A non-linear, transient, single-cylinder diesel engine simulation has been developed for predictions of instantaneous engine speed and torque. The foundation of our model is a physically based, thermodynamic, steady-state diesel engine simulation (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), which has been comprehensively validated for various engine designs. The transient extension of the parent model represents the diesel engine as a non-linear, dynamic system. The instantaneous crank-shaft speed is determined from the solution of the engine-external load dynamics equation, where the engine torque is tracked on a crank-angle basis. Validation of the transient model during rapid engine acceleration shows that both the cyclic fluctuations in the instantaneous crank-shaft speed line and the overall engine response are in good agreement with experimental measurements. Predictions of single-cylinder engine starting reveals the importance of selecting the proper value of the engine moment of inertia in order to control the amplitude of angular velocity fluctuations and ensure stable engine operation. It is further shown that the variation in the inertial forces on the reciprocating components with speed has a dramatic impact on the instantaneous torque profile, and consequently on angular velocity fluctuations.

1.
Bowns
,
D. E.
,
1970
–71, “
The Dynamic Characteristics of Reciprocating Engines
,”
I. Mech. E. Proc.
,
185
, pp.
185
201
.
2.
Hazell
,
P. A.
, and
Flower
,
J. O.
,
1970
, “
Sample-Data Theory Applied to the Modeling and Control Analysis of Compression Ignition Engines,” Part I and II
,
Int. J. Control
,
13
, pp.
549
562
.
3.
Windett
,
G. P.
, and
Flower
,
J. O.
,
1974
, “
Sample-Data Frequency-Response Measurements of a Large Diesel Engine
,”
Int. J. Control
,
19
, pp.
1069
1086
.
4.
Ledger, J. D., Benson, R. S., and Whitehouse, N. D., 1973, “Dynamic Modelling of a Turbocharged Diesel Engine,” I. Mech. E. Proc. CP15.
5.
Benson, R. S, Ledger, J. D., Whitehouse, N. D., and Walmsley, N. D., 1973, “Comparison of Experimental and Simulated Transient Responses of a Turbocharged Diesel Engine,” SAE Paper 730666.
6.
Jensen, J. P., Kristensen, A. F., Sorenson, S. C., Houbak, N., and Hendrics, E., 1990, “Transient Simulation of a Small Turbocharged Diesel Engine,” SAE Paper 904182.
7.
Berglund
,
S.
,
1993
, “
A Model of Turbocharged Engines as Dynamic Drivetrain Members,” SAE Paper 933050
,
SAE Trans.
,
102
, pp.
1027
1034
.
8.
Benson, R. S., 1971, “A Comprehensive Digital Computer Program to Simulate a Compression Ignition Engine Including Intake and Exhaust Systems,” SAE Paper 710773.
9.
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.
10.
Winterbone, D. E., Thiruarooran, C., and Wellstead, P. E., 1977, “A Wholly Dynamic Model of a Turbocharged Diesel Engine for Transfer Function Evaluation,” SAE Paper 770124.
11.
Watson., N., and Marzouk, M., 1977, “A Non-Linear Digital Simulation of Turbocharged Diesel Engines Under Transient Conditions,” SAE Paper 770123.
12.
Zhang
,
G.
,
Filipi
,
Z. S.
, and
Assanis
,
D. N.
,
1997
, “
A Flexible, Reconfigurable, Transient Multi-Cylinder Diesel Engine Simulation for System Dynamics Studies
,”
Mech. Struct. Mach.
,
25
No.
3
, pp.
357
378
.
13.
Poola, R. R., Sekar, R., Assanis, D. N., and Cataldi, G. R., 1996, “Study of Oxygen-Enriched Combustion Air for Locomotive Diesel Engines,” ICE-Vol. 27-4, Proceedings of ASME-ICE Fall Technical Conference, Fairborn, OH.
14.
Assanis, D. N., 1985, “A Computer Simulation of the Turbocharged Turbocompounded Diesel Engine System for Studies of Low Heat Rejection Engine Performance,” Ph.D. thesis, M.I.T.
15.
Watson, N., Pilley, A. D., and Marzouk, M., 1980, “A Combustion Correlation for Diesel Engine Simulation,” SAE Paper 800029.
16.
Shampine, L. F., and Gordon, M. K., 1974, Computer Solution of Ordinary Differential Equations: The Initial Value Problem, Freeman, San Francisco.
17.
Millington
,
B. W.
, and
Hartles
,
E. R.
,
1968
, “
Frictional Losses in Diesel Engines
,” SAE Paper 680590,
SAE Trans
,
77
, pp.
2390
2406
.
18.
Liu, H., Chalhoub, N. G., and Henein, N., 1997, “Simulation of a Single-Cylinder Diesel Engine Under Cold-Start Conditions Using Simulink,” ASME-ICE Spring Technical Conference Proceedings, Fort Collins, CO.
19.
Marek, S. L., Henein, N. A., and Bryzik, W., 1991, “Effect of Load and Other Parameters on Instantaneous Frictional Torque in Reciprocating Engines,” SAE Paper 910752.
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