JPS5953265A - Negative-pressure source apparatus of negative-pressure type booster for car - Google Patents
Negative-pressure source apparatus of negative-pressure type booster for carInfo
- Publication number
- JPS5953265A JPS5953265A JP16298482A JP16298482A JPS5953265A JP S5953265 A JPS5953265 A JP S5953265A JP 16298482 A JP16298482 A JP 16298482A JP 16298482 A JP16298482 A JP 16298482A JP S5953265 A JPS5953265 A JP S5953265A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- negative
- pressure
- passage
- vacuum pump
- 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
- 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
シリンダ等を倍力操作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 for boosting a brake mask cylinder or the like in an automobile or other vehicle.
従来、自動車用負圧式倍力装置の負圧源装置として、倍
力装置の負圧室を、エンジンの絞弁より下流の吸入系に
設けた負圧取出孔に負圧通路を介して接続し、この負圧
通路に、前記負圧室から前記負圧取出孔への負圧の逆伝
達を阻止する逆止弁を挿入し、エンジンの吸入負圧を、
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。ところで、自動車に搭載されたエン
ジンの形式、その付属機器の種類によっては（例えば、
エンジンが２サイクル式の場合、多連式気化器を備える
場合、あるいは自動変速装置付の場合）、エンジンの使
用負圧が非常に低く、一般には一５００ｍｍＨ！１程度
あるのに対し、−３００−４００ｍｍ ｒｔ 、ｑ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
、倍力装置の受圧部を大径に構成して所定の倍力比を確
保しているが、そうすることは倍力装置の大型化を招き
、狭いエンジンルーム等への設置を困難にする問題があ
る。Conventionally, as a negative pressure source device for a negative pressure booster for an automobile, the negative pressure chamber of the booster was connected to a negative pressure outlet hole provided in the intake system downstream of the engine throttle valve via a negative pressure passage. , a check valve that prevents reverse transmission of negative pressure from the negative pressure chamber to the negative pressure outlet hole is inserted into this negative pressure passage, and the intake negative pressure of the engine is
It is known that the power of a booster is stored in its negative pressure chamber. By the way, depending on the type of engine installed in the car and the type of attached equipment (for example,
If the engine is a two-cycle type, equipped with a multiple carburetor, or equipped with an automatic transmission), the negative pressure used by the engine is very low, typically -500 mmH! 1, whereas in some cases only about -300-400 mm rt,q can be obtained. In such cases, conventionally, the pressure-receiving part of the booster is configured to have a large diameter to ensure a predetermined boost ratio, but doing so leads to an increase in the size of the booster, making it difficult to fit into narrow engine rooms, etc. There are problems that make installation difficult.
本発明は上記に鑑み提案されたもので、エンジンの吸入
負圧が低い場合でも、負圧式倍力装置に、その作動に必
要な高負圧を供給し得ろようにした、簡？１′Ｉ−有効
な負圧源装置を提供することを目的とし、その特徴は、
負圧式倍力装置の負圧室を、エンジンの絞弁より下流の
吸入系に設げた負圧取出孔に負圧通路を介して接続し、
この負圧通路に、前記負圧室から前記負圧取出孔への負
圧の逆伝達を阻ＩＩ−する逆止弁を挿入し、この逆止弁
を迂回する側路を前記負圧通路に接続すると共に該側路
に、該側路を通して前記負圧通路の下流側を減圧し得る
真空ポンプを介装し、この真空ポンプの吸引口側と排出
口側との間の圧力差が所定の圧力差範囲にあるときのみ
該ポンプに作動信号を与えろ圧力差検知装置を設けたと
ころにある。The present invention has been proposed in view of the above, and is a simple system capable of supplying a negative pressure booster with the high negative pressure necessary for its operation even when the intake negative pressure of the engine is low. 1'I - The purpose is to provide an effective negative pressure source device, the characteristics of which are:
Connecting the negative pressure chamber of the negative pressure booster to a negative pressure outlet provided in the intake system downstream of the throttle valve of the engine via a negative pressure passage,
A check valve that prevents reverse transmission of negative pressure from the negative pressure chamber to the negative pressure outlet hole is inserted into this negative pressure passage, and a side passage that bypasses this check valve is inserted into the negative pressure passage. A vacuum pump capable of reducing the pressure on the downstream side of the negative pressure passage through the side passage is connected to the side passage, and a pressure difference between the suction port side and the discharge port side of the vacuum pump is maintained at a predetermined level. A pressure difference detection device is provided to give an activation signal to the pump only when the pressure difference is within the range.
