| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manual valve of a hydraulic pressure control system for an automatic transmission capable of minimizing gear shift shock by controlling automatic transmission fluid discharged in R→N manual gearshift even in a very low temperature state, improving gearshift feeling, and preventing an accident that a frictional element release state occurs in an unprepared state. <P>SOLUTION: This manual valve of the hydraulic pressure control system for the automatic transmission includes a valve body including an input port and two reverse range pressure supply ports for supplying a hydraulic pressure from the input port to two friction elements in reverse gearshift, and a valve spool disposed in the valve body, connected to a select lever at a driver's seat, and converting a flow channel according to a gearshift range, and at least one exhaust passage is formed on a land of the valve spool opening and closing the two reverse range pressure supply ports. <P>COPYRIGHT: (C)2007,JPO&INPIT |
