WO2004081372A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2004081372A1 WO2004081372A1 PCT/DE2004/000112 DE2004000112W WO2004081372A1 WO 2004081372 A1 WO2004081372 A1 WO 2004081372A1 DE 2004000112 W DE2004000112 W DE 2004000112W WO 2004081372 A1 WO2004081372 A1 WO 2004081372A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection valve
- fuel injection
- piston
- fuel
- valve according
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000013016 damping Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004904 shortening 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
- F02M61/04—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
- 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
-
- 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
Definitions
- the invention applies to a fuel injector according to the preamble of claim 1.
- a fuel injector with a piezoelectric actuator which is operatively connected to a valve needle and is supported by a hydraulic coupler.
- the hydraulic coupler comprises a damping piston which engages in a blind hole in an upper valve part.
- a gap formed between the damping piston and the blind bore is filled with a hydraulic fluid.
- An annular membrane encloses a free end of the dispute and forms a compensation space filled with hydraulic fluid.
- the piezo actuator for changes in length due to mechanical, thermal and electrical loads.
- the change in length of the piezo actuator which is effected by electrical control, is used specifically to generate the valve lift.
- the hydraulic coupler loses hydraulic fluid through the leakage gap between the blind bore and the damping piston during the injection phase. This leads to a loss of stroke on the valve needle.
- the piezo actuator is activated for a maximum of 2ms.
- the coupler gap is designed so that the Leakage losses are minimized on the one hand and on the other hand the damping piston is repositioned during the filling phase.
- the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that the hydraulic coupler returns to its starting position after a short injection break, the coupler gap filling up again with hydraulic fluid.
- the formation of an equalization chamber at least partially filled with hydraulic fluid within the Collins ensures effective load equalization and reliable filling of the coupler gap.
- Leakage losses during the injection phase can be reduced by providing a throttle opening between the compensation chamber and the coupler gap.
- the use of an elastic membrane to limit the compensation space has the advantage that thermal and mechanical loads in the form of pressure or pressure acting on the hydraulic fluid. Volume signed by the membrane to be balanced.
- the membrane can advantageously be formed by a corrugated tube.
- the hydraulic fluid in the compensation chamber is acted upon by a compensation piston. In this way, the hydraulic fluid of the compensation chamber can be kept largely under constant pressure.
- the pressure piston is designed as a differential piston to which a fuel pressure is applied. In this way, fluctuations in the system pressure can be compensated for.
- Figure 1 is a schematic sectional view of a first embodiment of an inventive fuel injection valve
- FIG. 2 shows a schematic sectional illustration of a second exemplary embodiment of a combustion off-injection valve according to the invention
- FIG. 3 shows a schematic sectional illustration of a third exemplary embodiment of a fuel injection valve according to the invention
- 4 shows an advantageous further development of the fuel injection valve according to the invention according to FIG. 3.
- a fuel injection valve 1 according to the invention shown in a longitudinal section in FIG. 1 is used in particular for the direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignition internal combustion engine.
- a piezoelectric actuator 3, a hydraulic coupler 4 and a valve unit 5 are arranged coaxially to one another in a housing 2.
- the valve unit 5 has a valve needle 6 which carries a valve closing body 7 at its spray-side end.
- the valve closing body 7 forms a sealing seat 13 of the valve unit 5 with a valve seat surface 12.
- the valve needle 6 has a collar 8, on which a valve spring 9 is supported.
- the valve spring 9, on the other hand, rests on an inwardly projecting collar 10 of the housing 2 and urges the valve needle 6 axially in the direction of a closed position of the sealing seat 13.
- the piezoelectric actuator 3 is encapsulated in a sleeve 15 and axially biased by a biasing spring 16.
- a pin-shaped actuating element 17 is interposed between the actuator 3 and the valve needle 6 and transmits an axial displacement of the actuator 3 to the valve needle 6 to open the sealing seat 13.
- a membrane 18 Arranged between an actuator-side end of the valve needle 6 and the sleeve 15 is a membrane 18 designed as a corrugated tube, which seals an actuator space 19 located inside the sleeve 15 against a valve interior 20 located between the sleeve 15 and the housing 2.
- the valve interior 20 is filled with fuel.
- the actuator space 19 is delimited by an actuator head 22, on which the actuator 3 is axially supported on the end face.
- the actuator head 22 is axially displaceable relative to the housing 2.
- the actuator head On a side of the actuator head 22 facing the hydraulic coupler 4, the actuator head carries a tubular extension 23 which forms a receiving opening 24 for a piston 25.
- the piston 25 is designed as a cylindrical projection on a coupler head 26 and partially engages in the receiving opening 24.
- a coupler gap 27 is formed between the actuator head 22 and the piston 25, both axially and radially, which is filled with a hydraulic fluid.
- the coupler gap 27 opens outside of the receiving opening 24 into an equalizing space 28 which is delimited by a sealing membrane 29.
