WO2003072929A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2003072929A1 WO2003072929A1 PCT/DE2002/004730 DE0204730W WO03072929A1 WO 2003072929 A1 WO2003072929 A1 WO 2003072929A1 DE 0204730 W DE0204730 W DE 0204730W WO 03072929 A1 WO03072929 A1 WO 03072929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- valve
- injection valve
- fuel
- closing body
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/042—The valves being provided with fuel passages
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
Definitions
- the invention relates to a fuel injection valve according to the preamble of the main claim.
- An ignitable fuel / air mixture can be formed in the cylinders of direct-injection internal combustion engines by injecting fuel into each combustion chamber delimited by a piston by means of an injector when a nozzle opening is released by lifting a valve member from a valve seat comprising the nozzle opening.
- the opening stroke of the valve member and the injection time are variably adjustable.
- the Fuel injection device includes a
- Fuel injection valve which is arranged in the cylinder wall at a distance from the cylinder head and opposite the outlet opening, and an outlet opening, wherein the jet axis of the fuel injection valve is directed towards the area around the spark plug arranged in the cylinder head.
- the fuel injection valve has a magnetically actuated valve needle with helical helical grooves for generating a Swirl flow of the injection jet onto the fuel injection valve is directed with its jet axis at the ignition point located in the center of the cylinder head
- a disadvantage of the methods and devices for injecting fuel into the combustion chamber of a mixture-compressing externally ignited internal combustion engine known from the above-mentioned publications are, in particular, the complicated combustion chamber geometries, which are necessary to mix the injected fuel with the supplied air, and to match an ignitable fuel / air mixture form and for ignition this has to be transported close to the spark gap of the spark plug.
- Such combustion chamber geometries are difficult to manufacture on the one hand, and on the other hand combustion cannot be optimized with regard to the emission of nitrogen oxides and the consumption of fuel
- Another disadvantage is that in most cases the spark plug is injected directly through the fuel injector. As a result, the spark plug is exposed to strong thermal shock loads on the one hand, and on the other hand soot deposits on the spark plug electrodes, which considerably limits the life of the spark plug.
- a particular disadvantage of the fuel injector known from DE 198 27 219 A1 is that the fuel injected by the different injection angles into the combustion engine largely hits the walls of the combustion chamber or the piston, cools there and thus only with high pollutant emissions or Soot development can be burned.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the mixture cloud injected into the combustion chamber of the internal combustion engine can be influenced by appropriate shaping of the valve closing body of the fuel injector by targeted throttling in front of the sealing seat so that the mixture cloud ignites the spark plug only at the end of the injection process reached.
- valve needle or the valve closing body here has surface grindings which throttle the fuel flow to a greater or lesser extent depending on the radial depth of the surface grindings, so that the mixture cloud leaving the fuel injector has a larger or smaller opening angle ⁇ depending on the stroke position of the valve needle.
- the number of surface grinding is arbitrary, so that the desired throttling effect can be freely selected.
- raised guide surfaces arranged between the flat grinds interact with a counter surface formed on the nozzle body in such a way that the guidance of the valve needle is ensured at all times. Malfunctions caused by offsets in the valve needle can be prevented.
- the throttling effect can be regulated either by recessed surface grinding or by a raised guide ring.
- Fig. 1 shows a longitudinal section through an embodiment of a fuel injection system with a
- Fuel injector is generated in the combustion chamber
- FIG. 2 is a partially sectioned view of an embodiment of a fuel injection valve according to the invention
- Fig. 3A-B shows a section through the spray-side part of the embodiment of a fuel injection valve according to the invention shown in Fig. 2 in two different stroke positions
- Fig. 4 shows a second embodiment of a fuel injector according to the invention in the same representation as in Figs. 3A and 3B.
- FIG. 1 shows an exemplary, schematic sectional illustration of an exemplary embodiment of a fuel injection system 1 for a mixture-compressing spark-ignition internal combustion engine.
- the fuel injection system 1 comprises a combustion chamber 2, which is delimited by cylinder walls 3, a cylinder head 4, which has ridge collars 5, and a piston 6.
