| 摘要 |
PROBLEM TO BE SOLVED: To carry out back-up control, at the time when a crank angle sensor fails. SOLUTION: This cylinder discrimination device of an engine is constituted to discriminate cylinders except for a specific cylinder by outputting cylinder discrimination signals Phase 1, Phase 2 for each of crank angle positions set with unequal intervals from two cam sensors, computing a cycle between inputs of the signals for each of the inputs of all these cylinder discrimination signals Phase 1, Phase 2, discriminating specific cylinders (#1 or #4) in accordance with discrimination of the Phase 1, the Phase 2 on the cylinder discrimination signals output this time and depending upon these judgement results and the total output of the cylinder discrimination signals thereafter. Consequently, it is possible to carry out cylinder discrimination only by the signals from the cam sensors.
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