What is the function of an eccentric shaft sensor?
2 Answers
The specific functions of an automotive eccentric shaft sensor are as follows: 1. The engine eccentric shaft sensor detects the position of the eccentric shaft when equipped with an electronic valve control system. The eccentric shaft adjusts the camshaft to achieve the optimal intake valve lift under various operating conditions. The eccentric shaft is adjusted by the electronic valve control servo motor. 2. The eccentric shaft sensor is equipped with two independent angle sensors with opposite characteristic curves. The eccentric shaft sensor operates based on the magnetoresistive effect principle, where a ferromagnetic conductor changes its resistance under the influence of a magnetic field. This sensor features a redundant design structure, with two sensor elements housed in a single unit. One sensor serves as the primary unit, while the other acts as a reference sensor for monitoring purposes.
The eccentric shaft sensor, also known as the camshaft position sensor, is something I often encounter in the repair shop. It primarily informs the engine control unit about the rotational position and speed of the camshaft, coordinating the timing of fuel injection and ignition. Like a conductor, it ensures each cylinder burns fuel at the correct time, preventing engine shaking or stalling. If it fails, the vehicle may have difficulty starting, unstable idling, or even stall midway, which can be quite alarming. Regular cleaning of the sensor from dust is crucial, as buildup of oil or metal shavings can lead to inaccurate readings. In fact, it works in tandem with the crankshaft sensor, providing data to the computer to enhance fuel efficiency and emission control. Don’t underestimate this small component—replacing it during repairs can immediately make the engine much quieter.
