JPH04254245A - Negative pressure brake booster - Google Patents
Negative pressure brake boosterInfo
- Publication number
- JPH04254245A JPH04254245A JP3220600A JP22060091A JPH04254245A JP H04254245 A JPH04254245 A JP H04254245A JP 3220600 A JP3220600 A JP 3220600A JP 22060091 A JP22060091 A JP 22060091A JP H04254245 A JPH04254245 A JP H04254245A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- brake booster
- booster
- housing
- pressure brake
- 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- ZBMRKNMTMPPMMK-UHFFFAOYSA-N 2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid;azane Chemical compound [NH4+].CP(O)(=O)CCC(N)C([O-])=O ZBMRKNMTMPPMMK-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はブースタハウジング内に
，圧力一定の負圧室と圧力可変の作動室と、制御弁ハウ
ジング内に組込みまれた制御弁とを備え、上記制御弁ハ
ウジングはブーツによって保護されているブースタハウ
ジングからの突出部を有し、上記ブーツはその一方が上
記ブースタハウジングに，他方が上記制御弁を作動させ
るピストンに夫々密接固定されている負圧ブレーキブー
スタに関する。[Industrial Application Field] The present invention includes a negative pressure chamber with a constant pressure, an operating chamber with a variable pressure, and a control valve built into a control valve housing in a booster housing. The invention relates to a vacuum brake booster having a protected projection from the booster housing, the boot being closely fixed on the one hand to the booster housing and on the other hand to the piston actuating the control valve.
【０００２】0002
【従来の技術】この種タイプの負圧ブレーキブースタは
本願出願人による先の特許出願Ｐ３９２３８４３．１．
によって既に知られている。公知のブレーキブースタは
その作動に際し，エァは、上記ブースタを取付ける自動
車のスプラッシュボードの近辺から取り入れられ、ブー
ツ内部に設けられるエァフィルタ及びブースタにブーツ
を取付けるためのスペーサを介して，ブレーキブースタ
の横方向軸線と平行に流れ、制御弁ハウジングの端部に
形成された大径開口部を伝わって，制御弁に供給される
。これによって，流入エァにより斉される騒音のレベル
は、自動車室内において大幅に低減され、又乗客にもそ
の音は殆ど達することがない。2. Description of the Related Art This type of negative pressure brake booster is disclosed in the earlier patent application P3923843.1 filed by the present applicant.
already known by. When the known brake booster operates, air is taken in from the vicinity of the splash board of the automobile to which the booster is attached, and air is introduced in the lateral direction of the brake booster through an air filter provided inside the boot and a spacer for attaching the boot to the booster. It flows parallel to the axis and is supplied to the control valve through a large diameter opening formed in the end of the control valve housing. As a result, the level of noise emitted by the incoming air is significantly reduced in the vehicle interior, and the noise hardly reaches the passengers.
【０００３】しかしながら第１に，上記スペーサの複雑
な組立ては、かなりの製造コストを要するこの種ブレー
キブースタにおいて若干不都合な点として考られれてい
る。さらに他の欠点は、上記スペーサを採用するために
，径方向に増大するブースタの設備寸法（スプラッシュ
ボード壁の開口部から突出するブースタネック部の径の
）に起因して取付けスペースの要量が増大することにあ
る。さらに又，他の欠点としては、結局のところ，上記
スペーサの設計如何にもよるが，結果的に不都合な応答
時間をもたらす種々の方向変化を起こさせるところの，
流入エァの不都合な流れに在る。Firstly, however, the complicated assembly of the spacer is considered a slight disadvantage in brake boosters of this type, which requires considerable manufacturing costs. Yet another drawback is that the use of the above spacers increases the installation space requirements due to the increased radial dimensions of the booster equipment (the diameter of the booster neck protruding from the opening in the splashboard wall). It is about increasing. Furthermore, another disadvantage is that, depending on the design of the spacer, it can cause various directional changes resulting in disadvantageous response times.
There is an unfavorable flow of incoming air.
【０００４】0004
【発明が解決しようとする課題】上述のことから本願発
明の目的は、前記従来タイプのブレーキブースタを、組
立てがより簡単で，かつ前記取付けスペースの縮小をも
同時に達成することができるように改良することにあり
、特に，作動エァの流入部分が、その流れに都合良く形
成され、それによってブレーキ操作に対する応答時間が
短縮されるようにしたことにある。SUMMARY OF THE INVENTION In light of the above, an object of the present invention is to improve the conventional brake booster so that assembly is easier and the installation space can be reduced at the same time. In particular, the inlet section for the working air is designed to be advantageous to its flow, thereby shortening the response time to the brake operation.
【０００５】[0005]
【課題を解決するための手段】本発明の上記目的は、ブ
ースタハウジングへの取付け部分における径方向のエァ
取入れ口を具備するブーツによって達成される。又この
ことは構造がコンパクトで組立て容易なことに特徴を有
するブレーキブースタを得るということに適っている。SUMMARY OF THE INVENTION The above objects of the invention are achieved by a boot having a radial air intake at the attachment to the booster housing. This is also suitable for obtaining a brake booster characterized by a compact structure and easy assembly.
【０００６】本発明の上記課題を適切に解決するための
手段として，ブーツの内側径方向，或いは外側径方向の
いずれかに配置され、上記エァ取入れ口を覆うための環
状エァフィルタを備えることが必要である。これによっ
て，ブレーキブースタの内部に侵入し，操作の信頼性を
損うことになる全ての汚染物質は、流入エァから取り除
かれる。このフィルタ部材はブーツに形成されたビード
により適当な方法で保持される。[0006] As a means for appropriately solving the above problems of the present invention, it is necessary to provide an annular air filter disposed either in the inner radial direction or in the outer radial direction of the boot to cover the air intake port. It is. This removes from the incoming air any contaminants that would otherwise enter the interior of the brake booster and impair operational reliability. The filter element is held in a suitable manner by a bead formed in the boot.
【０００７】騒音レベルを低減させることは、上記フィ
ルタ部材を吸音材で形成するという本発明の課題を解決
するための他の手段によって達成される。[0007] Reducing the noise level is achieved by another means for solving the problem of the invention, that is, the filter element is made of a sound-absorbing material.
【０００８】又さらに，この騒音レベルの低減は、終局
的には，他の発明的特徴、即ちブースタハウジングから
突出する制御ハウジング端部にノイズダンパーを設ける
ことにより達成され、このダンパーは好ましくはリング
により形成され、又，例えば発泡材によって作られ、さ
らに上記エァダクトはブレーキブースタの横軸と平行に
延出するように構成されている。Furthermore, this reduction in noise level is ultimately achieved by another inventive feature, namely the provision of a noise damper at the end of the control housing projecting from the booster housing, which damper is preferably a ring. The brake booster is made of a foamed material, and the air duct is configured to extend parallel to the transverse axis of the brake booster.
【０００９】[0009]
【実施例】以下，本発明を図示の１実施例に基いて詳細
に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on one embodiment shown in the drawings.
【００１０】図１はブレーキブースタの構成を明確に示
すための拡大断面図であり、ブレーキブースタのブース
タハウジング１は、軸方向に移動可能な壁２によって，
作動室３と負圧室４とに区画形成される。上記可動壁２
は深絞り金属箔からなる可撓性ダイアフラム板８と該板
に接合する可撓性ダイアフラム１８からなり、又，図示
されていないが，ダイアフラム板８の外周とブースタハ
ウジング１間はシーリングが設けられており、転動型ダ
イアフラムを構成している。FIG. 1 is an enlarged sectional view to clearly show the structure of the brake booster, in which a booster housing 1 of the brake booster is separated by an axially movable wall 2.
