Brake power generator for a hydraulic vehicle braking system

Abstract

The invention relates to a brake power generator (10) for a hydraulic vehicle braking system (12). Said generator comprises: a power input member (56), which can be or is coupled to a brake pedal (58) and can be displaced in a base housing (14) of the brake power generator (10); a master brake cylinder (16), in which a primary piston (66) is displaceably guided, said primary piston (66) together with the master brake cylinder (16) delimiting a primary pressure chamber (70) for the generation of a hydraulic brake pressure; a pedal counter-force simulation device (80), which can be coupled to the power input member (56); and an actuating force generation unit for exerting an actuating force on the primary piston (66). The brake power generator is characterised in that the pedal counter-force simulation device (80) can be or is fluidically coupled to the power input member (56) and that the actuating force generation unit comprises a control valve (18) and an assembly of chambers, the chamber assembly being configured with a negative pressure chamber (40) and a working chamber (42) that is separated from the negative pressure chamber (40) by a mobile wall (36) and that can be fluidically connected by means of the control valve (18). The control valve (18) can be controlled mechanically by the actuation of the pedal to obtain a pressure differential that determines the actuating force between the working chamber (42) and the negative pressure chamber (40).

Description

technical field [0001] The invention relates to a braking force generator for a hydraulic vehicle braking system and a hydraulic vehicle braking system equipped with such a braking force generator. The brake force generator according to the invention is designed with a force input element which can engage or be coupled to a brake pedal and which is movable within the base housing of the brake force generator, a master brake cylinder in which the master piston is movably guided, and a A pedal reaction force simulation device engaged with the force input element and the actuation force generating device to apply an actuation force on the master piston, wherein the master piston and the master brake cylinder define a master pressure chamber to generate hydraulic brake pressure. Background technique [0002] In braking systems commonly used today, the hydraulic brake pressure necessary to pressurize the wheel brakes on the vehicle is primarily generated by the master brake cylin...

AI Technical Summary

Problems solved by technology

[0006] The above solutions in the prior art actually have the advantage of partial or even complete separation of brake force generation from brake pedal actuation, but they require very complex assembly and design

In particular, the above-mentioned brake systems equipped with electronic actuators according to the prior art are complex in structure and therefore expensive to produce

Another disadvantage of the system described above is that the pedal reaction force simulation device used therein is in any case arranged directly on the force input element engaging the brake pedal, which results in a relatively large construction volume

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