This preview shows page 1. Sign up to view the full content.
Unformatted text preview: (i) and (ii), the length of the piston skirt (l) is determined. In actual practice, the
length of the piston skirt is taken as 0.65 to 0.8 times the cylinder bore. Now the total length of the
piston (L) is given by
L = Length of skirt + Length of ring section + Top land
The length of the piston usually varies between D and 1.5 D. It may be noted that a longer piston
provides better bearing surface for quiet running of the engine, but it should not be made unnecessarily
long as it will increase its own mass and thus the inertia
forces. 32.12 Piston Pin
The piston pin (also called gudgeon pin or wrist pin)
is used to connect the piston and the connecting rod. It is
Fig.32.5. Piston pin.
usually made hollow and tapered on the inside, the smallest
inside diameter being at the centre of the pin, as shown in Fig. 32.5. The piston pin passes through the
bosses provided on the inside of the piston skirt and the bush of the small end of the connecting rod.
The centre of piston pin should be 0.02 D to 0.04 D above the centre of the skirt, in order to off...
View Full Document
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