Energy Flow Chart-Based Energy Efficiency Analysis of a Range-Extended Electric Bus

Abstract EN

This paper puts forward an energy flow chart analysis method for a range-extended electric bus.

This method uses dissipation and cycle energy, recycle efficiency, and fuel-traction efficiency as evaluation indexes.

In powertrain energy efficiency analysis, the range-extended electric bus is developed by Tsinghua University, the driving cycle based on that of Harbin, a northern Chinese city.

The CD-CS and blended methods are applied in energy management strategies.

Analysis results show with average daily range of 200 km, auxiliary power of 10 kW, CD-CS strategy, recycle ability and fuel-traction efficiency are higher.

The input-recycled efficiency using the blended strategy is 24.73% higher than CD-CS strategy, while the output-recycled efficiency when using the blended strategy is 7.83% lower than CD-CS strategy.