Unformatted text preview: The thickness of the cylinder wall (t) may also be obtained from the
following empirical relation, i.e.
t = 0.045 D + 1.6 mm
The other empirical relations are as follows :
Thickness of the dry liner
= 0.03 D to 0.035 D Internal Combustion Engine Parts n 1129 Thickness of the water jacket wall
= 0.032 D + 1.6 mm or t / 3 m for bigger cylinders and 3t /4 for
Water space between the outer cylinder wall and inner jacket wall
= 10 mm for a 75 mm cylinder to 75 mm for a 750 mm cylinder
or 0.08 D + 6.5 mm
2. Bore and length of the cylinder. The bore (i.e. inner diameter) and length of the cylinder may
be determined as discussed below :
pm = Indicated mean effective pressure in N/mm2,
D = Cylinder bore in mm,
A = Cross-sectional area of the cylinder in mm2,
= π D2/4
l = Length of stroke in metres,
N = Speed of the engine in r.p.m., and
n = Number of working strokes per min
= N, for two stroke engine
= N/2, for four stroke engine.
We know that the power produced inside the engine cylinder, i.e....
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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