以下、図面により本発明の一実施例について説明すると
、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、そのブースタシェル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は自動車のエンジンでその吸入
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は負圧通路を９
を介して前記負圧室３に接続されろ。Hereinafter, one embodiment of the present invention will be described with reference to the drawings. S is a known negative pressure booster for operating a brake mask cylinder of an automobile, and a booster shell 1 is provided with negative pressure by a booster piston 2 with a diaphragm. A chamber 3 is defined. Reference numeral E denotes an automobile engine, and its intake system 4 is composed of an intake manifold 5 and a carburetor 6 mounted at its upstream end, and the carburetor 6 has a throttle valve 7 as is conventionally known. A negative pressure outlet hole 8 is provided in the suction system 4 downstream of this throttle valve 7, and this negative pressure outlet hole 8 connects the negative pressure passage to 9.
It is connected to the negative pressure chamber 3 via.
上記負圧通路９には、その上流側（負圧取出孔８側）か
ら第１および第２逆止弁１０．１１が順次挿入され、こ
れら逆止弁１０．１１はいずれも負圧室３から負圧取出
孔８への負圧の逆伝達を阻止するように構成されている
。First and second check valves 10.11 are sequentially inserted into the negative pressure passage 9 from the upstream side (negative pressure outlet hole 8 side), and these check valves 10.11 are connected to the negative pressure chamber 3. It is configured to prevent reverse transmission of negative pressure from the negative pressure outlet hole 8 to the negative pressure outlet hole 8.
また、上記負圧通路９には第１逆止弁１０を迂回する側
路１２が接続され、この側路１２に駆動モータ付真空ポ
ンプ１３が介装される。この真空ポンプ１３は、その作
動時に側路１２を通して負圧通路９の下流側を減圧し得
るよう構成されている。Further, a side passage 12 that bypasses the first check valve 10 is connected to the negative pressure passage 9, and a vacuum pump 13 with a drive motor is interposed in this side passage 12. This vacuum pump 13 is configured to reduce the pressure on the downstream side of the negative pressure passage 9 through the side passage 12 during operation.
この真空ポンプ１３の駆動モータと電源１４との間を結
ぶ電気回路１５には主スィッチ１６及び圧力差検知スイ
ッチ１γが直列に介挿される。圧力差検知スイッチ１７
は第１及び第２圧力検知管１８、．１８□を有し、第１
圧力検知管１８１は真空ポンプ１３の吸引口１３α側の
側路１２または第１逆止弁１０より下流の負圧通路９に
接続され、また第２圧力検知管１８２は真空ポンプ１３
の排出口１３ｈ側の側路１２または第１逆止弁１０５−
より上流の負圧通路９に接続される。而して、圧力差検
知スイッチ１７は真空ポンプ１３の吸引口１３ａ側と排
出口１３ｈ１１１１との圧力差が所定の圧力差範囲にあ
るときのみ閉じるようになっており、上記圧力差範囲は
、図示例では、例えば真空ポンプ１３が最大負圧−３０
０ｍｍ１Ｊ（ｌをつくり得る能力を有する場合、０ない
し−３００７４ｙ、Ｉｆ ｇとされろ。A main switch 16 and a pressure difference detection switch 1γ are inserted in series in an electric circuit 15 connecting the drive motor of the vacuum pump 13 and the power source 14. Pressure difference detection switch 17
are the first and second pressure sensing tubes 18, . 18□, the first
The pressure detection tube 181 is connected to the side passage 12 on the side of the suction port 13α of the vacuum pump 13 or to the negative pressure passage 9 downstream from the first check valve 10, and the second pressure detection tube 182 is connected to the side passage 12 on the suction port 13α side of the vacuum pump 13
It is connected to the negative pressure passage 9 upstream of the side passage 12 on the side of the discharge port 13h or the first check valve 105-. The pressure difference detection switch 17 is configured to close only when the pressure difference between the suction port 13a side and the discharge port 13h1111 of the vacuum pump 13 is within a predetermined pressure difference range. In the example shown, for example, the vacuum pump 13 has a maximum negative pressure of -30
If it has the ability to create 0 mm 1 J (l), it should be 0 to -30074 y, If g.
