Control means for a drive system with impressed pressure

US4688380A · kind A · utility

Assignee

• Mannesmann Rexroth AG · DE

Inventors

• Peter Reinhardt · San Francisco, US
• Heinrich Nikolaus · Hamburg, DE
• Frank Metzner · Hamburg, DE

Key dates

• Filing date: Aug 4, 1986
• Grant date: Aug 25, 1987
• Expiry date: Aug 4, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/444
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A secondarily controlled hydrostatic machine with variable volume is connected to a line with impressed system pressure which is fed by a primary unit. By switching over the primary unit the secondary unit is subjected to a displacement amount which results in as large as possible a pivot angle of the secondary unit to obtain the highest possible efficiency. The switching over takes place in dependence upon an upper and lower switching point corresponding to the desired pivot angle range of the secondary unit.