JPS6237267A - Pressure control device for booster - Google Patents
Pressure control device for boosterInfo
- Publication number
- JPS6237267A JPS6237267A JP60177999A JP17799985A JPS6237267A JP S6237267 A JPS6237267 A JP S6237267A JP 60177999 A JP60177999 A JP 60177999A JP 17799985 A JP17799985 A JP 17799985A JP S6237267 A JPS6237267 A JP S6237267A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- opening
- control
- closing
- control device
- 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
Landscapes
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、倍力装置の圧力制御装置に関し、より詳しく
は倍力装置を構成する倍力機構に供給する圧力流体の圧
力を制御する圧力制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure control device for a booster, and more specifically to a pressure control device for controlling the pressure of pressure fluid supplied to a booster mechanism that constitutes a booster. Regarding a control device.
「従来の技術」
従来、ブレーキ倍力装置として、ブレーキペダルに加え
られる踏力の大きさを入力検出手段により検出するとと
もにその信号を制御装置に入力し、この制御装置で圧力
制御装置を制御して上記踏力の大きさに応じた制御圧力
を発生させ、この制御圧力をマスターシリンダに連動さ
せた倍力機構の制御圧室に供給することにより上記マス
ターシリンダにブレーキ液圧を発生させるようにしたも
のがある（例えば特開昭５８−１８８７４８号）。"Prior Art" Conventionally, as a brake booster, the magnitude of the pedal force applied to the brake pedal is detected by an input detection means, the signal is input to a control device, and this control device controls a pressure control device. A brake fluid pressure is generated in the master cylinder by generating a control pressure corresponding to the magnitude of the pedal force and supplying this control pressure to a control pressure chamber of a booster mechanism linked to the master cylinder. (For example, Japanese Patent Application Laid-Open No. 188748/1983).
この種のブレーキ倍力装置によれば、上記制御装置にお
ける圧力制御装置の制御条件を変更するだけで倍力機構
の出力特性を容易に変更することができるので、汎用性
が増すとともに運転者の好みに応じて出力特性を変更す
ることが’ｎｌ能となリ、また車両の重量や減速度を検
出する検出器からの信号を上記制御装置に入力すれば、
車両の運転状態に応じて上記圧力制御装置を−・層細か
く制御することができるので、運転状態に応じた理想的
なブレーキ力を得ることが可能となる。According to this type of brake booster, the output characteristics of the booster can be easily changed by simply changing the control conditions of the pressure control device in the control device, which increases versatility and improves driver comfort. It is possible to change the output characteristics according to your preference, and if you input signals from the detector that detects the weight and deceleration of the vehicle to the above control device,
Since the pressure control device can be finely controlled according to the driving condition of the vehicle, it is possible to obtain an ideal braking force according to the driving condition.
「発明が解決しようとする問題点」
ところで上記圧力制御装置には、必要な大きさの制御圧
力を安定して得られること、その安定した制御圧力を速
やかに得られること等が要求されるが、従来公知の圧力
制御装置ではそのような条件を充分に満すものがなかっ
た。"Problems to be Solved by the Invention" By the way, the above-mentioned pressure control device is required to be able to stably obtain a control pressure of a necessary magnitude, and to be able to obtain the stable control pressure quickly. However, no conventionally known pressure control device satisfactorily satisfies such conditions.
例えばブレーキ倍力装置用の圧力制御装置として、」二
足倍力機構の制御圧室と圧力流体の供給源とを連通ずる
通路に電磁開閉弁を設けるとともに、上記制御圧室とこ
の制御圧室内の圧力流体を排出する排出部とを連通ずる
通路に電磁開閉弁を設け、上記制御圧室の制御圧力が必
要な大きさの制御圧力となるようにその圧力を検出しな
がら上記供給側の電磁開閉弁と排出側の電磁開閉弁とを
開閉制御できるようにしたものを用いることができる。For example, as a pressure control device for a brake booster, an electromagnetic on-off valve is provided in a passage that communicates the control pressure chamber of the two-leg booster with a pressure fluid supply source, and the control pressure chamber and this control pressure chamber are An electromagnetic opening/closing valve is provided in the passage communicating with the discharge part that discharges the pressure fluid, and while detecting the pressure, the electromagnetic valve on the supply side is installed so that the control pressure in the control pressure chamber becomes the required control pressure. An on-off valve and an electromagnetic on-off valve on the discharge side that can be opened and closed can be used.
