a pump-nozzle system (UI concept).
  • a magnetic core 36 having a through hole.
  • a closing spring 34 which acts on a plan side of an armature plate 46 of an armature assembly 44 extends.
  • the passage opening in the magnet core 36 is aligned with a leakage oil outlet 32, which is formed on the low-pressure side in the holding body 12 of the fuel injector 10.
  • a magnetic coil 40 is received, which via an electrical contact 38 can be charged with voltage.
  • the magnet coil 40 is located on an end face 42, ie the underside of the magnetic core 36.
  • the inventively proposed anchor assembly 44 includes the already mentioned anchor plate 46 which is acted upon by the closing spring 34.
  • the anchor plate 44 is at a first joint 74 with a in accordance with the embodiment FIG. 1 Spherical procured valve element 48 integrally connected.
  • the cohesively formed joint 74 between the armature plate 46 and the ball-shaped here valve element 48 may be formed, for example, as a weld or as a solder joint or the like.
  • the integrally formed in the armature assembly 44, here spherically shaped valve member 48 is connected to a further, second also cohesively formed joint 76 with a substantially cylindrical guide body 52 cohesively.
  • the armature assembly 44 of in FIG. 1 illustrated first embodiment of the invention proposed solution essentially comprises the component anchor plate 46, spherical valve element 48 and guided in the valve body 14 guide body 52nd
  • FIG. 1 further shows, the valve element 48 of the switching valve for actuating the in FIG. 1 illustrated fuel injector 10 designed as a simple switching valve.
  • the solution proposed underlying spherical trained valve member 48 releases a first seat 50 or closes.
  • the first seat 50 is formed above an outlet point 58 of a flow channel 56 in the valve body 14 of the Kraftstoffinj ector 10.
  • fuel injector 10 extends below the cylindrically shaped guide body 52 an overflow 54, via the leakage in the low pressure side region, ie the cavity 28 of the holding body 12 is fed.
  • the hydraulic chamber 72 of the nozzle body 20 is a designated by reference numeral 64 control chamber, which is bounded by a control chamber sleeve 66.
  • the control chamber sleeve 66 surrounding the head of the preferably needle-shaped injection valve member 24 is acted upon by a spring 68, which is supported on a collar 70 of the preferably needle-shaped injection valve member 24.
  • the fuel under system pressure flows to the control chamber 64 via the high-pressure inlet 30 with the interposition of an inlet throttle 62.
  • the discharge point 58 in the valve body 14, at which the drain passage 56 opens released and a control amount flows through the outlet throttle 60 from the control chamber 64th via the drainage channel 56, the discharge point 58 on the valve element 48 open standing over in the low-pressure side cavity 28 and from there into the low-pressure leakage oil drain 32nd
  • FIG. 1 illustrated first embodiment of the present invention proposed fuel injector 10 is as follows:
  • the outlet channel 56 is opened and a control quantity from the control chamber 64 flows into the leakage oil outlet 32 via the cavity 28. Due to the pressure relief of the control chamber 64, the end face of the preferably needle-shaped injection valve member 24 moves into the control chamber 64, so that in FIG. 1 not shown, provided at the combustion chamber end of the fuel injector 10 injection openings are opened. As a result, standing under system pressure fuel flowing to the injection ports via the high-pressure line 30, are injected into the combustion chamber of the internal combustion engine.
  • the switching valve shown in the first embodiment of the invention on which the invention is based, with the armature assembly 44 designed as described above, represents a switching lever that can be produced very inexpensively, which can be used in particular in the case of fuel injectors 10 actuated by a solenoid valve.
  • FIG. 2 is a further embodiment of the inventively proposed, preferably be actuated by means of a solenoid valve fuel injector.
  • FIG. 2 shows that in this embodiment, the fuel injector 10, the holding body 12, the valve body 14, the throttle plate 18, the nozzle body 20 and the nozzle retaining nut 22 has.
  • the nozzle retaining nut 22 is joined to the holding body 12 on the screw 102.
  • the introduction of an axial force into the screwed connection of the fuel injector 10, comprising the holding body 12, the valve body 14, the throttle plate 18 and the nozzle body 20 also takes place in the nozzle body in this second embodiment 20 of the fuel injector 10 receives a preferably needle-shaped injection valve member 24.
  • the magnetic coil 40 is inserted, which is energized via the extending through the holding body 12 electrical contact 38.
  • the holding body 12 extends through the holding body 12, both a part of the high-pressure inlet 30 and the leakage oil outlet 32.
  • the closing spring 34 is received in the through hole of the magnetic core 36.
  • FIG. 2 shown second embodiment of the invention proposed solution is located below the valve body 14 analogous to in FIG. 1 illustrated first throttle plate 18, in which the outlet throttle 60, which is integrated into the drain passage 56, is executed, and the inlet throttle 62, via which the control chamber 64 is pressurized in the nozzle body 20 with fuel under system pressure.
  • the control chamber 64 is limited in this embodiment of the control chamber sleeve 66, in turn, by the spring 68, located on the collar 70 of the injection valve member 24 is supported, is set against the lower plan side of the throttle plate 18.
  • FIG. 2 In contrast to the formation of the switching valve in FIG. 1 , which is designed as a simple switching switching valve, is in FIG. 2 a double-switching switching valve for actuating the fuel injector 10 is shown.
  • the armature assembly 44 includes the ball-shaped valve element 48, which can be placed both in the first seat 50 formed in the valve body 14, and in an intermediate position between this first seat 50 and another, second seat 82, in a Plate cover 80 is formed above the valve body 14.
  • the armature assembly 44 includes the in FIG. 2 dargschreib anchor assembly 44 in addition to the guided in the valve body 14 guide body 52 and the ball-shaped valve element 48 an anchor bolt 88.
  • the anchor plate 46 is received. This is applied to a lock washer 84, which in turn is overlapped by a locking sleeve 86.
  • the resilient stop 90 is formed as a cup-shaped insert 92 in the through hole of the magnetic core 36, in which a spring stop 90 forming ring element over a biasing spring 94 is acted upon.
  • the biasing spring 94 is supported on the one hand on the holding body 12 and is arranged concentrically to the drainage oil drain 32.
  • the biasing spring 94 acts on an inserted into the cup-shaped insert 92 ring which represents the resilient stop 90. Between the bottom of the resilient stop 90 and the top of the locking sleeve 86 of the stroke 96 extends (reference h).
  • the resilient stop 90 defines the intermediate switching position of the valve element 48, ie the switching valve in an intermediate position between the first seat 50 and the other, second seat 82nd
  • the anchor bolt 88 is joined to the here spherically shaped valve element 48 at the joint 74 material fit, and the ball-shaped valve member 48 is joined to the further, second joint 76 with the substantially cylindrical guide body 52 ,
  • the cylindrically shaped guide body 52 has a recess which is arranged opposite the outlet point 48 of the drainage channel 56. Below the guide diameter of the cylindrically shaped guide body 52 in the valve body 14 extends an overflow channel 54, introduced via the discarded amount through the plate cover 80 into the cavity 28 of the holding body 12 can be, from where the diverted fuel via leakage drain 32 enters the low pressure side of the fuel injection system.
  • the ball-shaped valve element 48 When closed, the ball-shaped valve element 48 is placed in the first seat 50 of the valve body 14 when the solenoid 40 is not energized. As a result, the outlet point 58 of the drainage channel 56 is closed. No control amount is removed from the control chamber 64 in the nozzle body 20; the injection valve member 24 closes the injection opening provided at the combustion chamber end of the fuel injector 10.
  • the switching valve proposed in the invention can be in the in FIG. 2 illustrated second embodiment, very quickly in the defined by the Eisenhubanschlag 90 intermediate switching position and bring in this position, the main injection amount of fuel under system pressure in the combustion chamber of the internal combustion engine.
  • the in FIG. 2 illustrated second embodiment of the solution proposed by the invention can be a compact design very fast switching and force balanced actuator assembly including a solenoid valve for actuating a Kraftstoffinj ectors 10 realize.
  • FIG. 2 illustrated used in the context of the switching valve anchor assembly 44, prefabricated components, such as the spherical valve member 48 may be used.
  • the armature assembly 44 according to the embodiment in FIG. 1 has the in FIG. 2 illustrated armature assembly 44 in addition to the anchor plate 46, the spherical shaped valve member 48 and the cylindrical guide body 52, the anchor bolt 88, the lock washer 84 and the surrounding locking sleeve 86.
  • the resilient stopper 90 is additionally provided, which defines the intermediate switching position of the ball-shaped valve element 48 between the first seat 50 and the second seat 82.
  • the pot-shaped insert 92 has a wall 100 in which at least one opening 98 is provided, via which controlled amount from the cavity 28 of the holding body is able to flow into the leakage oil outlet 32. From detail X also shows that the resilient stopper 90 rests on an edge of the wall 100 of the cup-shaped insert 92 and is acted upon by the detail in X only indicated biasing spring 94. In detail X, the stroke 96 is also shown, around which the armature assembly 44 to reach the center position defined by the resilient stop 90 to move in the vertical direction.