It is divided into an operating chamber 3 and a negative pressure chamber 4. Movable wall 2 above
consists of a flexible diaphragm plate 8 made of deep-drawn metal foil and a flexible diaphragm 18 bonded to the plate, and although not shown, a sealing is provided between the outer periphery of the diaphragm plate 8 and the booster housing 1. It constitutes a rolling diaphragm.
【００１１】作動ロッド７によって操作される制御弁１
２は、ブースタハウジング１内に密接して支持される制
御ハウジング５内に組込まれており、制御ハウジング５
に形成された第１のシーリングシート１５と作動ロッド
７に結合するバルブピストン９に形成された第２のシー
リングシート１６と、上記シーリングシート１５，１６
と協同して作動するポペットバルブ１０とからなり、上
記ポペットバルブ１０はその取付け部２１に一端が支持
された圧縮ばね２２によって，上記シーリングシート１
５，１６に押圧されている。図示の不作動位置において
，上記作動室３は制御ハウジング５の横方向に延出する
通路２８を介して負圧室４に連通している。Control valve 1 operated by actuating rod 7
2 is incorporated into a control housing 5 which is closely supported within the booster housing 1, and the control housing 5
a first sealing seat 15 formed on the valve piston 9 connected to the actuation rod 7; and a second sealing seat 16 formed on the valve piston 9 coupled to the actuating rod 7;
The poppet valve 10 operates in cooperation with the sealing seat 1 by means of a compression spring 22 whose one end is supported by the mounting portion 21 of the poppet valve 10.
5, 16 is pressed. In the illustrated inoperative position, the working chamber 3 communicates with the negative pressure chamber 4 via a passage 28 extending laterally in the control housing 5 .
【００１２】制御ハウジング５の前方に接合されている
弾性ゴムの反動ディスク６，及びヘッドフランジ２３を
有するプッシュロッド１４を介して，ブレーキ力は、パ
ワーブレーキシステムのブースタ負圧側に取付けられて
いるマスタシリンダ（図示せず）の作動ピストンに伝達
される。上記作動ピストン７に導入される入力は、バル
ブピストン９と反動ディスク６間に介在する比率変換デ
ィスク２０によって，反動ディスク６に伝達される。Braking force is transferred to a master mounted on the booster suction side of the power brake system via an elastic rubber reaction disc 6 joined to the front of the control housing 5 and a push rod 14 with a head flange 23. It is transmitted to the actuating piston of a cylinder (not shown). The input introduced into the working piston 7 is transmitted to the reaction disk 6 by means of a ratio conversion disk 20 interposed between the valve piston 9 and the reaction disk 6.
【００１３】ブースタハウジング１の負圧側に位置する
終壁のフランジに支持されたリセットばね２６（概略的
に図示する）は、図示の初期位置においては可動壁２を
支持している。一方，バルブピストン９と制御ハウジン
グ５に形成された支持面との間に第２の圧縮ばね２７が
設けられており、このばねの力はバルブピストン９を偏
倚させ、又ポペットバルブ１０との関係においてバルブ
シート１６を偏倚させる。A reset spring 26 (shown schematically) supported on a flange of the end wall on the suction side of the booster housing 1 supports the movable wall 2 in the initial position shown. On the other hand, a second compression spring 27 is provided between the valve piston 9 and a support surface formed in the control housing 5, the force of which biases the valve piston 9 and also biases the relationship with the poppet valve 10. The valve seat 16 is biased at.
【００１４】制御弁１２の作動時，作動室３を大気に連
通させるため、略，径方向に延出する通路２９が制御ハ
ウジングに形成される。A generally radially extending passageway 29 is formed in the control housing to communicate the working chamber 3 with the atmosphere during operation of the control valve 12.
