Patent ID: 6464054
Filing Date: 2002-10-15
Classification: F16H,Y10T

Abstract:
A hydraulic torque transmitting device that uses a fluid to transmit torque, said hydraulic torque transmitting device comprising:a front cover configured to receive an input torque; a torus including an impeller that forms a fluid working chamber with said front cover, and a turbine disposed opposite to said impeller within said fluid working chamber; and a lockup device disposed between said front cover and said turbine, and said lockup device including a clutch part arranged to mechanically couple said front cover with said turbine, and a damper part arranged to attenuate torsional vibration, said turbine being configured with a linearly shaped part axially aligned with said damper part in the vicinity of an outlet, said linearly shaped part including a tapered surface facing toward said damper part, said tapered surface being formed by a turbine shell of said turbine, and a ratio (S/D) of a length S of said tapered surface in the radial direction to an outer radius D of said torus being in a range of about 0.09 to about 0.19.