a little microphone that is fitted into the engine block
an acoustic sensor that listens for pre-ignition - more commonly known as knocking or pinking/pinging
a reliable piece of hardware that sits on the engine block to detect the vibrations in your BMW
A sensor that signals the engine-control computer when detonation is detected, momentarily retarding ignition timing until detonation ceases.
(KNK or KS) a piezoelectric accelerometer mounted on the engine to detect the high-frequency vibrations caused by detonation. Since an engine gives the best power and efficiency as it approaches detonation, the knock sensor can relay this information to a computer which can control the factors leading to detonation. Also called detonation sensor
Electronic device to detect vibration (i.e. knock) in the combustion chamber in a petrol engine.
A sensor mounted on the engine that is designed to detect the high-frequency vibrations caused by detonation. By employing a knock sensor, a computerized engine-control system allows an engine to operate very near its detonation limit: thereby improving power and efficiency.
A high-frequency microphone that is factory-tuned to listen for knock in an engine. Usually this signal is monitored by the ECU, usually for the purposes of advancing or retarding timing. See also: KNOCK.
An electronic listening device that senses early signs of pre-ignition (also known as pinging or knocking) inside an engine's cylinders. The computerized system then delays when the ignition spark is delivered to the cylinder to reduce the possibility of engine damage.