WO2008098806A1 - Injecteur pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne - Google Patents

Injecteur pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne Download PDF

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Publication number
WO2008098806A1
WO2008098806A1 PCT/EP2008/050252 EP2008050252W WO2008098806A1 WO 2008098806 A1 WO2008098806 A1 WO 2008098806A1 EP 2008050252 W EP2008050252 W EP 2008050252W WO 2008098806 A1 WO2008098806 A1 WO 2008098806A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
component
guide pin
valve
fuel
Prior art date
Application number
PCT/EP2008/050252
Other languages
German (de)
English (en)
Inventor
Nadja Eisenmenger
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 WO2008098806A1 publication Critical patent/WO2008098806A1/fr

Links

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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus

Definitions

  • Injector for injecting fuel into combustion chambers of internal combustion engines
  • the invention relates to an injector for injecting fuel into combustion chambers of internal combustion engines according to the preamble of claim 1.
  • EP 1 612 403 A1 describes a common-rail injector with a control valve which is pressure-balanced in the axial direction for blocking and opening a fuel discharge path from a control chamber.
  • the valve sleeve having a control valve By means of the valve sleeve having a control valve, the fuel pressure can be influenced within the supplied via an inlet throttle fuel control chamber.
  • valve element Due to the variation of the fuel pressure within the control chamber, a valve element whose upper end face the control chamber is limited downwardly limited between an upper open position and a lower closed position, wherein the valve element in its open position releases the fuel flow into the combustion chamber of an internal combustion engine ,
  • the valve sleeve encloses radially outside a guide pin which widens in a lower radial portion, wherein the valve seat of the axially adjustable valve sleeve of the control valve is arranged on the widened radial portion of the guide pin.
  • the radial section of the guide pin is supported in the axial direction upwards on a sleeve-shaped injector component, which is screwed into the injector body.
  • the husk mige Injektorbauteil of an axial section of the guide pin and the valve sleeve enclosing it passes in the axial direction.
  • the widened radial section of the guide pin rests on a plate component, ie is clamped in a sandwich between the sleeve-shaped injector component and the plate component.
  • the fuel drain path is formed by an axial bore, which crosses a radial bore in its upper region, so that the fuel impinges in the radial direction on the valve sleeve.
  • a disadvantage of the known injector is the low pressure resistance of the guide pin due to the intersecting holes of the fuel drainage path. Furthermore, the complex production of the guide pin is disadvantageous because a lot of material must be machined in order to realize the narrow axial section of the guide pin on the wide radial section.
  • the invention is therefore based on the object to propose a new Injektorkir in which the coming to use the guide pin may have a radial section with a smaller diameter to have to chop less material in the production of the guide pin.
  • the invention is based on the idea not to arrange the valve seat of the valve sleeve as in the prior art on the guide pin, but to assign the valve seat an injector component, which is penetrated by an axial portion of the guide pin. Since the opening for receiving the axial section of the guide pin necessary for this purpose in the injector component only has to have a diameter which is slightly larger than the diameter of the axial section of the guide pin, the radial section of the guide pin adjoining the axial section can be substantially narrower in the radial direction as in known injectors, in order to exert its support function on the injector component or an adjacent injector component through which the axial portion of the guide pin is also passed.
  • the injector component through which the axial section of the guide bolt is guided, can be, for example, a plate-shaped component which is supported in the axial direction on the injector body or on a component fixed to the injector body (eg screwed in) or between two components, in particular high pressure tight, is tight.
  • the injector component prefferably be formed by the injector body, that is to say the injector housing, which continues inward in the radial direction and thus forms a, in particular centric, passage opening for the passage of the axial section of the guide bolt.
  • the radial section of the guide pin is thus not clamped on both sides between two components of the injector, which facilitates assembly.
  • the axial extent of the radial portion of the guide pin can be made with a large tolerance.
  • the guide pin in particular exclusively, is pressurized in the direction of the injector component penetrated by the fuel flowing out of the control chamber in the direction of the low-pressure region.
  • This fuel which is essentially under rail pressure provides for a system of the radial section with its support surface on the Injektorbauteil or adjacent to him component.
  • the guide pin in addition to the Fuel pressure in the direction of the injector component is spring-loaded.
  • a spring which acts on the valve sleeve in the direction of its valve seat and which is supported in the axial direction on the guide pin or a disc held on the guide pin is spring-loaded.
  • Particularly preferred is an embodiment in which the fuel drain path from the control chamber in the direction of the low pressure region of the injector is not passed through the guide bolt, but on this. As a result, crossing holes are avoided in the guide pin, which significantly increases the high pressure resistance of the guide pin and thus the life of the entire injector.
  • section of the guide pin has a very narrow guide, that is very close to the axial portion of the guide pin, the opening in the injector depending on the production cost either the same diameter as the valve sleeve or be slightly larger.
