Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-02-12
1988-08-16
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123480, 123440, F02M 1700
Patent
active
047636297
ABSTRACT:
An air-fuel ratio control system for an engine in which a fuel injection amount is calculated according to the engine operating conditions and is corrected according to the output of an air-fuel ratio sensor, comprises a base fuel injection amount calculating section for calculating a base fuel injection amount corresponding to the stoichiometric air-fuel ratio on the basis of the intake air amount, a target air-fuel ratio calculating section for calculating a target air-fuel ratio according to the engine operating condition, a reference value calculating section for calculating a reference value which represents the target air-fuel ratio and is submitted to comparison with the output of the air-fuel ratio sensor, a feedback correction coefficient calculating section for calculating a feedback coefficient according to the deviation of the output of the air-fuel ratio sensor from the reference value, and a final fuel injection amount calculating section which corrects the base fuel-injection amount on the basis of the ratio of the stoichiometric air-fuel ratio to the target air-fuel ratio and the feedback coefficient to obtain a final fuel injection amount.
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U.S. Patent Application Serial Nos. 772,440; 781,998; 813,933; 846,946 and 904,622 (Assignee: Mazda Motor Coporation).
Mamiya Kiyotaka
Nakazumi Tadataka
Okazaki Katsumi
Watanabe Tomomi
Yokooku Katsuhiko
Ferguson Jr. Gerald J.
Mazda Motor Corporation
Nelli Raymond A.
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