Device for controlling the flow of a high-pressure pump in a common-rail fuel injection system of an internal combustion engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-037/04
출원번호
US-0969422
(2001-10-02)
우선권정보
IT-TO2000A0918 (2000-10-03)
발명자
/ 주소
Ricco, Mario
Borrione, Stefano Maria
출원인 / 주소
C.F.R. Societa Consortile per Azioni
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
33인용 특허 :
9
초록▼
The common rail supplies a number of injectors of the cylinders of the engine, and is supplied by a constant-displacement high-pressure pump in turn supplied by a low-pressure, variable-delivery, variable-pressure, motor-driven pump. The control device has an electronic control unit for receiving si
The common rail supplies a number of injectors of the cylinders of the engine, and is supplied by a constant-displacement high-pressure pump in turn supplied by a low-pressure, variable-delivery, variable-pressure, motor-driven pump. The control device has an electronic control unit for receiving signals indicating operating conditions of the engine; the suction side of the high-pressure pump has a choke; and the control unit controls the motor-driven pump to vary the fuel pressure upstream from the choke between a predetermined maximum value and a predetermined minimum value, so as to regulate the fuel intake of the high-pressure pump within a predetermined range.
대표청구항▼
1. A device for controlling the flow of a high-pressure pump in a common-rail fuel injection system of an internal combustion engine, wherein said high-pressure pump is a constant-displacement type and is supplied with fuel by a low-pressure, variable-delivery, variable-pressure motor-driven pump, t
1. A device for controlling the flow of a high-pressure pump in a common-rail fuel injection system of an internal combustion engine, wherein said high-pressure pump is a constant-displacement type and is supplied with fuel by a low-pressure, variable-delivery, variable-pressure motor-driven pump, the device comprising: a choke on the suction side of said high-pressure pump; and means for controlling said low-pressure pump to vary fuel pressure upstream from said choke between a maximum predetermined value and a minimum predetermined value, so as to regulate fuel intake by said high-pressure pump within a predetermined range, said means comprising an electronic control unit for receiving signals indicating the operating conditions of the engine and unit controlling said motor-driven pump as a function of said signals; wherein said control unit receives signals indicating the fuel pressure upstream from said choke and feedback-controls said motor-driven pump. 2. A device as claimed in claim 1, wherein said control unit controls the supply current of said motor-driven pump to directly vary the fuel pressure upstream from said choke. 3. A device as claimed in claim 1, wherein said control unit controls the supply voltage of said motor-driven pump to vary fuel flow to said choke, and so vary the fuel pressure upstream from said choke. 4. A device as claimed in claim 3, wherein said control unit controls said motor-driven pump between a predetermined maximum flow and a predetermined minimum flow by varying the pressure upstream from said choke between said maximum value, when said flow is the predetermined maximum, and said minimum value, when said flow is the predetermined minimum. 5. A device as claimed in claim 1, wherein said choke is located upstream from said high-pressure pump or inside said high-pressure pump. 6. A device as claimed in claim 5, wherein a delivery conduit of said motor-driven pump is located between said motor-driven pump and said high-pressure pump and wherein said choke is located on said delivery conduit. 7. A device as claimed in claim 5, wherein said high-pressure pump has a number of pumping elements, and comprises a number of intake conduits of said pumping elements communicating with a delivery conduit of said motor-driven pump, and wherein said choke is located on each of said intake conduits. 8. A device as claimed in claim 4, wherein said minimum flow is equal to a fraction of said maximum flow. 9. A device as claimed in claim 4, wherein said minimum flow is equal to one-half said maximum flow. 10. A device as claimed in claim 4, wherein said fuel flow in said delivery conduit ranges between 40 and 80 liters/hour. 11. A device as claimed in claim 4, wherein the variation in fuel flow in said delivery conduit is substantially proportional to the variation in pressure upstream from said choke. 12. A device as claimed in claim 10, wherein said maximum pressure value upstream from said choke is about 2.5 bars, and said minimum pressure value is about 0.6 bar. 13. A device as claimed in claim 10, wherein the diameter of said choke is about 0.9 mm.
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이 특허에 인용된 특허 (9)
Ulrich Augustin DE; Reda Rizk DE; Raimondo Giavi DE, Configuration and method for amplifying the pressure of fuel for a fuel injector.
Arnold Bernhard,DEX ; Eisenbacher Egon,DEX ; Pawellek Franz,DEX, Control for a fluid pressure supply system, particularly for high pressure in a fuel injection system.
Heinitz Dirk,DEX ; Larisch Benno,DEX ; Hecker Martin,DEX, Device and method for regulating a pressure in accumulator injection systems having an electromagnetically actuated pressure adjusting element.
Ricco, Mario; De Matthaeis, Sisto Luigi; Ricco, Raffaele; Lepore, Domenico, Accumulation-volume fuel injection system for an internal-combustion engine.
Surnilla, Gopichandra; Meinhart, Mark; Basmaji, Joseph F.; Pursifull, Ross Dykstra; Zhang, Hao, Adaptive learning of duty cycle for a high pressure fuel pump.
Serra, Gabriele; De Cesare, Matteo, Control method for a direct injection system of the common-rail type provided with a shut-off valve for controlling the flow rate of a high-pressure.
Langenbach, Christian; Kristen, Marcus, Method for supplying a high-pressure pump in a fuel injection system of an internal combustion engine with fuel and fuel injection system.
Zhang, Hao; Surnilla, Gopichandra; Meinhart, Mark; Pursifull, Ross Dykstra; Basmaji, Joseph F., Methods for correcting spill valve timing error of a high pressure pump.
Pursifull, Ross Dykstra; Surnilla, Gopichandra; Zhang, Hao; Meinhart, Mark; Basmaji, Joseph F., Methods for determining fuel bulk modulus in a high-pressure pump.
Worthington, Joseph A.; Blizard, Norman C.; Genter, David P.; Franks, Gregory S.; Mattern, Michael F.; Hahn, Thomas O.; Walls, James L.; Linen, Edward N., Variable flow fuel transfer pump system and method.
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