FLUID PRESSURE CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

摘要

A fluid pressure control device for an automatic transmission that transfers power from a motor via a friction engagement element, including: a first pump actuated by the power from the motor; a pressure regulator that regulates pressure of a working fluid pumped from the first pump; a first flow passage connected to an output port of the pressure regulator; a second flow passage connected to a fluid pressure chamber of the friction engagement element; a switcher that establishes and blocks connection between the first flow passage and the second flow passage; a second pump actuated by supply of electric power and capable of supplying the working fluid to the second flow passage with connection between the first flow passage and the second flow passage blocked by the switcher; and a pressure accumulator that accumulates pressure of the working fluid. The pressure accumulator is connected to the first flow passage.