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Nowadays urban climatic condition forces the passenger to keep air-conditioning (AC) on; thus further decreasing the fuel economy. ...In a typical urban drive; the vehicle commutes with low speed forcing IC Engine to run in its low efficiency operational points. ...It is observed in literature and simulation exercises that the fuel economy sharply falls with AC on condition in urban drive cycle and worsens in frequent start-stop and city traffic crawling. A study is required to study the improvement of fuel economy in a hybrid vehicle with AC on condition.

Transportation has significant and long-lasting economic, social and environmental impacts which makes it an important dimension of urban sustainability. The World is witnessing rapid changes in modern traveling behavior, and efforts are continuously being made to stimulate sustainable mobility solutions with smart policies, new business models, and advanced technologies (connected cars, sensors, electrification).

Today urban buses are equipped with more air consuming devices for an example pneumatic doors, exhaust brake, air suspension and in SCR system to name a few. ...This paper discussed about methodology used to reduce air consumption of air consuming devices used in urban bus application. Performance assessment of air consuming devices with minimum available air pressure was conducted and found satisfactory.