5 d the pitch circle diameter dp is usually taken as

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Unformatted text preview: 19 d to 28.5 d . The pitch circle diameter (Dp) is usually taken as D + 3d. The studs or bolts are designed in the same way as discussed above. Example 32.1. A four stroke diesel engine has the following specifications : Brake power = 5 kW ; Speed = 1200 r.p.m. ; Indicated mean effective pressure = 0.35 N / mm 2 ; Mechanical efficiency = 80 %. Determine : 1. bore and length of the cylinder ; 2. thickness of the cylinder head ; and 3. size of studs for the cylinder head. Inlet valve 4-Stroke Petrol Engine Ignition system Hot gases expand and force Spark plug Piston causes a the piston down spark Exhaust Crankshaft valve Terminal Ceramic insulator Spark plug casing Central electrode 1. Intake 2. Compression 3. Power 4. Exhaust, Screw fitting Earth electrode 5. Spark plug Internal Combustion Engine Parts n 1131 Solution. G iven: B .P. = 5 kW = 5000 W ; N = 1 200 r.p.m. or n = N / 2 = 600 ; pm = 0.35 N/mm2; ηm = 80% = 0.8 1. Bore and length of cylinder Let D = Bore of the cylinder in mm, π A = Cross-sectional area of the cylinder = × D2 mm2 4 l = Length of the stroke...
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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.

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