论文标题
车辆排对阻力系数和节能/节省含义的影响
Vehicle Platooning Impact on Drag Coefficients and Energy/Fuel Saving Implications
论文作者
论文摘要
在本文中，来自文献的经验数据用于开发一般电源模型，以捕获车辆位置的影响，在同质车辆的一组中，以及在其阻力系数上的距离距离（并跟随）车辆的距离差距。这些型号是为轻型车辆，公共汽车和重型卡车开发的。使用受约束的优化框架拟合模型，以使用直接阻力或燃油测量值拟合一般的功率函数。然后，该模型被用来将经验测量值推断到排内的各种车辆距离间隙。使用这些模型，我们估计与轻型车辆，公共汽车和重型卡车的同质排相关的潜在燃料减少。与基于恒定的阻力系数假设相比，结果显示，车辆燃料消耗显着降低。具体而言，考虑到$ 0.5 \的车辆之间的时间差距最少； SECS $（这是典型的考虑实践通信和机械系统潜伏期），其速度为$ 100 \; km/hr $，实现的最佳燃油减少为$ 4.5 \％$，$ 15.5 \％$和$ 7.0 \％\％\％$ $，分别用于轻型车辆，公共汽车和重型卡车排。在较长的时间间隙中，公共汽车和重型卡车排仍然以$ 9.0 \％$和4.5美元的订单降低燃料，而轻型车辆可节省燃油忽略不计。
In this paper, empirical data from the literature are used to develop general power models that capture the impact of a vehicle position, in a platoon of homogeneous vehicles, and the distance gap to its lead (and following) vehicle on its drag coefficient. These models are developed for light duty vehicles, buses, and heavy duty trucks. The models were fit using a constrained optimization framework to fit a general power function using either direct drag force or fuel measurements. The model is then used to extrapolate the empirical measurements to a wide range of vehicle distance gaps within a platoon. Using these models we estimate the potential fuel reduction associated with homogeneous platoons of light duty vehicles, buses, and heavy duty trucks. The results show a significant reduction in the vehicle fuel consumption when compared with those based on a constant drag coefficient assumption. Specifically, considering a minimum time gap between vehicles of $0.5 \; secs$ (which is typical considering state-of-practice communication and mechanical system latencies) running at a speed of $100 \; km/hr$, the optimum fuel reduction that is achieved is $4.5 \%$, $15.5 \%$, and $7.0 \%$ for light duty vehicle, bus, and heavy duty truck platoons, respectively. For longer time gaps, the bus and heavy duty truck platoons still produce fuel reductions in the order of $9.0 \%$ and $4.5 \%$, whereas light duty vehicles produce negligible fuel savings.
