Diesel engines are more prone to knocking than gasoline engines. This is because diesel fuel has a higher ignition temperature than gasoline, and it takes longer for the fuel to ignite. This delay can cause the fuel to accumulate in the cylinder and detonate all at once, which produces a knocking sound.
Knock sensors are used to detect knocking in diesel engines and prevent engine damage. The sensors are located on the engine block and they detect the vibrations caused by knocking. When knocking is detected, the sensor sends a signal to the engine control unit (ECU). The ECU then retards the timing of the fuel injection to reduce the knocking.
Knock sensors are an important part of diesel engines and they help to protect the engine from damage.
