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:
Aug. 20, 2002
Filed:
Aug. 02, 2000
Bernd Löffler, Ravensburg, DE;
Hans-Dieter Hengstler, Ravensburg, DE;
Joachim Cichy, Kressbronn, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
Within the scope of the process for variator slip treatment in continuously variable automatic transmissions of a motor vehicle, upon detection of variator slip, a characteristic field ( ) of slip meter is locally incremented according to ratio value (iv) and to engine torque (M_mot) and simultaneously an evaluated slip meter ( ) of an evaluation module ( ), likewise according to ratio value (iv) and to engine torque (M_mot), is increased, wherein via the evaluation module ( ), the variator slip is assessed according to duration and intensity. Besides, a characteristic field ( ) of slip status meter connected with the evaluated slip meter ( ) is incremented together with the evaluated slip meter ( ), a signal being passed on to an error memory ( ) so that, with the entry of the error, slip, evaluated slip and slip status meter are entered in the error memory ( ) as environmental conditions. Thereafter the contact pressure security is locally varied according to the characteristic field ( ) of the slip status meter.