JPS6029364A - Negative-pressure source device of negative-pressure type booster for car - Google Patents
Negative-pressure source device of negative-pressure type booster for carInfo
- Publication number
- JPS6029364A JPS6029364A JP13844383A JP13844383A JPS6029364A JP S6029364 A JPS6029364 A JP S6029364A JP 13844383 A JP13844383 A JP 13844383A JP 13844383 A JP13844383 A JP 13844383A JP S6029364 A JPS6029364 A JP S6029364A
- Authority
- JP
- Japan
- Prior art keywords
- negative
- negative pressure
- pressure
- air
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、自動車その他の車両においてブレーキマスク
シリンダ等を倍力作動するのに用いられる負圧式倍力装
置の負圧源装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a negative pressure source device for a negative pressure booster used to boost a brake mask cylinder or the like in an automobile or other vehicle.
従来、車両用負圧式倍力装置の負圧源装置として、内燃
機関の絞弁より下流の吸入系に負圧取出孔を設け、この
負圧取出孔に負圧倍力装置の負圧室を逆止弁を介して接
続し、エンジンの吸入負圧な、倍力装置の動力としてそ
の負圧室に蓄えるようにしたものが知られている。Conventionally, as a negative pressure source device for a negative pressure booster for a vehicle, a negative pressure outlet hole is provided in the intake system downstream of the throttle valve of the internal combustion engine, and the negative pressure chamber of the negative pressure booster is connected to this negative pressure outlet hole. It is known that the engine is connected via a check valve, and the engine's intake negative pressure is stored in the negative pressure chamber as power for the booster.
ところで、自動車に搭載された内燃機関の形式、その付
属機器の種類によっては（例えば、機関が２サイクル式
の場合、多連式気化器を備える場合、ある（・は自動変
速機付の場合等）、機関の使用負圧が非常に低く、一般
には−５００１ｎ７ＩＬＩＩｇ程度あるのに対し、−３
００〜−４，ｏ ｏ ｍｍ１ｉ’ｇ程度しか得られない
ことがある。このような場合、従来では、倍力装置の受
圧部の受圧面積を広げて所定の倍力比を確保しているが
、そのようにすれば倍力装置の大型化を招き、車両の狭
いエンジンルーム等への設置を困難にする問題を生じる
。By the way, depending on the type of internal combustion engine installed in the car and the type of its accessory equipment (for example, if the engine is a two-stroke type, if it is equipped with a multiple carburetor, or if it is equipped with an automatic transmission, etc.) ), the negative pressure used by the engine is very low, generally around -5001n7ILIIg, but -3
In some cases, only about 00 to -4,0 mm1i'g can be obtained. In such cases, the conventional method is to widen the pressure receiving area of the pressure receiving part of the booster to ensure a predetermined boost ratio. This creates a problem that makes installation in a room, etc. difficult.
本発明は上記に鑑み提案されたもので、内燃機関の吸入
負圧が低い場合でも空気エゼクタを用いることにより負
圧式倍力装置に、その作動に必要な高負圧を供給し得る
ようにした、簡単有効な前記負圧源装置を提供すること
を目的とし、その特徴は、内燃機関の絞弁を備えた吸入
系のエアクリーナに空気エゼクタの空気入口を連通ずる
と共に、該絞弁まり下流の該吸入系に設けた負圧取出孔
に該空気エゼクタの空気出口を接続し、該空気エゼクタ
の減圧室には負圧倍力装置の負圧室を接続したところに
ある。The present invention was proposed in view of the above, and it is possible to supply a negative pressure booster with the high negative pressure necessary for its operation by using an air ejector even when the intake negative pressure of an internal combustion engine is low. The purpose of the present invention is to provide a simple and effective negative pressure source device, and its features are that the air inlet of the air ejector is communicated with the air cleaner of the suction system equipped with the throttle valve of the internal combustion engine, and the air inlet of the air ejector is connected to An air outlet of the air ejector is connected to a negative pressure outlet provided in the suction system, and a negative pressure chamber of a negative pressure booster is connected to a reduced pressure chamber of the air ejector.
