Patent ID: 6968269

Claim:
An engine control device, comprising: crankshaft phase detecting means for detecting a phase of a crankshafts; intake air pressure detecting means for detecting an intake air pressure in an intake pipe of an engine; stroke detecting means for detecting a stroke of the engine based on at least the phase of the crankshaft detected by the crankshaft phase detecting means; engine control means for controlling an operating condition of the engine based on the stroke of the engine detected by the stroke detecting means and the intake air pressure detected by said intake air pressure detecting means; and engine rotational speed detecting means for detecting an engine rotational speed, wherein the stroke detecting means detects a stroke based on a variation in intake air pressure detected by the intake air pressure detecting means and detects a stroke based on a variation in the engine rotational speed detected by the engine rotational speed detecting means, and completes stroke detection when the detected strokes coincide with each other.