Abstract: A wet multi-plate clutch includes a plate carrier with a pair of fluid passage openings and a friction plate rotationally fixed and axially displaceable relative to the plate carrier. The friction plate has a carrier element and a pair friction pads fastened to the carrier element and delimiting a groove. The groove includes a groove geometrical center line. The groove geometrical center line may extend radially through a one of the pair of fluid passage openings, or it may extend radially between the pair of fluid passage openings. If the groove geometrical center line extend radially between the pair of fluid passage openings, one of the pair of friction pads may include a pad geometrical center line extending along a radial extent through a one of the pair of fluid passage openings.

Abstract: A frictional surface for an annular wet friction system with external lubrication includes a groove pattern with first pentagonal friction lining pads, second pentagonal frictional lining pads, and a groove. The first pentagonal friction lining pads are arranged radially outwards in a first row and the second pentagonal friction lining pads arranged radially inwards in a second row. The groove extends circumferentially between the first pentagonal friction lining pads and the second pentagonal friction lining pads in a zigzag or undulating manner. In an embodiment, each of the first pentagonal friction lining pads has a triangular geometry with a first tip directed radially inwards and each of the second pentagonal friction lining pads has a triangular geometry with a second tip directed radially outwards.

Abstract: A wet multi-plate clutch includes a plate carrier with a pair of fluid passage openings and a friction plate rotationally fixed and axially displaceable relative to the plate carrier. The friction plate has a carrier element and a pair friction pads fastened to the carrier element and delimiting a groove. The groove includes a groove geometrical center line. The groove geometrical center line may extend radially through a one of the pair of fluid passage openings, or it may extend radially between the pair of fluid passage openings. If the groove geometrical center line extend radially between the pair of fluid passage openings, one of the pair of friction pads may include a pad geometrical center line extending along a radial extent through a one of the pair of fluid passage openings.