Drive system, in particular for a self-propelled construction machine, in particular a soil compactor

US9995007B2 · kind B2 · utility

Assignee

• Hamm AG · DE

Inventors

• Andreas Rohr · Idar-Oberstein, DE
• Thomas Henker · Tirschenreuth, DE
• Ronny Pieske · Zwönitz, DE

Key dates

• Filing date: Dec 17, 2014
• Grant date: Jun 12, 2018
• Expiry date: Sep 21, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A drive system, in particular for a self-propelled construction machine, in particular a soil compactor, comprises a drive unit, at least one hydraulic circuit with a hydraulic pump driven by the drive unit, a hydraulic drive support unit with a hydraulic pump/motor assembly, and at least one pressure fluid reservoir, wherein the hydraulic pump/motor assembly is, or can be, drivingly coupled with the drive unit and/or at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode by the drive unit and/or at least one hydraulic circuit as a pump to charge at least one pressure fluid reservoir, and be driven in a drive support operating mode as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, characterized in that the hydraulic pump/motor assembly is operated in a recirculation operating mode as a pump to convey fluid out of a fluid reservoir and into a fluid reservoir.