JPS6424168A - Ignition timing control device for internal combustion engine - Google Patents

Abstract

PURPOSE:To make the reduction in acceleration shock and the improvement in acceleration feeling compatible by carrying out the ignition timing control at the time of accleration in an intermediate gear position, and at the time of accleration in the first-speed side or the high-speed side gear position, by stopping the ignition timing control or reducing the correction quantities. CONSTITUTION:The operating condition of an engine is detected by a means A, and further on the basis of the detected engine operating condition, the basic ignition timing is determined by a means 8. In addition, on the basis of the variation in the opening of a throttle valve, acceleration is judged by a means C, and further the time elapsed from the point when the start of acceleration has been detected is measured by a means D. On the other hand, the ignition timing is corrected by a first means E to the lag side until a first prescribed time elapses, and further the ignition timing is corrected by a second means F in such a direction as the variation in the engine speed is restrained until a second prescribed time elapses. And when the gear position detected by a means G before acceleration is in the first-speed side or the high-speed side gear position, respective correction quantities are reduced by a means H, or respective corrections are stopped.