Patent · US Expired

Hydraulic torque converter

US6742638B2 · kind B2 · utility

8Cited by

7References

40Claims

0Family size

Assignee

LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

Stephan Maienschein · Baden-Baden, DE
Bruno Muller · Muhen, CH
Gunnar Back · Bühl, DE

Key dates

Filing date	Jul 11, 2002
Grant date	Jun 1, 2004
Priority date	—
Expiry date	Jul 11, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2045/0289
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Overheating of various parts of a hydraulic torque converter between the engine and the transmission of the power train in a motor vehicle, wherein the torque converter employs a bypass clutch which generates heat when it is operated with slip, is counteracted by establishing one or more paths for the flow of hydraulic converter fluid from a first plenum chamber at one side of the axially movable piston of the bypass clutch to a second plenum chamber. A first portion of each such path is defined by at least one groove in a friction surface of at least one part of the bypass clutch, and a second portion of each such path is defined by one or more throttling orifices which offers or offer to the fluid flow a resistance several times that of the groove(s).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.