以下、図面により本発明の一実施例について説明すると
、第１図においてＳは自動車のブレーキマスクシリンダ
を作動するための公知の負圧式倍力装置であってブレー
キペダルＢｐにより操作される。この倍力装置Ｓのブー
スタシェル１内にはダイヤフラム付ブースタピストン２
により負圧室３が画成されている。またＥは自動車の内
燃機関で、その吸入系４は吸入マニホールド５と、その
上流端に装着された気化器６とより構成され、気化器６
の吸気道６ａ入口にはエアクリーナＡｃが装着される。Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, S is a known negative pressure booster for operating a brake mask cylinder of an automobile, and is operated by a brake pedal Bp. Inside the booster shell 1 of this booster S is a booster piston 2 with a diaphragm.
A negative pressure chamber 3 is defined by. Further, E is an internal combustion engine of an automobile, and its intake system 4 is composed of an intake manifold 5 and a carburetor 6 installed at its upstream end.
An air cleaner Ac is installed at the entrance of the intake passage 6a.
気化器６は従来普通のように絞弁７を有する。この絞弁
７より下流の吸入系４に負圧取出孔８が設けられ、この
負圧取出孔８と前記倍力装置Ｓの負圧室３との間を結ぶ
負圧通路９に空気エゼクタ１０が次のように設けられる
。尚、負圧通路９において負圧取出孔８と空気エゼクタ
１０との間の区間を上流負圧通路９α、空気エゼクタ１
０と負圧室３との間の区間を下流負圧通路９ｈと呼ぶ。The carburetor 6 has a throttle valve 7 as usual. A negative pressure outlet hole 8 is provided in the suction system 4 downstream of this throttle valve 7, and an air ejector 10 is provided in a negative pressure passage 9 connecting this negative pressure outlet hole 8 and the negative pressure chamber 3 of the booster S. is established as follows. In addition, in the negative pressure passage 9, the section between the negative pressure outlet hole 8 and the air ejector 10 is referred to as the upstream negative pressure passage 9α, and the air ejector 1
0 and the negative pressure chamber 3 is called a downstream negative pressure passage 9h.
第２図に示すように、空気エゼクタ１００本体１１には
、その前面に開口する空気人口１２と、その後面に開口
する空気出口１３と、その側面に開口する吸引口１４と
、吸引口１４及び空気出口１３にそれぞれ連なる減圧室
１５及び出口室１６と、この画室１５．１６間を連通す
るディフューザ１７とが設けられる。空気人口１２は空
気通路２５及び前記エアクリーナＡＣを介して大気に連
通され、空気出口１３は上流負圧通路９ａの下流端と接
続される。また吸引口１４は下流負圧通路９ｈの上流端
と接続される。As shown in FIG. 2, the main body 11 of the air ejector 100 has an air intake 12 opened at its front surface, an air outlet 13 opened at its rear surface, a suction port 14 opened at its side surface, and an air outlet 12 opened at its front surface. A decompression chamber 15 and an outlet chamber 16 each connected to the air outlet 13, and a diffuser 17 communicating between the compartments 15 and 16 are provided. The air population 12 is communicated with the atmosphere through the air passage 25 and the air cleaner AC, and the air outlet 13 is connected to the downstream end of the upstream negative pressure passage 9a. Further, the suction port 14 is connected to the upstream end of the downstream negative pressure passage 9h.
尚、図示例では、空気通路２５をエアクリーナＡｃに接
続したが、気化器６の吸気道６ａ入ロ近傍部に接続する
こともできる（第１図鎖線示参照）。In the illustrated example, the air passage 25 is connected to the air cleaner Ac, but it can also be connected to the vicinity of the intake passage 6a of the carburetor 6 (see the dashed line in FIG. 1).
いずれによるもエアクリーナＡｃで浄化された外気は気
化器６には勿論、空気通路２５にも吸入される。In either case, the outside air purified by the air cleaner Ac is sucked into the air passage 25 as well as into the carburetor 6.
