JPH0549509B2 - - Google Patents
Info
- Publication number
- JPH0549509B2 JPH0549509B2 JP7542684A JP7542684A JPH0549509B2 JP H0549509 B2 JPH0549509 B2 JP H0549509B2 JP 7542684 A JP7542684 A JP 7542684A JP 7542684 A JP7542684 A JP 7542684A JP H0549509 B2 JPH0549509 B2 JP H0549509B2
- Authority
- JP
- Japan
- Prior art keywords
- oil chamber
- brake
- oil
- master cylinder
- hydraulic pressure
- 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.)
- Expired - Lifetime
Links
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000004044 response Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000994 depressogenic effect Effects 0.000 description 12
- 238000005192 partition Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004043 responsiveness Effects 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
- B60T13/66—Electrical control in fluid-pressure brake systems
-
- 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
- B60T13/12—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 liquid
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
- B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、ブレーキ装置に作用させる制動油圧
を電磁力により倍力するようにした自動車の電磁
サーボブレーキ装置に関し、特に、急制動時にお
ける作動遅れ対策に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an electromagnetic servo brake system for automobiles that uses electromagnetic force to double the braking hydraulic pressure applied to the brake system, and in particular, to Regarding countermeasures against delays.
(従来技術)
従来、電磁力により制動油圧を発生させるブレ
ーキ装置として、例えば特開昭49−16128号公報
に開示されるように、車両衝突時の衝撃力を検出
し、車両衝突時には運転者のブレーキ操作の有無
に拘らず電磁力により制動油圧を自動的に発生さ
せて、車両を速かに停止させるようにしたものが
知られている。(Prior art) Conventionally, a brake device that generates braking oil pressure using electromagnetic force detects the impact force at the time of a vehicle collision, and detects the impact force at the time of a vehicle collision, as disclosed in Japanese Patent Application Laid-Open No. 49-16128. A vehicle is known that automatically generates braking oil pressure by electromagnetic force regardless of whether or not the brake is operated, thereby quickly stopping the vehicle.
そして、上記考えを利用して、運転者によるブ
レーキペダルの踏込操作時、この踏込操作に基づ
く制動油圧を電磁力によつて倍力するようにすべ
く、例えば、ブレーキ装置に制動油圧を作用させ
る制動油圧を有するマスタシリンダと、ブレーキ
ペダルに加えられる踏力を油圧に変換する油圧変
換手段と、該油圧変換手段に設けた踏力検出セン
サの出力信号を受けて所定倍力の制動油圧を上記
マスタシリンダの制動油室に作用させる電磁手段
とからなる電磁サーボブレーキ装置を設け、運転
者によるブレーキペダルの踏込時、油圧変換手段
で変換したブレーキペダル踏力に基づいて所定倍
力の制動油圧を電磁手段で発生させ、この制動油
圧をマスタシリンダの制動油室に作用させること
が考えられる。 Then, using the above idea, when the driver depresses the brake pedal, the braking hydraulic pressure based on this depressing operation is doubled by electromagnetic force. For example, the braking hydraulic pressure is applied to the brake device. A master cylinder having a braking hydraulic pressure, a hydraulic pressure converting means for converting the pedal force applied to the brake pedal into hydraulic pressure, and a predetermined boost of the braking hydraulic pressure to the master cylinder in response to an output signal from a pedal force detection sensor provided in the hydraulic pressure converting means. An electromagnetic servo brake device is provided, which includes an electromagnetic means that acts on the brake oil chamber of the driver. It is conceivable to generate brake oil pressure and apply this brake oil pressure to the brake oil chamber of the master cylinder.
しかしながら、この場合には、ブレーキペダル
を徐々に踏込む通常の制動時には、電磁手段の作
動が応答性良く追随し、直ちに所定倍力の制動油
圧が発生するので、良好なブレーキ性能を確保で
きるが、一方ブレーキペダルを素早く踏込む急制
動時には、電磁手段の作動が応答性良く追随しな
いため、所定倍力の制動油圧の発生に遅れが生じ
て、効果的なブレーキ作用が遅れることになる。
しかも、上記急制動時において、マスタシリンダ
の制動油室内部がその急な容積膨張により負圧に
なると、該制動油室内でキヤビテーシヨンが発生
して、電磁手段のピストンの無効ストロークが増
大することになり、これを補償しようとすると、
ピストンの必要ストローク量の大きいものを要し
て電磁手段が大型化することになる。 However, in this case, during normal braking in which the brake pedal is gradually depressed, the operation of the electromagnetic means follows with good response, and a predetermined boost of braking hydraulic pressure is immediately generated, so good braking performance can be ensured. On the other hand, when the brake pedal is quickly depressed to apply sudden braking, the operation of the electromagnetic means does not follow with good response, so there is a delay in the generation of braking hydraulic pressure with a predetermined boost, resulting in a delay in effective braking action.
