Function of the electromechanical lever actuator
| Item | Description |
|---|---|
| A | Clutches open Comments: Brushless DC clutch actuator motor de-energized |
| B | Clutch 2 closed Comments: Brushless DC clutch actuator motor energized |
| 1 | Brushless DC clutch actuator motor |
| 2 | Pressure spring |
| 3 | Ball screw drive |
| 4 | Rollers |
| 5 | Engagement lever |
When the DC clutch actuator motor is de-energized the clutch is open. In order to close the clutch, the DC clutch actuator motor is actuated by the TCM. As a result of the rotation of the ball screw, the roller is moved downwards via the recirculating ball nut. Due to this axial movement of the rollers, the central support point of the engaging lever is displaced, as a result of which the leverage is altered. The change in leverage in turn causes the force which acts via the engaging lever and the engaging bearing on the lever spring of the clutch to be increased. As a result, the engaging lever and the engaging bearing are lifted up. The engaging bearing presses against the lever spring and the clutch is pressed into the closed position.
In order to hold the clutch in the closed position, a holding current is applied to the DC clutch actuator motor.
As soon as the holding current is switched off by the TCM, the lever springs will slacken and the clutch will open. Through the release of the lever springs, the engaging bearing and the engaging lever are rotated back. When the engaging lever is rotated back, the shape of the engaging lever ensures that the rollers return to their starting position.