Knock Sensor

The Knock Sensor senses knock/irregular vibrations and sends information to the electronic engine management control unit. The job of the knock sensor is to prevent that uncontrolled combustion. This influences the process control in the engine like timing and fuel injection until the knock is eliminated.

Engine knock can be caused by using lower octane gas than is recommended by the manufacturer. Even an over advanced ignition timing can cause engine knock. It can also be caused by a "hot spot" in the combustion chamber.

Functions of Knock Sensor

• Knock Sensor monitors engine operation to optimize performance.
• knock Sensor protects the engine against power-robbing and engine knock.
• Engine Knock Sensor detects knock/irregular vibrations and sends information to the electronic engine management control unit.

Characteristics of Knock Sensor

• The knock sensor is designed to sense when fuel is burning unevenly which cause "knocking" or irregular vibrations in the engine.
• The knock sensor consists of an electric coil that is wound around two ceramic rods with a magnet in the center.