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Unformatted text preview: ke I.C. engine. The following
data are available.
Diameter of piston = 88 mm; Mass of reciprocating parts = 1.6 kg; Length of connecting rod (centre to
centre) = 300 mm; Stroke = 125 mm; R.P.M. = 2200 (when developing 50 kW); Possible overspeed =
3000 r.p.m.; Compression ratio = 6.8 : 1 (approximately); Probale maximum explosion pressure
(assumed shortly after dead centre, say at about 3°) = 3.5 N/mm2.
Draw fully dimensioned drawings of the connecting rod showing the provision for the lubrication.
7. Design a plain carbon steel centre crankshaft for a single acting four stroke, single cylinder engine for
the following data:
Piston diameter = 250 mm; Stroke = 400 mm; Maximum combustion pressure = 2.5 N/mm2; Weight
of the flywheel = 16 kN; Total belt pull = 3 N; Length of connecting rod = 950 mm.
When the crank has turned through 30° from top dead centre, the pressure on the piston is 1 N/mm2
and the torque on the crank is maximum.
Any other data required for the design may be assumed.
8. Design a side crankshaft for a 500 mm...
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- Spring '11