WO2001014719A1 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- WO2001014719A1 WO2001014719A1 PCT/DE2000/002734 DE0002734W WO0114719A1 WO 2001014719 A1 WO2001014719 A1 WO 2001014719A1 DE 0002734 W DE0002734 W DE 0002734W WO 0114719 A1 WO0114719 A1 WO 0114719A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle needle
- fuel injection
- injection valve
- compensating
- actuating part
- Prior art date
Links
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
- 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
- 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
- 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 with a valve body, in which a nozzle needle is slidably mounted, an actuating part on which the nozzle needle is supported and which is connected to a control pressure chamber, and a compensation chamber with which a compensation piston is connected.
- Such a fuel injection valve is known from DE 197 27 896 AI.
- the compensation space serves to compensate for an opening force which acts on the nozzle needle after it has been opened. This occurs because when the nozzle needle is lifted from its valve seat, an additional surface is acted upon by high pressure, so that forces increasing in the opening direction act on the nozzle needle up to a limit value.
- a compensating force counteracting the opening force is provided in the compensation space.
- the actuating part is provided with an annular shoulder which lies in the interior of the compensation space.
- the compensation chamber is filled with a liquid, for example the fuel to be injected, so that a hydraulic chamber is formed which is closed, but the volume of which can be shifted by displacing the compensation piston.
- the fuel injection valve according to the invention with the features of the characterizing part of patent claim 1 has the advantage that the compensating force can be provided in a simpler manner without the need for a hydraulic space between the actuating part and the compensating piston.
- the spring element is formed by at least one plate spring.
- a plate spring or a plate spring package has the advantage that a characteristic curve is achieved which shows a very small increase in the spring force over the spring travel in a certain range. An essentially constant closing force can thus be achieved.
- the compensating piston is arranged concentrically to the longitudinal axis of the actuating part. This results in a particularly compact design of the fuel injection valve.
- the compensating piston is annular and surrounds the actuating part, that the compensating space is an annular space which surrounds the actuating part and is closed on one side by the compensating piston, and that the actuating part is provided with a collar to which the spring is supported. This design results in a very compact design of the fuel injection valve in the axial direction.
- the actuating part is provided at the end facing away from the nozzle needle with a support disk on which the spring is supported, and that the compensating piston is arranged opposite the support disk on its side facing away from the nozzle needle is provided with an extension that closes one side of the compensation space.
- two stops for the compensating piston are formed on the valve body and determine the end positions of the compensating piston.
- positions for the compensation piston are specified which ensure correct operation of the fuel injection valve.
- FIG. 1 is a schematic sectional view of an inventive fuel injection valve according to a first embodiment
- - Figure 2 is a schematic sectional view of an inventive fuel injection valve according to a second embodiment
- FIG. 3 shows the course of the dynamic opening force for a fuel injection valve according to the invention.
- FIG. 1 shows a 2/2 fuel injection valve for a so-called “common rail” injection system.
- the injection valve has a valve body 10, in which a nozzle needle 12 is slidably arranged. This interacts with a valve seat 14 in order to control the injection of fuel made available via a supply line 16 into a cylinder of an internal combustion engine (not shown).
- An actuating part 18 is supported on the nozzle needle 12, the end face of which, facing away from the nozzle needle 12, closes off a control pressure chamber 20.
- An annular leakage current collecting space 17 is formed in the valve body 10 and surrounds the actuating part 18.
- a supply line 22 connected to the supply line 16 and in which an inlet throttle is arranged leads to the control pressure chamber 20.
- An outlet line 24 leads from the control pressure chamber 20, in which an outlet throttle is arranged and which is controlled by a control valve 26.
- the fuel pressure acting in the control pressure chamber 20 When the control valve 26 is closed, the fuel pressure acting in the control pressure chamber 20 generates a closing force that is greater than an opening force generated by the fuel in the region of the nozzle needle 12.
- the nozzle needle 12 thus rests on the valve seat 14 and no fuel is injected.
- the control valve 26 When the control valve 26 is opened, the pressure in the control pressure chamber drops due to the outflowing fuel, so that the opening force generated in the area of the nozzle needle 12 becomes greater than that in the area of the control pressure room 20 generated closing force.
- the nozzle needle 12 can lift off the valve seat 14 and fuel is injected.
- a closing force is exerted on the actuating part 18, which leads to the closing of the nozzle needle 12.
- This opening force is dynamic and is shown in FIG. 3 as an example for four different fuel pressures in the common rail injection system by curves 1, 2, 3 and 4.
- a compensation system is provided which exerts a compensation force on the actuating part.
- the compensation system consists of an annular compensation chamber 30 which surrounds the actuating part 18 and is closed on one side by an annular compensation piston 32.
- the compensation chamber 30 is connected to the supply line 16 via a supply line 34.
- the actuating part 18 is provided with a collar 36 which is arranged in a spring chamber 38.
- a disc spring assembly 40 is arranged between the collar 36 and the end face of the compensating piston 32 facing the nozzle needle 12.
- the disc spring assembly has a spring stiffness of approximately 4 N per micrometer.
- FIG. 2 shows a fuel injection valve according to the invention in accordance with a second embodiment. This differs from the first embodiment in terms of the design of the compensation system.
- the actuating part 18 is provided with a support disk 50 against which the plate spring 40 rests.
- the compensating piston 32 which is provided with an extension 52, is arranged opposite the support disk 50. This closes one side of the compensation space 30.
- the operation of the compensation system corresponds to that of the compensation system of the first embodiment.
