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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9664168 B1

PDFFull Text
Date of Patent:
May. 30, 2017

Filed:

Aug. 05, 2014

Hydrostatic power unit

Applicant:

Linde Hydraulics Gmbh & Co. KG, Aschaffenburg, DE;

Inventors:

Lukas Krittian, Aschaffenburg, DE;

Thomas Loeffler, Waldaschaff, DE;

Alfred Langen, Aschaffenburg, DE;

Rolf Lasaar, Grossostheim, DE;

Assignee:

Linde Hydraulics GmbH & Co. KG, Aschaffenburg, DE;

Attorney:

The Webb Law Firm

Primary Examiner:

Eric Keasel

Assistant Examiner:

Michael Quandt

Int. Cl.
CPC ...
F02N 7/08 (2006.01); F02N 7/00 (2006.01); F16H 61/42 (2010.01); F02B 73/00 (2006.01); F02N 9/04 (2006.01); F03C 1/00 (2006.01); F03C 1/26 (2006.01); F04B 13/00 (2006.01); F04B 17/05 (2006.01); F04B 49/12 (2006.01); B60K 6/12 (2006.01); F02N 11/08 (2006.01);
U.S. Cl.
CPC ...
F02N 7/08 (2013.01); B60K 6/12 (2013.01); F02B 73/00 (2013.01); F02N 7/00 (2013.01); F02N 9/04 (2013.01); F03C 1/005 (2013.01); F03C 1/26 (2013.01); F04B 13/00 (2013.01); F04B 17/05 (2013.01); F04B 49/12 (2013.01); F16H 61/42 (2013.01); B60K 2006/126 (2013.01); F02N 11/0814 (2013.01); Y02T 10/6208 (2013.01);
Abstract

A hydrostatic power unit () comprises a variable displacement machine with a continuously variable displacement volume and is operated as a pump and motor and is in a drive connection with an internal combustion engine (). When operated as a pump, the power unit sucks hydraulic fluid out of a tank () and delivers into a delivery side (P), and, when operated as a motor, functions as a hydraulic starter to start the internal combustion engine (). When operated as a motor, the power unit is supplied with hydraulic fluid from a hydraulic accumulator (). The displacement volume of the power unit () is set by a displacement volume control device () actuated by a positioning piston device () supplied with hydraulic fluid from a charging pressure circuit (). The power unit () includes a supplemental positioning piston device () in an operative connection with the displacement volume control device () and which is actuated directly by the pressure present in the hydraulic accumulator (). By means of a connection of the supplemental positioning piston device () with the hydraulic accumulator, the power unit () can be adjusted to increase the displacement volume to start the internal combustion engine ().

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