IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0181570
(2000-12-15)
|
우선권정보 |
DE-0001828 (2000-01-18) |
국제출원번호 |
PCT/EP00/12777
(2000-12-15)
|
국제공개번호 |
WO01/53688
(2001-07-26)
|
발명자
/ 주소 |
- Gü
- rich, Gunter
- Laumen, Hermann Joseph
- Schmü
- cker, Karl Joachim
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
35 인용 특허 :
3 |
초록
▼
The invention relates to a fuel injection device for a reciprocating internal combustion engine, comprising a nozzle part ( 5 ) with an injection nozzle ( 13 ), said nozzle part having a pressure chamber ( 10 ) in which a nozzle needle ( 9 ) that closes the injection nozzle ( 13 ) is guided. Said no
The invention relates to a fuel injection device for a reciprocating internal combustion engine, comprising a nozzle part ( 5 ) with an injection nozzle ( 13 ), said nozzle part having a pressure chamber ( 10 ) in which a nozzle needle ( 9 ) that closes the injection nozzle ( 13 ) is guided. Said nozzle needle can be moved into the opening position when subjected to pressure by the fuel to be injected. The pressure chamber ( 10 ) is connected to a control part ( 7 ) by a connecting channel ( 6 ), this control part having a valve chamber ( 21 ) into which the connecting channel ( 6 ) and a high pressure channel ( 8 ) that is connected to a fuel supply ( 4 ) open, and in which a valve body ( 23 ) is guided. Said valve body ( 23 ) acts as a piston system and is held in the closing position by a valve spring and a valve seat ( 22 ). The nozzle part also comprises an actuator part ( 20 ) which is functionally connected to the valve body ( 23 ) and which when activated, moves said valve body in the opening direction and releases the through-flow from the high pressure channel ( 8 ) into the connecting channel ( 6 ).
대표청구항
▼
1. A fuel injection device for a reciprocating internal combustion engine, having a nozzle part ( 5 ) with an injection nozzle ( 13 ), which part has a pressure chamber ( 10 ) in which the nozzle needle ( 9 ) that closes the injection nozzle ( 13 ) is guided, which needle is movable in the opening p
1. A fuel injection device for a reciprocating internal combustion engine, having a nozzle part ( 5 ) with an injection nozzle ( 13 ), which part has a pressure chamber ( 10 ) in which the nozzle needle ( 9 ) that closes the injection nozzle ( 13 ) is guided, which needle is movable in the opening position upon imposition of pressure by the fuel to be injected, wherein the pressure chamber ( 10 ) communicates via a connecting channel ( 6 ) with a control part ( 7 ) which has a valve chamber ( 21 ), into which the connection to channel ( 6 ) on the one hand and a high-pressure channel ( 8 ), communicating with a fuel supply ( 4 ), on the other hand for discharging, and in which a valve body ( 23 ) acting as a piston system is guided, which body is kept in the closing position on a valve seat ( 22 ) by a valve spring ( 24 ), and having an actuator ( 20 ), which is operatively connected to the valve body ( 23 ) and which moves the valve body in the opening direction upon activation and enables the flow from the high-pressure channel ( 8 ) into the connecting channel ( 6 ), and having a compensation piston ( 25 ; 42 ) which is acted upon counter to the force action of the actuator via the pressure in the connecting channel ( 6 ). 2. The fuel injection device of claim 1, characterized in that the compensation piston ( 26 ), which can be acted upon via the pressure in the connecting channel ( 6 ), is disposed on the valve body, on its end ( 25 ) remote from the actuator ( 20 ). 3. The fuel injection device of claim 1, characterized in that the connecting channel ( 6 ) is provided with a relief valve ( 27 ), which opens toward the low-pressure side ( 17 ) of the fuel supply ( 14 ), and which is closed upon activation of the actuator ( 20 ). 4. The fuel injection device of claim 1, characterized in that a tension spring ( 20 . 5 ) is disposed between the actuator ( 20 ) and the valve body ( 23 ). 5. The fuel injection device of claim 1, characterized in that the actuator ( 20 ) has a transmission piston ( 20 . 3 ), and the end of the valve body ( 23 ) oriented toward the actuator ( 20 ) has a pressure piston ( 23 . 1 ), and that between the two pistons, a hydraulic chamber ( 20 . 4 ) is disposed, and the diameter of the pressure piston ( 23 . 1 ) is less than the diameter of the transmission piston ( 20 . 3 ). 6. The fuel injection device of claim 1, characterized in that the diameter of the compensation piston ( 25 ), depending on the desired force feedback is less than, equal to, or greater than the diameter of the part of the piston system of the valve body ( 23 ) that acts in the opening direction upon imposition of pressure. 7. The fuel injection device of claim 1, characterized in that the actuator ( 20 ), with respect to its adjustment travel, is embodied adjustingly in proportion to the adjustment energy applied. 8. The fuel injection device of claim 1, characterized in that an electrical actuator ( 20 ) is provided, which is embodied adjustingly in proportion to voltage with respect to its adjustment travel. 9. The fuel injection device of claim 1, characterized in that an electrical actuator ( 20 ) is provided, which is embodied adjustingly in proportion to current with respect to its adjustment travel. 10. The fuel injection device of claim 1, characterized in that the control part ( 7 ) has a pressure divider ( 30 ), which communicates on the one hand with the high-pressure channel ( 6 ) and on the other with the valve body ( 23 ) forming a piston system, the valve body having a pressure compensation piston ( 23 . 1 ; 42 ) acting as a compensation piston, which can be acted upon by the pressure acting in the connecting channel ( 6 ), counter to the actuator force, and which is adjustable via the actuator. 11. The fuel injection device of claim 1, characterized in that a pressure divider ( 30 ) is operatively connected to a relief valve ( 27 ). 12. The fuel injection device of claim 11, characterized in that the relief val ve ( 27 ) has a valve spring ( 27 . 3 ), acting on a valve body ( 27 . 2 ) in the closing direction, and a piston ( 27 . 1 ) which can additionally be acted upon in the closing direction via the pressure divider ( 30 ). 13. The fuel injection device of claim 1, characterized in that a pressure divider ( 30 ) is embodied as a 3/2-way valve, and the two valve seats of the 3/2-way valve represent two throttle restrictions of the pressure divider ( 30 ). 14. The fuel injection device of claim 1, characterized in that a valve seat ( 35 . 2 ) of a pressure divider ( 30 ) is embodied as a flat seat.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.