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Core Function:
The Crankshaft Position Sensor is one of the most critical sensors in a modern engine. Its primary job is to monitor the rotational position and speed (RPM) of the crankshaft and send this real-time data to the Engine Control Unit (ECU).

Detailed Description:

1. What It Monitors:

Position: It tells the ECU exactly where each piston is in its cycle (Top Dead Center, etc.).

Speed: It calculates engine Revolutions Per Minute (RPM) by measuring how fast the crankshaft's trigger wheel is spinning.

2. How It Works:
The sensor is mounted close to a reluctor ring (or trigger wheel), which is a toothed ring attached to the crankshaft, flywheel, or harmonic balancer. As the crankshaft rotates, the teeth pass by the sensor tip.

Magnetic (Variable Reluctance) Type: Generates an analog alternating current (AC) voltage signal as each tooth disrupts its magnetic field. The frequency of the signal equals RPM.

Hall-Effect Type: Uses a digital on/off signal triggered by the teeth. It is more precise at low speeds and is commonly used in modern vehicles.

Crankshaft Position Sensor

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