EP1334272A1 - Injektor zum einspritzen von kraftstoff in einen brennraum - Google Patents
Injektor zum einspritzen von kraftstoff in einen brennraumInfo
- Publication number
- EP1334272A1 EP1334272A1 EP01993757A EP01993757A EP1334272A1 EP 1334272 A1 EP1334272 A1 EP 1334272A1 EP 01993757 A EP01993757 A EP 01993757A EP 01993757 A EP01993757 A EP 01993757A EP 1334272 A1 EP1334272 A1 EP 1334272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- housing
- recess
- actuator housing
- actuator
- 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 description 9
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract 4
- 230000007797 corrosion Effects 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 9
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 238000007373 indentation Methods 0.000 abstract 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 229920001973 fluoroelastomer Polymers 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
- 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
- F02M61/166—Selection of particular materials
-
- 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
-
- 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
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
Definitions
- Injector for injecting fuel into a combustion chamber
- the invention relates to an injector for injecting fuel into a combustion chamber.
- Such an injector usually has an actuator that controls an injection valve. If the injector is opened by the actuator, fuel is injected into a combustion chamber.
- the actuator actuates a servo valve, which in turn hydraulically opens and closes the injection valve.
- the actuator can be controlled electrically.
- the actuator consists of piezoelectric elements and expands when an electrical voltage is applied.
- the actuator 10 ⁇ is generally arranged in an actuator housing P, while the injection valve (not shown) and / or the servo valve, which for example comprises a valve piston ⁇ ⁇ and a valve mushroom 7, are arranged in an injector housing 1.
- the valve mushroom 7 ⁇ separates a control chamber 8 ⁇ from a return line 15.
- the injector housing 1 has a recess 2 ⁇ into which a part of the actuator housing 4 is inserted.
- the recess 2 of the injector 1 comprises a first bottom, the ⁇ as a circumferential surface 3 is formed on the actuator housing. 4 In the middle of this recess 2 there is a further recess 5 ⁇ in which the servo valve and / or the injection valve are arranged. After the actuator housing 4 has been inserted into the injector housing 1, the actuator 10 can be arranged in the further recess 5 Actuate valve device that includes the servo valve and the injector. A longitudinal expansion of the actuator 10 moves the valve piston 6 in the direction of the valve mushroom 7 and lifts it against its force against a spring 9 ⁇ . The pressure drop in the control chamber 8 ⁇ hydraulically opens the injection valve.
- a suitable adjusting disk E is arranged on the top surface 3 ⁇ of the injector housing ⁇ .
- the actuator housing 4 ⁇ has a circumferential recess 11 on its lateral surface, in which the seal 13, for example an O-ring seal, is arranged. Because of the recess 11, the actuator housing 4 ⁇ has a projection 12 ⁇ which is directed laterally.
- the seal is stretched around the actuator housing.
- the actuator housing is then pushed into the injector housing.
- the seal rubs against the side walls of the recess in the injector housing. This is particularly a disadvantage if the depression is to be lined with a corrosion protection layer. It has been found that the friction between the seal and the corrosion protection layer is so great that either the actuator housing cannot be inserted into the injector housing, or the seal is destroyed when the actuator housing is inserted into the injector housing.
- the invention has for its object to provide an injector for injecting fuel into a combustion chamber, in which the application of a corrosion protection layer in the combustion c ⁇ c ⁇ M r P 1 P 1 c ⁇ o c ⁇ o C ⁇ o c ⁇
- DJ ⁇ ⁇ P d li d ⁇ rt DJ
- PD DJ ⁇ C ⁇ ⁇ C d Q P- ⁇ ⁇ ⁇ dd P- d tr ⁇ d iQ d cn odd rt ⁇ cn ⁇ P ⁇ OPP ⁇ tr P- P ⁇ Hi , Cfl co et ⁇ ⁇ Q ⁇ ⁇ Q?
- P DJ P DJ P- ⁇ a P d ⁇ rt ⁇ d ⁇ d rt rt 3 P 1 P o ⁇ ⁇ 3 h- 1 d O P- ⁇ d P- ⁇ tr iQ d ⁇ ⁇ P ⁇ tr ⁇ P- P - iQ rt iQ P- P C ⁇ DJ rt P ⁇ DJ: P et cn C ⁇ C ⁇
- the actuator housing is inserted into the recess of the injector housing.