- the sealing membrane 29 is fastened on the one hand to an outer wall of the extension 23 and on the other hand to the coupler head 26, preferably soldered or welded.
- the sealing membrane 29 is preferably sleeve-shaped as a corrugated tube.
- the coupler head 26 is flanged on the end face of a cover 30 delimiting the valve interior 20 and welded to it.
- the cover 30 is axially penetrated by an electrical line 34 for actuating the actuator 3.
- the blind hole 35, the transverse bore 36 and the fuel line 37 serve to supply the fuel injector 1 with fuel.
- a coupler spring 38 is arranged between the actuator head 22 and the coupler head 26, which acts on the actuator head 22 against the valve spring 9, so that when the actuator 3 is in the rest position, a defined coupler gap 27 is formed between the piston 25 and the actuator head 22 on a bottom of the receiving opening 24 forms.
- the cavity 40 is correspondingly filled with the hydraulic fluid and forms a compensation chamber 42.
- fuel injector 1 in its rest position, fuel injector 1 assumes the position shown in FIG. 1.
- the actuator 3 When the actuator 3 is activated, it experiences one Elongation, which is transmitted to the valve needle 6 via the actuating element 17, so that the valve closing body 7 lifts off the valve seat surface 12 and the fuel injection valve 1 opens. Since the extension and subsequent shortening of the actuator 3 take place very quickly, the coupler gap 27 remains largely filled with hydraulic fluid, so that the actuator head 22 can be axially supported on the coupler head 26 via the hydraulic fluid. Changes in length of the actuator 3 as a result of thermal or mechanical loads are compensated for by the hydraulic fluid in which it can flow to the compensation chamber 24 or the compensation chamber 42 or flow in from there.
- FIG. 2 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention.
- a compensating piston 43 is provided in the cavity 40, which seals the compensating chamber 42 against a spring chamber 45 via a sealing ring 44 on its outer circumference.
- the spring chamber 45 there is an axial compression spring 46 which exerts a pressure on the hydraulic fluid in the compensating chamber 42 via the piston 25.
- the volume of the compensation chamber 42 can be changed with the aid of the compensation piston 43.
- FIG. 3 shows a third exemplary embodiment of a fuel injection valve 1 according to the invention.
- the cavity 40 is open toward the blind hole 35 leading to the fuel.
- a space 50 borders on the cavity 40.
- the space 50 is in turn connected to the blind hole 35 via a throttle line 51, so that there is fuel pressure in the space 50.
- the compensating piston 43 has a cylindrical nose 52 on the fuel side, on which the fuel pressure prevailing in the intermediate space 50 acts.
- the compensating piston 43 is thus designed as a differential piston 53 in this embodiment.
- a compression spring 46 has been omitted. Likewise, there is no coupler spring 38 in this embodiment.
- FIG. 4 shows a variant of the exemplary embodiment according to FIG.
- the invention is not limited to the illustrated embodiments and, for example, for other types of fuel injector 1 such.
- B. internal fuel injectors or fuel injectors with electrostrictive or magnetostrictive actuators are suitable.
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 |
---|---|---|---|
DE502004004646T DE502004004646D1 (de) | 2003-03-11 | 2004-01-26 | Brennstoffeinspritzventil |
EP04705047A EP1604105B1 (de) | 2003-03-11 | 2004-01-26 | Brennstoffeinspritzventil |
US10/540,225 US20060043213A1 (en) | 2003-03-11 | 2004-01-26 | Fuel injection valve |
JP2005518244A JP2006510848A (ja) | 2003-03-11 | 2004-01-26 | 燃料噴射弁 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10310499.2 | 2003-03-11 | ||
DE10310499A DE10310499A1 (de) | 2003-03-11 | 2003-03-11 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004081372A1 true WO2004081372A1 (de) | 2004-09-23 |
Family
ID=32892020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/000112 WO2004081372A1 (de) | 2003-03-11 | 2004-01-26 | Brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060043213A1 (de) |
EP (1) | EP1604105B1 (de) |
JP (1) | JP2006510848A (de) |
AT (1) | ATE370324T1 (de) |
DE (2) | DE10310499A1 (de) |
WO (1) | WO2004081372A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357189A1 (de) * | 2003-12-08 | 2005-07-07 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
CN100513233C (zh) | 2004-07-07 | 2009-07-15 | 西门子公司 | 电子停车制动器和用于控制电子停车制动器的方法 |
DE602006021529D1 (de) | 2006-02-03 | 2011-06-09 | Continental Automotive Gmbh | Aktoreinheit für ein Einspritzventil und Einspritzventil |
