加载ORVR系统的轿车加油排放数学模型

Mathematical models of refueling emission for car with ORVR system

分析不同类型车载油气回收系统(ORVR)的结构,运用传质原理,针对ORVR系统中是否安装有压力控制阀,分别建立了机械式和液封式ORVR系统的轿车加油排放模型。仿真结果表明:安装ORVR系统后,轿车加油排放量比仅安装活性炭罐装置时减少97%;采用机械式ORVR系统,由于加油管口完全密封,轿车加油排放比采用液封式的减少37%;当ORVR系统中安装压力控制阀时,轿车加油排放比未安装压力控制阀时减少8%。可见,运用ORVR技术可以有效地控制轿车加油排放,降低环境污染。

The structures of different kinds of ORVR（on-board refueling vapor recovery） systems were analyzed. Aiming at the systems with pressure control valve or not, tow mathematical models of mechanical and liquid seal ORVR systems were established by using mass transfer principle. The comparison between model simulation result and experiment data shows that the quantity of refueling emission for car with ORVR decreases by 97% compared with that of car with activated carbon canister. Because the inlet of filling pipe is entirely sealed, the refueling emission of car with mechanical ORVR system reduces by 37% compared with liquid seal ORVR system. When pressure control valve is installed in the ORVR system, the refueling emission of car reduces by 8%. Obviously, the ORVR technique can be used to effectively control the refueling emission of car and to reduce environmental pollution. 5 figs, 9 refs.