WO2001034967A1 - Kraftstoff-einspritzdüse - Google Patents
Kraftstoff-einspritzdüse Download PDFInfo
- Publication number
- WO2001034967A1 WO2001034967A1 PCT/DE2000/003694 DE0003694W WO0134967A1 WO 2001034967 A1 WO2001034967 A1 WO 2001034967A1 DE 0003694 W DE0003694 W DE 0003694W WO 0134967 A1 WO0134967 A1 WO 0134967A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- injection nozzle
- nozzle needle
- piezo actuator
- piezo
- 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.)
- Ceased
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
-
- 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 relates to a fuel injection nozzle with a nozzle body, a nozzle needle which is displaceable in the nozzle body, a piezo actuator which is connected to the nozzle needle, and a compensating piston on which the piezo actuator is supported and which projects into a compensating chamber , which is filled with a fluid, the compensation chamber being connected to a supply volume through an inlet with a small cross-section
- Such an injection nozzle is known from DE 35 33 085 A1.
- the compensating piston makes it possible to compensate for a change in length of the piezo actuator that occurs at a low speed. Such a change in length is caused in particular by a change in the temperature. If such a change occurs, this becomes Fluid displaced from the equalizing piston out of the equalizing chamber or sucked into it.
- a displacement of the fluid present in the equalizing chamber becomes such a high resistance due to the small cross section opposite to the inlet that the compensating piston acts as a rigid abutment.
- the nozzle needle can then be actuated without the compensating piston influencing the opening of the breath
- a separate return spring is provided for the nozzle needle.
- the piezo actuator To open the nozzle needle, it is necessary for the piezo actuator to overcome the force exerted by the return spring, which causes high actuation forces
- the object of the invention is then to create a fuel injection nozzle which does not require the return spring to be overcome by the piezo actuator
- a fuel injector of the type mentioned at the outset which has the features of the characterizing part of patent claim 1 has the advantage that the pressure prevailing in the supply volume, which also acts on the compensating piston, acts in a comparable way to a return spring for the nozzle needle, so that a separate, strongly pre-stressed one Return spring can be dispensed with
- the injection nozzle has a nozzle body 10 in which an inside-opening nozzle needle 12 is slidably arranged.
- the nozzle needle 12 can open spray holes 14 which are formed in the nozzle body 10 in order to enable the injection of fuel via a supply bore 16 and one Ring channel 18 is provided.
- the supply bore 16 is supplied by a high-pressure manifold, which is known under the name "Common Rail"
- the nozzle needle 12 is connected at its end facing away from the spray holes 14 to a piezo actuator 20 which consists of a stack of piezo elements 22 and a holder 24.
- the piezo elements are prestressed in the holder 24 by an annular spring 26.
- the piezo Actuator 20 is also provided with supply connections (not shown), by means of which a voltage can be applied to the piezo elements 22
- a ball 28 is arranged, on which a compensating piston 30 rests.
- the ball 28 ensures that any tolerances and positional deviations between the compensating piston 30 and the piezo actuator 20 in the radial direction are not from one part is transferred to the other
- the piston 30 protrudes into a compensation chamber 32, which is connected via an annular gap with the thickness d between the wall of the compensation chamber 32 and the compensation piston 30 to a supply volume 34.
- the supply volume is under the system pressure P S ⁇ s , which is usually equal to the pressure of the fuel provided
- a pressure spring 36 is arranged between the nozzle body 10 and a collar of the compensating piston 30 and acts on the compensating piston 30 against the piezo actuator 20.
- the compression spring 36 thus acts on the compensating piston 30 in the sense of an increase in the volume of the compensating chamber 32
- the fuel injector described works in the following manner.
- the compression spring 36 ensures that the nozzle needle 12 is pressed against the nozzle body 10 via the piezo actuator 20, so that the spray holes 14 are closed and none Fuel from the injection nozzle can enter the combustion chamber of an internal combustion engine to be supplied.
- the injection system is switched on and fuel 16 is ready via is set, which is under system pressure, an opening force is generated on the annular shoulder of the nozzle needle 12 arranged in the annular chamber 18. This acts upward on the nozzle needle 12 with respect to the figure.
- the opening force is counteracted by the piezo actuator 20 and the compensating piston 30 on the piezo elements 22, a voltage is applied in the compensating state, so that the individual piezo elements axially elongate.
- the rear end of the piezo actuator 20 is supported by the compensating piston 30 against the fluid which is in the compensating chamber 32 under system pressure
- the voltage applied to the piezo elements 22 is interrupted.
- the piezo elements then contract axially, so that the nozzle needle 12 can make an opening stroke of up to 0.25 mm.
