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Actuating device of a brake system

A brake system and brake circuit technology, applied in the direction of brake transmission, transmission, brakes, etc., can solve the problems that the transmission mechanism cannot continue to operate efficiently, the transmission mechanism is fatigued, and the reliability of the braking system is guaranteed.

Active Publication Date: 2018-02-27
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extent of the side load applied by the piston to the bore and the reaction force applied to the ball drive fatigues the drive prematurely and prevents the drive from running efficiently and / or maintaining the reliability of the braking system

Method used

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  • Actuating device of a brake system
  • Actuating device of a brake system
  • Actuating device of a brake system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 A device according to the invention for actuating a brake system 1 is shown, comprising a master cylinder 10 which supplies brake circuits C1, C2 with brake fluid under pressure by controlling The electric motor 20 controlled by the unit 40 activates the master cylinder in response to a braking request from the driver (brake pedal 42 ) or from a driver assistance system 45 (which is, for example, an EPS system). The driver communicates his braking request by actuating the brake pedal 42 . The actuation is detected by a sensor 41 which transmits a braking signal SC to a control unit 40 which is connected to an auxiliary system 45 in order to control the electric motor 20 .

[0026] The master cylinder 10 is represented only schematically by the bore 11 of its cylinder block, which is arranged in a piston (master piston) 12 . In the case of a tandem master cylinder, the secondary piston is not shown.

[0027] According to regulations, the piston 12 is referred...

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PUM

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Abstract

Actuating device of a brake system controlled by the brake pedal and / or a brake management means for supplying brake circuits with pressurised brake fluid, comprising: a master cylinder (10) connectedto the brake circuits (C1, C2) and comprising a primary piston (12), an electric motor (20) controlled for a braking action, a ball nut and screw transmission (30) for transforming the rotary movement of the electric motor (20) into a translational movement of the piston (12), the nut (32), which is blocked from moving in translation and free to rotate, being driven by the motor (20), the screw (31) being free to move in translation but blocked from rotating, a free connection rod (35) being pressed between the base (122) of the piston (12) and the screw (31) in order to transmit the thrust of the screw (31) to the piston (12).

Description

technical field [0001] The invention relates to a device for actuating a brake system which is controlled via a brake pedal and / or means for brake management (for example a driver assistance system) in order to provide a brake circuit under pressure. moving liquid. Background technique [0002] Typically, electric brake assist devices require a form of transmission that enables the angular motion of the electric motor to be converted into linear motion in order to apply force and place one or more pistons in a hydraulic pressure generator (such as a master cylinder) move in. [0003] Ball screw assemblies are often considered for this application. However, the parts of this ball screw drive are very stiff under load and due to the various dimensional tolerances in the system they cannot adapt to the guide surface of the master cylinder's piston in its bore in order to maintain small radial tolerances And realize the function of guaranteeing the pressure generation during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/74
CPCB60T13/745F16D2125/40B60T2270/82F16H25/20
Inventor R·斯普罗寇C·安德逊
Owner ROBERT BOSCH GMBH