EP0923671B1 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP0923671B1 EP0923671B1 EP98924009A EP98924009A EP0923671B1 EP 0923671 B1 EP0923671 B1 EP 0923671B1 EP 98924009 A EP98924009 A EP 98924009A EP 98924009 A EP98924009 A EP 98924009A EP 0923671 B1 EP0923671 B1 EP 0923671B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- area
- fuel injection
- fuel
- piston
- 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
- 239000000446 fuel Substances 0.000 title claims description 54
- 238000002347 injection Methods 0.000 title claims description 34
- 239000007924 injection Substances 0.000 title claims description 34
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- 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
-
- 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
Definitions
- the invention relates to a fuel injection valve the genus of claim 1.
- fuel injection valve is the actuating part of the valve member in one piece with executed the same.
- the valve member has as an actuating part a piston that has on one side its front side limits the control pressure chamber and his other side about a pressure shoulder in an im Diameter passes the smaller part, at the end of which Sealing surface is arranged, which is the injection opening controls.
- the pressure shoulder is exposed to the pressure in the pressure room, who is constantly in with a high pressure fuel accumulator Connection is, which in turn via a throttle in constant Connection to the control pressure chamber is.
- This one has a second outlet controlled by a piezo valve becomes. When this outlet is opened, the pressure in the Control pressure chamber to a relief pressure that causes that the forces in the opening direction, for example, about the shoulder on the valve member, the injector to open.
- FIG. 1 In the figure is a fuel injector schematically shown that with a high-pressure fuel storage 1 Fuel is supplied.
- a high pressure fuel pump 3 sucks 4 fuel from a fuel tank and delivers it with high fuel injection pressure into the High-pressure fuel storage.
- the fuel gets from there via a pressure line 6 into a pressure chamber 7 of the fuel injection valve 8.
- the pressure chamber 7 is upstream a fuel injection opening 9, which leads to the inside Pressure chamber 7 is limited by a valve seat 10 and their connection between the pressure chamber 7 and the combustion chamber 11 of an associated internal combustion engine through a sealing surface 12 is controlled, which at the end of a valve member 14th is provided.
- the valve member has an actuating part 15 and a needle part 16 which is in a guide bore 17 of the Actuating part leaves the pressure chamber 7 free and at the end Sealing surface 12 carries.
- this is conical formed according to a conical valve seat 10.
- a pressure shoulder 18 is formed, the pressure in Pressure chamber 7 is exposed such that from its load an acting in the opening direction of the valve member 14 resulting force is formed.
- the actuating part 15 projects into a hydraulic space 20 in the housing of the fuel injector and points there an annular shoulder 21 which has a compensating pressure surface forms.
- the actuating part 15 leads with one part 15a with reduced diameter from the hydraulic pressure chamber back out and is in a in a control pressure room 23 leading guide bore 24 out. It ends there Actuating part 15 in an end face 26, the pressure in Control pressure chamber 23 is exposed.
- the control pressure room has via a throttle 28 a permanent connection to the high-pressure fuel accumulator. Furthermore leads from the control pressure room 23 a relief channel 29, in which, if necessary, a second Throttle 30 is arranged and by a valve member 31st an electrically controlled valve 32 opened or can be closed.
- valve member 31 If the valve member 31 is opened, so the pressure in the control pressure chamber is reduced to a relief pressure lowered because 29 more via the relief line Fuel flows out than can flow through the throttle 28. By lowering this pressure with the falling, in Closing direction due to this pressure on the valve member acting forces outweigh those via the pressure shoulder 18 hydraulic forces acting on the valve member Opening direction. This means that the valve member is opened and the injection via the injection opening starts. To end this injection process, the Valve member 31 brought back in the closing direction, which for The consequence of this is that fuel that flows quickly in increases the control chamber pressure back to the original value in the amount of Brings fuel pressure in the high-pressure fuel reservoir 1. This high pressure causes a predominant force in Closing direction of the valve member 15 and directs the closing process on.
- the hydraulic can be better controlled Room 20 provided with the compensating pressure surface 21 on the Ring shoulder between the actuating parts 15 and 15a.
