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11R40. Theory of Engine Manifold Design: Wave Action Methods for IC Engineers. - DE Winterbone (Dept of Mech Eng, UMIST, Manchester, UK) and RJ Pearson. SAE, Warrendale PA. 2000. 476 pp. ISBN 0-7680-0656-2.

Reviewed by MS Qatu (Ford Motor Co, EVB Bldg, MD X8, 20800 Oakwood Blvd, Dearborn MI 48124) and S Siavoshani (Eng and Res Center, Ford Motor Co, EVB Bldg, MD X8, 20800 Oakwood Blvd, Dearborn MI 48124).

This is one of a very limited number of books on the subject. The special attention to sound quality and fuel economy in automotive engineering necessitated this special effort.

The book is made up of eight chapters. The first chapter is an introduction. It covers the history of studying waves, fundamentals of one-dimensional unsteady flow dynamics, and boundary conditions. The second chapter covers the governing equations for both viscous fluids and inviscid ones. The equations of conservation of mass (continuity), energy, momentum for conservative systems, as well as those for non-conservative systems are covered. Discussion of multi-dimensional viscous and inviscid flows is also carried out.

Chapter 3 focuses on numerical methods used in wave mechanics. In particular, the methods of characteristics, Lax-Wendroff, CIR, Courant-Friedrichs-Lewy and other techniques are covered. Chapter 4 presents the variation in modeling of gas properties and 2D simulation of wave propagation.

Chapter 5 solves simple problems of open and closed boundaries in simple pipes. The chapter also treats throttle valves, fuel injection, and carburetors. Sudden area changes (enlargement or contraction) are treated in the next chapter, which also covers multi-pipe junctions, pulse converter junctions, and other components.

Chapter 7 discusses turbo charging components including turbines, centrifugal compressors, charge coolers, and others. The last chapter covers the application of wave mechanics in the design of engine manifolds. It covers interesting case studies for typical four-stroke automotive engines, automotive diesel engines, and other turbocharger engines.

The book, Theory of Engine Manifold Design, is an excellent reference for both academia and industry. It has a vast variety of examples and explanation concerning both induction and exhaust manifold design. This book can be used for both undergraduate and graduate university students. There are several aspects of the engine manifold design. The most important of all are the engine tuning and the acoustic performance which has been described in the Design Techniques for Engine Manifold written by the same authors.

The current book, Theory of Engine Manifold Design describes the fundamental physics and mathematics of the design, as well as provides some applications concerning the design of intake manifolds for multi-cylinder engines. It also describes the numerical methods in solving different wave propagation in depth. While the Design Techniques for Engine Manifolds provides both analytical and experimental understanding of the gas dynamics, the Theory of Engine Manifold Design provides more in-depth theoretical background. Using a combination of both books is recommended.

The success of any automotive product is based on several factors. The engine performance, fuel economy, and its noise and vibration are among the important ones. In these cases, the manifold design for both induction and exhaust can provide that lead for noise and performance. Both books provide automotive engineers with a good reference for gaining enough knowledge to bring them to the level of understanding the fundamental concepts of engine noise and performance due to the intake and exhaust manifold design. The Theory of Engine Manifold Design is highly recommended for the industrial and academic communities.