Robert Boschgmbh

Raynald Sprocq

Chris Anderson

Bastien Cagnac

Simon Hansmann

Andreas Weh

Matthias Mayr

Matthias Kistner

Harald Guggenmos

Jean-Marc Attard

Florent Yvonet

Philippe Richard

Dirk Foerch

Jean-Pierre Michon

François Gaffe

Stéphane Lacroix

Carole Charpentier

Yannick Nen

Omar Brahmi

Henry Pagot

Roman Winkler

Komi Sokou

Christian Schalkwijk

Martin Hoss

Juergen Vogg

Christoph Pietsch

Christoph Nehr

Jean-Yves Dreo

Laurent Vagner

Hervé Angleviel

A master brake cylinder is described for a brake system of a motor vehicle as having a hydraulic cylinder that has a plurality of hydraulic connections, in which at least one hydraulic piston is mounted so as to be displaceable axially in a direction of actuation and in a relief direction, the hydraulic piston being displaceable against the force of a spring element in the direction of actuation, the hydraulic piston having at least one lateral wall opening that, in at least one sliding position, opens into an inner chamber of the hydraulic cylinder. It is provided that the lateral wall opening is assigned an elastically deformable sealing ring that on its inner side is fastened on the hydraulic piston and on its outer side is pre-loaded against the hydraulic cylinder by its inherent elasticity and is shaped such that when the hydraulic piston is displaced in the direction of actuation it detaches from the hydraulic cylinder, and when the hydraulic piston is displaced in the relief direction it bears on the hydraulic cylinder.

Master brake cylinder, braking system

A pedal-force simulator device is described as having a housing in which an actuable pressure plunger is mounted in an axially displaceable manner, and having at least two coil springs, which are disposed parallel to one another between an end face of the pressure plunger and an axial stop of the housing. It is provided that at least one disk spring is interposed between the coil springs and the axial stop and/or between the coil springs and the pressure plunger in each case.

Pedal-force simulator device

A pedal travel simulator for a hydraulic power vehicle braking system. For the purpose of adapting to different main brake cylinders and of changing a spring characteristic curve, a stop is provided to be pressed into a piston of the pedal travel simulator. A pressing-in depth of the stop delimits a piston stroke.

Pedal travel simulator and hydraulic block including a pedal travel simulator

A system in which the device connecting the brake pedal to the brake actuator includes a control rod and a thrust rod guided in a cylinder, connected to the rod by a ball joint and returned by a spring. The end of the rod comprises a spherical cap having a spherical front bearing surface and a flat rear surface, perpendicular to the axis of the rod. A centering sleeve freely surrounding the control rod presses with its front edge against the rear face of the cap, pushed by a centering spring bearing on the thrust rod and on the centering sleeve to tilt the spherical cap and the rod toward the axis of the thrust rod.

Decoupled electronic braking system with a movement transmission device with radial effect compensation

A hydraulic block includes pedal travel simulator for a hydraulic power-assisted vehicle braking system includes a piston that is displaceable in a cylinder, a piston spring that acts on the piston against the displacement, and a stroke limiter limiting the displacement. A characteristic curve of such a pedal travel simulator is set.

Pedal travel simulator, hydraulic block including such a pedal travel simulator, and method for setting a characteristic curve of such a pedal travel simulator

An actuating device of a brake system controlled by a brake pedal and/or a brake management system for supplying brake circuits with pressurized brake fluid includes a master cylinder, an electric motor, a ball/nut screw transmission, a nut, a screw, and a free connection rod. The master cylinder is connected to the brake circuits and has a primary piston. The electric motor is controlled for a braking action. The ball nut/screw transmission is configured to transform rotary movement of the electric motor into a translational movement of the primary piston. The nut is blocked from moving in translation, free to rotate, and driven by the electric motor. The screw is free to move in translation but blocked from rotating. The free connection rod is pressed between a base of the primary piston and the screw in order to transmit a thrust of the screw to the primary piston.

