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:
Mar. 04, 2003
Filed:
May. 10, 2001
Georg Gierer, Kressbronn, DE;
Uwe Rühringer, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
An electronic-hydraulic control device of an automatic automobile transmission with frictional clutches or brakes that can be hydraulically operated to shift individual gears (A, B C, D, E), and with an electronic control device ( ) which is electrically connected with a lever inside the motor vehicle, shifting gears depending on the preselected lever position and certain parameters of the combustion engine and transmission. If the electronic control device ( ) thus de-energizing all solenoid valves ( ), an emergency gear is maintained during forward travel until the combustion engine is shut off after which the parking mechanism is automatically engaged, and if the electronic transmission control ( ) fails during rearward travel, all clutches or brakes are depressurized and the parking mechanism is automatically engaged. By manually operating a lever ( ), a valve ( ) is actuated which automatically engages an emergency gear for forward travel and simultaneously unlocks the parking mechanism, with the parking mechanism and forward gear being maintained until the combustion engine is shut off.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile