| 摘要 |
A hydraulic actuation system for an automated transmission system includes; a hydraulic fluid accumulator (275), a hydraulic fluid reservoir (278), a clutch slave cylinder 22 and gear engagement select and shift actuators (114, 115); the clutch slave cylinder (22) and select and shift actuators (114, 115) are selectively connected to the accumulator (275) or to the reservoir (278) via a main control solenoid valve (120); a further clutch control solenoid valve (122) being connected between the main control valve (120) and the clutch slave cylinder (22), the clutch control valve (122) being switchable between a open position in which slave cylinder (22) is connected to the main control valve (120) and a closed position in which the clutch slave cylinder (22) is isolated from the main control valve (120); the working chambers (118, 119) of the select and shift actuators (114, 115) being selectively connected to the main control valve (120) or to the reservoir (278) via gear control solenoid valves (144, 145, 146, 147). |
