AUXILIARY ENGINE CONTROL UNIT, IN PARTICULAR AN ADAPTIVE AUXILIARY ENGINE CONTROL UNIT, FOR USE WITH A MAIN ENGINE CONTROL UNIT OR AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR AN INTERNAL COMBUSION ENGINE OF A VEHICLE

An auxiliary engine control unit for use with a main engine control unit for an internal combustion engine of a vehicle may have an input signal interface unit. The input signal interface unit may be configured to intercept at least one engine control output signal of the main engine control unit. The auxiliary engine control unit may also have a control unit which is configured to change the intercepted engine control output signal according to a control scheme stored in the control unit. The auxiliary engine control unit may also have an output signal interface unit which is configured to output the engine control output signal, changed by the control unit, to the internal combustion engine to be controlled in order to achieve an improved control of the internal combustion engine.