Similar to conventional vehicle,most in-wheel small EVs that exist today are designed with understeer (US) characteristic.They are\nsafer on the road but possess poor cornering performance.With recent in-wheelmotor and steer-by wire technology, high cornering\nperformance vehicle does not limit to sport or racing cars. We believe that oversteer (OS) design approach for in-wheel small EV\ncan increase the steering performance of the vehicle. However, one disadvantage is that OS vehicle has a stability limit velocity. In\nthis paper, we proposed a Four-Wheel Drive and Independent Steering (4WDIS) for in-wheel small EV with OS characteristic.The\naim of implementing 4WDIS is to develop a high steer controllability and stability of the EV at any velocity. This paper analyses\nthe performance of OS in-wheel small EV with 4WDIS by using numerical simulation. Two cornering conditions were simulated\nwhich are (1) steady-state cornering at below critical velocity and (2) steady-state cornering over critical velocity. The objective\nof the simulation is to understand the behavior of OS in-wheel small EV and the advantages of implementing the 4WDIS. The\nresults show that an in-wheel small EV can achieve high cornering performance at low speed while maintaining stability at high\nspeed.
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