| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic control apparatus for a vehicle transmission which allows hydraulic oil discharged from a first output port of an oil pump device to flow into an oil path having lower pressure than that of a line oil path while an oil pump rotates at low speed. <P>SOLUTION: When a spool valve element 164 is positioned on a side for reducing relief amount of the hydraulic oil in a first line oil path 156, a first valve V1 provided in a first pressure regulating valve 160 opens between the first output port 144 and a lubricating unit (low-pressure oil path) 172 having lower pressure than that of the first line oil path 156, so as to guide the hydraulic oil discharged from the first output port 144 to the lubricating unit 172 through the first valve V1. Accordingly, when the oil pump device 28 rotates at a low speed and the amount of hydraulic oil used in the first line oil path 156 is small, for example, in a vehicle stop state, a drive torque of the oil pump device 28 is reduced, thereby improving fuel economy of the vehicle. <P>COPYRIGHT: (C)2013,JPO&INPIT |
