A control device for a positive ignition engine

When a catalyst warm-up operation matter (PM) is reduced as a toxic substance in the exhaust gas immediately after starting an engine even when a change in the environment or a time-related change, and the time necessary for warming up the exhaust gas temperature is raised, while a deterioration of fuel consumption is reduced to a minimum , According to the present invention performs to solve the above problem, a motor control device having a particulate matter detection means for detecting particulate matter in exhaust gas and an exhaust gas temperature detecting means for detecting the temperature of the exhaust gas, fuel injection and ignition in the engine based on the concentration of fine dust, which is detected by the particulate matter detection means, and the exhaust gas temperature by which is detected by the exhaust temperature detecting means. It is possible to reduce the particulate matter and to raise the exhaust gas temperature, while the deterioration of the fuel consumption is reduced to a minimum.