Engine controller

An engine controller comprising:

• an exhaust gas recirculation valve provided on an exhaust gas recirculation passage in an exhaust gas recirculation device, the exhaust gas recirculation passage serving as a bypass between an exhaust passage and an intake passage of an engine;
• a fuel injection device configured to inject fuel into a cylinder of the engine;
• an ignition device configured to ignite, at predetermined ignition timing, a spark plug of the engine faced with an inside of the cylinder;
• and
• a controller configured to
• compulsively open and close the exhaust gas recirculation valve during fuel cut, to perform learning and diagnosis of the exhaust gas recirculation device,
• detect restoration from the fuel cut, and
• on an occasion of the restoration from the fuel cut, make a retard control of the ignition timing, a control of an amount of air to pass through a throttle valve, and a control of a degree of opening of the exhaust gas recirculation valve,
• the controller comprising a processor configured to calculate torque on the occasion of the restoration from the fuel cut during or after the learning and the diagnosis of the exhaust gas recirculation device,
• the processor comprising
• a requested torque setter configured to, on the occasion of the restoration from the fuel cut, set requested torque as engine torque requested by a driver,
• a surplus torque setter configured to, on the occasion of the restoration from the fuel cut, set surplus torque in combustion based on a flow rate of air to pass through the exhaust gas recirculation valve,
• a comparator configured to make a comparison between the requested torque set by the requested torque setter and the surplus torque set by the surplus torque setter, and
• a correction torque setter configured to set, based on a result of the comparison by the comparator, correction torque to correct the amount of the air to pass through the throttle valve and to make retard correction of the ignition timing.