Mazda Motor Corporation

Tomohiro Ueno

Yusuke Higuchi

A PCM () performs a catalyst early warming control (AWS control) for accelerating warm-up of a catalytic device. When the catalytic device () is not in an activated state and a vehicle is traveling, the PCM () is configured to perform: a fuel injection control to inject fuel such that a homogeneous fuel-air mixture can be formed in a combustion chamber () of an engine () so as to generate a homogeneous combustion; an intake air amount control to increase intake air amount; and an ignition control to retard ignition timing from a reference ignition timing. In addition, the PCM () is configured to vary ignition timing retard amount corresponding to a difference between the ignition timing retarded by the ignition timing control and the reference ignition timing, in accordance with engine speed and/or engine load.

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Hiroshima, Japan

Tomohiro Ueno