1. Development of Free Religious Automotive I C Engines
P M V Subbarao
Professor
Mechanical Engineering Department
I I T Delhi
Controlled Combustion in CI & SI engines…..

2. Diagnostic Testing of HCCI-DI Engine

3. In-cylinder Processes in a Harsh HCCI-DI Engine

4. In-cylinder Processes in a Pure HCCI-DI Engine

5. Effect of Split Ratio on Range of Equivalence Ratio in CI Engines
7.0
Rich Mixture Zone
5.0 
3.0
1.0
Lean Mixture Zone

6. Effect of Split Ratio 80 % (Harsh) HCCI DI Engine Cylinder Process

7. Fuel Economy of Homogenization

8. Eco-friendly Behaviour of Homogenization
Smoke Opacity is the fraction (or %) of incident light which is adsorbed or scattered by the particulate matter in exhaust gas.

9. Control of Particulates in 80 % (Harsh) HCCI DI Engine - 1

10. Control of Particulates in 80 % (Harsh) HCCI DI Engine - 2

11. Effect of Degree of Homogenization : Particulates

12. Effect of Degree of Homogenization : HC Emissions

13. Effect of Degree of Homogenization : CO Emissions

14. Effect of Degree of Homogenization : NOx Emissions

15. Schematic Diagram of HCCI-DI Engine test setup with EGR & Fuel Heating

16. Effect of Exhaust Gas recirculation

17. Role of Fuel Heating

18. High Speed Operation of HCCI-DI Engine

19. Special Parameters for Combustion Characterization
Identification of Different Combustion Parameters

20. Evolution of CI Engine from Polite to Aggressive Attitude

21. Belligerent Nature of HCCI Engine

22. Evolution of Onset of Combustion

23. Selection of Pilot Injection Timing

24. Selection of PIT : For Safe Combustion

25. Selection of PIT : For Safe Combustion

26. HCCI-DI Engine is a Consciously Knocking Engine
The slope of RI for pure HCCI (100% premixed) combustion will be much steeper than 80% and 95% split ratio.

27. HCCI-DI is a Consciously Knocking Engine
Corresponding RI was 2.94 W/m2 and 13.5 W/m2.
Only 0.7 bar IMEP increase leads to 4 times increase in RI !!!
This RI (13.5 W/m2) is about 8 times higher to the baseline combustion at similar load condition.
The slope of RI for pure HCCI combustion will be much steeper than 80% and 95% split ratio.

28. Final Recommendations
COV of IMEP beyond 4 bar IMEP condition is found within 5%.
COV for baseline combustion remains around 3% irrespective of load.

29. Conclusions HCCI Engine Technology is an obvious future choice.
Extensive CAD is essential for the development of HCCI Engines.
CAD combined with experimental study will develop a better engine with faster development cycle.
More avenues for future research and development.