Torque converter

摘要

A torque converter of the present invention includes a pump impeller, a turbine impeller, a first stator impeller, a second stator impeller, a first one-way clutch annularly provided on the inner periphery of the first stator impeller, and a second one-way clutch annularly provided from the inner periphery of the first one-way clutch to the inner periphery of the second stator impeller. The first stator impeller is coupled to a fixed shaft via the first and second one-way clutches, and the second stator impeller is coupled to the fixed shaft only via the second one-way clutch.

主权项

1. A torque converter, comprising:
a pump impeller coupled to an input shaft and defining a flow passage for a working fluid flowing from a radially inner side toward a radially outer side by a plurality of blades arranged at predetermined intervals in a circumferential direction about the input shaft; a turbine impeller coupled to an output shaft and defining a flow passage for the working fluid flowing from a radially outer side toward a radially inner side by a plurality of blades arranged at predetermined intervals in the circumferential direction about the output shaft to be opposed to the pump impeller; a first stator impeller provided between the pump impeller and the turbine impeller, defining a flow passage for the working fluid flowing back from the radially inner side of the turbine impeller to the radially inner side of the pump impeller by a plurality of blades arranged at predetermined intervals in the circumferential direction about a fixed shaft concentric with the input shaft and the output shaft, and provided on the turbine impeller side; a second stator impeller provided between the pump impeller and the turbine impeller, defining a flow passage for the working fluid flowing back from the radially inner side of the turbine impeller to the radially inner side of the pump impeller by a plurality of blades arranged at predetermined intervals in the circumferential direction about the fixed shaft concentric with the input shaft and the output shaft, and provided on the pump impeller side; a first one-way clutch annularly provided on the inner periphery of the first stator impeller and configured to restrict a rotational direction of the first stator impeller only to a predetermined one direction; and a second one-way clutch annularly provided from the inner periphery of the first one-way clutch to the inner periphery of the second stator impeller and configured to restrict a rotational direction of the second stator impeller only to a predetermined one direction; the first stator impeller being coupled to the fixed shaft via the first and second one-way clutches and the second stator impeller being coupled to the fixed shaft only via the second one-way clutch.