EP1577540A1 - Steuerventil für ein Einspritzventil - Google Patents
Steuerventil für ein Einspritzventil Download PDFInfo
- Publication number
- EP1577540A1 EP1577540A1 EP04006631A EP04006631A EP1577540A1 EP 1577540 A1 EP1577540 A1 EP 1577540A1 EP 04006631 A EP04006631 A EP 04006631A EP 04006631 A EP04006631 A EP 04006631A EP 1577540 A1 EP1577540 A1 EP 1577540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve needle
- valve
- control valve
- piston
- insert
- 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
- 239000000446 fuel Substances 0.000 title 1
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
Definitions
- the present invention relates to a control valve, in particular for injection valves for internal combustion engines, with a valve housing, one in axial Direction movable valve needle, which is arranged in a cylindrical guide is, and arranged in the movable valve needle piston.
- a control valve for an injection valve is known in which provided within the valve needle associated with the housing piston is.
- the valve needle is sleeve-shaped and the piston engages in the axial Direction in the valve needle.
- the disadvantage of this control valve is that the pressure forces acting on the valve needle by the fluid are not compensated and thus the forces required for switching at higher pressures are big. This leads to an extension of the switching time and thus to a limitation efficiency of injection.
- an insert is received in the valve housing, on which the Piston is held within the valve needle. This can affect the piston acting axial forces are removed via the insert on the housing, without the piston extending through one end of the valve needle got to. Therefore, in a confined space, the forces acting on the use be removed to the valve body.
- a preferred embodiment of the invention lift in the closed Condition of the valve needle the acting by a fluid axial compressive forces on. Because especially at high pressures, the axial compressive forces are responsible for that to close and keep the valve closed high forces Need to become. If the valve needle, however, not significantly through axial pressure forces of a fluid is pressed in one direction, the Switching forces are minimized and accordingly the switching time can be extremely short be designed.
- the insert surrounds the valve needle at least partially, so that the Piston can also be included within the insert.
- a radial support may be provided when the valve needle has an opening and the piston bears against a support body passing through the opening of the Valve needle is fixed to the insert.
- the opening can be used as a slot be formed to a certain relative movement of the valve needle to the support body to allow for the circuit of the control valve.
- the piston can be inserted into the sleeve-shaped valve needle.
- the outer cylindrical Guide that is formed in the insert.
- a valve seat for the valve needle is preferably formed.
- the production can be simplified, since the use as a prefabricated Component is then inserted into the control valve.
- the flow cross-section expands externally adjacent to the valve seat. Because when opening the valve needle would be adjacent in an area to the sealing edge of the valve seat relatively high pressure forces in the axial Direction act when the fluid on the valve needle can not flow well. For a particularly large extension of the flow cross-section adjacent to the Sealing edge, may at the front end portion of the valve needle radially outward be formed adjacent to the sealing edge a step, so that the flow cross-section extended.
- a valve for the intermittent liquid injection comprises et al a valve housing 1 and a control valve.
- the injection valve is in itself known and may be formed as described in the PCT application PCT / EP04 / 00434 is described.
- the control valve comprises a cylindrical Insert 2, in which a valve needle 3 is guided.
- the valve needle 3 is sleeve-shaped formed and a cylindrical piston 4 is provided within the valve needle 3, which rests against a pin 5.
- the piston 4 and the valve needle 3 are for a switching operation relative to each other movable.
- the valve needle 3 is connected via an intermediate piece 9 with an armature 6, the via a solenoid 7 is movable.
- the solenoid pulls in response to an electrical Impulses during a certain time the anchor 6 and connected to him Valve needle 3 to open the control valve.
- the valve needle 3 is over a spring 8, which bears against the intermediate piece 9, in the closed position biased.
- the valve needle 3, the piston 4, the intermediate piece 9 and the spring 8 are coaxially positioned about an axis 50.
- the piston 4 is held by a pin 5, which is formed by an elongated hole Opening 10 is performed in the valve needle 3.
- valve needle 3 For axial guidance of the valve needle 3 is a cylindrical guide 11 in the Insert 2 is formed and further, a cylindrical guide between the as Pen trained piston 4 and the inner wall of the valve needle 3 is provided.
- the valve needle 3 is relative to the stationarily arranged insert 2, the Piston 4 and the pin 5 movable.
- a chamber 13 is provided, which is in communication with an emptying channel 14.