- the recess on the underside of the actuator housing can be designed such that the underside of the actuator housing has two projections: an inner projection and an outer projection surrounding the inner one.
- the seal is arranged between the inner projection and the outer projection.
- the recess on the underside of the actuator housing is preferably such that the underside of the actuator housing has only a single circumferential projection around which the seal is stretched. In this case there is no external lead.
- the seal can be inserted more easily into the recess.
- Another advantage is that the depression of the injector housing can be produced with less effort, which is explained below.
- the groove edge of the injector housing between the side walls of the depression and the top surface of the injector housing is first rounded.
- An actuator housing with non-rounded edges cannot be inserted into such a depression as far as the top surface of the injector housing.
- the recess must first be processed further by widening the groove edges so that the edges of the actuator housing fit into the widened groove edges. This additional measure can be dispensed with if the recess on the underside of the actuator housing is such that the underside has only a single circumferential projection.
- the outer disturbing edge of the actuator housing is not present at all. It is, so to speak, a strong rounding of the edge.
- the depression of the injector housing can consequently be produced with less effort.
- there is also a widening of the groove edge of the injector housing disadvantageous for the strength of the injector compared to high pressure, since increased notch stresses occur.
- the depression of the injector housing is preferably lined with a corrosion protection layer.
- the corrosion protection layer essentially consists of zinc phosphate, for example.
- the seal can be made essentially of an elastomer, such as. B. fluororubber exist.
- the projection is designed such that its surface facing the side surface of the depression of the injector housing is inclined.
- the inclination is such that the projection in the area of the attachment surface of the injector housing is closer to the side surfaces of the depression than in the area of its attachment.
- FIG. 2 shows a cross section through part of an injector with an actuator, an actuator housing, a seal, a projection, a recess, a depression, an attachment surface, a further depression, a valve piston, a valve mushroom, a control chamber and an injector housing.
- the injector has an injector housing 1 with a recess 2.
- the depression 2 of the injector housing 1 is lined with an approximately 2-3 ⁇ m thick corrosion protection layer 14.
- the corrosion protection layer 14 consists of zinc phosphate. co co IMP 1 P 1
- valve mushroom 7 If the valve mushroom 7 is raised from its seat by actuation of the actuator 10, the pressure of the fuel in the control chamber 8 drops. As a result, an injection valve (not shown) is lifted from its seat hydraulically, so that fuel is injected into a combustion chamber.
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)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10055639A DE10055639A1 (de) | 2000-11-10 | 2000-11-10 | Injektor zum Einspritzen von Kraftstoff in einen Brennraum |
| DE10055639 | 2000-11-10 | ||
| PCT/DE2001/004168 WO2002038942A1 (de) | 2000-11-10 | 2001-11-06 | Injektor zum einspritzen von kraftstoff in einen brennraum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1334272A1 true EP1334272A1 (de) | 2003-08-13 |
| EP1334272B1 EP1334272B1 (de) | 2004-05-26 |
Family
ID=7662757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01993757A Expired - Lifetime EP1334272B1 (de) | 2000-11-10 | 2001-11-06 | Injektor zum einspritzen von kraftstoff in einen brennraum |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7025292B2 (de) |
| EP (1) | EP1334272B1 (de) |
| DE (2) | DE10055639A1 (de) |
| WO (1) | WO2002038942A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10338080A1 (de) * | 2003-08-19 | 2005-03-10 | Bosch Gmbh Robert | Rohrfeder für Aktor |
