ABSTRACT
The basic modeling technique for evaluating vehicle powertrain performance is via longitudinal dynamics. This technique involves dividing a given drive cycle into several time steps and calculating the state of the vehicle at the end of each time interval. To achieve the desired longitudinal acceleration levels for a given drive cycle, powertrain components must be sized appropriately to meet the desired performance levels. To allow for reserve power, conventional powertrains are often oversized for the intended use of the vehicle, leading to the operating point deviating from the optimal operating range. A hybrid powertrain optimized for the intended usage could simultaneously improve vehicle performance at reduced emissions.