- the hydraulic room is closed but can be moved become.
- a piston 33 is provided, which in a the bore opening into the hydraulic space can be moved tightly is stored.
- This piston is designed as a stepped piston with a larger diameter part 35, the first Piston surface 36 limits the hydraulic space 20 and with a part 37 of smaller diameter, the second Piston surface, its end face 38 in a reference pressure space 39 ranges, which in turn with a throttle 40 High-pressure fuel accumulator 1 is connected.
- the piston 33 has a stop 41, which is the displacement of the piston hydraulic space 20 limited.
- the Pressure in the hydraulic pressure chamber can be kept constant namely on one compared to the pressure in the reference pressure space or reduced pressure in the high-pressure fuel reservoir 1.
- This pressure in connection with the compensation pressure area places an additional load on the valve member 14 in Closing direction that remains essentially constant and thus, as a constant factor, the Opening characteristic of the valve member determined.
- the throttle 40 also plays one Role with which the rigidity of the hydraulic column of the hydraulic space 20 and the retroactive force on the Valve member 14 can also be adjusted.
- This throttle correctable to a non-linear force increase in Forces acting on the valve member in the opening direction influence.
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
Claims (8)
- Kraftstoffeinspritzventil mit einem nach innen, entgegen der Krafstoffaustrittsrichtung öffnenden Ventilglied (14), das eine Einspritzöffnung (9) steuernde Dichtfläche (12) aufweist, an der sich stromaufwärts davon ein Druckraum (7) anschließt, der ständig mit einer Kraftstoffhochdruckquelle (1) verbunden ist und von einer Druckschulter (18) am Ventilglied (14) begrenzt ist, welche durch den Druck im Druckraum (7) entgegen einer Schließkraft in Öffnungsrichtung beaufschlagt ist, und mit einem Betätigungsteil (15, 15a) mit einer Druckfläche (26) die zur Betätigung des Ventilgliedes (14) in Schließrichtung entgegen Öffnungskräften dient, welche Druckfläche (26) von einem zwischen einem Arbeitsdruck und einem Entlastungsdruck veränderbaren Steuerdruck in einem Steuerdruckraum (23) ausgesetzt ist, wobei bei einem dort eingestelltem Entlastungsdruck die Öffnungskräfte am Ventilglied (14) überwiegen, dadurch gekennzeichnet, daß eine auf das Ventilglied (14) wirkende Ausgleichsdruckfläche (21) vorgesehen ist, die einen hydraulischen Raum (20) einerseits begrenzt, der andererseits von einer ersten Kolbenfläche (36) eines Kolbens (33) begrenzt ist, wobei der Kolben (33) eine der ersten Kolbenfläche (36) abgewandt zweite Kolbenfläche (38) hat, die von einem Referenzdruck, vorzugsweise einem konstanten Druck, in Schließrichtung des Ventilglieds (14) beaufschlagt ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Kolbenfläche (38) kleiner ist als die erste Kolbenfläche (36) und als Referenzdruck der Druck der Kraftstoffhochdruckquelle dient.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Ausgleichsdruckfläche (21) so bemessen ist, daß bei eingestelltem Entlastungsdruck die Summe der in Schließrichtung wirkenden Kräfte kleiner ist als die Summe der in Öffnungsrichtung wirkenden Kräfte.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die in Schließrichtung wirkenden Kräfte die Summe der sich aus der Druckbeaufschlagung im hydraulischen Raum (20) zuzüglich der sich aus Druckfläche (26) und reduziertem Steuerdruck sich ergebenden Kräfte umfaßt und die in Öffnungsrichtung wirkenden Kräfte die Summe der sich aus der Druckbeaufschlagung der Druckschulter (18) und der Dichtfläche (12) resultierenden Kräfte umfaßt.
- Kraftstoffeinspritzventil nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Betätigungsteil (15, 15a) eine Stirnfläche (26) aufweist, die eine den Steuerdruck aufnehmenden Steuerdruckraum (23) begrenzt, und der Steuerdruckraum mittels eines elektrisch gesteuerten Steuerventils (32) entlastet oder auf den Druck der Kraftstoffhochdruckquelle haltbar ist.
