Hot start open nozzle fuel injection systems

Details Hot start open nozzle fuel injection systems Hot start open nozzle fuel injection systems

1991-06-21

1992-11-03

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Fuel injection system

123456, F02M 5500

Patent

active

051599112

ABSTRACT:
A fuel leakage prevention system for preventing undesired leakage of fuel into the combustion chambers of an internal combustion engine equipped with a pressure/time, cam actuated unit fuel injection system. The system includes a main housing containing an evacuatable chamber adapted to be connected by a first fluid conduit to a source of sub-atmospheric pressure by a check valve and manual shut off valve. The evacuatable chamber is also adapted to be fluidically connected to a common rail supplying fuel to the injectors by a solenoid controlled valve which is open during engine shutdown and closed during engine operation whereby fuel is withdrawn from the injectors by the vacuum upon engine shutdown.

REFERENCES:
patent: 3490425 (1970-01-01), Bassot et al.
patent: 4064855 (1977-12-01), Johnson
patent: 4380976 (1983-04-01), Bottiglieri
patent: 4485789 (1984-12-01), Walter et al.
patent: 4532895 (1985-08-01), Kueny
patent: 4782808 (1988-11-01), Bostick et al.
patent: 4811711 (1989-03-01), Stumpp et al.
patent: 4911127 (1990-03-01), Perr

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