Abstract: A power transmission apparatus has an input member rotated by an engine output. First and second clutch sections, respectively, have a plurality of driving clutch discs and a plurality of driven clutch discs. Each driving and driven clutch disc being alternately arranged. First and second output shafts are rotated by driving force transmitted from the first and second clutch sections. Transmission members transmit the driving force from the first and second clutch sections, respectively, to the first and second output shafts. A selecting mechanism selectively presses or separates the driving clutch discs and driven clutch discs, respectively, of the first and second clutch sections against each other. The first and second clutch sections are coaxially arranged with the first and second shafts. The transmission members extend from either side of a group of the first and second clutch sections to the first and second output shafts. The selecting mechanism is arranged between the transmission members.

Abstract: A power transmission apparatus has an input member rotated by an engine output. First and second clutch sections, respectively, have a plurality of driving clutch discs and a plurality of driven clutch discs. Each driving and driven clutch disc being alternately arranged. First and second output shafts are rotated by driving force transmitted from the first and second clutch sections. Transmission members transmit the driving force from the first and second clutch sections, respectively, to the first and second output shafts. A selecting mechanism selectively presses or separates the driving clutch discs and driven clutch discs, respectively, of the first and second clutch sections against each other.

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.