EP3112663B1 - Kraftstoffeinspritzventil und steuerventil dafür - Google Patents
Kraftstoffeinspritzventil und steuerventil dafür Download PDFInfo
- Publication number
- EP3112663B1 EP3112663B1 EP16170837.5A EP16170837A EP3112663B1 EP 3112663 B1 EP3112663 B1 EP 3112663B1 EP 16170837 A EP16170837 A EP 16170837A EP 3112663 B1 EP3112663 B1 EP 3112663B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- central axis
- valve element
- injection
- control 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.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims description 60
- 238000002347 injection Methods 0.000 claims description 56
- 239000007924 injection Substances 0.000 claims description 56
- 230000009471 action Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- 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
-
- 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
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
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- 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
- F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
Definitions
- the disclosure relates to a control valve used in a fuel injector and a fuel injector, in particular a common rail type fuel injector, comprising such a control valve.
- a fuel injector generally comprises a control valve and an injection valve, the fuel injection action of the injection valve being controlled by switching the control valve between its opened and closed states.
- Figure 1 schematically shows a partial structure of such a control valve, the control valve comprising a valve seat 1 which is formed with a valve hole 2 and a valve seating surface 3, a spherical valve element 4 which cooperates with the valve seating surface 3 to achieve the opening and closing of the valve hole 2, and a holding block 5 which accommodates a portion of the valve element 4 and acts to push the valve element 4 towards a position where it closes the valve hole 2.
- the valve hole 2, the valve element 4 and the holding block 5 are disposed along a central axis Z that extends in a longitudinal direction of the control valve.
- valve element 4 When the valve element 4 is pushed by the holding block 5 to be biased against the valve seating surface 3, pressure accumulation of the fuel in the injection valve is effected. Once the pushing force from the holding block 5 disappears, the valve element 4 leaves the valve seating surface 3, and a portion of the fuel in the injection valve flows into the control valve via the valve hole 2 so that pressure difference is established in the injection valve and thus a fuel injection action of the injection valve is performed.
- valve element 4 When the valve hole 2 is opened, the valve element 4 is impacted by the fuel introduced from the injection valve via the valve hole 2. As a result, after a long term service, an erosion portion 6 may be formed in a portion of the valve element 4 that faces towards the valve hole 2 due to erosive impaction of the fuel, as shown in Figure 2 .
- the valve element 4 may rotate slowly and randomly around the longitudinal central axis Z and transverse axes that are perpendicular to the longitudinal central axis Z with respect to the holding block 5, as indicated by arrows in this figure.
- the erosion portion 6 When the erosion portion 6 is turned to a location facing towards the valve seating surface 3, as shown in Figure 3 , the valve element 4 cannot close the valve hole 2 effectively, which impedes the pressure accumulation in the fuel in the injection valve and thus causes malfunction of the fuel injector.
- FR 2 973 092 A1 discloses a control valve according to the preamble of claim 1.
- An object of the disclosure is to make improvements to the fuel injector to alleviate or prevent the above problems caused by the erosive impacting of the valve element in the prior art.
- the present invention provides a control valve according to claim 1.
- a control valve that can be used in a fuel injector, the control valve comprising: a valve seat defining a valve seating surface and a valve hole extending through the center portion of the valve seating surface in a longitudinal direction, the valve hole and the valve seating surface defining a longitudinal central axis, and the valve hole being in communication with an injection valve of the fuel injector; a valve element configured to be moved between a closed position and an opened position along the longitudinal central axis, the valve element being in contact and fitting with the valve seat in the closed position to close the valve hole, and the valve element being moved away from the valve seat in the opened position to open the valve hole; and a holding block having an accommodating recess for holding the valve element; wherein the valve element is in the form of a solid of revolution, with the longitudinal central axis being the revolution axis of the solid of revolution, and the solid of revolution having a non-circular section in a longitudinal plane in which the longitudinal central axis lies so that the valve element is able to
- the valve element comprises a first portion received in the accommodating recess and a second portion exposed from the holding block, and the valve element is able to rotate around the longitudinal central axis by means of form fitting between the first portion and the accommodating recess.
- the valve element is unable to rotate around any transverse central axis (X, Y) that is perpendicular to the longitudinal central axis.
- control valve further comprises a biasing mechanism configured for selectively applying a pushing force to the holding block so that the valve element is moved towards the closed position under the action of the holding block.
