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为了建立车辆在实际道路上行驶的油耗模型,以某轻型柴油车辆为对象,通过场地滑行试验,采集脱挡与带挡滑行的车速、时间及瞬时耗油率数据,对比发动机万有特性,综合考虑滑行距离、瞬时耗油率及能量变化利用线性回归分析得到车辆平路滑行油耗特性。分析结果表明:车辆滑行油耗远低于经济车速等速油耗,且带挡滑行瞬时耗油率远低于脱挡滑行瞬时耗油率,而各挡强制怠速瞬时耗油率略有差异;车辆滑行相同距离时,空挡滑行累计耗油量最多,而4档滑行最低;对于轻型柴油车辆,为实现节能减排应在保证安全的前提下多选择滑行,且平路滑行时应选择带挡滑行,并合理控制滑行车速区间。
In order to establish the fuel consumption model of a vehicle running on the actual road, taking a light-duty diesel vehicle as an object, this paper collects the speed, time and instantaneous fuel consumption data of off-gear and belt-driven taxiing through field taxiing test, compares all the characteristics of the engine, Taking into account taxi distance, instantaneous fuel consumption and energy changes, the linear regression analysis was used to obtain the fuel consumption characteristics of the flat road taxiing. The results show that the fuel consumption of taxiing is much lower than that of economic vehicle speed, and the instantaneous fuel consumption of belt taxiing is much lower than the instantaneous fuel consumption of taxiing, while the instantaneous fuel consumption of each gear is slightly different. For the same distance, the neutral gear has the largest cumulative fuel consumption and the lowest gear in 4th gear. For light diesel vehicles, to achieve energy conservation and emission reduction, multiple taxiing should be selected on the premise of ensuring safety, And reasonable control of taxi speed range.