汽油车加油过程油气蒸发损失试验方法

分析了汽车加油过程中汽油蒸汽排放量测量的试验方法, 设计了一套用于检测加油过程汽油蒸汽排放的收集设备, 介绍了设备的基本组成和工作原理, 在平均温度为25℃和雷德蒸汽压为62kPa的条件下进行了3组试验, 测量了汽油车加油过程中的油气蒸发量。试验结果表明:安装活性炭罐但未安装车载油气回收系统 (ORVR) 的检测系统, 能够减少15.7%的加油过程排放;而当同时安装活性炭罐和ORVR后, 能够减少93.9%的加油过程排放。

Experimental method of gasoline evaporation loss in refueling process of vehicle

In order to measure the gasoline vapor emission quality in refueling process, the experimental methods of gasoline evaporation loss were studied, and a collection equipment was designed.The basic components and working principle of the equipment were introduced.Under the condition that average temperature was 25 ℃ and RVP (Reid vapor pressure) was 62 kPa, three experiments were operated.The result shows that for the detection system with carbon canister but without ORVR (on-board refueling vapor recovery) , refueling emission reduces by 15.7%. However, while installing carbon canister and ORVR, refueling emission reduces by 93.9%.