Basic Mechanical Engineering

6

Internal Combustion Engines

Chapter Objectives

In this chapter, you will learn about:

• IC engine and its classification
• Classification of IC engines
• Constructional details and working of SI and CI engines
• Two-stroke and four-stroke engines
• Valve timing diagrams
• Thermodynamic cycles: Otto, diesel and dual cycles
• Testing and performance of IC engines

6.1  INTRODUCTION

“The heat engine, in which the combustion takes place inside the cylinder or the product of combustion (flue gas) directly goes to the cylinder and the heat energy of the flue gas is converted into mechanical energy, is known as Internal Combustion Engine (IC Engine).” The combustion may take place either inside or outside the cylinder, but heat energy of the combustion is ...