Cummins Engine Company, Inc.

Bai Mao Yen

Lester L Peters

Julius P Perr

George L Muntean

Yul J Tarr

Laszlo D Tikk

Harry L Wilson

Mustahsen Gull

Daniel G Burns

Ivar L Johnson

Fuel metering check valve arrangement for a time-pressure controlled

A fuel injector for periodically injecting fuel pulses of a variable quantity on a cycle to cycle basis as a function of the pressure of fuel supplied to the injector from a source of fuel and at a constant time during each cycle is set forth including an injector body containing a central bore and an injection orifice at the lower end of the body and a reciprocating plunger assembly including an upper plunger section and a lower plunger section serially mounted within the central bore to define a variable volume metering chamber located between the lower plunger section and the lower end of the injector body containing the injection orifice. The variable volume metering chamber communicates during a portion of each injector cycle with the source of fuel. A variable volume timing chamber is located between the upper and lower plunger sections, and the timing chamber communicates for a portion of each injector cycle with the source of timing fluid and os isolated from the source of timing fluid at a constant time during each cycle.

Unit fuel injector having constant start of injection

A fuel distributor is provided which is capable of distributing fuel through plural fuel injection lines to the corresponding cylinders of a multicylinder internal combustion engine and which includes a distributor housing including a supply inlet passage, a plurality of fuel injection outlet passages and a plurality of distributor valves for providing sequential periodic fluidic communication between the supply inlet passage and the outlet passages. Each distributor valve, which may be cam-actuated or solenoid-actuated, is adapted to be placed in an open position to define a fuel injection period during which high pressure fuel may flow through the distributor valve to the respective engine cylinder and a closed position blocking fuel flow through the respective fuel injection outlet passage. Each of the distributor valves is adapted to receive a force from the high pressure fuel flowing from the supply inlet passage which urges the distributor valve into the closed position thereby providing an effective seal and minimizing leakage. The distributor may be used in a high pressure fuel system having a control valve positioned between a high pressure accumulator and the fuel distributor for controlling the flow of high pressure fuel to the distributor. The control valve is moveable to define a fuel injection event, occurring within the injection period provided by each distributor valve, during which high pressure fuel may flow from the high pressure supply means through one of the distributor valves to a respective engine cylinder.

Distributor for a high pressure fuel system

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Columbus, IN, United States of America

Bai Mao Yen