| 摘要 |
PROBLEM TO BE SOLVED: To effectively cool a clutch of each gear shift stage group without interfering with control of reduction in lubricating oil quantity of a pre-shift clutch. SOLUTION: A total clutch lubricating oil quantity Qtotal is set to be a maximum oil quantity corresponding to the clutch temperature Tc1. Over a period of time elapsed from t1 at which N range is selected to t2 at which D range is selected, a pre-shift to a first speed of an odd-numbered gear shift stage group is performed (reduction of Nc1), and a pre-shift to a second speed of an even-numbered gear shift stage group by a second speed shift operation of a 2-4 coupling sleeve is performed (referring to reduction of Nc2). Since the total clutch lubricating oil quantity Qtotal is the maximum oil quantity and the lubricating oil quantity Qc2 of the even-numbered gear shift stage clutch is large so that the pre-shift to the second speed cannot be performed due to dragging torque, the total clutch lubricating oil quantity Qtotal is reduced so that the dragging torque may not interfere with the pre-shift to the second speed. When an accelerator is pushed down for starting a vehicle at t3 so as to increase an engine speed Ne, slip fastening of the odd-numbered gear shift stage clutch is started from t4 and the vehicle can be started as clearly understood from increase of Nc1. COPYRIGHT: (C)2009,JPO&INPIT |
