Automatic internal combustion engine stop device, internal combustion engine provided with the same and automatic internal combustion engine stop method

摘要

In an automatic stop device that automatically stops the operation of an internal combustion engine (1) after a predetermined automatic stop condition is satisfied, a load acting on the engine (1) is removed when the automatic stop condition is satisfied. When the automatic stop condition is satisfied, the difference between the magnitude of the load on the internal combustion engine before and after of the automatic stop condition is satisfied is determined, and an ignition timing retard amount of an ignition plug (2) is decided such that the retard amount is increased as the difference becomes greater. The ignition timing is retarded by the retard amount substantially at the same moment as the load removing operation before the automatic stop control is initiated.