- control valve further comprises a returning mechanism configured for forcing the biasing mechanism to move towards its home location in a direction opposite to its pushing force applying direction.
- the valve element is pushed to the opened position from the closed position under the action of high pressure fuel introduced from an injection valve cavity via the valve hole.
- a fuel injector in particular a common rail type fuel injector, comprising a control valve described above and an injection valve assembled to be in combination with the control valve; wherein the injection valve performs fuel injection in responsive to the opened/closed state of the control valve.
- the injection valve comprises an injection valve cavity and a valve needle disposed in the injection valve cavity; wherein when the valve element of the control valve is in the opened position, a portion of high pressure fuel contained in the injection valve cavity flows into the control valve via the valve hole of the control valve so that a pressure difference appears between front and back sides of the valve needle, and the valve needle moves backwards because of the pressure difference to open the injection valve so that a fuel injection action is performed.
- the valve element by using a non-spherical valve element in the form of a solid of revolution with the revolution axis of it along the longitudinal central axis, the valve element is able to rotate around the longitudinal central axis, and by means of the fitting between the valve element and the holding block and/or the fitting between the valve element and the valve seating surface, the valve element is unable to rotate around any transverse central axis, so that the valve hole of the control valve, which is in a closed state, can always be effectively closed tightly even if there is any erosion in the valve element, and the function of the control valve can be reliably maintained in a long term.
- Figure 4 shows in partial an example of a fuel injector for injecting fuel into an engine, in particular a fuel injector used in a common rail type diesel injection system.
- the fuel injector comprises a control valve and an injection valve which is assembled together, for example, assembled in a common fuel injector casing 8 (not illustrated in detail).
- the improvements made relate to the control valve, and so Figure 4 only shows corresponding portions relevant to the control valve.
- the injection valve is assembled to a front side (lower side in Figure 4 ) of the control valve, facing towards the engine.
- the control valve is switchable between an opened state and a closed state.
- the fuel injection actions of the injection valve are controlled by the opened and closed states of the control valve.
- the control valve has a central axis Z extending in a longitudinal direction, and comprises a valve seat 1 in which a valve hole 2 extending in the longitudinal direction is formed, and a valve seat cavity defined by a valve seating surface 3 and an inner peripheral surface 7.
- the central axis of the valve hole 2 coincides with the longitudinal central axis Z, and the valve hole 2 has a front end (lower end in Figure 4 ) opened into an injection valve cavity of the injection valve and a back end (upper end in Figure 4 ) opened into the valve seat cavity.
- High pressure fuel that is supplied into the injection valve cavity can flow into the valve seat cavity via the valve hole 2 to create partial pressure relief in the injection valve cavity.
- the valve seating surface 3 is formed between the valve hole 2 and inner peripheral surface 7. Both the valve seating surface 3 and inner peripheral surface 7 are conical surfaces, with the valve seating surface 3 having a bigger cone angle than the inner peripheral surface 7.
- the control valve further comprises a valve element 4 in the form of an oblate spheroid which is formed by rotating an ellipse around the central axis Z, the valve element 4 being in the valve seat cavity, facing the valve seating surface 3, and fitting with the valve seating surface 3 to achieve the opening and closing of the valve hole 2.
- the cone angle of the valve seating surface 3 facilitates the centering of the valve element 4.
- the oblate spheroid forming the valve element 4 has a shorter semi-axis length in the longitudinal central axis Z and two longer semi-axis lengths (the two longer semi-axis lengths being equal to each other) transverse central axes X, Y that are perpendicular to the longitudinal central axis Z so that the valve element 4 has an elliptical section in a front view ( Figure 5 ) and a side view ( Figure 6 ) made perpendicular to the longitudinal central axis Z and a circular section in a top view ( Figure 7 ) made in the longitudinal central axis Z.
- the control valve further comprises a holding block 5, which is located axially behind the valve element 4 and is formed with an accommodating recess, the accommodating recess having a shape corresponding to the outer shape of a first portion (substantially back half portion) of the valve element 4 for accommodating the first portion of the valve element 4, and a second portion (substantially front half portion) of the valve element 4 being exposed and facing the valve seating surface 3 and the valve hole 2.
- the two portions of the valve element 4 may be formed to be integral with each other, or be formed separately and then assembled to each other.
- the control valve further comprises an intermediate ring 9 disposed behind the valve seat 1 and a guiding tube 10 disposed behind the intermediate ring 9.