EP2078846B1 (de) | 2008-01-14 | 2014-12-03 | Continental Automotive GmbH | Aktuatoranordnung und Einspritzventil |
FI121719B (fi) | 2009-05-28 | 2011-03-15 | Waertsilae Finland Oy | Polttoaineen ruiskutusventtiili |
DE102012202909A1 (de) * | 2012-02-27 | 2013-08-29 | Robert Bosch Gmbh | Ventil zum Zumessen von Fluid |
DE102012204216A1 (de) * | 2012-03-16 | 2013-09-19 | Robert Bosch Gmbh | Baugruppe |
US8646432B1 (en) * | 2012-10-11 | 2014-02-11 | Mcalister Technologies, Llc | Fluid insulated injector-igniter |
DE102013219225A1 (de) * | 2013-09-25 | 2015-03-26 | Continental Automotive Gmbh | Piezo-Injektor zur Kraftstoff-Direkteinspritzung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1111230A2 (de) * | 1999-12-22 | 2001-06-27 | Siemens Aktiengesellschaft | Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung |
US20030042325A1 (en) * | 2001-08-31 | 2003-03-06 | Siemens Automotive Corporation | Twin tube hydraulic compesator for a fuel injector |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2661243A (en) * | 1951-01-02 | 1953-12-01 | Phillips Petroleum Co | Viscosity compensating variablearea fuel nozzle |
DE60121352T2 (de) * | 2000-10-11 | 2007-08-02 | Siemens Vdo Automotive Corporation, Auburn Hills | Ausgleichvorrichtung mit einer flexiblen membran für ein kraftstoffeinspritzventil und verfahren dafür |
DE10133265A1 (de) * | 2001-07-09 | 2003-01-23 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US6749127B2 (en) * | 2002-02-11 | 2004-06-15 | Siemens Vdo Automotive Corporation | Method of filling fluid in a thermal compensator |
-
2003
- 2003-03-11 DE DE10310499A patent/DE10310499A1/de not_active Withdrawn
-
2004
- 2004-01-26 AT AT04705047T patent/ATE370324T1/de not_active IP Right Cessation
- 2004-01-26 EP EP04705047A patent/EP1604105B1/de not_active Expired - Lifetime
- 2004-01-26 US US10/540,225 patent/US20060043213A1/en not_active Abandoned
- 2004-01-26 WO PCT/DE2004/000112 patent/WO2004081372A1/de active IP Right Grant
- 2004-01-26 DE DE502004004646T patent/DE502004004646D1/de not_active Expired - Lifetime
- 2004-01-26 JP JP2005518244A patent/JP2006510848A/ja not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1111230A2 (de) * | 1999-12-22 | 2001-06-27 | Siemens Aktiengesellschaft | Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung |
US20030042325A1 (en) * | 2001-08-31 | 2003-03-06 | Siemens Automotive Corporation | Twin tube hydraulic compesator for a fuel injector |
Also Published As
Publication number | Publication date |
---|---|
EP1604105B1 (de) | 2007-08-15 |
JP2006510848A (ja) | 2006-03-30 |
DE502004004646D1 (de) | 2007-09-27 |
ATE370324T1 (de) | 2007-09-15 |
US20060043213A1 (en) | 2006-03-02 |
DE10310499A1 (de) | 2004-09-23 |
EP1604105A1 (de) | 2005-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2052148B1 (de) | Kraftstoffinjektor mit direkter nadelsteuerung und servoventil-unterstützung | |
WO2003085253A1 (de) | Einspritzventil | |
EP1604105B1 (de) | Brennstoffeinspritzventil | |
DE10133265A1 (de) | Brennstoffeinspritzventil | |
EP1378657B1 (de) | Brennstoffeinspritzventil | |
EP1436500B1 (de) | Brennstoffeinspritzventil | |
EP1457662B1 (de) | Brennstoffeinspritzventil | |
WO2009059864A1 (de) | Piezoelektrisches aktormodul | |
EP1519036B1 (de) | Brennstoffeinspritzventil | |
DE10213858A1 (de) | Brennstoffeinspritzventil | |
EP1538331B1 (de) | Brennstoffeinspritzventil | |
EP1431568A2 (de) | Brennstoffeinspritzventil | |
EP2232045B1 (de) | Brennstoffeinspritzventil | |
EP1519034B1 (de) | Brennstoffeinspritzventil | |
EP1406006B1 (de) | Brennstoffeinspritzventil | |
EP1450034B1 (de) | Brennstoffeinspritzventil | |
DE10137210A1 (de) | Brennstoffeinspritzventil | |
EP2317117B1 (de) | Aktormodul und Brennstoffeinspritzventil | |
WO2005050001A1 (de) | Brennstoffeinspritzventil | |
DE10043625A1 (de) | Hydraulisch übersetztes Ventil | |
EP1825137B1 (de) | Kraftstoffeinspritzdüse | |
EP1491760B1 (de) | Brennstoffeinspritzventil | |
DE10259730A1 (de) | Brennstoffeinspritzventil | |
EP1825134A1 (de) | Kraftstoffeinspritzdüse | |
DE10342034A1 (de) | Brennstoffeinspritzventil |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2004705047 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2005518244 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 2006043213 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10540225 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2004705047 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10540225 Country of ref document: US |
|
WWG | Wipo information: grant in national office |
Ref document number: 2004705047 Country of ref document: EP |