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A new concept electric vehicle (EV) with four-in-wheel motor is developed to make EVs spread widely. Each motor is mounted inside a wheel and can be controlled individually. The batteries and electrical components are placed in the hollow space of frame structure under the seats. Such a compact configuration permits packaging flexibility by eliminating the central drive motor and driveline components, including the transmission, the mechanical differential, the universal joints and the drive shaft. Apart from many mechanical advantages of such a structure, high performances of chassis control systems such as traction control, electronic differential control, direct yaw moment control and regenerative braking control systems are employed due to the rapid response and precise torque control of the motor. Simulation is conducted in ADVISOR and Matlab/Simulink environment.

The previous study indicates that the detonation waves generated by acetylene/oxygen mixture can converge in the combustion chamber. In order to verify the destructive effect of detonation wave convergence on piston materials, the detonation bomb device was modified to fundamentally investigate the material failures of aluminum alloy for pistons. The results show that the specimens are destroyed in the middle and edge region after dozens of detonations, which is consistent with the typical characteristics of the piston failures in engines. Therefore, the hypothesis that failures of piston material is caused by the detonation wave convergence is verified.