EP1891324A1 - Fuel injection valve for internal combustion engines - Google Patents
Fuel injection valve for internal combustion enginesInfo
- Publication number
- EP1891324A1 EP1891324A1 EP06743259A EP06743259A EP1891324A1 EP 1891324 A1 EP1891324 A1 EP 1891324A1 EP 06743259 A EP06743259 A EP 06743259A EP 06743259 A EP06743259 A EP 06743259A EP 1891324 A1 EP1891324 A1 EP 1891324A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- needle
- blind hole
- fuel injection
- needle tip
- 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
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
-
- 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
- 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
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
Definitions
- Combustion chamber of an internal combustion engine are used, a plurality of injection ports, but at least one injection port are generally provided.
- the fuel injection valves in this case control the injection of compressed and thus pressurized fuel by the longitudinal movement of a Ventilna- del, which has a valve sealing surface and cooperates with a body seat.
- the blind-hole nozzles have the advantage that the distribution of the fuel to the individual injection openings takes place uniformly, as a result of which a more uniform spray pattern is generally achieved than with seat-hole nozzles.
- the problem arises that the fuel which passes between the valve sealing surface and the body seat, is swirled when passing into the blind hole, so that the effective, applied to the injection openings injection pressure is reduced.
- a fuel injection valve is known that works on the principle of blind hole.
- a needle tip is formed on the valve needle, which also in the open position of the valve needle, so if this from the Body seat has lifted, protrudes into the blind hole.
- the needle tip has a conical sealing surface with which the valve needle is seated on the body seat. This sealing surface is adjoined by a convex, ie outwardly arched region, which in turn merges into a concave region, that is to say inwardly curved region.
- the end of the valve needle then forms a dome, which is also curved outward and connects tangentially in the concave area.
- the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the inlet of the fuel into the blind hole and thus the effective injection pressure at the Einspritzitzöflhungen be optimized.
- Transition of the conical body seat to the blind hole formed an edge that, in combination with the configuration of the needle tip ensures that the inlet of the fuel is further optimized in the blind hole.
- the blind hole has a conical wall from which the injection openings emanate.
- the needle tip extends so far into the blind hole that the concave needle tip, even when the valve needle is in its ⁇ rrhungs Bengal, reaches up to the level of Einspritzörrhungen. As a result, the introduction can be further optimized if this by appropriate
- the concave needle tip is adjoined by a curved dome which forms the end of the valve needle. Depending on how far the valve needle protrudes into the blind hole, this can reduce turbulence in the blind hole.
- the drawing shows an exemplary embodiment of the fuel injection valve according to the invention is shown.
- 1 shows a fuel injection valve in longitudinal section with its essential
- Figure 2 is an enlarged view of the designated II section of Figure 1 in the region of the body seat.
- a fuel injection valve according to the invention is shown in longitudinal section, with only the essential components are shown.
- the fuel injection valve has a valve body 1, in which a bore 3 is formed with a longitudinal axis 8, wherein the bore 3 at its combustion chamber side
- a body seat 9 End of a body seat 9 is limited.
- the body seat 9 is adjoined by a blind hole 10, from which at least one injection opening 7 originates, wherein a plurality of injection openings 7 are usually provided which are distributed over the circumference of the blind hole 10. It can also be provided that the individual Einspritzöfthungen 7 different inclination angle with respect to the - A -
- a piston-shaped valve needle 5 is arranged, which is longitudinally displaceable and which is sealingly guided in a guide portion 15 in the bore 3. Starting from the guide section 15, the valve needle 5 tapers the body seat 9 to form a pressure shoulder 13 and finally goes over into a valve sealing surface 11 at its body-side end.
- valve needle 5 End of the valve needle 5 finally forms a needle tip 30, which then, when the valve needle 5 rests on the body seat 9, projects into the blind hole 10.
- a pressure chamber 19 is formed which is radially expanded at the level of the pressure shoulder 13.
- a feed channel extending in the valve body 1 opens into the radial widening of the pressure chamber 19
- the valve needle 5 is acted upon at its end facing away from the body seat by a closing force which points in the direction of the body seat 9 and which is generated, for example, by a spring element or by hydraulic means. Depending on the ratio of this closing force to the hydraulic opening force, which arises essentially by the pressurization of the pressure shoulder 13, the valve needle 5 moves longitudinally within the bore 3. If the valve needle 5 on the body seat 9, the blind hole 10 is opposite the pressure chamber 19 closed. If, however, an injection of fuel take place, the valve needle 5 is moved away either by an increase in pressure in the pressure chamber 19 or by a reduction in the closing force of the body seat 9. As a result, fuel flows between the valve sealing surface 11 and the body seat 9 into the blind hole 10, from where the fuel is ejected via the injection openings 7.
