| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a hydraulic oil supply amount to a transmission mechanism from becoming short when an electric motor-driven oil pump is abnormal. <P>SOLUTION: In an invented control method for an automatic transmission, the automatic transmission includes: a transmission mechanism having a plurality of friction fastening elements 10, 20, 70, 80 and 90 fastened or released by supplying or discharging hydraulic oil; a mechanical oil pump 111 driven by an engine to supply hydraulic oil to the transmission mechanism; and the electric motor-driven oil pump 112 driven by an electric motor 112a to supply hydraulic oil to the transmission mechanism. Here, when the motor-driven oil pump 112 is abnormal in a region for driving both of the mechanical pump 111 and the electric motor-driven oil pump 112, the hydraulic oil consumption amount of the transmission mechanism is reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
