Optimization of Exhaust-Pipe Tuning on a 4-Stroke Engine Using Simulation
Date Published: 2002-03-04
Paper Number:2002-01-0002
DOI: 10.4271/2002-01-0002
Author(s):
Dermot O. Mackey - Optimum Power Technology
John G. Crandall - Optimum Power Technology
Glen F. Chatfield - Optimum Power Technology
Malcolm C. Ashe - Optimum Power Technology
Engine performance simulation software has become an integral part of the engine designer's toolkit. However, optimization of a particular design using such software is often difficult and time consuming. This is due primarily to the number of parameters required to adequately characterize the engine and the interdependency of these parameters on one another. This paper reports on the use of optimization algorithms embedded within the simulation software package,
VIRTUAL 4-STROKE
™ (
1
)
1
, that help to automate the engine design process and shorten the development time to meet specific performance goals.
A previous paper by Blair et al (
2
), presented to the society at SETC 2001, demonstrated the ability to predict the behavior of tuned exhaust systems on a single cylinder 4-stroke motorcycle engine using
VIRTUAL 4-STROKE
. These engine and pipe arrangements are now optimized using simulation to achieve several different performance goals including maximum power and torque over both wide and narrow engine speed ranges. A fast, accurate and robust optimization strategy is presented. The benefit of such technology as a valuable and efficient design tool is demonstrated.
Experimental validation of the simulation was conducted on an engine dynamometer. Comparison with measured brake data for each optimized design is presented.
OPTIMUM Power Technology, Bridgeville, PA, USA, VIRTUAL 4-STROKE engine cycle simulation software, viz. Internet at www.optimum-power.com
Blair G. P., Mackey D. O., Ashe, M. C. Chatfield G.F., ”Exhaust Tuning On a Four-Stroke Engine; Experimentation and Simulation”, Small Engine Technology Conference, Pisa, November 2001, SAE Paper 2001-01-1797
Dvorak T. M., Hoekstra R. L., “Optimizing Internal Combustion Engine Performance Through Response Surface Methodology”, SAE Paper 962525
Novak J. M., Kach R. A., ”Computer Optimization of Camshaft Lift Profiles for a NASCAR V-8 Engine with Restrictor Plate”, SAE Paper 962514.
Corberan J. M., Royo R., Perez A., Santiago J., “Optmization of a 125 cc. Racing 2-S Engine Based on Modelling and Testing”, SAE Paper 942516
Fry M., King J., White C., “A Comparison of Gasoline Direct Injection Systems and Discussion of Development Techniques”, SAE Paper 1999-0100-171.
Tippet L. H.C., Technological Applications of Statistics, John Wiley & Sons, Inc., c 1950
Taguchi G., Introduction to Quality Engineering, Kraus International Publications, White Plains, NY, 1986
Shayler P. J., Tinwell P. R., Dixon J, Eade D., “A Development Methodology for Improving the Cold Start Performance of Spark Ignition Engines”, SAE Paper 940084.
Savage J. C., Matterazzo J. P., “Application of Design of Experiments to Determine the Leading Contributors to Engine Valvetrain Noise”, SAE Paper 930884.
Gardner T. P., “Investigation of the Effects of Engine Design Parameters on Diesel Combustion and Emissions Using Taguchi Methods”, SAE Paper 920116
Bush L. B., Unal R., Rowell L.F., Rehder J. J., “Weight Optimization of an Aerobrake Structural Concept for a Lunar Transfer Vehicle”, NASA Technical Paper 3262, December 1992
Wagner T. C., Papalambros P. Y., “Selection Families of Optimal Engine Designs Using Nonlinear Programming and Parametric Sensitivity Analysis”, SAE Paper 971600
Bi X., Han S., Wang J., “Numerical Optimization for In-cylinder Processes of a Spark Ignition Engine”, SAE Paper 941936
LMS International OPTIMUS, www.lmsintl.com
Engineous Software iSIGHT, www.engineous.com
IE 578, Using Simulation Models for Engineering Design (USMED), Penn State University Graduate Course Notes, Fall 1996
Blair G. P., Design and Simulation of Four-Stroke Engines, SAE, R-186
Winterbone D. E., Pearson R. J., Design Techniques for Engine Manifolds, Professional Engineering Publications, 1999.
McCartan C., McEntee P., Fleck R., Mackey D. O., “Computer Simulation of a 1.9 Litre Direct-Injection Diesel Engine”, SAE 2002-xx-xxxx
Blair G. P., Mackey D. O., Ashe M. C., Chatfield G. F., “On Improving the Accuracy of the Simulation of Reciprocating Engines”, IMechE Conference, London, November 1-2, 2000, C587/001/2000, p.27-43.
OPTIMUM Power Technology, Bridgeville, PA, USA, GP Control, viz. Internet at www.optimumpower.com
Purchase more technical papers and save! With TechSelect,
you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
Learn more >
*The appropriate SAE Member discount will be applied through the Shopping Cart process. Discounts vary according to level of membership:
Elite Member 20% Premium Member 15% Classic Member 10%
