Method and apparatus for controlling the air-fuel ratio of an in

Details Method and apparatus for controlling the air-fuel ratio of an in Method and apparatus for controlling the air-fuel ratio of an in

1995-02-27

1996-04-09

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

055051847

ABSTRACT:
Air-fuel ratio learning is only carried out at the time of high exhaust temperatures, and is inhibited when the exhaust temperature is less than or equal to a predetermined temperature. In the latter case, air-fuel ratio feedback correction coefficient .alpha. is correctingly set, taking a correction level indicated by an air-fuel ratio learned correction coefficient K learned at the time of high exhaust temperatures as a true correction requirement level.

REFERENCES:
patent: 5320080 (1994-06-01), Kadowaki
patent: 5341641 (1994-08-01), Nakajima et al.
patent: 5381774 (1995-01-01), Nakajima
patent: 5400762 (1995-03-01), Fodale et al.
patent: 5404718 (1995-04-01), Orzel et al.

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