轻型柴油车辆滑行工况油耗特性试验  

Experiment about fuel consumption performance of light-duty diesel vehicles under coasting condition

作　　者：蔺宏良[1,2] 余强[1] 张雪莉[1,2] 

机构地区：[1]长安大学汽车运输安全保障技术交通行业重点实验室,陕西西安710064 [2]陕西交通职业技术学院汽车工程系,陕西西安710018

出　　处：《长安大学学报（自然科学版）》2013年第5期113-117,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：中央高校基本科研业务费专项资金项目(CHD2011SY009);汽车运输安全保障技术交通行业重点实验室开放基金资助;陕西省自然科学基金基础研究计划项目(2011JM7012);长安大学基础研究支持计划专项资金项目

摘　　要：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 fuel consumption model for vehicles traveling on road, taking some light-duty diesel vehicles as object, speed, time and fuel consumption rate were gathered by road coasting test. Furthermore vehicle＇s fuel consumption characteristics were obtained after linear regression analysis. The results show that the fuel consumption under coasting condition is much lower than with comprehensive consideration of coasting distance, instantaneous fuel consump- tion rate and energy conversion that under constant speed, and the instantaneous fuel consump- tion rate of forced idling is much lower than that under the neutral gear. In addition, the accumu- lated fuel consumption in the neutral gear is much higher than that in the different gears, and the lowest is in 4th gear. Therefore, in order to reduce vehicle＇s operating fuel consumption for light- duty diesel vehicles, coasting in gear should have priority to coasting in the neutral and selectingreasonable coasting speed range is important. 4 tabs, 7 figs, 6 refs.

关 键 词：汽车工程 轻型柴油车辆 经济驾驶 滑行 油耗特性 线性回归 能量分析 

分 类 号：U463.6[机械工程—车辆工程]