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 |
|---|---|---|---|
| DE50014918T DE50014918D1 (de) | 1999-11-08 | 2000-10-20 | Kraftstoff-einspritzdüse |
| EP00979439A EP1144846B1 (de) | 1999-11-08 | 2000-10-20 | Kraftstoff-einspritzdüse |
| US09/869,907 US6758409B1 (en) | 1999-11-08 | 2000-10-20 | Fuel injection nozzle |
| JP2001536870A JP2003514189A (ja) | 1999-11-08 | 2000-10-20 | 燃料噴射ノズル |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19953562A DE19953562A1 (de) | 1999-11-08 | 1999-11-08 | Kraftstoff-Einspritzdüse |
| DE19953562.0 | 1999-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001034967A1 true WO2001034967A1 (de) | 2001-05-17 |
Family
ID=7928220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2000/003694 Ceased WO2001034967A1 (de) | 1999-11-08 | 2000-10-20 | Kraftstoff-einspritzdüse |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6758409B1 (de) |
| EP (1) | EP1144846B1 (de) |
| JP (1) | JP2003514189A (de) |
| KR (1) | KR100665935B1 (de) |
| CZ (1) | CZ295573B6 (de) |
| DE (2) | DE19953562A1 (de) |
| WO (1) | WO2001034967A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161945A1 (de) * | 2014-04-22 | 2015-10-29 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für brennkraftmaschinen und ein verfahren zum betreiben desselben |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10147669A1 (de) * | 2001-09-27 | 2003-04-10 | Bosch Gmbh Robert | Piezoaktor zur Betätigung eines mechanischen Bauteils |
| DE10158789A1 (de) * | 2001-11-30 | 2003-07-10 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| DE102004044153A1 (de) | 2004-09-13 | 2006-03-30 | Siemens Ag | Hubvorrichtung und Einspritzventil |
| DE102005009147A1 (de) * | 2005-03-01 | 2006-09-07 | Robert Bosch Gmbh | Kraftstoffinjektor für Verbrennungskraftmaschinen |
| US8113179B1 (en) | 2010-08-10 | 2012-02-14 | Great Plains Diesel Technologies, L.C. | Programmable diesel fuel injector |
| US8418676B2 (en) | 2010-08-10 | 2013-04-16 | Great Plains Diesel Technologies, L.C. | Programmable diesel fuel injector |
| US8683982B2 (en) | 2010-08-10 | 2014-04-01 | Great Plains Diesel Technologies, L.C. | Programmable diesel fuel injector |
| WO2014124154A1 (en) | 2013-02-06 | 2014-08-14 | Great Plains Diesel Technologies, L.C. | Magnetostrictive actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1910143A1 (de) * | 1969-02-28 | 1970-11-05 | Kloeckner Humboldt Deutz Ag | Elektrisch steuerbares Einspritzventil |
| DE3533085A1 (de) | 1985-09-17 | 1987-03-26 | Bosch Gmbh Robert | Zumessventil zur dosierung von fluessigkeiten oder gasen |
| US5280773A (en) * | 1989-11-03 | 1994-01-25 | Man Nutzfahrzeuge Ag | Method and apparatus for injecting fuel into a combustion chamber of an air compressing, spontaneous ignition, internal combustion engine |
| DE19534445A1 (de) * | 1995-09-16 | 1997-03-20 | Man Nutzfahrzeuge Ag | Einspritzventil für Brennkraftmaschinen |
| DE19844837A1 (de) * | 1998-09-30 | 2000-04-13 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463901A (en) * | 1982-07-29 | 1984-08-07 | Cummins Engine Company, Inc. | Unit fuel injector having independently controlled timing and metering |
| US4721247A (en) * | 1986-09-19 | 1988-01-26 | Cummins Engine Company, Inc. | High pressure unit fuel injector |
| US5094397A (en) * | 1991-02-11 | 1992-03-10 | Cummins Engine Company, Inc | Unit fuel injector with injection chamber spill valve |
| DE4211651B4 (de) * | 1992-04-07 | 2004-11-18 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen |
| DE19531652A1 (de) * | 1995-08-29 | 1997-05-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| JPH10122090A (ja) * | 1996-10-14 | 1998-05-12 | Komatsu Ltd | ディーゼルエンジンの燃料噴射装置 |
| DE19817320C1 (de) * | 1998-04-18 | 1999-11-11 | Daimler Chrysler Ag | Einspritzventil für Kraftstoffeinspritzsysteme |
| DE19837813A1 (de) * | 1998-08-20 | 2000-02-24 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
-
1999
- 1999-11-08 DE DE19953562A patent/DE19953562A1/de not_active Ceased
-
2000
- 2000-10-20 CZ CZ20012471A patent/CZ295573B6/cs not_active IP Right Cessation
- 2000-10-20 KR KR1020017008523A patent/KR100665935B1/ko not_active Expired - Fee Related
- 2000-10-20 JP JP2001536870A patent/JP2003514189A/ja not_active Withdrawn
- 2000-10-20 US US09/869,907 patent/US6758409B1/en not_active Expired - Fee Related
- 2000-10-20 EP EP00979439A patent/EP1144846B1/de not_active Expired - Lifetime
- 2000-10-20 WO PCT/DE2000/003694 patent/WO2001034967A1/de not_active Ceased
- 2000-10-20 DE DE50014918T patent/DE50014918D1/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1910143A1 (de) * | 1969-02-28 | 1970-11-05 | Kloeckner Humboldt Deutz Ag | Elektrisch steuerbares Einspritzventil |
| DE3533085A1 (de) | 1985-09-17 | 1987-03-26 | Bosch Gmbh Robert | Zumessventil zur dosierung von fluessigkeiten oder gasen |
| US5280773A (en) * | 1989-11-03 | 1994-01-25 | Man Nutzfahrzeuge Ag | Method and apparatus for injecting fuel into a combustion chamber of an air compressing, spontaneous ignition, internal combustion engine |
| DE19534445A1 (de) * | 1995-09-16 | 1997-03-20 | Man Nutzfahrzeuge Ag | Einspritzventil für Brennkraftmaschinen |
| DE19844837A1 (de) * | 1998-09-30 | 2000-04-13 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161945A1 (de) * | 2014-04-22 | 2015-10-29 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für brennkraftmaschinen und ein verfahren zum betreiben desselben |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1144846A1 (de) | 2001-10-17 |
| US6758409B1 (en) | 2004-07-06 |
| KR20010093246A (ko) | 2001-10-27 |
| CZ295573B6 (cs) | 2005-08-17 |
| JP2003514189A (ja) | 2003-04-15 |
| DE19953562A1 (de) | 2001-05-23 |
| CZ20012471A3 (cs) | 2002-11-13 |
| DE50014918D1 (de) | 2008-03-06 |
| KR100665935B1 (ko) | 2007-01-09 |
| EP1144846B1 (de) | 2008-01-16 |
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