Patent ID: 7454902
Filing Date: 2008-11-25
Classification: F16H

Abstract:
1. A torque converter to transmit torque by fluid, comprising: a front cover being configured to receive torque; an impeller forming a fluid chamber with said front cover and including an impeller shell and a plurality of impeller blades fixed to said impeller shell; a turbine being located facing said impeller within said fluid chamber, including a turbine shell and a plurality of turbine blades fixed to said turbine shell; and a stator being located between said impeller and said turbine to adjust the flow of the fluid from said turbine to said impeller, said impeller, said turbine, and said stator constituting a torus, flattening L/D1 being less than or equal to 0.18 in said torus, wherein D1 is an outer diameter and L is an axial direction length, a surface of said impeller shell on which said impeller blades are fixed having an impeller straight portion showing a straight line in a cross section, and a surface of said turbine shell on which said turbine blades are fixed having a turbine straight portion showing a straight line in a cross section, and a ratio St/L being in the range between 0.1 and 0.7, L being an axial direction length of said torus and St being a length of said turbine straight portion.