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:
Feb. 20, 2018
Filed:
Jul. 29, 2016
Zf Friedrichshafen Ag, Friedrichschafen, DE;
Tomas Szabo, Ravensburg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of optimizing shifting of a shifting element which fixes a shaft to another component of the drive-train. Three shifting processes are influenced by respective characteristic forms of a control parameter. The first and second characteristic forms are different from one another. Each shifting process has a distinct start and end time (t, t). The rotational speed of the shaft is a function n(t) of time t. An idealized rotational speed n(t):=G{n(t)} is determined by a filter G. First and second evaluation indexes I:=I(t−Δ,t)/I (t−, t) are calculated, in which t<t≦t. I(t, t) is a measure of a deviation of the rotational speed n(t) from the idealized rotational speed n(t) over time [t,t]. The third characteristic form is chosen based on the first and second evaluation indexes I.