Hydrostatic power unit as hydraulic starter of an internal combustion engine

US9709046B2 · kind B2 · utility

Assignee

• Linde Hydraulics GmbH & Co. KG · DE

Inventors

• Lukas Krittian · Aschaffenburg, DE
• Martin Steigerwald · Herzogenaurach, DE
• Martin Oberhausser · Aschaffenburg, DE
• Alfred Langen · Goldbach, DE

Key dates

• Filing date: Nov 18, 2013
• Grant date: Jul 18, 2017
• Expiry date: Jan 16, 2035

Classification

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

Abstract

A variable displacement hydrostatic power unit (7) is in a drive connection with an internal combustion engine (2). When operated as a pump, the power unit (7) delivers hydraulic fluid to at least one consumer (V). When operated as a motor, the power unit (7) is a hydraulic starter for the internal combustion engine (2) and is supplied with hydraulic fluid from a hydraulic accumulator (25). The displacement volume of the power unit (7) is set by a displacement volume control device (50) actuated by a positioning device (52). The displacement volume control device (50) is displaced into a position with maximum displacement volume by a corresponding actuation of the positioning device (52) chronologically prior to the shutoff of the internal combustion engine (2). A securing device (60) holds the displacement volume control device (50) in the maximum displacement volume position when the internal combustion engine (2) is shut off.