In order that the present invention can prevent the generation of blow-over phenomenon of the internal combustion engine in advance,; Detecting means for detecting the pressure value inside the crankcase of the number of revolutions and the cylinder block of the engine and; And detecting the number of revolutions of the engine from the sensing means, the rotation from the number after setting a threshold pressure value of the crank the occurrence of blow-over developable indoor, as compared to a limit pressure value and the pressure value of the internal current crankcase fuel and control means for controlling the quantity and alert the driver; And the injector is controlled and fuel injection timing for injecting into the combustion chamber under the control of the control unit operation; It provides a blow-over phenomenon occurs prevention device and method for an internal combustion engine, including; warning light that lights up the generation of blow-over phenomenon to a driver under the control of the control means operable to alert in advance.
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