This work investigates a purely thermal control system for HCCI engines, where thermal energy from exhaust gas recirculation (EGR) and compression work in the supercharger are either recycled or rejected as needed. HCCI engine operation is analyzed with a detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry and Transport), which has been extensively modified for application to engines. HCT is linked to an optimizer that determines the operating conditions that result in maximum brake thermal efficiency, while meeting the restrictions of low and peak cylinder pressure. The results show the values of the operating conditions that yield optimum efficiency as a function of torque for a constant engine speed (1800 rpm). For zero torque (idle), the optimizer determines operating conditions that result in minimum fuel consumption. The optimizer is also used for determining the maximum torque that can be obtained within the operating restrictions of and peak cylinder pressure. The results show that a thermally controlled HCCI engine can successfully operate over a wide range of conditions at high efficiency and low emissions.
Thermal Charge Conditioning for Optimal HCCI Engine Operation
Contributed by the Fuels and Combustion Technologies Division and presented at the International Mechanical Engineering Congress and Exposition, the Winter Annual Meeting of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS, Orlando, Florida, November 5–10, 2000. Manuscript received by the Division, February 15, 2001; revised manuscript received July 18, 2001. Associate Editor: C. T. Avedisian.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Martinez-Frias, J., Aceves, S. M., Flowers, D., Smith, J. R., and Dibble, R. (March 25, 2002). "Thermal Charge Conditioning for Optimal HCCI Engine Operation ." ASME. J. Energy Resour. Technol. March 2002; 124(1): 67–75. https://doi.org/10.1115/1.1447928
Download citation file:
- Ris (Zotero)
- Reference Manager