Air-fuel ratio control device for a vehicle engine

Details Air-fuel ratio control device for a vehicle engine Air-fuel ratio control device for a vehicle engine

1991-01-28

1992-03-03

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02M 5100

Patent

active

050922971

ABSTRACT:
An air-fuel ratio control device for an vehicle engine, by which the air-fuel ratio of the air-fuel mixture supplied to a vehicle engine is changed. The device sets the air-fuel ratio to a lean mixture when the engine coolant temperature is higher than a predetermined value and the vehicle speed is higher than a value determined by a time elapsed after engine startup.

REFERENCES:
patent: 4644921 (1987-02-01), Kobayashi et al.
patent: 4765301 (1988-08-01), Koike et al.
patent: 4773378 (1988-09-01), Fujimura et al.

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