WO1997015482A1 - Unterdruckbremskraftverstärker für kraftfahrzeuge - Google Patents
Unterdruckbremskraftverstärker für kraftfahrzeuge Download PDFInfo
- Publication number
- WO1997015482A1 WO1997015482A1 PCT/EP1996/004371 EP9604371W WO9715482A1 WO 1997015482 A1 WO1997015482 A1 WO 1997015482A1 EP 9604371 W EP9604371 W EP 9604371W WO 9715482 A1 WO9715482 A1 WO 9715482A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum
- chamber
- brake booster
- sleeve
- return spring
- Prior art date
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
-
- 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
- B60T13/563—Vacuum systems indirect, i.e. vacuum booster units with multiple booster units, e.g. tandem booster units
-
- 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
- B60T13/569—Vacuum systems indirect, i.e. vacuum booster units characterised by piston details, e.g. construction, mounting of diaphragm
Definitions
- the invention relates to a vacuum brake booster for motor vehicles with a first and a second booster chamber, which are separated from one another by means of a partition, a first and a second movable wall, which divide the first and the second booster chamber into a first vacuum chamber and a first working chamber Subdivide the second vacuum chamber and a second working chamber and are each formed by a diaphragm plate and a rolling diaphragm lying in it, the first movable wall on a control housing accommodating a control valve and the second movable wall on a control housing in which extends through the dividing wall force-transmitting connection standing connecting tube are arranged.
- Such a vacuum brake booster is known from DE-OS 43 41 838.
- the special feature of the known brake booster is that the first rolling diaphragm is connected to the edge of its radially inner bead which is remote from the first diaphragm plate or the area of the attachment of the connecting tube to the control housing in such a way that it delimits a pneumatic space with the first diaphragm plate , which can be acted upon by the pressure prevailing in the vacuum chambers.
- the excess material of the roll membrane due to radial expansion of the bead is brought into a structurally predetermined position.
- clearly audible friction noises are felt to be less advantageous, caused by the return spring or its being bent
- This object is achieved in that a sleeve made of slidable plastic is provided in the radial direction within the connecting tube.
- the sleeve is formed in one piece with a guide plate which is axially in contact with the control housing and which serves to guide a push rod which transmits the output force of the brake booster and on which the return spring is supported.
- a rapid evacuation of the working chambers is achieved in a further advantageous embodiment of the invention in that the sleeve is provided with venting cutouts in the area of the connection to the guide plate.
- FIG. 1 shows an axial section through an embodiment of the vacuum brake booster according to the invention
- FIG. 2 and the sleeve shown in Fig. 1 in a view Fig. 3 from the direction "A" of Fig. 1 or in a side view.
- the tandem brake booster shown in the drawing has an booster housing which is formed by two shell-shaped housing halves 1, 2 which are held together on their circumference, for example by launches.
- the interior of the booster housing is divided into a rear (brake pedal-side) booster chamber 24 and a front (master cylinder-side) booster chamber 25 by means of a partition 16 arranged therein, the rear booster chamber 24 being separated by a first movable wall 4 into a first vacuum chamber 28 of constant pressure and one first working chamber 29 of variable pressure and the front booster chamber 25 are divided by a second movable wall 5 into a second vacuum chamber 30 and a second working chamber 31.
- the front housing half 1 is provided with a vacuum connection 37, by means of which the second vacuum chamber 30 can be connected to a suitable vacuum source, for example an intake manifold of the motor vehicle engine.
- a control valve 6 which can be actuated by an actuating rod 7 is accommodated in a control housing 3 which is sealed in the rear housing half 2 and comprises a first sealing seat 9 which is formed on the control housing 3 and a second sealing seat 10 which is formed on an axially displaceable valve piston 8 connected to the actuating rod 7 and a poppet valve body 11 which interacts with both sealing seats 9, 10 and which is pressed by means of a valve spring 34 against the sealing seats 9, 10, which is supported on a holding sleeve 33 which holds the poppet valve body 11 in the control housing 3.
- a sealing ring 17 arranged in the radially inner region of the dividing wall 17 provides for the sealing of the dividing wall 16 with respect to the connecting pipe 18.
- a piston rod return spring 36 is provided, which is effectively arranged between the holding sleeve 33 and the actuating rod 7 and whose force biases the valve piston 8 or whose valve seat 10 provides with respect to the poppet valve body 11.
- valve piston 8 The restoring movement of the valve piston 8 is limited by a transverse member 19, preferably U-shaped, laterally inserted into the control housing 3 perpendicular to the longitudinal axis of the brake booster according to the invention, which in the release position rests axially on an annular region of the rear or brake pedal-side housing half 2, its cylindrical extension a sealing ring 20 which seals the control housing 3 from the atmosphere.
- the second movable wall 5 consists of a second membrane plate 14 and a second one Roll membrane 15 and is arranged on the front, or in the second vacuum chamber 30 protruding end of a, preferably metallic connection tube 18 in power transmission connection with the control housing 3.
