The purpose of this study was to reduce the tuning time of the transmission shift feeling of an off-road dump truck. Recently, the clutch engagement timing of most off-road trucks is electronically controlled according to the acceleration of the engine or driving conditions to obtain a more comfortable shift feeling. In the tuning of an actual vehicle, however, it takes a long time to filld the optimum control parameters for the clutch pressure. In this study, parameter design was used to find optimum parameters that would give a good shift feeling consistently and with high robustness. The calculations in this study were carried out by a combination of in-house dynamic simulation software and iSIGHT. It was confirmed that the tuning time of an actual vehicle could be reduced to half the current tuning time with the optimum parameters obtained as a result of this parameter design study.
