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:
Oct. 27, 1987
Filed:
Jan. 28, 1987
Dieter Kircher, Frankfurt am Main, DE;
Hubertus von Gruenber, Kronberg, DE;
Klaus D Blum, Kelkheim, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
For the control of a brake-slip controlled brake system the brake pedal force assisted by auxiliary force is transmitted onto a master cylinder (10, 10', 33) and from said onto the wheel brake cylinders via several pressure fluid paths that are adapted to be closed independently of one another. The wheel rotational behavior and the vehicle velocity will be measured with sensors (S1 through S4), the signals will be logically combined, and therefrom control signals will be generated for electromagnetically actuatable directional control valves (15, 16, 17, 19, 35, 36, 37, 42, 43, 52). During control action, the pedal force (F) that is directed to the master cylinder and assisted by auxiliary force will be compensated temporarily by an opposed force, as a result whereof the pressure rise in the master cylinder will be retarded or pressure will even be decreased. During the phase of reduced pressure in the master cylinder, the switching position of the directional control valve (15, 16, 17, 35, 36, 42, 43) which are inserted in the pressure fluid lines (24, 24', 25, 25') leading to the wheel brake cylinders will arrange for the pressure in the wheel brake cylinders to be either maintained constant due to line closure, or to be reduced to the level desired by causing pressure fluid to discharge to the master cylinder (10, 10', 33) through the directional control valves switched to open passage.