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. 24, 2002
Filed:
Apr. 13, 2001
Applicant:
Inventors:
Assignee:
ZF Friedrichshafen AG, Friedrichshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 6/102 ; F16D 4/806 ;
U.S. Cl.
CPC ...
F16H 6/102 ; F16D 4/806 ;
Abstract
A method and device for a coupling ( ) in a motor vehicle, transmission ( ) are proposed in which the coupling is controlled and regulated during three operational states via a first regulating circuit ( ). The regulated quantity corresponds to the actual value of a differential rotational speed of the coupling ( ). The first state corresponds to a starting operation, the second state to the operation with constant ratio and the third state exists when a gear shift under load or a change of ratio from a first to a second ratio step of an automatic transmission ( ) is initiated.