- a supply passage 15 filled with high pressure fluid is in the valve housing 1 and the insert 2, of which one designed as a throttle Branch 16 leads to a pressure chamber 17.
- the pressure chamber 17 is adjacent arranged to a piston 18, on the opposite side of the pressure chamber 17 abuts an extension of the valve needle 19 of the injection valve.
- the piston 18 moves together with the valve needle 19 of the injector upwards, so that the injection valve a liquid e.g. can inject into a combustion chamber.
- a bore 20 in which the pin 5 is inserted for example with a press fit.
- the Piston 4 the otherwise by the pressure of the fluid in the figures upwards is pressed.
- FIG 3 the front portion of the control valve is shown enlarged, wherein the valve needle 3 is in the closed position.
- a front end portion 21 the valve needle 3 is frusto-conical and with a sealing edge 22nd the valve needle 3 abuts the valve seat 33 of the insert 2.
- valve needle 3 has a through the diameter D and the bore 25 limited pressure surface 23.
- the pressurized fluid passes into an interior space and acts there on the valve needle 3 resulting from the axial force Surface 24 and on the piston 4, the cross-sectional area of diameter D, at the same time the diameter of the guide 12.
- the valve needle 3 are considered. Because the axial Compressive forces on the pressure surfaces 23 and 24 are almost equal and in opposite directions set direction, they pick up.
- valve needle 3 is shown in the open position. That in the Pressure chamber 17 contained fluid can flow into the channel 14, so that the injection valve needle 19 is moved. Once the solenoid 7, the valve needle 3 is not Lifting more due to the force of the spring 8, the valve needle 3 back into the pressed closed position and in the pressure chamber 17, a corresponding builds Pressure on and also closes the injection valve needle 19 of the injector.
- the front end portion the valve needle 3 ' is slightly modified in order to open the valve needle 3 'to reduce the axial forces occurring due to flow resistance.
- a stepped release formed which is composed of two conical surfaces 30 and 31 together.
- the invention is not limited to the illustrated embodiment. Especially the geometry of the end section of the valve needle 3 can be varied, to have 3 defined flow conditions when opening the valve needle.
- the angle W between the stepped portion 30 and a tapered portion 32 may be chosen so as to have optimum flow conditions.
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)
- Magnetically Actuated Valves (AREA)
Abstract
Description
- Figur 1
- eine Schnittansicht eines Ausführungsbeispieles eines erfindungsgemäßen Steuerventils in einem Einspritzventil;
- Figur 2
- eine geschnittene Detailansicht entlang der Linie A-A der Figur 1;
- Figur 3
- eine geschnittene Detailansicht des Steuerventils der Figur 1 mit geschlossener Ventilnadel;
- Figur 4
- eine geschnittene Detailansicht des Steuerventils mit geöffneter Ventilnadel, und
- Figur 5
- eine geschnittene Detailansicht der Ventilnadel gemäß einer modifizierten Ausführungsform.
Claims (10)
- Steuerventil, insbesondere für Einspritzventile für Verbrennungskraftmaschinen, mit einem Ventilgehäuse (1), einer in axialer Richtung bewegbaren Ventilnadel (3), die in einer zylindrischen Führung (11) angeordnet ist, und einem in der beweglichen Ventilnadel (3) angeordneten Kolben (4), dadurch gekennzeichnet, dass in dem Ventilgehäuse (1) ein Einsatz (2) aufgenommen ist, an dem ein Stift (5) und der Kolben (4) gehalten sind.
- Steuerventil nach Anspruch 1, dadurch gekennzeichnet, dass im geschlossenen Zustand der Ventilnadel (3) die durch ein Fluid wirkenden axialen Druckkräfte sich einander im Wesentlichen aufheben.
- Steuerventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Ventilnadel (3) über den Einsatz (2) hervorsteht.
- Steuerventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Ventilnadel (3) eine Öffnung (10) aufweist und der Kolben (4) an einem Stift (5) anliegt, der durch die Öffnung (10) der Ventilnadel (3) an dem Einsatz (2) festgelegt ist.
- Steuerventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Kolben (4) als innerhalb der Ventilnadel (3) angeordneter Stift ausgebildet ist.
- Steuerventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass in dem Einsatz (2) die zylindrische Führung (11) für die Ventilnadel (3) ausgebildet ist.
- Steuerventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass in dem Einsatz (2) ein Ventilsitz (33) für die Ventilnadel (3) ausgebildet ist.
- Steuerventil nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Fläche des Querschnittes einer Dichtkante (22) des Ventilsitzes (33) der Fläche des Querschnittes des Kolbens (4) entspricht.
- Steuerventil nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sich außen benachbart zu der Dichtkante (22) der Strömungsquerschnitt erweitert.
- Steuerventil nach Anspruch 9, dadurch gekennzeichnet, dass der vordere Endabschnitt der Ventilnadel (3') radial nach außen benachbart zu der Dichtkante (22) gestuft ausgebildet ist.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04006631A EP1577540B1 (de) | 2004-03-19 | 2004-03-19 | Steuerventil für ein Einspritzventil |
| DK04006631.8T DK1577540T3 (da) | 2004-03-19 | 2004-03-19 | Styreventil til en brændstofindsprøjtningsventil |
| AT04006631T ATE469298T1 (de) | 2004-03-19 | 2004-03-19 | Steuerventil für ein einspritzventil |
| DE502004011204T DE502004011204D1 (de) | 2004-03-19 | 2004-03-19 | Steuerventil für ein Einspritzventil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04006631A EP1577540B1 (de) | 2004-03-19 | 2004-03-19 | Steuerventil für ein Einspritzventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1577540A1 true EP1577540A1 (de) | 2005-09-21 |
| EP1577540B1 EP1577540B1 (de) | 2010-05-26 |
Family
ID=34833653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04006631A Expired - Lifetime EP1577540B1 (de) | 2004-03-19 | 2004-03-19 | Steuerventil für ein Einspritzventil |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1577540B1 (de) |
| AT (1) | ATE469298T1 (de) |
| DE (1) | DE502004011204D1 (de) |
| DK (1) | DK1577540T3 (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE745480C (de) * | 1941-05-03 | 1944-03-02 | Concordia Maschinen Und Elek Z | Elektromagnetisch betaetigtes Ventil |
| US3680782A (en) * | 1969-10-24 | 1972-08-01 | Sopromi Soc Proc Modern Inject | Electromagnetic injectors |
| US5803429A (en) * | 1995-02-15 | 1998-09-08 | Nippon Soken, Inc. | Solenoid-operated hydraulic control valve for use in fuel injection system for internal combustion engine |
| DE10046829A1 (de) * | 2000-09-20 | 2002-04-04 | Orange Gmbh | Steuerventil für Einspritzinjektoren |
| DE10103089A1 (de) * | 2001-01-24 | 2002-08-08 | Bosch Gmbh Robert | 3/2-Wegeventil |
| US20030172978A1 (en) * | 2001-03-13 | 2003-09-18 | Nestor Rodriguez-Amaya | Seat/sliding valve comprising a pressure compensation pin |
-
2004
- 2004-03-19 AT AT04006631T patent/ATE469298T1/de active
- 2004-03-19 DK DK04006631.8T patent/DK1577540T3/da active
- 2004-03-19 DE DE502004011204T patent/DE502004011204D1/de not_active Expired - Lifetime
- 2004-03-19 EP EP04006631A patent/EP1577540B1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE745480C (de) * | 1941-05-03 | 1944-03-02 | Concordia Maschinen Und Elek Z | Elektromagnetisch betaetigtes Ventil |
| US3680782A (en) * | 1969-10-24 | 1972-08-01 | Sopromi Soc Proc Modern Inject | Electromagnetic injectors |
| US5803429A (en) * | 1995-02-15 | 1998-09-08 | Nippon Soken, Inc. | Solenoid-operated hydraulic control valve for use in fuel injection system for internal combustion engine |
| DE10046829A1 (de) * | 2000-09-20 | 2002-04-04 | Orange Gmbh | Steuerventil für Einspritzinjektoren |
| DE10103089A1 (de) * | 2001-01-24 | 2002-08-08 | Bosch Gmbh Robert | 3/2-Wegeventil |
| US20030172978A1 (en) * | 2001-03-13 | 2003-09-18 | Nestor Rodriguez-Amaya | Seat/sliding valve comprising a pressure compensation pin |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502004011204D1 (de) | 2010-07-08 |
| ATE469298T1 (de) | 2010-06-15 |
| DK1577540T3 (da) | 2010-09-13 |
| EP1577540B1 (de) | 2010-05-26 |
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