Abstract: A power transmission device includes a torque converter device, a first hydraulic pump, a first oil channel, a second oil channel, a third oil channel, a second pressure control valve, and a controller. The torque converter device has a torque converter and a lock-up clutch. The first oil channel supplies hydraulic fluid from the first hydraulic pump to the torque converter. The second oil channel drains hydraulic fluid from the torque converter. The third oil channel communicates with the first oil channel and the second oil channel. The second pressure control valve is disposed in the third oil channel. The controller sets the second pressure control valve to an open state when the lock-up clutch is in an engaged state.

Abstract: A power transmission device includes a torque converter device, a first hydraulic pump, a first oil channel, a second oil channel, a third oil channel, a second pressure control valve, and a controller. The torque converter device has a torque converter and a lock-up clutch. The first oil channel supplies hydraulic fluid from the first hydraulic pump to the torque converter. The second oil channel drains hydraulic fluid from the torque converter. The third oil channel communicates with the first oil channel and the second oil channel. The second pressure control valve is disposed in the third oil channel. The controller sets the second pressure control valve to an open state when the lock-up clutch is in an engaged state.

Abstract: Provided are: a package that is capable of transporting a composite material without generating fluff by suppressing shedding of carbon fibers from the composite material while holding the composite material at a fixed position during transportation; and a method for manufacturing the package. This package is prepared by stacking a composite material in the form of a plurality of plates on a mounting stand having a plurality of fitting holes, wherein: the composite material includes carbon fibers and a thermoplastic resin; the composite material is held by a plurality of holding members detachably attached to the fitting holes; of the contact surfaces of the composite material and the holding members, one of the contact surfaces of either the composite material or the holding members is curved, and the other contact surface is flat or curved.

Abstract: Provided are: a package that is capable of transporting a composite material without generating fluff by suppressing shedding of carbon fibers from the composite material while holding the composite material at a fixed position during transportation; and a method for manufacturing the package. This package is prepared by stacking a composite material in the form of a plurality of plates on a mounting stand having a plurality of fitting holes, wherein: the composite material includes carbon fibers and a thermoplastic resin; the composite material is held by a plurality of holding members detachably attached to the fitting holes; of the contact surfaces of the composite material and the holding members, one of the contact surfaces of either the composite material or the holding members is curved, and the other contact surface is flat or curved.

Abstract: It is an object to provide a process and an apparatus which allow stable production of ultrashort-cut fibers having fiber lengths of no greater than 0.1 mm while minimizing miscutting, the object being achieved by a process and apparatus whereby numerous individual filament groups are bound to form a fiber bundle, an embedding material which is solidified by cooling and gasified or liquefied by heating is gasified or liquefied, the fiber bundle is embedded with the gasified or liquefied embedding material, and the edge of the embedded fiber bundle is thinly shaved at a temperature at which the embedding material does not gasify or liquefy, to obtain ultrashort-cut fibers having cut fiber lengths of no greater than 1.0 mm.