Moreover, during the above-mentioned sudden braking, if the inside of the brake oil chamber of the master cylinder becomes negative pressure due to the sudden volume expansion, cavitation will occur in the brake oil chamber and the invalid stroke of the piston of the electromagnetic means will increase. If you try to compensate for this,
A piston with a large required stroke amount is required, which results in an increase in the size of the electromagnetic means.
(発明の目的)
本発明は斯かる点に鑑みてなされたもので、そ
の目的とするところは、上記の如き電磁サーボブ
レーキ装置において、ブレーキペダルを素早く踏
込む急制動時には、上記ブレーキペダルの踏込操
作に基づいて油を電磁手段に先立つて別途にマス
タシリンダの制動油室に供給するようにすること
により、電磁手段の作動遅れを補償して、急制動
時においても良好なブレーキ性能を確保するとと
もに、マスタシリンダの制動油室内でのキヤビテ
ーシヨンの発生を確実に防止して、電磁手段を必
要ストローク量の小さなものに選定できて、その
小型軽量化を図ることにある。(Object of the Invention) The present invention has been made in view of the above-mentioned points, and its purpose is to provide an electromagnetic servo brake device such as the one described above, in which the brake pedal is depressed quickly during sudden braking. By separately supplying oil to the brake oil chamber of the master cylinder prior to the electromagnetic means based on the operation, the delay in operation of the electromagnetic means is compensated for and good braking performance is ensured even during sudden braking. Another object of the present invention is to reliably prevent cavitation in the brake oil chamber of the master cylinder, select an electromagnetic means with a small required stroke amount, and reduce the size and weight of the electromagnetic means.
(発明の構成)
上記目的を達成するため、本発明の解決手段
は、上記の如く制動油室を有するマスタシリンダ
と、ブレーキペダルに加えられる踏力を油圧に変
換する油圧変換手段と、該油圧変換手段に設けら
れた踏力検出センサの出力信号を受けて所定倍力
の制動油圧を上記マスタシリンダの制動油室に作
用させる電磁手段とを設けるとともに、上記油圧
変換手段の油室とマスタシリンダの制動油室とを
連通するバイパス通路を設け、該バイパス通路
に、ブレーキペダルの踏込時に上記油圧変換手段
の油室内の油をマスタシリンダの制動油室に流入
させるチエツクバルブを設けたものである。(Structure of the Invention) In order to achieve the above object, the solution means of the present invention includes a master cylinder having a brake oil chamber as described above, a hydraulic pressure conversion means for converting the pedal force applied to the brake pedal into hydraulic pressure, and the hydraulic pressure conversion means. electromagnetic means for applying a predetermined boost of braking oil pressure to the brake oil chamber of the master cylinder in response to an output signal from a pedal force detection sensor provided in the means; A bypass passage communicating with the oil chamber is provided, and a check valve is provided in the bypass passage for causing oil in the oil chamber of the hydraulic pressure conversion means to flow into the brake oil chamber of the master cylinder when the brake pedal is depressed.
このことにより、本発明では、ブレーキペダル
を素早く踏込む急制動時、電磁手段で所定倍力の
制動油圧が発生するのに先立つて、上記ブレーキ
ペダルの踏込操作に応じて油圧変換手段の油室内
が圧力上昇すると、該油室内の油をバイパス通路
を経てチエツク弁を開きながらマスタシリンダの
制動油室に供給するようにしたものである。 As a result, in the present invention, when the brake pedal is quickly depressed during sudden braking, the oil pressure converting means has an oil chamber in the oil pressure converting means in response to the depression operation of the brake pedal, before the electromagnetic means generates a predetermined boost of braking hydraulic pressure. When the pressure rises, the oil in the oil chamber is supplied to the brake oil chamber of the master cylinder via a bypass passage while opening a check valve.
