| 摘要 |
PURPOSE: A manual valve of a hydraulic control system of an automatic transmission for a car is provided to prevent the damage of a friction element and a lowering of oscillation performance, and to gauge the quantity of oil of a transmission in "P" range by supplying hydraulic pressure with controlling line-pressure in "P" or "N" range for making sufficiently lubricating hydraulic pressure. CONSTITUTION: A manual valve of a hydraulic control system of an automatic transmission for a car comprises : a valve body to include the first port(100) connected with a line-pressure pipe, the second port(102) of "P" or "N" range, the third port(104) of "D" range, the fourth port(106) of "2" range, the fifth port(108) of "L" range, the sixth port(110) of "R" range, and the first and the second discharge ports(EX1, EX2) ; a valve spool(112) to convert the ports, and to include a connect port(114), the first land(116) and the second land(118) connecting the first port(100) with the second port(102) in "P" range, and the third land(120) connecting the first port(100) with the sixth port(110) in "R" range and connecting the first port(100) with the second, the third, the fourth, or the fifth port(102)(104)(106)(108) in "N", "D", "2", or "L" range in order. And all diameters of the lands are equal, and the thickness of the first land is thin than those of others.
|
