Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.

Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.

Abstract: A friction plate for a wet clutch includes a core plate, and friction members bonded to opposite sides of the plate core. The friction member is provided with a plurality of first oil grooves each permitting the communication between inner and outer circumferential edges of the friction member, and a plurality of second oil grooves each permitting the communication between intermediate portions of the adjacent first oil grooves. The first oil grooves are disposed in such a manner that they are inclined at a given angle in a circumferential direction of the core plate with respect to a line of radius passing through a radially inner end of each first oil groove. The second oil grooves are disposed in such a manner that they are inclined in the same direction as the first oil grooves at an acute angle larger than the given angle with respect to a line of radius passing through a radially inner end of each second oil groove. Thus, the cooling property is enhanced, and the dragging torque is decreased.