JPS6159077A - Pressure control valve - Google Patents
Pressure control valveInfo
- Publication number
- JPS6159077A JPS6159077A JP59181566A JP18156684A JPS6159077A JP S6159077 A JPS6159077 A JP S6159077A JP 59181566 A JP59181566 A JP 59181566A JP 18156684 A JP18156684 A JP 18156684A JP S6159077 A JPS6159077 A JP S6159077A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- diaphragm
- stator core
- valve
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0668—Sliding valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/55—Systems for actuating EGR valves using vacuum actuators
- F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
- F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は圧力制御弁に関するものであり、ディーゼルエ
ンジン車のＥＧＲ（排気ガス再循環）制御に用いる圧力
制御弁として用いて有効である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure control valve, and is effective for use as a pressure control valve used in EGR (exhaust gas recirculation) control of diesel engine vehicles.
従来の圧力制御弁を示すものとして、例えば実開昭５８
−２４５７５号公報に記載されるものがある。この様な
圧力制御弁では上記公報の第３図及び第５図にも示され
る様に、ソレノイドコイルに供給する電流値を大きくす
ると出力負圧も大きくなるという作動を奏する。For example, as an example of a conventional pressure control valve,
There is one described in Japanese Patent No.-24575. As shown in FIGS. 3 and 5 of the above-mentioned publication, such a pressure control valve operates in such a way that when the current value supplied to the solenoid coil is increased, the output negative pressure is also increased.
しかしながら、上述のような圧力制御弁を実際に車両に
搭載した場合、必要となる出力負圧は高出力側域である
。したがって、ソレノイドコイルには常時、大電流を供
給しなければならず、ソレノイドコイルの発熱量が大き
くなって耐久性が劣化するという問題点がある。However, when a pressure control valve as described above is actually mounted on a vehicle, the required output negative pressure is in the high output side region. Therefore, a large current must be constantly supplied to the solenoid coil, which causes a problem in that the amount of heat generated by the solenoid coil increases and its durability deteriorates.
上記問題点を解決するため、磁気回路を形成するための
ステータコアと、このステータコアに所定間隙を介して
対向配置されるムービングコアと、このステータコア及
びムービングコアの外周に巻装されるソレノイドコイル
と、カバーによってｔ央持され一側面側にダイヤフラム
室を、他側面側に大気室を形成するダイヤフラムと、前
記ダイヤフラム室に負圧を導入するための入力ポートと
、前記ダイヤフラム室内の負圧を取り出すための出力ポ
ートと、前記大気室に大気を導入するための大気ポート
と、前記入力ポートの開閉を行う弁体と、前記ダイヤフ
ラムに担持され前記ムービングコアの動きが伝達される
弁箱体とを備え、前記弁箱体にば前記ムービングコアが
前記ステータコアより離れる方向のみに前記弁体に係合
して前記弁体を開弁させる肩部が形成されており、この
肩部と前記弁体との当接、）Ｗ離によって前記大気室と
前記ダイヤフラム室とが連通、遮ＩＵｒされる圧力制御
弁とした。In order to solve the above problems, a stator core for forming a magnetic circuit, a moving core disposed opposite to the stator core with a predetermined gap therebetween, a solenoid coil wound around the outer periphery of the stator core and the moving core, A diaphragm supported in the center by a cover and forming a diaphragm chamber on one side and an atmospheric chamber on the other side, an input port for introducing negative pressure into the diaphragm chamber, and an input port for taking out the negative pressure in the diaphragm chamber. an atmospheric port for introducing atmospheric air into the atmospheric chamber, a valve body that opens and closes the input port, and a valve body supported by the diaphragm and to which movement of the moving core is transmitted. The valve body is formed with a shoulder portion that engages with the valve body to open the valve body only in a direction in which the moving core leaves the stator core, and a shoulder portion is formed in the valve body to open the valve body. The pressure control valve is such that the atmospheric chamber and the diaphragm chamber are communicated with each other by contact and separation by W, and are interrupted by IUr.
次に本発明の実施例を図に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.
