Patent ID: 9746074
Date: 2017-08-29
CPC Classifications: B60W,F16D,F16H

Claim:
1. A vehicle transmission apparatus, wherein: a starting engagement friction element, which has friction plates and a hydraulic servo including a piston that is moved according to a supplied oil pressure to press the friction plates, which is placed on a transmission path between an internal combustion engine and wheels, which is controlled to be engaged when a vehicle is started by using at least a driving force of the internal combustion engine, and which transfers creep torque that allows the vehicle to creep before the piston reaches a stroke end position; and a control device capable of receiving an accelerator operation amount signal and capable of outputting a command value that controls the oil pressure, wherein when the accelerator operation amount signal is turned on from a state where the accelerator operation amount signal is off and the command value is outputted so that a position of the piston is between a disengaged position, in which the starting engagement friction element is brought into a disengaged state, and the stroke end position in order to transfer the creep torque by the starting engagement friction element, the control device executes temporary increase control of temporarily increasing the command value to a first predetermined value so that the piston is pressed and driven to the stroke end position from the position between the disengaged position, in which the starting engagement friction element is brought into the disengaged state, and the stroke end position; and after a predetermined time, the control device decreases the command value to a second predetermined value; and the first predetermined value is determined based on a creep standby time.