Method of and apparatus for controlling fuel injection quantity

Details Method of and apparatus for controlling fuel injection quantity Method of and apparatus for controlling fuel injection quantity

1986-12-29

1989-08-15

Lall, Parshotam S.

Boots, shoes, and leggings

36443105, 123492, 123493, F02M 5100

Patent

active

048581364

ABSTRACT:
A method of and apparatus for controlling a fuel injection quantity for an internal combustion engine wherein the fuel injection quantity is controlled on the basis of both an intake-pipe pressure and a rotational speed of the engine. The output of a pressure sensor for detecting the intake-pipe pressure is processed by a CR filter having a time constant which enables removal of a pulsating component of the intake-pipe pressure. The output of the CR filter is relaxed to calculate a first weighted mean value with a relatively low degree of relaxation and a second weighted mean value with a relatively high degree of relaxation. The second weighted mean value is subtracted from the first weighted mean value, and an incremental/decremental quantity is determined on the basis of the result of the subtraction. The synchronous fuel injection quantity during acceleration or deceleration is corrected by the incremental/decremental quantity, and during acceleration the fuel is injected asynchronously on the basis of the incremental/decremental quantity.

REFERENCES:
patent: 4490792 (1984-12-01), Deutsch et al.
patent: 4508086 (1985-04-01), Ito et al.
patent: 4520784 (1985-06-01), Isobe et al.
patent: 4547852 (1985-10-01), Kamifuji et al.
patent: 4643152 (1987-02-01), Yamato
patent: 4725954 (1988-02-01), Takao et al.

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