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WO1996016853A1 - Systeme de freinage hydraulique - Google Patents

Systeme de freinage hydraulique Download PDF

Info

Publication number
WO1996016853A1
WO1996016853A1 PCT/DE1995/001529 DE9501529W WO9616853A1 WO 1996016853 A1 WO1996016853 A1 WO 1996016853A1 DE 9501529 W DE9501529 W DE 9501529W WO 9616853 A1 WO9616853 A1 WO 9616853A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake system
hydraulic brake
chamber
guide body
partial
Prior art date
Application number
PCT/DE1995/001529
Other languages
German (de)
English (en)
Inventor
Andreas Wetzel
Jürgen HACHTEL
Thomas Lutz
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1996016853A1 publication Critical patent/WO1996016853A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
    • B60T8/4881—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems having priming means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B60T17/222—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems by filling or bleeding of hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4068—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B60T8/4291—Pump-back systems having means to reduce or eliminate pedal kick-back

Definitions

  • the invention relates to a hydraulic brake system with an anti-lock device according to the preamble of the main claim.
  • a hydraulic brake system is known from DE 4 121 278 AI.
  • Brake systems of this type often have one or more damper chambers which are connected downstream of one or more pumps. Such damper chambers must be free of trapped air. Therefore, reliable ventilation of the same as well as of the entire brake system is absolutely necessary for a first filling with brake fluid pressure medium as well as for maintenance and repair work.
  • DE 40 13 160 AI already suggests arranging the damper chamber with a vertical longitudinal axis in a housing and opening the connected pipe sections on an upper, horizontal chamber wall. In such an arrangement, air pockets can escape purely statically when the damper chamber is filled with pressure medium through an outlet mouth and a line branch adjoining it. Such ventilation is not complete, however, if the damper chamber is installed in the vehicle with a longitudinal axis that deviates from the vertical.
  • Vehicle manufacturers can provide for the first filling of the hydraulic brake system.
  • the invention has for its object to improve the ventability, so that the venting can be carried out reliably even in small repair shops without great effort.
  • the venting process should also be able to run purely statically, and it should be precise or feasible even with a slight inclined installation of the damper chamber.
  • the guide body is designed as a separate disk and is fixed in the head space of the chamber. Because the end face of the damper chamber can hardly be brought into such a shape and in such a smooth state by simple means as the surface can be formed on a turned disk. Finally, it is particularly advantageous to provide the guide body with a hollow cone mouth surface. Such a design allows the air bubbles to flow safely even when the damper chamber is installed at an angle.
  • FIG. 1 shows a circuit diagram of a hydraulic brake system with a damper chamber arranged on the pressure side of a return pump
  • FIG. 2 shows a cross section through a damper chamber and with a guide body arranged in this damper chamber.
  • 3 shows a view from the inside of the guide body according to FIG. 2
  • FIG. 4 shows a damper chamber with another guide body
  • FIG. 5 shows a view from the inside of the guide body according to FIG. 4. Description of the embodiments
  • the circuit diagram shown in FIG. 1 represents a multi-circuit hydraulic brake system 10 for a motor vehicle with elements of a
  • Brake circuit II which is assigned to a rear axle of the vehicle, for example, has a brake cylinder 12 and a refill container 13 and wheel brakes 14 and 15
  • the pressure brakes 19 and 20 for the brake pressure modulation are assigned to the wheel brakes 14 and 15.
  • the anti-lock device 11 also has a pump, for example as a return pump 21, with which, for example, pressure medium removed from the wheel brakes 14 and 15 can be pushed back into the brake line 16.
  • a line 22 is provided on the pressure side of the return pump 21, in the course of which a damper chamber 23 and in the flow direction a throttle point 24 are arranged behind it.
  • the hydraulic unit 25 has a housing 26 in which the
  • Damper chamber 23 is provided, as can be seen in Figure 2.
  • a blind bore 27 is made in the housing 26 from below.
  • the damper chamber 23 therefore has a circular cylindrical cross section and one Upper chamber end wall 29 running at right angles to a longitudinal axis 28 of the chamber.
  • the line 22 opens into a head space 30 adjoining the chamber end wall 29, specifically with two line sections, namely an inlet line section 31 and an outlet line section 32.
  • a press-in sleeve 33 is in the outlet line section 32 installed, which carries the throttle point 24.
  • the chamber 23 is closed off from outside air by a tightly inserted cup-shaped closure piece 34 with a snap ring 35 as an axial lock.
