WO2000005115A2 - Pneumatischer kraftverstärker in tandembauweise - Google Patents
Pneumatischer kraftverstärker in tandembauweise Download PDFInfo
- Publication number
- WO2000005115A2 WO2000005115A2 PCT/EP1999/004996 EP9904996W WO0005115A2 WO 2000005115 A2 WO2000005115 A2 WO 2000005115A2 EP 9904996 W EP9904996 W EP 9904996W WO 0005115 A2 WO0005115 A2 WO 0005115A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power amplifier
- amplifier according
- fastening means
- bellows
- connecting channel
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
- B60T13/5675—Supportstruts
Definitions
- the invention relates to a pneumatic booster in tandem design, in particular for hydraulic vehicle brake systems with a housing, the interior of which is divided into a front and a rear booster chamber with the aid of a partition, with a first and a second movable wall, the front and the rear booster chamber divide into a first vacuum chamber and into a first working chamber or a second vacuum chamber and into a second working chamber, as well as with one or more connecting channels between the first working chamber and the second working chamber for pressure equalization between these two chambers.
- Such a power booster is known for example from EP 327 997 B1 and has fastening means which protrude through the chambers of the brake booster and which also pass through the center of the connecting channels.
- This design requires only a single recess in the housing components concerned both for fasteners and for the associated connecting channel.
- Brake boosters in tandem construction are also known, in which the pressure equalization between the first and third chambers is carried out by means of connecting channels which are integrated in the radially outer fastening flange of the two housing half-shells.
- the object of the present invention is to show another solution for pressure equalization between the two chambers and for fastening the brake booster to a wall fixed to the vehicle.
- the brake booster should be particularly versatile.
- each connection channel has a free flow cross-section, the flow cross-section is preferably circular, and in that the connection channel is arranged separately from at least one fastening means for the power booster on a pitch circle in such a way that the fastening means and the connection duct are provided offset with respect to one another in the circumferential direction.
- the connecting channel as a means for pressure equalization, only performs pressure equalization tasks.
- fasteners and connecting channels are each provided in pairs and that the pairs of fasteners and the connection channel pairs lie on partial circles of different diameters.
- two pitch circle diameters are provided in an advantageous embodiment, on each of which the connection channels or the fastening means are provided.
- the grouped arrangement of the corresponding components on a specific pitch circle diameter permits rational production and simple adaptation of the fastening situation to different vehicle types if the two pitch circle diameters correspond to the corresponding connection dimensions for different types of motor vehicles or vehicle manufacturers.
- a larger pitch circle diameter (as a connection dimension for fastening the braking device) is used by a vehicle manufacturer A) and a smaller pitch circle diameter by a vehicle manufacturer B)
- the invention enables the use of the larger pitch circle diameter for the power amplifier for fastening to the vehicle-fixed wall of vehicles from manufacturer A) and the use of the smaller pitch circle diameter for pressure compensation purposes.
- the smaller pitch circle diameter is used for fastening and the larger pitch circle diameter is used for the ventilation purposes described.
- the power boosters are consequently can be installed very variably without much effort and allows a kind of exchange installation.
- Fig. 1 longitudinal section of a first embodiment of the
- FIG. 2 shows a view of the brake booster according to FIG. 1 in the direction of arrow X to illustrate the pitch circle diameter;
- Fig. 3 shows a second embodiment of the invention in section along the line III-III m Fig. 1;
- FIG. 4 section as in FIG. 3 through a further modified exemplary embodiment and
- Fig. 5 is an additional, modified
- the force booster shown in the figures in tandem construction comprises a housing 2 which has two shell-shaped housing halves or housing half-shells 3, 4, preferably with the help of metal-forming technology Measures are pressed together.
- the interior of the housing 2 is divided with the aid of an approximately centrally arranged, fixed partition 5 into a front, master cylinder-side amplifier chamber 6 and a rear, brake pedal-side amplifier chamber 7, the front amplifier chamber 6 being constant through a first movable wall 8 m a first vacuum chamber 9 Pressure and in a first working chamber 10 variable pressure and the rear amplifier chamber 7 is divided by a second movable wall 11 m, a second vacuum chamber 12 and a second working chamber 13.
- the front housing half-shell 3 is usually provided with a vacuum connection (not shown), by means of which the first vacuum chamber 9 can be connected to a suitable vacuum source, for example an intake manifold of the motor vehicle engine, or to a pump.
- the second housing shell 4 is provided with an axial section of smaller diameter, to which a control housing 14 is guided so as to be axially movable.
- a valve arrangement (not shown) which is of no further interest here, which enables controlled ventilation of the two working chambers 10, 13 and thereby controls the pressure difference between the vacuum chambers 9, 12 and the working chambers 10, 13.
