Knock Detection

This module configures the ECUs response when knock is detected.

When the ECU detects knock, it applies ignition retard until the detected knock has been eliminated. The amount of additional ignition retard applied is calculated each cylinder cycle. The formula is as follows:

(Voltage of Knock Sensor Signal - Knock Sensor Threshold) x Ignition Knock Retard Proportional Gain - Ignition Knock Retard Feed Forward.

However, on the first cycle only, Ignition Retard First Step Offset is added to the result in order to give an additional kick to the amount of ignition retard applied immediately.

Once the engine has stopped knocking, the ECU waits an additional period (Ignition Knock Cooling Cycles) before it begins to reduce the amount of ignition retard applied.