EP1062423A1 - Kraftstoffeinspritzventil für brennkraftmaschinen - Google Patents
Kraftstoffeinspritzventil für brennkraftmaschinenInfo
- Publication number
- EP1062423A1 EP1062423A1 EP99964369A EP99964369A EP1062423A1 EP 1062423 A1 EP1062423 A1 EP 1062423A1 EP 99964369 A EP99964369 A EP 99964369A EP 99964369 A EP99964369 A EP 99964369A EP 1062423 A1 EP1062423 A1 EP 1062423A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- upstream
- transition
- transition area
- fuel injection
- 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
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
Definitions
- the invention relates to a fuel injection valve for internal combustion engines according to the preamble of claim 1.
- fuel injection valves are known for example from DE 195 47 423 AI and DE 196 34 133 AI.
- a piston-shaped valve member is axially displaceably guided in a bore in a valve body.
- the valve member has a conical valve sealing surface at its combustion chamber end, with which it interacts with a conical valve seat surface on the valve body, which is formed at the inwardly projecting end of the closed valve bore.
- the valve sealing surface on the valve member is in several, preferably two areas different cone angles, whereby a transition area between the two valve sealing surface areas is provided, which is delimited by a downstream sealing edge and an upstream valve sealing edge.
- the invention is based on the object of developing a fuel injection valve of the generic type in such a way that, due to the axial alignment of the valve member, it produces a symmetrical spray pattern and, moreover, a defined hydraulically effective seat diameter, high damping of the valve member and the lowest possible risk of cavitation.
- the distance between the upstream valve sealing edge and the downstream valve sealing edge of the transition area is chosen so that the upstream valve sealing edge of the transition area forms the hydraulically effective seat diameter.
- the distance can be determined by experimental measurements and / or calculations.
- Figure 1 shows schematically the hydraulically effective seat diameter in a valve known from the prior art.
- Fig. 2 is a fuel injection valve making use of the invention
- FIG. 3 shows an enlarged detail of the fuel injection valve shown in FIG. 2.
- a fuel injection valve for internal combustion engines shown in FIGS. 1 to 3 has a cylindrical valve body 1 which projects with its free lower end in a combustion chamber (not shown) of the internal combustion engine to be supplied with fuel.
- An axial blind bore 3 is provided in the valve body 1, in which a piston-shaped valve member 5 is guided so as to be axially displaceable.
- the valve member 5 has at its lower end near the combustion chamber a conical valve sealing surface 7, with which it cooperates to control an injection cross section with a conical valve seat surface 9 on the combustion chamber end of the valve body 1, which is formed on the inwardly projecting closed end of the bore 3 and by of the injection openings 6 into the combustion chamber of the internal combustion engine seem to run out.
- valve body 1 is divided into an upper region 71 and a lower region.
- a transition region 73 is formed between the upper region 71 and the lower region 72.
- the angle that results from the difference between transition region 73 and valve seat surface 9 must be smaller than the angle that results from the difference between valve seat surface 9 and lower region 72 (inverse seat angle difference).
- Injection openings 20 are provided in the valve body 1 adjacent to the downstream region 72.
- the upstream region 71 of the valve sealing surface has a radial, undercut-shaped recess 74. This forms a space which is delimited on the upstream side by an edge 75 formed on the valve body 1.
- the transition region 73 is defined by an upstream-side valve sealing edge 73a and a stromabwesei- term valve sealing edge 73b, which are arranged adjacent to one another such that the hydraulically 'effective seat diameter coincides with a closing action of the upstream side valve sealing edge 73a. Due to this defined hydraulically effective seat diameter, a resulting radial force on the valve member is prevented, which occurs in the undefined hydraulically effective seat diameter 90 shown in FIG. 1.
- the design of the distance between the two valve sealing edges 73a and 73b is determined experimentally and on the basis of calculations.
- a maximum closing Force of 1250 N which can be determined experimentally, results, for example, in a diameter difference of approximately 0.15 mm with a geometric seat diameter of 2 mm.
- this minimal transition area, ie with this minimal seat adjustment surface it is guaranteed in any case that the hydraulically effective seat diameter exactly coincides with the valve sealing edge 73a.
- the radial recess 74 in the valve member 5 creates a damping space which enables the valve member 5 to be very highly damped during a closing operation.
- the angle that encloses the damping space is preferably chosen so that it is greater than the body seat angle. In this way, a damping chamber is created in the closed state, which produces an effect similar to that of a sail and generates a pressure cushion when closing the valve member 5, which increases the damping of the valve member 5.
- the fuel injection valve closes, the fuel arranged in the damping chamber is displaced and flows out of the damping chamber upstream via the gap formed between the valve member 5 and the edge 75. The damping effect is generated due to the flow resistance created by the gap during the closing process.
- the upstream edge 75 is designed such that in extreme cases there is no distance from the valve body 5 when the valve member is completely deformed. This damping results in a lower tip load.
- Such a fuel injection valve also has the advantage that the bubble collapse of the cavitation bubbles preferably takes place in the area upstream of the edge 75, since the pressure waves originating from the injection pump are kept away from the transition area by the edge 75. This does not damage the seating area.