- the power booster also has a connecting channel 15 between the first working chamber 10 and the second working chamber 13, which according to the embodiment shown in FIG cylindrical sleeve 16 is formed, which preferably consists of deep-drawn sheet metal or plastic material.
- the sleeve 16 has a collar 17 with which it rests against a seal buttoned into an opening in the partition 5.
- the sleeve 16 In the other direction, the sleeve 16 with its wall 18 projects through the first vacuum chamber 9 and passes through the first movable wall 8 in a sealed manner, a free end projecting into the first working chamber 10.
- the seal in the area of the second movable wall 11 is used, for example, by a sliding seal 19 which rests movably on a smooth sealing surface on the outer circumference of the wall 18.
- Embodiment it is also conceivable to reverse the kinematics with respect to the connecting channel 15, that is, to arrange the connecting channel 15 with its sleeve 16 sealed on the second wall 11 and to provide the recess in the region of the partition 5 with the sliding seal, so that in operation of the brake booster, the sleeve 16 together with the first movable wall 8 immersion movements in the direction of the first working chamber 10 executes relative to the partition 5.
- the advantages associated with the first exemplary embodiment described above also apply without restriction to this kinematically reversed exemplary embodiment, which also falls under the teaching of patent claim 1.
- the power booster 1 also preferably has a fastening means 20 (tie rod) which extends through the amplifier space 6, 7 and projects with a front and a rear end 21, 22 from the two housing half-shells 3, 4.
- the front end 21 of the fastening means 20 is used to fasten a master brake cylinder, not shown, which is pressed against a flat end face of the front housing half-shell 3 with a flange.
- the rear end 22 of the fastening means 20 is used to arrange a unit consisting of the master brake cylinder and the power booster 1 on a vehicle-mounted wall of a motor vehicle, which can usually be placed directly on a flat end face of the housing half-shell 4.
- a so-called pedal bracket is arranged, through which the rear end 22 also grips, in order to be screwed, for example, with a nut in such a way that the desired fastening of the brake booster Hauptbremszylmdere unit is accomplished on the vehicle.
- Seals of the movable walls 8, 11 and the partition 5 are of course also provided on the circumference of the fastening means 20 and the detailed function of the fastening means as a tie rod need not be discussed further here become .
- FIG. 2 shows a plan view in the direction of arrow X in FIG. 1 and for the rest FIG. 2 illustrates the section of FIGS. 1 and 3.
- a first pitch circle 23 and a second pitch circle 24 are shown, and on the First, large pitch circle 23, the only schematically indicated connection channels 15 are arranged.
- the through bores for the fastening means 20 are located on the second, small pitch circle 24 and it is further clearly evident that the fastening means 20 and the connecting channels 15 are arranged offset to one another in the circumferential direction. Without leaving the concept of the invention, it is conceivable to arrange the fastening means 20 on the large pitch circle 23 and to assign the connecting channels 15 to the small pitch circle 24.
- connecting channels 15 m circumferential to the fastening means 20 are provided.
- connection channels 15 and fastening means are arranged alternately.
- connecting ducts 15 and fastening means 20 are each arranged in pairs on the associated pitch circle diameters 23, 24 and the offset between a fastening means 20 and a connecting duct 15 is 90 degrees.
- a bellows 25 is provided as the connecting channel 15, which bellows on the second movable wall 11 and on the fixed partition 5 attached sealed, preferably buttoned.
- the bellows 25 has folds, which fold when the movable wall 11 moves axially in the direction of the partition 5, so that the bellows has an extremely small axial length in the folded state.
- the bellows 25 is here a separate component with respect to the movable wall 11 and the partition 5.
- no tie rod protruding through the chambers is provided, but there are the half-sheared fastening bolts, which are also offset relative to the connecting channel 15 on the circumference, so that a protruding head on the fastening means does not hinder the flow of electricity on the ventilation duct.
- FIG. 4 shows an exemplary embodiment with a bellows 25, which is integrally formed on a membrane 26 of the movable wall 11, preferably molded or vulcanized, plastic or rubber basically being considered as the membrane material.
- a bellows 25 which is integrally formed on a membrane 26 of the movable wall 11, preferably molded or vulcanized, plastic or rubber basically being considered as the membrane material.
- the other end of the bellows 25 is buttoned into a cylindrical recess in the partition 5, as in FIG. 3. Because, in the exemplary embodiment according to FIG. 4, at least one button operation in the area of the movable wall 11 can be omitted, this represents a solution that is particularly easy to assemble.
- Fig. 5 em with exemplary embodiment can be seen from a bellows 27 integrally formed on a membrane 26 '. Because of the one-piece construction with the membrane 26 ', an assembly process in the area of the movable wall 11 is also omitted here. It should be particularly pointed out that the bellows body 28 can increasingly be rolled on the outer circumference of the connecting channel 15 in the course of an axial operating movement of the wall 11 in the direction of the partition wall 5 is. This measure thus ensures a quasi-friction-free and in particular injury-insensitive seal between the connecting channel 15 and the movable wall 8 and its membrane.
