| 摘要 |
<p>[Problem] To securely perform determinations of strokes of an engine. [Solving Means] A control apparatus for an engine measures a maximum pressure P2 and a minimum pressure P1 in an intake pipe during one revolution of a crankshaft and calculates a difference between the maximum pressure P2 and the minimum pressure P1 as an intake-air-pressure fluctuation range DPMTDC. The control apparatus compares, with respect to a magnitude relation, a previous intake-air-pressure fluctuation range with a current intake-air-pressure fluctuation range. When variations in the magnitude relation between the intake-air-pressure fluctuation ranges DPMTDC occur three consecutive times, the control apparatus makes a stroke determination, and determines that the engine is in expansion and exhaust strokes when a variation in the intake-air-pressure fluctuation ranges DPMTDC is from large to small.</p> |
