JP3626209B2 - Negative pressure brake booster - Google Patents

Negative pressure brake booster Download PDF

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Publication number
JP3626209B2
JP3626209B2 JP22060091A JP22060091A JP3626209B2 JP 3626209 B2 JP3626209 B2 JP 3626209B2 JP 22060091 A JP22060091 A JP 22060091A JP 22060091 A JP22060091 A JP 22060091A JP 3626209 B2 JP3626209 B2 JP 3626209B2
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Japan
Prior art keywords
negative pressure
boot
housing
brake booster
booster
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Expired - Fee Related
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JP22060091A
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Japanese (ja)
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JPH04254245A (en
Inventor
ラルフ・ヤーコビ
ユルゲン・バウアー
ロルフ・フェリンガー
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Alfred Teves GmbH
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Alfred Teves GmbH
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    • 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

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Description

【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まれた制御弁とを備え、この制御弁ハウジングの一部は、ブースタハウジングから突出しかつブーツで保護され、このブーツは、ブースタハウジングと、制御弁を作動するピストンロッドとに、シールした状態で固定される負圧ブレーキブースタに関する。
【０００２】
【従来の技術】
この形式の負圧ブレーキブースタは、本願出願人による先のドイツ特許出願第Ｐ３９２３８４３．１号に記載されている。この従来の負圧ブレーキブースタは、作動されたときに、ブレーキブースタを支える自動車のスプラッシボードの近部からエアが取入れられ、ブーツをブースタハウジングに取付けるスペーサおよびブーツの内部に配置されてたエアフィルタを通して、ブレーキブースタの長手方向軸と平行に、ブーツの内部に流れ、制御ハウジングの端部に形成された大径開口部に送られ、制御弁にエアを供給する。これにより、内部を流通するエアに起因する騒音のレベルは、自動車の室内で大幅に低減され、自動車の乗客にはほとんど達しない。
【０００３】
【発明が解決しようとする課題】
しかし、この従来の負圧ブレーキブースタでは、第１にスペーサの組立てが複雑であり、かなりの製造コストを要するために不都合な点と考えられている。他の不都合な点は、ブースタの装着寸法（スプラッシボード壁の開口を貫通して突出するブースタのネック部の径）による必要スペースが、スペーサを用いるために、半径方向に大きくなることである。更に他の不都合な点は、流入エアが、スペーサの構造により、複数回にわたって方向を変更し、これにより、応答時間が長くなることである。
したがって、本発明の目的は、上述の形式のブレーキブースタの組立てを簡略化し、同時に装着スペースを最小とすることにある。特に、作動に必要な空気が導入される領域を、応答時間が短くなるように形成することである。
【０００４】
【課題を解決するための手段、作用及び効果】
上記目的を達成する本発明の負圧ブレーキブースタは、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を有し、制御ハウジング内に組み込まれた制御弁の一部は、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、前記ブーツは、ブースタハウジングと、制御弁を作動させる作動ロッドとにシールした状態で固着され、このブーツは、半径方向に貫通する複数のエア取入れ口を有し、このエア取入れ口を、環状のフィルタ部材が覆う負圧ブレーキブースタであって、前記フィルタ部材は、前記ブーツの少なくとも１つのビードによって保持され、前記ブーツの半径方向外方に配置されていることを特徴とする。
【０００５】
この負圧ブレーキブースタによると、負圧ブレーキブースタの作動に必要な空気は、ブーツに設けられた複数の半径方向のエア取入れ口から、これらのエア取入れ口を覆うフィルタ部材により、作動信頼性を損なう虞のある汚染物質を除去された後、負圧ブレーキブースタの内部に流入する。このフィルタ部材は、ブーツの少なくとも１つのビードでこのブーツの半径方向外方に保持されることにより、特別な部材を必要とすることなく簡単に取付けられる。
【０００６】
このように、フィルタ部材で覆われた半径方向のエア取入れ口が、ブースタハウジングに対するブーツの取付け領域に形成されることにより、コンパクトな構造で取付けが容易となり、更に、この半径方向のエア取入れ口からフィルタを介して流入する空気が、スペーサを介して流入するものではないために、空気が複雑に方向を変更することなく、滑らかに流入し、応答時間が短くなる。
【０００７】
エア取入れ口を覆うフィルタ部材は、ブーツの半径方向内方あるいは外方のいずれの側にも配置することができる。このフィルタ部材は、ブーツに形成されたビードにより、好適な態様で保持することができる。
【０００８】
フィルタ部材を吸音材で形成した場合には、この流入空気による騒音を低下することができる。
【０００９】
ノイズダンパが、制御ハウジングのハウジングから突出する端部に設けられる場合には、騒音が更に低下される。このノイズダンパが発泡材等で形成されたリングで形成され、このリングが負圧ブースタの長手方向軸と平行に延びるエアダクトを備えることが好ましい。
【００１０】
【実施例】
以下、本発明について、図示の実施例を参照して詳細に説明する。
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可動壁２によって、作動室３と負圧室４とに区画形成される。この可動壁２は金属板を深絞り成形したダイヤフラム板８と、このダイヤフラム板に当接した可撓性ダイヤフラム１８とから形成されており、この可撓性ダイヤフラムは詳細には図示してないが転動型ダイヤフラムで形成され、ダイヤフラム板８の外周部とブースタ１との間をシールする。
【００１１】
ピストンロッドとしての作動ロッド７で操作される制御弁１２は、ブースタハウジング１内をシールされた状態で案内され、可動壁２を支える。この制御弁１２は、制御ハウジング５に形成された第１の弁座１５と、弁ピストン９に形成された第２弁座１６とを備え、この弁ピストン９は作動ロッド７に結合され、更に、ポペット弁部材１０を備える。このポペット弁部材１０は、第１，第２の弁座１５，１６と協働し、ポペット弁装着構造部２１で支えられた圧縮ばね２２により、弁座１５，１６に押圧されている。図示の非作動位置では、作動チャンバ３は、制御ハウジング５内を側方に延びるチャンネル２８を介して負圧チャンバ４に接続されている。
