An electronically controlled driveline and axle coupling in on-demand and full-time all wheel drive vehicles. Current supplied to an electro-magnet generates a magnetic field causing the armature to compress the pilot clutch. The resulting pilot clutch drag generates a rotational torque across a bi-directional ball-ramp mechanism. This rotational force causes the balls to roll up the opposing ramps which pushes the front cam forward. The cam thrust is transmitted through the pressure plate compressing the main clutch. The rotational torque from the outer plates (input) is then transferred to the inner plates (output) proportional to the electrical current. An Electronic Control Unit (ECU) controls the clutch torque by adjusting the amount of current based on available vehicle inputs and control algorithm.
An electronic control unit (ECU) is an embedded system that controls one or more of the electrical subsystems in a vehicle.
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An electronically controlled selectable lock-up differential actuated by an Electronic Control Unit (ECU). One side gear (driven cam) is interconnected to the differential case by the drive cam (dog tooth clutch). An electro magnetic actuator pushes the drive cam into the driven cam. The opposing dog tooth profiles engage and directly lock the side gear to the differential case. The specific interface geometry between the Drive Cam and Differential case assures a dog tooth engagement under all loads. In the locked position, both left and right wheels are locked to the differential case. In the open position, the differential is free to differentiate (open or LSD type).
An electronically controlled axle and driveline coupling for on-demand and full-time all wheel drive vehicles. Current supplied to an electric-motor connected to a reduction gear directly rotates the cam gear of a unidirectional ball-ramp mechanism. This rotational torque causes the balls to roll up the opposing ramps which pushes the front cam forward. The cam thrust is transmitted through the pressure disc compressing the clutch. The rotational torque from the outer plates (input) is then transferred to the inner plates (output) proportional to the electrical current. An Electronic Control Unit (ECU) controls the clutch torque by adjusting the amount of current based on available vehicle inputs and control algorithm.
An Electronic Torque Manager positioned in the front or rear axle of a vehicle to control the torque distribution between the left and right wheels of the vehicle.
An Electronic Torque Manager positioned in the centre of a vehicle driveline to control the torque distribution between the front and rear of a vehicle.
An Electronic Torque Vectoring System allows individual wheel torque distribution. The ETV uses the driving torque to generate a YAW-moment in the vehicle to enhance vehicle stability, agility and traction at the same time.
Electronically controlled couplings or limited slip differentials use vehicle sensor signals processed in an ECU to control driveline torque flow.