- FIG. 2 shows an enlarged view of the detail of FIG. 1 in the region of the body seat 9.
- the valve sealing surface 11 is conically shaped, it also being possible to provide two or more conical surfaces with slightly different angles instead of one conical surface , Wherein all opening angles of these conical surfaces, as well as the opening angle of the valve sealing surface 11, are substantially equal to the opening angle of the likewise conical body seat 9.
- the conical valve sealing surface 11 is followed by a needle tip 30, which also in the open position of the valve needle 5, which in 2 is shown in the blind hole 10 protrudes.
- the needle tip 30 is concave directly following the valve sealing surface 11, ie curved inwards, so that an edge 34 is formed between the valve sealing surface 11 and the needle tip 30.
- To the needle tip 30 can either, as shown in Figure 2, connect a flat end face 32, or a dome 36, which is indicated in Figure 2 with a dashed line. This depends on how far the needle tip 30 protrudes into the blind hole 10, so that a certain calming of the flow in the blind hole 10 can be achieved by the tip 36.
- Figure 2 indicated by small arrows.
- the fuel flow then hits within the blind hole 10 again on the needle tip 30 and is effectively deflected by this in the direction of the injection openings 7.
- the energy loss is minimized during the deflection, resulting in a higher effective injection pressure, which is ultimately available within the injection port 7.
- the flow within the blind hole 10 is calmed, causing a further increase in the effective injection pressure.
- the effect described by the needle tip 30 can be further optimized by the fact that between the body seat 9 and the blind hole 10 an inlet edge
- the inlet edge 38 is formed, to which to a certain extent also a replacement of the fuel flow from the wall of the valve body 1 is done.
- the inlet edge 38 is particularly formed when the wall of the blind hole 10 is conical, as shown in Figure 2.
- the separation of the flow does not mean that the other areas in the blind hole 10 and the valve sealing surface 11 form dead water areas in which no flow takes place. Rather, the above description of the flow separation means that the main flow with the highest flow rates the described course, which is determined by this highest flow rate of the injection pressure substantially.
- the needle tip 30 can also be provided to form the needle tip 30 so long that it extends to the height of the injection openings 7. Depending on the dimensions of the blind hole 10 and the injection pressure used, this can contribute to a better steering of the fuel into the Einspritzöffhungen 7.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005025135A DE102005025135A1 (en) | 2005-06-01 | 2005-06-01 | Fuel injection valve for internal combustion engines |
PCT/EP2006/061400 WO2006128756A1 (en) | 2005-06-01 | 2006-04-06 | Fuel injection valve for internal combustion engines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1891324A1 true EP1891324A1 (en) | 2008-02-27 |
EP1891324B1 EP1891324B1 (en) | 2017-06-14 |
Family
ID=36676076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06743259.1A Active EP1891324B1 (en) | 2005-06-01 | 2006-04-06 | Fuel injection valve for internal combustion engines |
Country Status (5)
Country | Link |
---|---|
US (1) | US8720802B2 (en) |
EP (1) | EP1891324B1 (en) |
CN (1) | CN101184916B (en) |
DE (1) | DE102005025135A1 (en) |
WO (1) | WO2006128756A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021122166A1 (en) * | 2019-12-18 | 2021-06-24 | Robert Bosch Gmbh | Injection nozzle for injecting fuel under high pressure |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006062008A1 (en) * | 2006-12-29 | 2008-07-03 | Robert Bosch Gmbh | High pressure applying device for air-compressing auto-ignition internal combustion engine, has high pressure channel comprising blind hole, where section hole in region of hole base opens out into blind hole over sectional surface |
TW201040447A (en) * | 2009-03-13 | 2010-11-16 | Koninkl Philips Electronics Nv | Pattern-projecting light-output system |
DE102009018767A1 (en) * | 2009-04-24 | 2010-10-28 | Man Diesel & Turbo Se | Fuel injection valve for internal combustion engine, has nozzle body with hollow chamber which is divided into valve seat hole and stud hole is adjacent to valve seat hole |
EP2369166B1 (en) * | 2010-03-22 | 2017-12-13 | Delphi International Operations Luxembourg S.à r.l. | Injection nozzle |
