281 Copyright Goodheart-Willcox Co., Inc. After studying this chapter, you will be able to: • Explain the purpose of exhaust systems used on diesel engines. • List the main components of a typical exhaust system. • Name some of the more common diesel engine emission controls. • Explain the purpose of an EGR system. • Explain the purpose of a diesel after treatment system. • Define back pressure and describe its effect on the exhaust system. • Understand the precautions that must be taken when routing exhaust pipes. • Describe the parts and operation of a turbocharger. • Explain the purpose of charge air coolers. • Identify the causes of turbocharger failure. • Explain the operation of an exhaust pyrometer. Exhaust Systems Technical Terms back pressure compressor wheel crossover tube dispersive mufflers dry mufflers exhaust brake exhaust manifold exhaust manifold gasket exhaust pyrometers exhaust risers exhaust system horizontal mufflers muffler oil lag reactive mufflers resonator slip joints turbine housing turbine wheel turbochargers vertical muffler waste gate wet mufflers Chapter 13