WO2009052941A1 - Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage - Google Patents
Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage Download PDFInfo
- Publication number
- WO2009052941A1 WO2009052941A1 PCT/EP2008/008448 EP2008008448W WO2009052941A1 WO 2009052941 A1 WO2009052941 A1 WO 2009052941A1 EP 2008008448 W EP2008008448 W EP 2008008448W WO 2009052941 A1 WO2009052941 A1 WO 2009052941A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- movable wall
- chamber
- vacuum
- brake booster
- working chamber
- 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
- B60T13/563—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
- B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
-
- 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 present invention relates to a vacuum brake booster for a motor vehicle brake system with
- a force input element which can be coupled to a brake pedal
- control valve device which can be actuated in accordance with a displacement of the force input element, a tandem chamber arrangement with a first and a second working chamber and a first and second vacuum chamber and with
- a force output member for outputting an actuating force to a master brake cylinder assembly, wherein the first working chamber and the first vacuum chamber are separated from each other via a first movable wall and the second working chamber and the second vacuum chamber via a second movable wall and are selectively connectable to each other via the control valve means and wherein at least one pneumatic connecting element is provided, via which the first working chamber is permanently connected to the second working chamber.
- Such a vacuum brake booster is known from the prior art.
- document DE 29 42 024 A1 shows a vacuum brake booster with a tandem chamber arrangement in FIG. 3.
- this vacuum brake booster a pneumatic connection between corresponding working chambers of the tandem chamber arrangement is achieved by hollow draw bolts.
- tension bolts it has been found that with more modern vacuum brake boosters more and more of the tension bolts are to be omitted and that only corresponding fastening bolts are externally attached to the booster housing, which does not extend through the booster housing.
- the pneumatic connecting element is substantially fixedly mounted on both movable walls, which move largely synchronously with each other. This ensures a stable arrangement with a reliable connection of the two working chambers.
- a development of the invention provides that the pneumatic connecting element is made hollow and sealingly guided in a position-stable partition wall, wherein the partition wall sealingly separates the first vacuum chamber from the second working chamber.
- the pneumatic connecting element is therefore passed through the storage-stable partition, wherein in this a corresponding sealing element is arranged.
- the pneumatic connecting element is mounted at three points, namely at its attachment points to the first and second movable wall and by its relatively movable bearing within the sealing element in the partition. This makes it possible to achieve reliable guidance and prevent jamming within the brake booster.
- the pneumatic connecting element has a bearing flange, with which it bears against the first movable wall.
- the pneumatic connecting element can be securely connected to the first movable wall.
- a first circumferential annular seal is arranged between the first movable wall and the pneumatic connecting element. Depending on your request can this ring seal be stiffer or less rigid, so as to adjust the quality of the leadership of the pneumatic connecting element as desired.
- the first circumferential ring seal is formed integrally with the first movable wall.
- an embodiment of the invention provides that the pneumatic connecting element has an end flange, with which it bears sealingly against the second movable wall.
- a second circumferential annular seal may also be made in this context for a second circumferential annular seal to be arranged between the second movable wall and the pneumatic connecting element.
- the stiffness of the second circumferential ring seal is to be selected in order to adjust the guiding properties as desired.
- the second circumferential ring seal is formed integrally with the second movable wall.
- the at least one pneumatic connecting element must be sealingly guided in the dividing wall.
- a circumferential sliding seal is provided in the partition wall, which surrounds the pneumatic connecting element sealingly and relatively movable.
- this circumferential sliding seal can be made stiffer or less stiff, whereby the sealing properties but also the leadership properties can be determined as desired.
- the pneumatic sealing element has a first pipe section and a smaller diameter compared to the first pipe section pipe section, wherein the two pipe sections overlap in an axial region and are connected to each other via at least one connecting web.
- at least one connecting channel is provided between the two pipe sections in addition to the at least one connecting web, which opens into the second working chamber.
- Working chamber opens and that the second tube section is closed at the front side relative to the second vacuum chamber.
- Figure 1 is an axially-containing partial sectional view of a vacuum brake booster according to the invention.
- FIG. 2 shows a detail view of a cross section to the pneumatic sealing element according to FIG. 1.
- a vacuum brake booster according to the invention is shown in an axis-containing partial section and designated generally by 10.
- This comprises an amplifier housing 12, in which a force input member 14 is inserted along a longitudinal axis A.
- the force input member 14 opens into a control valve device 16, not shown, which will be explained in more detail below in their operation.
- the control valve device 16 has a control valve housing 18, which is movable in the booster housing 12 and sealingly guided with a seal 20. From the control valve housing 18 is a force output member 22 is made, which is connectable to a master cylinder assembly, not shown, and via which a braking force can be transmitted to the master cylinder assembly.
