Abstract: To study thermal-power conversion law of in-cylinder working substance of swash-plate engine, mass flow rate of working substance is calculated by nozzle principle firstly, and then heat release model of working substance is improved with considering the effect of seasonal reciprocating piston and the axial temperature difference of in-cylinder wall based on kinematics analysis for swash-plate engine, and thermodynamics model of in-cylinder working substance is established by energy conservation equation at last. The in-cylinder working process simulation of a swash-plate engine is realized by use of the calculation program based on the thermodynamics model. The simulation dynamometer card is consistent with that one calculated by Russian software in reference, and the simulation curves consist with the variation law of performance parameters during the six thermodynamic processes well, which is the validation of the model and simulation. The dynamometer card calculated by the established model provides initial parameters for dynamic simulation for swash-plate engine.

Key words: Heat release, Kinematics, Numerical analysis, Swash-plate engine, Thermodynamics, Bolted joints, Bouc-Wen model, Energy dissipation characteristics, Parameters identification