Air-fuel ration control system for internal combustion engines

Details Air-fuel ration control system for internal combustion engines Air-fuel ration control system for internal combustion engines

1994-09-27

1996-01-16

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02M 5100

Patent

active

054839386

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine controls an amount of fuel supplied to the engine. Operating conditions of the engine, including engine rotational speed and intake pressure, are detected. Also detected is a valve opening of a recirculation control valve arranged in an exhaust recirculation passage, for controlling recirculation of exhaust gases. An amount of recirculation gas is determined based on a detected value of the valve opening of the recirculation control valve. A fuel supply amount is calculated based on the engine rotational speed and the intake pressure. The fuel supply amount is corrected based on the amount of recirculation gas determined.

REFERENCES:
patent: 4388906 (1983-06-01), Sugiyama et al.
patent: 4454847 (1984-06-01), Isomura et al.
patent: 4667640 (1987-05-01), Sekozawa et al.
patent: 4903668 (1990-02-01), Ohata
patent: 4919094 (1990-04-01), Manaka et al.

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