- the guiding tube 10 comprises a tubular portion 10a extending in the axial direction and a flange member 10b extended radially outwards from a front end of the tubular portion 10a, the flange member 10b being formed with a plurality of through holes 10c extending therethrough axially.
- the control valve further comprises an assembling sleeve 11 disposed behind the flange member 10b, the assembling sleeve 11 being fixed in the fuel injector casing 8 by screw threads or other means.
- a circular space is formed between the assembling sleeve 11 and the tubular portion 10a.
- a front end of the valve seat 1 is biased against a corresponding step in the fuel injector casing 8. In this way, the valve seat 1, the intermediate ring 9 and the guiding tube 10 are clamped together in the axial direction by means of the assembling sleeve 11.
- the control valve further comprises an armature core 12 having a main body in the form of a cylinder extending in the axial direction and a circular flange 12a formed adjacent to a front end of the main body or assembled thereto and extending radially.
- the main body of the armature core 12 inserts through an inner hole in the tubular portion 10a in an axially slidable manner, with the circular flange 12a being in front of the flange member 10b and mainly within an internal space of the intermediate ring 9.
- the internal space of the intermediate ring 9 is in fluid communication with the circular space between the assembling sleeve 11 and the tubular portion 10a via the through holes 10c, and the internal space of the intermediate ring 9 is also in fluid communication with the valve seat cavity.
- the front end of the main body of the armature core 12 is adhered to a back end of the holding block 5.
- a back end (not shown) of the main body of the armature core 12 extends out of a back end of the tubular portion 10a.
- a compressive spring 13 is disposed in the circular space between the assembling sleeve 11 and the tubular portion 10a, the compressive spring 13 having a front end biased against a back end surface of the flange member 10b and a back end applying an axially backward pushing force to the back end of the main body of the armature core 12 via an element or structure not shown.
- the control valve further comprises a magnetic coil which generates an axially forward pushing force in the armature core 12 by electric-magnetic induction in an energized state.
- the forward pushing force generated in the magnetic coil overcomes a backward pushing force provided by the compressive spring 13 and the fuel pressure in the valve hole 2 so that the armature core 12 is in an advanced position as shown in Figure 4 and thus pushes the valve element 4 against the valve seating surface 3 via the holding block 5 to close the valve hole 2 and achieve the closed state.
- the back end surface of the circular flange 12a is separated from a front end surface of the flange member 10b by a small axial distance.
- control valve has their central axes generally aligned with the longitudinal central axis Z.
- the injection valve comprises a valve needle (not shown) disposed in its injection valve cavity, and the opening and closing of the injection valve is controlled by the axial movement of the valve needle to perform fuel injection.
- the magnetic coil in the control valve is energized so that the control valve comes into the closed state shown in Figure 4
- the fuel for example, comes from a common rail
- the valve needle in the injection valve closes the injection valve.
- the magnetic coil in the control valve is de-energized so that the control valve comes into the opened state, so a portion of the fuel in the injection valve cavity flows into the control valve via the valve hole 2.
- the valve needle moves backwards to open the injection valve, so a fuel injection action is performed.
- the fuel that flows into the control valve via the valve hole 2 will then flow through the valve seat cavity, the internal space of the intermediate ring 9, the through holes 10c, and the circular space between the assembling sleeve 11 and the tubular portion 10a in sequence, and finally flows back to a fuel tank.
- the magnetic coil in the control valve is energized again so that the control valve comes to the closed state again, and thus the injection valve is switched to the pressure accumulation state until the fuel pressures at the front and back sides of the valve needle become the same level. Now the valve needle closes the injection valve under a returning element for the valve needle. Then, the next fuel injection action will be performed.
- the forward pushing force applied to the holding block 5 is generated by the magnetic coil and the armature core 12. It is appreciated that, however, other forms of biasing mechanisms may alternatively be used for applying a forward pushing force to the holding block 5 so that the valve element 4 is biased against the valve seating surface 2 to close the valve hole 2.
- the armature core 12 returns to its home position by means of the compressive spring 13 to release the forward pushing force applied to the holding block 5. It is appreciated that, however, other forms of returning mechanisms may alternatively be used for forcing the biasing mechanism to move back to its home position so that the valve element 4 can leave the valve seating surface 3 to open the valve hole 2.
- the holding block 5 since there is a fuel film between the armature core 12 and the holding block 5, and the holding block 5 is always subjected to a fuel pressure from the valve hole 2 (directly, or transmitted from the valve element 4 to the holding block 5), the holding block 5 always keeps to be adhered to the armature core 12 when the armature core 12 moves.