ディフューザ１７は減圧室１５の一端面に形成した先細
テーパ部１８と、出口室１６の一端面に形成した末広テ
ーパ部１９と、この両テーバ部１８゜１９間を接ぐのど
部２０とよりなっており、減圧室１５には空気入口１２
に連なり且つ噴孔なのど部２０に向けたノズル２１が先
細テーパ部１８に近接して配設される。The diffuser 17 consists of a tapered part 18 formed on one end surface of the decompression chamber 15, a diverging taper part 19 formed on one end surface of the outlet chamber 16, and a throat part 20 that connects the two tapered parts 18 and 19. The decompression chamber 15 has an air inlet 12.
A nozzle 21 is disposed adjacent to the tapered portion 18 and is continuous with the nozzle 21 and directed toward the throat portion 20 of the nozzle hole.
さらに本体１１には、ディフューザ１１を迂回して空気
出口１３及び吸引口１４間を接続し且つディフューザ１
γよ、りも流路抵抗の小さいバイパス２２が設けられ、
このバイパス２２に第１逆止弁２３が設けられる。また
第１図に示すように、バイパス２２と負圧室３−との間
の負圧通路９には第２逆止弁２４が設けられ、第１及び
第２逆止弁２３゜２４はいずれも負圧室３側から負圧取
出孔８側への負圧の逆流を阻止するように構成される。Further, in the main body 11, the air outlet 13 and the suction port 14 are connected by bypassing the diffuser 11, and the diffuser 1
γ, a bypass 22 with low flow path resistance is provided,
A first check valve 23 is provided in this bypass 22 . Further, as shown in FIG. 1, a second check valve 24 is provided in the negative pressure passage 9 between the bypass 22 and the negative pressure chamber 3-, and the first and second check valves 23 and 24 are connected to each other. is also configured to prevent negative pressure from flowing backward from the negative pressure chamber 3 side to the negative pressure outlet hole 8 side.
次にこの実施例の作用を説明する。Next, the operation of this embodiment will be explained.
いま、内燃機関Ｅが始動され、それに伴い絞弁７より下
流の吸入系４に負圧が発生すれば、この吸入負圧は負圧
取出孔８より取出され上流負圧通路９ａを経て出口室１
６とバイパス２２とに作用する。そして、バイパス２２
に作用する負圧は第１逆止弁２３を開いて下流負圧通路
９ｂへ進み、次いで第２逆止弁２４を開いて倍力装置Ｓ
の負圧室３に到達し、ここに蓄えられる。Now, when the internal combustion engine E is started and negative pressure is generated in the suction system 4 downstream of the throttle valve 7, this suction negative pressure is taken out from the negative pressure outlet hole 8 and passes through the upstream negative pressure passage 9a to the outlet chamber. 1
6 and bypass 22. And bypass 22
The negative pressure acting on the first check valve 23 is opened to proceed to the downstream negative pressure passage 9b, and then the second check valve 24 is opened to proceed to the booster S.
reaches the negative pressure chamber 3 and is stored there.
一方、出口室１６に作用する負圧はディフューザ１７を
経てノズル２１の噴口に作用し、この負圧の吸引力を以
てノズル２１は、エアクリーナＡｃで浄化された外気を
空気人口１２より吸入してディフューザ１７に向けて噴
射し、空気の高速噴流を生起させ、これに伴い減圧室１
５は減圧されるので、吸引口１４より空気を吸引して下
流負圧通路９ｂを更に減圧し、即ち負圧室３の負圧を高
める。そして、減圧室１５の吸引負圧が機関Ｅの吸入負
圧より高くなれば第１逆止弁２３が閉じられるので、減
圧室１５の負圧はバイパス２２に短絡することなく負圧
室３に確実に導入される。したがって、負圧室３には機
関Ｅの吸入負圧と空気エゼクタ１０の吸引負圧との総合
負圧が蓄えられる。On the other hand, the negative pressure acting on the outlet chamber 16 acts on the outlet of the nozzle 21 via the diffuser 17, and with the suction force of this negative pressure, the nozzle 21 sucks the outside air purified by the air cleaner Ac from the air port 12 and sends it to the diffuser. 17 to generate a high-speed jet of air, which causes the decompression chamber 1 to
5 is reduced in pressure, air is sucked through the suction port 14 to further reduce the pressure in the downstream negative pressure passage 9b, that is, to increase the negative pressure in the negative pressure chamber 3. Then, when the suction negative pressure in the depressurization chamber 15 becomes higher than the suction negative pressure of the engine E, the first check valve 23 is closed, so that the negative pressure in the depressurization chamber 15 flows into the negative pressure chamber 3 without being short-circuited to the bypass 22. It will definitely be introduced. Therefore, the total negative pressure of the suction negative pressure of the engine E and the suction negative pressure of the air ejector 10 is stored in the negative pressure chamber 3.
