Constant Pressure Turbocharging

Abstract

The basic objective of turbocharging is simply stated: to supercharge the engine using the energy of the exhaust gases to drive a compressor via a turbine. A considerable fraction of the energy released by combustion of the fuel/air mixture in any engine is lost through the exhaust system (30 to 40 per cent). In the design of a turbocharging system it is of the utmost importance to utilise the exhaust gas energy leaving the engine and arriving at the turbocharger turbine to full advantage. Two principal systems have been briefly introduced in chapter 1. In this chapter the constant pressure (or ‘single-pipe’) system will be considered in detail, together with a discussion of its application to two-stroke and four-stroke engines designed for various duties.