- a locating structure of the type of form fitting may be provided at the interface between them.
- valve element 4 As shown in Figure 8 , for the reason that the valve element 4 is in the form of an oblate spheroid with the longitudinal central axis Z as its revolution axis, and that the holding block 5 is formed with the accommodating recess for accommodating and forming form fitting with the first portion of the valve element 4, the valve element 4 has the ability of rotating slowly around the longitudinal central axis Z with respect to the holding block 5 and the valve seat 1, as indicated by the arrow in this figure, but the valve element 4 is unable to rotate around the two transverse central axes X, Y.
- valve element 4 When the control valve is switched from closed state to the opened state, as the valve element 4 leaves the valve seating surface 3 axially backwards, the high pressure fuel comes from the injection valve via the valve hole 2 will impact the valve element 4 in the form of jet flow.
- the jet flow which is mainly fuel in gas state
- a portion of the valve element 4 that faces towards the valve hole 2 is subjected to erosive impaction and thus an erosion portion 6 will be formed, as shown in Figure 9 .
- the erosion portion 6 since the valve element 4 is not able to rotate around its transverse central axes X, Y, the erosion portion 6 always faces towards the valve hole 2 and cannot comes to a position facing the valve seating surface 3 even if the valve element 4 rotates around the longitudinal central axis Z.
- valve element 4 by means of the fitting between the oblate spheroidal valve element 4 and the holding block 5, the valve element 4 restricted from rotating around any transverse central axis. It is appreciated that the valve element 4 may alternatively be in the form of other solids of revolution to achieve the same function.
- the valve element 4 is formed by combination of a first portion in the form of a half oblate spheroid fitting in the holding block 5 and a second portion in the form of a semi sphere exposed from the holding block 5, the two portions each having the longitudinal central axis Z as its revolution axis.
- the valve element 4 has the ability of rotating around the longitudinal central axis Z but does not have the ability of rotating around any transverse central axis.
- the valve element 4 is formed by combination of a first portion in the form of a truncated cone fitting in the holding block 5 and a second portion in the form of a semi sphere exposed from the holding block 5, the two portions each having the longitudinal central axis Z as its revolution axis.
- the valve element 4 has the ability of rotating around the longitudinal central axis Z but does not have the ability of rotating around any transverse central axis.
- the valve element 4 is formed by combination of a first portion in the form of a cylinder in the holding block 5 and a second portion in the form of a semi sphere exposed from the holding block 5, the two portions each having the longitudinal central axis Z as its revolution axis.
- the valve element 4 has the ability of rotating around the longitudinal central axis Z but does not have the ability of rotating around any transverse central axis.
- Other shapes (including combined shapes) of the first portion for obtaining the above functions can also be contemplated.
- a first portion of the valve element 4 which fits in the holding block 5 is in the form of a semi sphere, and a second portion exposed from the holding block 5 has a main body in the form of substantial cylinder, with a front peripheral portion (the transition portion between the cylindrical surface and a flat front end surface) of the second portion forming a conical portion 4a.
- the conical portion 4a has a cone angle equal to the cone angle of the valve seating surface 3, and thus forms sealing contact with the valve seating surface 3.
- the holding block 5 transmits the axially forward pushing force induced by the magnetic coil on the armature core 12 to the valve element 4 to forcefully pushing the valve element 4 against the valve seating surface 3, so the valve element 4 is automatically centered by means of the fitting between the conical portion 4a and the valve seating surface 3. In this way, any possible micro rotation of the valve element 4 around any transverse central axis can be eliminated or corrected, and thus the portion of the valve element 4 that faces towards the valve hole 2 cannot be misplaced transversely.
- a first portion of the valve element 4 which fits in the holding block 5 is in the form of a semi sphere, and a second portion exposed from the holding block 5 is in the form of a substantial cone.
- a portion of the valve seating surface 3 that is corresponding to the second portion of the valve element 4 is reformed to have the same cone angle with the second portion of the valve element 4. In this way, the valve element 4 is automatically centered by means of the dynamic fitting between the second portion of the valve element 4 and corresponding portion of the valve seating surface 3, so any possible micro rotation of the valve element 4 around any transverse central axis can be eliminated or corrected.
- a first portion of the valve element 4 which fits in the holding block 5 is in the form of a truncated cone (similar to that shown in Figure 11 ), and a second portion exposed from the holding block 5 has a main body in the form of substantial cylinder with a front peripheral portion formed as a conical portion 4a (similar to that shown in Figure 13 ).
