Borgwarner Inc.

Thad Kopp

Larry A Pritchard

Philip John Francis

Mark Buchanan

Keith V Feldt

Tsunlock A Yu

Peizhang Tu

A disconnect mechanism for a secondary driveline and method of assembly can be used in an all-wheel drive (AWD) vehicle having a rear driveline module (RDM) for changing drive modes between a two-wheel drive mode and an AWD mode. The disconnect mechanism can include a hydraulically actuated coupling clutch connected to a power take-off unit (PTU) for transferring rotary power from the PTU to the RDM during the AWD mode, a hydraulically actuated first and second rear clutch for rotationally connecting and disconnecting corresponding first and second rear axles drivingly coupled to rear wheels during the AWD mode and two-wheel drive mode, respectively, and a hydraulic actuating assembly including a source of pressurized fluid for actuating the coupling clutch, the first rear clutch, and the second rear clutch, and for synchronizing any speed differential therebetween.

All-wheel drive disconnect with independent drive

A hydraulic actuation system () and method of assembly for disconnecting a secondary driveline () can be used in an all-wheel drive (AWD) vehicle () having a power take-off unit (PTU) () for transferring rotary power to the secondary driveline (). The hydraulic actuation system () can include a source of pressurized fluid (), a hydraulically actuated synchronizer () for synchronizing rotary motion between the PTU () and the secondary driveline (), at least one hydraulically actuated clutch assembly () for connecting and disconnecting secondary vehicle wheels () with respect to the secondary driveline (), an area control solenoid (ACS) valve () in fluid communication with the source of pressurized fluid () to modulate pressure to engage and disengage the synchronizer (), and at least one variable force solenoid (VFS) valve () in fluid communication with the source of pressurized fluid () to modulate pressure to the at least one hydraulically actuated clutch assembly ().

Hydraulic system for a driveline disconnect with independent drive rear driveline module

A hydraulic clutch assembly for a motor vehicle driveline is provided. The clutch assembly comprises an input member, and output member and a friction clutch pack operably disposed therebetween for controlling torque transfer. A first fluid circuit contains hydraulic based fluid at a first pressure and is in fluid communication with the friction clutch pack for lubrication thereof. A second fluid circuit is in fluid communication with the first fluid circuit for replenishing the second fluid circuit with the hydraulic based fluid at a second pressure that is less than the first pressure. The clutch assembly further comprises a motor and a gear train. A first piston is in fluid communication with the second fluid circuit for delivering the hydraulic based fluid thereto A second piston is translated by the hydraulic based fluid displaced by the first piston to actuate the friction clutch pack.

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Oakland Township, MI, United States of America

Thad Kopp