A nonlinear dynamic model is developed in this study to simulate the overall performance of a naturally aspirated, single cylinder, four-stroke, direct injection diesel engine under cold start and fully warmed-up conditions. The model considers the filling and emptying processes of the cylinder, blowby, intake, and exhaust manifolds. A single zone combustion model is implemented and the heat transfer in the cylinder, intake, and exhaust manifolds are accounted for. Moreover, the derivations include the dynamics of the crank-slider mechanism and employ an empirical model to estimate the instantaneous frictional losses in different engine components. The formulation is coded in modular form whereby each module, which represents a single process in the engine, is introduced as a single block in an overall Simulink engine model. The numerical accuracy of the Simulink model is verified by comparing its results to those generated by integrating the engine formulation using IMSL stiff integration routines. The engine model is validated by the close match between the predicted and measured cylinder gas pressure and engine instantaneous speed under motoring, steady-state, and transient cold start operating conditions.

1.
Dai, Y. M., and Fowler, A., 1993, “Closed Cycle Diesel Engine Performance Evaluation by Computer Simulation,” ASME Paper 93-ICE-13.
2.
Watson, N., and Marzouk, M., 1977, “A Non-Linear Digital Simulation of Turbocharged Diesel Engines Under Transient Conditions,” SAE Paper 770123.
3.
Gardner, T. P., and Henein, N. A., 1988, “Diesel Starting: A Mathematical Model,” SAE Paper 880426.
4.
Medica, V., and Giadrossi, A., 1994, “Numerical Simulation of Turbocharged Diesel Engine Operation in Transient Load Conditions,” ASME Trans. Eng. Syst. Des. Anal. PD-Vol. 64-8.3, ASME, New York, pp. 589–596.
5.
Assanis, D. N., and Heywood, J. B., 1986, “Development and Use of a Computer Simulation of the Turbocompounded Diesel System for Engine Performance and Component Heat Transfer Studies,” SAE Paper 860329.
6.
Heywood, J. B., 1988, Internal Combustion Engine Fundamentals, McGraw-Hill, New York.
7.
Benson, R. S., 1971, “A Comprehensive Digital Computer Program to Simulate a Compression Ignition Engine Including Intake and Exhaust Systems,” SAE Paper 710773.
8.
Ramos, J. I., 1989, Internal Combustion Engine Modeling, Hemisphere, New York.
9.
Krieger, R. B., and Borman, G. L., 1966, “The Computation of Apparent Heat Release From Internal Combustion Engines,” 66-WA/DGP-4, ASME, New York.
10.
Hardenberg, H. O., and Hase, F. W., 1979, “An Empirical Formula for Computing the Pressure Rise Delay of a Fuel From its Cetane Number and From the Relevant Parameters of Direct-Injection Diesel Engines,” SAE Paper 790493.
11.
Watson, N., Pilley, A. D., and Marzouk, M., 1980, “A Combustion Correlation for Diesel Engine Simulation,” SAE Paper 800029.
12.
Woschni, G., 1967, “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE Paper 670931.
13.
Rezeka, S. F., 1984, “A Mathematical Model of Reciprocating Combustion Engine Dynamics for the Diagnosis of Deficient Energy Conversion,” Ph.D. dissertation, Wayne State University, Detroit, MI.
14.
Poublon, M., Patterson, D. J., and Boerma, M., 1985, “Instantaneous Crank Speed Variations as Related to Engine Starting,” SAE Paper 850482.
15.
Rezeka, S. F., and Henein, N. A., 1984, “A New Approach to Evaluate Instantaneous Friction and Its Components in Internal Combustion Engines,” SAE Paper 840179.
16.
Dabney, J. B., and Harman, T. L., 1998, Mastering Simulink 2, Prentice-Hall, Englewood Cliffs, NJ.
You do not currently have access to this content.