- valve element 4 rotating around any transverse central axis is eliminated by means of the static fitting between the first portion of the valve element 4 and the holding block 5, and the valve element 4 is given the automatic centering ability thanks for the fitting between the second portion of the valve element 4 and the valve seating surface 3, so the valve element 4 is additionally prevented from rotating around any transverse central axis.
- Other combined fitting solution can also be contemplated.
- valve element 4 possesses the ability of rotating around the longitudinal central axis (which provides flexibility in the assemble and operation of the control valve) by forming the valve element 4 as a solid of revolution with the longitudinal central axis Z as its revolution axis, but the valve element 4 has a non-circular section in any longitudinal plane that passes through the longitudinal central axis Z.
- fitting static fitting
- fitting dynamic fitting
- the portion of the valve element 4 that faces towards the valve hole 2 is maintained to be not misplaced in any transverse direction and thus cannot moves to a position facing the valve seating surface 3.
- the valve element 4 Even if erosion is formed on the portion of the valve element 4 that faces towards the valve hole 2 by fuel impaction, the valve element 4 always effectively guarantee that the valve hole of the control valve is closed when the control valve is in the closed state, so the function of the control valve can be maintained in a long time. As a result, the service time of the control valve, or even of the whole fuel injector, can be prolonged.
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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)
Claims (6)
- Steuerventil, welches in einem Kraftstoffeinspritzventil verwendet wird, umfassend:einen Ventilsitz (1), der eine Ventilsitzfläche (3) und ein Ventilloch (2) definiert, das sich durch den zentralen Abschnitt der Ventilsitzfläche (3) in einer Längsrichtung erstreckt, wobei das Ventilloch (2) und die Ventilsitzfläche (3) eine zentrale Längsachse (Z) definieren, und das Ventilloch (2) mit einem Einspritzventil des Kraftstoffeinspritzventils in Kommunikation steht;ein Ventilelement (4), das ausgelegt ist, zwischen einer geschlossenen Position und einer geöffneten Position entlang der zentralen Längsachse (Z) bewegt zu werden, wobei das Ventilelement (4) mit dem Ventilsitz (1) in der geschlossenen Position in Kontakt steht und an diesen gepasst ist, um das Ventilloch (2) zu schließen, und das Ventilelement (4) von dem Ventilsitz (1) in der geöffneten Position wegbewegt wird, um das Ventilloch (2) zu öffnen; undeinen Halteblock (5) mit einer Aufnahmevertiefung zum Halten des Ventilelements (4);wobei das Ventilelement (4) in der Form eines Drehkörpers ist, wobei die zentrale Längsachse (Z) die Drehachse des Drehkörpers ist, und der Drehkörper einen nicht-kreisförmigen Querschnitt in einer Längsebene aufweist, in der die zentrale Längsachse (Z) liegt, so dass sich das Ventilelement (4) um die zentrale Längsachse (Z) drehen kann, sich jedoch nicht um irgendeine zentrale Querachse drehen kann, die rechtwinklig zu der zentralen Längsachse (Z) ist,wobei das Ventilelement (4) einen ersten Abschnitt, der in der Aufnahmevertiefung aufgenommen ist, und einen zweiten Abschnitt, der von dem Halteblock (5) freiliegt, umfasst, und sich das Ventilelement (4) um die zentrale Längsachse (Z) durch eine Formpassung zwischen dem ersten Abschnitt und der Aufnahmevertiefung drehen kann, dadurch gekennzeichnet, dass durch die Formpassung zwischen dem zweiten Abschnitt und der Ventilsitzfläche (3) sich das Ventilelement (4) nicht um irgendeine zentrale Querachse (X, Y) drehen kann, die rechtwinklig zu der zentralen Längsachse (Z) ist.
