Device for varying the volumes of a first hydraulic machine and a second hydraulic machine

US9719531B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Jan-Frederik KUHN · Friedrichshafen, DE
• Timo Maise · Ludwigsburg, DE
• Marcus Hiemer · Karlsruhe, DE
• Stephan Schinacher · Egesheim, DE
• Sven Bieber · Markdorf, DE

Key dates

• Filing date: Jun 5, 2013
• Grant date: Aug 1, 2017
• Expiry date: Dec 30, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2059/6861
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device for varying the swept volumes of first and second hydraulic machines, whose swept volumes depends upon pivoting positions of adjustable axes thereof which can be connected to one another by first and second lines. The axes can be coupled to a piston-cylinder device which is adjustable by a control valve unit for pivoting the axes. Pressures in the area of the hydraulic machines can be limited by the control valve unit. The control valve unit can be coupled to a respective first or second line with the highest pressure. A device for determining an existing actual pressure is located upstream of the control valve unit, at least in the area of one of the first and the second lines that connects with the first and the second hydraulic machines. The control valve unit can be actuated based on the actual pressure value determined by the device.