Design Formulation and Optimization of Crankshaft Diameter for Single Cylinder 4-Stroke Diesel Engine

Abstract

Crankshaft is large volume production component with a complex geometry. It is a component of an engine which converts the reciprocating motion of the piston into the rotary motion of crank. An attempt is made in this paper to make design formulation for crankshaft of a single cylinder 4 stroke internal combustion engine and also optimize design parameters of same crankshaft. The high performance of engines greatly depends on the overall dimension of the engine itself of which crankshaft dominates considerably and also the lightweight design, component reliability and low through cost manufacturing. Formulation of single objective function is done for the minimization of diameter of crankshaft (ds) using three design variables, 1) diameter of crankpin, 2) length of crankpin, 3) web width. A genetic algorithm has been used for the optimum design of crankshaft.