【００１２】
制御ハウジング５の前部に当接するゴム弾性の反動ディスク６と、ヘッドフランジ部２３を有するプッシュロッド１４とを介して、制動力がブレーキシステムの図示しないマスタシリンダに伝達される。このマスタシリンダはブレーキブースタの負圧室側に取付けられる。作動ロッド７に作用する入力は、弁ピストン９と反動ディスク６との間に介挿された比率変換ディスク２０により、反動ディスク６に伝達される。
【００１３】
詳細には図示しないリセットばね２６が、ブースタハウジング１の負圧側端壁上のフランジで支えられており、可動壁２を図示の初期位置に保持する。更に、第２の圧縮ばね２７が弁ピストン９と制御ハウジング５に形成された支持面（概略的に示す）との間に配置されている。この第２の圧縮ばね２７は、弁ピストン９およびその弁座１６をポペット弁１０に向けて付勢する。
【００１４】
制御弁１２が作動されたときに、作動チャンバ３を最終的に大気に接続するため、制御ハウジング５内に通路２９が形成されており、この通路はほぼ半径方向に延びる。
【００１５】
図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の一部は、弾性ブーツ１９により、汚染物質および湿気から保護されており、この弾性ブーツは、一端側を作動ロッド７に形成された環状溝内に嵌合され、他端側をブースタハウジング１に取付けられている。このブースタハウジング１に取付けられる弾性ブーツの取付け領域には、半径方向のエア取入れ口１３が多数形成されており、これらのエア取入れ口はその周部に均等に分散配置され、空気を内部に流入させることができる。これらのエア取入れ口１３と対向した半径方向内方位置に環状フィルタ部材１１が設けられており、このこの環状フィルタ部材１１は、ブーツ１９に成形されたビード１７により、ブースタハウジング１上に軸方向に当接した状態に保持されるのが好ましい。この環状フィルタ部材１１は好適な吸音材で形成することができる。これに代え、環状フィルタ部材１１を弾性ブーツ上で半径方向外方に配置し、２つの軸方向に対向する保持ビードで保持することもできる。
【００１６】
更に、騒音を低減するために、ブースタハウジング１から突出する制御ハウジング５の端部にノイズダンパ２４が設けられている。このノイズダンパ２４は、発泡材等でリング状に形成され、負圧ブレーキブースタの長手方向軸線とほぼ平行に延びる多数のエアダクト２５が延設され、空気をブースタハウジング１の内部に何ら阻害することなく流入させることができる。
【図面の簡単な説明】
【図１】本発明の一実施例による負圧ブレーキブースタの拡大断面図。
【符号の説明】
１…ブースタハウジング、２…可動壁、３…作動室、４…負圧室、５…制御ハウジング、７…作動ロッド、１１…フィルタ部材、１２…制御弁、１３…エア取入れ口、１５，１６…弁座、１７…ビード、１９…弾性ブーツ、２４ノイズダンパ、２５…エアダクト。[0001]
[Industrial application fields]
The present invention comprises a negative pressure chamber having a constant pressure in a booster housing, a working chamber having a variable pressure, and a control valve incorporated in the control valve housing, and a part of the control valve housing protrudes from the booster housing. The boot is related to a negative pressure brake booster that is fixed in a sealed state to a booster housing and a piston rod that operates a control valve.
[0002]
[Prior art]
This type of negative pressure brake booster is described in the earlier German Patent Application No. P3923843.1 by the present applicant. When this conventional negative pressure brake booster is actuated, air is taken in from the vicinity of the automobile splash board that supports the brake booster, and the spacer that attaches the boot to the booster housing and the air that is located inside the boot. Through the filter, it flows into the boot parallel to the longitudinal axis of the brake booster and is sent to a large diameter opening formed at the end of the control housing to supply air to the control valve. As a result, the level of noise caused by the air circulating in the interior is greatly reduced in the interior of the automobile and hardly reaches the passengers of the automobile.
[0003]
[Problems to be solved by the invention]
However, this conventional negative pressure brake booster is considered to be inconvenient because the assembly of the spacer is complicated and requires a considerable manufacturing cost. Another disadvantage is that the required space due to the mounting size of the booster (diameter of the neck portion of the booster protruding through the opening of the splash board wall) is increased in the radial direction because the spacer is used. . Yet another inconvenience is that the incoming air changes direction several times due to the structure of the spacer, thereby increasing the response time.
Accordingly, it is an object of the present invention to simplify the assembly of a brake booster of the type described above and at the same time minimize the mounting space. In particular, the region where the air necessary for operation is introduced is formed so as to shorten the response time.