- Steuerventil nach Anspruch 1,
ferner umfassend einen Vorspannmechanismus, der zum selektiven Ausüben einer Schubkraft auf den Halteblock (5) ausgelegt ist, so dass das Ventilelement (4) zu der geschlossenen Position unter der Einwirkung des Halteblocks (5) bewegt wird. - Steuerventil nach Anspruch 2,
ferner umfassend einen Rückführmechanismus, der ausgelegt ist, den Vorspannmechanismus zu zwingen, sich zu seinem Ausgangsort in einer Richtung entgegengesetzt zu der Richtung des Ausübens seiner Schubkraft zu bewegen. - Steuerventil nach Anspruch 2 oder 3,
wobei das Ventilelement (4) aus der geschlossenen Position zu der geöffneten Position unter der Einwirkung von Hochdruck-Kraftstoff geschoben wird, der aus einem Einspritzventilhohlraum über das Ventilloch (2) eingeführt wird. - Kraftstoffeinspritzventil, insbesondere ein Kraftstoffeinspritzventil vom Common-Rail-Typ, umfassend:ein Steuerventil nach einem der Ansprüche 1 bis 4; undein Einspritzventil, das montiert ist, um mit dem Steuerventil kombiniert zu sein;wobei das Einspritzventil eine Kraftstoffeinspritzung ansprechend auf den geöffneten/geschlossenen Zustand des Steuerventils vornimmt.
- Kraftstoffeinspritzventil nach Anspruch 5,
wobei das Einspritzventil einen Einspritzventilhohlraum und eine Ventilnadel umfasst, die in dem Einspritzventilhohlraum angeordnet ist; und
wobei, wenn sich das Ventilelement (4) des Steuerventils in der geöffneten Position befindet, ein Teil des Hochdruck-Kraftstoffs, der in dem Einspritzventilhohlraum enthalten ist, in das Steuerventil über das Ventilloch (2) des Steuerventils strömt, so dass ein Druckunterschied zwischen der vorderen und hinteren Seite der Ventilnadel auftritt, und sich die Ventilnadel aufgrund des Druckunterschieds rückwärts bewegt, um das Einspritzventil zu öffnen, so dass eine Kraftstoffeinspritzaktion vorgenommen wird.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510387784.2A CN106321307B (zh) | 2015-07-03 | 2015-07-03 | 燃油喷射器及其控制阀 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3112663A1 EP3112663A1 (de) | 2017-01-04 |
EP3112663B1 true EP3112663B1 (de) | 2018-09-12 |
Family
ID=56068782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16170837.5A Active EP3112663B1 (de) | 2015-07-03 | 2016-05-23 | Kraftstoffeinspritzventil und steuerventil dafür |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3112663B1 (de) |
JP (1) | JP6824645B2 (de) |
CN (1) | CN106321307B (de) |
Families Citing this family (1)
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DE102022211537A1 (de) * | 2022-10-31 | 2024-05-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Proportionalregelventil zum Steuern eines gasförmigen Brennstoffs in einem Brennstoffversorgungssystem einer Brennkraftmaschine, Druckregeleinheit sowie Brennstoffversorgungssystem |
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JP3584554B2 (ja) * | 1995-07-26 | 2004-11-04 | 株式会社デンソー | 蓄圧式燃料噴射装置 |
JP2002364483A (ja) * | 2001-06-07 | 2002-12-18 | Denso Corp | 燃料噴射装置 |
DE102004049288A1 (de) * | 2004-10-09 | 2006-04-20 | Robert Bosch Gmbh | Kraftstoffinjektor mit formgeprägtem Ventilsitz zur Reduzierung der Ankerhubdrift |
JP2006291856A (ja) * | 2005-04-12 | 2006-10-26 | Denso Corp | 燃料噴射弁 |
JP2008175085A (ja) * | 2007-01-16 | 2008-07-31 | Denso Corp | 燃料噴射装置のプレッシャリミッタ |
JP2009030563A (ja) * | 2007-07-30 | 2009-02-12 | Denso Corp | インジェクタ |
DE102008001597A1 (de) * | 2008-05-06 | 2009-11-12 | Robert Bosch Gmbh | Kraftstoff-Injektor |
DE102008041362A1 (de) * | 2008-08-20 | 2010-02-25 | Robert Bosch Gmbh | Vorrichtung zur Versorgung einer Verbrennungskraftmaschine mit Treibstoff |
FR2973092B1 (fr) * | 2011-03-25 | 2016-09-02 | Bosch Gmbh Robert | Dispositif d'obturation, regulateur de pression comportant un tel dispositif, dispositif d'injection diesel comportant un tel regulateur, moteur diesel et vehicule comportant un tel moteur |
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CN106321307B (zh) | 2020-03-06 |
EP3112663A1 (de) | 2017-01-04 |
CN106321307A (zh) | 2017-01-11 |
JP6824645B2 (ja) | 2021-02-03 |
JP2017040254A (ja) | 2017-02-23 |
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