- a spark plug 7 is e.g. B. laterally projecting into the combustion chamber 2.
- a fuel injection valve 10 according to the invention is arranged between the ridge slopes 5 so that fuel is injected into the combustion chamber 2 in the form of, for example, a cone-shaped mixture cloud 8, 9.
- the fuel injector 10 is designed according to the invention in such a way that the fuel flow therein is throttled to a varying degree so that it depends on the Stroke position of a valve needle of the fuel injector 10, a mixture cloud 8, 9 with a variable opening angle can be generated in the combustion chamber 2.
- valve needle or a valve-closure member that is operatively connected to it has at least one, preferably several surface grindings or a guide ring.
- a mixture cloud 8 can first be generated in the combustion chamber 2, which has a large penetration and a small opening angle, while during the closing process of the fuel injector 10, the mixture cloud 9 is briefly generated with a larger opening angle ⁇ , which the spark plug 7 in the area of Strips electrodes and thus transported ignitable mixture to the spark gap of the spark plug 7.
- FIG. 2 An embodiment of a fuel injection valve 10 designed according to the invention, which is suitable for this operating mode, is shown in FIG. 2 and described below.
- FIG. 2 shows a schematic sectional view of an exemplary embodiment of a fuel injection valve 10 designed according to the invention, which is particularly suitable for use in the fuel injection system 1 shown in FIG. 1.
- the fuel injection valve 10 is designed in the form of a direct injection fuel injection valve 10, which serves for the direct injection of fuel into the combustion chamber 2 of the mixture-compressing, spark-ignition internal combustion engine. In the exemplary embodiment, this is an outward opening fuel injector 10.
- the fuel injection valve 10 comprises an actuator 11, which in the present exemplary embodiment is designed as a piezoelectric actuator 11.
- the actuator 11 is encapsulated in an actuator housing 12 for stabilization and is supported at the end in the feed direction on an abutment 13 and on the downstream side on a shoulder 14.
- the shoulder 14 is non-positively connected to a two-part valve needle 15.
- An inflow-side first part 16 of the valve needle 15 is supported on the shoulder 14, while a second part 17 is arranged separately from the first part 16 on the outflow side.
- the first part 16 of the valve needle 15 is acted upon by a first return spring 18, which is arranged between the shoulder 14 and a sealing housing 19.
- the second part 17 of the valve needle 15 is acted upon by a second return spring 20, the spring force of which is less than that of the first return spring 18, so that the second part 17 of the valve needle 15 can swing through with respect to the first part 16.
- a second return spring 20 the spring force of which is less than that of the first return spring 18, so that the second part 17 of the valve needle 15 can swing through with respect to the first part 16.
- the fuel injection valve 10 further comprises a corrugated tube seal 21, which protects the actuator 11 from the fuel flowing through the fuel injection valve 10.
- the fuel is supplied via a central fuel supply 22 and flows through a fuel channel 23 in a housing body 24. It passes the sealing housing 19 and a recess 25 of a nozzle body 26 inserted into the housing body 24, which also includes the second part 17 of the nozzle body Valve needle 15 is arranged, passed.
- the second part 17 of the valve needle 15 has a valve closing body 27 which is formed in one piece with the valve needle 15 or has a non-positive connection therewith and which forms a sealing seat with a valve seat surface 28 formed on the nozzle body 26.
- FIGS. 3A to 3B and 4 show in more detail and explained in detail in the following description.
- an excitation voltage is applied to the actuator 11, for example via an electrical line (not shown).
- the first part 16 of the valve needle is moved 15 m in one stroke direction.
- the second part 17 of the valve needle 15 with the valve closing body 27 formed thereon is also moved 20 m against the force of the second return spring, so that the valve closing body 27 lifts off the valve seat surface 28 and fuel is sprayed off.
- the first part 16 of the valve needle 15 returns to its starting position against the stroke direction m by the force of the first return spring 18.
- the second part 17 of the valve needle 15 is also relieved, as a result of which the valve closing body 27 rests on the valve seat surface 28 and the fuel injection valve 10 is closed.
