MATHEMATICAL MODELING AND ANALYSIS OF THERMODYNAMIC PROCESSES OF AN IRREVERSIBLE MILLER CYCLE WORKING ON A PISTON ROTARY ENGINE
Epifanio M Ticona1; Alexandre Zuquete Guarato1; Sergio L Braga1
1 Pontifical Catholic University of Rio de Janeiro
doi:10.20906/CPS/COB-2015-1972
Resumo
To develop high energy-density power generation engine with variable geometrical compression ratio, the performance of an irreversible air standard Miller cycle in a piston rotary engine denominated Kopelrot Rotary Engine (KRE), was analyzed using thermodynamic numerical simulations. With consideration of the characteristics of the working processes in the KRE, corresponding differential equations were established and then simplified by period features. Application of Miller cycle in conventional engines can be realized by either early or late intake valve closing (EIVC or LIVC); in KRE engine this can be achieved varying the position of inlet port. Thermodynamic modeling shows that the Miller cycle has the potential to increase fuel efficiency compared to a conventional Otto-cycle engine, however with the cost of a reduced engine power density.
Palavras-chave: swing piston engine; mathematic model; thermodynamic process; Miller cycle