| 摘要 |
<P>PROBLEM TO BE SOLVED: To further improve control property of an automatic transmission by precisely driving a solenoid valve even when acceleration is applied to a vehicle with respect to moving direction of a valve of the solenoid valve. <P>SOLUTION: In the automatic transmission having a linear solenoid arranged so that a spool moves in the right and left direction of the vehicle, right and left acceleration (a) of the vehicle is calculated based on wheel velocities Vr, Vl (S310), and an acceleration correction value Pacc is set based on the calculated right and left acceleration (a) (S320). During gear shift, a hydraulic pressure command with the set acceleration correction value Pacc added thereto is set and, based on the set hydraulic pressure command, the corresponding linear solenoid valve is driven and controlled. As a result, irrespective of a running state (right and left acceleration) of the vehicle, right amount of hydraulic pressure to be applied to an hydraulic pressure chamber of a clutch or a brake can be obtained, and the control property of the automatic transmission can be improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