  • a circular guide body 36 bears on the chamber end wall 29 and has two holes 37 and 38 parallel to a longitudinal axis 28.
  • One hole is an inlet hole 37 and forms a continuation of the inlet line section 31 and also has the same diameter as this.
  • Hole 37 lies behind the plane of the drawing.
  • the other hole is an outlet hole 38 and forms the continuation of the outlet line section 32; the hole 38 has a diameter in the size of the outer diameter of the press-in sleeve 33. Both holes 37 and 38 follow one
  • Muzzle area 39 each a conical extension 44, which can end rounded on the muzzle surface.
  • the outlet surface 39 is, as also shown in FIG. 3, inclined in such a way that the outlet hole 38 begins at the highest point 40 of the outlet surface 39.
  • the outlet surface 39 consists of a plurality of partial surfaces 41, 42 and 43, of which the two outer partial surfaces 41 and 43 are inclined at an angle of approximately 30 ° and the third partial surface is an intermediate partial surface 42. In contrast to the drawing, it can also have a groove-like design, ie have rounded transitions to the other two partial surfaces 41 and 43.
  • One partial surface 43 is more inclined than the other partial surface 41, and this weakly inclined partial surface 41 should be inclined at least as much with respect to a horizontal one as a possibly required inclined installation of the hydraulic unit 25.
  • the Leitk ⁇ rper 36 is essentially designed as a disc and is inserted in the head space 30 of the damper chamber 23. For safety, in particular with a rough surface of the blind bore 27, it can still be sealed with sealing rings, not shown, or by means of a sealing compound, not shown, against the wall of the damper chamber 23 and against the chamber end wall 29.
  • the press-in sleeve 33 can either be extended in the exemplary embodiment according to FIGS. 2 and 3 such that it protrudes into the outlet hole 38 of the guide body 36 (shown in broken lines), or it can, as in the case of Embodiment according to Figures 4 and 5, a special eccentrically mounted pin 45 can be provided to prevent rotation.
  • This pin 45 can - as shown - be formed on the Leitk ⁇ rper 36, but it can also be carried by the chamber end wall 29.
  • a guide body 46 is used, in which an orifice surface 47 is formed by a hollow cone.
  • the hollow cone is arranged eccentrically to the guide body 46, and a cone tip lies directly at a highest point 48, at which an outlet hole 49 begins.
  • An inlet hole 50 opens out further at the
  • Opening area 47 As can be seen in FIG. 5, pin 45, outlet hole 49 and inlet hole 50 are located for example in a section plane.
  • the remaining features of the exemplary embodiment according to FIGS. 4 and 5 correspond to those according to FIGS. 2 and 3; they therefore have the same reference numbers.
  • the damper chamber 23 has the upper chamber end wall 29 already mentioned, which is completely covered by the guide body 36 or 46.
  • the Leitk ⁇ rper 36 and 46 thus completely separates the problematic upper corner area of the end wall from the system.
  • the guide body 36 and 46 has a finely machined and therefore smooth mouth surface 39 and 47, on which no air bubbles can get stuck.
  • brake fluid must be supplied from the master brake cylinder 3, and the vent valves provided in the vicinity of the wheel brakes 14 and 15 must be opened at high points.
  • the return pump 21 is also switched on, which presses the brake fluid through the damper chamber 23.
  • the damper chamber 23 can be optimally vented. Due to the inventive design of the head space 30 with the streamlined and smooth-walled slope for air bubbles leading to the outlet hole 38 or 49, complete ventilation of the damper chamber 23 and thus the entire brake system can be achieved even at low flow speeds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un auxiliaire de purge (36, 46) prévu pour un système de freinage hydraulique (10), comportant une pompe (21) qui refoule un fluide hydraulique à travers une conduite (22), dans le cours de laquelle il est prévu une chambre d'atténuation (23) située entre deux sections de conduite (31, 32). Dans l'espace de tête (30) de la chambre d'atténuation (23), l'auxiliaire de purge se présente sous forme de corps déflecteur (36, 46) dont la conformation appropriée de la surface de décharge (39, 47) permet d'éliminer, dans l'espace de tête (30), la formation de coins et de poches où des bulles d'air pourraient s'amasser. Grâce à l'usinage fin dont elle a fait l'objet, la surface de décharge (39, 47) est particulièrement lisse, de sorte que des bulles d'air ne peuvent se fixer sur elle. Ces différentes mesures permettent d'assurer une purge fiable de la chambre d'atténuation (23) du système de freinage. Ce système de freinage hydraulique (10) convient à des automobiles équipées d'un système de freinage antiblocage et/ou d'un système de freinage antipatinage.
PCT/DE1995/001529 1994-11-25 1995-11-04 Systeme de freinage hydraulique WO1996016853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944442032 DE4442032A1 (de) 1994-11-25 1994-11-25 Hydraulische Bremsanlage
DEP4442032.3 1994-11-25

