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:
Sep. 23, 2014
Filed:
Nov. 07, 2012
Robert Bosch Gmbh, Stuttgart, DE;
Charles Moore, Broadview, IL (US);
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A drive system for a hybrid hydraulic vehicle. The drive system includes an engine, a hydraulic pump driven by the engine, a converter coupled to the pump, a drive train coupled to the converter a first hydraulic pathway coupling the hydraulic pump to the converter, a second hydraulic pathway coupling the hydraulic pump to the converter, a reservoir positioned in the second hydraulic pathway, an accumulator positioned in the first hydraulic pathway, a pressure sensor configured to sense the pressure of hydraulic fluid in the accumulator, and a controller. The controller is configured to receive an indication of the pressure of the hydraulic fluid in the accumulator from the pressure sensor, and to adjust a low pressure level threshold of the pressure of hydraulic fluid in the accumulator based on the operation of the vehicle such that the pressure of the hydraulic fluid in the accumulator reaches a predetermined target pressure when the vehicle brakes.