Patent ID: 7000594

Claim:
An electronic control unit for a two-cycle internal combustion engine with an exhaust control valve, comprising: an injector for supplying fuel to the internal combustion engine with the exhaust control valve whose opening is changed to adjust exhaust timing; injection amount determination means for determining an injection amount determining variable, which determines the injection amount of fuel injected from said injector, for various control conditions; injector driving means for driving said injector so as to inject fuel of the injection amount determined by the injection amount determining variable determined by said injection amount determination means; ignition timing determination means for determining the ignition timing of said internal combustion engine for various control conditions; and ignition device driving means for driving an ignition device which ignites said internal combustion engine and performing igniting operation when the ignition timing determined by said ignition timing determination means is detected, wherein said electronic control unit further comprises valve abnormality detection means for detecting the abnormality of operation of said exhaust control valve; and said injection amount determination means is comprised so that, when said valve abnormality detection means detects the abnormality of operation of said exhaust control valve, said injection amount is increased to a value higher than the value determined by said control condition at the normal state within a range not exceeding the maximum value that said injection amount can take for said control condition at the normal state.