(発明の効果)
したがつて、本発明の自動車の電磁サーボブレ
ーキ装置によれば、ブレーキペダルを素早く踏込
む急制動時、マスタシリンダ内で急に容積膨張す
る制動油室内には、電磁手段の所定倍力の制動油
圧の発生に先立つて、油圧変換手段の油室内の油
がバイパス通路を経てチエツクバルブを開きなが
ら押込み供給されるので、電磁手段の作動遅れを
補償して、良好なブレーキ性能を確保できるとと
もに、上記マスタシリンダの制動油室内への油の
供給により該制動油室内でのキヤビテーシヨンの
発生が確実に防止されるので、電磁手段をピスト
ンの必要ストロークを小さなものに選定できて、
その小型軽量化を図ることができるものである。(Effects of the Invention) Therefore, according to the electromagnetic servo brake device for a motor vehicle of the present invention, the electromagnetic means is provided in the brake oil chamber whose volume suddenly expands in the master cylinder when the brake pedal is quickly depressed to apply sudden braking. Prior to the generation of braking hydraulic pressure with a predetermined boost, the oil in the oil chamber of the hydraulic pressure conversion means is forced and supplied through the bypass passage while opening the check valve, thereby compensating for the delay in the operation of the electromagnetic means and achieving good braking performance. In addition, the supply of oil into the brake oil chamber of the master cylinder reliably prevents cavitation from occurring in the brake oil chamber, so the electromagnetic means can be selected to have a small required stroke of the piston.
This allows the device to be made smaller and lighter.
(実施例)
以下、本発明の技術的手段の具体例としての実
施例を図面に基づいて説明する。(Example) Hereinafter, an example as a specific example of the technical means of the present invention will be described based on the drawings.
図面において、1はブレーキペダル、2はブレ
ーキペダル1の踏込操作時に制動油圧を発生する
マスタシリンダであつて、該マスタシリンダ2
は、シリンダボデイ2a内に摺動自在に嵌挿した
1次ピストン3および2次ピストン4によつて区
画形成された1次油室5および2次油室6を有
し、該各油室5,6内にはそれぞれリターンスプ
リング7,8が縮装されているとともに、該第1
および第2油室5,6内はそれぞれ、その上部に
形成したリリーフポート5a,6aを介してリザ
ーブタンク9に連通され、1次油室5下部は油圧
通路10を介して前輪側ブレーキ装置(図示せ
ず)に、また第2油室6下部は油圧通路11を介
して後輪側ブレーキ装置(図示せず)にそれぞれ
連通されている。また、上記1次ピストン3の図
中右方に配置されたプツシユロツド12は、その
後端部が後述する油圧変換手段20のピストン2
1およびオペレーテイングロツド13を介してブ
レーキペダル1に連繋されており、ブレーキペダ
ル1の踏込操作時、プツシユロツド12で1次お
よび2次ピストン3,4を前進動せしめて両リリ
ーフポート5a,5bを閉じることにより、1次
および2次油室5,6内に制動油圧を発生させる
ようになされている。また、上記1次ピストン3
の図中右方には、1次ピストン3後部とシリンダ
ボデイ2aに固着した隔壁部材14とで制動油室
15が形成されており、ブレーキペダル1の踏込
操作時、該制動油室15への油圧の供給により1
次ピストン3後面をプツシユロツド12と共に図
中左方に押圧して、前輪側および後輪側ブレーキ
への制動油圧を倍力するようになされている。 In the drawing, 1 is a brake pedal, and 2 is a master cylinder that generates braking hydraulic pressure when the brake pedal 1 is depressed.
has a primary oil chamber 5 and a secondary oil chamber 6 defined by a primary piston 3 and a secondary piston 4 that are slidably inserted into the cylinder body 2a, and each oil chamber 5 , 6 are compressed with return springs 7, 8, respectively, and the first
The insides of the second oil chambers 5 and 6 are communicated with a reserve tank 9 through relief ports 5a and 6a formed in their upper parts, respectively, and the lower part of the primary oil chamber 5 is connected to the front wheel brake system ( (not shown), and the lower part of the second oil chamber 6 is communicated with a rear wheel brake device (not shown) via a hydraulic passage 11. In addition, the push rod 12 disposed to the right of the primary piston 3 in the drawing has a rear end that is connected to the piston 2 of the hydraulic pressure converting means 20, which will be described later.
