In-cycle thermodynamic model of linear combustion engine

This paper presents a nonlinear time-based in-cycle thermodynamic model of a linear combustion engine (LCE) to utilize as a tool to develop precise control of a real prototype of an LCE. The model is posed as an open thermodynamic system and describes the thermodynamic, fluid-flow, heat-transfer and combustion phenomena that govern performance aspects of the combustion engine. The important equations, on which the model is based, are mass and energy conservation, with time as the independent variable. The overall LCE model consists of five sub-blocks: intake, two cylinders, exhaust and mechanics. The main benefit of the in-cycle thermodynamic model, which is introduced in this paper, is its ability to be an appropriate tool for development of modern optimal in-cycle control of the LCE, as well as for developing conventional controllers