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Master cylinder with flow limitation system

A technology of brake fluid and main piston, used in brakes, brake transmissions, hydraulic brake transmissions, etc.

Active Publication Date: 2014-08-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pushrod is released quickly, it may cause the brake fluid in the master cylinder pressure chamber to pass through at atmospheric pressure due to the spring action pushing the piston faster than the brake fluid reaches the master cylinder

Method used

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  • Master cylinder with flow limitation system
  • Master cylinder with flow limitation system
  • Master cylinder with flow limitation system

Examples

Experimental program
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Effect test

Embodiment Construction

[0060] figure 1 Brake master cylinder 100 is shown with bore 11 , which receives primary piston 2 , secondary piston 3 and primary spring 7 and secondary spring 8 . The role of the pistons 2, 3 is to put the primary pressure chamber 9 and the secondary pressure chamber 10 under pressure. The brake fluid supply inlet holes 12, 13 are used to connect with a brake fluid container (not shown). Both sides of the inlet hole 12 are provided with sealing covers 33 , 4 , and both sides of the inlet hole 13 are provided with sealing covers 5 , 6 . When the master cylinder is at rest, the master piston 2 is at figure 1 at the position shown. The walls of the pistons 2 , 3 provided with channels 14 , 15 communicate the perforations 12 , 13 with the interior of each piston 2 , 3 and with the primary 9 and secondary 8 pressure chambers. At rest, the sealing caps 4, 6 allow communication between the inlet holes 12, 13 and the primary and secondary pressure chambers 9, 10, which are thus ...

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PUM

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Abstract

A master cylinder (200) equipped with a brake fluid reservoir (20) connected by its neck (201) which, with the body (29) of the master cylinder, forms a chamber (24) connected by drilling (23) to the (primary or secondary) pressure chamber of the master cylinder through the holes (220) in the piston (22). The chamber houses an orifice plate (30) limiting the flow / rate of flow of brake fluid drawn into the chamber (222) as the piston (22) returns to its rest position.

Description

technical field [0001] The invention relates to a master cylinder equipped with a brake fluid container connected to the master cylinder by its neck (goulot) engaging in a perforation in the upper part of the master cylinder to pass through the perforation through the wall of the master cylinder when the piston is at rest And through the hole of the piston (primary piston and / or auxiliary piston) to communicate with the pressure chamber. Background technique [0002] Known master cylinders comprise a primary piston and a secondary piston, usually made of aluminium, and both are mounted in series in an axial bore of the main body of the brake master cylinder, usually made of machined aluminium. Such a master cylinder is described in document FR2827244. A push rod in the cavity of the primary piston allows to actuate the movement of the primary piston which puts the primary pressure chamber under pressure, while the secondary piston puts the secondary pressure chamber under p...

Claims

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Application Information

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IPC IPC(8): B60T11/22B60T11/232B60T11/20
CPCB60T11/224B60T11/232B60T11/22B60T11/20
Inventor L.吕利耶M.罗德里古茨
Owner ROBERT BOSCH GMBH
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