Patent ID: 7191760

Claim:
An ignition control method for a two-cycle internal combustion engine that performs detonation inhibition control for delaying an ignition timing of said internal combustion engine at occurrence of detonation in order to inhibit the occurrence of the detonation, wherein exhaust pipe temperature detection means for detecting an exhaust pipe temperature of said internal combustion engine is provided, a map is prepared that provides a relationship among a throttle valve opening degree and a rotational speed of said internal combustion engine and an allowable upper limit value of said exhaust pipe temperature, which is an upper limit value of an exhaust pipe temperature range that allows control to delay the ignition timing without abnormal increase in the exhaust pipe temperature, and while said detonation inhibition control is performed, an allowable upper limit temperature arithmetical operation step of arithmetically operating the allowable upper limit value of said exhaust pipe temperature is performed by searching said map with respect to the throttle valve opening degree and the rotational speed of said internal combustion engine, and an ignition operation of said internal combustion engine is stopped when an exhaust pipe temperature detected by said exhaust pipe temperature detection means exceeds the allowable upper limit temperature of the exhaust pipe temperature arithmetically operated in said allowable upper limit temperature arithmetical operation step.