Hydrodynamic converter with a bridging coupling

US5549184A · kind A · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Alfons Loffler · Friedrichshafen, DE
• Josef Schwarz · Augsburg, DE

Key dates

• Filing date: Jan 18, 1995
• Grant date: Aug 27, 1996
• Expiry date: Jan 18, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/14
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A bridging coupling is actuated by an annular piston to which the converter's internal pressure is applied on one side thereof in an opening direction and a closing pressure is applied in the closing direction. The closing pressure is controlled by a precontrolled regulating valve depending on the output pressure of the converter and on a control pressure that depends upon further operating parameters. With the coupling open, the closing pressure in the closing pressure chamber remains below the internal pressure of the converter by a specified value. This ensures that the bridging coupling responds quickly and can be precisely regulated within narrow tolerances. In addition, only relatively little power is needed for the regulation.