1 and an operating rod 13, and when the brake pedal 1 is depressed, the push rod 12 moves the primary and secondary pistons 3, 4 forward to open both relief ports 5a, 5b. By closing, braking oil pressure is generated in the primary and secondary oil chambers 5 and 6. In addition, the primary piston 3
On the right side of the figure, a brake oil chamber 15 is formed by the rear part of the primary piston 3 and a partition member 14 fixed to the cylinder body 2a, and when the brake pedal 1 is depressed, the brake oil chamber 15 is 1 by supplying hydraulic pressure
The rear surface of the next piston 3 is pushed together with the push rod 12 to the left in the drawing to double the braking oil pressure to the front and rear wheel brakes.
また、20はブレーキペダル1に加えられる踏
力を油圧に変換する油圧変換手段であつて、該油
圧変換手段20は、ブレーキペダル1にオペレー
テイングロツド13を介して連繋されたピストン
21を有し、該ピストン21前部と上記マスタシ
リンダ2のプツシユロツド12後部との間には第
1油室22が、また該プツシユロツド12後部と
マスタシリンダ2の隔壁部材14との間には第2
油室23がそれぞれ形成され、該両油室22,2
3間は上記プツシユロツド12後部に形成した連
通路24により連通されている。また、上記第1
油室22内にはリターンスプリング25が縮装さ
れているとともに、上記連通路24を開閉する開
閉ピン26がピストン21の前端部にコ字状部材
29を介して若干遊びを持たせて連結されてい
る。一方、第2油室23内には同様のリターンス
プリング27が縮装されているとともに、その上
部に形成したリリーフポート23aを介してリザ
ーブタンク28に開放されており、よつてブレー
キペダル1の踏込時には、ピストン21の前進動
により開閉ピン26で連通路24を閉じて、第1
油室22内の油圧を高めることにより、ブレーキ
ペダル1に加えられる踏力を油圧に変換するよう
に構成されている。そして、上記油圧変換手段2
0には、ブレーキペダル1の踏力とマスタシリン
ダ2の制動油室15の制動油圧と圧力差に応動す
るバランスシリンダ30が設けられており、該バ
ランスシリンダ30は、油圧変換手段20の1次
油室22の油圧とマスタシリンダ2の制動油室1
5内の油圧と圧力差に応じて上下動するバランス
ピストン31と、該バランスピストン31の上方
に中間部材32を介して配置され、バランスピス
トン31の上下動に応じてシリンダボデイ30a
の上部に螺合せしめた固定部材33に押圧される
踏力検出センサ34とを備えており、該踏力検出
センサ34からの出力信号(圧力信号)は、該出
力信号を増幅するコントローラ35に入力されて
いる。 Further, 20 is a hydraulic pressure converting means for converting the pedal force applied to the brake pedal 1 into hydraulic pressure, and the hydraulic pressure converting means 20 has a piston 21 connected to the brake pedal 1 via an operating rod 13. A first oil chamber 22 is provided between the front part of the piston 21 and the rear part of the push rod 12 of the master cylinder 2, and a second oil chamber 22 is provided between the rear part of the push rod 12 and the partition wall member 14 of the master cylinder 2.
Oil chambers 23 are formed respectively, and both oil chambers 22, 2
3 are communicated through a communication passage 24 formed at the rear of the push rod 12. In addition, the first
A return spring 25 is compressed in the oil chamber 22, and an opening/closing pin 26 for opening and closing the communication passage 24 is connected to the front end of the piston 21 via a U-shaped member 29 with some play. ing. On the other hand, a similar return spring 27 is compressed in the second oil chamber 23, and is opened to a reserve tank 28 through a relief port 23a formed in the upper part of the second oil chamber 23. Sometimes, the forward movement of the piston 21 closes the communication passage 24 with the opening/closing pin 26, and the first
By increasing the oil pressure in the oil chamber 22, the pedal force applied to the brake pedal 1 is converted into oil pressure. Then, the hydraulic conversion means 2
0 is provided with a balance cylinder 30 that responds to the pressure difference between the depression force on the brake pedal 1 and the braking oil pressure in the brake oil chamber 15 of the master cylinder 2. Oil pressure in chamber 22 and brake oil chamber 1 in master cylinder 2
A balance piston 31 that moves up and down according to the oil pressure and pressure difference in the cylinder body 30a is disposed above the balance piston 31 via an intermediate member 32, and moves up and down according to the up and down movement of the balance piston 31.
