Hyundai Elantra: Knock Sensor (KS). Description and Operation - Engine Control System - Fuel System - Hyundai Elantra MD 2010-2018 Service manualHyundai Elantra: Knock Sensor (KS). Description and Operation


Description

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.
When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.


    Installation
    • Install the component with the specified torques. • ...

    Knock Sensor (KS). Specifications
    Specification Item Specification Capacitance (pF) 850 ~ 1,150 ...