• Figure 2: Generic Hybrid Drivetrain

The load power of a vehicle varies randomly in actual operation due to frequent acceleration, deceleration and climbing up and down the grades. The power requirement for a typical driving scenario is shown in Figure 3. The load power can be decomposed into two parts:

• i.  steady power, i.e. the power with a constant value

ii.  dynamic power, i.e. the power whose average value is zero




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  Figure 3: Load power decomposition