Method for controlling the fuel supply of an internal combustion

Details Method for controlling the fuel supply of an internal combustion Method for controlling the fuel supply of an internal combustion

1985-05-22

1987-02-17

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123493, 36443105, F02M 5100

Patent

active

046431527

ABSTRACT:
A method for controlling the fuel supply of an internal combustion engine having a throttle valve in the intake air system is provided. It is detected that the crankshaft of the engine is at a predetermined crankshaft angular position. At every detection of this crankshaft position, the pressure in the intake air passage downstream of the throttle valve is detected. The present reference value P.sub.BAVEn having predetermined functional relations regarding the present detection value P.sub.BAn of the pressure in the intake air passage and the preceding reference value P.sub.BAVE(n-1) is set. The amount of the fuel supply into the engine is determined on the basis of this present reference value P.sub.BAVEn. The presumptive value of the intake air absolute pressure is calculated in consideration of the correction values with respect to the time lag in control operation and to the fuel deposition on the wall surface in the intake air manifold. Therefore, the proper reference fuel supply amount into the engine can be accurately determined, so that a driveability is improved.

REFERENCES:
patent: 4424568 (1984-01-01), Nishimura et al.
patent: 4440119 (1984-04-01), Kobayashi et al.
patent: 4508086 (1985-04-01), Ito et al.
patent: 4548180 (1985-10-01), Yamato

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