Brake master cylinders with contoured pressure pistons for motor vehicle braking systems

A technology for brake master cylinders and pressure pistons, which is applied in the direction of brake transmission devices, fluid pressure actuators, hydraulic brake transmission devices, etc., and can solve the problem of weakening of the internal throttling effect, leakage of the sealing mechanism 1, radial Hole 8 is completely closed and extended, etc.

CN104470776BActive Publication Date: 2017-03-15LUCAS AUTOMOTIVE GMBH
1 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-03-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a master cylinder arrangement for a braking system of a motor vehicle, comprising: a master cylinder housing (12) having a cylindrical recess (14); At least one pressure piston (16, 18) moving and sealingly guided in a cylindrical recess (14) of the cylinder housing (12); a fluid reservoir for storing brake fluid via a fluid channel ( 44) is in fluid communication with the master cylinder housing (12). The at least one pressure piston (16, 18) together with the brake master cylinder housing (12) encloses in a sealed manner a pressure chamber (56, 58) which is or can be fluidically connected to a fluid circuit of the motor vehicle brake system. and in fluid communication or disconnection with the fluid reservoir depending on the position of the associated pressure piston (16, 18). A sealing mechanism (46) surrounding the pressure piston (16, 18) is arranged between the outer peripheral surface (60, 62) of the pressure piston (16, 18) and the cylindrical recess (14) of the brake master cylinder housing (12). ,48). In order to improve the responsiveness of the braking system of a motor vehicle, according to the invention, in the axial region where the initial position of the pressure piston (16,18) spans the sealing mechanism (46,48) in the axial direction, the pressure piston (16,18) The outer peripheral surface (62) of is provided with profiled contours (64, 66) which create fluid communication between said fluid reservoir and pressure chambers (56, 58).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a brake master cylinder arrangement with a specially contoured pressure piston for a braking system of a motor vehicle, the brake master cylinder arrangement comprising:

[0002] – brake master cylinder housing with cylindrical recess,

[0003] - at least one pressure piston, which is guided in a cylindrical recess in the master cylinder housing in a movable and sealing manner along the longitudinal axis,

[0004] - a fluid reservoir storing brake fluid, the fluid reservoir being in fluid communication with the brake master cylinder housing via a fluid passage,

[0005] wherein the at least one pressure piston together with the brake master cylinder housing encloses in a sealed manner a pressure chamber which is or can be in fluid communication with the fluid circuit of the motor vehicle brake system and which, depending on the position of the associated pressure piston, the pressure The cavity is in or out of fluid communicati...

Examples

Embodiment Construction

[0026] figure 1A brake master cylinder arrangement according to the invention, generally designated with the reference numeral 10 , is shown in a cross-sectional view including the axis. The master cylinder arrangement 10 has a master cylinder housing 12 in which a substantially cylindrical recess 14 is arranged. Two pressure pistons are guided in this cylindrical recess 14 , that is to say a first pressure piston, the so-called primary piston 16 , and a second pressure piston, the so-called secondary piston 18 . The secondary piston 18 is supported via a return spring 20 on the bottom surface 22 of the master cylinder housing 12 . The other end of the return spring 20 facing away from the base 22 is supported in a recess 24 in the secondary piston 18 . Likewise, the primary piston 16 is supported on the secondary piston 18 via a return spring 26 . The return spring 26 is prestressed by means of a tensioning mechanism 28 which has a cup 30 and a plunger 32 . The main pisto...