Control system for an internal combustion engine

摘要

A control system for an internal combustion engine wherein the torque developed by an internal combustion engine is detected to provide optimum control of the ignition timing of the engine and thereby to ensure an improved engine efficiency as well as an improved fuel economy. The system comprises an engine torque detector for detecting the torque developed by the engine, a signal generator for generating signals used to periodically change the ignition timing of the engine, a phase discriminator for discriminating the phase relation between the output signals of the engine torque detector and the periodic change signal generator, and ignition timing control means for controlling the ignition timing in response to the output of the phase discriminator.