柴油乘用车燃用丁醇燃料道路工况气态物排放特性

Characteristics of On-road Gas Emission from a Diesel PCV with Butanol-diesel Blends

基于PEMS(performance and emission monitoring system)车载排放测试方法,在一辆柴油乘用车上分别燃用纯国Ⅳ柴油、正丁醇的体积分数分别为10%和20%的正丁醇和纯国Ⅳ柴油的混合燃料,利用日本Horiba公司的OBS-2200车载气态排放物测试系统,对车辆尾气进行直采.通过对比不同道路类型下3种燃料气态排放物的排放因子,分析柴油乘用车燃用丁醇柴油的车载实际道路排放特性.试验结果表明,柴油乘用车燃用丁醇柴油可以明显降低一氧化碳排放,明显减小中高速工况下一氧化碳的峰值,总碳氢排放会随丁醇掺入比例增加而增多;二氧化碳的排放基本不变;发动机参数及工况的改变对氮氧化物的排放影响不大.

Based on the performance and emission monitoring system （PELVIS） on-board emission testing method, an on- board gas emission testing system made in Horiba of Japan was equipped, burning with the pure national IV diesel, 10% and 20 % by volume butanol-diesel blends on a diesel passenger car vehicles （PCV）. Compared with three different fuels＇ emission in different roads type, the characteristic of the on- road gas emission from a diesel PCV with butanol-diesel blends was analyzed with a reference to the different emission in different working conditions. The result shows that, a diesel PCV burning with the butanol-diesel blends can reduce the CO emission obviously, especially on the medium-high-velocity working conditiom the total hydrocarbons （THC） emission increases with the increasing of the butanol concentration; the CO2 emission remains basically unchanged; the NOx emission is influenced a little by the working condition and the engine parameters.