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:
Sep. 28, 1999
Filed:
Dec. 22, 1997
Friedrich Graf, Regensburg, DE;
Frank Lohrenz, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A controller for a motor vehicle device, such as a transmission. The transmission ratio is automatically controlled in dependence on at least the accelerator pedal position and the driving speed, using stored characteristic maps. A fuzzy logic circuit has at least one rule base. Various signals, which characterize driving states and the load state of the motor vehicle, are evaluated by the fuzzy logic circuit and control signals are generated in response. The control signals define the transmission ratio. At a predefined dynamic driving state, an additional control signal is generated by the fuzzy logic circuit, by means of which signal a change to the transmission ratio is carried out. That change is independent of the respective characteristic map. Dynamic driving states of this type are, for example, the occurrence of an impermissible wheel brake slip or driving down relatively long downhill gradients.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile