SPARK-IGNITION INTERNAL COMBUSTION ENGINE CONTROLLER

摘要

PROBLEM TO BE SOLVED: To detect and suppress the occurrence of preignition without detecting a cylinder pressure.SOLUTION: In Step S101, it is determined whether a cylinder lower than the other cylinders in an exhaust gas temperature in the same cycle by a set amountΔTex or more is present. If a determination result of Step S101 is YES, it is determined that preignition occurs in Step S103. In subsequent cycles, a preignition avoidance control is executed over at least the cylinder for which it is determined that the preignition occurs.