IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0750160
(2007-05-17)
|
등록번호 |
US-7637252
(2010-01-07)
|
우선권정보 |
DE-10 2006 023 470(2006-05-18) |
발명자
/ 주소 |
- Jung, Uwe
- Radeczky, Janos
- Wirkowski, Michael
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
6 |
초록
▼
A common rail injection system for an internal combustion engine has at least one combustion chamber, a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing fuel pinj at injection pressure in relation to the environment of
A common rail injection system for an internal combustion engine has at least one combustion chamber, a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing fuel pinj at injection pressure in relation to the environment of the common rail injection system, an injector connected to the high pressure fuel accumulator for delivering fuel into the at least one combustion chamber, and a return line for returning fuel from the injector to the high pressure fuel pump. The fuel is pressurized by a return line pressure pdrain in relation to the environment of the common rail injection system. It is proposed that the common rail injection system has an adjusting means for adjusting the return line pressure pdrain. It is additionally proposed to use a pressure control means in the fuel leakage flow feedback system of an internal combustion engine.
대표청구항
▼
What is claimed is: 1. A common rail injection system for an internal combustion engine having at least one combustion chamber, comprising: a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing injection-pressurized fuel
What is claimed is: 1. A common rail injection system for an internal combustion engine having at least one combustion chamber, comprising: a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing injection-pressurized fuel in relation to the environment of the common rail injection system, an injector connected to the high pressure fuel accumulator for delivering fuel into the at least one combustion chamber, a throttle valve, a return line for returning fuel from the injector to the high pressure fuel pump said returning fuel being pressurized by a return line pressure in relation to the environment of the common rail injection system, a buffer store arranged in the return line, an adjusting means for adjusting the return line pressure and the buffer store pressure, and a direct connecting line, connecting the high pressure fuel accumulator and the buffer store, wherein the throttle valve is arranged in the direct connecting line between the high pressure fuel accumulator and the buffer store. 2. The common rail injection system according to claim 1, wherein the adjusting means comprises a pressure control valve behind the injector. 3. The common rail injection system according to claim 1, wherein the adjusting means comprises a pressure control valve behind the injector and the pressure control valve is arranged behind the buffer. 4. The common rail injection system according to claim 1, wherein the throttle valve bypasses the injector via the direct connecting line and is connected to the return line upstream of the adjusting means. 5. The common rail injection system according to claim 1, wherein the injector comprises a switching means for bringing the injector into an open position and a closed position, with the injector only delivering fuel into the combustion chamber when the switching means is in the open position. 6. The common rail injection system according to claim 5, wherein the switching means can be actuated by means of injection-pressurized fuel. 7. The common rail injection system according to claim 1, wherein the high pressure fuel pump comprises two compressor parts, with the first compressor part being connected to the buffer store and the high pressure fuel accumulator and the second compressor part being connected to the fuel tank. 8. An internal combustion engine comprising a common rail injection system comprising: a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing injection-pressurized fuel in relation to the environment of the common rail injection system, an injector connected to the high pressure fuel accumulator for delivering fuel into the at least one combustion chamber, a throttle valve, a return line for returning fuel from the injector to the high pressure fuel pump said returning fuel being pressurized by a return line pressure in relation to the environment of the common rail injection system, a buffer store arranged in the return line, and an adjusting means for adjusting the return line pressure and the buffer store pressure, and a direct connecting line, connecting the high pressure fuel accumulator and the buffer store, wherein the throttle valve is arranged in the direct connecting line between the high pressure fuel accumulator and the buffer store. 9. The internal combustion engine according to claim 8, wherein the adjusting means comprises a pressure control valve behind the injector. 10. The internal combustion engine according to claim 8, wherein the adjusting means comprises a pressure control valve behind the injector and the pressure control valve is arranged behind the buffer. 11. The internal combustion engine according to claim 8, wherein the throttle valve bypasses the injector via the direct connecting line and is connected to the return line upstream of the adjusting means. 12. The internal combustion engine according to claim 8, wherein the injector comprises a switching means for bringing the injector into an open position and a closed position, with the injector only delivering fuel into the combustion chamber when the switching means is in the open position. 13. The common rail injection system according to claim 12, wherein the switching means can be actuated by means of injection-pressurized fuel. 14. The common rail injection system according to claim 8, wherein the high pressure fuel pump comprises two compressor parts, with the first compressor part being connected to the buffer store and the high pressure fuel accumulator and the second compressor part being connected to the fuel tank. 15. A method of using of a pressure control in the fuel leakage flow feedback system of an internal combustion engine, comprising the steps of supplying fuel by a high pressure fuel pump, storing injection-pressurized fuel in relation to the environment of the common rail injection system by a high pressure fuel accumulator connected to the high pressure fuel pump, delivering fuel into the at least one combustion chamber by an injector connected to the high pressure fuel accumulator, returning fuel from the injector to the high pressure fuel pump, said returning fuel being pressurized by a return line pressure in relation to the environment of the common rail injection system, and adjusting the return line pressure, storing fuel in a buffer store of the return line, and passing fuel from the high pressure fuel accumulator to the buffer store via a direct connecting line and adjusting a pressure difference between the high pressure fuel accumulator and the buffer store via a throttle valve in the direct connecting line. 16. The method according to claim 15, further comprising the step of bringing the injector into an open position and a closed position, wherein the injector only delivering fuel into the combustion chamber when the switching means is in the open position. 17. The method according to claim 15, wherein the switching is performed by injection-pressurized fuel.
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