汽车排气中水蒸气对碳平衡法油耗检测结果的影响  

Influence of Water Vapor in Vehicle Exhaust on Fuel Consumption with Carbon Balance Method

作　　者：陶健[1] 庞夺峰[1] 王文君[1] 姜鑫[1] 

机构地区：[1]山西省交通科学研究院,山西太原030000

出　　处：《公路交通科技》2016年第6期140-145,共6页Journal of Highway and Transportation Research and Development

基　　金：山西省交通厅科技项目(2012-1-11)

摘　　要：为消除排气中水蒸气对碳平衡法油耗检测结果的影响,提高碳平衡油耗仪在不同检测条件下的检测精度,研究了碳平衡法检测原理,分析了水蒸气对检测过程的影响机理,进行了干湿气体体积换算的相关研究,建立了基于稀释气体温度、压强和相对湿度的湿度修正模型。针对不同的环境温度和燃料类型,试验了修正前后碳平衡法对油耗的检测结果,并分别与质量式油耗检测结果进行了对比。结果表明:该修正模型对油耗检测精度影响较为显著,修正后与质量式油耗检测结果更为接近。In order to eliminate the influences of water vapor in vehicle exhaust on fuel consumption detection with carbon balance method,and to improve the detection accuracy of fuel consumption meter based on carbon balance method under different test conditions,the detection principle of carbon balance method is studied,the influence mechanism of water vapor on the detection process is analyzed,and the related research on dry / wet gas volume conversion is conducted. A humidity correction model based on temperature,pressure and relative humidity of diluent gas is built. Under the conditions of different environment temperatures and vehicle fuel types,the results of fuel consumption before and after the correction of carbon balance test method are tested, and then compared with the results of quality fuel consumption test respectively. It shows that detection accuracy of fuel consumption is significantly influenced by the humidity correction model,and the result from the correction model is more consistent with that from quality fuel consumption test.

关 键 词：汽车工程 油耗检测 碳平衡法 湿度修正 水蒸气 

分 类 号：U461.8[机械工程—车辆工程]