Component Speed Sensors — WSU

Component Speed Sensors — WSU - Component...

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Component Speed Sensors The speed of moving components on an automobile can be monitored with a permanent magnet generator. A permanent magnet (PM) generator is comprised of the following parts: A stationary coil of wire wrapped around a permanent magnet. A permanent magnet. An external toothed reluctor wheel will rotate very close (typically 0.060") to the PM generator. As the reluctor wheel rotates, the magnetic field strength will increase and decrease with each passing tooth. The fluctuating magnetic field induces AC voltage/current into the coil of wire. The faster the rotational speed of the reluctor wheel, the higher the AC output voltage. The AC voltage/current is read by a computer and translated into a rotational speed based upon the frequency of the AC voltage signal. Examples of PM generators on an automobile are: Wheel Speed Sensors (WSS) - Wheel speed sensors used by the Anti-lock Brake System (ABS), Traction Control System (TCS), Vehicle Stability Control System (VSC), and Powertrain control module (PCM). The PCM uses the WSS signal to disable engine misfire detection when rough roads
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  • Winter '12
  • JohnKelly
  • Magnetic Field, Anti-lock braking system, Fuel injection, Electronic stability control, Input Speed Sensor, Component Speed Sensors

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Component Speed Sensors — WSU - Component...

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