しかしながら、かかる構成の圧力制御装置では、電磁開
閉弁は一般に作動速度が早いので応答性という点では問
題は生じないが、一対の電磁開閉弁の開閉制御による圧
力制御であるので制御圧力に脈動が生じ、安定した制御
圧力を得ることが困難となる。そして特に小さなブレー
キ力が要求された際には、その脈動による圧力変動は要
求された制御圧力に対して相対的に大きな圧力変動とな
るので、運転者に不快感を与えるようになる。However, in a pressure control device with such a configuration, the electromagnetic on-off valve generally has a fast operating speed, so there is no problem in terms of responsiveness, but since the pressure control is based on the opening/closing control of a pair of electromagnetic on-off valves, the control pressure may pulsate. This makes it difficult to obtain stable control pressure. Particularly when a small braking force is required, the pressure fluctuation due to the pulsation becomes a relatively large pressure fluctuation with respect to the required control pressure, which causes discomfort to the driver.
そのような欠点を改善するため、上記一対の電磁開閉弁
の流路面積を小さくすれば圧力変動を小さくすることが
できるが、その場合には応答性が悪くなることとなる。In order to improve such a drawback, pressure fluctuations can be reduced by reducing the flow path area of the pair of electromagnetic on-off valves, but in that case, responsiveness will deteriorate.
ｒ問題点を解決するための手段」
本発明はそのような事情に鑑み、圧力制御装置を、パイ
ロット室に導入されるパイロット圧力に対応した制御圧
力を発生させてその制御圧力を上記倍力機構の制御圧室
に供給するリレー弁と、上記パイロット室と圧力流体の
供給源とを連通および遮断する第１開閉手段と、上記パ
イロット室と排出部とを連通および遮断する第２開閉手
段とから構成するとともに、上記第１開閉手段と第２開
閉手段との少なくともいずれか一方を直列に接続した少
なくとも２つのＴＬ電磁開閉弁ら構成し、かつ各電磁開
閉弁の開閉作動を相互にオーバーラツプさせて制御する
ようにしたものである。In view of such circumstances, the present invention provides a pressure control device that generates a control pressure corresponding to the pilot pressure introduced into the pilot chamber, and applies the control pressure to the booster mechanism described above. a relay valve that supplies the control pressure chamber to the control pressure chamber, a first opening/closing means for communicating and cutting off the pilot chamber and a pressure fluid supply source, and a second opening/closing means for communicating and cutting off the pilot chamber and the discharge section. and at least one of the first opening/closing means and the second opening/closing means is constituted by at least two TL electromagnetic opening/closing valves connected in series, and the opening/closing operations of each electromagnetic opening/closing valve overlap with each other. It was designed to be controlled.
「作用」
このような構成によれば、例えば第１開閉手段を直列に
接続した２つの電磁開閉弁から構成した場合には、出力
上昇時には、両電磁開閉弁を同時に開放することにより
速やかに制御圧力を上昇させることができ、他方、一定
の出力が要求された際には、その電磁開閉弁の開閉作動
を相互にオーバーラツプさせてオーバーラツプした間だ
け圧力流体を供給することにより、１つの電磁開閉弁を
開閉作動させる場合よりも圧力変動の小さな制御圧力を
得ることができるので、応答性に優れしかも安定した制
御圧力を得ることができるようになる。"Operation" According to such a configuration, for example, when the first opening/closing means is composed of two electromagnetic switching valves connected in series, when the output increases, control is quickly performed by simultaneously opening both electromagnetic switching valves. On the other hand, when a constant output is required, the opening/closing operations of the solenoid valves are overlapped with each other, and pressure fluid is supplied only during the overlapping period. Since it is possible to obtain a control pressure with smaller pressure fluctuations than when opening and closing a valve, it is possible to obtain a control pressure that is excellent in responsiveness and stable.
「実施例」
以下図示実施例について本発明を説明すると、第１図に
おいて、１は図示しない車体に枢支したブレーキペダル
、２はそのブレーキペダル１に加えられる踏力を倍力す
る倍力機構で、この倍力機構２は密封容器としてのシェ
ル３と、このシェル３内に進退動自在に設けたパワーピ
ストン４と、このパワーピストン４とともに上記シェル
３内を前方の大気圧室５と後方の制御圧室６とに区画す
るダイアフラム７とを備えている。``Embodiment'' The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, 1 is a brake pedal pivotally supported on the vehicle body (not shown), and 2 is a boosting mechanism that boosts the pedal force applied to the brake pedal 1. This booster mechanism 2 includes a shell 3 as a sealed container, a power piston 4 provided inside the shell 3 so as to be able to move forward and backward, and a power piston 4 that moves inside the shell 3 between an atmospheric pressure chamber 5 at the front and an atmospheric pressure chamber 5 at the rear. A control pressure chamber 6 and a diaphragm 7 are provided.
