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Unformatted text preview: o stroke petrol engines are generally employed in very light vehicles such as scooters,
motor cycles and three wheelers. The two stroke diesel engines are generally employed in marine
The four stroke petrol engines are generally employed in light vehicles such as cars, jeeps and
also in aeroplanes. The four stroke diesel engines are generally employed in heavy duty vehicles such
as buses, trucks, tractors, diesel locomotive and in the earth moving machinery. 32.2 Principal Parts of an Engine
The principal parts of an I.C engine, as shown in Fig. 32.1 are as follows :
1. Cylinder and cylinder liner, 2. Piston, piston rings and piston pin or gudgeon pin, 3. Connecting
rod with small and big end bearing, 4. Crank, crankshaft and crank pin, and 5. Valve gear mechanism.
The design of the above mentioned principal parts are discussed, in detail, in the following
pages. Fig. 32.1. Internal combustion engine parts. 32.3 Cylinder and Cylinder Liner
The function of a cylinder is to retain the working fluid and to guide the piston. The cylin...
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This note was uploaded on 09/30/2012 for the course MECHANICAL 403 taught by Professor A.thirumoorthy during the Spring '11 term at Anna University Chennai - Regional Office, Coimbatore.
- Spring '11