第１図は本実施例の断面図である。圧力制御弁１００の
外形を形成するためのカバー１には、図示しない負圧源
からの負圧を圧力制御弁１００内に導く入力ポート３と
、大気を導くため大気に向けて開口する大気ポート７と
、圧力制御弁１００によって調圧された圧力を出力する
ための出力ポート５とが形成されている。このカバー１
の内方にはカバー１の内壁に密接するように第２カバー
９が配されており、この第２カバー９には前記大気ポー
ト７と連通ずる大気連通路１１が穿設されている。FIG. 1 is a sectional view of this embodiment. The cover 1 for forming the external shape of the pressure control valve 100 includes an input port 3 for guiding negative pressure from a negative pressure source (not shown) into the pressure control valve 100, and an atmospheric port opening toward the atmosphere for guiding the atmosphere. 7 and an output port 5 for outputting the pressure regulated by the pressure control valve 100. This cover 1
A second cover 9 is disposed inside the cover 1 so as to be in close contact with the inner wall of the cover 1, and the second cover 9 is provided with an atmospheric communication passage 11 that communicates with the atmospheric port 7.
１３はゴム等の可撓性を有する材質からなるダイヤフラ
ムで、その外周端は前記カバー１と前記第２カバー９と
によって挟持され、内周端は弁作動をなすための弁箱体
１５に固定されている。このダイヤフラム１３によって
カバー１内は大気室Ｈと、ダイヤフラム室Ｍに区画され
ており、前記大気ポート７は大気室Ｈに、前記入力ポー
ト３、出力ポート５はダイヤラム室Ｍに各々開口してい
る。前記入力ポート３の内側開口端には弁座の働きをな
す円筒状のシート部材１７が嵌入されており、このシー
ト部材１７の先端にはこのシート部材１７に当接して弁
作用をなす弁体１９が位置している。前記弁箱体１５は
前記シート部材１７の先端部周囲を所定間隔を介して覆
っており、前記弁体１９ば前記弁箱体１５内に収納され
ている。Reference numeral 13 denotes a diaphragm made of a flexible material such as rubber, whose outer peripheral end is held between the cover 1 and the second cover 9, and whose inner peripheral end is fixed to the valve body 15 for valve operation. has been done. The interior of the cover 1 is divided into an atmospheric chamber H and a diaphragm chamber M by the diaphragm 13, and the atmospheric port 7 opens into the atmospheric chamber H, and the input port 3 and output port 5 open into the diaphragm chamber M. . A cylindrical seat member 17 that functions as a valve seat is fitted into the inner open end of the input port 3, and a valve body that comes into contact with the seat member 17 and performs a valve action is fitted at the tip of this seat member 17. 19 is located. The valve body 15 covers the tip of the seat member 17 at a predetermined interval, and the valve body 19 is housed within the valve body 15.
そしてこの弁体１９と弁箱体１５との間には第１スプリ
ング２１が配されており、弁体１９をシート部材１７側
に付勢している。尚、前記弁箱体１５の側壁には、その
内外を連通ずる連通孔２３が穿設されている。 ２４
はスプリング受は部材で、このスプリング受は部材２４
と前記弁箱体１５との間には第２スプリング２６が配さ
れ、前記弁箱体１５を第１図中上方に付勢している。尚
、前記スプリング受は部材２４は、前記カバー１に螺着
されたねじ部２４ａを有しており、このねじ部２４ａを
螺進させることによってスプリング受は部材２４の位置
を調整する。A first spring 21 is disposed between the valve body 19 and the valve body 15, and urges the valve body 19 toward the seat member 17. Incidentally, a communication hole 23 is bored in the side wall of the valve body 15 to communicate the inside and outside thereof. 24
The spring receiver is a member, and this spring receiver is a member 24.
A second spring 26 is disposed between the valve body 15 and the valve body 15, and urges the valve body 15 upward in FIG. The spring receiver member 24 has a threaded portion 24a screwed onto the cover 1, and the position of the spring receiver member 24 is adjusted by threading this threaded portion 24a.
前記第２カバー９の図中上方にば０リング２８を介して
ステータコア３０が配されており、さらに、このステー
タコア３０に所定間隔を介してムービングコア３２が対
向配置されている。このムービングコア３２にはシャフ
ト３１ｔが止め具３６によって連結されており、このシ
ャフト３４は前記ステータコア３０の中心部を貫通して
前記弁箱体１５に当接している。前記ムービングコア３
２と前記ステータコア３０との間には、両者の間１’ｌ
’＋１を拡げる方向に付勢する第３スプリング３８が配
されている。尚、前記ムービングコア３２及びステータ
コア３０は磁性材料よりなり、前記ムービングコア３２
のステータコア３０に対向する面には両者の引っ付きを
防止するために非磁性シート４０が貼付されている。A stator core 30 is disposed above the second cover 9 in the figure via an O-ring 28, and a moving core 32 is disposed opposite to the stator core 30 at a predetermined interval. A shaft 31t is connected to the moving core 32 by a stopper 36, and the shaft 34 passes through the center of the stator core 30 and comes into contact with the valve body 15. The moving core 3
2 and the stator core 30, there is a gap 1'l between them.
