Air-fuel ratio control system for internal combustion engine

Details Air-fuel ratio control system for internal combustion engine Air-fuel ratio control system for internal combustion engine

1993-07-02

1996-02-20

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60285, F01N 328

Patent

active

054919754

ABSTRACT:
In an air-fuel ratio control system for an internal combustion engine, a target air-fuel ratio is set on a side opposite to a direction of deviation of a monitored upstream side air-fuel ratio in such a manner as to counterbalance or offset the deviation of the upstream side air-fuel ratio. The deviation of the upstream side air-fuel ratio may be derived in the form of an mount of a particular component adsorbed in a catalytic converter. A learned value may be used to correct the monitored upstream side air-fuel ratio. Further, a monitored downstream side air-fuel ratio may be used to monitor the setting of the target air-fuel ratio.

REFERENCES:
patent: 5090199 (1992-02-01), Ikuta
patent: 5115639 (1992-05-01), Gopp

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