- valve holding body (not shown) tends to drop in the opening pressure, whereas the valve member 5 tends to rise in the opening pressure due to the inverse seat angle difference. Opposing effects occur, which partially cancel each other out. This increases the service life of the fuel injector.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19901057 | 1999-01-14 | ||
DE19901057A DE19901057A1 (de) | 1999-01-14 | 1999-01-14 | Kraftstoffeinspritzventil für Brennkraftmaschinen |
PCT/DE1999/003723 WO2000042316A1 (de) | 1999-01-14 | 1999-11-24 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1062423A1 true EP1062423A1 (de) | 2000-12-27 |
EP1062423B1 EP1062423B1 (de) | 2004-08-11 |
Family
ID=7894152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99964369A Expired - Lifetime EP1062423B1 (de) | 1999-01-14 | 1999-11-24 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6502554B1 (de) |
EP (1) | EP1062423B1 (de) |
JP (1) | JP4587248B2 (de) |
KR (1) | KR100631298B1 (de) |
DE (2) | DE19901057A1 (de) |
WO (1) | WO2000042316A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10050600A1 (de) * | 2000-10-12 | 2002-04-25 | Siemens Ag | Injektor für eine Kraftstoffeinspritzanlage |
DE10105681A1 (de) * | 2001-02-08 | 2002-08-29 | Siemens Ag | Kraftstoffeinspritzventil für eine Brennkraftmaschine |
EP1522721B1 (de) | 2003-10-06 | 2006-05-03 | Delphi Technologies, Inc. | Einspritzdüse |
DE10359302A1 (de) * | 2003-12-17 | 2005-07-21 | Robert Bosch Gmbh | Ventilkörper mit Mehrfachkegelgeometrie am Ventilstitz |
JP2006307678A (ja) * | 2005-04-26 | 2006-11-09 | Denso Corp | 燃料噴射ノズル |
US20070200011A1 (en) * | 2006-02-28 | 2007-08-30 | Caterpillar Inc. | Fuel injector having nozzle member with annular groove |
WO2014197094A2 (en) * | 2013-03-15 | 2014-12-11 | Schott Corporation | Glass-metal composites and method of manufacture |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1952816A (en) * | 1931-04-04 | 1934-03-27 | Bendix Res Corp | Fuel injector |
JPS6058868U (ja) * | 1983-09-30 | 1985-04-24 | いすゞ自動車株式会社 | バルブシ−ト型燃料噴射ノズル |
JPS60169664A (ja) * | 1984-02-14 | 1985-09-03 | Mitsui Eng & Shipbuild Co Ltd | 超高圧燃料噴射弁 |
SE448828B (sv) * | 1985-06-07 | 1987-03-23 | Ingemanssons Ingenjorsbyra Ab | Munstycke |
JPH0158770U (de) * | 1987-10-07 | 1989-04-12 | ||
JP2819702B2 (ja) * | 1989-12-12 | 1998-11-05 | 株式会社デンソー | 燃料噴射弁 |
US5020500A (en) * | 1990-03-28 | 1991-06-04 | Stanadyne Automotive Corp. | Hole type fuel injector and injection method |
US5159911A (en) * | 1991-06-21 | 1992-11-03 | Cummins Engine Company, Inc. | Hot start open nozzle fuel injection systems |
FI88333C (fi) * | 1991-06-25 | 1993-04-26 | Waertsilae Diesel Int | Foerbaettrat insprutningsventilarrangemang foer braensle |
US5288025A (en) * | 1992-12-18 | 1994-02-22 | Chrysler Corporation | Fuel injector with a hydraulically cushioned valve |
US5449121A (en) * | 1993-02-26 | 1995-09-12 | Caterpillar Inc. | Thin-walled valve-closed-orifice spray tip for fuel injection nozzle |
US5647536A (en) * | 1995-01-23 | 1997-07-15 | Cummins Engine Company, Inc. | Injection rate shaping nozzle assembly for a fuel injector |
US5711277A (en) * | 1995-08-29 | 1998-01-27 | Isuzu Motors Limited | Accumulating fuel injection apparatus |
DE19547423B4 (de) | 1995-12-19 | 2008-09-18 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19634133C2 (de) | 1996-08-23 | 1999-03-11 | Siemens Ag | Mikroprozessor, insbesondere zur Verwendung in einer Chipkarte, sowie Chipkarte mit einem ebensolchen Mikroprozessor |
DE19822503C1 (de) * | 1998-05-19 | 1999-11-25 | Siemens Ag | Steuerventil für Kraftstoffeinspritzventil |
GB9823028D0 (en) * | 1998-10-22 | 1998-12-16 | Lucas Ind Plc | Fuel injector |
-
1999
- 1999-01-14 DE DE19901057A patent/DE19901057A1/de not_active Withdrawn
- 1999-11-24 EP EP99964369A patent/EP1062423B1/de not_active Expired - Lifetime
- 1999-11-24 DE DE59910205T patent/DE59910205D1/de not_active Expired - Lifetime
- 1999-11-24 WO PCT/DE1999/003723 patent/WO2000042316A1/de active IP Right Grant
- 1999-11-24 JP JP2000593859A patent/JP4587248B2/ja not_active Expired - Fee Related
- 1999-11-24 KR KR1020007009967A patent/KR100631298B1/ko not_active IP Right Cessation
- 1999-11-24 US US09/646,189 patent/US6502554B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0042316A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59910205D1 (de) | 2004-09-16 |
KR100631298B1 (ko) | 2006-10-09 |
US6502554B1 (en) | 2003-01-07 |
JP2002535537A (ja) | 2002-10-22 |
DE19901057A1 (de) | 2000-07-27 |
KR20010041733A (ko) | 2001-05-25 |
WO2000042316A1 (de) | 2000-07-20 |
JP4587248B2 (ja) | 2010-11-24 |
EP1062423B1 (de) | 2004-08-11 |
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