Paper Title
Assessing the Effect of Vehicle Traits on CO and HC Emissions during Different Engine Idling Speeds

Abstract
Abstract - The overall fleet of light-duty vehicles in most of the developing countries is characterized by various manufacturers of petrol-driven passenger cars.A thorough investigation of the exhaust emission from such cars is required to explore and address their contribution to the overall urban air quality. Notably, the fast-growing urban areas have a substantial mix of aged cars and also those having accumulated several kilometers of mileage during their present lifetime. It is, therefore, of paramount importance to understand how the vehicle age and mileage affect the tailpipe emission under different engine idling speed scenarios. The present study catered to 544 cars plying on the roads of Delhi, India and analyzed the exhaust emission monitored under two differentengine speed, that is, idling and high idling conditions.The study reported significant correlation values pointing at the age and mileage as prominent vehicular aspects affecting tailpipe parameters (CO and HC at idling vs. age, R2 = 0.93 and 0.69; at fast idling vs. age, R2 = 0.58 and 0.51 respectively and vs. mileage, R2 = 0.80 and 0.61 at idling and, 0.58 and 0.51 at high idling respectively). Keywords - Tailpipe Emission, Idle Testing, Urban Air Quality, Car Age, Car Mileage