EP1144849A1 - Brennstoffeinspritzventil - Google Patents
BrennstoffeinspritzventilInfo
- Publication number
- EP1144849A1 EP1144849A1 EP00988610A EP00988610A EP1144849A1 EP 1144849 A1 EP1144849 A1 EP 1144849A1 EP 00988610 A EP00988610 A EP 00988610A EP 00988610 A EP00988610 A EP 00988610A EP 1144849 A1 EP1144849 A1 EP 1144849A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- actuator
- injection valve
- flexible
- valve
- 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 abstract description 40
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 125000006850 spacer group Chemical group 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036540 impulse transmission Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
- F02M51/0607—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means the actuator being hollow, e.g. with needle passing through the hollow space
Definitions
- the invention relates to a fuel injection valve according to the preamble of the main claim.
- a fuel injection valve according to the preamble of claim 1 is known from DE 195 00 706 AI.
- the device described in DE 195 00 706 A1 for dosing liquids and gases, in particular m fuel injection valves for internal combustion engines, has a hydraulic path booster for converting the travel range of a piezoelectric actuator with an enlarged valve needle.
- the lifting piston of the displacement amplifier is provided with an end section with a reduced diameter, which projects into a recess in the working piston of the displacement amplifier.
- a disc spring lying in the amplifier chamber delimited by the pistons places the working piston against the actuator and a helical compression spring arranged in the recess concentrically to the end section presses the reciprocating piston against the valve needle.
- Influences of temperature changes, wear and manufacturing tolerances on the actuator travel are compensated for by the fact that on the guide surfaces of the pistons between a hollow cylindrical throttle gap is provided between the pistons and between the pistons and the inner wall of the valve housing, via which the amplifier chamber communicates with a liquid-filled low-pressure chamber.
- the volume specified by the amplifier chamber, the throttle gaps and the low pressure chamber is complete.
- a disadvantage of the lifting device known from DE 195 00 706 AI is, above all, the complex construction and the length of the valve.
- the relatively large volume and the relatively large cross-sectional area of the actuator also do not permit a particularly compact design.
- due to the large displacement volumes there is a high tendency to cavitation in the throttle gaps.
- the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the lifting device is flexible and, in addition to stroke translation and stroke reversal, problem-free temperature compensation is achieved.
- the seals designed as corrugated pipes are flexible so that length changes are compensated for.
- the flexibility of the seals improves the dynamic behavior of the fuel injection valve, since the flexible corrugated pipes largely prevent the valve closing body from bouncing on the valve seat surface and thus largely preventing the fuel injection valve from opening again. This achieves greater accuracy in the metering times and quantities.
- the tubular actuator Due to the partial placement of the valve needle in the central recess of the actuator, the tubular actuator permits a particularly compact and lightweight design of the fuel injection valve, a tubular valve needle which is sealed off from a nozzle body simultaneously serving to supply fuel to the sealing seat.
- FIG. 1 shows an axial section through an exemplary embodiment of a fuel injection valve according to the invention.
- FIG. 1 shows an axial sectional view of an exemplary embodiment of a fuel injector valve 1 according to the invention. It is a fuel injector valve 1 opening inwards internal combustion engine.
- the fuel injection valve 1 contains an actuator 2, which is constructed from disk-shaped piezoelectric or magnetostrictive elements 3 and is tubular.
- the actuator 2 thus has a central recess 4, in which a valve needle 5 is guided.
- the valve needle 5 is tubular and has a central recess 6 through which the fuel flows.
- the fuel is supplied via a connecting sleeve 8 m, a socket-shaped extension 9 of the valve needle 5.
- the actuator 2 bears with a first end face 10 against an actuator cover plate 11.
- the actuator cover plate 11 and the valve tilnadel 5 are connected by a first fuel seal 12, which is designed in the exemplary embodiment as a corrugated tube.
- the first fuel seal 12 seals an actuator housing 13 against the fuel, which is fed centrally via the connecting sleeve 8.
- the actuator housing 13 is sealed by a second fuel seal 14, which is also designed as a corrugated tube in the exemplary embodiment.
- the second fuel seal 14 is welded to the actuator housing 13 and the valve needle 5.
- a conversion device 15 is encapsulated in the actuator housing 13.
- the conversion device 15 comprises an actuator base plate 16 which bears against a second end face 17 of the actuator 2.
- a tubular intermediate piece 18 is connected to the actuator base plate 16 via a weld seam 26b and is supported with a radial projection 19 at a first end 20 of a biasing spring 21.
- the biasing spring 21 is supported with a second end 22 on a support plate 23 which rests on the inside of a shoulder of the actuator housing 13.
- the intermediate piece 18 and the support plate 23 are connected to one another by a first flexible seal 24.
- the actuator base plate 16 and the intermediate piece 18 engage behind a driver 25 with an L-shaped cross section, which is positively connected to the valve needle 5 via a weld seam 26a.
- the driver 25 is connected on the one hand by a second flexible seal 27 to the support plate 23 and on the other hand by a third flexible seal 28 to the radial projection 19 of the intermediate piece 18, preferably by welding.
- the three flexible seals 24, 27 and 28 are designed as corrugated pipes and enclose a pressure chamber 29 of the conversion device 15, which is filled with a hydraulic medium.
- the biasing spring 21 is encapsulated in the pressure chamber 29.
- valve needle 5 In the spray direction, the valve needle 5 is connected to a valve closing body 30, which forms a sealing seat with a valve seat surface 31.