- FIGS. 3A and 3B show a partial enlargement of the section of FIG. 2, designated III, of the fuel injection valve 10 according to the invention with two different lift positions of the valve needle 15.
- FIG. 3A shows a lift position which corresponds, for example, to an open position of the fuel injection valve 10
- 3B shows a stroke position which occurs with a smaller stroke of the valve needle 15, for example when the fuel injection valve 10 is closed.
- Corresponding components are provided with the same reference numerals in all the figures.
- the second part 17 of the valve needle 15 has or directly on the valve closing body 27 formed integrally therewith second part 17 of the valve needle 15 at least one surface grinding 29.
- a plurality of surface grindings 29 are preferably formed on the valve closing body 27 in a regular or irregular manner over the circumference thereof.
- the surface grindings 29 are, for example, longitudinally oval and alternate with guide surfaces 30 which rest on a counter surface 31 formed on the nozzle body 26.
- the guide surfaces 30 and the counter surface 31 guide the second part 17 of the valve needle 15 during the lifting movement. Malfunctions of the fuel injection valve 10 can thereby be prevented by offsets of the valve needle 15 with subsequent jamming.
- the change in an opening angle ⁇ of the mixture cloud 8, 9 injected into the combustion chamber 2 is to be designed such that a mixture cloud 9 is generated at the end of the injection cycle, the opening angle 0: 2 of which is greater than the opening angle oti at the beginning of the injection cycle is.
- the surface grindings 29 on the valve closing body 27 are accordingly designed in their radial extent such that they define the width of a throttle gap 32 that is released between the surface grindings 29 and the counter surface 31.
- the width of the opening cross section at the sealing seat in the fully open state of the fuel injector 10 is in any case greater than the width of the throttle gap 32 defined by the surface grindings 29, so that the surface grindings 29 serve as a pre-throttle.
- a conical mixture cloud 8 with a small opening angle oti can be injected into the combustion chamber 2 by the pre-throttling achieved in the Drossse I gap 32.
- the flow lamella which is formed in the narrow gap on the surface grinding, is thinner than the gap on the sealing seat.
- the fuel lamella can flow outwards through the sealing seat with little deflection.
- the fuel lamella does not flow parallel to the walls through the sealing seat area, but is directed obliquely downwards.
- the cone-shaped mixture cloud has a small opening angle.
- valve closing body 27 If the valve closing body 27 is moved in a closing direction because the actuator 11 of the fuel injection valve 10 is supplied with a smaller excitation voltage, the distance of the valve closing body 27 from the valve seat surface 28 narrows. If the distance becomes smaller than the gap on the surface grinding, the flows Flow through the seat gap inevitably parallel to the walls. This creates a larger opening angle of the conical mixture cloud than in the first case.
- FIG. 4 shows a second exemplary embodiment of a fuel injection valve 10 designed according to the invention in the same representation as FIGS. 3A and 3B.
- the throttling function of the throttle gap 32 is independent of the surface grinding 29.
- the surface grinding 29 is on the outflow side.
- a guide area 33 is formed which defines a throttle gap 34 which is always the same width over the circumference of the valve closing body 27.
