Research on emission fuel consumption cooperative test of heavy-duty gasoline vehicle under cold start

CATARC Automotive Test Center (Tianjin) Co., Ltd, Tianjin, 300300

^* Corresponding author: xdan@126.com

Abstract

This paper conducts emissions and fuel consumption collaborative test of heavy-duty gasoline vehicle, which based on cold start with chassis dynamometer, the data analysis uses cold and hot coefficient weighting to evaluate the results. The research shows that the cold start has a great influence on the pollutants and CO₂ emissions, which is mainly reflected in the 86.1% higher THC, 98.2% higher NO_X, 65.0% higher CO and 34.8% higher CO₂ of cold start cycle emissions compared with the hot start cycle emissions. The cold and heat weighted evaluation method can not only assessmen cold start cycle emissions, but also reasonably reflect the impact degree of cold start factors on emissions. The fuel consumption of cold start is 7.2% higher than that of hot start, the cold and heat weighted fuel consumption compared to the average fuel consumption of hot state is 1.0% higher. Therefore, it is necessary to add collaborative testing of emissions and fuel consumption of heavy-duty gasoline vehicles during cold start in the next phase of the standard