Within the framework of CO2 measures, intelligent alternator control (IGR) achieves partial energy recuperation of the kinetic energy used by the engine. The core principle of IGR is an extension of the charge strategy of the vehicle battery. The battery must be able to absorb energy at any time and is no longer fully charged. A 100 % charged battery cannot absorb any more energy, so the IGR prevents this.
In contrast to conventional charge strategies, energy recuperation only takes place in the coasting phases of the vehicle. Here, the alternator is excited to the maximum, electrical energy is generated and fed to the vehicle battery. Fuel is not consumed. In the acceleration phases of the vehicle, the alternator is not excited. This means that no energy - and thus no fuel - is used to generate electrical energy.
The IGR function requires an intelligent sensor at the negative terminal of the vehicle battery as well as a communication interface at the alternator.
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