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In this work, an intercity bus has been redesigned with enhanced exterior styling, reduced aerodynamic drag and increased comfort for the passengers. Extensive product study and market study were carried out and aspirations and frustrations of commuters were recorded. An operating intercity bus was benchmarked and analyzed for styling, aerodynamic performance and comfort. Fluent, a commercial CFD code was used to evaluate the aerodynamic performance. Principles of product design were used to analyse the styling and comfort. The benchmarked high floor bus was redesigned with low - floor for reduced aerodynamic drag. The exterior was redesigned with emphasis on improvised aerodynamic performance and appealing looks. The interior was modified to meet aspirations of the commuters. The results of the redesigned exterior body showed a reduction of Cd from 0.53 to 0.29 and overall aerodynamic drag reduction by 60% due to combined effect of reduced Cd and frontal area.

In the present study, the power train of a series hybrid electric car was designed to meet the specified requirements of a four seater benchmarked passenger car-Wagon R. The 47.7 kW gasoline engine of Wagon R was downsized to 33.4 kW and the induction motor used for traction was rated at 54.5 kW. Ni-MH battery of 54.5 kW peak with 65 Ah was identified to serve as Peak Power Source (PPS).The performance of designed power train of series HEV under various drive cycles (specially designed drive cycle, FTP, US06, UDDS, EUDC2 and HWY) was tested using a developed MATLAB simulation program. The simulation results depicted the Depth of Discharge (DoD) behaviour of the battery during the drive along the tested drive cycles. An average motor efficiency of 83% was observed during the sample drive cycle tested.