上記パワーピストン４の軸部筒状部４ａはシェル３を気
密を保って後方側に貫通突出し、パワーピストン４に先
端を枢支した入力軸８を介して上記ブレーキペダル１に
連動しており、またこのパワーピストン４はリターンス
プリング９により通常は後退した図示非作動位置に保持
されている。The cylindrical shaft portion 4a of the power piston 4 protrudes through the shell 3 to the rear while maintaining airtightness, and is linked to the brake pedal 1 via an input shaft 8 whose tip is pivotally supported on the power piston 4. The power piston 4 is normally held in a retracted, non-operating position as shown in the figure by a return spring 9.
上記パワーピストン４の前方には出力軸１０が一体に連
結固定され、この出力軸１０はシェル３の前部に取付け
た図示しないマスターシリンダに連動している。An output shaft 10 is integrally connected and fixed in front of the power piston 4, and this output shaft 10 is interlocked with a master cylinder (not shown) attached to the front part of the shell 3.
上記倍力機構２の前方の大気圧室５はシェル３に設けた
開口を介して常時大気に連通しており、また後方の制御
圧室６は本発明の圧力制御装置１１を構成するリレー弁
１２を介して圧縮空気の供給源１３又は大気に切換え連
通可能となっている。に記すレー弁１２は、後述するよ
うにパイロット室１４に導入されるパイロット圧力に対
応した制御圧力を発生させ、その制御圧力を上記倍力機
構２の制御圧室６に供給するようになっている。The atmospheric pressure chamber 5 in front of the booster mechanism 2 is always in communication with the atmosphere through an opening provided in the shell 3, and the control pressure chamber 6 in the rear is connected to a relay valve constituting the pressure control device 11 of the present invention. Communication can be switched via 12 to a supply source 13 of compressed air or to the atmosphere. The relay valve 12 described in 1 generates a control pressure corresponding to the pilot pressure introduced into the pilot chamber 14 as described later, and supplies the control pressure to the control pressure chamber 6 of the booster mechanism 2. There is.
さらに上記圧力制御装置１１は、上記パイロット室１４
と供給源１３とを連通および遮断する第１開閉手段１５
と、上記パイロット室１４と排出部としての大気とを連
通および遮断する第２開閉手段１Ｇとを備えている。こ
れら開閉手段１５．１６はコンピュータを備える制御装
置１７によって開閉制御されるようになっており、その
制御装置１７は一上記入力軸８に加えられる入力をロー
ドセル等の入力検出手段１８で検出するとともに、圧力
検出手段１９により上記パイロット室１４内のパイロッ
ト圧力を検出しつつ各開閉手段１５．１６を制御し、入
力値に対応したバイロント圧力をそのパイロット室１４
内に発生させることができるようになっている。Further, the pressure control device 11 includes the pilot chamber 14
first opening/closing means 15 for communicating and cutting off the supply source 13 and the supply source 13;
and a second opening/closing means 1G that communicates with and shuts off the pilot chamber 14 and the atmosphere as an exhaust section. These opening/closing means 15 and 16 are controlled to open and close by a control device 17 equipped with a computer, and the control device 17 detects the input applied to the input shaft 8 using input detection means 18 such as a load cell. , while detecting the pilot pressure in the pilot chamber 14 by the pressure detection means 19, controlling each opening/closing means 15 and 16, and applying the Byronto pressure corresponding to the input value to the pilot chamber 14.
It can be generated internally.
然して一上記リレー弁１２は、上下方向に貫通孔２０を
穿設した３つの部材からなるハウジング２１と、上記貫
通孔２０の中間部下方の径を拡開してその段部に形成し
た第１弁座２２と、上記貫通孔２０内に摺動自在に嵌合
してその下端部に第２弁座２３を形成したプランジャ２
４とを備えている。そして上記貫通孔２０の下方部に筒
状の弁体２５を摺動自在に嵌合し、この弁体２５とハウ
ジング２１との間に弾装したばね２６によって弁体２５
の上端面を各弁座２２．２３に着座するように上方に付
勢している。However, the relay valve 12 includes a housing 21 consisting of three members in which a through hole 20 is vertically bored, and a first housing 21 formed at a stepped portion by enlarging the diameter below the middle of the through hole 20. a valve seat 22; a plunger 2 that is slidably fitted into the through hole 20 and has a second valve seat 23 formed at its lower end;
4. A cylindrical valve body 25 is slidably fitted into the lower part of the through hole 20, and a spring 26 elastically loaded between the valve body 25 and the housing 21 causes the valve body 25 to
The upper end surfaces of the valve seats 22 and 23 are urged upward so that they are seated on the respective valve seats 22 and 23.
