*State Key Lab. of Automotive Energy and Safety Tsinghua University, Beijing, China 100084 Phone: 010-62771839 Regenerative Braking Systems (RBS) provide an efficient method to assist hybrid electric buses achieve better fuel economy while lowering exhaust emissions. This paper describes the design and testing of three regenerative braking systems, one of which is a series regenerative braking ...

1 The fuel economy and emissions of both conventional and hybrid buses equipped with emissions 2 aftertreatment were evaluated via computational simulation for six representative city bus drive cycles. 3 Both series and parallel configurations for the hybrid case were studied. The simulation results indicate 4 that series hybrid buses have the greatest overall advantage in fuel economy. The ser...

Three configurations (series, parallel, and series-parallel) of the hybrid electric vehicle (HEV) are studied, this study investigates the advantages and disadvantages of three HEV in the paper. Power flow simulations are conducted with the MATLAB/Simulink-based software Advanced Vehicle Simulator (ADVISOR). These simulations are used to study how efficiency and agility are affected by the moto...

In this paper, an indirect adaptive fuzzy sliding mode control scheme is designed for hybrid electric bus. The trajectory tracking control for stopping the bus in a bus station is proposed. The control strategies of regenerative braking in the hybrid electric bus add the control difficulty of the longitudinal braking system. Its nonlinearities are estimated by adaptive fuzzy method and projecti...

In this paper, the development and optimization of Power Distribution Control Strategy (PDCS) have been performed for a Hybrid Energy Storage Systems (HESS) of a Series Hybrid Electric Bus (SHEB). A common PDCS is based on the use of Ultra-Capacitor (UC) pack. A new simple PDCS is developed as a battery based one. For the battery based PDCS, four parameters ar...

Against a kind of parallel hybrid electric bus which is demonstrated in a city of China, a simulation model of the parallel hybrid powertrain system is established by referring to parameters of the demonstrating bus. Regarding the Chinese typical city bus driving cycle and the bus driving cycle of Harbin City, Heilongjiang Province as the driving cycles for the simulation, the fuel economy of t...