IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0277655
(2002-10-21)
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발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
19 인용 특허 :
4 |
초록
▼
A self-regulating direct injection fuel delivery system for a motor vehicle includes a common rail having an accumulator including a relatively large fuel volume. The accumulator is connected in fluid communication with a distributor having a relatively small fuel volume and at least one fuel inject
A self-regulating direct injection fuel delivery system for a motor vehicle includes a common rail having an accumulator including a relatively large fuel volume. The accumulator is connected in fluid communication with a distributor having a relatively small fuel volume and at least one fuel injector nozzle is connected in direct fluid communication with the distributor. A high-pressure pump for delivering fuel to the common rail is provided and a flow control device is interposed between the pump and the common rail for selectively delivering fuel to one of the accumulator and the distributor and then the other of the accumulator and the distributor.
대표청구항
▼
A self-regulating direct injection fuel delivery system for a motor vehicle includes a common rail having an accumulator including a relatively large fuel volume. The accumulator is connected in fluid communication with a distributor having a relatively small fuel volume and at least one fuel inject
A self-regulating direct injection fuel delivery system for a motor vehicle includes a common rail having an accumulator including a relatively large fuel volume. The accumulator is connected in fluid communication with a distributor having a relatively small fuel volume and at least one fuel injector nozzle is connected in direct fluid communication with the distributor. A high-pressure pump for delivering fuel to the common rail is provided and a flow control device is interposed between the pump and the common rail for selectively delivering fuel to one of the accumulator and the distributor and then the other of the accumulator and the distributor. id at least one of the detected intake air temperature and the detected engine speed. 7. A variable valve timing apparatus according to claim 1, wherein the predetermined period of time is corrected based on engine speed. 8. A variable valve timing apparatus according to claim 1, wherein the predetermined period of time is corrected based on engine temperature. 9. A variable valve timing apparatus comprising: an exhaust valve that closes during an intake stroke after a top dead center succeeding an exhaust stroke; an intake valve timing varying unit for selectively varying an open timing of the intake valve, said intake valve timing varying unit being capable of advancing the open timing of the intake valve such that the intake valve opens during the exhaust stroke; a control unit for controlling said intake valve timing varying unit such that, at a cold start of an engine, an overlap in an open time between the exhaust valve and the intake valve lies in the intake stroke, and such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve thereafter; and an exhaust valve timing varying unit for selectively varying controlling a close timing of the exhaust valve, said exhaust valve timing varying unit being capable of retarding the close timing of the exhaust valve such that the exhaust valve closes during the intake stroke, wherein said control unit controls said intake valve timing varying unit and said exhaust valve timing varying unit such that, at the cold start of the engine, the overlap in the open time between the exhaust valve and the intake valve lies in the intake stroke, and such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve thereafter. 10. A variable valve timing apparatus according to claim 9, wherein the overlap that lies in the exhaust stroke is increased while the control unit advances the close timing of the exhaust valve. 11. A variable valve timing apparatus according to claim 9, wherein said control unit advances the close timing of the exhaust valve after increasing the overlap that lies in the exhaust stroke. 12. A variable valve timing apparatus, comprising: an exhaust valve that closes during an intake stroke after a top dead center succeeding an exhaust stroke; an intake valve timing varying unit for selectively varying an open timing of the intake valve, said intake valve timing varying unit being capable of advancing the open timing of the intake valve such that the intake valve opens during the exhaust stroke; and a control unit for controlling said intake valve timing varying unit such that, at a cold start of an engine, an overlap in an open time between the exhaust valve and the intake valve lies in the intake stroke, and such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve thereafter, wherein said control unit maintains the overlap at zero until the overlap that lies in the intake stroke is established. 13. A variable valve timing apparatus, comprising: an exhaust valve that closes during an intake stroke after a top dead center succeeding an exhaust stroke; an intake valve timing varying unit for selectively varying an open timing of the intake valve, said intake valve timing varying unit being capable of advancing the open timing of the intake valve such that the intake valve opens during the exhaust stroke; and a control unit for controlling said intake valve timing varying unit such that, at a cold start of an engine, an overlap in an open time between the exhaust valve and the intake valve lies in the intake stroke, and such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve thereafter, wherein said control unit changes from the overlap that lies in the intake stroke to the overlap that lies in the exhaust stroke at a predetermined time after a first combustion of the engine. 14. A method of varyin g a valve timing, comprising: controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke for a predetermined period of time; and controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve thereafter. 15. The method of claim 14, further comprising: maintaining a time period in which the overlap lies in the intake stroke substantially longer than a time period in which the overlap lies in the exhaust stroke. 16. The method of claim 14, further comprising: detecting an operating state of the engine; and delaying at least one of the steps of controlling the open timing of the intake valve based on the detected operating state. 17. The method of claim 16, wherein said detecting step includes the step of, detecting an engine temperature and at least one of an intake air temperature and an engine speed, and said delaying step includes the step of, delaying a point of time at which the intake valve open timing is controlled according to a reference value determined based on the detected engine temperature, said reference value being compensated by said at least one of the detected intake air temperature and the detected engine speed. 18. The method of claim 14, further comprising the step of: detecting an engine speed; and correcting the predetermined period of time based on the detected engine speed. 19. The method of claim 14, further comprising the step of: detecting an engine temperature; and correcting the predetermined period of time based on the detected engine temperature. 20. A method of varying a valve timing comprising: controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke; controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve; and maintaining the overlap at zero until the overlap that lies in the intake stroke is established. 21. A method of varying a valve timing, comprising: controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke; controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve; and increasing the overlap that lies in the exhaust stroke while the close timing of the exhaust valve is being advanced. 22. A method of varying a valve timing comprising controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke; controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve; and changing from the overlap that lies in the intake stroke to the overlap that lies in the exhaust stroke at a predetermined time after a first combustion of the engine. 23. A method of varying a valve timing comprising: controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke; controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve; and advancing the close ti ming of the exhaust valve after increasing the overlap that lies in the exhaust stroke. 24. A method of varying a valve timing, comprising: controlling an open timing of an intake valve such that, at a cold start of an engine, an overlap in an open time between an exhaust valve and the intake valve lies in an intake stroke after a top dead center succeeding an exhaust stroke; controlling the open timing of the intake valve such that the overlap lies in the exhaust stroke by advancing the open timing of the intake valve; detecting an operating state of the engine; and reducing a speed at which the open timing of the intake valve is changed based on the detected operating state. 25. The method of claim 24, wherein said detecting step includes the step of, detecting an engine temperature and at least one of an intake air temperature and an engine speed, and said reducing step includes the step of, reducing the speed according to a reference value determined based on the detected engine temperature, said reference value being compensated by said at least one of the detected intake air temperature and the detected engine speed. y acts as a flat sealing surface.
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