したがって、上記弁体２５は第１弁座２２に着座する第
１着座部３０と、第２弁座２３に着座する第２着座部３
１とを有することとなり、その第１着座部３０と第２着
座部３１との中間部分をハウジング２１に形成した横方
向通路３２および導管３３からなる制御通路３４を介し
て上記倍力機構２の制御圧室６に連通させている。Therefore, the valve body 25 includes a first seat portion 30 that seats on the first valve seat 22 and a second seat portion 3 that seats on the second valve seat 23.
1, and the booster mechanism 2 is controlled through a control passage 34 consisting of a lateral passage 32 and a conduit 33 formed in the housing 21 at an intermediate portion between the first seating part 30 and the second seating part 31. It communicates with the control pressure chamber 6.
また、上記第１着座部３０よりも半径方向外方をハウジ
ング２１に形成した横方向通路３５および導管３６から
なる供給通路３７を介して上述した圧力流体の供給源１
３に連通させ、さらに上記第２着座部３１よりも半径方
向内方を上記弁体２５の軸部に形成した通路３８および
ハウジング２１に形成した縦方向通路３９からなる排出
通路４０を介して制御圧室６内の圧力飾体を排出する排
出部すなわち大気に連通させている。Further, the above-mentioned pressure fluid supply source 1 is provided through a supply passage 37 consisting of a lateral passage 35 and a conduit 36 formed in the housing 21 on the radially outward side of the first seating part 30.
3, and is controlled via a discharge passage 40 consisting of a passage 38 formed in the shaft portion of the valve body 25 on the radially inward side of the second seating portion 31 and a longitudinal passage 39 formed in the housing 21. The pressure decoration body in the pressure chamber 6 is communicated with a discharge section, that is, with the atmosphere.
さらに上記弁体２５は、その中間部から下方を小径とす
ることによりその中間部に段部４１を形成してあり、こ
の段部４１を含む空間を、弁体２５とハウジング２１と
の間に張設したダイアフラム状シール部材４２と、ハウ
ジング２１に設けられて弁体２５の外周面下部に摺接す
るリング状シール部材４３とによって、上記供給通路３
７と排出通路４０とから区画した圧力室４４として形成
している。Further, the valve body 25 has a stepped portion 41 at the intermediate portion by making the diameter smaller from the intermediate portion downward, and a space including this stepped portion 41 is created between the valve body 25 and the housing 21. The supply passage 3 is sealed by the stretched diaphragm-shaped seal member 42 and the ring-shaped seal member 43 provided in the housing 21 and slidably in contact with the lower part of the outer peripheral surface of the valve body 25.
It is formed as a pressure chamber 44 divided from 7 and a discharge passage 40.
そしてこの圧力室４４をハウジング２１に形成した横方
向通路４５および縦方向通路４６を介して上記制御通路
３４に連通させ、かつ上記段部４１の受圧面積と、上記
弁体２５の第１着座部３０と第２着座部３１との中間部
分における受圧面積とを等しくすることにより、弁体２
５に加わる制御圧力が平衡するようにしている。The pressure chamber 44 is communicated with the control passage 34 through a horizontal passage 45 and a vertical passage 46 formed in the housing 21, and the pressure receiving area of the stepped portion 41 and the first seating portion of the valve body 25 are connected to each other. 30 and the pressure receiving area at the intermediate portion of the second seating portion 31 are made equal, so that the valve body 2
The control pressure applied to 5 is balanced.
次に、−上記プランジャ２４の上端部には一体にピスト
ン５０を形成して上記貫通孔２０内に気密を保って摺動
自在に嵌合してあり、このピストン５０の上下に前述し
たパイロット室１４と圧力室５１とをそれぞれ区画形成
している。そして下方の圧力室５１はハウジング２１に
形成した通路５２を介して上記制御通路３４内に連通さ
せている。Next, a piston 50 is integrally formed at the upper end of the plunger 24 and is slidably fitted in the through hole 20 in an airtight manner, and above and below the piston 50 is the aforementioned pilot chamber. 14 and a pressure chamber 51 are respectively partitioned. The lower pressure chamber 51 is communicated with the control passage 34 through a passage 52 formed in the housing 21.