- a tandem chamber arrangement 24 is arranged in the booster housing 12. This comprises a first working chamber 26 and a first vacuum chamber 28, which are pneumatically separated from each other via a first movable wall 30.
- the tandem chamber assembly 24 further includes a second working chamber 32 which is separated from a second vacuum chamber 36 by a second movable wall 34.
- a return spring 38 is arranged, which biases the control valve housing 18 in the starting position in Figure 1.
- the two chamber arrangements which consist of first working chamber 30 and vacuum chamber 28 and second working chamber 32 and vacuum chamber 36 are pneumatically separated from each other by a fixed in the booster housing 12 storage stable partition 40.
- the first working chamber 26 is pneumatically interconnected to the second working chamber 32. This happens according to the invention via a pneumatic connecting element 42.
- the pneumatic connecting element 42 has at its right end in FIG. 1 a flange 44, with which it rests against the first movable wall 30. It is sealingly received in a sealing collar 46, with the sealing collar 46 integrally connected to, ie integrally formed with, an elastomeric membrane of the movable wall 30.
- the pneumatic connecting element 42 is tubular, wherein it has a first pipe section 48 and a second pipe section 50.
- the first pipe section 48 opens with its hollow interior into the first working chamber 26.
- the second pipe section 50 is sealed at its left in Figure 1 end with a flange-like end wall 52. Also, the second pipe section 50 is sealingly received in a sealing sleeve 54, which rests on the one hand on the flange-like end wall 52 and on the other hand, the pipe section 50 engages end sealingly.
- the sleeve 54 is integrally formed with an elastomeric membrane of the second movable wall 34.
- the larger diameter first pipe section 48 of the pneumatic connecting element 42 is sealingly, but relatively movably received in an annular seal 56.
- the ring seal 56 is sealingly held in an opening of the position-stable partition 40.
- the two movable walls 30 and 34 are fixedly connected to the control valve housing 18 at their radially inner portions 58 and 60 for co-movement.
- a force applied to the movable walls 30 and 34, resulting from a pressure difference between the respective working chamber and vacuum chamber, be transmitted to the control valve housing 18, the resulting force on the force output member 22 in addition to the introduced via the force input member 14 actuating force can be delivered to the master cylinder assembly, not shown.
- FIG. 2 shows a sectional view through the pneumatic connecting element 42, as illustrated in FIG. 1 along the section line IHI. It can be seen there that the first pipe section 48, on which the end of the flange 44 is arranged, is connected to the second pipe section 50 via four radially extending connecting webs 62. Between these connecting webs 62 four ring-segment-like connecting channels 64 are arranged, via which a pneumatic connection of the first working chamber 26 through the hollow pipe section 48 into the second working chamber 32 is possible, as shown by the dashed arrow in Figure 1.
- fastening bolts 66 and 68 attached to the booster housing 12 can be seen.
- the fastening bolts 66 connect brake booster 10 to a dashboard of the motor vehicle.
- With the fastening bolts 68 a connection is made on the amplifier housing.
- the two working chambers 26 and 32 are connected to the ambient atmosphere by "opening" the control valve 16, so that in these against the vacuum chambers 28 and 36, an overpressure builds, each at the first and second movable Wall 30 and 34.
- the pneumatic connecting element 42 Via the pneumatic connecting element 42, there is a pressure equalization in the two working chambers 26 and 32, corresponding to the broken-line arrow in FIG Sealing sleeves 46 and 54 are sealingly connected respectively to the first movable wall 30 and the second movable wall 34.
- the ring seal 56 provides a sealing guidance of the tubular section 42.
- the pneumatic connecting element 42 thus provides a reliable pneumatic connection between the two working chambers 26 and 32, which allows the movable walls 30 and 32 to move substantially synchronously with each other, their movement via the sealing element 56 in the storage-stable partition 40 is guided. It is understood that a plurality of pneumatic connecting elements 42 may be distributed over the circumference of the vacuum brake booster 10 within the chamber assembly 24. As a result, a jam-free guidance of the movement of the movable walls 30 and 34 in the booster housing 12 is supported.
- the inventive design of the pneumatic connecting element 42 for a permanent pneumatic connection of the two working chambers 26 and 32 which additionally achieves a stabilization of the movement of the movable walls 30 and 32 and beyond no calls through the amplifier housing 12 extending therethrough pull bolt calls, as about the case in the prior art.