主スィッチ１６は車両のイグニションスイッチ（図示せ
ず）に連動して開閉されるようになっている。The main switch 16 is opened and closed in conjunction with an ignition switch (not shown) of the vehicle.
次にこの実施例の作用を説明する。いま、エンジンＥが
作動され、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
れて、第１および第２逆止弁ｉｏ、１ｉを開きなから負
圧通路９を経て倍力装置Ｓの負圧室３に蓄圧され、負圧
室３の負圧はエンジンＥの吸入負圧の値まで速やかに高
められ ６−
る。Next, the operation of this embodiment will be explained. Now, when the engine E is operated and a 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 take-off hole 8 and is passed through the first and second check valves. io and 1i are opened, the pressure is accumulated in the negative pressure chamber 3 of the booster S through the negative pressure passage 9, and the negative pressure in the negative pressure chamber 3 is quickly increased to the value of the intake negative pressure of the engine E.6- .
このようにして、エンジンＥの吸入負圧と負圧室３の負
圧とが平衡状態になると、第１逆止弁１０の前後の圧力
差、即ち真空ポンプ１３の吸引口１３ａ側と排出口１３
ｂ側との圧力差が殆ど無くなるので、圧力差検知スイッ
チ１７はその状態を検知して閉じ、電気回路１５を閉路
（主スィッチ１６はエンジンＥの始動時読に閉じられて
いる。）させる。したがって、真空ポンプ１３は作動さ
れるので、側路１２を通して、第】逆止弁１０より下流
の負圧通路９を減圧し、負圧室３の負圧を高める。In this way, when the suction negative pressure of the engine E and the negative pressure of the negative pressure chamber 3 reach an equilibrium state, the pressure difference before and after the first check valve 10, that is, the pressure difference between the suction port 13a side of the vacuum pump 13 and the discharge port 13
Since the pressure difference with side b is almost eliminated, the pressure difference detection switch 17 detects this state and closes, closing the electric circuit 15 (the main switch 16 is closed when the engine E is started). Therefore, since the vacuum pump 13 is operated, the pressure in the negative pressure passage 9 downstream of the first check valve 10 is reduced through the side passage 12, and the negative pressure in the negative pressure chamber 3 is increased.
この間、第１逆止弁１０はその前後の圧力差により閉成
状態を保ち真空ポンプ１３により生成される負圧が負圧
通路９を負圧取出孔８側へ逆伝達することを阻止する。During this time, the first check valve 10 is kept closed due to the pressure difference before and after it, and prevents the negative pressure generated by the vacuum pump 13 from being reversely transmitted through the negative pressure passage 9 to the negative pressure outlet hole 8 side.
真空ポンプ１３の作動により、その吸引口１３ａ側と排
出口１３Ａ側との圧力差が−３００ｍｍＨｙとなれば、
圧力差検知スイッチ１７が開くので、真空ポンプ１３の
作動は停止する。真空ポンプ１３の停止に伴い、その吸
引口１３ａ側の負圧が低下すれば、第２逆止弁１１がそ
の前後の圧力差により閉成状態となるから、負圧室３の
負圧が真空ポンプ１３側へ逆伝達することはない。If the pressure difference between the suction port 13a side and the discharge port 13A side becomes -300 mmHy due to the operation of the vacuum pump 13,
Since the pressure difference detection switch 17 is opened, the operation of the vacuum pump 13 is stopped. When the vacuum pump 13 is stopped and the negative pressure on the suction port 13a side decreases, the second check valve 11 is closed due to the pressure difference before and after it, so the negative pressure in the negative pressure chamber 3 becomes a vacuum. There is no reverse transmission to the pump 13 side.
かくして真空ポンプ１３は、第１逆止弁１００前後に一
３ｏｏｍｍＪＩｇの圧力差を与えるから、例えばエンジ
ンＥの吸入負圧が−４ｃ） Ｏｍｉｌ 、’７であると
すれば、倍力装置Ｓの負圧室３の負圧は上記負圧の相、
即ち一７ｏｏｍｍＨｙとなる。In this way, the vacuum pump 13 gives a pressure difference of -3 oomm JIg before and after the first check valve 100. For example, if the suction negative pressure of the engine E is -4c) Omil, '7, then the negative pressure of the booster S is The negative pressure in the pressure chamber 3 is a phase of the above negative pressure,
That is, it becomes -7oommHy.
