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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
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
Hot gases expand and force
Piston causes a
the piston down
electrode 1. Intake 2. Compression 3. Power 4. Exhaust, Screw
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
D = Bore of the cylinder in mm,
A = Cross-sectional area of the cylinder = × D2 mm2
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.
- Spring '11