- Kraftstoffeinspritzventil nach Anspruch 5, dadurch gekennzeichnet, daß der Steuerdruckraum (23) über eine erste Drossel (28) ständig mit der Kraftstoffhochdruckquelle (1) verbunden ist und das Steuerventil ein 2/2-Ventil ist, durch das der Steuerdruckraum (23) zur Einleitung der Hochdruckeinspritzung durch das Kraftstoffeinspritzventil (8) auf den Entlastungsdruck entlastbar ist.
- Kraftstoffeinspritzventil nach Anspruch 6, dadurch gekennzeichnet, daß die Entlastung des Steuerdruckraumes (23) über eine zweite Drossel (29) erfolgt.
- Kraftstoffeinspritzventil nach einem der vorstehnenden Ansprüche, dadurch gekennzeichnet, daß der Weg des Kolbens (33) zum hydraulischen Raum (20) hin durch einen Anschlag (41) begrenzt ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19727896A DE19727896A1 (de) | 1997-07-01 | 1997-07-01 | Kraftstoffeinspritzventil |
DE19727896 | 1997-07-01 | ||
PCT/DE1998/000764 WO1999001660A1 (de) | 1997-07-01 | 1998-03-14 | Kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0923671A1 EP0923671A1 (de) | 1999-06-23 |
EP0923671B1 true EP0923671B1 (de) | 2002-06-19 |
Family
ID=7834193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98924009A Expired - Lifetime EP0923671B1 (de) | 1997-07-01 | 1998-03-14 | Kraftstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6367709B2 (de) |
EP (1) | EP0923671B1 (de) |
JP (1) | JP2001500215A (de) |
KR (1) | KR20000068338A (de) |
CN (1) | CN1089855C (de) |
DE (2) | DE19727896A1 (de) |
WO (1) | WO1999001660A1 (de) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19906266A1 (de) * | 1999-02-15 | 2000-08-17 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE19907348A1 (de) | 1999-02-20 | 2000-08-24 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE60022991T2 (de) * | 1999-03-18 | 2006-07-13 | Delphi Technologies, Inc., Troy | Kraftstoffinjektor |
DE19940294A1 (de) | 1999-08-25 | 2001-03-01 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE19940301A1 (de) | 1999-08-25 | 2001-03-01 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE19940289B4 (de) * | 1999-08-25 | 2008-01-31 | Robert Bosch Gmbh | Kraftstoffeinspritzventil |
DE19940292B4 (de) * | 1999-08-25 | 2008-03-06 | Robert Bosch Gmbh | Steuerventil für ein Kraftstoffeinspritzventil |
DE19940293A1 (de) | 1999-08-25 | 2001-03-01 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE19940290A1 (de) * | 1999-08-25 | 2001-03-01 | Bosch Gmbh Robert | Steuerventil für ein Kraftstoffeinspritzventil |
DE19945314A1 (de) * | 1999-09-22 | 2001-04-05 | Bosch Gmbh Robert | Common-Rail-Injektor |
DE19949527A1 (de) * | 1999-10-14 | 2001-04-19 | Bosch Gmbh Robert | Injektor für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen mit in den Ventilsteuerraum ragender Düsennadel |
DE10000575A1 (de) * | 2000-01-10 | 2001-07-19 | Bosch Gmbh Robert | Einspritzdüse |
DE10006111A1 (de) | 2000-02-11 | 2001-08-30 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
US6499467B1 (en) * | 2000-03-31 | 2002-12-31 | Cummins Inc. | Closed nozzle fuel injector with improved controllabilty |
DE10033426B4 (de) * | 2000-07-10 | 2004-10-14 | Robert Bosch Gmbh | Injektor/Düsennadel-Kombination mit steuerraumseitiger Kopplung |
