IMPROVEMENT OF SCR THERMAL MANAGEMENT SYSTEM AND REDUCTION OF EMISSIONS THROUGH COMBUSTION OPTIMIZATION

Meeting advanced emission norms involves multiple techniques and it has always been a challenging task on attaining the same. Improving the exhaust temperature is indispensable in order to enhance better conversion efficiency on the after treatment systems. This paper clearly investigates on the various strategies involved in order to improve the temperatures of selective catalytic reduction and post injection techniques to meet the emission norms. On the basis of MIDC operation, key load points were selected and split injections with three pulses were implemented. The variation of both the post injection timing and quantity were performed in this paper in order to evaluate the optimum output. The effect of post injection timing and quantity variation on hydrocarbon emissions, carbon monoxide, diesel oxidation catalyst temperatures was observed on all load points. The above strategy was also evaluated on generating the pressure crank angle data. SCR efficiency improvement was investigated on increasing the exhaust temperatures with various techniques like idle speed increase, throttle valve activation and post injection implementation.