DE102010063355A1 (en) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
JP6354519B2 (en) * | 2014-10-23 | 2018-07-11 | 株式会社デンソー | Fuel injection valve |
DE102018207646A1 (en) | 2018-05-16 | 2019-11-21 | Robert Bosch Gmbh | Fuel injection valve for an internal combustion engine |
JP7290904B2 (en) * | 2019-09-27 | 2023-06-14 | 株式会社ダイヘン | arc welding method |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1565210A (en) * | 1975-10-21 | 1980-04-16 | Lucas Industries Ltd | Fuel injection nozzles for direct injection internal combustion engine |
DE2726074A1 (en) * | 1977-06-10 | 1978-12-21 | Maschf Augsburg Nuernberg Ag | FUEL INJECTOR |
ATE39546T1 (en) * | 1985-10-22 | 1989-01-15 | Voest Alpine Automotive | METHOD OF MAKING AN INJECTOR BODY. |
DE3605082A1 (en) * | 1986-02-18 | 1987-08-20 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
DE3843235A1 (en) * | 1988-12-22 | 1990-06-28 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
JP3053934B2 (en) * | 1991-10-31 | 2000-06-19 | 愛三工業株式会社 | Multi-hole injector |
DE19547423B4 (en) * | 1995-12-19 | 2008-09-18 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE19726727A1 (en) * | 1997-06-24 | 1999-01-07 | Bosch Gmbh Robert | Fuel injector or fuel injector |
DE19820513A1 (en) * | 1998-05-08 | 1999-11-11 | Mtu Friedrichshafen Gmbh | Fuel injection nozzle for internal combustion engine |
DE19942370A1 (en) * | 1999-09-04 | 2001-03-22 | Bosch Gmbh Robert | Injection nozzle for internal combustion engines with an annular groove in the nozzle needle |
DE10000574A1 (en) * | 2000-01-10 | 2001-07-19 | Bosch Gmbh Robert | Fuel injector |
DE10031264A1 (en) * | 2000-06-27 | 2002-01-17 | Bosch Gmbh Robert | Fuel injection valve for IC engines with even fuel supply to all injection openings even if valve member is misaligned |
DE10122503A1 (en) * | 2001-05-10 | 2002-11-21 | Bosch Gmbh Robert | Valve with radial recesses |
DE10148350A1 (en) * | 2001-09-29 | 2003-04-24 | Bosch Gmbh Robert | Fuel injector, for a common rail direct fuel injection at an IC motor, has a fuel flow channel through the valve unit, opening into a flow zone directly upstream of the valve seat |
WO2003098031A1 (en) * | 2002-05-18 | 2003-11-27 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE10245573A1 (en) * | 2002-09-27 | 2004-04-08 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE10246693A1 (en) * | 2002-10-07 | 2004-04-15 | Siemens Ag | Injector for injecting fuel |
EP1563181B1 (en) * | 2002-11-11 | 2006-10-04 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE10253721A1 (en) * | 2002-11-19 | 2004-06-03 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE10260975A1 (en) * | 2002-12-24 | 2004-07-08 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE102004024534A1 (en) * | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Fuel injector |
JP2006009622A (en) * | 2004-06-23 | 2006-01-12 | Toyota Motor Corp | Fuel injection valve for internal combustion engine |
DE102004050046A1 (en) * | 2004-10-14 | 2006-04-20 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE602005003824T2 (en) * | 2005-08-24 | 2008-12-04 | Delphi Technologies, Inc., Troy | injection |
US7360722B2 (en) * | 2005-08-25 | 2008-04-22 | Caterpillar Inc. | Fuel injector with grooved check member |
US7685990B2 (en) * | 2007-11-29 | 2010-03-30 | Delphi Technologies, Inc. | Dual mode combustion apparatus and method |
EP2369166B1 (en) * | 2010-03-22 | 2017-12-13 | Delphi International Operations Luxembourg S.à r.l. | Injection nozzle |
-
2005
- 2005-06-01 DE DE102005025135A patent/DE102005025135A1/en not_active Ceased
-
2006
- 2006-04-06 US US11/908,673 patent/US8720802B2/en active Active
- 2006-04-06 CN CN2006800191638A patent/CN101184916B/en active Active
- 2006-04-06 WO PCT/EP2006/061400 patent/WO2006128756A1/en active Application Filing
- 2006-04-06 EP EP06743259.1A patent/EP1891324B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006128756A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021122166A1 (en) * | 2019-12-18 | 2021-06-24 | Robert Bosch Gmbh | Injection nozzle for injecting fuel under high pressure |
Also Published As
Publication number | Publication date |
---|---|
CN101184916A (en) | 2008-05-21 |
DE102005025135A1 (en) | 2006-12-07 |
WO2006128756A1 (en) | 2006-12-07 |
CN101184916B (en) | 2011-03-09 |
US20080142621A1 (en) | 2008-06-19 |
US8720802B2 (en) | 2014-05-13 |
EP1891324B1 (en) | 2017-06-14 |
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