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.:
Date of Patent:
Nov. 10, 2015
Filed:
Mar. 21, 2011
Frank Bauer, Marpingen, DE;
Herbert Baltes, Losheim, DE;
Peter Kloft, Ransbach-Baumbach, DE;
HYDAC TECHNOLOGY GMBH, Sulzbach/Saar, DE;
Abstract
A hydrostatic hybrid drive system for road vehicles includes a pump/motor unit () connected to the powertrain of the vehicle, controlled by a control unit () in a pump or motor operation, and connected to a high-pressure hydraulic accumulator via a first working line (). The first working line can be closed by a control valve () and connected to a low-pressure hydraulic accumulator via a second working line (). The high-pressure hydraulic accumulator and low-pressure hydraulic accumulator are formed by a double-piston accumulator (), in which a high-pressure side and a low-pressure side having respective accumulator pistons () are formed in an accumulator housing (). The fluid chambers () of the high-pressure side and the low-pressure side are separated by a central housing part () through which the common piston rod for both accumulator pistons () extends. The control unit () of the pump/motor unit () having a control area can be supplied from the first working line () via a line connection () provided on the first working line () between the pump/motor unit () and the control valve ().