DE10054526A1 (de) * | 2000-11-03 | 2002-05-16 | Bosch Gmbh Robert | Einspritzdüse |
DE10054992A1 (de) * | 2000-11-07 | 2002-06-06 | Bosch Gmbh Robert | Druckgesteuerter Injektor mit Kraftausgleich |
DE10055268A1 (de) * | 2000-11-08 | 2002-05-23 | Bosch Gmbh Robert | Druckgesteuerter Injektor eines Hochdruckspeichereinspritzsystems |
DE10065220A1 (de) * | 2000-12-27 | 2002-07-18 | Bosch Gmbh Robert | Kraftausgeglichenes Steuerventil am Steuerraum eines Kraftstoffinjektors |
DE10121892A1 (de) * | 2001-05-05 | 2002-11-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10131642A1 (de) * | 2001-06-29 | 2003-01-16 | Bosch Gmbh Robert | Kraftstoffinjektor mit variabler Steuerraumdruckbeaufschlagung |
DE10233574B4 (de) * | 2002-07-24 | 2013-05-08 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten |
DE102008005532A1 (de) * | 2008-01-22 | 2009-07-23 | Robert Bosch Gmbh | Kraftstoffinjektor, dessen Steuerventilelement einen Stützbereich aufweist |
DE102010064057A1 (de) * | 2010-12-23 | 2012-06-28 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
CN108547717B (zh) * | 2018-02-08 | 2020-09-29 | 龙口龙泵燃油喷射有限公司 | 电控柴油喷射器 |
CN109236530A (zh) * | 2018-07-26 | 2019-01-18 | 哈尔滨工程大学 | 喷油规律可变的重油电控喷油器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL128320C (de) * | 1965-06-11 | |||
CH495504A (de) * | 1968-08-28 | 1970-08-31 | Sopromi Soc Proc Modern Inject | Brennstoff-Einspritzventil mit elektromagnetischer Betätigung |
NL132979C (de) * | 1968-11-01 | |||
DE2028442A1 (de) | 1970-06-10 | 1971-12-16 | Daimler Benz Ag | Kraftstoffeinspritzventil fur Ver brennungsmotoren |
DE2759255A1 (de) * | 1977-12-31 | 1979-07-12 | Bosch Gmbh Robert | Kraftstoffeinspritzventil fuer brennkraftmaschinen |
JPS57124032A (en) * | 1981-01-24 | 1982-08-02 | Diesel Kiki Co Ltd | Fuel injector |
JPS611859A (ja) * | 1984-06-13 | 1986-01-07 | Nippon Denso Co Ltd | 蓄圧式燃料噴射弁 |
DE19616812B4 (de) * | 1995-04-27 | 2004-09-30 | Nippon Soken, Inc., Nishio | Kraftstoffeinspritzvorrichtung |
-
1997
- 1997-07-01 DE DE19727896A patent/DE19727896A1/de not_active Withdrawn
-
1998
- 1998-03-14 WO PCT/DE1998/000764 patent/WO1999001660A1/de not_active Application Discontinuation
- 1998-03-14 EP EP98924009A patent/EP0923671B1/de not_active Expired - Lifetime
- 1998-03-14 DE DE59804494T patent/DE59804494D1/de not_active Expired - Fee Related
- 1998-03-14 JP JP11506062A patent/JP2001500215A/ja active Pending
- 1998-03-14 CN CN98800914A patent/CN1089855C/zh not_active Expired - Fee Related
- 1998-03-14 KR KR1019997001515A patent/KR20000068338A/ko not_active Application Discontinuation
- 1998-03-14 US US09/254,049 patent/US6367709B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2001500215A (ja) | 2001-01-09 |
KR20000068338A (ko) | 2000-11-25 |
US20010050316A1 (en) | 2001-12-13 |
EP0923671A1 (de) | 1999-06-23 |
DE19727896A1 (de) | 1999-01-07 |
DE59804494D1 (de) | 2002-07-25 |
US6367709B2 (en) | 2002-04-09 |
CN1231019A (zh) | 1999-10-06 |
CN1089855C (zh) | 2002-08-28 |
WO1999001660A1 (de) | 1999-01-14 |
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