What is the principle of the eccentric shaft sensor?
2 Answers
The principle of the eccentric shaft sensor is based on the magnetoresistive effect. The eccentric shaft sensor is equipped with two independent angle sensors with opposite characteristics. When the nearby magnetic field changes position, the ferromagnetic conductor changes its own resistance. Relevant information about the eccentric shaft sensor is as follows: 1. Introduction: The 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 in each operating state (the intake valve lift can be adjusted steplessly). 2. Measurement range: The measurement range of the sensor is 180°. The sensor is supplied with 5V voltage by the engine control unit DME. Data from the eccentric shaft sensor to the DME is transmitted at a medium clock frequency of 250kHz.
The eccentric shaft sensor is actually quite simple, it's like the 'traffic cop' in a car. Its main job is to monitor the rotation angle of the eccentric shaft in the engine. When this shaft rotates, the sensor detects changes in the position of the magnet inside. The principle is similar to the interference you get when you bring a magnet close to a phone screen. This change is converted into an electrical signal, telling the computer how much the valve is currently open. What I admire most is its ability to provide precise readings even at high engine speeds, with errors smaller than a strand of hair. This thing has a huge impact on fuel consumption and power. Last time my car had sluggish acceleration, it was because of a problem with this sensor.