The pedal is equipped with a pedal force detection sensor 34 that is pressed by a fixed member 33 screwed onto the upper part of the pedal, and an output signal (pressure signal) from the pedal force detection sensor 34 is input to a controller 35 that amplifies the output signal. ing.
さらに、40は上記マスタシリンダ2の制動油
室15に所定倍力の制動油圧を作用させる電磁手
段であつて、該電磁手段40は、上記コントロー
ラ35からの増幅された圧力信号(出力信号)を
受けて例示させるソレノイド41aを有する電磁
石41と、該電磁石41により吸引されて図中左
方に前進動するプランジヤ42と、該プランジヤ
42の中央部において前後方向に挿通固定された
ロツド43と、該ロツド43により押圧されてシ
リンダボデイ40a内を摺動するピストン44と
を備え、該ピストン44の図中左方に形成した油
室45内にはリターンスプリング46が縮装され
ているともに、該油室45は、シリンダボデイ4
0aは左端中央部においてリリーフ通路47を介
してリザーブタンク48に開放され、且つシリン
ダボデイ40a左端下部において油供給通路49
を介してマスタシリンダ2の制動油室15に連通
されている。また、上記油室45内には、リリー
フ通路47を開閉する開閉ピン50がピストン4
4前部に出没自在に嵌挿されており、よつて電磁
石41への圧力信号の給電時には、プランジヤ4
2のロツド43によりピストン44前進させなが
ら開閉ピン50でリリーフ通路47を閉じること
により、油室45内に所定倍力の制御油圧を発生
させて、これを油供給通路49を経てマスタシリ
ンダ2の制動油室15に作用させるように構成さ
れている。 Furthermore, 40 is an electromagnetic means for applying a predetermined boost of braking oil pressure to the brake oil chamber 15 of the master cylinder 2, and the electromagnetic means 40 receives an amplified pressure signal (output signal) from the controller 35. An electromagnet 41 having a solenoid 41a as shown in FIG. It is equipped with a piston 44 that is pressed by a rod 43 and slides inside the cylinder body 40a, and a return spring 46 is compressed in an oil chamber 45 formed on the left side of the piston 44 in the figure. The chamber 45 is the cylinder body 4
0a is open to a reserve tank 48 via a relief passage 47 at the center of the left end, and an oil supply passage 49 at the lower left end of the cylinder body 40a.
It communicates with the brake oil chamber 15 of the master cylinder 2 via. Further, in the oil chamber 45, an opening/closing pin 50 for opening and closing the relief passage 47 is provided on the piston 4.
The plunger 4 is inserted into the front part of the plunger 4 so as to be freely retractable.
By closing the relief passage 47 with the opening/closing pin 50 while moving the piston 44 forward with the second rod 43, a predetermined boost of control oil pressure is generated in the oil chamber 45, and this is sent to the master cylinder 2 through the oil supply passage 49. It is configured to act on the brake oil chamber 15.