A third spring 38 is disposed that biases in the direction of expanding '+1. The moving core 32 and the stator core 30 are made of magnetic material, and the moving core 32 and the stator core 30 are made of magnetic material.
A non-magnetic sheet 40 is attached to the surface facing the stator core 30 to prevent the two from sticking together.
前記ステータコア３０及びムービングコア３２の外周に
は非磁性体よりなるボビン４２が配されており、このボ
ビン４２の外周にはソレノイドコイル４４がを装されて
いる。また、このソレノイトコイル４４を包むようにし
てヨーク４６が配されている。尚、前記ボビン４２とス
テータコア３０との間には○リング４８が介在しており
、前記ボビン４２にはソレノイドコイル４４に電流を供
給するリード線５０が設りられている。A bobbin 42 made of a non-magnetic material is arranged around the outer periphery of the stator core 30 and the moving core 32, and a solenoid coil 44 is installed around the outer periphery of the bobbin 42. Further, a yoke 46 is arranged so as to surround the solenoid coil 44. Note that a circle ring 48 is interposed between the bobbin 42 and the stator core 30, and a lead wire 50 for supplying current to the solenoid coil 44 is provided on the bobbin 42.
第２図は前記弁箱体１５と前記弁体１９の拡大断面図で
ある。弁体１９ば断面凸字形状をなしており、フランジ
部１９ａを有する。弁箱体１５は側壁部１５１と天井部
１５２からなり、側壁部Ｉ５２にば前記弁体１９のフラ
ンジ部１９ａと係合するための肩部１５ａが形成されて
いる。さらに側壁部１５１に凹部１５ｂが形成され、こ
の凹部１５ｂに前記ダイヤフラム１３の内周端が固定さ
れている。FIG. 2 is an enlarged sectional view of the valve body 15 and the valve body 19. The valve body 19 has a convex cross section and has a flange portion 19a. The valve body 15 consists of a side wall portion 151 and a ceiling portion 152, and a shoulder portion 15a for engaging with the flange portion 19a of the valve body 19 is formed in the side wall portion I52. Further, a recess 15b is formed in the side wall portion 151, and the inner peripheral end of the diaphragm 13 is fixed to this recess 15b.
次に本実施例の作動を第１図及び第３図に基づいて説明
する。Next, the operation of this embodiment will be explained based on FIGS. 1 and 3.
第３図は作動を説明するための主要部断面図である。ま
ず、ソレノ・Ｃトコイル４４に電流を供給すると、ムー
ビングコア３２、ステータコア３０、ヨーク４６を順次
通る磁力が発生し、ムービングコア３２がステータコア
３０が吸引される。それに伴ってシャフト３４が弁箱体
１５を図中下方に押し下げ、弁体１９のフランジｕＢ１
９ａと弁箱体１５の肩部ｉ５ａとの当接がＩ’ｒＥ１ｍ
する。すると、大気ポート７、大気連通路１１、連通孔
２３を通ってきた大気が、第３図＋ａｌ中矢印Ｒで示ず
様に、シート部材１７と弁箱体１５との間隙を通り出力
ポート５より出力される。この時入力ポート３は弁体１
９がシート部材１７に当接することにより閉じられてい
る。FIG. 3 is a sectional view of the main parts for explaining the operation. First, when a current is supplied to the solenoid coil 44, a magnetic force is generated that sequentially passes through the moving core 32, the stator core 30, and the yoke 46, and the moving core 32 attracts the stator core 30. Accordingly, the shaft 34 pushes the valve body 15 downward in the figure, and the flange uB1 of the valve body 19
The contact between 9a and the shoulder i5a of the valve body 15 is I'rE1m.
do. Then, the atmosphere that has passed through the atmosphere port 7, the atmosphere communication path 11, and the communication hole 23 passes through the gap between the seat member 17 and the valve body 15 and reaches the output port 5, as shown by the arrow R in FIG. It is output from At this time, input port 3 is valve body 1
9 is closed by contacting the sheet member 17.
