EP3359800A1 - Aktuator mit ventileinheit für piezoservobetriebenen injektor - Google Patents
Aktuator mit ventileinheit für piezoservobetriebenen injektorInfo
- Publication number
- EP3359800A1 EP3359800A1 EP16774945.6A EP16774945A EP3359800A1 EP 3359800 A1 EP3359800 A1 EP 3359800A1 EP 16774945 A EP16774945 A EP 16774945A EP 3359800 A1 EP3359800 A1 EP 3359800A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- actuator
- housing
- actuator housing
- biasing
- 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
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
Definitions
- Actuator with piezo valve unit for servo-driven injector The present invention relates to an actuator with piezo Ven ⁇ tiliser for a servo-driven injector.
- the present invention is based on the object, an actuator with valve unit for a piezoservo counselenen To provide injector available, which is particularly simple and thereby has an effective mode of operation on ⁇ .
- an actuator with a valve unit for a piezo-piezo-driven injector which comprises the following components:
- An interior housing forming an outer housing, extending through the interior of the outer housing and connected thereto solid bottom plate, extending through the bottom plate movable actuator housing within the outer housing, a disposed between the fixed bottom plate and a top plate of the movable actuator housing piezoelectric element, one with a valve seat cooperating movable Ven ⁇ tilelement, a force transmission device between the actuator housing and the movable valve element, a biasing the actuator housing in the direction of the valve element first biasing element and the power transmission device in the direction of the valve element biasing second biasing element, wherein by an increase in length of the piezoelectric element, the actuator housing against the first biasing element and thereby the power transmission device against the second biasing element for lifting the valve element from the valve seat is movable.
- the solution according to the invention makes it possible to control a valve unit so that it works with the pressure and not against the pressure, this control being performed by a piezoactuator.
- the inventively achieved reversal of the displacement of the valve element is achieved by the housing of the piezoelectric element that moves the force transmission device against the second biasing element at a length increase of the piezoelectric element so that the valve element is lifted in the direction of the applied pressure from the valve seat.
- the piezoelectric element is supported on the fixed base plate and the top plate of the movable actuator housing, so that upon extension of the piezoelectric element a corresponding movement of the actuator housing is initiated.
- the actuator housing extends through the solid bottom plate.
- valve unit and thus the injector open by itself when the pressure in the system rises too much. In this way, a pressure relief valve can be avoided.
- This valve position is stable and allows pressure reduction by generating dynamic leakage without injection. A pressure control valve is not needed.
- the first biasing member urging the actuator housing against the valve opening direction is located outside of the actuator housing in this embodiment, thereby simplifying the overall construction of the actuator.
- Piezoaktuators combined. In this way, a one ⁇ injection system can be designed without pressure relief valve or pressure control valve.
- the force transmission device preferably comprises a valve piston, wherein this valve piston has a cooperating with the inner wall of the actuator housing end flange in a special embodiment.
- the actuator housing when the piezo element is extended, the actuator housing is moved away from the valve unit, thereby moving the valve piston extending through its opening against the second biasing element, so that the valve element can open by the applied pressure. Conversely, upon contraction of the valve element, the actuator housing is moved toward the valve unit, whereby the valve piston, due to the force of the second biasing element, can again press the valve element against its seat to close the valve unit.
- the inventively provided base plate through which the actuator housing extends is preferably fixed by a plurality of welds on the outer housing of the actuator. This is expediently carried out via projections of the base plate, so that slots are formed between the base plate and the outer housing, through which the actuator housing extends and can carry out its movement initiated by the piezoelectric element.
- the outer housing and the actuator housing arranged therein are cylindrical, so that the slots are configured as round slots.
- the bottom plate can preferably be fixed by two or four approaches by welding points on the outer housing, between each of which a slot is formed.
- the power transmission device comprises a lever device to allow a corresponding loading of the valve element.
- Figure 2 shows a horizontal section through the actuator with a
- the actuator shown in Figure 1 in longitudinal section with valve ⁇ unit has an outer housing 1, which forms an interior, in which an actuator housing 2 is arranged up and down movable.
- a bottom plate 4 is welded, as indicated by the welds 5.
- the horizontal section shown in Figure 2 shows the bottom plate 4 in plan view, which is welded via two projections 12 via the welds 5 with the inner wall of the outer housing 1.
- two semicircular slots 13 are formed in the bottom plate 4, through which the wall of the cylindrically shaped actuator housing 2 extends. The actuator housing 2 can thus move up and down through the slots 13 of the base plate 4.
- the actuator housing 2 is closed at its end remote from the valve unit and has a top plate 14 there. At the opposite end, the actuator housing 2 has a central opening 6, through which a valve piston 7 extends, which has an inside the actuator housing 2 ange ⁇ arranged end flange 15. The end flange 15 engages behind the wall region of the actuator housing 2 arranged adjacent to the opening 6.
- the valve piston 7 cooperates with a valve element 8, which cooperates with a valve seat 9.
- the valve element 8 opens and closes a channel 16, via the fuel of a
- Injection nozzle is supplied.
- a piezoelectric element 3 is arranged between the top plate 14 of the actuator 2 and the fixed base plate 4, a piezoelectric element 3 is arranged.
- a first biasing element 11 in the form of a spring pushes down the actuator housing 3 in Figure 1, and a second biasing element 10 is disposed between the valve piston 7 and the bottom plate 4 and pushes the valve piston 7 in Figure 1 down against the valve element 8 and this against the valve seat 9 to close the channel 16.
- the actuator works in the following way:
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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015219568.6A DE102015219568B4 (de) | 2015-10-09 | 2015-10-09 | Aktuator mit Ventileinheit für piezoservobetriebenen Injektor |
| PCT/EP2016/073363 WO2017060163A1 (de) | 2015-10-09 | 2016-09-29 | Aktuator mit ventileinheit für piezoservobetriebenen injektor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3359800A1 true EP3359800A1 (de) | 2018-08-15 |
| EP3359800B1 EP3359800B1 (de) | 2020-12-30 |
Family
ID=57044965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16774945.6A Active EP3359800B1 (de) | 2015-10-09 | 2016-09-29 | Aktuator mit ventileinheit für piezoservobetriebenen injektor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3359800B1 (de) |
| DE (1) | DE102015219568B4 (de) |
| WO (1) | WO2017060163A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19702066C2 (de) * | 1997-01-22 | 1998-10-29 | Daimler Benz Ag | Piezoelektrischer Injektor für Kraftstoffeinspritzanlagen von Brennkraftmaschinen |
| DE19901711A1 (de) * | 1999-01-18 | 2000-07-20 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zum Betreiben eines Brennstoffeinspritzventils |
| DE19921489A1 (de) * | 1999-05-08 | 2000-11-09 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| DE19946869A1 (de) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| DE19947779A1 (de) * | 1999-10-02 | 2001-04-12 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| DE102005016461A1 (de) * | 2005-04-11 | 2006-10-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| JP6194097B2 (ja) | 2014-02-24 | 2017-09-06 | 株式会社フジキン | 圧電式リニアアクチュエータ、圧電駆動バルブ、及び、流量制御装置 |
-
2015
- 2015-10-09 DE DE102015219568.6A patent/DE102015219568B4/de not_active Revoked
-
2016
- 2016-09-29 EP EP16774945.6A patent/EP3359800B1/de active Active
- 2016-09-29 WO PCT/EP2016/073363 patent/WO2017060163A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3359800B1 (de) | 2020-12-30 |
| DE102015219568A1 (de) | 2017-04-13 |
| DE102015219568B4 (de) | 2017-06-08 |
| WO2017060163A1 (de) | 2017-04-13 |
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