| 摘要 |
A reverse rotation detection apparatus which comprises a rotor having a plurality of portions to be detected for rotating in association with a crankshaft of an internal combustion engine, and a pickup for detecting a front end position and a rear end position of each of the plurality of portions, sequentially detects a first period, which is an interval from a detected time of the front end position to a detected time of the rear end position, and a second period, which is an interval from the detection time of the rear end position to the detection time of the front end position, in accordance with a pulse signal output by the pickup, and generates a reverse rotation detection signal based on detected values of the first and second periods. |
