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US 7,922,264 B2Granted
Hydraulic vehicle brake system
AssigneeRobert Bosch GmbH
InventorsDietmar Baumann, Dirk Hofmann
Life of this patent
Estimating the term…
Abstract
The invention proposes equipping a hydraulic vehicle brake system with a pedal travel modulator that has an electromechanically driven piston-cylinder unit. The piston-cylinder unit upon brake actuation “furnishes” additional brake fluid and thereby boosts a pedal travel of the vehicle brake system.
Claims7
A hydraulic vehicle brake system, comprising:
- a service brake actuated by muscle power force on the brake pedal;
- a master cylinder for actuating the vehicle brake system;
- and
- an electrohydraulic pedal travel modulator having a piston-cylinder unit that communicates with the master cylinder, having an electric motor drive mechanism which is controlled as a function of an actuation travel of the master cylinder in such a way that a volume of pressure fluid positively displaced into the master cylinder by the pedal travel modulator has a hydraulic pressure that corresponds to the hydraulic pressure in the master cylinder generated by the muscle force on the brake pedal from the service brake, and having a piston reverse-stroke limiter, which limits a reverse stroke of the modulator piston in a release direction of the vehicle brake system, wherein the piston reverse-stroke limiter is embodied as a spring ring inserted into a groove of the cylinder.
1 more element
Dependencies are inferred from the claim text.