|
Answer» The following values are needed to be DETERMINED:
- Thickness of the cylinder wall: The cylinder walls in an ENGINE is made witness to gas pressure and the side thrust of a piston. This results in two types of stresses: longitudinal and circumferential stress. Both the types of stresses are perpendicular to each other and hence it is aimed to reduce the RESULTING stress as much as possible.
- Length and bore of the cylinder: The length of the cylinder and the length of the stroke is calculated on the basis of the formula: length of cylinder L = 1.15 times the length of the stroke (l). L = 1.15(l)
- Cylinder FLANGE and studs: The cylinders are always cast integral as a part of the upper crankcase or in some cases attached to it by means of nuts and bolts. The flange is integral to a cylinder and henceforth its thickness should be greater than that of the cylinder wall. The thickness of flange should generally be between 1.2t-1.4t where t is the cylinder thickness. The STUD diameter is calculated by equating gas load ( due to max pressure ) to the grand total of all the resisting forces of the studs.
The following values are needed to be determined:
|