You are given the engine map (Fig. P9.3) for a conventional homogeneous charge SI engine. (a) Looking at the engine map, identify whether the engine is naturally aspirated or it is...

You are given the engine map (Fig. P9.3) for a conventional homogeneous charge SI engine. (a) Looking at the engine map, identify whether the engine is naturally aspirated or it is turbocharged/supercharged. Mark the regions in the map where engine is most (highest) and least susceptible to knocking combustion. Justify your answers for the highest and lowest susceptibility toward knocking. (b) Assume engine is operating in a region susceptible to knocking, suggest two ways (actions to be performed) to run the engine in the non-knocking combustion.