| 摘要 |
An auxiliary revolution sensor (16) is disposed for detecting a reference position signal (16a) of each cylinders. A computer (3) outputs an auxiliary reference cylinder signal (3d) by the reference position signal (16a). A pseudo reference position signal generator (12,13,14,15) produces a pseudo reference position signal (15a) by the auxiliary reference cylinder signal (3d). An electronic distributor (5) outputs ignition signals (6) to ignitors (6-11) by outputting signals of the pseudo reference position signal generator and the computer, when a revolution sensor (1) is out of order.
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