Gear Shift Quality Parameters Optimization for Critical to Quality Dimensions

Gear Shift Quality (GSQ) in passenger cars is one of the sensitive touch points, which has a direct effect on driver fatigue and drivability. In the following article, an attempt has been made to study the variance in Critical to Quality (CTQ) dimensions and their influence on GSQ parameters. CTQ matrix that shows relation between CTQ parameters and GSQ parameters is formed and is analyzed to study process capability. Impact of variance in CTQs on GSQ parameters is studied and finally has resulted into

1. a
   Tolerance revision
2. b
   Removal of C of C symbol from drawing wherever is required

In an automobile transmission, the driver’s comfort of smooth shifting and selection of gears is a major concern for the transmission designer. Apart from smoother shifting and selection of gears while driving, the overall gearshift quality is also important for the transmission designer, which has a direct impact on customer delight. In the following article, an attempt has been made to develop a precise methodology in which critical parameters impacting Gear Shift Quality are identified, categorization of those parameters, data matrix development and Gearshift quality data capture on vehicle with sophisticated instrument setup. In addition, these CTQs are analyzed with statistical tools to assure consistency in GSQ.