- Both vacuum chambers 28, 30 are connected to one another by means of openings 35 formed in the fastening area of the connecting tube 18 on the control housing, while a pneumatic connection between the two working chambers 29, 31 via the fastening area of the partition 16 in the booster housing or in the connection area of the two housing halves 1 , 2 trained channels 38 takes place.
- the output force of the brake booster is transmitted to an actuating piston of a master brake cylinder of the brake system (not shown), which is attached to the vacuum-side or front housing half 1 of the brake booster housing, via a rubber-elastic reaction disk 21 accommodated in an end recess of the control housing 3 and a pressure rod 22 having a head flange 23 .
- a return spring 32 holds the movable walls 4 and 5 in the starting position shown. It is supported, on the one hand, on the vacuum-side housing half 1 and, on the other hand, on a guide plate 26 which bears axially against the control housing 3 and which serves for the radial guidance of the previously mentioned push rod 22.
- the guide plate 26, which is preferably made of a slidable plastic, merges in its radially outer region into a cylindrical sleeve 27 which bears in the radial direction on the inner wall of the connecting tube 18 and thus radially encompasses the part of the return spring 32 which projects into the interior of the connecting tube 18. As can be seen in particular from FIGS.
- the guide plate 26 has openings 39 in its axially abutting area on the end face of the control housing 3, which, interacting with vacuum channels 40 formed in the control housing 3, rapidly evacuate the working chambers 29, 31 enable.
- ventilation cutouts 41 are provided in the transition area between the guide plate 26 and the sleeve 27, which form a pneumatic connection between the first (28) and the second vacuum chamber 30.
- Centering ribs 42 are preferably formed between the ventilation recesses 41, which ensure precise centering of the return spring 32 within the sleeve 27.
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 |
---|---|---|---|
EP96934585A EP0812277A1 (de) | 1995-10-25 | 1996-10-09 | Unterdruckbremskraftverstärker für kraftfahrzeuge |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19539601.4 | 1995-10-25 | ||
DE19539601A DE19539601B4 (de) | 1995-10-25 | 1995-10-25 | Unterdruckbremskraftverstärker für Kraftfahrzeuge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997015482A1 true WO1997015482A1 (de) | 1997-05-01 |
Family
ID=7775662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/004371 WO1997015482A1 (de) | 1995-10-25 | 1996-10-09 | Unterdruckbremskraftverstärker für kraftfahrzeuge |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0812277A1 (de) |
DE (1) | DE19539601B4 (de) |
WO (1) | WO1997015482A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2817219B1 (fr) * | 2000-11-29 | 2003-01-10 | Bosch Gmbh Robert | Servofrein pneumatique a vibrations reduites |
DE102005054758A1 (de) * | 2005-11-17 | 2007-05-24 | Continental Teves Ag & Co. Ohg | Pneumatischer Bremskraftverstärker in Tandembauweise |
DE102006016545B3 (de) * | 2006-04-07 | 2007-05-16 | Lucas Automotive Gmbh | Bremskraftverstärkungseinrichtung mit Dämpfungselement |
DE102009037232A1 (de) | 2008-09-26 | 2010-04-01 | Continental Teves Ag & Co. Ohg | Pneumatischer Bremskraftverstärker |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4716814A (en) * | 1984-02-09 | 1988-01-05 | Jidosha Kiki Co., Ltd. | Muffler for brake booster system |
DE4032534A1 (de) * | 1990-10-13 | 1992-04-16 | Teves Gmbh Alfred | Unterdruck-bremskraftverstaerker |
DE4341838A1 (de) * | 1993-12-08 | 1995-06-14 | Teves Gmbh Alfred | Unterdruckbremskraftverstärker für Kraftfahrzeuge |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56108341A (en) * | 1980-02-01 | 1981-08-27 | Sumitomo Electric Ind Ltd | Vacuum booster |
DE3913263A1 (de) * | 1989-04-22 | 1990-10-25 | Teves Gmbh Alfred | Unterdruck-bremskraftverstaerker fuer kraftfahrzeuge |
JP2584072Y2 (ja) * | 1993-10-05 | 1998-10-30 | 日信工業株式会社 | タンデム型負圧ブースタ |
-
1995
- 1995-10-25 DE DE19539601A patent/DE19539601B4/de not_active Expired - Lifetime
-
1996
- 1996-10-09 WO PCT/EP1996/004371 patent/WO1997015482A1/de not_active Application Discontinuation
- 1996-10-09 EP EP96934585A patent/EP0812277A1/de not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4716814A (en) * | 1984-02-09 | 1988-01-05 | Jidosha Kiki Co., Ltd. | Muffler for brake booster system |
DE4032534A1 (de) * | 1990-10-13 | 1992-04-16 | Teves Gmbh Alfred | Unterdruck-bremskraftverstaerker |
DE4341838A1 (de) * | 1993-12-08 | 1995-06-14 | Teves Gmbh Alfred | Unterdruckbremskraftverstärker für Kraftfahrzeuge |
Also Published As
Publication number | Publication date |
---|---|
EP0812277A1 (de) | 1997-12-17 |
DE19539601A1 (de) | 1997-04-30 |
DE19539601B4 (de) | 2009-05-20 |
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