| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the structure of an engine rotation angle detector simple and reduce costs.SOLUTION: The present invention relates to an engine rotation angle detector comprising: a flywheel attached to a crankshaft; a ring gear arranged on an outer circumference of the flywheel; a detection target part arranged in the ring gear; and a magnetic sensor detecting the detection target part, a tooth-missing part being formed as the detection target part in gear teeth of the ring gear by notching part of the ring gear in an axial direction, and a detection unit of the magnetic sensor being arranged at a position opposed to the tooth-missing part in the axial direction of the ring gear.</p> |
