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:
May. 19, 2015
Filed:
Mar. 09, 2011
Applicant:
David J Haugen, Ann Arbor, MI (US);
Inventor:
David J Haugen, Ann Arbor, MI (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 61/40 (2010.01); F16H 61/4096 (2010.01); B60K 6/12 (2006.01);
U.S. Cl.
CPC ...
F16H 61/4096 (2013.01); B60K 6/12 (2013.01); Y02T 10/6208 (2013.01);
Abstract
A shut off valve is configured to shut off flow from the high pressure fluid line to the high pressure accumulator in a series hydraulic hybrid vehicle in order to quickly raise system pressure in the high pressure fluid line and enable additional torque output from the hydraulic motor for vehicle propulsion. A pressure relief valve is further provided to vent excess flow from the high pressure line to the high pressure accumulator as needed to avoid exceeding a maximum desired system pressure in the high pressure fluid line, thereby providing for safe and efficient hydrostatic operation in the vehicle.