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:
Nov. 27, 1984
Filed:
May. 27, 1981
Dietrich Knodler, Friedrichshafen, DE;
Werner Boes, Friedrichshafen, DE;
Anton Ott, Tettnang, DE;
Kurt O Venger, Friedrichshafen, DE;
Zahnradfabrik Friedrichshafen Aktiengesellschaft, Friedrichshafen, DE;
Abstract
A system for controlling the torque to be transmitted by a fluid-operated friction coupling (clutch or brake) in an automatic speed changer comprises a processor which receives readings of the rotary speeds of an input member and an output member to be interengaged by that coupling and calculates the instantaneous relative angular acceleration .alpha.=-d.vertline..DELTA.n.vertline./dt from these data, the value .alpha. being supplied to a comparator. A computer receiving the same readings determines the optimum acceleration and feeds the result to the comparator whose output actuates a governor controlling the fluid pressure supplied to the coupling.