HYDRAULIC TORQUE TRANSMISSION DEVICE

摘要

In a torque converter (1), an attachment angle of a turbine blade (41) at a turbine outlet that is a fluid outlet of a turbine runner (4) is made smaller than the attachment angle of the turbine blade (41) at a turbine inlet that is a fluid inlet of the turbine runner (4). A radius ro of an inscribed circle ICo that is inscribed on an outer contour line (41co) of the turbine blade (41) on a turbine shell (40) side and an inner contour line (41ci) of the turbine blade (41) on a turbine core (42) side at the turbine outlet is larger than a radius ri of an inscribed circle ICi that is inscribed on the outer contour line (41co) and the inner contour line (41ci) at the turbine inlet. The outer contour line (41co) of the turbine blade (41) extends outward in the extending direction of a rotation center axis (AC) on the turbine outlet side more than an outer contour line (31co) of a pump blade (31) on a pump shell (30) side.