摘要：

The paper shows experimental measurements of diesel vehicles with a view to investigate the dependence and correlation between the emission level and vehicle relate parameters. The data for validation were gathered on different locations in Gorakhpur city of Uttar Pradesh. For this purpose, a total number of 100 government and private buses distributed across model years ranging between 1988 and 2007 were tested under idling conditions. The indicator monitored include average smoke density with different vehicles related parameters, like vehicle age, vehicle mileage, engine capacity, number of cylinders, working status of odometer, level of inspection/maintenance and emission control system. Out of the several vehicles related parameters, vehicle age was found to be most crucial one, and showed good correlation with average smoke density. The outcome of the study relating to the effect of various vehicle-related parameters on smoke density of diesel driven buses has led to the useful inferences, which can be used not only for predicting the smoke density of vehicles with respect to vehicle age, but also for the manufacturing and maintenance sector to help them produce environmentally benign diesel buses having long-lasting compliance of pollution control systems with respect to vehicle age, while ensuring regular and realistic monitoring and maintenance of pollution control systems exclusively.

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