尚、第２逆止弁１１は、これを側路１２に設けても同様
の作用を得ることができ、また真空ポンプ１３自体が逆
止弁機能を持つ場合には、これを省略することもできる
。Note that the second check valve 11 can provide the same effect even if it is provided in the side passage 12, and if the vacuum pump 13 itself has a check valve function, it may be omitted. can.
以上のように本発明によれば、負圧式倍力装置の負圧室
を、エンジンの絞弁より下流の吸入系に設けた負圧取出
孔に負圧通路を介して接続し、この負圧通路に、前記負
圧室から前記負圧取出孔への負圧の逆伝達を阻止する逆
止弁を挿入し、この逆止弁を迂回する側路を前記負圧通
路に接続すると共に該側路に、該側路を通して前記負圧
通路の下流側を減圧し得る真空ポンプを介装したので、
真空ポンプの作動によりエンジンの吸入負圧以上の高い
負圧を倍力装置の負圧室に蓄えろことができ、倍力装置
の受圧部を特別大径に構成せずども所望の倍力比を得る
ことができる。As described above, according to the present invention, the negative pressure chamber of the negative pressure booster is connected to the negative pressure outlet provided in the intake system downstream of the throttle valve of the engine via the negative pressure passage, and the negative pressure A check valve that prevents reverse transmission of negative pressure from the negative pressure chamber to the negative pressure outlet hole is inserted into the passage, and a side passage bypassing the check valve is connected to the negative pressure passage, and a side passage bypassing the check valve is connected to the negative pressure passage. Since a vacuum pump capable of reducing the pressure on the downstream side of the negative pressure passage through the side passage is installed in the passage,
By operating the vacuum pump, a high negative pressure higher than the engine suction negative pressure can be stored in the negative pressure chamber of the booster, and the desired boost ratio can be achieved without making the pressure receiving part of the booster particularly large in diameter. can be obtained.
また前記真空ポンプは、前記逆止弁の前後の圧力差を高
めるだけのポンプ能力を持つだけでよいので、比較的小
容量のもので足り、したがってエンジンルーム等の狭小
な場所に容易に設置でき、しかも前記側路の配管により
倍力装置の位置にも左右されずに設置できる。Furthermore, since the vacuum pump only needs to have enough pumping capacity to increase the pressure difference before and after the check valve, a relatively small-capacity one is sufficient, and therefore it can be easily installed in a narrow place such as an engine room. Furthermore, the side passage piping allows installation regardless of the position of the booster.
さらに、前記真空ポンプの吸引口側と排出口側 ９−
との間の圧力差が所定の圧力差範囲にあるときのみ該ポ
ンプに作動信号を与える圧力差検知装置を設けたので、
エンジンの吸入負圧がどのような値を取ろうとも、その
吸気負圧の値を基準として真空ポンプの作動を制御する
ことができ、したがって例えば倍力装置の負圧室の負圧
がエンジンの吸入負圧の値に到達するまでの間及び前記
逆止弁の前後の圧力差が真空ポンプの能力値に到達した
ときには真空ポンプを休止させて、その寿命を延ばすと
共に、真空ポンプのための動力の無用な消費を防止する
ことができる。Furthermore, since a pressure difference detection device is provided that provides an activation signal to the pump only when the pressure difference between the suction port side and the discharge port side of the vacuum pump is within a predetermined pressure difference range,
No matter what value the engine's suction negative pressure takes, the operation of the vacuum pump can be controlled based on the value of the suction negative pressure. Therefore, for example, the negative pressure in the negative pressure chamber of a booster will Until the suction negative pressure value is reached, and when the pressure difference before and after the check valve reaches the capacity value of the vacuum pump, the vacuum pump is stopped to extend its life and reduce the power for the vacuum pump. It is possible to prevent unnecessary consumption of
図面は本発明装置の一実施例を示す概略側面図である。
Ｅ・・・エンジン、Ｓ・・・負圧式倍力装置、１・・・
ブースタシェル、３・・・負圧室、４・・・吸入系、７
・・・絞弁、８・・・負圧取出孔、９・・・負圧通路、
１０・・・逆止弁と１０−
しての第１逆止弁、１２・・・側路、１３・・・真空ポ
ンプ、１３ａ・・・吸引口、１３１４・・・排出口、１
７・・・圧力差検知装置としての圧力差検知スイッチ特
許出願人 日信工業株式会社
１１−The drawing is a schematic side view showing one embodiment of the device of the present invention. E...Engine, S...Negative pressure booster, 1...
