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:
Jul. 07, 2011
Morgan Postic, Osthouse, FR;
Marc Rambert, Strasbourg, FR;
Eric Dalais, Strasbourg, FR;
Emmanuel Hoff, Plobsheim, FR;
Nathaniel Wilke, Waterford, MI (US);
Morgan Postic, Osthouse, FR;
Marc Rambert, Strasbourg, FR;
Eric Dalais, Strasbourg, FR;
Emmanuel Hoff, Plobsheim, FR;
Nathaniel Wilke, Waterford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
At least a method is provided learning a characteristic filling volume of a hydraulic clutch. The method includes, but is not limited to applying a pressure pulse to the hydraulic clutch when the clutch is in a disengaged state and determining an inflection event at an input or at an output of a torque path in which the hydraulic clutch is situated. A characteristic filling volume of the hydraulic clutch is derived from the determined inflection event. Furthermore, a method is provided for learning a characteristic return spring pressure of the hydraulic clutch, for engaging the hydraulic clutch and corresponding devices for carrying out these methods.