Thermodynamic modeling and simulation of working process of high efficiency two-stroke engine

Abstract

In this paper, the thermodynamic modeling and simulation of high-efficiency two-stroke engine are studied. Based on the assumptions of uniform distribution of working fluid, adiabatic process and complete combustion, key parameters such as initial volume and compression ratio are set, and the model is established according to the ideal gas law. The model includes energy and mass conservation equations and state equations, and is used to describe the thermodynamic behavior of the engine. Using MATLAB/Simulink platform, the influence on performance was evaluated by adjusting the parameters such as fuel injection time and quantity, inlet size and combustion chamber shape. The results show that optimizing fuel injection strategy can balance power output and fuel economy, increasing inlet size can improve charging efficiency, and improving combustion chamber shape is beneficial to enhance flame propagation and combustion stability. The performance of the engine under different working conditions is analyzed, and the design optimization suggestions are put forward accordingly, aiming at improving the engine performance in an all-round way and providing theoretical and practical guidance for the design of high-efficiency and environment-friendly two-stroke engine.