【００１５】さらに図面から明らかなように，ブースタ
ハウジング１から突出する制御ハウジング５部分は、一
方が作動ロッド７に形成された環状溝に固定され，他方
がブースタハウジング１に取付けられている弾性ブーツ
１９によって汚染，湿気等から保護されている。ブーツ
１９は、ブースタハウジング１に対するその取付け領域
に、径方向のエァ取入れ口１３が多数設けられており、
これらはその周方向に均等に配置され内部へのエァの流
入を容易にしている。上記エァ取入れ口１３に対向する
内側径方向に、設けられる環状フィルタ部材１１は、好
適な例として，ブーツ１９に形成されたビード１７によ
りブースタハウジング１の軸方向に接合保持され、又適
当な吸音材からなる。しかし又，このフィルタ部材１１
はその他の如何様な設計も可能であり、例えばブーツ１
９の外側径方向に配置させ，軸方向に対向する２つのビ
ードによって保持するようにしてもよい。As is further evident from the drawing, the part of the control housing 5 protruding from the booster housing 1 has an elastic boot fixed on one side in an annular groove formed in the actuating rod 7 and on the other side attached to the booster housing 1. 19 protects it from pollution, moisture, etc. The boot 19 is provided with a large number of radial air intake ports 13 in its attachment region to the booster housing 1.
These are arranged evenly in the circumferential direction to facilitate the flow of air into the interior. The annular filter member 11 provided in the inner radial direction facing the air intake port 13 is preferably joined and held in the axial direction of the booster housing 1 by a bead 17 formed on the boot 19, and is also provided with a suitable sound absorbing material. Made of wood. However, this filter member 11
Any other design is also possible, for example boots 1
9 and held by two axially opposing beads.
【００１６】さらに加えてノイズの低減を達成するため
，ブ々スタハウジング１から突出する制御ハウジングの
端部に、例えば，発泡材からなりリング状に形成された
ノイズダンパー２４を収納し、これにブレーキブースタ
の軸方向と平行に延びる多数のエァダクト２５を設けて
ブースタハウジング１内部へのエァの流入を容易にする
ことができる。In addition, in order to achieve noise reduction, a ring-shaped noise damper 24 made of a foam material, for example, is housed at the end of the control housing protruding from the buster housing 1. A large number of air ducts 25 extending parallel to the axial direction of the brake booster can be provided to facilitate the flow of air into the booster housing 1.
【図１】図１は本願発明の一実施例である負圧ブレーキ
ブースタの拡大断面図。FIG. 1 is an enlarged sectional view of a negative pressure brake booster that is an embodiment of the present invention.
１…ブースタハウジング、３…作動室、４…負圧室、５
…制御弁ハウジング、７…作動ロッド、１１…フィルタ
部材、１２…制御弁、１３…エァ取入れ口、１７…ビー
ド、１９…ブーツ、２４…ノイズダンパー、２５…エァ
ダクト。1... Booster housing, 3... Working chamber, 4... Negative pressure chamber, 5
... Control valve housing, 7... Operating rod, 11... Filter member, 12... Control valve, 13... Air intake, 17... Bead, 19... Boot, 24... Noise damper, 25... Air duct.
Claims (8)
負圧室と圧力可変の作動室と、制御弁ハウジング内に組
込みまれた制御弁とを備え、上記制御弁ハウジングは上
記ブースタハウジングから突出し，かつブーツによって
保護されている部分を有し、上記ブーツの一方は上記ブ
ースタハウジングに，その他方は上記制御弁を作動させ
るピストンに夫々密接固定されている負圧ブレーキブー
スタであって、上記ブーツ１９はブースタハウジング１
への上記取付け領域に径方向のエァ取入れ口１３を具備
することを特徴とする負圧ブレーキブースタ。Claim 1: A booster housing includes a negative pressure chamber with a constant pressure, an operating chamber with a variable pressure, and a control valve built into a control valve housing, the control valve housing protruding from the booster housing, and A negative pressure brake booster having a portion protected by a boot, one of which is closely fixed to the booster housing and the other to a piston for actuating the control valve, the boot 19 being Booster housing 1
A negative pressure brake booster, characterized in that it is provided with a radial air intake port 13 in the above-mentioned attachment region to the vacuum brake booster.
