EP1320678B1 - Steuerventil für einspritzinjektoren - Google Patents
Steuerventil für einspritzinjektoren Download PDFInfo
- Publication number
- EP1320678B1 EP1320678B1 EP01980409A EP01980409A EP1320678B1 EP 1320678 B1 EP1320678 B1 EP 1320678B1 EP 01980409 A EP01980409 A EP 01980409A EP 01980409 A EP01980409 A EP 01980409A EP 1320678 B1 EP1320678 B1 EP 1320678B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- plunger
- pressure
- sealing
- connection
- 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.)
- Expired - Lifetime
Links
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
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0073—Pressure balanced valves
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
-
- 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid 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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0028—Valves characterised by the valve actuating means hydraulic
- F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
-
- 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
- F02M63/0045—Three-way valves
Definitions
- the invention relates to a control valve for injection injectors of internal combustion engines, in particular of working with accumulator pressure injection, with diesel or heavy fuel oil operated internal combustion engines.
- Injection injectors for internal combustion engines with accumulator pressure injection, with a Injector and one of these associated, acted upon by a controller Control valve are known from EP 0 657 642 A2.
- the control valve points Connection connections to the pressure accumulator, to the injection nozzle and to return to and connects, in the function of a 3/2-way valve, switching-dependent Injector with the accumulator or the return and, in a transitional phase between the two switch positions, injector, accumulator and return.
- the Nozzle needle of the injection nozzle is pressurized with injection medium in the direction of their opening position and by return-side admission in the direction loaded to its closed position, and it opens at switched connection between accumulator and injector.
- control valves for injection injectors according to the The preamble of claim 1 is known, the control piston, the passage connection controls between two duct connections in the sense of a 2/2-way valve, and in With regard to a pressure equalization in both stroke directions, in open and closed state, is provided with a support piston in a for Control piston coaxial receiving bore of the same and against a stop is supported, against which the control piston is displaceable.
- the Receiving bore adjacent the support piston to the through connection of the Channel connections connected support chamber so that the chamber pressure the Control piston and the support piston in opposite directions acted upon and over the cross-sectional area of the support piston or the Receptacle bore given differences in the control piston side Pressure application surfaces can be compensated.
- the invention is based on the object, a control valve of the type mentioned be designed so that further channel connections can be controlled.
- the support piston receiving portion of the control piston the sealing edge bearing area assign the same, which expediently of a valve chamber as part of Through connection between the channel connections is enclosed, so that short lanes as well as a convenient design of the Connection to the support chamber.
- a further annular chamber preferably by a is formed in the reduced diameter portion of the control piston and the one Channel port is assigned so that two of the duct connections on the sealing edge are controlled, and the third on the support piston as a control slide, bringing with Favorable conditions also for influencing the flow conditions in the short circuit phase, in which the control piston with its sealing edge of a migrates to the other sealing limit.
- the receiving bore associated sealing surface which is a conical sealing zone is designed.
- 1 denotes the injection injector, which, like the schema representation according to FIG. 1, an injection nozzle 2 with a nozzle needle 3, which in FIG Direction to its closed position via a provided in a spring chamber 4 Spring assembly 5 is loaded, wherein the spring chamber 4 in the opposite direction to Nozzle needle 3, a pressure chamber 6 connects, in which a pressurizing the Spring assembly 5 in the direction of the closed position of the nozzle needle 3 burdening Hold-down piston 7 is arranged.
- the injection injector 1 comprises a control valve 8 with a control piston 9.
- the control valve 8 controls the connections to the high and low pressure sides, wherein the injection injector 1 high pressure side with a not shown High-pressure accumulator is connected, as for storage pressure systems, in the form of Common rail systems, for example, is known.
- the control valve 8 is controlled via a magnetic plate 10, wherein in Embodiment for power amplification nor a servo control valve 11th is interposed, as it can be used in particular when the required control forces via magnetic actuator 10 are not provided can and / or shifts occur too slowly.
- the control valve 8 associated with and controlled by the control piston 9 Supply duct connections are designated 12 to 14 and in particular in FIG. 2 illustrated, wherein the channel port 12 is for the high-pressure side inlet and connects to the high-pressure accumulator.
- the terminal 13 is located in the Connection to the injection nozzle 2, wherein the associated channel 15, as in Figure 1 schematically illustrated, opens on the pressure chamber 16, so that over the Pressure shoulder 17 of the nozzle needle 3 latter with appropriate pressurization in Opening direction against the inter alia by the spring assembly. 5 applied closing force is raised.
- the return wherein the associated return channel 18 opens via a pressure-holding valve 19 to a reservoir, not shown and is connected to the pressure chamber 6 via a branch line 20.
- a throttle channel 21 leading to the low-pressure side goes out, which low pressure side at least to the pressure chamber 6 a from the inflow to the channel 14th dependent and / or, as a combined Drosseiventil, a predetermined minimum pressure guaranteed.