Booster shell, 3... Negative pressure chamber, 4... Suction system, 7
... Throttle valve, 8... Negative pressure outlet, 9... Negative pressure passage,
DESCRIPTION OF SYMBOLS 10... Check valve and first check valve as 10-, 12... Side passage, 13... Vacuum pump, 13a... Suction port, 1314... Discharge port, 1
7... Pressure difference detection switch as a pressure difference detection device Patent applicant Nissin Kogyo Co., Ltd. 11-
Claims (1)
吸入系に設けた負圧取出孔に負圧通路を介して接続し、
この負圧通路に、前記負圧室から前記負圧取出孔への負
圧の逆伝達を阻止する逆止弁を挿入し、この逆止弁を迂
回する側路を前記負圧通路に接続すると共に該側路に、
該側路を通して前記負圧通路の下流側を減圧し得る真空
ポンプを介装し、この真空ポンプの吸引口側と排出口側
との間の圧力差が所定の圧力差範囲にあるときのみ該ポ
ンプに作動信号を与える圧力差検知装置を設けてなる、
車両用負圧式倍力装置の負圧源装置。Connecting the negative pressure chamber of the negative pressure booster to a negative pressure outlet provided in the intake system downstream of the throttle valve of the engine via a negative pressure passage,
A check valve that prevents reverse transmission of negative pressure from the negative pressure chamber to the negative pressure outlet hole is inserted into this negative pressure passage, and a side passage that bypasses this check valve is connected to the negative pressure passage. and to the side road,
A vacuum pump capable of reducing the pressure on the downstream side of the negative pressure passage through the side passage is interposed, and the vacuum pump is applied only when the pressure difference between the suction port side and the discharge port side of the vacuum pump is within a predetermined pressure difference range. It is equipped with a pressure difference detection device that provides an operating signal to the pump.
Negative pressure source device for negative pressure booster for vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16298482A JPS5953265A (en) | 1982-09-18 | 1982-09-18 | Negative-pressure source apparatus of negative-pressure type booster for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16298482A JPS5953265A (en) | 1982-09-18 | 1982-09-18 | Negative-pressure source apparatus of negative-pressure type booster for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5953265A true JPS5953265A (en) | 1984-03-27 |
Family
ID=15764999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16298482A Pending JPS5953265A (en) | 1982-09-18 | 1982-09-18 | Negative-pressure source apparatus of negative-pressure type booster for car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953265A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375546A (en) * | 1986-09-18 | 1988-04-05 | Soaa:Kk | Electronic hydroscope |
| JPS63149553A (en) * | 1986-12-12 | 1988-06-22 | Nippon Mining Co Ltd | Electronic hygrometer |
| JP2005255072A (en) * | 2004-03-15 | 2005-09-22 | Daihatsu Motor Co Ltd | Control method of negative pressure to pneumatic assistor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222174A (en) * | 1975-08-06 | 1977-02-19 | Seisui Kogyo Kk | Filter apparatus |
-
1982
- 1982-09-18 JP JP16298482A patent/JPS5953265A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222174A (en) * | 1975-08-06 | 1977-02-19 | Seisui Kogyo Kk | Filter apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375546A (en) * | 1986-09-18 | 1988-04-05 | Soaa:Kk | Electronic hydroscope |
| JPS63149553A (en) * | 1986-12-12 | 1988-06-22 | Nippon Mining Co Ltd | Electronic hygrometer |
| JP2005255072A (en) * | 2004-03-15 | 2005-09-22 | Daihatsu Motor Co Ltd | Control method of negative pressure to pneumatic assistor |
| JP4565863B2 (en) * | 2004-03-15 | 2010-10-20 | ダイハツ工業株式会社 | Negative pressure control method for pneumatic booster |
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