Feed-back systems are electronic control units used in catalysed vehicles. They optimise carburetion when the vehicle is running on CNG and LPG while keeping the right air-gas ratio under all operating conditions.
The feed-back systems use the signals of several original vehicle sensors, such as the Lambda probe and TPS, in order to operate.
AEB feed-back systems offer the possibility of being adapted to various engine characteristics by making a few adjustments that, according to the model, may be done manually (using a microswitch) or with the help of more sophisticated tools like PC software or hand-held testers.
Some of the AEB feed-back systems also incorporate both the switch and the injector cutter so as to simplify system installation considerably.