The engine ECU detects the camshaft angle, and performs cylinder recognition based on the signals detected by the camshaft position sensor. Due to timing rotor rotation, the direction of the magnetic field magnetic vector emitted from the sensor magnet changes according to the detection tooth position during the time when the detection tooth attached to the timing rotor approaches and then moves away from the camshaft position sensor. As a result, the MRE resistance value also changes. Voltage from the engine ECU is applied to the camshaft position sensor, and the change in MRE resistance value is outputted as a change in voltage.
Information is compiled from both crankshaft and camshaft position sensors to output camshaft position adjustments performed by the variable camshaft timing actuator-phaser. A knock sensor is used to detect detonation-pinging to further input data for the computer while retarding ignition timing to compensate. A crankshaft position sensor uses a magnetic coil mounted inside a plastic housing while supplying an electrical connector to transfer data to the computer.
The computer also uses this sensor to gather misfire data due to the temporary slowdown of the crankshaft while the misfire occurs. When the starter is engaged the computer uses the crankshaft positions sensor to confirm the engine is actually cranking over.
Once this confirmation is received the computer will signal various relays such as the fuel pump relay and ignition systems that the engine ready to start. This is why the sensor is located either next to camshaft or the crankshaft itself. If we try to explain it in simpler words, the crankshaft position sensor monitors within the engine, the location of the camshaft. The information that it gathers thus, it uses the same to optimize the timing of fuel injection in the engine. In case this sensor malfunctions, the computer will be unable to make fine adjustment to fuel injection and the performance of the engine will dip.
Here are a few ways in which this sensor functions. If you look at the crankshaft, you will find a powerful magnet next to it. You will also find that there are steel pins or pegs arranged at regular intervals around the crankshaft. This magnet constantly radiates a magnetic field that is steady. As the engine starts and the crankshaft spins the steel pins around the shaft rotate around this field.
This causes fluctuation in the field, thus producing an AC alternating current signal. This further signals the engine management unit engine computer to decipher the speed of rotation.
Home - Blog - Automobile Engineering. The most important sensors of any engine, the crankshaft and camshaft position sensors are integral to the functionality of the distributor and ignition timing. The crankshaft position sensor monitors as a multifunctional sensor used to set ignition timing, detect engine RPM, precise position of the engine crankshaft and relative engine speed. This sensor negates the need for manual distributor timing.
The camshaft position sensor is used to determine which cylinder is firing to synchronize the fuel injector and coil firing sequence. In some cars, the sensor is installed close to the main pulley harmonic balancer like in this Ford in the photo. In other cars, the sensor could be installed at the transmission bell housing, or in the engine cylinder block, as in the photo below.
In the technical literature, the crankshaft position sensor is abbreviated to CKP. If you look at the crankshaft, you will find a powerful magnet next to it. You will also find that there are steel pins or pegs arranged at regular intervals around the crankshaft. This magnet constantly radiates a magnetic field that is steady. As the engine starts and the crankshaft spins the steel pins around the shaft rotate around this field.
This causes fluctuation in the field, thus producing an AC alternating current signal. This further signals the engine management unit engine computer to decipher the speed of rotation. In turn, the EMU is able to calculate the position and the pace of the camshaft to further optimize fuel injection and ignition.
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