Internal-combustion engines – Charge forming device – With fuel pump
Patent
1997-07-03
2000-01-25
Miller, Carl S.
Internal-combustion engines
Charge forming device
With fuel pump
123458, F02M 3704
Patent
active
060167904
ABSTRACT:
A high-pressure pump for use in a fuel injection system for diesel engines is provided which includes a plunger slidably disposed within a chamber formed in a pump housing to define a pressure chamber whose volume is changed according to sliding movement of the plunger, a check valve disposed within a fluid inlet line extending from an inlet port to the pressure chamber, and a solenoid valve disposed within the fluid inlet line upstream of the check valve. The check valve establishes fluid communication between the inlet port and the pressure chamber during a fluid suction operation wherein the fluid is sucked into the pressure chamber, while blocking the fluid communication between the inlet port and the pressure chamber during a fluid feeding operation wherein the fluid sucked into the pressure chamber is pressurized and discharged from an outlet port. The solenoid valve controls a flow rate of the fluid sucked into the pressure chamber through the check valve. 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.
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patent: 5273017 (1993-12-01), Braun
Enomoto Shigeiku
Makino Tadaaki
Miller Carl S.
Nippon Soken Inc.
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