上記圧力室５１内に収納したばね５３はピストン５０と
ハウジング２１との間に弾装してあり、このばね５３は
、リレー弁１２の非作動状態では上記ピストン５０を上
昇端位置に保持している。この状態では、ピストン５０
と一体のプランジャ２４も上昇端に位置して第２弁座２
３と弁体２５とが離座し、その弁体２５はばね２６のり
ｉ撥力により第１弁座２２に着座しているので、倍力機
構２の制御圧室６は制御通路３４、第２弁座２３と弁体
２５との間隙および排出通路４０を介して大気に連通し
ている。A spring 53 housed in the pressure chamber 51 is elastically mounted between the piston 50 and the housing 21, and this spring 53 holds the piston 50 at the upper end position when the relay valve 12 is inactive. There is. In this state, the piston 50
The plunger 24 integrated with the second valve seat 2 is also located at the rising end.
3 and the valve body 25 are separated from each other, and the valve body 25 is seated on the first valve seat 22 due to the repulsive force of the spring 26. Therefore, the control pressure chamber 6 of the booster mechanism 2 is connected to the control passage 34 and the first valve seat 22. 2 communicates with the atmosphere through a gap between the valve seat 23 and the valve body 25 and a discharge passage 40.
他方、上記パイロット室１４はハウジング２１に形成し
た通路５４、導管５５および前述した第１開閉手段１５
を介して上記供給源！３に連通させてあり、また上記導
管５５から分岐させて上記第２開閉手段１６を介して大
気に連通させている。そして本実施例では、各開閉手段
１５．１Ｂはそれぞれ２つの直列に接続した電磁開閉弁
１５ａ、１５ｂ、ＩＥｔａ、 １８ｂから構成している
。On the other hand, the pilot chamber 14 includes a passage 54 formed in the housing 21, a conduit 55, and the first opening/closing means 15 described above.
Sources above via! 3, and is branched from the conduit 55 and communicated with the atmosphere via the second opening/closing means 16. In this embodiment, each opening/closing means 15.1B is composed of two electromagnetic opening/closing valves 15a, 15b, IEta, and 18b connected in series.
以上の構成において、非作動状態すなわちブレーキペダ
ルｌに踏力が作用していない状態では、上記制御装置１
７はその状態を入力検出手段１８によって検出し、第１
開閉手段１５の電磁開閉弁１５ａ、１５ｂを閉じ、第２
開閉手段１６の電磁開閉弁１８ａ、１１３ｂを開いてパ
イロット室１４を大気に連通させている。この状態では
、前述したように、倍力機構２の制御圧室６は制御通路
３４、第２弁座２３と弁体２５との間隙および排出通路
４０を介して大気に連通しており、したがってパワーピ
ストン４前後に圧力差が発生していないので、そのパワ
ーピストン４もリターンスプリング９によって非作動位
置に保持されている。In the above configuration, in the non-operating state, that is, when no pedal force is applied to the brake pedal l, the control device 1
7 detects its state by the input detection means 18, and the first
The electromagnetic on-off valves 15a and 15b of the on-off means 15 are closed, and the second
The electromagnetic on-off valves 18a and 113b of the on-off means 16 are opened to communicate the pilot chamber 14 with the atmosphere. In this state, as described above, the control pressure chamber 6 of the booster mechanism 2 is in communication with the atmosphere via the control passage 34, the gap between the second valve seat 23 and the valve body 25, and the discharge passage 40, and therefore Since no pressure difference is generated before and after the power piston 4, the power piston 4 is also held in the non-operating position by the return spring 9.
この状態からブレーキペダル１が踏込まれて入力軸８に
踏力が伝達されると、その踏力が入力検出手段１８によ
って検出され、制御装置１７は第２開閉手段１６の電磁
開閉弁１１３ａ、 １８ｂを閉じるとともに第１開閉手
段１５の電磁開閉弁１５ａ、 １５ｂを開いて上記パイ
ロット室１４内に圧力流体を供給する。When the brake pedal 1 is depressed in this state and the pedal force is transmitted to the input shaft 8, the pedal force is detected by the input detection means 18, and the control device 17 closes the electromagnetic on-off valves 113a, 18b of the second opening/closing means 16. At the same time, the electromagnetic on-off valves 15a and 15b of the first on-off means 15 are opened to supply pressurized fluid into the pilot chamber 14.
