EP0923671A1 - Kraftstoffeinspritzventil - Google Patents
KraftstoffeinspritzventilInfo
- Publication number
- EP0923671A1 EP0923671A1 EP98924009A EP98924009A EP0923671A1 EP 0923671 A1 EP0923671 A1 EP 0923671A1 EP 98924009 A EP98924009 A EP 98924009A EP 98924009 A EP98924009 A EP 98924009A EP 0923671 A1 EP0923671 A1 EP 0923671A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- fuel injection
- piston
- injection valve
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 57
- 238000002347 injection Methods 0.000 title claims abstract description 40
- 239000007924 injection Substances 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 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
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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
- a fuel injection valve is shown schematically, which is supplied with fuel from a high-pressure fuel accumulator 1.
- a high-pressure fuel pump 3 draws fuel from a fuel reservoir 4 and delivers it with high fuel injection pressure into the high-pressure fuel reservoir. From there, the fuel passes through a pressure line 6 into a pressure chamber 7 of the fuel injection valve 8.
- the pressure chamber 7 is located upstream of a fuel injection opening 9, which is delimited towards the inside by a valve seat 10 and the connection between the pressure chamber 7 and the pressure chamber 7
- Combustion chamber 11 of an associated internal combustion engine is controlled by a sealing surface 12 which is provided at the end of a valve member 14.
- the actuating part 15 projects into a hydraulic space 20 in the housing of the fuel injection valve and has an annular shoulder 21 there, which forms a compensating pressure surface.
- the actuating part 15 leads with a part 15a with a reduced diameter out of the hydraulic pressure chamber and is guided in a guide bore 24 opening into a control pressure chamber 23.
- There the actuating part 15 ends in an end face 26 which is exposed to the pressure in the control pressure chamber 23.
- the control pressure chamber has a permanent connection to the high-pressure fuel accumulator via a throttle 28.
- a relief duct 29 leads from the control pressure chamber 23, in which a second one may be provided
- Throttle 30 is arranged and which can be opened or closed by a valve member 31 of an electrically controlled valve 32. If the valve member 31 is opened, the pressure in the control pressure chamber is reduced to a relief pressure, since more fuel flows out via the relief line 29 than can flow in via the throttle 28. When this pressure is reduced, the sinking forces acting on the valve member in the closing direction due to this pressure outweigh the hydraulic forces acting on the valve member via the pressure shoulder 18 in the opening direction. This means that the valve member is opened and the injection via the injection opening begins. At the end of this injection process, the valve member 31 is brought back in the closing direction, which has the consequence that rapidly flowing fuel brings the room pressure back to the original value at the level of the fuel pressure in the high-pressure fuel reservoir 1. This high pressure causes a predominant force in the closing direction of the valve member 15 and initiates the closing process.
- the hydraulic space 20 is provided according to the invention with the compensating pressure surface 21 on the annular shoulder between the actuating parts 15 and 15a.
- the hydraulic room is closed, but can be moved.
- a piston 33 is provided, which is mounted in a sealingly displaceable manner in a bore opening into the hydraulic space.
- This piston is designed as a stepped piston with a part 35 with a larger diameter, the first piston surface 36 of which delimits the hydraulic chamber 20, and with a part 37 with a smaller diameter, the second piston surface, with its end face 38 in a reference pressure chamber 39 is sufficient, which in turn is connected to the high-pressure fuel accumulator 1 via a throttle 40.
- the piston 33 has a stop 41 which limits the displacement of the piston towards the hydraulic space 20.
- the smallest fuel injection quantities can be injected more precisely with such a fuel injection valve.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19727896 | 1997-07-01 | ||
DE19727896A DE19727896A1 (de) | 1997-07-01 | 1997-07-01 | Kraftstoffeinspritzventil |
PCT/DE1998/000764 WO1999001660A1 (de) | 1997-07-01 | 1998-03-14 | Kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0923671A1 true EP0923671A1 (de) | 1999-06-23 |
EP0923671B1 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2816366A1 (fr) * | 2000-11-07 | 2002-05-10 | Bosch Gmbh Robert | Injecteur commande en pression avec equilibrage des forces |
Families Citing this family (25)
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 |
EP1163440B1 (de) * | 1999-03-18 | 2005-10-05 | Delphi Technologies, Inc. | Kraftstoffinjektor |
DE19940293A1 (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 |
DE19940294A1 (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 |
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 US US09/254,049 patent/US6367709B2/en not_active Expired - Fee Related
- 1998-03-14 DE DE59804494T patent/DE59804494D1/de not_active Expired - Fee Related
- 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 JP JP11506062A patent/JP2001500215A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9901660A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2816366A1 (fr) * | 2000-11-07 | 2002-05-10 | Bosch Gmbh Robert | Injecteur commande en pression avec equilibrage des forces |
Also Published As
Publication number | Publication date |
---|---|
CN1231019A (zh) | 1999-10-06 |
DE19727896A1 (de) | 1999-01-07 |
WO1999001660A1 (de) | 1999-01-14 |
US6367709B2 (en) | 2002-04-09 |
KR20000068338A (ko) | 2000-11-25 |
US20010050316A1 (en) | 2001-12-13 |
EP0923671B1 (de) | 2002-06-19 |
DE59804494D1 (de) | 2002-07-25 |
JP2001500215A (ja) | 2001-01-09 |
CN1089855C (zh) | 2002-08-28 |
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