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:
Jul. 17, 1984
Filed:
Sep. 27, 1982
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To permit operation of an anti-skid or anti brake-lock system with wheels having dual braking cylinders, controlled by separate braking valves, control signals to control separate brake valves (V.sub.11, V.sub.12) at respective sides of the vehicle are derived for a first braking system (I) in accordance with well known technology, based on wheel acceleration, deceleration and the like, processed in an anti-skid control unit (9), and a second braking system, controlled by a single valve (V.sub.2), is provided connected to the second braking cylinders in both wheels. The control signals for the second valve (V.sub.2) are generated as a function of the signals arising in the first system (I) by a logic circuit (15-25) including timing elements (15, 16, 19, 21) responsive to leading and trailing flanks, respectively, of opening and closing signals arising in the first braking system (I) under command of the wheel anti-lock or anti-skid control unit (9), to drop braking pressure in the second system (II) if unstable operation of the wheels, based on braking in the first system (I) occurs, and raising braking pressure only after a time delay (19; T.sub.2) if an increase in braking pressure in the first system occurred. As an override safety, response of the braking control unit (9) is indicated by a separate override signal, absence of which leaves the second braking system (II) unaffected, but presence thereof prevents raising of braking pressure in the second system during response of the anti-skid unit and controlling the first system.