そして、マスタシリンダ2の隔壁部材14外周
には、油圧変換手段20の第2油室23とマスタ
シリンダ2の制動油室15とを連通するバイパス
通路55が設けられているとともに、該バイパス
通路55には、油圧変換手段20の第2油室23
からマスタシリンダ2の制御油室15への油流れ
を許容するチエツクバルブ56が設けられてお
り、ブレーキペダル1の踏込時、マスタシリンダ
2のプツシユロツド12が前進すると、油圧変換
手段20の第2油室23が縮少して油圧が上昇す
ることにより、該第2油室23内の油をバイパス
通路55経てチエツクバルブ56を開きながらマ
スタシリンダ2の制動油室15に押込み流入させ
るように構成されている。尚、油圧変換手段20
の第2油室23のリリーフポート23aには、チ
エツクバルブ57が設けられており、第2油室2
3の容積収縮時、該第2油室23内の油が所定の
圧力に達したときのみリザーブタンク28に流入
するようになつている。 A bypass passage 55 is provided on the outer periphery of the partition member 14 of the master cylinder 2 to communicate the second oil chamber 23 of the hydraulic pressure conversion means 20 and the brake oil chamber 15 of the master cylinder 2. , the second oil chamber 23 of the hydraulic pressure conversion means 20
A check valve 56 is provided to allow oil to flow from the brake pedal to the control oil chamber 15 of the master cylinder 2. When the push rod 12 of the master cylinder 2 moves forward when the brake pedal 1 is depressed, the second oil of the hydraulic conversion means 20 When the chamber 23 contracts and the oil pressure increases, the oil in the second oil chamber 23 is forced to flow into the brake oil chamber 15 of the master cylinder 2 through the bypass passage 55 while opening the check valve 56. There is. In addition, the hydraulic conversion means 20
A check valve 57 is provided in the relief port 23a of the second oil chamber 23.
3, the oil in the second oil chamber 23 flows into the reserve tank 28 only when it reaches a predetermined pressure.
次に、上記実施例の作動について説明する。先
ず、ブレーキペダル1を徐々に踏込む通常の制動
時には、マスタシリンダ2のプツシユロツド12
の前進動は緩やかであり、制動油室15の容積膨
張はさほど急に行われない。このため、電磁手段
40の応答時間、すなわちブレーキペダル1の踏
込操作開始後、油圧変換手段20の第1油室22
内の油圧が上昇し、バランスシリンダ30が作動
し、その出力信号としての圧力信号が電磁手段4
0の電磁石41に給電され、そのプランジヤ42
が前進して、所定倍力の制動油圧が発生し、これ
がマスタシリンダ2の制動油室15内に供給され
て作用するまでのあいだ、制動油室15の容積膨
張はわずかであつて、制動油室15内でキヤビテ
ーシヨンが発生することはなく、ブレーキペダル
1の踏力は応答性良く倍力される。 Next, the operation of the above embodiment will be explained. First, during normal braking in which the brake pedal 1 is gradually depressed, the push rod 12 of the master cylinder 2
The forward movement of the brake oil chamber 15 is gradual, and the volume expansion of the brake oil chamber 15 is not performed very suddenly. Therefore, during the response time of the electromagnetic means 40, that is, after the start of the depression operation of the brake pedal 1, the first oil chamber 22 of the hydraulic pressure conversion means 20
The hydraulic pressure inside rises, the balance cylinder 30 operates, and the pressure signal as an output signal is sent to the electromagnetic means 4.
0 electromagnet 41 is supplied with power, and its plunger 42
advances, a predetermined boost of braking oil pressure is generated, and until this is supplied to the brake oil chamber 15 of the master cylinder 2 and acts, the volumetric expansion of the brake oil chamber 15 is small, and the brake oil is Cavitation does not occur within the chamber 15, and the force applied to the brake pedal 1 is boosted with good responsiveness.
一方、ブレーキペダル1を素早く踏込む急制動
時には、マスタシリンダ2のプツシユロツド12
の前進動は速く、制動油室15の容積膨張は急に
行われる。このため、電磁手段40の作動に応答
遅れが生じ、制動油室15内に電磁手段40から
の所定倍力の制動油圧が作用する時点では該制動
油室15の容積膨張は大きい。しかし、それまで
の間は、油圧変換手段20の第2油室23内がプ
ツシユロツド12の前進動に応じて圧力上昇し、
その油がリザーブタンク28に戻されずにバイパ
ス通路55を経てチエツクバルブ56を開きなが
ら制動油室15内に押込み流入されるので、ブレ
ーキペダル1の踏力は応答性良く倍力されて、良
好なブレーキ性能が確保されることになる。しか
も、油圧変換手段20の第2油室23内の押込み
流入により、制動油室15内では圧力低下せずに
キヤビテーシヨンの発生が確実に防止されるの
で、電磁手段40のピストン44の無効ストロー
クを低減して、その必要ストローク量を小さくで
き、よつて電磁石41ひいては電磁手段40の小
量軽量化を図ることができる。 On the other hand, during sudden braking when the brake pedal 1 is quickly depressed, the push rod 12 of the master cylinder 2
The forward motion of the brake oil chamber 15 is fast, and the volume of the brake oil chamber 15 is rapidly expanded. For this reason, a response delay occurs in the operation of the electromagnetic means 40, and the volume expansion of the brake oil chamber 15 is large at the time when a predetermined boost of brake oil pressure from the electromagnetic means 40 acts on the brake oil chamber 15. However, until then, the pressure inside the second oil chamber 23 of the hydraulic pressure conversion means 20 increases in accordance with the forward movement of the push rod 12.