- the fuel gets across running channels 32 m of the valve needle 5 m, an intermediate space 34 located between the valve closing body 30 and a nozzle body 33 and further to the sealing seat, where it is sprayed off via at least one spout opening 36 formed in a valve seat body 35.
- the piezoelectric elements 3 of the actuator 2 expand. Since the actuator 2 bears firmly against the actuator housing 13 via the actuator cover plate 11, the actuator 2 can only expand in the spray direction and thereby presses the actuator base plate 16 with the non-positively attached intermediate piece 18 in the spray direction.
- the intermediate piece 18 presses the biasing spring 21 further against the already existing bias.
- the movement of the intermediate piece 18 displaces the hydraulic medium enclosed in the pressure chamber 29 of the conversion device 15, as a result of which the driver is moved 25 m opening direction.
- the driver 25 is in operative connection with the valve needle 5, which is why it is also moved in the opening direction.
- the valve closing body 30 lifts off the valve seat surface 31 and fuel is sprayed through the bracing opening 36 formed in the valve seat body 35.
- the directional reversal of the actuator stroke by the conversion device 15 is possible because of the high actuation speed of the actuator 2.
- the hydraulic medium behaves in a compressible manner. Displacement of the hydraulic medium results in impulse transmission.
- the invention is not limited to the exemplary embodiment shown, but can also be implemented with a large number of other types of fuel injection valves 1, in particular with fuel injection valves 1 opening outwards.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19954537A DE19954537A1 (de) | 1999-11-12 | 1999-11-12 | Brennstoffeinspritzventil |
DE19954537 | 1999-11-12 | ||
PCT/DE2000/004017 WO2001036808A1 (de) | 1999-11-12 | 2000-11-11 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1144849A1 true EP1144849A1 (de) | 2001-10-17 |
EP1144849B1 EP1144849B1 (de) | 2005-10-19 |
Family
ID=7928857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00988610A Expired - Lifetime EP1144849B1 (de) | 1999-11-12 | 2000-11-11 | Brennstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6712289B1 (de) |
EP (1) | EP1144849B1 (de) |
JP (1) | JP2003515032A (de) |
CN (1) | CN1196855C (de) |
CZ (1) | CZ295500B6 (de) |
DE (2) | DE19954537A1 (de) |
WO (1) | WO2001036808A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10148594A1 (de) | 2001-10-02 | 2003-04-10 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10159749A1 (de) | 2001-12-05 | 2003-06-12 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10328573A1 (de) * | 2003-06-25 | 2005-01-13 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102005042786B4 (de) * | 2005-09-08 | 2009-04-16 | Siemens Ag | Kraftstoffinjektor mit hermetisch abgedichtetem Hydrauliksystem |
FR2947200B1 (fr) * | 2009-06-25 | 2011-08-19 | Prospection & Inventions | Outil de pose d'elements de fixation a injecteur de combustible |
DE102012219974A1 (de) * | 2012-10-31 | 2014-04-30 | Robert Bosch Gmbh | Aktor |
DE112014007115B4 (de) | 2014-10-28 | 2022-12-08 | Mitsubishi Electric Corporation | Kraftstoffeinspritzventil |
CN106939863B (zh) * | 2017-04-28 | 2022-05-17 | 南岳电控(衡阳)工业技术股份有限公司 | 一种配备有计量伺服阀的燃油喷油器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4803393A (en) * | 1986-07-31 | 1989-02-07 | Toyota Jidosha Kabushiki Kaisha | Piezoelectric actuator |
US5205492A (en) * | 1991-12-16 | 1993-04-27 | Gregory Khinchuk | Fuel injection valve |
JPH0861181A (ja) * | 1994-08-25 | 1996-03-05 | Mitsubishi Electric Corp | 燃料噴射装置 |
DE19500706C2 (de) | 1995-01-12 | 2003-09-25 | Bosch Gmbh Robert | Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen |
JP3817826B2 (ja) * | 1997-04-18 | 2006-09-06 | 日産自動車株式会社 | エンジンの燃料噴射弁 |
DE19856202A1 (de) * | 1998-12-05 | 2000-06-15 | Bosch Gmbh Robert | Piezoelektrischer Aktor |
DE10023322A1 (de) * | 2000-05-12 | 2001-11-15 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brenkraftmaschinen |
-
1999
- 1999-11-12 DE DE19954537A patent/DE19954537A1/de not_active Withdrawn
-
2000
- 2000-11-11 EP EP00988610A patent/EP1144849B1/de not_active Expired - Lifetime
- 2000-11-11 DE DE50011377T patent/DE50011377D1/de not_active Expired - Fee Related
- 2000-11-11 JP JP2001538666A patent/JP2003515032A/ja active Pending
- 2000-11-11 US US09/889,226 patent/US6712289B1/en not_active Expired - Fee Related
- 2000-11-11 CN CN00802295.XA patent/CN1196855C/zh not_active Expired - Fee Related
- 2000-11-11 CZ CZ20012499A patent/CZ295500B6/cs not_active IP Right Cessation
- 2000-11-11 WO PCT/DE2000/004017 patent/WO2001036808A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO0136808A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19954537A1 (de) | 2001-05-17 |
CN1196855C (zh) | 2005-04-13 |
WO2001036808A1 (de) | 2001-05-25 |
CZ295500B6 (cs) | 2005-08-17 |
JP2003515032A (ja) | 2003-04-22 |
EP1144849B1 (de) | 2005-10-19 |
DE50011377D1 (de) | 2006-03-02 |
US6712289B1 (en) | 2004-03-30 |
CZ20012499A3 (cs) | 2002-11-13 |
CN1327509A (zh) | 2001-12-19 |
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