Fuel supply control method for internal combustion engines

Details Fuel supply control method for internal combustion engines Fuel supply control method for internal combustion engines

1988-09-30

1989-11-28

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123478, 123492, F02M 6900

Patent

active

048830399

ABSTRACT:
A fuel supply control method for a multicylinder internal combustion engine equipped with a fuel supply control system including a main fuel injection valve disposed in the intake passage upstream of the throttle valve, and an auxiliary fuel injection valve disposed in the intake passage downstream of the throttle valve and upstream of the intake manifold, for controlling the fuel supply control system according to operating conditions of the engine. Fuel is supplied by the main fuel injection valve when the engine temperature is lower than a predetermined value, fuel is supplied by the auxiliary fuel injection valve when the engine temperature is higher than the predetermined value and the degree of opening of the throttle valve is smaller than a predetermined value, the fuel pressure applied to both the main fuel injection valve and the auxiliary fuel injection valve is regulated according to a predetermined parameter representing operating conditions of the engine, namely, pressure within the intake passage at a location downstream of the throttle valve, and the predetermined parameter is applied also to controlling the respective basic fuel injection periods of the main fuel injection valve and the auxiliary fuel injection valve.

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