Exhaust emission and fuel consumption characteristics of light duty under different driving cycles

Abstract

This paper focuses on light duty of china 6 with the same emission control technology. three vehicles, with different engine displacements, were selected to study the emission and fuel consumption characteristics under three test cycles of NEDC, WLTC and CLTC. The results show that the emissions of CO, THC and NOx under WLTC cycle are minimum, compared with the NEDC and CLTC circulation. with the decrease of the engine displacement, the difference of CO and THC emissions increases among different cycles, which shows small displacement engine vehicles are greatly affected by driving cycles. Compared with other testing conditions, the PN emissions are relatively larger, but the difference of PN emissions is very small among the three test cycles.The fuel consumption of the WLTC test cycle is the smallest among the three cycles. As the engine displacement decreases, the fuel consumption difference decreases, indicating that the fuel consumption of large displacement engine vehicles is greatly affected by the cycle condition.

Quantifying Emissions in Vehicles Equipped with Energy-Saving Start-Stop Technology: THC and NOx Modeling Insights

“…The application of start-stop technology in the context of THC (total hydrocarbons) and NOx (nitrogen oxides) emissions aims to significantly reduce these harmful substances in urban conditions [18,19]. When a vehicle comes to a stop at an intersection or in traffic, the engine is automatically shut off, eliminating unproductive fuel combustion and thereby reducing hydrocarbon emissions into the atmosphere.…”