Unformatted text preview: ylinder is 5 N/mm2 at a speed of 3500 r.p.m. The cylinder diameter is required to be 300 mm with
stroke 1.5 times the diameter. The piston may have 4 compression rings and an oil ring. The following
data can be used for design: 1212 n A Textbook of Machine Design Higher calorific value of fuel = 46 × 103kJ/kg; Temperature at the piston centre = 700 K; Tempressure
at the piston edge = 475 K; Heat conductivity factor = 46.6 W/m/K; Heat conducted through top = 5%
of heat produced; Permissible tensile strength for the material of piston = 27 N/mm2; Pressure
between rings and piston = 0.04 N/mm2; Permissible tensile stress in rings = 80 N/mm2; Permissible
Pressure on piston barrel = 0.4 N/mm2; Permissible pressure on piston pin = 15 N/mm2; Permissible
stress in piston pin = 85 N/mm2.
Any other data required for the design may be assumed.
4. Determine the dimensions of an I-section connecting rod for a petrol engine from the following data:
Diameter of the piston = 110 mm; Mass of the reciprocating parts = 2 kg; Length of the connecting
View Full Document
- Spring '11
- Combustion, Internal combustion engine, pistons, Connecting rod, Engine technology, piston pin