Patent ID: 6440028
Filing Date: 2002-08-27
Classification: F15B,F16H

Abstract:
A manual valve of a hydraulic pressure control system for an automatic transmission, comprising:a valve body which is provided with a first port communicated with a regulator valve via a pressure line, a second port connected to a first pressure control valve and a second fail safe valve so as to supply hydraulic pressure thereto at range â€œPâ€ , a third port connected to the regulator valve, an N-R control valve, and first and second switch valves so as to supply the hydraulic pressure from the first port thereto at range â€œRâ€ , a fourth port connected to second and third pressure control valves and the first and second switch valves so as to supply the hydraulic pressure from the first valve thereto at ranges â€œ2â€ , â€œ3â€ , and â€œDâ€ , a fifth port connected to the first switch valve so as to supply the hydraulic pressure from the first port thereto at range â€œLâ€ ; and a valve spool slidably inserted into the valve body so as to selectively communicate the first port to at least one other port.