基于典型山地城市的轻型车比功率综合油耗模型

Comprehensive Fuel Consumption Model of Light Vehicle Specific Power Based on Typical Mountainous City

汽车在实际道路行驶时,影响其燃油消耗的因素较多且烦琐;目前的油耗模型不能全面反映油耗随工况的变化规律。由于汽车在坡道路面行驶的坡度阻力对油耗影响显著,采用回归分析法构建了上坡和下坡工况速度、加速度和坡度同时变化的比功率综合油耗模型;并通过典型路段验证模型。结果表明,在这两种工况中,理论油耗与实际油耗的相对误差较低,构建的理论回归方程可以反映典型路段比功率对油耗变化规律;且具有较高的油耗预测精度,为车辆油耗评估提供了一定的理论依据。

When cars were running on the road,the factors that affect its fuel consumption were more and cumbersome. The current fuel consumption model can not fully reflect the variation of fuel consumption with the operating mode. As the car running on the ramp road,grad resistance to fuel consumption significantly. The comprehensive vehicle specific power fuel consumption model while changing over time of speed,acceleration and slope with uphill and downhill by using regression analysis method. And the models were proved through some typical roads. Results shows that the relative error between the theoretical fuel consumption and the actual fuel consumption is low. The theoretical regression equation constructed can reflect fuel consumption with the change regulation of the vehicle specific power and has a high fuel consumption prediction accuracy,which provides a theoretical basis for vehicle fuel consumption evaluation.