  • a slightly larger training also facilitates the flow of fuel past the guide pin in the direction of the low pressure area.
  • the guide pin in the region of the opening of the injector component, which is penetrated by the guide pin have a polygonal cross-section or be provided with lateral flats. If the lead-through opening in the injector component should have a slightly larger diameter than the guide diameter of the valve sleeve, a small pressure step is produced on the valve sleeve, so that the valve sleeve is not completely pressure-balanced. However, this minimum pressure level facilitates the opening of the valve sleeve, ie the lifting of the valve sleeve from its valve seat provided on the injector component.
  • An advantage is a construction in which the radial portion of the guide pin does not protrude directly into the control chamber, but in which the radial portion is received in an intermediate chamber which is connected via a drain passage with outlet throttle to the control chamber, so that of the control chamber at opened Steuerven- til flowing fuel into the intermediate chamber and from there, preferably laterally past the guide pin in the low pressure region of the injector can flow.
  • the throttle can be realized, for example, as a ring throttle between the guide pin and the penetrated by him injector component.
  • the intermediate chamber is supplied in a development of the invention by a Mountainrossel with high-pressure fuel.
  • the injector is an injector operated by an electromagnetic actuator with an axially adjustable armature, which is operatively connected to the valve sleeve of the control valve, preferably integrally formed therewith.
  • FIG. 1 is a schematic, partial sectional view of an injector with a substantially pressure-balanced control valve
  • 2 shows an alternative arrangement of a guide pin of an injector
  • 3 shows a valve seat designed as a conical seat of the control valve
  • FIG. 4 shows a valve seat of the control valve designed as a flat seat with seat angle difference ground into the injector component
  • Fig. 5 designed as a flat seat valve seat of
  • FIG. 6 shows an exemplary embodiment of an injector in which an intermediate chamber receiving a radial section of the guide pin is connected via a filling throttle to a pressure chamber of the injector.
  • FIG. 1 an injector 1 for injecting fuel into combustion chambers of internal combustion engines of a motor vehicle is shown.
  • a high-pressure conveyor 2 conveys fuel from a fuel reservoir 3 into a high-pressure fuel accumulator 4 (rail). In this fuel, especially diesel or gasoline, under high pressure, of about 2000 bar in this embodiment, stored.
  • the injector 1 is connected to the fuel high-pressure accumulator 4 in addition to other injectors, not shown, via a supply line 5.
  • the supply line 5 opens into a pressure chamber 6 of the injector 1.
  • a return line 7 a low-pressure region 8 of the inlet 1 connected to the fuel device container 3.
  • a control amount of fuel to be explained later can flow from the injector 1 to the fuel reservoir 3.
  • valve element 9 Within the pressure chamber 6 is a down to the lower level in the drawing level of the injectorurbantzendes valve element 9 is arranged, which may be formed in one or more parts.
  • the valve element 9 is guided lssensverschiebiezing and has at a tip 10 a shooting surface 11, with which the valve element 9 can be brought into tight contact with a formed within a nozzle body 12 valve member seat 13.
  • valve element 9 When the valve element 9 rests against the valve element seat 13, that is to say is in a closed position, the fuel outlet from a nozzle hole arrangement 14 is blocked. If, on the other hand, it is raised by the valve element seat 13, fuel can flow out of the pressure chamber 6, if appropriate via further spaces arranged inside an injector body 15 for reasons of clarity, past the valve element seat 13 to the nozzle hole arrangement 14 and stand there substantially under the high pressure (rail pressure) be injected into a combustion chamber.
  • a control chamber 18 is delimited by an upper end face 16 of the valve element 9 and a sleeve-shaped insert part 17 in its lower section, which is supplied with high-pressure fuel from the pressure chamber 6 via an inlet throttle 19 running radially in the insert part 17.
  • the control chamber 18 is connected via an axially extending in the insert part 20 channel 20 with outlet throttle 21 with one of an upper portion of the insert part 17 and an axially adjacent plate member 22 (injector component) limited intermediate chamber 23 is connected. From this, fuel can flow into the low-pressure region 8 of the injector and thus via the return line 7 to the fuel reservoir 3 when a control valve 25 actuated by an electromagnetic actuator 24 is opened.
  • the flow cross-sections of the inlet throttle 19 and the outlet throttle 21 are matched to one another such that when the control valve 25 is open, a net outflow of fuel (control quantity) flows from the control chamber 18 via the intermediate chamber 23 into the low-pressure region 8 of the injector 1.
  • the control valve 25 is designed as a substantially pressure-balanced in the axial direction valve with a valve sleeve 26.
  • the valve sleeve 26 is integrally connected in its upper region with an anchor plate 27 of the electromagnetic Akuators 24. If electromagnets 28 of the electromagnetic actuator 24 are energized, the valve sleeve 26 lifts off from its valve seat 29 formed on the plate component 22 and, as already mentioned, releases the fuel flow in the direction of the low-pressure region 8.
  • the pressure balance of the control valve 25 is based on the fact that the surfaces of the valve sleeve 26 subjected to low pressure in the opening direction are at least approximately the same size as the areas of the valve sleeve which are acted upon in the closing direction with low pressure. A high-pressure admission (quasi) does not take place.
