Fluid transmission device

Abstract

In a fluid transmission device which includes a pump, a turbine (6 in FIG. 2), and a direct coupling clutch (10) having a damper function; the turbine (6) being a member which is located downstream of the damper function and which does not contribute to torque transmission under the operating state of the direct coupling clutch (10) is resiliently supported by an inner damper spring (46) being an elastic body, so that the turbine (6) is utilized as a damper weight which affects the dynamic balance of the damper function. Thus, the direct-connectible region of the direct coupling clutch of the fluid transmission device is expanded toward the lower vehicle speed range of a motor vehicle so as to enhance the fuel consumption of the motor vehicle, without worsening the oscillation characteristics of the device.

Dependencies are inferred from the claim text.