System Description: Description

The engine on energy management function ensures the stability of the on-board electrical system as well as an even charge balance in battery.

Given that the power output of the alternator is dependent on engine speed and temperature, plus the fact that many consumers use simultaneously, overload situations can arise that need to be buffered by the battery. When such an overload situation lasts for an extended period or when the charging capacity of the battery is low, a negative charge/discharge ratio may result that could impair the engine's starting capability.

In situations where the on-board electrical system is overloaded for prolonged periods, engine ON energy management works to increase the power output of the alternator in order to balance the charge/discharge ratio of the battery.

Energy management for driving encompasses the following sub functions:

• Function sequence for voltage provision
• Function sequence for dynamic idle speed control
• Function sequence for consumer reduction