What causes the signal of the Magotan knock sensor 1 to be too small?
1 Answers
Knock sensor signal being too small is a normal phenomenon. The knock sensor signal generally does not display, and changes only occur when the throttle is accelerated abruptly. You can observe the data stream; tapping the sensor with a screwdriver will cause a noticeable change in the data stream, indicating that the sensor is functioning properly. The function and principle of the knock sensor: 1. The knock sensor is an AC signal generator: but they are quite different from most other automotive AC signal generators. Besides detecting the speed and position of the rotating shaft like the magnetic crankshaft and camshaft position sensors, they also detect vibration or mechanical pressure. 2. Early ignition, poor exhaust gas recirculation: Engine knocking caused by factors such as low-grade fuel can lead to engine damage. The knock sensor sends a knock signal to the computer, sometimes via the control module PCM, allowing the computer to readjust the ignition timing to prevent further knocking. They essentially act as the "oxygen sensor" in the ignition timing feedback control loop. 3. The knock sensor is placed at different locations on the engine block or cylinder: When vibration or knocking occurs, it generates a small voltage peak; the greater the knocking or vibration, the larger the voltage peak produced by the knock sensor.