- This offers more freedom in the construction tion of the vacuum brake booster 10 according to the invention in contrast to the prior art.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT08802805T ATE508021T1 (de) | 2007-10-18 | 2008-10-07 | Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage |
| CN2008801120037A CN101835663B (zh) | 2007-10-18 | 2008-10-07 | 用于车辆制动系统的真空制动力助力器 |
| EP08802805A EP2197719B1 (de) | 2007-10-18 | 2008-10-07 | Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage |
| US12/738,446 US8661964B2 (en) | 2007-10-18 | 2008-10-07 | Vacuum-assisted brake-force booster for a motor-vehicle braking system |
| DE502008003452T DE502008003452D1 (de) | 2007-10-18 | 2008-10-07 | Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007049960A DE102007049960A1 (de) | 2007-10-18 | 2007-10-18 | Unterdruckbremskraftverstärker für eine Kraftfahrzeugbremsanlage |
| DE102007049960.6 | 2007-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009052941A1 true WO2009052941A1 (de) | 2009-04-30 |
Family
ID=40366585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/008448 Ceased WO2009052941A1 (de) | 2007-10-18 | 2008-10-07 | Unterdruckbremskraftverstärker für eine kraftfahrzeugbremsanlage |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8661964B2 (de) |
| EP (1) | EP2197719B1 (de) |
| CN (1) | CN101835663B (de) |
| AT (1) | ATE508021T1 (de) |
| DE (2) | DE102007049960A1 (de) |
| WO (1) | WO2009052941A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011016830A1 (de) * | 2011-04-12 | 2012-10-18 | Lucas Automotive Gmbh | Bremskraftverstärker mit stellungsabhängigem Druckausgleich |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484509A (en) * | 1978-08-31 | 1984-11-27 | Itt Industries, Inc. | Brake booster for an automotive vehicle |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA795365B (en) | 1978-10-18 | 1980-09-24 | Lucas Industries Ltd | Master cylinder assemblies for vehicle braking systems |
| JPS60169059U (ja) * | 1984-04-20 | 1985-11-09 | トキコ株式会社 | 気圧倍力装置 |
| GB2211905B (en) * | 1987-11-06 | 1992-02-26 | Nissin Kogyo Kk | Tandem-type vacuum booster |
| JP2623740B2 (ja) * | 1988-08-15 | 1997-06-25 | 自動車機器株式会社 | ブレーキ倍力装置 |
| JP2001514114A (ja) * | 1997-08-22 | 2001-09-11 | ルーカス・インダストリーズ・パブリック・リミテッド・カンパニー | 真空ブレーキブースタ |
| US6253656B1 (en) * | 1998-07-08 | 2001-07-03 | Lucas Industries Public Limited Company | Sensor assembly for a brake booster and brake booster equipped therewith |
| US6588317B2 (en) | 2001-11-09 | 2003-07-08 | Delphi Technologies, Inc. | Power booster sealing mechanism |
| US6755117B2 (en) | 2001-11-09 | 2004-06-29 | Delphi Technologies, Inc. | Tandem vacuum booster assembly including sleeve for air transfer between high pressure chambers |
| US6772674B2 (en) | 2002-11-12 | 2004-08-10 | Delphi Technologies, Inc. | Tie rod apparatus and method for assembling a vacuum booster |
| US7331275B2 (en) * | 2005-10-25 | 2008-02-19 | Delphi Technologies, Inc. | Brake booster with deformationally sealed passage and method of manufacture |
-
2007
- 2007-10-18 DE DE102007049960A patent/DE102007049960A1/de not_active Withdrawn
-
2008
- 2008-10-07 CN CN2008801120037A patent/CN101835663B/zh not_active Expired - Fee Related
- 2008-10-07 DE DE502008003452T patent/DE502008003452D1/de active Active
- 2008-10-07 US US12/738,446 patent/US8661964B2/en not_active Expired - Fee Related
- 2008-10-07 WO PCT/EP2008/008448 patent/WO2009052941A1/de not_active Ceased
- 2008-10-07 EP EP08802805A patent/EP2197719B1/de active Active
- 2008-10-07 AT AT08802805T patent/ATE508021T1/de active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484509A (en) * | 1978-08-31 | 1984-11-27 | Itt Industries, Inc. | Brake booster for an automotive vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2197719A1 (de) | 2010-06-23 |
| CN101835663A (zh) | 2010-09-15 |
| DE502008003452D1 (de) | 2011-06-16 |
| DE102007049960A1 (de) | 2009-04-23 |
| US20100242717A1 (en) | 2010-09-30 |
| EP2197719B1 (de) | 2011-05-04 |
| ATE508021T1 (de) | 2011-05-15 |
| US8661964B2 (en) | 2014-03-04 |
| CN101835663B (zh) | 2013-12-18 |
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