Apparatus for cooling clutches on a transmission shaft

US6059682A · kind A · utility

Assignee

• LuK Getriebe-Systeme GmbH · DE

Inventors

• Oswald Friedmann · Lichtenau, DE
• Hans-Peter Fleischmann · Stammham, DE
• Thomas Suchandt · Ingolstadt, DE
• Johann Märkl · Nassenfels, DE

Key dates

• Filing date: Jan 21, 1998
• Grant date: May 9, 2000
• Expiry date: Jan 21, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H57/0489
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A change-speed transmission in the power train of a motor vehicle has a planetary gearing and coaxial radially inner and outer disc clutches, namely a direct clutch and a reverse clutch. At least that clutch which is engaged (i.e., in use) is cooled by a lubricant for the planetary gearing, and the flow of coolant to the clutches is regulated by the axially movable pressure plate of one of the clutches. A jet pump conveys lubricant from the sump in the transmission case into an axially extending channel of the input shaft of the transmission, and such channel forms part of a system of passages which supply coolant at least to that clutch which is then in use to transmit torque from the input shaft to an output element of the transmission.