| 摘要 |
A vehicle driveline clutch using a ball ramp actuator (2) using a ball ramp mechanism (5) supplying a clamping force on a clutch disc (10,11) in response to an electromagnetic field where the clutch clamping force is maintained and increased with clutch slip using a planetary gearset (21) having an annulus (40) connected to rotate with the flywheel (4) and a sun gear (54) connected to rotate with the transmission input shaft (8). A primary one-way clutch (60) acts between the planetary gearset (21) and the flywheel (4) work in conjunction with the planetary gearset (21) in preventing rotation of the control ring (14) in a direction to deactivate the ball ramp mechanism (5) and a plurality of secondary one-way clutches (44A, 44B, 44C, 44D) acting in a pair of planetary gearsets (21) with a one-way clutch (44A, 44B, 44C, 44D) acting on each planet gear (42A, 42B, 42C, 42D) and supported on a carrier ring (35) which is frictionally connected to a ball ramp control ring (14) upon energization by a clutch control unit (15) of an electrical coil (30) thereby creating relative rotational motion between the control ring (14) and an actuation ring (12) causing a plurality of rotational elements to travel along identical opposed variable depth ramps (22A, 22B, 22C, 23A, 23B, 23C) thereby creating an axial separation force between the control ring (14) and the actuation ring (12) generating the clamping force on the clutch disc (10,11). Upon slippage of the clutch disc (10,11), the planetary gearset (21) act in concert with the primary one-way clutch (60) act to further energize the ball ramp actuator (2) to increase the clutch clamping force when the vehicle is in either a drive or coast driving mode. <IMAGE> |
