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The maximum power produced by the Engine is utilized in overcoming the Aerodynamic resistance while the remaining has been used to overcome rolling and climbing resistance. Increasing emission and performance demands paves way for advanced technologies to improve fuel efficiency. One such way of increasing the fuel efficiency is to reduce the aerodynamic drag of the vehicle. Buses emerged as the common choice of transport for people in India. By improving the aerodynamic drag of the Buses, the diesel consumption of a vehicle can be reduced by nearly about 10% without any upgradation of the existing engine. Though 60 to 70 % of pressure loads act on the frontal surface area of the buses, the most common techniques of reducing the drag in buses includes streamlining of the surfaces, minimizing underbody losses, reduced frontal area, pressure difference between the front & rear area and minimizing of flow separation & wake regions.

India's high Air Pollution level is the focus of discussions as we grow. Plans to combat this menace and implement the latest Technologies are gathering pace. The increasingly stringent emission legislations provide a continuous challenge for the non-road market. Tractor manufacturers are evaluating the need for cost-effective technology to meet upcoming stringent emissions targets. Simply following global approach may not work for Indian market considering the customer usage pattern & perceptions. With an anticipation of upcoming emission norms being based on US-EPA TIER-4 final up to 75 Hp, major technology up gradation is expected for farm equipment sold in India. The enormous diversification of engines within the different power classes as well as the operation specific requirements regarding various duty cycles, robustness and durability, requires specific solutions to meet these legal limits.