A knock sensor is a device used in internal combustion engines to detect the presence of knocking, which is an abnormal combustion event that can damage the engine. The sensor is typically mounted on the engine block and uses a piezoelectric element to convert the mechanical vibrations of the engine into an electrical signal. The signal is then sent to the engine’s electronic control unit (ECU), which adjusts the engine’s timing and fuel mixture to reduce or eliminate knocking.
Knock sensors are an important part of modern engine management systems, as they help to protect the engine from damage and improve performance. Knocking can occur when the air-fuel mixture in the engine is too lean, the ignition timing is too advanced, or the engine is under heavy load. By detecting knocking and adjusting the engine’s timing and fuel mixture, knock sensors help to prevent engine damage and improve fuel economy.
