Fuel injection pump with an injection timing control device

Details Fuel injection pump with an injection timing control device Fuel injection pump with an injection timing control device

1981-03-30

1983-01-18

Schwartz, Larry I.

Internal-combustion engines

Charge forming device

With fuel pump

F02M 5920

Patent

active

043687091

ABSTRACT:
A distributor type fuel injection pump is disclosed for use with a diesel engine for successively supplying pressurized fuel to engine injectors in synchronism with engine rotation. The fuel injection pump includes an angularly movable control member adapted to determine the timing of fuel injection in accordance with its angular position. An injection timing control device is provided which comprises a casing, a piston drivingly connected to the control member and located for reciprocation within the casing to form two chambers at the respective ends thereof. The piston if formed therein with pressure passages communicating a pressure source with the pressure chambers, respectively. Control circuit means is provided which calculates an optimum injection timing value from various engine operating parameters and provides a control signal indicative of the calculated injection timing value. The control signal is applied to valve means which thereby varies the ratio between the effective areas of the pressure passages to create a pressure difference across the piston, whereby the piston moves to move the control member to an angular position corresponding to the calculated injection timing value.

REFERENCES:
patent: 4143632 (1979-03-01), Kobayashi
patent: 4271806 (1981-06-01), Kaibara et al.
patent: 4273088 (1981-06-01), Hofmann et al.
patent: 4292940 (1981-10-01), Bailey

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