Numerical inversion of the dynamic model of a single-cylinder diesel engine

Abstract

This paper presents a numerical technique to invert the dynamic model of a single-cylinder diesel engine. The method is employed to estimate the parameters of an engine from the data of crankshaft angular velocity, indicated torque, dynamometer angular velocity and applied load. The numerical inversion is performed during both the transient and steady-state responses of the dynamic model. The method is developed with the aim of giving the designer information about the engine parameters which achieve a required performance characteristic (crankshaft velocity, indicated torque and applied load) and for tuning the parameters which play an important role in dynamic modelling. The model is implemented in MATLAB/SIMULINK, and simulation results are presented. The simulation predictions of the engine and dynamometer parameters are compared with physical values, and they are in excellent agreement. Further, a comparison between the measured crankshaft velocity with simulated engine velocity calculated from the inverted parameters is presented, showing very good agreement. Copyright © 2000 John Wiley & Sons, Ltd.