ルヤ部材１１を具備することを特徴とする請求項１記載
の負圧ブレーキブースタ。2. The negative pressure brake booster according to claim 1, further comprising an annular filter member 11 that covers the air intake port 13.
９の内側径方向に配置されていることを特徴とする請求
項２記載の負圧ブレーキブースタ。3. The filter member 11 is attached to the boot 1.
3. The negative pressure brake booster according to claim 2, wherein the negative pressure brake booster is disposed in the inner radial direction of the brake booster.
９の外側径方向に配置されていることを特徴とする請求
項２記載の負圧ブレーキブースタ。4. The filter member 11 is attached to the boot 1.
3. The negative pressure brake booster according to claim 2, wherein the negative pressure brake booster is disposed in the outer radial direction of the brake booster.
形成されたビード１７によって保持されていることを特
徴とする請求項３乃至４のいずれか１つに記載の負圧ブ
レーキブースタ。5. The negative pressure brake booster according to claim 3, wherein the filter member 11 is held by a bead 17 formed on the boot 19.
ることを特徴とする請求項１乃至５のいずれか１つに記
載の負圧ブレーキブースタ。6. The negative pressure brake booster according to claim 1, wherein the filter member 11 is made of a sound absorbing material.
ング１から突出する制御ハウジング５の端部に設けられ
ていることを特徴とする請求項１乃至６のいずれか１つ
に記載の負圧ブレーキブースタ。7. Negative pressure brake booster according to claim 1, characterized in that the noise damper (24) is provided at the end of the control housing (5) projecting from the booster housing (1).
ると共に，リング２４状に形成され、ブレーキブースタ
の横方向軸と平行に延出するエァダクト２５を具備する
ことを特徴とする請求項７記載の負圧ブレーキブースタ
。8. The noise damper according to claim 7, characterized in that the noise damper is made of a foamed material or the like, is formed in the shape of a ring 24, and is provided with an air duct 25 extending parallel to the transverse axis of the brake booster. Negative pressure brake booster.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904027562 DE4027562C2 (en) | 1990-08-31 | 1990-08-31 | Vacuum brake booster |
| DE4027562:0 | 1990-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04254245A true JPH04254245A (en) | 1992-09-09 |
| JP3626209B2 JP3626209B2 (en) | 2005-03-02 |
Family
ID=6413295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22060091A Expired - Fee Related JP3626209B2 (en) | 1990-08-31 | 1991-08-30 | Negative pressure brake booster |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3626209B2 (en) |
| DE (1) | DE4027562C2 (en) |
| FR (1) | FR2666289B1 (en) |
| GB (1) | GB2247502A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632253U (en) * | 1992-10-02 | 1994-04-26 | 自動車機器株式会社 | Booster sound absorber |
| JPH11507887A (en) * | 1995-03-17 | 1999-07-13 | ボッシュ システム ド フラナージュ | Booster device with flow rate adaptable to direct air inlet |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2689076B1 (en) * | 1992-03-31 | 1994-05-20 | Bendix Europe Services Technique | PNEUMATIC SERVOMOTOR. |
| DE4440657A1 (en) * | 1994-11-14 | 1996-05-15 | Lucas Ind Plc | Operating mechanism for motor vehicle brake system |
| FR2727924A1 (en) * | 1994-12-09 | 1996-06-14 | Alliedsignal Europ Services | SERVOMOTOR WITH ADAPTIVE ADDITIONAL AIR INTAKE |
