A new development idea of general engine performance simulation software was proposed

and the software was developed based on it. Using C++ language

a general program framework was established to realize various simulation calculation functions

including one-dimensional detailed calculation

volumetric calculation

real-time calculation in the steady-state and transient-state calculation. The main components such as cylinder

intake and exhaust port

junction

turbocharger contained a variety of calculation models

which can be selected according to modeling requirements. Based on a medium-speed diesel engine

the operating process of performance calculation was introduced in detail

and the calculated results were compared with the test data. The results show that the calculation precision of the software is high and the real-time software can fully meet the requirements of real-time analysis

and real-time ratio can reach 3.92.