- the control piston 9 has concentric with the piston axis 22 one of its end face 23rd outgoing receiving bore 24, in which a support piston 25 axially displaceable is guided, which is against a housing-fixed, the receiving bore 24th bridging support beam 26 is supported, which in turn by support fingers 27 of the Control piston 28 of the servo control valve 11 is overlapped, which is against the front side Support 23 of the control piston 9.
- the support beam 26 is located in the transition between a lower housing part 29 which forms the receptacle for the control piston 9, and a upper housing part 30.
- the housing parts 29, 30 are above a plane surface to each other fitting against each other braced.
- the channel connection 12 is in the control piston 9 a reduced diameter annular space 31 associated with the channel connection 13 associated with the valve chamber 32nd is delimited by a sealing edge 33 of the control piston 9, which with a corresponding housing side valve seat the sealing boundary between the Channel terminals 12 and 13 which, in the direction of the upper housing part 30th raised control piston 9, the connection between the channel ports 12 and 13th releases and thereby injecting injection medium via the channel 15 of the pressure chamber 16, so that the nozzle needle 3 against the force of the spring assembly 5 in the opening direction is raised.
- the stroke of the control piston 9 results in an axial offset between the Control piston 9 and arranged in the receiving bore 24 support piston 25, the is designed as a control slide and the connection between the valve chamber 32 and the return-side channel connection 14 controls.
- the over the support piston 25th opposite to the support beam 26 in the receiving bore 24 delimited Support chamber 34, via a transverse channel 35 with the valve chamber 32 in connection is, ab facedbar connected to the return-side channel connection 14, including the Support piston 25 as a spool valve in the embodiment conical sealing surface 36th is assigned, in the transition to the transverse channel 35 from the receiving bore 24th a seat 37 corresponds, so that in the control piston 9 in the direction of the Seat 37 of the receiving bore 24 retracted support piston 25 the Flow connection between the valve chamber 32 and the channel port 14th Is blocked.
- the support chamber 34 is open, by sealing surface 36 and seat 37 formed sealing boundary via connecting channels 38 with an annular channel 39th connected, which is arranged in the periphery of the support piston 25 and in the axial Covering area to radial, 14 expiring on the duct connections Connection holes 40 is located.
- the opening and Closing behavior of the nozzle needle 3 can be taken in the switching phase, if both the connection between the terminals 12 and 13 as well as between the Terminals 13 and 14 is enabled, so that a short circuit condition is given.
- injection start is selected and the corresponding cross sections are tuned so that in case of malfunctioning persistence of Control piston 9 in a corresponding stroke position, or in a beyond going Eisenhubraum, and consequent permanent injection the flowing fuel quantity, preferably including the still on the return effluent fraction, greater than the amount of fuel that is functional clocked injection of the maximum injection quantity would occur, so that a lying in the high-pressure side inlet, not shown quantity limiting valve respond and shut off the high-pressure side inlet.
- the effluent via the return share is a particularly sensitive control possible.
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)
Description
- Figur 1
- eine schematisierte Schnittdarstellung, die den grundsätzlichen Aufbau eines Einspritzinjektors gemäß der Erfindung zeigt,
- Figur 2
- eine stark schematisierte Schnittdarstellung eines Ausschnitts des Einspritzinjektors im Steuerkolbenbereich des Steuerventiles, wobei dieser Ausschnitt mit A in Figur 1 angedeutet ist, und
- Figur 3
- eine weitere Ausschnittsvergrößerung, nunmehr des Ausschnittes B in Figur 2.
Claims (4)
- Steuerventil für einen Einspritzinjektor eines Einspritzsystemes von Brennkraftmaschinen, insbesondere von mit Speicherdruckeinspritzung arbeitenden, diesel- oder schwerölbetriebenen Brennkraftmaschinen, bei denen der Einspritzinjektor eine Einspritzdüse (2) mit einer Düsennadel (3) aufweist, die beaufschlagt mit Einspritzmedium, zwischen einer Schließ- und einer Öffnungsstellung umstellbar ist, sowie zur Beaufschlagung in Öffnungsrichtung über das Steuerventil (8) an die Hochdruckseite (Kanalanschluss 12) des Einspritzsystemes und zur Beaufschlagung in Schließrichtung, bei Sperrung des Anschlusses gegen die Hochdruckseite (Kanalanschluss 12), an die Niederdruckseite (Kanalanschluss 14) des Einspritzsystemes angeschlossen ist, wobei das Steuerventil (8) als 3/2-Wegeventil einen in einer Gehäusebohrung geführten, bezüglich seiner Druckangriffsflächen ausgeglichenen Steuerkolben (9) mit zwei Dichtflächen (33; 37) aufweist, deren eine Dichtfläche (33) an einer den Durchmesser vergrößernden Schulter des Steuerkolbens (9) vorgesehen ist, die einer im Übergang von einem Ringraum (31) des Steuerkolbens (9) auf eine Ventilkammer (32) der Gehäusebohrung liegenden Dichtgrenze zugeordnet ist, welche im Schließzustand, die durch Anschluss an die Hochdruckseite (Kanalanschluss 12) gegebene Beaufschlagung der Düsennadel (3) in Öffnungsrichtung absteuernd, die Verbindung vom Ringraum (31) des Steuerkolbens (9) auf die Ventilkammer (3Z) absperrt, und deren andere Dichtfläche (37) einer in der Verbindung der Ventilkammer (32) zur Niederdruckseite (Kanalanschluss 14) liegenden, niederdruckseitigen, durch die Dichtflächen (36, 37) gebildeten Dichtgrenze zugehört, die im Schließzustand die über eine koaxial im Steuerkolben (9) liegende Bohrung (24) laufende Verbindung zur Niederdruckseite (Kanalanschluss 14) absteuert,
dadurch gekennzeichnet, dass der Steuerkolben (9) durch Abgleich der Druckangriffsflächen mit einem Stützkolben (25) druckausgeglichen ist, der in der in der Verbindung zur Niederdruckseite (Kanalanschluss 14) liegenden Bohrung (24) des Steuerkolbens (9) bei axial lagefester Abstützung verschieblich geführt ist und dass die niederdruckseitige Dichtgrenze durch eine Dichtfläche (36) des Stützkolbens (25) und die zugehörige Dichtfläche (37) im Steuerkolben (9) gebildet ist. - Steuerventil nach Anspruch 1, dadurch gekennzeichnet, dass der Stützkolben (25) dem die Dichtfläche (33) der in der Gehäusebohrung liegenden Dichtgrenze tragenden Bereich des Steuerkolbens (9) zugeordnet ist.
