| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hydraulic control device for an automatic transmission capable of appropriately lubricating a portion which requires lubrication with a simple structure. <P>SOLUTION: The hydraulic control device for an automatic transmission includes a line pressure regulating valve V13 for regulating the line pressure of a hydraulic oil discharged from an oil pump 10 and supplied to a hydraulic actuator, and a surplus oil circuit for supplying a surplus oil discharged in generating the line pressure by the line pressure regulating valve V13 to the lubrication portion. In the hydraulic control device, the line pressure regulating valve V13 includes a first port P23a that is opened even when a discharge amount of the oil pump 10 is smaller than a reference value and a second port P23b that is opened when the discharge amount is equal to or larger than the reference value. The surplus oil circuit includes a first circuit L19a communicating with the first port P23a and a second circuit L19b communicating with the second port P23b. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