The oil is not returned to the reserve tank 28, but is forced into the brake oil chamber 15 via the bypass passage 55 while opening the check valve 56, so the depression force on the brake pedal 1 is boosted with good response, resulting in good braking. Performance will be ensured. Moreover, the forced inflow into the second oil chamber 23 of the hydraulic pressure converting means 20 reliably prevents the occurrence of cavitation in the brake oil chamber 15 without causing a pressure drop. By reducing the required stroke amount, the electromagnet 41 and, by extension, the electromagnetic means 40 can be made smaller and lighter.
図面は本発明の実施例を示す全体構成図であ
る。
1……ブレーキペダル、2……マスタシリン
ダ、15……制動油室、20……油圧変換手段、
22……第1油室、23……第2油室、40……
電磁手段、55……バイパス通路、56……チエ
ツクバルブ。
The drawing is an overall configuration diagram showing an embodiment of the present invention. 1...Brake pedal, 2...Master cylinder, 15...Brake oil chamber, 20...Hydraulic pressure conversion means,
22...First oil chamber, 23...Second oil chamber, 40...
Electromagnetic means, 55...bypass passage, 56...check valve.
Claims (1)
キペダルに加えられる踏力を油圧に変換する油圧
変換手段と、該油圧変換手段に設けられた踏力検
出センサの出力信号を受けて所定倍力の制動油圧
を上記マスタシリンダの制動油室に作用させる電
磁手段と、上記油圧変換手段の油室のマスタシリ
ンダの制動油室とを連通するバイパス通路と、該
バイパス通路に設けられブレーキペダルの踏込時
に上記油圧変換手段の油室内の油をマスタシリン
ダの制動油室に流入させるチエツクバルブとを備
えたことを特徴とする自動車の電磁サーボブレー
キ装置。1 A master cylinder having a brake oil chamber, a hydraulic pressure converting means for converting the pedal force applied to the brake pedal into hydraulic pressure, and a brake hydraulic pressure having a predetermined boost in response to an output signal from a pedal force detection sensor provided in the hydraulic pressure converting means. an electromagnetic means that acts on the brake oil chamber of the master cylinder; a bypass passage that communicates the oil chamber of the oil pressure conversion means with the brake oil chamber of the master cylinder; An electromagnetic servo brake device for an automobile, comprising a check valve that allows oil in an oil chamber of the means to flow into a braking oil chamber of a master cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59075426A JPS60219154A (en) | 1984-04-13 | 1984-04-13 | Electromagnetic servo-valve brake device for automobile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59075426A JPS60219154A (en) | 1984-04-13 | 1984-04-13 | Electromagnetic servo-valve brake device for automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60219154A JPS60219154A (en) | 1985-11-01 |
JPH0549509B2 true JPH0549509B2 (en) | 1993-07-26 |
Family
ID=13575867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59075426A Granted JPS60219154A (en) | 1984-04-13 | 1984-04-13 | Electromagnetic servo-valve brake device for automobile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60219154A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6347842B1 (en) | 1999-01-11 | 2002-02-19 | Toyota Jidosha Kabushiki Kaisha | Braking hydraulic pressure source apparatus wherein assisting pressure is electrically controlled to establish predetermined overall boosting ratio |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4840600B2 (en) * | 2007-07-30 | 2011-12-21 | 日立オートモティブシステムズ株式会社 | Electric booster |
-
1984
- 1984-04-13 JP JP59075426A patent/JPS60219154A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6347842B1 (en) | 1999-01-11 | 2002-02-19 | Toyota Jidosha Kabushiki Kaisha | Braking hydraulic pressure source apparatus wherein assisting pressure is electrically controlled to establish predetermined overall boosting ratio |
Also Published As
Publication number | Publication date |
---|---|
JPS60219154A (en) | 1985-11-01 |
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