A knock sensor is a tool utilized in inner combustion engines to detect the presence of knocking, which is an irregular combustion occasion that may harm the engine. Knocking happens when the air-fuel combination within the cylinder ignites prematurely, inflicting a speedy enhance in stress that may harm the engine’s pistons, valves, and bearings.
Knock sensors are sometimes mounted on the engine block or cylinder head, and so they use a piezoelectric crystal to detect the vibrations attributable to knocking. When knocking is detected, the knock sensor sends a sign to the engine’s digital management unit (ECU), which then adjusts the engine’s timing or gas combination to scale back or eradicate knocking.
