海拔对轻型汽油车RDE排放特性影响试验研究

程亮

车用发动机 ›› 2019, Vol. 0 ›› Issue (6) : 78-83.

栏目

海拔对轻型汽油车RDE排放特性影响试验研究

程亮

作者信息 +

Influence of Altitude on RDE Emission Characteristics of Light Duty Gasoline Vehicle

CHENG Liang

Author information +

文章历史 +

摘要

对某缸内直喷汽油车分别进行了不同海拔的海拔舱WLTC工况试验和实际道路排放测试，试验时未对发动机进行任何改动。结果表明：在海拔舱WLTC工况试验条件下，随海拔增加，CO排放先升高后降低，NO_x排放升高，PN排放先降低后升高。在RDE测试工况条件下，随着海拔的增加，CO和NO_x排放在城区工况下随之升高；在高速和综合工况下CO排放呈先升高后降低的趋势，NO_x排放呈先缓降再升高的趋势；PN排放在城区和综合工况下都呈先升高再降低后升高的趋势。CO和PN排放主要产生在高速工况，而NO_x排放主要产生在城区工况。总体来说，CO和PN在综合工况下的排放结果较城区工况下的排放结果偏高，而NO_x排放结果则反之。

Abstract

The gasoline direct injection (GDI) vehicle was used to conduct WLTC test and real driving emission test respectively at different altitudes simulated through plateau test bench without doing any change to the engine. The results showed that CO emission first increased and then decreased, NO_x emission increased, and PN emission first decreased and then increased with the increase of altitude under the condition of WLTC test at an altitude simulated by warehouse. Under the RDE test condition, CO and NO_x emissions increased in urban area, CO emission first increased and then decreased and NO_x emission first slowly decreased and then increased in motorway and comprehensive areas, and PN emission increased, then decreased and increased again in urban and comprehensive areas with the increase of altitude. CO and PN emissions mainly occurred in highspeed conditions, while NO_x emissions mainly occurred in urban conditions. In general, the emission results of CO and PN in comprehensive area were higher than those in urban area, while NO_x emission results were just the opposite.