Oil Pressure Control Apparatus

摘要

An oil pressure control apparatus includes a control valve mechanism (4) being in communication with a pump (1) via a first fluid passage (11A) and being in communication with a control apparatus (2) via a second fluid passage (12B), a third fluid passage (13) diverging from the first fluid passage to supply oil to a predetermined portion (7) other than the control apparatus, and a fluid passage dimension regulating mechanism (3) including a movable member (31) provided at the third fluid passage and including an opening (31 a) for regulating a fluid passage dimension of the third fluid passage. The fluid passage dimension regulating mechanism is in communication with a fourth fluid passage (14) diverging from the second fluid passage and biases the movable member to a side increasing the fluid passage dimension by applying the hydraulic pressure of the fourth fluid passage to the movable member separately from the hydraulic pressure of the third fluid passage.