A design methodology is evolved and arrived at optimal configuration with respect to geometry for helical torsion spring for engine valve timing mechanism. Within the space constraint maximum working stress experienced by the spring should be within acceptable value. Optimal geometry is chozen for meeting this requirement. Two geometries (Round and square) are considered for carrying out the intended study. Outcome of the exercise is molded in a form that replicate a hand calculator for using which, designers need not possess expertise in any software. This GUI based software developed in MATLAB facilitates an 'exe' file which can be executed from any computer for which neither computer nor the designer should possess software. Working with this software will be as comfortable and similar to that of calculator in a typical computer. Using this software optimal design parameters of the intended spring are worked out. This software will be extremely useful for quickly arriving at optimal configuration for any combination of input design parameters. For running this software designer has to key in the input values in empty boxes corresponding input parameters. Maximum working stress values experienced by the helical torsion spring with round wire and square wire are compared with maximum allowable stress. In addition to this angular deflection values experienced by the spring with round and square wires are also compared. Based on these observations square wire is recommended for configuring helical torsion spring for engine valve timing mechanism.
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