PURPOSE: To improve lockup response by arranging thrust bearings between an impeller hub and a turbine hub and forming a channel communicating with the inner and the outer periphery sides thereof in the opposite end face of the impeller hub or the turbine hub.
CONSTITUTION: Thrust bearings 18, 19 are arranged between an impeller hub 3 and a turbine hub 9, and a channel 38 communicating with the inner and the outer periphery sides thereof is formed in the opposite end face of the hub 3 or 9. Fluid which rises in temperature by heat generated in a fluid transmitting device passes through between the impeller and the turbine and between the impeller hub 3 and the turbine hub 9 and discharged to a transmission input shaft via the channel 38. Fluid for engaging and unengaging a lockup clutch piston flows via the channel 38 and therefore is smooth in movement. It is thus possible to obtain good lockup response and emit generated heat sufficiently.
KATO HIDEJI
MAEDA KOJI
HARA TAKESHI
