Abstract
Electric vehicles are attracting considerable interests, but their shorter mileage per charge is a major drawback. In this study, we focus on the energy loss by slippage between tire and road surfaces, and the minimization of this loss by optimization of the traction/braking force distributions. The electric power consumptions under the running patterns of 10-15 mode and JC08 are theoretically estimated by taking account of the rolling resistance and air drag, utilizing the brush model. The drive-train configurations, such as rear-wheel drive or four-wheel drive will yield different mileage with the same vehicle and tire parameters. In our estimation, the four-wheel drive vehicle equipped with the optimum traction/braking force distribution improves the mileage on low μ road by 4.1% compared to rear-wheel drive vehicle.
