Working cycle analysis of the internal combustion engine with heat regeneration

The way of heat regeneration in the cycle of internal combustion engine (ICE) is suggested. An expression for thermal coefficient of performance (COP) is derived which considers the differences in polytropic coefficient of expansion and compression processes, the level of heat regeneration as well as different compression and expansion ratios in compression and expansion cylinders. The values of this COP for different values of compression and expansion ratios in regeneration degree of 0.5…0.8 are received considering real values of heat capacities and polytropic coefficients in compression and expansion processes. The results were of this cycle calculation were compared with basic Otto cycle values.