Impact of acceleration patterns on size and performance of hybrid electric vehicle components

摘要

The performance characteristics we expect of a car are determined by our experience with today's vehicles. This has led to a wide acceptance of acceleration patterns that require the power train and storage of an HEV (Hybrid Electric Vehicle) tooperate under unfavourable load conditions. Since the power available from batteries not only depends on the State of Charge (SoC) but even more on the Depth of Discharge it is crucial to understand the relationship between acceleration power requirements and the different vehicle components involved. By means of simulation, it is shown that slight changes in the acceleration profile will significantly improve the range. and fuel consumption for an electric hybrid vehicle as well as reducing the size ofthe power components.If drive schedules such as the Federul Urban Drive Schedule (FUDS) are analysed it is obvious that the change required to minimise fuel consumption and components size affect less than 5% of the schedule and will only result in a marginal increase of thetime required to complete a journeyThe paper shows that an optimal combination of traction motor, battery storage and Prime Mover Unit (PMU) can be found, allowing the vehicle to participate in general traffic but at the same time reduce the peak energy demand.