Abstract: Systems and methods for a transmission. The transmission system includes, in one example, a dog clutch that is configured to selectively engage a first freewheeling gear that meshes with a first gear. The transmission system further includes an electromechanically or hydraulically actuated friction clutch configured to selectively engage a second freewheeling gear that meshes with a second gear. The transmission system even further includes a friction clutch disengagement device configured to inhibit actuation of the electromechanically or hydraulically actuated friction clutch in response to overrun of the first freewheeling gear.

Abstract: Systems and methods for a transmission. The transmission system includes, in one example, a dog clutch that is configured to selectively engage a first freewheeling gear that meshes with a first gear. The transmission system further includes an electromechanically or hydraulically actuated friction clutch configured to selectively engage a second freewheeling gear that meshes with a second gear. The transmission system even further includes a friction clutch disengagement device configured to inhibit actuation of the electromechanically or hydraulically actuated friction clutch in response to overrun of the first freewheeling gear.

Abstract: Electromagnetically-operated coupling device for selectively connecting and disconnecting a first rotating member and a second rotating member in a driveline of a vehicle is disclosed, wherein the first and the second rotating members are coaxial with each other and rotatable about a same axis of rotation. The coupling device comprises: an engagement sleeve provided with a control disk made of a ferromagnetic material, the engagement sleeve being axially slidable between an engaged position and a disengaged position; and a control system for controlling the sliding movement of the engagement sleeve between said engaged and disengaged positions. The control system comprises a pair of magnetic coils which are placed on opposite sides of the control disk, coaxially therewith, and are arranged to be selectively activated by an electric current to generate a magnetic force acting on the control disk to axially move the control disk, and therefore also the engagement sleeve, in either directions.

Abstract: Electromagnetically-operated coupling device for selectively connecting and disconnecting a first rotating member and a second rotating member in a driveline of a vehicle is disclosed, wherein the first and the second rotating members are coaxial with each other and rotatable about a same axis of rotation. The coupling device comprises: an engagement sleeve provided with a control disk made of a ferromagnetic material, the engagement sleeve being axially slidable between an engaged position and a disengaged position; and a control system for controlling the sliding movement of the engagement sleeve between said engaged and disengaged positions. The control system comprises a pair of magnetic coils which are placed on opposite sides of the control disk, coaxially therewith, and are arranged to be selectively activated by an electric current to generate a magnetic force acting on the control disk to axially move the control disk, and therefore also the engagement sleeve, in either directions.