[0004]
[Means, actions and effects for solving the problems]
The negative pressure brake booster of the present invention that achieves the above object has a negative pressure chamber having a constant pressure and a working chamber having a variable pressure in the booster housing, and a part of the control valve incorporated in the control housing is a booster. Projecting from the housing and protected by a boot, the boot is sealed and secured to a booster housing and an actuating rod for actuating the control valve, the boot having a plurality of air inlets penetrating radially. The air intake port is a negative pressure brake booster that is covered with an annular filter member, and the filter member is held by at least one bead of the boot and is arranged radially outward of the boot. It is characterized by that.
[0005]
According to this negative pressure brake booster, the air required for the operation of the negative pressure brake booster is made reliable from the plurality of radial air intakes provided in the boot by the filter member covering these air intakes. After removing contaminants that may be damaged, it flows into the negative pressure brake booster. The filter member is easily mounted without requiring a special member by being held radially outward of the boot by at least one bead of the boot.
[0006]
As described above, the radial air intake port covered with the filter member is formed in the boot mounting region with respect to the booster housing, thereby facilitating the mounting with a compact structure, and further, the radial air intake port. Since the air flowing in through the filter does not flow in through the spacer, the air flows smoothly without changing the direction in a complicated manner, and the response time is shortened.
[0007]
The filter member covering the air intake port can be arranged on either the radially inner side or the outer side of the boot. This filter member can be held in a suitable manner by a bead formed on the boot.
[0008]
When the filter member is formed of a sound absorbing material, noise due to the inflowing air can be reduced.
[0009]
When the noise damper is provided at the end protruding from the housing of the control housing, the noise is further reduced. Preferably, the noise damper is formed of a ring formed of a foam material or the like, and the ring includes an air duct that extends parallel to the longitudinal axis of the negative pressure booster.
[0010]
【Example】
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
FIG. 1 is an enlarged cross-sectional view for clearly showing the configuration of a brake booster. A booster housing 1 of the brake booster is divided into a working chamber 3 and a negative pressure chamber 4 by a movable wall 2 movable in the axial direction. It is formed. The movable wall 2 is formed of a diaphragm plate 8 formed by deep drawing a metal plate and a flexible diaphragm 18 in contact with the diaphragm plate. The flexible diaphragm is not shown in detail. It is formed of a rolling diaphragm and seals between the outer peripheral portion of the diaphragm plate 8 and the booster 1.
[0011]
