Fuel pressure control system for internal combustion engine

Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...

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123179L, 123464, 123463, F02M 3900

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active

046356037

ABSTRACT:
A fuel pressure control system has a fuel pressure regulator having a reference chamber and a fuel chamber separated by a diaphragm which opens and close a fuel return passage in accordance with a pressure difference between both chambers. There are provided an accumulator for containing an air pressurized by a supercharger, and a temperature sensor for sensing a temperature of the fuel. A control unit normally puts a three-way electromagnetic fuel pressure control valve in a first position to introduce an intake manifold vacuum into the reference chamber. When the temperature sensed by the temperature sensor is higher than a predetermined value, the control unit puts the valve in a second position to introduce a high pressure air in the accumulator into the reference chamber to prevent vapor lock by increasing the fuel pressure.

REFERENCES:
patent: 2749898 (1956-06-01), Isley
patent: 4404944 (1983-09-01), Yamazaki
patent: 4438748 (1984-03-01), Ikeura
patent: 4446940 (1984-05-01), Sakakibara
patent: 4513725 (1985-04-01), Minami
patent: 4519355 (1985-05-01), Fujimura

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