- the principle of task separation according to the invention allows the cross section of the connecting channel to be optimized independently of fastening means or other components of the brake booster with regard to the control behavior (time until modulation). For example, particularly large cross sections for rapid pressure equalization are conceivable, the resulting noise being minimized due to the free, in particular circular, flow cross section.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99940009A EP1097071A2 (de) | 1998-07-20 | 1999-07-15 | Pneumatischer kraftverstärker in tandembauweise |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19832357.3 | 1998-07-20 | ||
| DE1998132357 DE19832357A1 (de) | 1998-07-20 | 1998-07-20 | Pneumatischer Kraftverstärker in Tandembauweise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000005115A2 true WO2000005115A2 (de) | 2000-02-03 |
| WO2000005115A3 WO2000005115A3 (de) | 2000-05-04 |
Family
ID=7874523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1999/004996 Ceased WO2000005115A2 (de) | 1998-07-20 | 1999-07-15 | Pneumatischer kraftverstärker in tandembauweise |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1097071A2 (de) |
| DE (1) | DE19832357A1 (de) |
| WO (1) | WO2000005115A2 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4618527B2 (ja) * | 2001-04-27 | 2011-01-26 | 日立オートモティブシステムズ株式会社 | 気圧式倍力装置 |
| DE10359176A1 (de) * | 2003-05-14 | 2004-12-09 | Continental Teves Ag & Co. Ohg | Pneumatischer Bremskraftverstärker |
| DE10329488A1 (de) * | 2003-07-01 | 2005-01-27 | Continental Teves Ag & Co. Ohg | Bremskraftverstärker |
| DE102009037232A1 (de) * | 2008-09-26 | 2010-04-01 | Continental Teves Ag & Co. Ohg | Pneumatischer Bremskraftverstärker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327997A2 (de) | 1988-02-05 | 1989-08-16 | LUCAS INDUSTRIES public limited company | Pneumatischer Kraftverstärker in Tandembauweise, insbesondere für hydraulische Fahrzeug-Bremsanlagen |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3388635A (en) * | 1966-05-02 | 1968-06-18 | Bendix Corp | Fluid pressure motor |
| US3603208A (en) * | 1969-06-30 | 1971-09-07 | Bendix Corp | Servomotor having a one-piece center plate |
| ES480732A2 (es) * | 1978-05-20 | 1980-07-01 | Girling Ltd | Servo-amplificador de fuerza para sistema de frenos de vehi-culo. |
| DE2830262A1 (de) * | 1978-07-10 | 1980-01-24 | Teves Gmbh Alfred | Bremskraftverstaerker fuer ein kraftfahrzeug |
| DE2837911A1 (de) * | 1978-08-31 | 1980-03-13 | Teves Gmbh Alfred | Bremskraftverstaerker fuer ein kraftfahrzeug |
| ZA796067B (en) * | 1978-11-21 | 1980-10-29 | Lucas Industries Ltd | Servo boosters for vehicle braking systems |
| DE8801464U1 (de) * | 1988-02-05 | 1989-06-08 | Lucas Industries P.L.C., Birmingham, West Midlands | Pneumatischer Kraftverstärker in Tandembauweise, insbesondere für hydraulische Fahrzeug-Bremsanlagen |
| DE4202820C2 (de) * | 1992-01-31 | 1996-09-05 | Lucas Ind Plc | Betätigungseinheit für Kraftfahrzeugbremsen |
| FR2711743B1 (fr) * | 1993-10-22 | 1996-01-05 | Alliedsignal Europ Services | Servomoteur doté d'un soufflet à montage rapide. |
| DE4420112A1 (de) * | 1994-06-09 | 1995-12-14 | Teves Gmbh Alfred | Betätigungseinheit für eine hydraulische Bremsanlage |
| DE19524492B4 (de) * | 1995-07-05 | 2009-01-02 | Daimler Ag | Bremskraftverstärker mit Verbindungsbolzen |
-
1998
- 1998-07-20 DE DE1998132357 patent/DE19832357A1/de not_active Withdrawn
-
1999
- 1999-07-15 WO PCT/EP1999/004996 patent/WO2000005115A2/de not_active Ceased
- 1999-07-15 EP EP99940009A patent/EP1097071A2/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327997A2 (de) | 1988-02-05 | 1989-08-16 | LUCAS INDUSTRIES public limited company | Pneumatischer Kraftverstärker in Tandembauweise, insbesondere für hydraulische Fahrzeug-Bremsanlagen |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19832357A1 (de) | 2000-01-27 |
| WO2000005115A3 (de) | 2000-05-04 |
| EP1097071A2 (de) | 2001-05-09 |
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