その（麦ダイヤフラム１３の出力ポート側空間の圧力が
、導入された大気よりしだいに上昇し、ダイヤフラム１
３を図中上方に押し上げる力と第２スプリング２６の付
勢力との和が、ムービングコア３２の吸引力と平衡状態
になる。すると弁箱体１５が図中上方に移動し、第３図
（ｂｌに示す様にフランジ部１９ａと肩部１５ａが当接
する。従って大気の導入は遮断される。The pressure in the space on the output port side of the diaphragm 13 gradually rises from the introduced atmosphere, and the diaphragm 1
The sum of the force pushing up the moving core 3 upward in the figure and the biasing force of the second spring 26 is in equilibrium with the suction force of the moving core 32. Then, the valve body 15 moves upward in the figure, and the flange part 19a and the shoulder part 15a abut as shown in FIG. 3 (bl).Therefore, the introduction of the atmosphere is blocked.
次にソレノイドコイル４４に供給する電流値を減少させ
ると、ムービングコア３２をステータコア３０側に吸引
する力よりも、第３スプリング３８及び第２スプリング
２６の付勢力の方が勝り、第３図（Ｃ）に示す様に弁箱
体１５が図中上方に移動する。弁箱体１５が上方に移動
すると、肩部１５ａにフランジ部１９ａが係合している
弁体１９も上方に移動し、弁体１９とシート部材１７と
の当接が解離する。その結果、入力ポート３より導かれ
る負圧が、第３図（Ｃ１中矢印Ｒで示す様にノート部材
１７と弁箱体１５との間隙を通って出力ポート５より出
力される。このとき、弁体１９のフランジ９（ｒ、と弁
箱体Ｉ５の肩？１ｒＳ１５ ａとは第１スプリング２１
の付勢力によって當に当接しており、大気ポート５から
の大気は遮断されている。Next, when the current value supplied to the solenoid coil 44 is decreased, the urging force of the third spring 38 and the second spring 26 becomes stronger than the force that attracts the moving core 32 toward the stator core 30, as shown in FIG. As shown in C), the valve body 15 moves upward in the figure. When the valve body 15 moves upward, the valve body 19 whose flange portion 19a is engaged with the shoulder portion 15a also moves upward, and the contact between the valve body 19 and the seat member 17 is released. As a result, the negative pressure introduced from the input port 3 passes through the gap between the notebook member 17 and the valve body 15 and is output from the output port 5 as shown by the arrow R in FIG. 3 (C1).At this time, The flange 9 (r) of the valve body 19 and the shoulder 1rS15 a of the valve body I5 are the first spring 21
, and the atmosphere from the atmosphere port 5 is blocked.
この様にソレノイドコイル４４に供給する電流を減少さ
せればさせるほど、弁体１９がシート部材１７より１夕
？離し、出力ポート５より出力される負圧は増大する。In this way, the more the current supplied to the solenoid coil 44 is reduced, the more the valve body 19 becomes closer to the seat member 17? When released, the negative pressure output from the output port 5 increases.
これを第４図に示す。この図よりもわかる様に出力負圧
が高い領域で制御される場合には、供給電流は少なくて
すむ。This is shown in FIG. As can be seen from this figure, when the output negative pressure is controlled in a high range, the supply current can be small.
以上述べた様に、本発明の圧力制御弁を用いれば、高い
出力負圧域で圧力を制御する場合、小さな電流で制御を
行うことができるので、ソレノイドコイルの発熱を抑え
ることができ、ソレノイドコイルの破損、その他の部品
の耐久性劣化を防ぐことができる。As described above, when using the pressure control valve of the present invention, when controlling pressure in a high output negative pressure range, it is possible to control with a small current, so it is possible to suppress the heat generation of the solenoid coil, and the solenoid coil This can prevent damage to the coil and deterioration of the durability of other parts.
