To understand how the engine safeties work it is important to understand why the knock sensors on the car retard ignition. The knock sensors are effectively extremely sensitive microphones bolted to the side of the engine block. They are calibrated by Audi and each stroke has a set audible frequency which is picked up by the knock sensors. These sensors continuously monitor the combustion cycle to ensure everything is as it should be and within Audi’s set tolerance. If it starts to pick up inconsistencies in the combustion cycle (this is not necessarily a knock event) it begins to retard the ignition timing on the car to correct the combustion cycle and bring it back into specification.
The current engine safety offerings will take into account
* Knock
* Overboost
* Differential Fuel Pressure
* Fuel Trims
* Lambda
* Early injector failure
* Early coil pack failure
* Misfire
The safety thresholds are customisable depending on your setup and how much protection is needed for the engine. For example, built engines can be a lot more forgiving than stock engines. Built engines are also much more likely to introduce cylinder noise which is picked up as an inconsistency by the knock sensors as aftermarket pistons have higher PTW clearance and may be different weights materials etc.
When the engine safety is tripped based on our threshold, the ECU will notify you of this by flashing the EML and automatically switching down to a map which relies on less fuel octane content as a preventative measure.
The current engine safety offerings will take into account
* Knock
* Overboost
* Differential Fuel Pressure
* Fuel Trims
* Lambda
* Early injector failure
* Early coil pack failure
* Misfire
The safety thresholds are customisable depending on your setup and how much protection is needed for the engine. For example, built engines can be a lot more forgiving than stock engines. Built engines are also much more likely to introduce cylinder noise which is picked up as an inconsistency by the knock sensors as aftermarket pistons have higher PTW clearance and may be different weights materials etc.
When the engine safety is tripped based on our threshold, the ECU will notify you of this by flashing the EML and automatically switching down to a map which relies on less fuel octane content as a preventative measure.