How does knock control work ?
Knock Control is used to retard the ignition timing in the case that engine knock is detected by the sensors. By enabling short term retard, the knock is reduced, creating a safer system, and protecting the engine from potential damage and/or detonation. Long-term trim also ensures that in the case that the tune was incorrect, the long-term learning can implement a long-term retard where required, in order to further reduce knock.
Ignition Tuning - Knock
Select this option when more than one sensor is being used
Select this option for single sensors
Short Term Retard
This is the amount of short term retard that is applied when the Knock Detection has seen the Knock Signal exceed the Knock Threshold. (Default = 5º)
Short Term Decay Rate
This is the rate at which the short term retard will decay away. This is measured in Degrees per complete engine cycle. (Default = 0.5º/ECyc)
Retard Sample Rate
Limits the number of retard actions for this amount of time, in order to avoid multiple retard actions for one event from compounding on each other
Knock Detection Allows the ECU to monitor engine knock by enabling up to 2 knock sensors. Knock Detection is the configuration and setup of the detecting portion of the knock system in the ECU. For settings related to Knock Control (such as retard ...
Knock Control User's Guide
Introduction What is the Elite Knock Control function and how do you use it. Knock Detection and Knock Control are only available on the Nexus VCU and Elite 1000 and higher models. Hey, guess what? We've got a great article here to read and a video. ...
Knock Threshold The Knock Threshold table is used to allow the system to know when knock has occurred compared to normal background noise. The values in this table are the knock level above which true engine knock is said to be occurring. To set up ...
Knock Control Bank Long Term Trim
Knock Control Bank Long Term Trim This table shows long term trim adjustments based on prior engine knock events. From the Knock - Long Term Trim page you have the option to reset this table or you can Apply to Base Table which applies the ...
What is knock and why you should control it
This article will provide you with a background knowledge of what ‘knock’ is, how it comes about and what the ECU does to detect and prevent/limit damage occurring if knock does occur. What is Knock? Knock, pinging, detonation, pre-detonation, ...