第１図は本発明の実施例を示す断面図、第２図は第１図
実施例に用いた弁箱体及び弁体の拡大断面図、第３図は
作動を示すに供する要部断面図、第４図は出力特性図で
ある。
１・・・カバー、３・・・入力ポート、５・・・出力ポ
ート。
７・・・大気ポート、１３・・・ダイヤフラム、１５・
・・弁箱体、１５ａ・・・肩部、１９・・・弁体、３０
・・・ステータコア、３２・・・ムービングコア、４４
・・・ソレノイドコイル。Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the valve body and valve body used in the embodiment shown in Fig. 1, and Fig. 3 is a sectional view of essential parts used to illustrate the operation. , FIG. 4 is an output characteristic diagram. 1...Cover, 3...Input port, 5...Output port. 7...Atmospheric port, 13...Diaphragm, 15.
... Valve body, 15a... Shoulder, 19... Valve body, 30
... Stator core, 32 ... Moving core, 44
... Solenoid coil.
Claims (1)
ータコアに所定間隙を介して対向配置されるムービング
コアと、このステータコア及びムービングコアの外周に
巻装されるソレノイドコイルと、カバーによって挟持さ
れ一側面側にダイヤフラム室を、他側面側に大気室を形
成するダイヤフラムと、前記ダイヤフラム室に負圧を導
入するための入力ポートと、前記ダイヤフラム室内の負
圧を取り出すための出力ポートと、前記大気室に大気を
導入するための大気ポートと、前記入力ポートの開閉を
行う弁体と、前記ダイヤフラムに担持され前記ムービン
グコアの動きが伝達される弁箱体とを備え、前記弁箱体
には前記ムービングコアが前記ステータコアより離れる
方向のみに前記弁体に係合して前記弁体を開弁させる肩
部が形成されており、この肩部と前記弁体との当接、解
離によって前記大気室と前記ダイヤフラム室とが連通、
遮断される圧力制御弁。A stator core for forming a magnetic circuit, a moving core disposed opposite to the stator core with a predetermined gap therebetween, a solenoid coil wound around the outer periphery of the stator core and the moving core, and a solenoid coil sandwiched between covers and arranged on one side. A diaphragm chamber includes a diaphragm that forms an atmospheric chamber on the other side, an input port for introducing negative pressure into the diaphragm chamber, an output port for taking out the negative pressure in the diaphragm chamber, and a diaphragm that forms an atmospheric chamber on the other side. an atmospheric port for introducing the input port, a valve body for opening and closing the input port, and a valve body carried by the diaphragm to which the movement of the moving core is transmitted; is formed with a shoulder portion that engages with the valve body to open the valve body only in a direction away from the stator core, and when the shoulder portion and the valve body come into contact and dissociate, the atmospheric chamber and the Communication with the diaphragm chamber,
Pressure control valve shut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59181566A JPS6159077A (en) | 1984-08-29 | 1984-08-29 | Pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59181566A JPS6159077A (en) | 1984-08-29 | 1984-08-29 | Pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6159077A true JPS6159077A (en) | 1986-03-26 |
Family
ID=16103037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59181566A Pending JPS6159077A (en) | 1984-08-29 | 1984-08-29 | Pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6159077A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874814A (en) * | 1996-03-29 | 1999-02-23 | Sharp Kabushiki Kaisha | Brushless motor driven by applying varying driving signals |
| CN105658931A (en) * | 2013-10-14 | 2016-06-08 | 大陆汽车有限责任公司 | Valve |
| CN111473123A (en) * | 2020-04-20 | 2020-07-31 | 济南科泰科技有限公司 | High-sealing pneumatic diaphragm double-seat adjusting valve and working mode |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820772B2 (en) * | 1980-03-25 | 1983-04-25 | 株式会社東芝 | Processing method for brittle materials |
-
1984
- 1984-08-29 JP JP59181566A patent/JPS6159077A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820772B2 (en) * | 1980-03-25 | 1983-04-25 | 株式会社東芝 | Processing method for brittle materials |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874814A (en) * | 1996-03-29 | 1999-02-23 | Sharp Kabushiki Kaisha | Brushless motor driven by applying varying driving signals |
| CN105658931A (en) * | 2013-10-14 | 2016-06-08 | 大陆汽车有限责任公司 | Valve |
| CN111473123A (en) * | 2020-04-20 | 2020-07-31 | 济南科泰科技有限公司 | High-sealing pneumatic diaphragm double-seat adjusting valve and working mode |
| CN111473123B (en) * | 2020-04-20 | 2022-03-18 | 北阀集团北京阀门有限公司 | High-sealing pneumatic diaphragm double-seat adjusting valve and working mode |
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