| 摘要 |
PROBLEM TO BE SOLVED: To prevent wrong fastening of a starting friction fastening element in an idle stop state of an engine, and improve responsiveness at start of a vehicle while suppressing electric power consumption.SOLUTION: A hydraulic control device for an automatic transmission includes: a gap adjustment hydraulic chamber 64 to which hydraulic pressure for reducing a clutch clearance of a friction fastening element 60 fastened at start is supplied; a fastening hydraulic chamber 65 to which hydraulic pressure for fastening the friction fastening element 60 is supplied; a first oil passage 141 for supplying hydraulic pressure generated by an electric oil pump 106 to the gap adjustment hydraulic chamber 64; a hydraulic control valve 102 to which original pressure is supplied through an original pressure supply oil passage 143 branched from the first oil passage 141; and a second oil passage 142 for supplying hydraulic pressure controlled by the hydraulic control valve 102 to the fastening hydraulic chamber 65.SELECTED DRAWING: Figure 6 |