Actuating device of a brake system

A brake control unit includes a primary piston and a secondary piston that respectively define a primary chamber and a secondary chamber. The primary piston carries an intermediate piston that slides in the secondary piston. A primary insulating seal is disposed between the pistons such that the primary insulating section of the primary insulating seal only depends on the equivalent section connecting the force applied at the inlet and the secondary pressure. The ratio of the hydraulic sections is configured to be modified without having to intervene on the primary and secondary pressure seals for the main piston and the secondary seal by way of modifying the section of the plunger piston and that of the seal thereof.

Brake control unit

A dual-screw movement converter, in which a movement converter between a drive organ includes a screw fixed in translation and driven in rotation, having threads, a nut connected in translation to the receptor organ, having first threads engaging with the threads of the screw and second threads. A sleeve coaxially surrounds the nut, fixed in rotation and translation with respect to the screw and having threads with which the second threads of the nut engage. To the nut, slaved by its second threads to the threads of the sleeve, screw communicates a combined movement of rotation and translation whose translation component along an axis is transmitted to the receptor organ.

Dual-screw movement converter

Braking system with master cylinder (), decoupled from the brake pedal and hydraulic brake booster (), comprising A controlled hydraulic link () connects the boost chamber () and the actuator chamber () and a further controlled hydraulic link () connects the actuator chamber () to the chamber of a brake simulator ().

Brake system with master cylinder, disengaged from the brake pedal, and hydraulic brake booster

Brake system comprising a thrust rod () driven by the servobrake () and actuating the piston () of the master cylinder (), the servobrake () being linked by a hydraulic actuator () to the control rod () of the brake pedal (PF). The servobrake () comprises an actuator piston () controlled by an electric motor () via a rack drive ().

Brake system with electric servo brakes

The present invention relates mainly to a brake booster that is adjustable, notably in terms of the value of the jump. Advantageously, according to the invention, the target value for equilibrium of operation of the booster actuator is altered. A target value of a signal delivered by a position sensor is defined either by programming the electronic control unit or by selecting a coefficient in a program as a function of the braking characteristic or characteristics that it is desired to implement. Once the setpoint value has been determined, the electronic control unit commands the actuator using a setpoint value so that the actuator permanently and dynamically works toward achieving the previously defined and/or selected target value. The setpoint may be calculated as a function of torque, force, position or some other parameter.

Adjustable brake booster

The present invention relates chiefly to a hydraulic brake booster comprising a motor, preferably an electric motor. The main subject of the invention is a hydraulic brake booster comprising a thrust chamber () receiving, on command, a pressurized hydraulic fluid that drives a hydraulic piston () that drives a piston of a master cylinder, characterized in that it comprises a source of pressurized hydraulic liquid () provided with an electric motor () driving a hydraulic fluid pressuring device. The invention applies notably to the automotive industry. The invention applies mainly to the braking industry.

Hydraulic brake booster comprising a motor

The present invention relates mainly to a braking system comprising a master cylinder comprising means of connection to a hydraulic braking circuit and means of connecting at least one chamber of the master cylinder to means of injecting brake fluid into said chamber. The main subject of the invention is a master cylinder () comprising at least one variable-volume chamber and one moving piston (), the movement of which causes the volume of said chamber to vary, and means of connecting said chamber to a hydraulic braking circuit, characterized in that it further comprises means () of connection to a source () of pressurized brake fluid. The invention applies notably to the motor industry. The invention applies mainly to the braking industry.

Master cylinder comprising means for injecting brake fluid into said master cylinder, and braking system comprising such a master cylinder

The three-way valve simulator () for a vehicle brake servo comprises: a control piston (); and a reaction piston () remote from the control piston when the simulator is at rest. It is arranged such that the control piston, under the effect of a command transmitted from outside the simulator, can be moved over a predetermined travel in the direction of the reaction piston without transmitting stress to the latter.

Three-way valve simulator for a vehicle brake servo with play compensation

The invention relates to a braking control system for automotive vehicles comprising a braking control member (), a brake booster () and a brake master cylinder (). The system of the invention further comprises a simulator () coupled pneumatically to the piston () of the brake booster (). Said simulator () receives at least one braking command from the braking control member () and makes it possible to establish, in return, a difference in pressure between the front chamber () and the rear chamber () of the brake booster so as to control the displacement of the piston (). Application: Brakes for automotive vehicles.

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