Patent ID: 6447246
Filing Date: 2002-09-10
Classification: F16H

Abstract:
A torque converter wherein in an axial cross-section of a fluid flow path formed through an impeller member, a turbine member and a stator member which constitute said torque converter, a flatness (2L/H) and a torus inside and outside radius ration (r/R) which are defined based on a distance 2L between axial ends of said flow path, a maximum radius R, a minimum radius r and a difference H (=Râˆ’r) between said maximum radius R and said minimum radius r satisfy equations:0.550.35and wherein, in said axial cross-section, assuming that an axially central position of said flow path along a rotational shaft of said torque converter is an origin, an axial direction is an X direction and a radial direction is a Y direction, the configuration of said flow path is set such that the position of a point of contact between a straight line inclined 45degrees relative to said X direction and a curve constituting an external circumferential surface of said flow path in said turbine member is located with an area surrounded by: a first straight line expressed as Y=(R/L)Ã—X+(6/4)Ã—R, and a second straight line expressed as Y=(R/L)Ã—X+(7/4)Ã—R.