Simulation of quasi-dimensional model for diesel engine working process

Abstract

In order to improve the precision of quasi-dimensional model for predicting diesel engine performance, three kinds of air entrainment period in quasi-dimensional model for diesel engine working process is developed in this research. The software MATLAB/Simulink is utilized to build the quasi-dimensional model for diesel engine and different kinds of air entrainment period effect on the performance prediction of diesel engine are simulated. The simulation results show that the relative errors of diesel engine performance between three methods are obvious different at rated working condition. It can be concluded that the proper method to calculate air entrainment period must be selected to improve performance prediction precision of simulation model.

Modelling and Simulation of Air Entrainment Period Effect on Prediction of Quasi-dimensional Model for Diesel Engine

“…The quasi-dimensional model for diesel engine working process in this research is divided into six sub-models, namely compression sub-model, combustion sub-model, expansion sub-model, exhaust sub-model, inlet and outlet valve overlap sub-model and intake sub-model [3][4]. The simulation results, which include instantaneous data such as pressure, temperature, mass and performance parameters are obtained by solving the energy conservation equations, the mass conservation equations and the ideal gas state equations.…”