31/10/2024
A knock sensor is a vital engine component that monitors vibrations and engine knock to improve fuel economy and performance. It's a piezoelectric sensor that converts mechanical stress into voltage, and is usually found in gasoline engines. How it works:
Detection
Mounted on the crankcase, the sensor uses piezoelectric crystals to measure engine vibrations and timings. Different degrees of compression on the crystals create varying voltage signals.
Response
The signals are sent to the engine control unit (ECU), which adjusts the ignition timing to prevent knocking or trigger a warning light.
Purpose:
Prevent knocking
Knocking, also known as pre-ignition or detonation, occurs when fuel burns unevenly in the cylinders, causing a pinging sound.
Maintain engine health
Knock sensors are essential for maintaining engine performance and longevity.
