Patent ID: 8567286
Filing Date: 2013-10-29
Classification: F16H,Y10T

Abstract:
1. A hydraulic control device for an automatic transmission, a plurality of frictional engagement elements being respectively provided so as to correspond to a plurality of driving force transmitting routes in the hydraulic control device, the hydraulic control device comprising a shift control section that carries out a shift control by switching the plurality of frictional engagement elements after selection of a gear to be selected next when to instruct gear shifting, the hydraulic control device comprising: a regulator valve adapted to regulate a line pressure from a hydraulic pressure applied from a hydraulic pressure supply source, the line pressure becoming a base oil pressure for operating the plurality of frictional engagement elements; a linear solenoid valve adapted to regulate the line pressure regulated by the regulator valve to a control hydraulic pressure in response to the shift control; an oil passage switching section adapted to switch oil passages to which the control hydraulic pressure is applied from the linear solenoid valve in order to switch gears among at least two gears including the gear to be selected; and a line pressure raising section adapted to raise the line pressure regulated by the regulator valve before switching into the gear to be selected, wherein the line pressure raising section is adapted to raise the line pressure based on at least one of a target shift-changing time and a required line pressure for the frictional engagement element corresponding to the gear.