![]() This means it produces a square wave and can detect metal in front of the sensor, even when that metal isn’t moving. The main difference between a Hall Effect sensor and a variable reluctance sensor is that a Hall Effect sensor is digital, where the VR sensor is analog. Hall Effect SensorĪ Hall Effect sensor (sometimes called a Hall sensor) is also magnetic. ![]() These sensors produce a sine wave signal as the metal approaches the coil, then moves away. Variable reluctance sensors output a voltage when a ferrous metal on a toothed trigger wheel passes by the sensor, creating a current on the coil of wire inside the sensor. They use a magnet with a coil of wire wrapped around it. Variable Reluctance sensors, also called variable reluctor, VR, or magnetic sensors, are similar to pickups you might find in an electric guitar or bass. Without contact between moving parts, these sensors usually have a long life, because they are not subjected to wear. These sensors typically use an electromagnetic or optical sensor that does not require contact between moving parts. There are several common types of crankshaft position sensors. If this process isn’t synchronized perfectly, the engine will run poorly, if it runs at all.ĭepending on the engine implementation, your car may have a separate sensor for the crankshaft position and camshaft position, or just one sensor to perform both jobs. The ECU needs to know precisely when to inject fuel, open the valves, and ignite the air fuel mixture for optimal combustion. The timing of the engine is critical for proper combustion. ![]() ![]() There are many different types of engine speed sensors, but they all achieve the same goal: letting the ECU know where the crankshaft and camshaft(s) are at all times.Īn engine speed sensor may also be referred to as the crankshaft position sensor, the camshaft position sensor, the crankshaft/camshaft angle sensor (CAS), or the engine position sensor. ![]()
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February 2023
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