초록 ▼

A high pressure fuel injection system for an internal combustion engine having a high pressure pump for delivering fuel to a fuel injector. The pressure output of the pump is sensed and is controlled to provide appropriate fuel pressure to the fuel injector for the given running condition. In additi

A high pressure fuel injection system for an internal combustion engine having a high pressure pump for delivering fuel to a fuel injector. The pressure output of the pump is sensed and is controlled to provide appropriate fuel pressure to the fuel injector for the given running condition. In addition, a release passage is formed that intersects the high pressure pump at a point intermediate the ends of its stroke and which is controlled by a control valve for releasing pressure to further provide pressure control. Even if fully opened due to failure, the release valve will not preclude the generation of pressure sufficient to run the engine.

대표청구항 ▼

1. A fuel pressure control system for an internal combustion engine comprising a fuel injector, a high pressure fuel injection pump contained within a housing assembly, a pressure chamber formed within said housing assembly and communicating with the discharge of said high pressure pump through a pu

1. A fuel pressure control system for an internal combustion engine comprising a fuel injector, a high pressure fuel injection pump contained within a housing assembly, a pressure chamber formed within said housing assembly and communicating with the discharge of said high pressure pump through a pump outlet in which a delivery valve is positioned, conduit means interconnecting said pressure chamber with said fuel injector for delivering fuel thereto, means for sensing the pressure in said pressure chamber downstream of said delivery valve and means in said housing assembly for reducing the pressure in said pressure chamber in response to engine running conditions for providing the desired amount of fuel discharge by said fuel injector.