絞弁７を急開させて行う機関Ｅの加速運転や機関Ｅの運
転停止により、機関Ｅの吸入負圧が急減若しくは消去す
れば、空気エゼクタ１０の減圧機能が低下若しくは停止
するが、これに伴い第２逆止弁２４が直ちに閉じるので
、負圧室３の負圧が負圧通路９を逆流することは阻止さ
れる。If the suction negative pressure of the engine E suddenly decreases or disappears due to acceleration of the engine E or stoppage of the engine E by rapidly opening the throttle valve 7, the pressure reducing function of the air ejector 10 will decrease or stop. Since the second check valve 24 closes immediately, the negative pressure in the negative pressure chamber 3 is prevented from flowing back through the negative pressure passage 9.
尚、機関Ｅの始動後、負圧室３の負圧が機関Ｅの吸入負
圧の値に到達するまでの時間の長短があまり問題になら
ない場合には、バイパス２２及び第１逆止弁２３を省略
することができる。Note that if the length of time it takes for the negative pressure in the negative pressure chamber 3 to reach the value of the suction negative pressure of the engine E after starting the engine E does not matter much, the bypass 22 and the first check valve 23 can be omitted.
以上のように本発明によれば、内燃機関の絞弁より下流
の吸入系に設けた負圧取出孔に空気エゼクタの空気出口
を接続し、この空気エゼクタの減圧室に負圧式倍力装置
の負圧室を接続したので、機関の吸入負圧により空気エ
ゼクタを作動させて空気エゼクタの減圧室に発生する、
機関の吸入負圧よりも高い吸引負圧を倍力装置の負圧室
に与えることができ、倍力装置の受圧部の受圧面積を特
別拡張しなくとも所望の倍力比を得ることができる。ま
た、空気エゼクタの駆動のために特別な流体ポンプを設
ける必要もないから構成が簡単で負圧源装置を安価に提
供することができ、その上、可動部が無し・ので故障が
少ない。さらに、空気エゼクタの空気入口はこれを前記
吸入系のエアクリーナに接続したので、空気エゼクタに
は特別なエアクリーナを装着しなくとも清浄な外気を吸
入させることができ、構成が一層簡単になると共に塵埃
等による目詰りを防止して長期間に至り正常な作動を得
ることができる。As described above, according to the present invention, the air outlet of the air ejector is connected to the negative pressure take-off hole provided in the intake system downstream of the throttle valve of the internal combustion engine, and the negative pressure booster is connected to the reduced pressure chamber of the air ejector. Since the negative pressure chamber is connected, the air ejector is operated by the engine's suction negative pressure, which is generated in the reduced pressure chamber of the air ejector.
A suction negative pressure higher than the engine suction negative pressure can be applied to the negative pressure chamber of the booster, and the desired boost ratio can be obtained without special expansion of the pressure receiving area of the pressure receiving part of the booster. . Further, since there is no need to provide a special fluid pump to drive the air ejector, the configuration is simple and the negative pressure source device can be provided at low cost.Furthermore, since there are no moving parts, there are fewer failures. Furthermore, since the air inlet of the air ejector is connected to the air cleaner of the intake system, clean outside air can be sucked into the air ejector without the need for a special air cleaner. It is possible to prevent clogging caused by the like and obtain normal operation for a long period of time.
