Engine fuel injection controller

Details Engine fuel injection controller Engine fuel injection controller

1998-07-17

1999-12-21

Kwon, John

Internal-combustion engines

Engine speed regulator

Idle speed control

12333916, F02M 300

Patent

active

060034912

ABSTRACT:
A basic fuel injection amount is calculated based on the intake air amount detected by an air flow meter, and the basic fuel injection amount is corrected based on a phase delay of an intake air amount variation between the engine and air flow meter so as to calculate a first correction injection amount. The first correction injection amount is corrected to a second correction injection amount based on an increase amount which is different according to whether or not the engine is in the idle running state. A fuel injector performs fuel injection based on this second correction injection amount. The increase amount is determined by multiplying a difference between the first correction injection amount and basic fuel injection amount, by a predetermined gain. Due to this, a shift of the air-fuel ratio to the lean side when a new load such as an air conditioner is exerted on the engine in the idle running state, is suppressed.

REFERENCES:
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4444168 (1984-04-01), Matsumura et al.
patent: 4475504 (1984-10-01), Mizuno
patent: 5081973 (1992-01-01), Minamitani
patent: 5121725 (1992-06-01), Araki
patent: 5875757 (1999-03-01), Mizuno
patent: 5878711 (1999-03-01), Kamura et al.

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