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    • 72. 发明专利
    • DE69720603D1
    • 2003-05-15
    • DE69720603
    • 1997-07-02
    • NIPPON SOKEN
    • MAKINO TADAAKIENOMOTO SHIGEIKU
    • F02B3/06F02D41/38F02M59/06F02M59/10F02M59/36F02M59/46F02M63/02F04B9/04F04B49/22F02M59/08
    • A high-pressure pump (P) for use in a fuel injection system for diesel engines is provided which includes a plunger (21) slidably disposed within a chamber (11) formed in a pump housing (1) to define a pressure chamber (23) whose volume is changed according to sliding movement of the plunger (21), a check valve (4) disposed within a fluid inlet line extending from an inlet port (14) to the pressure chamber (23), and a solenoid valve (6) disposed within the fluid inlet line upstream of the check valve (4). The check valve (4) establishes fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid suction operation wherein the fluid is sucked into the pressure chamber (23), while blocking the fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid feeding operation wherein the fluid sucked into the pressure chamber (23) is pressurized and discharged from an outlet port (33). The solenoid valve (6) controls a flow rate of the fluid sucked into the pressure chamber (23) through the check valve (4). This pump structure is compact in size, consumes less electric power, and is capable of feeding a desired quantity of fuel into the engine accurately.
    • 73. 发明专利
    • DE69720603T2
    • 2004-03-04
    • DE69720603
    • 1997-07-02
    • NIPPON SOKEN
    • MAKINO TADAAKIENOMOTO SHIGEIKU
    • F02B3/06F02D41/38F02M59/06F02M59/10F02M59/36F02M59/46F02M63/02F04B9/04F04B49/22F02M59/08
    • A high-pressure pump (P) for use in a fuel injection system for diesel engines is provided which includes a plunger (21) slidably disposed within a chamber (11) formed in a pump housing (1) to define a pressure chamber (23) whose volume is changed according to sliding movement of the plunger (21), a check valve (4) disposed within a fluid inlet line extending from an inlet port (14) to the pressure chamber (23), and a solenoid valve (6) disposed within the fluid inlet line upstream of the check valve (4). The check valve (4) establishes fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid suction operation wherein the fluid is sucked into the pressure chamber (23), while blocking the fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid feeding operation wherein the fluid sucked into the pressure chamber (23) is pressurized and discharged from an outlet port (33). The solenoid valve (6) controls a flow rate of the fluid sucked into the pressure chamber (23) through the check valve (4). This pump structure is compact in size, consumes less electric power, and is capable of feeding a desired quantity of fuel into the engine accurately.
    • 77. 发明专利
    • DE19601577B4
    • 2007-07-12
    • DE19601577
    • 1996-01-17
    • NIPPON SOKEN
    • ENOMOTO SHIGEIKUSAKAKIBARA YASUYUKIGOTOH MORIYASUSUZUKI HUMINORI
    • F02D41/38F02B3/06F02D41/40F02M41/12
    • A target fuel injection timing of the fuel injection pump is calculated based on the operating conditions of a diesel engine (Steps 102; 302; 602), while an actual fuel injection timing is calculated based on crank angle signals (Steps 103; 303: 603). Then, a fuel injection timing error (Terr) is obtained based on a difference between the target fuel injection timing and the actual fuel injection timing (Steps 104; 304; 604). To adjust the actual fuel injection timing based on the error (Terr), a rotational position of a roller ring (10) is controlled through a timer piston (21) slidable and housed in a timer device (28) by a hydraulic pressure control valve (27) in response to a pulse actuating signal having a controllable duty ratio (DFIN). The pulse actuating signal having the controlled duty ratio is generated at a predetermined pulse output timing (Steps 208; 406; 706), so that the fuel injection caused by a force feeding stroke of the fuel injection pump is not overlapped with an actual valve-open duration of hydraulic pressure control valve (27) varying depending on the engine speed (N), thereby completely locking the timer piston (21) during the fuel injection.
    • 79. 发明专利
    • DE19602474B4
    • 2009-07-09
    • DE19602474
    • 1996-01-24
    • NIPPON SOKEN
    • ENOMOTO SHIGEIKUSAKAKIBARA YASUYUKIGOTOH MORIYASU
    • F02D1/18F02B3/06F02D1/02F02D41/14F02M37/22F02M41/12F02M59/46F16K31/06
    • An injection timing control device for a fuel injection pump includes an oil-pressure control valve for controllably changing the fuel injection timing of the fuel injection pump. The oil-pressure control valve includes a valve cylinder having a valve seat. The valve seat has a first truncated-conical surface. The oil-pressure control valve further includes a valve needle slidably received in the valve cylinder and movable by a control unit. The valve needle has a second truncated-conical surface for engaging with the first truncated-conical surface to close the oil-pressure control valve and disengaging from the first truncated-conical surface to open the oil-pressure control valve. The first and second truncated-conical surfaces, when engaged, form a circular seal line on which the first and second truncated-conical surfaces abut each other. The circular seal line has a diameter which is substantially the same as a diameter of the valve needle. In the oil-pressure control valve, a fuel pressure applied to the valve needle at one axial end thereof is introduced to an opposite axial end thereof for equalizing fuel pressures applied to the valve needle at the opposite ends thereof.
    • 80. 发明专利
    • DE69731241T2
    • 2006-03-02
    • DE69731241
    • 1997-07-02
    • NIPPON SOKEN
    • MAKINO TADAAKIENOMOTO SHIGEIKU
    • F02B3/06F02D41/38F02M59/06F02M59/08F02M59/10F02M59/36F02M59/46F02M63/02F04B9/04F04B49/22
    • A high-pressure pump (P) for use in a fuel injection system for diesel engines is provided which includes a plunger (21) slidably disposed within a chamber (11) formed in a pump housing (1) to define a pressure chamber (23) whose volume is changed according to sliding movement of the plunger (21), a check valve (4) disposed within a fluid inlet line extending from an inlet port (14) to the pressure chamber (23), and a solenoid valve (6) disposed within the fluid inlet line upstream of the check valve (4). The check valve (4) establishes fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid suction operation wherein the fluid is sucked into the pressure chamber (23), while blocking the fluid communication between the inlet port (14) and the pressure chamber (23) during a fluid feeding operation wherein the fluid sucked into the pressure chamber (23) is pressurized and discharged from an outlet port (33). The solenoid valve (6) controls a flow rate of the fluid sucked into the pressure chamber (23) through the check valve (4). This pump structure is compact in size, consumes less electric power, and is capable of feeding a desired quantity of fuel into the engine accurately.