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. 12, 2002
Filed:
Nov. 11, 1999
Joachim Feldmann, Neustadt, DE;
Bernd Kiel, Wunstorf, DE;
WABCO GmbH, Hannover, DE;
Abstract
A brake signal transmitter for an electronic braking system produces an electrical braking requirement signal as well as a mechanically produced pneumatic braking pressure. The electronic braking requirement signal is evaluated, together with other measured magnitudes which define the travel state, in an electronic vehicle control system, and a braking pressure is produced as a function of this evaluation by a braking pressure modulator. Following the principle of addition redundancy, the pressure produced mechanically by the brake signal transmitter is added to the pressure produced electrically by the brake modulator and the total pressure represents the braking pressure acting on the brake cylinders. In the event of failure of the electronic system, the mechanically produced pressure automatically becomes active as the braking pressure, and functions as the redundancy pressure. An addition device is provided within the brake signal transmitter itself, in which the pressure produced mechanically by the brake signal transmitter and the pressure produced electrically by the brake signal transmitter are added together. The electric braking pressure modulator may be part of the brake signal transmitter or, can be located outside the brake signal transmitter, and the pressure supplied thereby can be transmitted to the brake signal transmitter.