Engine air-fuel ratio controller

Details Engine air-fuel ratio controller Engine air-fuel ratio controller

1998-01-16

2000-09-12

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

701109, F02D 4114

Patent

active

061162272

ABSTRACT:
A learning value of a multiplication term for correcting a basic injection amount and a learning value of an addition term for correcting the basic injection amount are stored in a memory. The learning value of the addition term is converted to a proportion relative to the basic injection amount, and these learning values are modified such that the sum of the proportion and the multiplication term lies within a predetermined range. The proportion of the total learning values relative to the basic injection amount is thereby suppressed to a constant level so that the effect of incorrect learning on air-fuel ratio control is also suppressed.

REFERENCES:
patent: 4785784 (1988-11-01), Nanyoshi et al.
patent: 5425349 (1995-06-01), Nagaishi et al.
patent: 5483945 (1996-01-01), Kobayashi et al.
patent: 5505184 (1996-04-01), Uchikawa

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