Power train with infinitely variable ratio transmission

US5725447A · kind A · utility

Assignee

• LuK Getriebe-Systeme GmbH · DE

Inventors

• Oswald Friedmann · Lichtenau, DE
• Urban Panther · Nassau (Lahn), DE
• Ivo Agner · Bogen, DE

Key dates

• Filing date: Dec 14, 1995
• Grant date: Mar 10, 1998
• Expiry date: Dec 14, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0253
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A torque transmitting power train for use in a motor vehicle employs a transmission with two adjustable pulleys and an endless flexible element trained over the pulleys. The pulleys are adjustable by a torque sensor and primary hydraulic adjusting units in dependency upon the magnitude of transmitted torque, as well as by an adjustable selecting valve and secondary hydraulic adjusting units in dependency upon the desired or required transmission ratio. The primary and secondary adjusting units can receive a pressurized hydraulic fluid from a common source.