Patent ID: 8185295

Claim:
A multi-cylinder engine capable of performing a selected cylinder operation in which combustion is stopped in some cylinders, the multi-cylinder engine comprising: an ignition-timing adjustment section configured such that, when the engine is in a second state in which the number of operating cylinders is smaller than that in a first state, the ignition-timing adjustment section retards ignition timing of each operating cylinder from that in the first state; and a fuel injection adjustment section which receives a fuel injection amount increase correction value for increasing an amount of fuel injected into each operating cylinder in order to compensate a drop in engine output due to the retarded ignition timing; wherein the ignition-timing adjustment section controls the ignition timing such that, when the number of operating cylinders is smaller than a state, the amount of ignition timing retard is greater than the state, under the condition that an amount of intake air per cylinder and an amount of fuel per cylinder are the same.