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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)
EP08100935A 2007-03-16 2008-01-25 Soupape pour injecteurs de carburant Withdrawn EP1970557A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710012706 DE102007012706A1 (de) 2007-03-16 2007-03-16 Ventil für Kraftstoffinjektoren

Publications (2)

Publication Number Publication Date
EP1970557A2 true EP1970557A2 (fr) 2008-09-17
EP1970557A3 EP1970557A3 (fr) 2009-08-26

Family

ID=39387454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08100935A Withdrawn EP1970557A3 (fr) 2007-03-16 2008-01-25 Soupape pour injecteurs de carburant

Country Status (2)

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EP (1) EP1970557A3 (fr)
DE (1) DE102007012706A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020053359A1 (fr) * 2018-09-12 2020-03-19 Liebherr-Components Deggendorf Gmbh Soupape d'injecteur de carburant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1276503B1 (it) * 1995-07-14 1997-10-31 Elasis Sistema Ricerca Fiat Perfezionamenti ad una valvola di dosaggio a comando elettromagnetico, per un iniettore di combustibile.
EP1081372B1 (fr) * 1999-08-31 2004-10-13 Denso Corporation Dispositif d'injection de carburant
DE10254749A1 (de) * 2002-11-23 2004-06-17 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung mit einem 3/3-Wege-Steuerventil zur Einspritzverlaufsformung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020053359A1 (fr) * 2018-09-12 2020-03-19 Liebherr-Components Deggendorf Gmbh Soupape d'injecteur de carburant
CN112771269A (zh) * 2018-09-12 2021-05-07 利勃海尔零部件德根多夫有限公司 燃料喷射器的阀

Also Published As

Publication number Publication date
DE102007012706A1 (de) 2008-09-18
EP1970557A3 (fr) 2009-08-26

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