- the invention is not limited to the exemplary embodiments shown and 10 different arrangements of spark plugs 7 and fuel injection valves 10 in the cylinder head 4 of an internal combustion engine and magnetic drive of the valve needle movement can be used for any designs of fuel injection valves 10
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
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003571588A JP4593927B2 (ja) | 2002-02-26 | 2002-12-23 | 燃料噴射弁 |
DE50213972T DE50213972D1 (de) | 2002-02-26 | 2002-12-23 | Brennstoffeinspritzventil |
EP02795038A EP1481159B1 (de) | 2002-02-26 | 2002-12-23 | Brennstoffeinspritzventil |
KR1020047013237A KR100972523B1 (ko) | 2002-02-26 | 2002-12-23 | 연료 분사 밸브 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10208222.7 | 2002-02-26 | ||
DE10208222A DE10208222A1 (de) | 2002-02-26 | 2002-02-26 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003072929A1 true WO2003072929A1 (de) | 2003-09-04 |
Family
ID=27762450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/004730 WO2003072929A1 (de) | 2002-02-26 | 2002-12-23 | Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1481159B1 (de) |
JP (1) | JP4593927B2 (de) |
KR (1) | KR100972523B1 (de) |
DE (2) | DE10208222A1 (de) |
WO (1) | WO2003072929A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITNA20110032A1 (it) * | 2011-07-29 | 2011-10-28 | Antonio Potignano | Polverizzatore del combustibile a fori e sezione d'iniezione variabile |
ITNA20110035A1 (it) * | 2011-08-09 | 2011-11-08 | Antonio Potignano | Polverizzatore del combustibile a fori e sezione d'iniezione variabile |
EP2927473A1 (de) * | 2014-04-03 | 2015-10-07 | Continental Automotive GmbH | Kraftstoffeinspritzventil für einen Verbrennungsmotor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009138614A (ja) * | 2007-12-05 | 2009-06-25 | Mitsubishi Heavy Ind Ltd | 蓄圧式燃料噴射装置の燃料噴射弁 |
RU2651925C1 (ru) * | 2017-07-19 | 2018-04-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Ярославский государственный технический университет" ФГБОУВО "ЯГТУ" | Распылитель клапанной форсунки двигателя внутреннего сгорания и способ его сборки |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0451408A1 (de) * | 1990-04-12 | 1991-10-16 | Lucas Industries Public Limited Company | Kraftstoffeinspritzventil |
US5878961A (en) * | 1996-06-14 | 1999-03-09 | Robert Bosch Gmbh | Injection valve for injecting fuel directly into a combustion chamber of an internal combustion engine |
US6155499A (en) * | 1996-08-17 | 2000-12-05 | Robert Bosch Gmbh | Injection valve, particularly for direct injection of fuel into the combustion chamber of an internal combustion engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19601019A1 (de) * | 1996-01-13 | 1997-07-17 | Bosch Gmbh Robert | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
US20060155499A1 (en) * | 2005-01-11 | 2006-07-13 | Wei-Kuo Shih | Method for calibration of digital image-captured devices |
-
2002
- 2002-02-26 DE DE10208222A patent/DE10208222A1/de not_active Withdrawn
- 2002-12-23 KR KR1020047013237A patent/KR100972523B1/ko not_active IP Right Cessation
- 2002-12-23 EP EP02795038A patent/EP1481159B1/de not_active Expired - Lifetime
- 2002-12-23 JP JP2003571588A patent/JP4593927B2/ja not_active Expired - Fee Related
- 2002-12-23 WO PCT/DE2002/004730 patent/WO2003072929A1/de active Application Filing
- 2002-12-23 DE DE50213972T patent/DE50213972D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0451408A1 (de) * | 1990-04-12 | 1991-10-16 | Lucas Industries Public Limited Company | Kraftstoffeinspritzventil |
US5878961A (en) * | 1996-06-14 | 1999-03-09 | Robert Bosch Gmbh | Injection valve for injecting fuel directly into a combustion chamber of an internal combustion engine |
US6155499A (en) * | 1996-08-17 | 2000-12-05 | Robert Bosch Gmbh | Injection valve, particularly for direct injection of fuel into the combustion chamber of an internal combustion engine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITNA20110032A1 (it) * | 2011-07-29 | 2011-10-28 | Antonio Potignano | Polverizzatore del combustibile a fori e sezione d'iniezione variabile |
ITNA20110035A1 (it) * | 2011-08-09 | 2011-11-08 | Antonio Potignano | Polverizzatore del combustibile a fori e sezione d'iniezione variabile |
EP2927473A1 (de) * | 2014-04-03 | 2015-10-07 | Continental Automotive GmbH | Kraftstoffeinspritzventil für einen Verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
JP2005518498A (ja) | 2005-06-23 |
EP1481159B1 (de) | 2009-10-28 |
KR100972523B1 (ko) | 2010-07-28 |
DE10208222A1 (de) | 2003-10-30 |
JP4593927B2 (ja) | 2010-12-08 |
DE50213972D1 (de) | 2009-12-10 |
KR20040083459A (ko) | 2004-10-01 |
EP1481159A1 (de) | 2004-12-01 |
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