摘要:
A torque transfer mechanism having a multi-plate friction clutch connecting a pair of rotary members and a electrohydraulic clutch actuator for controlling engagement of the friction clutch. The clutch actuator includes a hydraulic pump, a hydraulically-actuated rotary operator, and a thrust mechanism. The hydraulic pump draws low pressure fluid from a sump and selectively delivers high pressure fluid to a series of actuation chambers and return chambers defined between coaxially aligned first and second components of the rotary operator. The magnitude of the fluid pressure delivered to the actuation chamber controls angular movement of the second component relative to the first component for energizing the thrust mechanism. The thrust mechanism applies a clutch engagement force on the friction clutch, thereby transferring drive torque from the first rotary member to the second rotary member. An electrohydraulic control system regulates the fluid pressure delivered to the actuation and return chambers.
摘要:
A torque transfer mechanism (22) having a transfer clutch (50) connecting a pair of rotary members (32,42) and a electrohydraulic clutch actuator (52) for controlling engagement of the transfer clutch (52). The clutch actuator (52) includes a hydraulic pump (158) and a hydraulically-actuated rotary operator (152). The hydraulic pump (158) draws low pressure fluid from a sump (200) and delivers high pressure fluid to a series of actuation chambers (182) defined between coaxially aligned first (160) and second (162) components of the rotary operator (152). The magnitude of the fluid pressure delivered to the actuation chamber (182) controls angular movement of the second component (162) relative to the first component (160) for energizing a pilot ball ramp unit (84). The pilot ball ramp mechanism (84) applies a clutch actuation force on a pilot friction clutch (76) which energized a main ball ramp unit (80) for applying a clutch engagement force to a main friction clutch (78). A hydraulic control system adaptively regulates the fluid pressure delivered to the actuation chamber (182).
摘要:
A torque transfer mechanism having a multi-plate friction clutch connecting a pair of rotary members and a electrohydraulic clutch actuator for controlling engagement of the friction clutch. The clutch actuator includes a hydraulic pump, a hydraulically-actuated rotary operator, and a ball ramp mechanism. The hydraulic pump draws low pressure fluid from a sump and delivers high pressure fluid to a series of actuation chambers defined between coaxially aligned first and second components of the rotary operator. The magnitude of the fluid pressure delivered to the actuation chamber controls angular movement of the second component relative to the first component for energizing the ball ramp mechanism. The ball ramp mechanism applies a clutch engagement force on the friction clutch assembly, thereby transferring drive torque from the first rotary member to the second rotary member. A hydraulic control system adaptively regulates the fluid pressure delivered to the actuation chamber.
摘要:
A drive axle assembly includes first and second axleshafts connected to a pair of wheels and a drive mechanism operable to selectively couple a driven input shaft to one or both of the axleshafts. The drive mechanism includes a differential, a speed changing unit operably disposed between the differential assembly and one of the first and second axleshafts, and first and second mode clutches. The first mode clutch is operable to engage the speed changing unit for reducing the rotary speed of the second axleshaft relative to the rotary speed of the first axleshaft. The second mode clutch is operable to engage the speed changing unit for increasing the rotary speed of the second axleshaft relative to the rotary speed of the first axleshaft. A control system controls actuation of both mode clutches.
摘要:
A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a second rotary member. The torque transfer mechanism includes a power-operated face gear clutch actuator for generating and applying a clutch engagement force on the clutch assembly.
摘要:
A torque transfer mechanism (22) having a multi-plate friction clutch (80) connecting a pair of rotary members (32,42) and a electrohydraulic clutch actuator (52) for controlling engagement of the friction clutch (80). The clutch actuator includes a hydraulic pump (122), a hydraulically-actuated rotary operator (124), and a ball ramp mechanism (126). The hydraulic pump (122) draws low pressure fluid from a sump (200) and delivers high pressure fluid to a series of actuation chambers (162) defined between coaxially aligned first (132) and second (134) components of the rotary operator (124). The magnitude of the fluid pressure delivered to the actuation chamber (162) controls angular movement of the second component (134) relative to the first component (132) for energizing the ball ramp mechanism (126). The ball ramp mechanism (126) applies a clutch engagement force on the friction clutch assembly (80), thereby transferring drive torque from the first rotary member (32) to the second rotary member (42). A hydraulic control system adaptively regulates the fluid pressure delivered to the actuation chamber (162).