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:
Dec. 08, 2015
Filed:
Mar. 20, 2012
Joerg Spranger, Gerlingen, DE;
Johannes Heusser, Ilsfeld, DE;
Julian Doerreich, Stuttgart, DE;
Stefan Mangold, Stuttgart, DE;
Martin Wirth, Paris, FR;
Joerg Spranger, Gerlingen, DE;
Johannes Heusser, Ilsfeld, DE;
Julian Doerreich, Stuttgart, DE;
Stefan Mangold, Stuttgart, DE;
Martin Wirth, Paris, FR;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method and a control unit, which makes it possible to reliably detect in an electric vehicle whether or not an electric machine is in a blocked state. For this purpose, a current rotational speed of the electric machine () is monitored using a control unit (). If a non-rotating state is detected, the electric machine () is actuated specifically for increasing a torque. The current rotational speed is further monitored, in particular for an increase of the current rotational speed of the electric machine, at least a short-term one, for tensioning a drive train () against a wheel () blocked due to external influences, for example. If this is not the case, it is assumed that the electric machine () is blocked, and a corresponding blocking signal is generated. If the electric machine () is detachably connected to the wheel () via a coupling (), it can be additionally provided that once the non-rotating state is detected, the coupling () is disengaged in order to see if the electric machine () will react to a request for an increased torque with an increased rotational speed, or if this does not happen due to a blocked electric machine.