Air-fuel ratio control device for internal combustion engine

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

1997-05-05

1999-07-06

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

059185830

ABSTRACT:
An air-fuel ratio control device for an internal combustion engine of a vehicle is disclosed. The device controls the air-fuel ratio with a target value which is larger than the stoichiometric air-fuel ratio, as a control center, in an idle condition. The target value is changed to become small when an amount of intake air in an idle condition is larger than a predetermined value.

REFERENCES:
patent: 5253630 (1993-10-01), Akazaki et al.
patent: 5575266 (1996-11-01), Iida
patent: 5606959 (1997-03-01), Maki et al.
patent: 5611319 (1997-03-01), Machida

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