Turbocharging the Internal Combustion Engine

The turbocharger was invented a surprisingly long time ago but only relatively recently has it been an accepted component on all but very small diesel engines. After several false starts they are now also being used on petrol engines. Unlike most other components of an engine, the turbocharger can radically transform the performance of the engine and is therefore very much a critical component.

As a result more engineers need to understand how and why it does what it does. The characteristics of turbomachines are fundamentally different from those of reciprocating machines, hence the combination of turbocharger and engine has many complex characteristics. Yet engineers with diesel or petrol engine experience have little knowledge of turbomachines, and vice versa, and are therefore not well equipped to optimise the combination.

 This book is an attempt to help these engineers by explaining the principles of turbocharging, with special emphasis on the interactions between engine and turbocharger. Many examples of the current practice of turbocharging are also given to explain how the principles can be used to advantage.

 Although examples relating to large industrial and marine engines are not omitted, preference has deliberately been given to examples of practice on automotive (truck-type) diesel engines for several reasons. Firstly turbocharging is longer established on marine and industrial engines and hence the principles are better known in that industry. Secondly engine designers, development engineers and users who are new to turbocharging are mainly involved with truck and passenger car diesel engines.

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