Air-fuel ratio controller for engine

Details Air-fuel ratio controller for engine Air-fuel ratio controller for engine

1992-07-15

1993-12-21

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4114

Patent

active

052713741

ABSTRACT:
The first mixing ratio error in a transient state is sampled as a pre-transient error, the last mixing ratio error in the transient state is sampled as a post-transient error, and the peak value of the mixing ratio errors in the transient state is also sampled. The difference between either this pre-transient mixing ratio error or post-transient mixing ratio error depending on whichever is the nearer to a peak value, and the peak value of said mixing ratio errors, is computed. Injection fuel correction amounts in transient running states are learned and the learned values are stored in a memory so as to eliminate this difference. By correcting the injection fuel amounts based on these learned values in transient running states, the effect of steady state errors on the transient learning precision is eliminated and instantaneous lean peaks in the air-fuel ratio are smoothed out.

REFERENCES:
patent: 4907558 (1990-03-01), Manaka et al.

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