A control valve 12 operated by an operating rod 7 as a piston rod is guided in a state where the inside of the booster housing 1 is sealed, and supports the movable wall 2. The control valve 12 includes a first valve seat 15 formed on the control housing 5 and a second valve seat 16 formed on the valve piston 9, which is coupled to the actuating rod 7, and The poppet valve member 10 is provided. The poppet valve member 10 is pressed against the valve seats 15 and 16 by a compression spring 22 supported by the poppet valve mounting structure portion 21 in cooperation with the first and second valve seats 15 and 16. In the non-actuated position shown, the working chamber 3 is connected to the negative pressure chamber 4 via a channel 28 extending laterally within the control housing 5.
[0012]
A braking force is transmitted to a master cylinder (not shown) of the brake system via a rubber elastic reaction disk 6 that abuts the front portion of the control housing 5 and a push rod 14 having a head flange portion 23. This master cylinder is attached to the negative pressure chamber side of the brake booster. Input acting on the actuating rod 7 is transmitted to the reaction disk 6 by a ratio conversion disk 20 inserted between the valve piston 9 and the reaction disk 6.
[0013]
A reset spring 26 (not shown in detail) is supported by a flange on the negative pressure side end wall of the booster housing 1, and holds the movable wall 2 in the illustrated initial position. Furthermore, a second compression spring 27 is arranged between the valve piston 9 and a support surface (schematically shown) formed on the control housing 5. The second compression spring 27 urges the valve piston 9 and its valve seat 16 toward the poppet valve 10.
[0014]
When the control valve 12 is actuated, a passage 29 is formed in the control housing 5 to finally connect the working chamber 3 to the atmosphere, this passage extending substantially radially.
[0015]
As is apparent from the figure, a part of the control housing 5 protruding from the booster housing 1 is protected from contaminants and moisture by an elastic boot 19, and this elastic boot is formed on the operating rod 7 at one end side. The other end is attached to the booster housing 1. A large number of radial air inlets 13 are formed in the mounting area of the elastic boots attached to the booster housing 1, and these air inlets are evenly distributed around the periphery of the air inlet 13 so that air flows into the interior. Can be made. An annular filter member 11 is provided at a radially inward position facing these air intakes 13, and this annular filter member 11 is axially placed on the booster housing 1 by a bead 17 formed on the boot 19. It is preferable to be held in a state where it abuts against. The annular filter member 11 can be formed of a suitable sound absorbing material. Alternatively, the annular filter member 11 can be disposed radially outward on the elastic boot and held by two holding beads facing in the axial direction.
[0016]
Furthermore, a noise damper 24 is provided at the end of the control housing 5 protruding from the booster housing 1 in order to reduce noise. The noise damper 24 is formed in a ring shape by foaming material or the like, and a plurality of air ducts 25 extending substantially parallel to the longitudinal axis of the negative pressure brake booster are extended so as not to obstruct air inside the booster housing 1. Can flow in.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view of a negative pressure brake booster according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Booster housing, 2 ... Movable wall, 3 ... Actuation chamber, 4 ... Negative pressure chamber, 5 ... Control housing, 7 ... Actuation rod, 11 ... Filter member, 12 ... Control valve, 13 ... Air intake port, 15, 16 ... valve seat, 17 ... bead, 19 ... elastic boot, 24 noise damper, 25 ... air duct.

