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. 01, 1988
Filed:
Apr. 02, 1986
Reinhard Resch, Stuttgart, DE;
Daimler-Benz Aktiengesellschaft, Stuttgart, DE;
Abstract
A modulator for a vehicle with a power-assisted hydraulic multiple-circuit brake system, providing an output pressure to a static brake circuit that is proportional to the sum of the forces affecting a pressure modulator piston. These forces include a pedal pressure from the brake-pressure control device to a first driving pressure space of the modulator and booster pressure from the pressure of a proportional control valve to a second driving pressure space of the modulator, which shifts the modulator piston to decrease the output pressure space. Forces produced by auxiliary pressure in a counterpressure space shifts the modulator piston to enlarge the output pressure space. A control valve arrangement disconnects the second driving pressure space from the booster pressure and instead relieves pressure of the second driving pressure space in pressure-reduction phases of the antilock control. The pressure reduction control takes place by the control valve coupling of the output pressure of the auxiliary pressure source into a counterpressure space, thereby shifting the modulator piston in the sense of a volume expansion of its output pressure space and as a result, reducing the pressure in the wheel brake.