SHIFT CONTROL METHOD OF AUTOMATIC TRANSMISSION CLUTCH BY USING PERCENT TORQUE CAPACITY

摘要

PURPOSE: A shift control method of an automatic transmission clutch using a percent torque capacity is provided to improve shift feeling, by predicting the movement of each clutch in the shift accurately. CONSTITUTION: A base percent torque capacity(100) and a slope percent torque capacity(120) are added. The percent torque capacity is calculated. Clutch torque is calculated from the added percent torque capacity and engine input torque(140). Clutch pressure is calculated from data or relation equation between torque and pressure from the calculated clutch torque. A control current value is calculated from the clutch pressure and pressure-current relation data. [Reference numerals] (100) Percent torque capacity( BASE); (120) Percent torque capacity(GRADIENT); (140) Engine input torque; (160) Relation between torque and pressure(formula or data); (180) Relation between pressure and current(data); (AA) Percent torque volume; (BB) Clutch torque; (CC) Clutch pressure; (DD) Control current