Publications (1)

Publication Number Publication Date
WO1996016853A1 true WO1996016853A1 (fr) 1996-06-06

Family

ID=6534164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001529 WO1996016853A1 (fr) 1994-11-25 1995-11-04 Systeme de freinage hydraulique

Country Status (2)

Country Link
DE (1) DE4442032A1 (fr)
WO (1) WO1996016853A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002008036A1 (fr) * 2000-07-20 2002-01-31 Robert Bosch Gmbh Chambre d'accumulation pour un systeme de freinage hydraulique de vehicule et systeme de freinage hydraulique de vehicule
US20160001754A1 (en) * 2014-07-02 2016-01-07 Mando Corporation High pressure accumulator of brake system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990011212A1 (fr) * 1989-03-21 1990-10-04 Alfred Teves Gmbh Systeme hydraulique de freinage antiblocage
DE4013160A1 (de) * 1990-04-25 1991-10-31 Bosch Gmbh Robert Gehaeuseblock fuer ein hydraulisches bremssystem
DE4111201A1 (de) * 1991-04-06 1992-10-08 Bosch Gmbh Robert Hydroaggregat zum einsetzen in eine bremsleitung
DE4121278A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Hydraulische bremsanlage mit blockierschutzeinrichtung, insbesondere fuer kraftfahrzeuge
DE4234013A1 (de) * 1992-10-09 1994-04-14 Teves Gmbh Alfred Hydraulikaggregat für schlupfgeregelte Bremsanlagen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990011212A1 (fr) * 1989-03-21 1990-10-04 Alfred Teves Gmbh Systeme hydraulique de freinage antiblocage
DE4013160A1 (de) * 1990-04-25 1991-10-31 Bosch Gmbh Robert Gehaeuseblock fuer ein hydraulisches bremssystem
DE4111201A1 (de) * 1991-04-06 1992-10-08 Bosch Gmbh Robert Hydroaggregat zum einsetzen in eine bremsleitung
DE4121278A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Hydraulische bremsanlage mit blockierschutzeinrichtung, insbesondere fuer kraftfahrzeuge
DE4234013A1 (de) * 1992-10-09 1994-04-14 Teves Gmbh Alfred Hydraulikaggregat für schlupfgeregelte Bremsanlagen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002008036A1 (fr) * 2000-07-20 2002-01-31 Robert Bosch Gmbh Chambre d'accumulation pour un systeme de freinage hydraulique de vehicule et systeme de freinage hydraulique de vehicule
US20160001754A1 (en) * 2014-07-02 2016-01-07 Mando Corporation High pressure accumulator of brake system
CN105270373A (zh) * 2014-07-02 2016-01-27 株式会社万都 制动系统的高压蓄能器
US9522660B2 (en) * 2014-07-02 2016-12-20 Mando Corporation High pressure accumulator of brake system

Also Published As

Publication number Publication date
DE4442032A1 (de) 1996-05-30

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