IDLE QUALITY BY TORQUE SMOOTHING

摘要

An idle speed control system for an engine includes an engine speed module that generates an engine speed signal. A piston reciprocation module determines reciprocation periods of each piston of cylinders of the engine based on the engine speed signal. A difference module determines a period difference between each of the reciprocation periods and an idle period associated with a target idle speed. A spark timing module regulates an idle speed of the engine including adjustment of spark timing for each of the cylinders individually based on period differences.