  • the valve sleeve 26 encloses an axial section 30 of a guide pin 31, the valve sleeve 26 being displaceable in the axial direction relative to the guide pin 31.
  • the axial portion 30 of the guide pin 31 is from below is guided through an opening 32 in the plate member 22, which is supported axially upwards on a sleeve 33 which is screwed into an internal thread 34 of the injector body 15.
  • the axial section 30 continues in the plane of the drawing down to the intermediate chamber 23 and widened there to form a radial section 35.
  • the guide pin 31 bears against the underside of the plate component 22 with a support surface 36 formed on the radial section 35. In this investment position, the guide pin 31 is pressed by the located in the intermediate chamber 23 fuel.
  • the support surface 36 is provided on a circumferential collar of the guide pin 31 formed by the radial section 35.
  • the support surface 36 opposite the free end face 37 of the radial portion 35 is spaced in the axial direction of a bottom 38 of the intermediate chamber 23rd
  • the diameter Dl of the radial section 35 is greater than the diameter D2 of the opening 32.
  • the opening diameter D2 corresponds at least approximately to the guide diameter D3 of the axial section 30 of the guide pin 31 radially inside the valve sleeve 26.
  • the guide diameter D3 is slightly smaller than that Diameter D2 of the opening 32 in the plate member 22 is formed on the valve sleeve 26, not shown, annular diameter stage, so that a (small) opening force acts on the valve sleeve.
  • the fuel flowing in through the outlet valve 21 when the valve sleeve 29 is lifted from the valve seat 29 initially flows radially past the end face 37 of the radial section 35 of the guide pin 31 and then upwardly in the axial direction along the jacket surface 39 of the radial projection. Section 35. Between the lateral surface 39 of the radial portion 35 and the lateral peripheral wall 40 of the intermediate chamber 23, a corresponding gap is formed. Since the support surface 36 is interrupted in the circumferential direction, the fuel in the radial direction inwardly to the lateral surface 41 of the axial section and from there in the axial direction of flats 42 over, between the lateral surface 41 and the peripheral wall 43 of the opening 32 through to the Valve seat 29 flow.
  • the upper level in the plane of the free end 44 of the axial portion 30 of the guide pin 31 projects freely into a spring chamber 45 in which a compression spring 46 is received, which is supported in the axial direction on a component 47 of the injector 1 and the valve sleeve 26 with anchor plate 27th Federkraftbeetzschlagt in the axial direction of the valve seat 29.
  • Fig. 2 an alternative arrangement of the compression spring 46 is shown. This is supported on a disc 48, which in turn at one in a circumferential groove of the guide pin
  • Fig. 3 shows a possible embodiment of the valve seat 29 of the valve sleeve 25 is shown in an enlarged view.
  • the diameter D2 of the opening 32 corresponds to the guide diameter D3 of the axial portion 30 of the guide pin 31 (fully pressure-balanced).
  • the valve sleeve 25 tapers conically in a lower section and bears against the plate component 22 on a valve seat 29, which has a substantially congruent shape. From Fig. 3 is clearly shown a portion of the fuel drain path from the control chamber, not shown, in the direction of the low pressure region 8 of the injector. From the intermediate chamber 23, the fuel flows laterally past the guide pin 31 in the direction of the valve seat 29.
  • valve seat 29 is formed here as a flat seat with formed in the plate member 22 seat angle difference.
  • Fig. 5 shows a valve seat 29 which is formed as a flat seat without seat angle difference and thus already in the new state corresponds to a seat that has adapted over the life of the flat shape of the valve sleeve 25.
  • a circumferentially closed sealing lip 51 is evident, with which the valve sleeve rests against the plate member 22.
  • the embodiment according to FIG. 6 essentially corresponds to the exemplary embodiment according to FIG. 1, so that only the differences will be discussed below in order to avoid repetition.
  • the intermediate chamber 23 is connected to the pressure chamber 6 via a filling throttle 52, so that when the valve seat 29 abutting valve sleeve 25, the intermediate chamber 23 can be refilled faster.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur (1) pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne, notamment un injecteur à rampe commune, avec un élément formant clapet (9) qui est fonctionnellement relié à une chambre de commande (18) à pression de commande variable et qui peut être déplacé entre une position ouverte, libérant l'écoulement de carburant dans une chambre de combustion, et une position fermée. Afin de faire varier la pression de commande dans la chambre de commande (18), il est prévu une soupape de commande (25) dotée d'une douille de soupape (26) qui peut être déplacée par un actionneur (24) entre une position fermée, dans laquelle la douille de soupape (26) s'applique contre un siège de soupape (29), et une position ouverte. La douille de soupape (26) entoure un axe de guidage (31) qui est guidé axialement à travers une ouverture (32) d'un composant d'injecteur et qui présente, sur une partie dépassant de l'ouverture (32) en direction axiale, une surface d'appui (36) tournée vers le composant d'injecteur (22) par laquelle il s'appuie en direction axiale contre le composant d'injecteur ou contre un composant voisin du composant d'injecteur. Selon l'invention, le siège de soupape (29) est associé au composant d'injecteur.
PCT/EP2008/050252 2007-02-13 2008-01-10 Injecteur pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne WO2008098806A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007006946.6 2007-02-13
DE200710006946 DE102007006946A1 (de) 2007-02-13 2007-02-13 Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
WO2008098806A1 true WO2008098806A1 (fr) 2008-08-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/050252 WO2008098806A1 (fr) 2007-02-13 2008-01-10 Injecteur pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne

Country Status (2)

Country Link
DE (1) DE102007006946A1 (fr)
WO (1) WO2008098806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200063703A1 (en) * 2018-08-23 2020-02-27 Progress Rail Services Corporation Electronic Unit Injector Shuttle Valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041502A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Kraftstoffinjektor mit einem Magnetventil
DE102015213739A1 (de) * 2015-07-21 2017-01-26 Robert Bosch Gmbh Kraftstoffinjektor und Verfahren zur Herstellung eines Kraftstoffinjektors
DE102016224208A1 (de) 2016-12-06 2018-06-07 Robert Bosch Gmbh Elektromagnetisch betätigbares Steuerventil für einen Kraftstoffinjektor, Kraftstoffinjektor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
EP1621764A1 (fr) * 2004-06-30 2006-02-01 C.R.F. Società Consortile per Azioni Injecteur d'un moteur à combustion interne
EP1795738A1 (fr) * 2005-12-12 2007-06-13 C.R.F. Societa Consortile per Azioni Système d'injection de carburant pour un moteur à combustion interne et méthode correspondante pour commander l'injection de carburant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
EP1621764A1 (fr) * 2004-06-30 2006-02-01 C.R.F. Società Consortile per Azioni Injecteur d'un moteur à combustion interne
EP1795738A1 (fr) * 2005-12-12 2007-06-13 C.R.F. Societa Consortile per Azioni Système d'injection de carburant pour un moteur à combustion interne et méthode correspondante pour commander l'injection de carburant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200063703A1 (en) * 2018-08-23 2020-02-27 Progress Rail Services Corporation Electronic Unit Injector Shuttle Valve
US11746734B2 (en) * 2018-08-23 2023-09-05 Progress Rail Services Corporation Electronic unit injector shuttle valve

Also Published As

Publication number Publication date
DE102007006946A1 (de) 2008-08-14

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