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. 16, 2004
Filed:
Jun. 28, 2000
Alfred Klatt, Wathlingen, DE;
WABCO GmbH & Co. oHG, Hannover, DE;
Abstract
A device for controlling a gearshift which has a first pressure medium chamber and a second pressure medium chamber which are separated from each other by a piston, includes a first valve system, a second valve system, and an upstream third valve system by which the two pressure chambers are selectively connectable to a pressure medium source or to a pressure medium sink or can be closed off against both as a function of the output signals of an electrical control system. A pressure sensing device is installed between the pressure medium inputs of the two valve systems and the pressure medium outlet of the third valve system by which the pressure in each one of the pressure medium chambers of the gearshift can be measured or by which the pressure of the pressure medium source, i.e. the supply pressure, can be monitored. The electrical control system is designed in such manner that the actuation of at least one of the valve systems can be rendered dependent on at least the signals of the pressure sensing device, so that the gearshifting force and also the gearshifting speed of the gearshift can be controlled as a function of pressure.