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:
Oct. 24, 2023
Filed:
Aug. 22, 2019
Robert Bosch Gmbh, Stuttgart, DE;
Klaus Ries-Mueller, Bad Rappenau, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for ascertaining the backlash () of a gear () which is coupled to an electric machine () of a vehicle which has at least one electric machine (). According to the method, at least the following steps are carried out: a) detecting the rotational speed of the at least one electric machine () during a driving intervention () and detecting rotational speed fluctuations produced therefrom, b) evaluating a high-frequency vibration () which is generated as a result of the gear () reaching a lower stop () in delay phases () and reaching an upper stop () when reversing the rotational direction in acceleration phases (), c) filtering out high-frequency components from the high-frequency vibration () according to step b), wherein position information (), relating to a corresponding rotational angle, from the rotational speed signal is saved in the event said components occur, and d) evaluating the distance between the upper stop () and the lower stop () and ascertaining the backlash () from the difference of the position information () between the upper stop () and the lower stop ().