| Abstract:Three types of light commercial vehicles were selected to carry out worldwide harmonized light vehicle test cycle（WLTC） and China light-duty vehicle test cycle-commercial（CLTC-C） comparative test on chassis dynamometer. The emissions of gaseous pollutants， particulate matter and fuel consumption were measured by constant volume sampling system， exhaust emission analyzer and other equipments， and particle size distribution was analyzed by DMS500 equipment in order to explore the emission performance and fuel consumption characteristics of light commercial vehicles under different drive cycles. The results show that the emissions of gaseous pollutants of vehicles using different fuels under different cycle tests are significantly diverse. NOx and CO emissions of gasoline vehicle under CLTC-C are better than those of WLTC， and the emissions of total hydrocarbon（THC） are slightly worse than those of WLTC. NOx and CO emissions of compressed natural gas（CNG） vehicle under CLTC-C are slightly worse than those of WLTC， and the emissions of THC are better than those of WLTC. The particulate matter emissions of gasoline vehicles and CNG vehicles under CLTC-C are much lower than those under WLTC. The results show that the peak particle size of particulate matter is around 8 nm and 75 nm and the concentration of accumulated particles of CNG vehicle under WLTC is significantly higher than that of CLTC-C. The average fuel consumption of WLTC is higher than that of CLTC-C， and the average fuel consumption at low speed stage is the highest during two test cycles. |