上記パイロット室１４内に圧力流体が導入されると、ピ
ストン５０およびこれと一体のプランジャ２４が下方に
変位されるので、第２弁座２３と弁体２５とが着座して
制御圧室６と大気との連通を遮断し、ひき続き弁体２５
がばね２６に抗して下方に移動されるので弁体２５は第
１弁座２２から離座される。これにより供給源１３から
圧力流体が供給通路３７、弁体２５と第１弁座２２との
間隙および制御通路３４を介して倍力機構２の制御圧室
６内に供給されるのでパワーピストン４の前後に流体圧
力差が生じ、パワーピストン４はリターンスプリング９
の弾撥力に抗して前進されるようになる。When pressure fluid is introduced into the pilot chamber 14, the piston 50 and the plunger 24 integrated therewith are displaced downward, so that the second valve seat 23 and the valve body 25 are seated, and the control pressure chamber 6 After cutting off the communication with the atmosphere, the valve body 25
is moved downward against the spring 26, so the valve body 25 is removed from the first valve seat 22. As a result, pressure fluid is supplied from the supply source 13 into the control pressure chamber 6 of the booster mechanism 2 through the supply passage 37, the gap between the valve body 25 and the first valve seat 22, and the control passage 34, so that the power piston 4 A fluid pressure difference occurs before and after the power piston 4 is moved to the return spring 9.
The object is moved forward against the repulsive force of the object.
上記パイロット室１４内に導入される圧力は圧力検出手
段１９によって検出されており、その圧力が上記入力に
対応した圧力に達すると、上記制御装置１７は以下に詳
細に述べるように、第１開閉手段１５を閉じる。一方上
記制御庄室６の圧力は通路５２を通って圧力室５１に導
かれピストン５０を上方に附勢する。これによりプラン
ジャ２４が上方に移動するので、弁体２５が第１弁座２
２に着座するとともに第２弁座２３と弁体２５も着座す
るが、このとき上記第１開閉手段１５の締切りに僅かで
あるが時間がかかるため上記パイロット室１４の圧力は
目標の圧力より僅かに高くなる。すると、上記第２開閉
手段１６を聞いて上記パイロット室１４の圧力を低下さ
せる。さらに、パイロット室１４内の圧力が低下しすぎ
ると、上記制御装置ｌ？は再び第１開閉手段】５を開く
とともに第２開閉手段１６を閉じてパイロット室１４に
圧力流体を供給するようになる。The pressure introduced into the pilot chamber 14 is detected by a pressure detection means 19, and when the pressure reaches a pressure corresponding to the input, the control device 17 controls the first opening/closing operation as described in detail below. Close means 15. On the other hand, the pressure in the control chamber 6 is guided to the pressure chamber 51 through the passage 52 and urges the piston 50 upward. As a result, the plunger 24 moves upward, so that the valve body 25 moves to the first valve seat 2.
2, the second valve seat 23 and the valve body 25 are also seated, but at this time, it takes a little time to close the first opening/closing means 15, so the pressure in the pilot chamber 14 is slightly lower than the target pressure. becomes higher. Then, the second opening/closing means 16 is activated to lower the pressure in the pilot chamber 14. Furthermore, if the pressure in the pilot chamber 14 drops too much, the control device l? The first opening/closing means 5 is opened again, and the second opening/closing means 16 is closed to supply pressure fluid to the pilot chamber 14.
ところマ木実施例では、各一対の電磁開閉弁１５ａ、１
５ｂおよびＩＥｉａ、ｌｅｂはそれぞれオーバーラツプ
して開閉制御されるようになっており、これによって上
記パイロット室１４の圧力変動を、したがって制御圧室
６の圧力変動を小さくするようにしている。すなわち、
第２図に示すように、上記各開閉手段１５．１６をそれ
ぞれ１つの電磁開閉弁で構成し、かつそれら電磁開閉弁
を交互に開閉制御した際にはパイロット室１４の圧力変
動幅Ｐが大きくなる。However, in the embodiment, each pair of electromagnetic on-off valves 15a, 1
5b, IEia, and leb are controlled to open and close in an overlapping manner, thereby reducing pressure fluctuations in the pilot chamber 14 and, therefore, pressure fluctuations in the control pressure chamber 6. That is,
As shown in FIG. 2, when each of the opening/closing means 15 and 16 is constituted by one electromagnetic opening/closing valve, and the opening/closing of the electromagnetic opening/closing valves is controlled alternately, the pressure fluctuation range P in the pilot chamber 14 becomes large. Become.
これに対し、第３図に示すように、開閉手段１５．１Ｂ
を構成する２つの電磁開閉弁１５ａ、 １５ｂおよび１
８ａ、１８ｂをそれぞれオーバーラツプして開閉制御す
ると、両電磁開閉弁が同時に開いた時間Ｔの間だけ圧力
流体が流通できるようになる。On the other hand, as shown in FIG. 3, the opening/closing means 15.1B
Two electromagnetic on-off valves 15a, 15b and 1 constitute the
By controlling the opening and closing of valves 8a and 18b in an overlapping manner, pressure fluid can flow only during the time period T when both electromagnetic valves are opened at the same time.
