CONTROL APPARATUS OF ENGINE

A control apparatus that is applied to a gasoline engine including cylinders is provided. The apparatus includes a controller for controlling the engine to perform a compression self-ignition operation within a first operating range, and perform a forced-ignition operation within a second operating range. Within a third operating range where the engine load is above the first range and below the second range, the controller executes a combined operation control in which a first cylinder performs the compression self-ignition operation and a second cylinder performs the forced-ignition operation, and the controller causes the first cylinder to generate a torque that is the same or lower than a torque before the control, and causes the second cylinder to generate a torque that is higher than a torque before the control, the first cylinder being one or some of the cylinders, the second cylinder being the rest of the cylinders.