- Two stops 60, 62 are formed in the valve body 10, by which end positions for the compensating piston 32 are determined. The stops ensure that a function of the compensation system is possible even with an excessively high and an excessively low pressure in the supply line 16.
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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/830,275 US6722579B1 (en) | 1999-08-25 | 2000-08-12 | Fuel injection valve |
JP2001518568A JP2003507644A (ja) | 1999-08-25 | 2000-08-12 | 燃料噴射弁 |
EP00967522A EP1125051A1 (de) | 1999-08-25 | 2000-08-12 | Kraftstoffeinspritzventil |
KR1020017005111A KR20010080312A (ko) | 1999-08-25 | 2000-08-12 | 연료 분사 밸브 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19940293.0 | 1999-08-25 | ||
DE19940293A DE19940293A1 (de) | 1999-08-25 | 1999-08-25 | Kraftstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001014719A1 true WO2001014719A1 (de) | 2001-03-01 |
Family
ID=7919548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/002734 WO2001014719A1 (de) | 1999-08-25 | 2000-08-12 | Kraftstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US6722579B1 (de) |
EP (1) | EP1125051A1 (de) |
JP (1) | JP2003507644A (de) |
KR (1) | KR20010080312A (de) |
DE (1) | DE19940293A1 (de) |
WO (1) | WO2001014719A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10121892A1 (de) * | 2001-05-05 | 2002-11-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
JP4167230B2 (ja) | 2004-01-13 | 2008-10-15 | デルファイ・テクノロジーズ・インコーポレイテッド | 燃料噴射装置 |
JP4473185B2 (ja) * | 2005-07-01 | 2010-06-02 | 本田技研工業株式会社 | 化成処理方法、化成処理剤、及び化成処理部材 |
JP4609351B2 (ja) * | 2006-03-17 | 2011-01-12 | 株式会社デンソー | インジェクタ |
DE102013206417A1 (de) * | 2013-04-11 | 2014-10-16 | Robert Bosch Gmbh | Ventil zum Zumessen von Fluid |
DK178692B1 (en) * | 2015-04-22 | 2016-11-21 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | A fuel valve for a large two-stroke self-igniting internal combustion engine |
GB2549479A (en) * | 2016-04-18 | 2017-10-25 | Delphi Int Operations Luxembourg Sarl | Fuel injector |
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 |
CN112065627A (zh) * | 2020-09-04 | 2020-12-11 | 温州弘腾科技有限公司 | 一种压力平衡喷油嘴的面积补偿制造方法以及由该方法制得的压力平衡喷油 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0393590A2 (de) * | 1989-04-17 | 1990-10-24 | Nippondenso Co., Ltd. | Brennstoffeinspritzeinrichtung für Dieselmotoren |
EP0459429A1 (de) * | 1990-05-29 | 1991-12-04 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzventil |
EP0529630A1 (de) * | 1991-08-30 | 1993-03-03 | Nippondenso Co., Ltd. | Brennstoffeinspritzvorrichtung für Brennkraftmaschine |
EP0829641A2 (de) * | 1996-08-31 | 1998-03-18 | Isuzu Motors Limited | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
DE19727896A1 (de) | 1997-07-01 | 1999-01-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4306072C2 (de) * | 1993-02-26 | 1994-12-08 | Siemens Ag | Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung |
DE4325904C2 (de) * | 1993-08-02 | 1995-07-20 | Daimler Benz Ag | Für eine Dieselbrennkraftmaschine vorgesehene Kraftstoffeinspritzanlage mit einer den Kraftstoff fördernden Hochdruckpumpe in eine gemeinsame Versorgungsleitung (Common-Rail) für alle Einspritzdüsen |
DE19500706C2 (de) * | 1995-01-12 | 2003-09-25 | Bosch Gmbh Robert | Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen |
JP3740733B2 (ja) * | 1996-02-13 | 2006-02-01 | いすゞ自動車株式会社 | 内燃機関の燃料噴射装置 |
DE19907348A1 (de) * | 1999-02-20 | 2000-08-24 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
-
1999
- 1999-08-25 DE DE19940293A patent/DE19940293A1/de not_active Withdrawn
-
2000
- 2000-08-12 WO PCT/DE2000/002734 patent/WO2001014719A1/de not_active Application Discontinuation
- 2000-08-12 US US09/830,275 patent/US6722579B1/en not_active Expired - Fee Related
- 2000-08-12 JP JP2001518568A patent/JP2003507644A/ja active Pending
- 2000-08-12 KR KR1020017005111A patent/KR20010080312A/ko not_active Application Discontinuation
- 2000-08-12 EP EP00967522A patent/EP1125051A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0393590A2 (de) * | 1989-04-17 | 1990-10-24 | Nippondenso Co., Ltd. | Brennstoffeinspritzeinrichtung für Dieselmotoren |
EP0459429A1 (de) * | 1990-05-29 | 1991-12-04 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzventil |
EP0529630A1 (de) * | 1991-08-30 | 1993-03-03 | Nippondenso Co., Ltd. | Brennstoffeinspritzvorrichtung für Brennkraftmaschine |
EP0829641A2 (de) * | 1996-08-31 | 1998-03-18 | Isuzu Motors Limited | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
DE19727896A1 (de) | 1997-07-01 | 1999-01-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
Non-Patent Citations (1)
Title |
---|
See also references of EP1125051A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20010080312A (ko) | 2001-08-22 |
DE19940293A1 (de) | 2001-03-01 |
JP2003507644A (ja) | 2003-02-25 |
EP1125051A1 (de) | 2001-08-22 |
US6722579B1 (en) | 2004-04-20 |
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