- Steuerventil nach Anspruch 2, dadurch gekennzeichnet, dass der den Stützkolben (25) aufnehmende Bereich des Steuerkolbens (9) einen größeren Durchmesser aufweist als der in Bezug auf die in der Gehäusebohrung liegende Dichtgrenze gegenüberliegende Führüngsbereich des Steuerkolbens (9).
- Steuerventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass über den Stützkolben (25) verlaufende Kanalführungen (Verbindungskanäle 38) vorgesehen sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10046829A DE10046829C2 (de) | 2000-09-20 | 2000-09-20 | Steuerventil für Einspritzinjektoren von Brennkraftmaschinen |
DE10046829 | 2000-09-20 | ||
PCT/EP2001/010819 WO2002025098A1 (de) | 2000-09-20 | 2001-09-19 | Steuerventil für einspritzinjektoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1320678A1 EP1320678A1 (de) | 2003-06-25 |
EP1320678B1 true EP1320678B1 (de) | 2005-11-16 |
Family
ID=7657125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01980409A Expired - Lifetime EP1320678B1 (de) | 2000-09-20 | 2001-09-19 | Steuerventil für einspritzinjektoren |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1320678B1 (de) |
JP (1) | JP3796219B2 (de) |
AT (1) | ATE310161T1 (de) |
DE (3) | DE10046829C2 (de) |
WO (1) | WO2002025098A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1577540B1 (de) * | 2004-03-19 | 2010-05-26 | Dualon International Holding SA | Steuerventil für ein Einspritzventil |
JP5270760B2 (ja) * | 2008-10-10 | 2013-08-21 | ロバート ボッシュ ゲーエムベーハー | 重油コモンレール噴射システムの燃料供給システム |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5035221A (en) * | 1989-01-11 | 1991-07-30 | Martin Tiby M | High pressure electronic common-rail fuel injection system for diesel engines |
DE4341543A1 (de) * | 1993-12-07 | 1995-06-08 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
JPH07332200A (ja) * | 1994-06-08 | 1995-12-22 | Hino Motors Ltd | ディーゼルエンジンの燃料噴射装置 |
DE19605277B4 (de) * | 1995-02-15 | 2004-06-03 | Nippon Soken, Inc., Nishio | Magnetbetätigtes hydraulisches Steuerventil zur Verwendung im Kraftstoffeinspritzsystem eines Verbrennungsmotors |
DE19742073A1 (de) * | 1997-09-24 | 1999-03-25 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
-
2000
- 2000-09-20 DE DE10046829A patent/DE10046829C2/de not_active Expired - Fee Related
- 2000-09-20 DE DE10066102A patent/DE10066102B4/de not_active Expired - Fee Related
-
2001
- 2001-09-19 JP JP2002528670A patent/JP3796219B2/ja not_active Expired - Fee Related
- 2001-09-19 DE DE50108105T patent/DE50108105D1/de not_active Expired - Lifetime
- 2001-09-19 WO PCT/EP2001/010819 patent/WO2002025098A1/de active IP Right Grant
- 2001-09-19 AT AT01980409T patent/ATE310161T1/de active
- 2001-09-19 EP EP01980409A patent/EP1320678B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2004509282A (ja) | 2004-03-25 |
DE10066102B4 (de) | 2004-12-16 |
DE50108105D1 (de) | 2005-12-22 |
WO2002025098A1 (de) | 2002-03-28 |
ATE310161T1 (de) | 2005-12-15 |
JP3796219B2 (ja) | 2006-07-12 |
DE10046829C2 (de) | 2003-01-09 |
DE10066102A1 (de) | 2003-05-28 |
DE10046829A1 (de) | 2002-04-04 |
EP1320678A1 (de) | 2003-06-25 |
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