摘要:
A transfer case for a motor vehicle having an input shaft, a first output shaft, a second output shaft, a clutch, a transfer mechanism, a sensor portion and a magnetoelastic torque sensor. The clutch has a clutch pack and a thrust mechanism that is configured to exert an engagement force on the clutch pack. The clutch pack has a first portion, which is rotatably driven by either or both of the input shaft and the first output shaft, and a second portion that is supported for rotation relative to the first portion. The transfer mechanism couples the second portion of the clutch pack to the second output shaft. The sensor portion is coupled to the first or second output shaft and is at least partially formed of a magnetoelastic material. The magnetoelastic torque sensor is disposed about and radially in-line with the sensor portion.
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 clutch actuator assembly for generating and applying a clutch engagement force on the clutch assembly. The clutch actuator assembly includes an electric motor/brake unit, a torque/force conversion mechanism, and a force amplification mechanism. The motor/brake unit can be operated in either of a motor mode or a brake mode to cause bi-directional linear movement of an output member of the torque/force conversion mechanism. The thrust force generated by the torque/force conversion mechanism is increased by the force amplification mechanism with the resultant clutch engagement force applied to the clutch assembly. The dual mode feature of the electric motor/brake unit significantly reduces the power requirements.
摘要:
A multi-speed transmission includes a first power transmission module driven by an input shaft. A second power transmission module is driven by the first power transmission module. A third power transmission module is driven by the second power transmission module and drives an output shaft. Each power transmission module includes an actuation mechanism and a planetary gearset. Each actuation mechanism controls the output of its respective planetary gearset to one of a first gear ratio and a second gear ratio. One of the actuation mechanisms includes a clutch and a spring biasing a member to rotate and cause a corresponding actuation of the clutch. The clutch causes two members of the respective planetary gearset to rotate at substantially the same speed and provide the first gear ratio. The actuation mechanism selectively restricts the member from rotating and prevent actuation of the clutch to provide the second gear ratio.
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 clutch actuator assembly for generating and applying a clutch engagement force on the clutch assembly. The clutch actuator assembly includes an electric motor/brake unit and a torque/force conversion mechanism. The motor/brake unit can be operated in either of a motor mode or a brake mode to cause bi-directional linear movement of an output member of the torque/force conversion mechanism. The thrust force generated by the torque/force conversion mechanism is applied to the clutch assembly. The dual mode feature of the electric motor/brake unit significantly reduces the power requirements. A torque vectoring drive axle is equipped with a pair of such torque transfer mechanisms.
摘要:
A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.
摘要:
A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.
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 clutch actuator assembly for generating and applying a clutch engagement force on the clutch assembly. The clutch actuator assembly includes an electric motor/brake unit, a torque/force conversion mechanism, and a force amplification mechanism. The motor/brake unit can be operated in either of a motor mode or a brake mode to cause bi-directional linear movement of an output member of the torque/force conversion mechanism. The thrust force generated by the torque/force conversion mechanism is increased by the force amplification mechanism with the resultant clutch engagement force applied to the clutch assembly. The dual mode feature of the electric motor/brake unit significantly reduces the power requirements.
摘要:
A drive speed control system having an input shaft and an output shaft in communication with a planetary gear mechanism. The planetary gear mechanism is in communication with a first rotatable drum member and a second rotatable drum member which is positioned radially inward relative to the first rotatable drum member. A first annular inflatable member is positioned radially outwardly of the first rotatable drum member and a second annular inflatable member is positioned radially between the first and second rotatable drum members. The first and second annular inflatable members are in communication with a control system to cause the inflation of the first annular inflatable member to inhibit rotation of the first rotatable drum member and to cause inflation of the second annular inflatable member, when the first annular inflatable member is uninflated, to cause the first rotatable drum member to rotate in unison with the second rotatable drum.
摘要:
A torque converter has a continuous slip bypass clutch with multiple friction plates one of which is directly coupled to the inside diameter of the front cover of the torque converter and another of which is directly coupled to a hub connected to the output shaft of the converter and wherein the bypass clutch is activated when there is excessive torque converter slip so as to engage plural friction surfaces on the multiple friction plates for providing a heat resistant slip connection between the front cover and the output shaft.
摘要:
A torsion damper (10) for damping vibration between the input member and put member of a hydrodynamic converter (12) includes a lock-up plate (30) which is axially moveable in response to differential hydraulic pressure thereacross to be directly coupled to or released from the input member; a variable volume liquid filled damping chamber (62) is connected to the inboard surface of the lock-up plate and is comprised of three separate, slidably supported rings (40) for forming part of the damping chamber. A cam ring (48) is directly connected to the output member and a stopper ring (42) is connected to the lock-up plate; a follower ring (50) includes cam followers that engage cam surfaces on the cam ring and further includes lock segments thereon that engage a spring diaphragm (60) which seals the damping chamber and which is shifted by the follower ring upon relative rotation between the input member and the output member to vary the volume of the variable volume chamber; the torsion damper includes orifices (68) and a relief valve (72) on the lock-up plate for controlling flow into and from the damping chamber to impose a vibration damping force between the input and output member partly in accordance with the size of the orifices; partly in accordance with the shape of the cam surface on the cam ring and partly in accordance with the spring rate of the spring diaphragm any one of which can be adjusted for tuning the torsional damping rates of the torsion damper.