第１図は本発明装置の一実施例を示す概略側面図、第２
図はその要部である空気エゼクタ周りの拡大縦断側面図
である。
Ａｃ・・・エアクリーナ、Ｅ・・・内燃機関、Ｓ・・・
負圧式倍力装置
３・・・負圧室、４・・・吸入系、７・・・絞弁、８・
・・負圧取出孔、１０・・・空気エゼクタ、１２・・・
空気入口、１３・・・空気出口、１４・・・吸引口、１
５・・・減圧室、１６・・・出口室、１７・・・ディフ
ューザ特許出願人 日信工業株式会社
同 本田技研工業株式会社FIG. 1 is a schematic side view showing one embodiment of the device of the present invention, and FIG.
The figure is an enlarged longitudinal sectional side view of the main part of the air ejector. Ac...Air cleaner, E...Internal combustion engine, S...
Negative pressure booster 3... Negative pressure chamber, 4... Suction system, 7... Throttle valve, 8...
... Negative pressure outlet, 10... Air ejector, 12...
Air inlet, 13... Air outlet, 14... Suction port, 1
5... Decompression chamber, 16... Exit chamber, 17... Diffuser Patent applicant Nissin Kogyo Co., Ltd. Honda Motor Co., Ltd.
Claims (1)
ゼクタの空気入口を連通ずると共に、該絞弁より下流の
該吸入系に設けた負圧取出孔に該空気エゼクタの空気出
口を接続し、該空気エゼクタの減圧室には負圧倍力装置
の負圧室を接続してなる、車両用負圧式倍力装置の負圧
源装置。communicating the air inlet of the air ejector with an air cleaner of the intake system equipped with a throttle valve of the internal combustion engine, and connecting the air outlet of the air ejector to a negative pressure outlet provided in the intake system downstream of the throttle valve; A negative pressure source device for a negative pressure type booster for a vehicle, wherein a negative pressure chamber of a negative pressure booster is connected to a reduced pressure chamber of the air ejector.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13844383A JPS6029364A (en) | 1983-07-28 | 1983-07-28 | Negative-pressure source device of negative-pressure type booster for car |
| AU18766/83A AU545569B2 (en) | 1982-09-16 | 1983-09-06 | Vacuum source device |
| GB08324507A GB2129516B (en) | 1982-09-16 | 1983-09-13 | Vacuum source arrangement for vacuum booster for vehicles |
| FR8314686A FR2533186B1 (en) | 1982-09-16 | 1983-09-15 | VACUUM SUPPLY DEVICE DECOMPRESSOR FOR VEHICLES |
| DE19833333566 DE3333566A1 (en) | 1982-09-16 | 1983-09-16 | VACUUM SOURCE DEVICE OF A VACUUM AMPLIFIER FOR VEHICLES |
| US06/533,023 US4554786A (en) | 1982-09-16 | 1983-09-16 | Vacuum source device for vacuum booster for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13844383A JPS6029364A (en) | 1983-07-28 | 1983-07-28 | Negative-pressure source device of negative-pressure type booster for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6029364A true JPS6029364A (en) | 1985-02-14 |
Family
ID=15222112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13844383A Pending JPS6029364A (en) | 1982-09-16 | 1983-07-28 | Negative-pressure source device of negative-pressure type booster for car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029364A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62214245A (en) * | 1986-03-12 | 1987-09-21 | Nissin Kogyo Kk | Negative pressure source device for negative pressure booster |
| JPS62214244A (en) * | 1986-03-12 | 1987-09-21 | Nissin Kogyo Kk | Negative pressure source device for negative pressure booster |
| CN103895633A (en) * | 2012-12-27 | 2014-07-02 | 爱三工业株式会社 | Brake system |
-
1983
- 1983-07-28 JP JP13844383A patent/JPS6029364A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62214245A (en) * | 1986-03-12 | 1987-09-21 | Nissin Kogyo Kk | Negative pressure source device for negative pressure booster |
| JPS62214244A (en) * | 1986-03-12 | 1987-09-21 | Nissin Kogyo Kk | Negative pressure source device for negative pressure booster |
| JPH0629016B2 (en) * | 1986-03-12 | 1994-04-20 | 日信工業株式会社 | Negative pressure booster negative pressure source device |
| CN103895633A (en) * | 2012-12-27 | 2014-07-02 | 爱三工业株式会社 | Brake system |
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