この状態では第２図の場合に比較して、パイロット室１
４内の圧力変動幅ｐは小さくなる。In this state, compared to the case shown in Fig. 2, the pilot room 1
4, the pressure fluctuation width p becomes smaller.
したがって、制御圧室６内には上記入力軸８に加えられ
た入力に対応し、かつ各一対の相互にオーバーラツプし
て開閉制御される電磁開閉弁１５ａ、１５ｂおよびｌｅ
ａ、ＩＢｂの作動に伴なッテ小さく脈動する制御圧力が
導入されるようになる。Therefore, in the control pressure chamber 6, there are electromagnetic on-off valves 15a, 15b and le that correspond to the input applied to the input shaft 8 and that are controlled to open and close in a mutually overlapping manner.
With the operation of a and IBb, a small pulsating control pressure is introduced.
そしてこれにより、上記パワーピストン４およびこれと
一体の出力軸１０は入力に応じた出力で前進され、出力
軸１０に連動する図示しないマスターシリンダ内にブレ
ーキ液圧が発生してブレーキ作用が行なわれるようにな
る。As a result, the power piston 4 and the output shaft 10 integrated therewith are moved forward with an output corresponding to the input, and brake fluid pressure is generated in a master cylinder (not shown) linked to the output shaft 10 to perform a braking action. It becomes like this.
このように、圧力１：、経時には両電磁開閉弁１５ａ、
１５ｂを開放して速やかに倍力機構２に出力を発生させ
ることができ、しかも制御圧力が入力値に対応した所要
の圧力となった際には、各電磁開閉弁＋５ａ、１５ｂお
よびｔ（ｌａ、１６ｂの相互にオーバーラツプした開閉
制御によって圧力変動を小さくすることができるので、
応答性が良くしかも操作者に不快感を与えることが防止
できる。In this way, when pressure 1:, both electromagnetic on-off valves 15a,
15b can be opened to immediately cause the booster mechanism 2 to generate an output, and when the control pressure reaches the required pressure corresponding to the input value, each electromagnetic on-off valve +5a, 15b and t(la , 16b, pressure fluctuations can be reduced by mutually overlapping opening/closing control.
Responsiveness is good and discomfort to the operator can be prevented.
なお、」二足実施例では各開閉手段Ｉ５．１６をそれぞ
れ一対の電磁開閉弁１５ａ、１５ｂおよびｌｅａ、１６
ｂから構成しているが、これに限定されるものではなく
、例えば一方の開閉手段を流路面積の異なる並列に接続
した一対の電磁開閉弁から構成し、要求される圧力上昇
の程度に応じてその並列の電磁開閉弁の一方又は双方を
選択使用するようにしてもよい。In addition, in the two-legged embodiment, each opening/closing means I5.16 is a pair of electromagnetic opening/closing valves 15a, 15b and lea, 16.
(b), but is not limited to this; for example, one of the opening/closing means may be a pair of electromagnetic opening/closing valves connected in parallel with different flow path areas, and the Alternatively, one or both of the parallel electromagnetic on-off valves may be selectively used.
さらに、上記制御装置１７に車両の積載状態や減速度等
の各種の条件を入力して総合的に制御圧力を決定するよ
うにしてもよいことは勿論である。Furthermore, it goes without saying that the control pressure may be comprehensively determined by inputting various conditions such as the loading state of the vehicle and deceleration into the control device 17.
「発明の効果」
以上のように、本発明によれば、応答性に優れしかも安
定した倍力機構の出力を得ることが可能となるという効
果が得られる。"Effects of the Invention" As described above, according to the present invention, it is possible to obtain an output of a boosting mechanism that is excellent in responsiveness and stable.
