| 摘要 |
<p>A system for determining the direction of rotation of the crankshaft (14) includes a sensor assembly (10) for generating a crank rotation direction signal. The sensor assembly includes a stator (30) having a sprocket fixed to the crank and having a plurality of teeth (26). The rotation of the sprocket with the crank, results in changes in the magnetic field which create a current. The rotor includes at one angular location a first interruption that serves as a first reference point (50). The interruption in the sprocket teeth creates an irregularity in the magnetic flux and in the signal. The rotor also includes a second interruption (54) at an angle other than 180° from the first interruption. The second interruption differs physically from the first interruption so that a second irregularity which is distinguishable from the first irregularity occurs in the generated signal.</p> |