Claims (4)

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を有し、制御ハウジング内に組み込まれた制御弁の一部は、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、前記ブーツは、ブースタハウジングと、制御弁を作動させる作動ロッドとにシールした状態で固着され、このブーツは、半径方向に貫通する複数のエア取入れ口（１３）を有し、このエア取入れ口を環状のフィルタ部材（１１）が覆う負圧ブレーキブースタであって、前記フィルタ部材（１１）は、前記ブーツ（１９）の少なくとも１つのビード（１７）によって保持され、前記ブーツ（１９）の半径方向外方に配置されていることを特徴とする、負圧ブレーキブースタ。The booster housing has a constant pressure negative pressure chamber and a pressure variable working chamber, a part of the control valve incorporated in the control housing protrudes from the booster housing and is protected by a boot, and the boot is The boot is fixed in a sealed state to a booster housing and an operating rod for operating the control valve, and the boot has a plurality of air intakes (13) penetrating in a radial direction. The air intakes are annular filter members. (11) is a negative pressure brake booster, wherein the filter member (11) is held by at least one bead (17) of the boot (19) and is arranged radially outward of the boot (19). Negative pressure brake booster, characterized in that フィルタ部材（１１）は、吸音材で形成されることを特徴とする請求項１に記載の負圧ブレーキブースタ。The negative pressure brake booster according to claim 1, wherein the filter member (11) is made of a sound absorbing material. ノイズダンパ（２４）が、制御ハウジング（５）のハウジング（１）から突出する端部に設けられていることを特徴とする請求項１もしくは２に記載の負圧ブレーキブースタ。The negative pressure brake booster according to claim 1 or 2, wherein the noise damper (24) is provided at an end of the control housing (5) protruding from the housing (1). ノイズダンパ（２４）は、発泡材等で形成されたリング状形状を有し、負圧ブレーキブースタの長手方向軸と平行に延びるエアダクト（２５）を備える請求項３に記載の負圧ブレーキブースタ。The negative pressure brake booster according to claim 3, wherein the noise damper (24) has an air duct (25) having a ring shape formed of a foam material or the like and extending parallel to a longitudinal axis of the negative pressure brake booster.
JP22060091A 1990-08-31 1991-08-30 Negative pressure brake booster Expired - Fee Related JP3626209B2 (en)

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 JPH04254245A (en) 1992-09-09
JP3626209B2 true JP3626209B2 (en) 2005-03-02

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JP22060091A Expired - Fee Related JP3626209B2 (en) 1990-08-31 1991-08-30 Negative pressure brake booster

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JP (1) JP3626209B2 (en)
DE (1) DE4027562C2 (en)
FR (1) FR2666289B1 (en)
GB (1) GB2247502A (en)

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FR2689076B1 (en) * 1992-03-31 1994-05-20 Bendix Europe Services Technique PNEUMATIC SERVOMOTOR.
JPH0632253U (en) * 1992-10-02 1994-04-26 自動車機器株式会社 Booster sound absorber
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
FR2731668B1 (en) * 1995-03-17 1997-05-16 Alliedsignal Europ Services SERVOMOTOR WITH ADAPTIVE FLOW DIRECT AIR INTAKE
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

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Also Published As

Publication number Publication date
DE4027562C2 (en) 2000-07-27
JPH04254245A (en) 1992-09-09
FR2666289A1 (en) 1992-03-06
FR2666289B1 (en) 1993-10-15
GB9117817D0 (en) 1991-10-09
DE4027562A1 (en) 1992-03-05
GB2247502A (en) 1992-03-04

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