Patent ID: 6568515
Filing Date: 2003-05-27
Classification: B60W,F16D,F16H,Y10T

Abstract:
A hydraulic actuation system for an automated transmission system including an active clutch comprises:a hydraulic clutch actuator for controlling engagement of an active clutch; a gear engagement actuator for controlling engagement of a gear; a source of hydraulic fluid under pressure; a hydraulic fluid reservoir; a main control valve for selectively connecting the hydraulic clutch actuator and the gear engagement actuator to the source of hydraulic fluid under pressure or to the reservoir; and an isolation valve for isolating the gear engagement actuator from the main control valve, when the clutch actuator is connected to the source of hydraulic fluid under pressure; the clutch actuator causing the clutch to engage when connected to the source of hydraulic fluid under pressure and causing the clutch to disengage when connected to the reservoir.