| (7.1) |
Three different approaches are used to obtain charge stratification viz., spray jet controlled, wall controlled and flow controlled Discuss the differences in the duration of initial heat release rate ( 0 to 10%) and heat release rates towards the end of combustion ( 80 to 90%) with the three methods. What factors are responsible for these differences? |
| (7.2) |
What type of emission control technologies may be employed to reduce HC and NOx emissions in the DISC engines operating in the different air-fuel ratio regimes? |
| (7.3) |
What are significant differences between CAI and HCCI engine systems from the point of mixture preparation and charge homogeneity? |
| (7.4) |
What are main methods being studied to HCCI combustion in the diesel type engines? Discuss their merits and demerits. |
| (7.5) |
Why is it not possible to build a practical engine to operate in HCCI mode in the whole speed and load range of a SI or CI engine? |
| (7.6) |
Discuss why a HEV is more energy efficient than the vehicles powered by the conventional IC engine |
| (7.7) |
Discuss why a HEV is more energy efficient than the vehicles powered by the conventional IC engine |
| (7.9) |
Discuss why the energy efficiency of fuel cells at part loads is much higher than for the IC engines. |
