Tyneside Audi Audi glossary

Engine knock is characteristic of an uncontrolled combustion process and can cause engine damage. That is prevented by a knock sensor, a noise sensor near the engine. It senses knock and transmits information to the electronic engine management control unit. This influences process control in the engine, for example timing and fuel injection until knock is eliminated. Knock is frequently caused by fuel that does not comply with the required minimum quality.