Engine fuel injection controller

Details Engine fuel injection controller Engine fuel injection controller

1994-09-15

1996-01-23

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02M 5100

Patent

active

054858216

ABSTRACT:
A fuel delay correction under transient engine running conditions is separated into a short-term delay correction and a long-term delay correction, and the fuel injection amount is corrected by respectively applying these correction according to the engine running conditions. A basic updating amount of these corrections is computed based on the difference between an air-fuel ratio which is actually detected and a target value of the air-fuel ratio, and the basic updating amount is separated into an updating amount for the short-term delay correction and an updating amount for the long-term delay correction by an assignment factor which is based on the temperature of a part of the intake air passage to which injected fuel adheres. The respective correction amount is updated by the assigned updating amount, and stored in a memory. The fuel injection amount is thereby controlled according to the temperature of the part to which fuel adheres, and the air-fuel ratio in transient conditions is controlled to the target air-fuel ratio in a short time period.

REFERENCES:
patent: 5284116 (1994-02-01), Richeson, Jr.
patent: 5331936 (1994-07-01), Messih et al.
patent: 5367462 (1994-11-01), Klenk et al.
patent: 5390641 (1995-02-01), Yamada et al.

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