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. 20, 2003
Filed:
Jul. 19, 2001
Christian Popp, Kressbronn, DE;
Hansjörg Rosi, Meckenbeuren, DE;
Klaus Steinhauser, Kressbronn, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of operating an automatic transmission of a motor vehicle having a hydraulic system, an electronic control unit connected with the hydraulic system and at least one engageable shifting element which is controlled according to a predetermined time-pressure profile. The method comprising the steps storing an associated profile representative of the operating point of the shifting element with regard to at least one of a filling ratio and a position of one piston of the shifting element. Thereafter, calculating an actual operating point of the shifting element via an algorithm stored in the electronic control unit. Finally, controlling the shifting element by the electronic control unit, via the hydraulic system, based on the calculated actual operating point of the shifting element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile