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:
Jun. 19, 2007
Filed:
Jul. 01, 2004
Chris Teslak, Plymouth, MI (US);
Cliff Carlson, Fenton, MI (US);
Ron Kepner, Ann Arbor, MI (US);
Chuanchi Tang, Troy, MI (US);
Chris Teslak, Plymouth, MI (US);
Cliff Carlson, Fenton, MI (US);
Ron Kepner, Ann Arbor, MI (US);
Chuanchi Tang, Troy, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system for braking the wheels of a hydraulic hybrid vehicle includes a brake pedal having a range of pedal displacement including a deadband displacement range, an accumulator containing fluid at relatively high pressure, a reservoir containing fluid at lower pressure, a pump/motor having variable volumetric displacement connected to the accumulator and reservoir, and driveably connected to the wheels; a system responsive to brake pedal displacement in the deadband range for placing the pump/motor in a pump state wherein the pump/motor is driven by the wheels and pumps fluid from the reservoir to the accumulator; and a control valve for changing the volumetric displacement of the pump/motor in response to displacement of the brake pedal.