A connecting rod is to be designed for a high speed I.C. Engine. The data available are: Diameter of piston $=90 \mathrm{~mm}$, mass of reciprocating parts $=1.5 \mathrm{~kg}$, length of connecting rod-centre to centre $=350 \mathrm{~mm}$, stroke $=140 \mathrm{~mm}, \mathrm{rpm}=2200$, (when developing 55 kW , possible over speed $=3000 \mathrm{rpm}$, compression ratio $6.8: 1$ approximately), probable maximum explosion pressure (assumed shortly after dead centre say $3^{\circ}$ ) $=3 \mathrm{~N} / \mathrm{mm}^{2}$. Draw a fully dimensioned drawing of the connecting rod showing the provision for lubrication.

Explanation

The design of a connecting rod involves calculating the length of the connecting rod, the diameter of the connecting rod, and the thickness of the connecting rod. The length of the connecting rod can be calculated using the formula: L = √(L^2 + (R^2 - r^2)) where L is the length of the connecting rod, R is the radius of the crank, and r is the radius of the piston. The diameter of the connecting rod can be calculated using the formula: D = √(4 \* A / π) where A is the area of the connecting rod. The thickness of the connecting rod can be calculated using the formula: t = √(4 \* A / π) where A is the area of the connecting rod.

Explanation

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