Patent ID: 6328674
Filing Date: 2001-12-11
Classification: B60Y,F16D,F16H,Y10T

Abstract:
A clutch pressure control apparatus of a transmission having a pressure control valve which supplies a discharge oil in a hydraulic pump to a clutch chamber at a time of engaging a clutch, whereby the clutch chamber is filled with the discharge oil, gradually increases a hydraulic pressure in the clutch chamber after it is filled so as to engage the clutch, and drains the oil in the clutch chamber to a tank at a time of disengaging the clutch, wherein said apparatus comprises:a supply bypass valve which directly supplies the discharge oil of the hydraulic pump to the clutch chamber by bypassing the pressure control valve at a time of engaging the clutch; anda discharge bypass valve which directly drains the oil in the clutch chamber to the tank by bypassing the pressure control valve at a time of disengaging the clutch.