第１図は本発明の一実施例を示し、要部を断面図とした
系統図、第２図は各開閉手段をそれぞれ１つの電磁開閉
弁から構成し、かつ両者を交互に開閉制御した場合の圧
力変動幅Ｐを説明する図、第３図は本発明における圧力
変動幅ｐを説明する図である。
１・・・ブレーキペダル ２・・・倍力機構３・・・シ
ェル ４・・・パワーピストン６・・・制御圧
室 ８・・・入力軸１１・・・圧力制御装置
１２・・・リレー弁１３・・・供給源 １４・
・・パイロット室１５・・・第１開閉手段 １６・・
・第２開閉手段１５ａ、１５ｂ、１ｆ３ａ、 １６ｂ−
・−電磁開閉弁１７・・・制御装置 １８・・・
入力検出手段特許出願人 自動車機器株式会社
第 ２ 図Fig. 1 shows an embodiment of the present invention, and is a system diagram with a sectional view of the main parts, and Fig. 2 shows an example in which each opening/closing means is composed of one electromagnetic opening/closing valve, and both are controlled to open and close alternately. FIG. 3 is a diagram illustrating the pressure fluctuation width P in the present invention. 1...Brake pedal 2...Boosting mechanism 3...Shell 4...Power piston 6...Control pressure chamber 8...Input shaft 11...Pressure control device
12... Relay valve 13... Supply source 14.
...Pilot room 15...First opening/closing means 16...
-Second opening/closing means 15a, 15b, 1f3a, 16b-
・-Solenoid on-off valve 17...Control device 18...
Input detection means patent applicant Jidosha Kiki Co., Ltd. Figure 2
Claims (1)
御圧力を倍力機構の制御圧室に供給して出力を発生させ
る倍力装置の圧力制御装置であって、上記圧力制御装置
は、パイロット室に導入されるパイロット圧力に対応し
た制御圧力を発生させてその制御圧力を上記倍力機構の
制御圧室に供給するリレー弁と、上記パイロット室と圧
力流体の供給源とを連通および遮断する第１開閉手段と
、上記パイロット室と排出部とを連通および遮断する第
２開閉手段とを備え、かつ上記第１開閉手段と第２開閉
手段との少なくともいずれか一方を直列に接続した少な
くとも２つの電磁開閉弁から構成し、かつ各電磁開閉弁
の開閉作動を相互にオーバーラップさせて制御すること
を特徴とする倍力装置の圧力制御装置。A pressure control device for a booster that detects an input applied to an input shaft and supplies a control pressure based on the input value to a control pressure chamber of a booster mechanism to generate an output, the pressure control device comprising: A relay valve that generates a control pressure corresponding to the pilot pressure introduced into the pilot chamber and supplies the control pressure to the control pressure chamber of the booster mechanism, and communicates and shuts off the pilot chamber and the pressure fluid supply source. at least one of the first opening and closing means and the second opening and closing means are connected in series. A pressure control device for a booster, comprising two electromagnetic on-off valves, and controlling the opening and closing operations of each electromagnetic on-off valve in an overlapping manner.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177999A JPH0647373B2 (en) | 1985-08-13 | 1985-08-13 | Booster pressure controller |
| US06/894,368 US4835970A (en) | 1985-08-13 | 1986-08-07 | Pneumatic power brake system |
| FR868611640A FR2586221B1 (en) | 1985-08-13 | 1986-08-12 | PNEUMATIC SERVO-BRAKE SYSTEM |
| DE19863627278 DE3627278A1 (en) | 1985-08-13 | 1986-08-12 | PNEUMATIC SERVO BRAKE SYSTEM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177999A JPH0647373B2 (en) | 1985-08-13 | 1985-08-13 | Booster pressure controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6237267A true JPS6237267A (en) | 1987-02-18 |
| JPH0647373B2 JPH0647373B2 (en) | 1994-06-22 |
Family
ID=16040773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60177999A Expired - Lifetime JPH0647373B2 (en) | 1985-08-13 | 1985-08-13 | Booster pressure controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647373B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07186914A (en) * | 1993-12-24 | 1995-07-25 | Komatsu Ltd | Automatic brake valve |
| CN102481919A (en) * | 2009-09-09 | 2012-05-30 | 威伯科有限公司 | Relay valve device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601403A (en) * | 1983-06-09 | 1985-01-07 | アプライド・パワ−・インコ−ポレ−テツド | Pressure control apparatus and method |
-
1985
- 1985-08-13 JP JP60177999A patent/JPH0647373B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601403A (en) * | 1983-06-09 | 1985-01-07 | アプライド・パワ−・インコ−ポレ−テツド | Pressure control apparatus and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07186914A (en) * | 1993-12-24 | 1995-07-25 | Komatsu Ltd | Automatic brake valve |
| CN102481919A (en) * | 2009-09-09 | 2012-05-30 | 威伯科有限公司 | Relay valve device |
| KR20120082402A (en) * | 2009-09-09 | 2012-07-23 | 바브코 게엠베하 | Relay valve device |
| JP2013504027A (en) * | 2009-09-09 | 2013-02-04 | ヴアブコ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Relay valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0647373B2 (en) | 1994-06-22 |
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