Knock Sensor

A knock sensor, also known as a detonation sensor, is a device used in internal combustion engines to detect abnormal combustion, known as knocking or detonation. The sensor is typically mounted on the engine block or cylinder head and is in contact with the engine's metal surfaces.

When the engine runs, the knock sensor listens for the specific vibrations and sounds associated with detonation. If it detects unusual knocking or pinging noises, which can indicate pre-ignition or excessive pressure within the combustion chamber, it sends signals to the engine control unit (ECU). In response, the ECU may adjust the ignition timing or fuel injection to prevent further knocking and potential engine damage.

The knock sensor helps optimise engine performance, improve fuel efficiency, and protect the engine from harmful detonation. Modern engines often rely on advanced sensor technology to fine-tune various parameters for efficient and safe operation.