Apparatus for controlling the ignition timing of an internal combustion engine

摘要

An apparatus for controlling the vacuum ignition timing of an internal combustion engine provided with an exhaust gas recirculation system is disclosed. The apparatus comprises a vacuum advancer having at least one diaphragm therein which forms a chamber on a side of the diaphragm. The chamber is connected to a port in the carburetor for controlling the vacuum ignition timing of the engine by the carburetor vacuum during the exhaust gas recirculation operation. The apparatus further comprises means for preventing the ignition timing from being too advanced when the engine is operating at a high rotational speed. As a result, the required ignition timing during such operation is obtained.