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:
Apr. 13, 2004
Filed:
Sep. 06, 2002
Notker Amann, Friedrichshafen, DE;
Joachim Boecker, Berlin, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In the present method for damping the torque oscillations of the drive train of an electrically driven road vehicle, the torque or a torque estimated value and the rotational speed of the electric motor which drives the road vehicle as well as the rotational speed of a wheel or the mean value of the rotational speeds of all the driven wheels of the road vehicle are detected as input variables, an observer estimating, from the input variables, the torque which is transmitted to the wheels by the gear mechanism, a regulating block which is connected downstream of the observer determining a compensation torque from the estimated torque, and the compensation torque being added to the setpoint torque of the electric motor, as a result of which a regulating circuit is obtained. By means of these measures, a travel characteristic which is significantly improved for the driver is achieved and the material loading in the drive train is reduced.