Injection system and method for producing an injection system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02D-001/06
F02M-047/02
B05B-001/08
F02M-061/00
B05B-001/30
출원번호
US-0306459
(2006-10-02)
등록번호
US-8807450
(2014-08-19)
우선권정보
DE-10 2006 031 567 (2006-07-07)
국제출원번호
PCT/EP2006/009554
(2006-10-02)
§371/§102 date
20090223
(20090223)
국제공개번호
WO2008/003347
(2008-01-10)
발명자
/ 주소
Kronberger, Maximilian
출원인 / 주소
Continental Automotive GmbH
대리인 / 주소
King & Spalding L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
21
초록▼
An injection system (1) for injecting fuel at a predetermined fuel pressure has: an actuator (2, 3) providing a stroke for lifting an injector needle (4) that opens a nozzle into which the fuel is injected; a leverage apparatus (5) for translating the provided stroke into a modified stroke, the appa
An injection system (1) for injecting fuel at a predetermined fuel pressure has: an actuator (2, 3) providing a stroke for lifting an injector needle (4) that opens a nozzle into which the fuel is injected; a leverage apparatus (5) for translating the provided stroke into a modified stroke, the apparatus has a compensating device (6) coupled to the actuator (2, 3), and a lever device (7), which is coupled to the injector needle (4), wherein the lever device has at least two symmetrically disposed, single-arm levers (8a, 8b), which each come in contact with an injector needle head (10) of the injector needle (4) when lifting the injector needle (4) by means of a single needle head support (9a, 9b); and wherein the compensating device (6) is suited to compensate a varying force application of the actuator (2, 3) on the single-arm lever (8a, 8b).
대표청구항▼
1. An injection system for injection of fuel at a predetermined fuel pressure comprising: an actuator, which provides a stroke for lifting an injector needle in an axial direction which opens a nozzle into which the fuel is injected;a lever transmission facility for translating the stroke provided i
1. An injection system for injection of fuel at a predetermined fuel pressure comprising: an actuator, which provides a stroke for lifting an injector needle in an axial direction which opens a nozzle into which the fuel is injected;a lever transmission facility for translating the stroke provided into a modified stroke, which lever transmission facility comprises a compensation device which is coupled to the actuator and a lever device which is coupled to the injector needle,wherein the stroke provided by the actuator drives the compensation device in a first direction toward the injector needle;wherein the lever device comprises at least two symmetrically-arranged single-arm levers which each contact an injector needle head of the injector needle during lifting of the injector needle, wherein each single-arm lever forms a substantially U-shaped semicircle in a plane perpendicular to the axial direction, such that the at least two single-arm levers generally form a circle in the plane perpendicular to the axial direction;wherein the single-arm levers provide a coupling between the compensation device and the injector needle such that the single-arm levers convert a translation of the compensation device, driven by the actuator, in the first direction to a translation of the injector needle in a second, opposite direction; andwherein the compensation device is suitable for compensating for a different force effect of the actuator on the single-arm levers. 2. The injection system according to claim 1, wherein the actuator is embodied as a magnetic actuator or as a piezoactuator. 3. The injection system according to claim 2, wherein the magnetic actuator has a flat armature or a plunger armature. 4. The injection system according to claim 3, wherein the magnetic actuator with the plunger armature has an ancillary air gap. 5. The injection system according to claim 3, wherein the magnetic actuator with the flat armature has a torus coil or a toroidal coil. 6. The injection system according to claim 1, wherein the single-arm levers are separated from each other by means of a separation gap. 7. The injection system according to claim 2, wherein a hydraulic compensator is provided which comprises a compensator bowl and a piston engaging in the compensator bowl, with a space being embodied between the compensator bowl and the piston which is filled with a fluid, with the space being coupled for hydraulic compensation to a compensation volume via a flow gap. 8. The injection system according to claim 7, wherein a base plate of the piezoactuator is coupled to the compensator bowl and the compensation device comprises the piston. 9. The injection system according to claim 7, wherein a base plate of the piezoactuator is coupled to the piston and the compensation device comprises the compensator bowl. 10. The injection system according to claim 2, wherein the piezoactuator comprises a controllable piezo stack which, depending on a control signal, provides the stroke for actuating the injector needle in a closing direction or in an opening direction. 11. A method for manufacturing an injection system for injection of fuel at a predetermined fuel pressure comprising the following steps: arranging an actuator in a housing of the injection system, which provides a stroke for lifting an injector needle in an axial direction which opens a nozzle into which the fuel is injected;coupling the actuator to a lever translation facility for translating the stroke provided into a modified stroke, which lever transmission facility comprises a compensation device which is coupled to the actuator, and a lever device which is coupled to the injector needle, wherein the stroke provided by the actuator drives the compensation device in a first direction toward the injector needle, with the lever device comprising at least two symmetrically-arranged single-arm levers that each contact an injector needle head of the injector needle for lifting the injector needle, wherein each single-arm lever forms a substantially U-shaped semicircle in a plane perpendicular to the axial direction, such that the at least two single-arm levers generally form a circle in the plane perpendicular to the axial direction, andwherein the single-arm levers provide a coupling between the compensation device and the injector needle such that the single-arm levers converts a translation of the compensation device, driven by the actuator, in the first direction to a translation of the injector needle in a second, opposite direction, and wherein the compensation device is operable to compensate for a different force effect of the actuator on the single-arm levers. 12. The method according to claim 11, wherein the modified stroke is an increased stroke. 13. The injection system according to claim 3, wherein the magnetic actuator with the flat armature has a torus coil or a toroidal coil, wherein the flat armature has a square cross-section. 14. The injection system according to claim 7, wherein the fluid is the fuel. 15. A method for injection of fuel at a predetermined fuel pressure comprising the steps of: providing a stroke by an actuator for lifting an injector needle in an axial direction which opens a nozzle into which the fuel is injected; andtranslating the stroke provided into a modified stroke by a compensation device coupled to and driven by the actuator and coupled to a lever device which is coupled to the injector needle, wherein the stroke provided by the actuator drives the compensation device in a first direction toward the injector needle, wherein the lever device comprises first and second symmetrically-arranged single-arm levers which each contact an injector needle head of the injector needle during lifting of the injector needle; wherein each single-arm lever forms a substantially U-shaped semicircle in a plane perpendicular to the axial direction, such that the at least two single-arm levers generally form a circle in the plane perpendicular to the axial direction, wherein the single-arm levers provide a coupling between the compensation device and the injector needle such that the single-arm levers convert a stroke of the compensation device, driven by the actuator, in the first direction to a translation of the injector needle in a second, opposite direction;and wherein the compensation device is suitable for compensating for a different force effect of the actuator on the single-arm levers. 16. The method according to claim 15, comprising the step of separating the single-arm levers from each other by means of a separation gap. 17. The method according to claim 15, comprising the step of providing a hydraulic compensator which comprises a compensator bowl and a piston engaging in the compensator bowl, with a space being embodied between the compensator bowl and the piston which is filled with the fuel, with the space being coupled for hydraulic compensation to a compensation volume via a flow gap. 18. The method according to claim 17, comprising the step of coupling a base plate of a piezoactuator to the compensator bowl wherein the compensation device comprises the piston. 19. The method according to claim 17, comprising the step of coupling a base plate of a piezoactuator to the piston wherein the compensation device comprises the compensator bowl. 20. The method according to claim 15, comprising the step of providing the stroke for actuating the injector needle in a closing direction or in an opening direction by a piezoactuator comprising a controllable piezo stack controlled by a control signal. 21. The injection system according to claim 1, wherein the at least two single-arm levers are distinct, rigid elements.
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