IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0420861
(2003-04-23)
|
우선권정보 |
DE-0018024 (2002-04-23) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
The fuel injection device has a high-pressure pump that supplies highly pressurized fuel to at least one high-pressure reservoir connected to injectors disposed in cylinders of an engine, wherein the injectors are connected to a common low-pressure reservoir. A pressure holding valve maintains a pre
The fuel injection device has a high-pressure pump that supplies highly pressurized fuel to at least one high-pressure reservoir connected to injectors disposed in cylinders of an engine, wherein the injectors are connected to a common low-pressure reservoir. A pressure holding valve maintains a predetermined low pressure in the low-pressure reservoir. A pressure regulating valve regulates the pressure in the high-pressure reservoir by diverting fuel from the at least one high-pressure reservoir through a diversion connection into a low-pressure region. The diversion connection of the pressure regulating valve is connected to the low-pressure reservoir so that the low-pressure reservoir is filled with fuel.
대표청구항
▼
1. A fuel injection device for an internal combustion engine, comprisingat least one high pressure reservoir ( 12 )a high-pressure pump ( 10 ) that supplies highly pressurized fuel to the at least one high-pressure reservoir ( 12 ),a plurality of injectors ( 20 ) disposed in cylinders of the engine
1. A fuel injection device for an internal combustion engine, comprisingat least one high pressure reservoir ( 12 )a high-pressure pump ( 10 ) that supplies highly pressurized fuel to the at least one high-pressure reservoir ( 12 ),a plurality of injectors ( 20 ) disposed in cylinders of the engine and connected to the high pressure reservoir,a common low-pressure reservoir ( 50 ) connected to said injectors ( 20 ),a pressure holding valve ( 52 ) maintaining a predetermined low pressure in the low-pressure reservoir ( 50 ),a pressure regulating valve ( 60 ) which can regulate the pressure in the high-pressure reservoir ( 12 ) by diverting fuel from the at least one high-pressure reservoir ( 12 ) through a diversion connection ( 62 ) into a low-pressure region, andthe diversion connection ( 62 ) of the pressure regulating valve ( 60 ) connected to the low-pressure reservoir ( 50 ). 2. A fuel injection device according to claim 1, further comprising a reversing valve ( 64 ) which can connect the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) with either the low-pressure reservoir ( 50 ) or a relief region ( 66 , 14 ). 3. The fuel injection device according to claim 2, wherein the reversing valve ( 64 ) is switched depending on the temperature of the fuel in such a way that at a low fuel temperature, the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the low-pressure reservoir ( 50 ) and at a high fuel temperature, the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the relief region ( 66 , 14 ). 4. The fuel injection device according to claim 3, wherein the reversing valve ( 64 ) has a switch element ( 68 ) in contact with the fuel, which switch element changes shape depending on the temperature and thus executes the switch. 5. The fuel injection device according to claim 1, wherein during starting of the engine, the pressure regulating valve ( 60 ) is triggered in such a way that it diverts fuel from the high-pressure reservoir ( 12 ), and the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the low-pressure reservoir ( 50 ). 6. The fuel injection device according to claim 2, wherein during starting of the engine, the pressure regulating valve ( 60 ) is triggered in such a way that it diverts fuel from the high-pressure reservoir ( 12 ), and the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the low-pressure reservoir ( 50 ). 7. The fuel injection device according to claim 3, wherein during starting of the engine, the pressure regulating valve ( 60 ) is triggered in such a way that it diverts fuel from the high-pressure reservoir ( 12 ), and the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the low-pressure reservoir ( 50 ). 8. The fuel injection device according to claim 4, wherein during starting of the engine, the pressure regulating valve ( 60 ) is triggered in such a way that it diverts fuel from the high-pressure reservoir ( 12 ), and the diversion connection ( 62 ) of the pressure regulating valve ( 60 ) is connected to the low-pressure reservoir ( 50 ). 9. The fuel injection device according to claim 1, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 10. The fuel injection device according to claim 2, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated wi th it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 11. The fuel injection device according to claim 3, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 12. The fuel injection device according to claim 4, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 13. The fuel injection device according to claim 5, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 14. The fuel injection device according to claim 6, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 15. The fuel injection device according to claim 7, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ). 16. The fuel injection device according to claim 8, wherein each of the injectors ( 20 ) comprises a fuel injection valve ( 22 ) with a control valve ( 24 ) that controls it, when the control valve ( 24 ) comprise a piezoelectric actuator ( 26 ) and a hydraulic pressure booster device ( 30 ) associated with it, and wherein the hydraulic pressure booster device ( 30 ) is connected to the low-pressure reservoir ( 50 ) and is filled from this low-pressure reservoir ( 50 ).
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