The role of car knock sensor

In order to prevent the engine from further knocking, so there is our protagonist today-the car knock sensor. But there are still some friends who don't know it very deeply, and they haven't even heard of the name. So, what exactly is the role of the car knock sensor? Next, let's give you some popular science.

The car knock sensor is actually a device used to detect engine knock. When the engine knocks (produces jitter), the knock sensor converts the mechanical vibration of the engine into a signal voltage, and feeds it back to the car's on-board computer (ECU). At this time, the ECU will adjust the ignition timing in time based on the pre-stored ignition and feedback data, thereby reducing the possibility of deflagration of the car.

Don't underestimate the existence of the car's knock sensor. Once it fails, it will naturally not be able to detect engine knock. Even if the engine has knocked, the ECU cannot adjust the ignition timing in time to prevent further knocking. The impact on the engine is extremely large. Of course, as technology continues to develop,modernWhen designing automobile engine ECU, such a situation has been considered. Therefore, once the signal from the knock sensor cannot be detected for a long time, the protection program will be automatically turned on to avoid knocking, and a fault light will be lit to remind the car owner.