Design and Simulation of Two Stroke Engines

Chapter 6 - Empirical Assistance for the Designer
The most important global view expressed here for you to consider is that the actual
engine, like the engine model, uses the "separate" technologies of Chapters 1 to 4 to behave
like the paper engines of Chapter 5. The best engine designer is one who can think in terms of
a paper engine turning in his mind, each turn bringing images of the effect of changing the
unsteady gas flow regime, the scavenging regime, and the combustion regime together with
the mutual interaction of each of those effects. This implies a thorough understanding of all of
those topics, and the more thorough that understanding, the more complex can be the interaction
which the mind will handle. Should one of those topics be missing or poorly understood,
then the quality of the mental debate will suffer. It is hoped that the visual imagery provided
by the computer programs referenced will accelerate the understanding of all of these topics.
As pointed out frequently thus far, our comprehension of many phenomena is in its infancy
and it is only thirty-five years on from the general availability of computers and also the
black art of much of the 1950s' technology. It behooves the thinking designer to follow and to
study the progress of technology through the technical papers which are published in this and
related fields of endeavor.
The remainder of this book will concentrate on selected specialized topics, and particularly
on the future of the design and development of two-stroke engines.
References for Chapter 6
6.1 J.L.M. Morrison, B. Crossland, An Introduction to the Mechanics of Machines. 2nd
Ed., Longman, London, 1971.
6.2 F.S. Tse, I.E. Morse, R.T. Hinkle, Mechanical Vibrations. Theory and Applications.
2nd Ed., Allyn and Bacon, 1978.
6.3 C. Bossaglia, Two-Stroke High Performance Engine Design and Tuning. Chislehurst
and Lodgemark Press, London, 1972.
6.4 H. Naitoh, M. Taguchi, "Some Development Aspects of Two-Stroke Cycle Motorcycle
Engines," S AE Paper No. 660394, Society of Automotive Engineers, Warrendale,
Pa., 1966.
6.5 H. Naitoh, K. Nomura, "Some New Development Aspects of Two-Stroke Cycle Motorcycle
Engines," SAE Paper No. 710084, Society of Automotive Engineers,
Warrendale, Pa., 1971.
6.6 J.F.T. MacClaren, S.V. Kerr, "Automatic Reed Valves in Hermetic Compressors,"
IIR Conference, Commission III, September 1969.
6.7 R.Fleck, "Expanding the Torque Curve of a Two-Stroke Motorcycle Race Engine by
Water Injection," SAE Paper No. 931506, Society of Automotive Engineers,
Warrendale, Pa., 1993.
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