| KR0148885B1 (en) * | 1995-12-27 | 1998-09-15 | 정몽원 | Brake booster of a vehicle |
| DE19523309C2 (en) * | 1995-06-27 | 1998-12-03 | Bayerische Motoren Werke Ag | Braking device of a motor vehicle |
| DE10026863A1 (en) * | 2000-05-31 | 2001-12-13 | Moeller Flex Gmbh | Flexible shaped part eg bellows for covering length-adjustable systems eg brake boosters has one or more three-dimensional or flat filters covering ventilation openings |
| DE10161436C1 (en) * | 2001-12-14 | 2003-07-03 | Porsche Ag | Ansauggeräuschdämpfer |
| FR2869380B1 (en) * | 2004-04-21 | 2006-08-11 | Bosch Gmbh Robert | PNEUMATIC BRAKE ASSIST SERVOMOTOR FOR MOTOR VEHICLE, ARRANGEMENT AND METHOD FOR MOUNTING BELLOW ON SERVOMOTOR |
| DE102009051236A1 (en) | 2009-10-29 | 2011-05-12 | Lucas Automotive Gmbh | Vacuum brake booster for a motor vehicle brake system |
| FR3095629B1 (en) * | 2019-04-30 | 2021-04-16 | Psa Automobiles Sa | VARIABLE FILTERED AIR INTAKE VALVE FOR PNEUMATIC AMPLIFIER |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2845904A (en) * | 1956-05-03 | 1958-08-05 | Bendix Aviat Corp | Fluid pressure servo-motor |
| GB1022419A (en) * | 1962-11-21 | 1966-03-16 | Girling Ltd | Improvements in fluid-pressure operated boosters |
| GB1207573A (en) * | 1968-01-22 | 1970-10-07 | Automotive Prod Co Ltd | Improvements in and relating to fluid pressure operated servo motors |
| US3727516A (en) * | 1971-06-07 | 1973-04-17 | Bendix Corp | Cushioned valve plunger |
| JPS5642138Y2 (en) * | 1977-07-09 | 1981-10-02 | ||
| DE2918734C2 (en) * | 1979-05-09 | 1986-09-04 | Alfred Teves Gmbh, 6000 Frankfurt | Vacuum booster |
| IT1153083B (en) * | 1981-11-23 | 1987-01-14 | Lucas Ind Plc | VEHICLE BRAKE BOOSTER |
| JPH0333573Y2 (en) * | 1985-01-18 | 1991-07-16 | ||
| DE3704133A1 (en) * | 1987-02-11 | 1988-08-25 | Teves Gmbh Alfred | HYDRAULICALLY CONTROLLED OPERATING DEVICE FOR MOTOR VEHICLES |
| DE3900416C2 (en) * | 1989-01-09 | 1998-07-30 | Teves Gmbh Alfred | Vacuum brake booster |
| DE3923843A1 (en) * | 1989-07-19 | 1991-01-31 | Teves Gmbh Alfred | VACUUM BRAKE POWER AMPLIFIER |
-
1990
- 1990-08-31 DE DE19904027562 patent/DE4027562C2/en not_active Revoked
-
1991
- 1991-08-06 FR FR9110006A patent/FR2666289B1/en not_active Expired - Fee Related
- 1991-08-16 GB GB9117817A patent/GB2247502A/en not_active Withdrawn
- 1991-08-30 JP JP22060091A patent/JP3626209B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632253U (en) * | 1992-10-02 | 1994-04-26 | 自動車機器株式会社 | Booster sound absorber |
| JPH11507887A (en) * | 1995-03-17 | 1999-07-13 | ボッシュ システム ド フラナージュ | Booster device with flow rate adaptable to direct air inlet |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4027562C2 (en) | 2000-07-27 |
| FR2666289A1 (en) | 1992-03-06 |
| FR2666289B1 (en) | 1993-10-15 |
| GB9117817D0 (en) | 1991-10-09 |
| JP3626209B2 (en) | 2005-03-02 |
| DE4027562A1 (en) | 1992-03-05 |
| GB2247502A (en) | 1992-03-04 |
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