The Control of the Clutch Half Joint for AMT Truck in the Starting Process Based on Load Identification

The accurate determination of the position of the clutch half joint is of great importance for controlling the automatic transmission. Due to the great change of truck load, the location of half joint is significantly affected by the mass factors. Consequently, the clutch half joint needs to be controlled according to the change of the load. The truck load was identified by the deformation of the truck’s leaf spring measured by displacement sensors. Meanwhile, the locations of the clutch half joint under different load conditions were calibrated by platform experiment. The calibrated half joints were determined based on the truck load and rectified successively using the coefficient K in the practical operation to approximate real half joint. The real vehicle tests demonstrated that controlling a clutch by considering the influence of the weight change on half joint can shorten starting time and improve the engagement quality of the clutch.