| 摘要 |
PROBLEM TO BE SOLVED: To provide a gearshift device of an automatic transmission in which a desired gear shift gradient is attained while restraining efficiently idling of an engine in exchanging shifting-up gear shift when only one control element is given for two parameters. SOLUTION: There is provided the gearshift device of the automatic transmission including: a first oil path for supplying release oil pressure of a first friction element; a second oil path for supplying joint oil pressure of a second friction element; and a common oil path made in common so that the same oil operates. In the gearshift device of the automatic transmission, there are provided: an integral value calculating means for performing time-integration of a variation when actual gear ratio corresponding value of the automatic transmission has changed into a (n-1)th gear shift position; and a line pressure correction means for correcting line pressure at the time of the gear shift based on the integral value calculated above. COPYRIGHT: (C)2008,JPO&INPIT |
