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:
Feb. 14, 1989
Filed:
Dec. 04, 1986
Eberhard Weiss, Hemmingen, DE;
Manfred Stahl, Stuttgart, DE;
Helmut Domann, Leonberg, DE;
Erich Jung, Muhlacker, DE;
Franz Maurer, Kempten, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A brake control system has a controller (52, 53, 54) including hysteresis. To prevent over-shoot of control operation if a comparison between actual braking pressure (P.sub.act) and commanded pressure (P.sub.com) is applied to control valves which, for example, operate pneumatically, so that the brakes will not instantaneously respond, a difference pressure threshold (.DELTA.P.sub.G) is determined and, when the difference pressure level is passed by the difference pressure signal, the valves are controlled to operate in pulse operation, in which each pressure pulse (T.sub.E) is followed by a quieting or pressure-OFF time (T.sub.BER). The pulse sequence and the timing of pulses and pulse gaps is controllable in accordance with pressure levels, operating parameters, pressure difference levels and the like.