b) the following data is given for the piston of a four-stroke diesel engine: Cylinder bore = 300 min Force on piston due to maximum gas pressure = 424 KN Bearing pressure at small end of connecting rod = 15 MPa Length of piston pin in bush of small end 0.45D Ratio of inner to outer diameter of piston pin = 0.6 Mean diameter of piston boss = 1.4 x outer diameter of piston pin Allowable bending stress for piston pin = 84 N/mm2 !! %3D %3D Calculate i. Outer diameter and inner diameter of the piston pin ii. Mean diameter of the piston boss; iii. The maximum gas pressures iv. check the design for bending stresses.

b) the following data is given for the piston of a four-stroke diesel engine: Cylinder bore = 300 min Force on piston due to maximum gas pressure = 424 KN Bearing pressure at small end of connecting rod = 15 MPa Length of piston pin in bush of small end 0.45D Ratio of inner to outer diameter of piston pin = 0.6 Mean diameter of piston boss = 1.4 x outer diameter of piston pin Allowable bending stress for piston pin = 84 N/mm2 !! %3D %3D Calculate i. Outer diameter and inner diameter of the piston pin ii. Mean diameter of the piston boss; iii. The maximum gas pressures iv. check the design for bending stresses.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

Question

b) the following data is given for the piston of a four-stroke diesel engine:
Cylinder bore 300 min
Force on piston due to maximum gas pressure = 424 KN
Bearing pressure at small end of connecting rod = 15 MPa
Length of piston pin in bush of small end = 0.45D
Ratio of inner to outer diameter of piston pin = 0.6
Mean diameter of piston boss = 1.4 x outer diameter of piston pin
Allowable bending stress for piston pin = 84 N/mm2
%3D
Calculate
i. Outer diameter and inner diameter of the piston pin
ii. Mean diameter of the piston boss;
iii. The maximum gas pressures
iv. check the design for bending stresses.

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