| EP1500810A1 (de) * | 2004-01-29 | 2005-01-26 | Siemens VDO Automotive S.p.A. | Aktoreinheit |
| US20070113828A1 (en) * | 2005-11-22 | 2007-05-24 | Fonville Carl E | Fuel injector isolating and sealing member |
| US7429815B2 (en) * | 2006-06-23 | 2008-09-30 | Caterpillar Inc. | Fuel injector having encased piezo electric actuator |
| US20080022974A1 (en) * | 2006-07-28 | 2008-01-31 | Caterpillar Inc. | Multi-stage relief valve having different opening pressures |
| US7950596B2 (en) * | 2008-06-27 | 2011-05-31 | Caterpillar Inc. | Distributed stiffness biasing spring for actuator system and fuel injector using same |
| FR3013392B1 (fr) * | 2013-11-21 | 2017-12-29 | Continental Automotive France | Procede de surveillance d'un injecteur de carburant d'un moteur a combustion interne d'un vehicule |
| CH710127A1 (de) * | 2014-09-17 | 2016-03-31 | Ganser Crs Ag | Brennstoffeinspritzventil für Verbrennungskraftmaschinen. |
| JP2019100208A (ja) * | 2017-11-29 | 2019-06-24 | 株式会社デンソー | 燃料噴射弁 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1015412A (en) * | 1962-03-24 | 1965-12-31 | Seetru Ltd | Improvements in and relating to resilient sealing rings for fluid valves |
| USRE27896E (en) * | 1965-11-06 | 1974-01-22 | Method of forming a copper containing protective coating prior to electro- deposition of paint | |
| JPS5269898A (en) * | 1975-12-09 | 1977-06-10 | Nippon Paint Co Ltd | Production of phosphate pigment |
| IT220663Z2 (it) * | 1990-10-31 | 1993-10-08 | Elasis Sistema Ricerca Fita Nel Mezzogiorno Soc.Consortile P.A. | Perfezionamenti all'assemblaggio del nucleo di un elettromagnete in un iniettore elettromagnetico per sistemi di iniezione del combustibile di motori a combustione interna |
| US5289627A (en) * | 1992-12-18 | 1994-03-01 | Chrysler Corporation | Fuel injector assembly and calibration method |
| IT1264720B1 (it) * | 1993-10-26 | 1996-10-04 | Weber Srl | Valvola dosatrice e polverizzatrice di carburante ad azionamento elettromagnetico. |
| JP2932250B2 (ja) * | 1995-01-31 | 1999-08-09 | キヤノン株式会社 | 電子放出素子、電子源、画像形成装置及びそれらの製造方法 |
| US5577666A (en) * | 1995-08-15 | 1996-11-26 | Siemens Automotive Corporation | Air assist atomizer for a split stream fuel injector |
| JP3329998B2 (ja) * | 1995-10-17 | 2002-09-30 | 三菱電機株式会社 | 筒内噴射用燃料噴射弁 |
| JPH1047199A (ja) * | 1996-07-31 | 1998-02-17 | Mitsubishi Electric Corp | 筒内噴射用燃料噴射弁 |
| JP3384692B2 (ja) * | 1996-07-31 | 2003-03-10 | 三菱電機株式会社 | 筒内噴射用燃料噴射弁 |
| US5753316A (en) * | 1997-01-14 | 1998-05-19 | Ppg Industries, Inc. | Treatment of metal parts to provide improved sealcoat coatings |
| JPH10220319A (ja) * | 1997-02-06 | 1998-08-18 | Denso Corp | 燃料噴射弁 |
| DE19821768C2 (de) * | 1998-05-14 | 2000-09-07 | Siemens Ag | Dosiervorrichtung und Dosierverfahren |
| DE19856617A1 (de) * | 1998-12-08 | 2000-06-21 | Siemens Ag | Element zur Übertragung einer Bewegung und Einspritzventil mit einem solchen Element |
| DE19902260C2 (de) * | 1999-01-21 | 2001-01-25 | Siemens Ag | Stellantrieb für einen Kraftstoffinjektor |
| DE19908420A1 (de) * | 1999-02-26 | 2000-05-25 | Siemens Ag | Steuerventil zur Steuerung des Servodruckes für die Einspritzanlage eines Dieselmotors |
| DE19915654C2 (de) * | 1999-04-07 | 2003-02-20 | Siemens Ag | Kraftstoffeinspritzventil für eine Brennkraftmaschine |
| DE19921242C1 (de) * | 1999-05-07 | 2000-10-26 | Siemens Ag | Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens |
-
2000
- 2000-11-10 DE DE10055639A patent/DE10055639A1/de not_active Ceased
-
2001
- 2001-11-06 EP EP01993757A patent/EP1334272B1/de not_active Expired - Lifetime
- 2001-11-06 DE DE50102438T patent/DE50102438D1/de not_active Expired - Lifetime
- 2001-11-06 WO PCT/DE2001/004168 patent/WO2002038942A1/de not_active Ceased
-
2003
- 2003-05-09 US US10/435,234 patent/US7025292B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0238942A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030226912A1 (en) | 2003-12-11 |
| WO2002038942A1 (de) | 2002-05-16 |
| DE50102438D1 (de) | 2004-07-01 |
| US7025292B2 (en) | 2006-04-11 |
| EP1334272B1 (de) | 2004-05-26 |
| DE10055639A1 (de) | 2002-05-23 |
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