Method of air/fuel ratio control for internal combustion engine

Details Method of air/fuel ratio control for internal combustion engine Method of air/fuel ratio control for internal combustion engine

1987-04-24

1988-05-03

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123493, F02M 5100

Patent

active

047413115

ABSTRACT:
A method of engine air/fuel ratio control whereby a compensation value is computed for compensating an error of a basic fuel injection time interval. The computation is periodically performed as an operating sequence including steps of computing a current first compensation value, utilizing a preceding first compensation value (obtained and memorized during a previous execution of the sequence, under the same engine operating conditions as those of the current first computation value), obtaining a second compensation value based on the deviation between a detected air/fuel ratio and a target air/fuel ratio, and compensating the basic value by the first and second compensation values to obtain an output value, used to control fuel supply to the engine. In addition, while engine acceleration or deceleration is occurring, the basic value is corrected by a transition compensation value, computed in accordance with the degree of acceleration or deceleration.

REFERENCES:
patent: 4467770 (1984-08-01), Arimura et al.
patent: 4542729 (1985-09-01), Yamato et al.
patent: 4572129 (1986-02-01), Otobe
patent: 4578172 (1986-03-01), Yamada et al.
patent: 4592325 (1986-06-01), Nakagawa
patent: 4633840 (1987-01-01), Saito et al.
patent: 4635200 (1987-01-01), Egami et al.
patent: 4637364 (1987-01-01), Abe et al.

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