JPS58677A - Solenoid proportional valve driving circuit - Google Patents
Solenoid proportional valve driving circuitInfo
- Publication number
- JPS58677A JPS58677A JP9793181A JP9793181A JPS58677A JP S58677 A JPS58677 A JP S58677A JP 9793181 A JP9793181 A JP 9793181A JP 9793181 A JP9793181 A JP 9793181A JP S58677 A JPS58677 A JP S58677A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- magnet
- proportional valve
- resistor
- solenoid proportional
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/066—Electromagnets with movable winding
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はガス機器のガス流量調節等に用いられ、永久磁
石と駆動コイルとを具備する電磁式比例弁の駆動回路に
関し、特に、永久磁石温度に応じて駆動コイル電流を制
御することにより、永久研石温度変動によるガス流量変
動を補償し、常に安定したガス流量が得られる駆動回路
を提供することを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive circuit for an electromagnetic proportional valve that is used to adjust the gas flow rate of gas appliances and is equipped with a permanent magnet and a drive coil. The present invention aims to provide a drive circuit that compensates for gas flow rate fluctuations due to permanent grinding stone temperature fluctuations and provides a stable gas flow rate at all times.
永久磁石と駆動コイルとを組合せた電磁式比例弁として
は、例えば第６図に示すような構造のものが従来より使
用されている。第１図で、１は永久磁石、２は駆動コイ
ルである１、永久磁石１の残留出朱雀度をＢとし、コイ
ル２の有効長をＬ、コイル２の通電電流をＩ６とすると
、コイルと磁石相斤に作用する力Ｆは（１）式で表わせ
る。As an electromagnetic proportional valve that combines a permanent magnet and a drive coil, one having a structure as shown in FIG. 6, for example, has been conventionally used. In Fig. 1, 1 is a permanent magnet, 2 is a driving coil, 1 is the residual radiance of permanent magnet 1, B is the effective length of coil 2, and current flowing through coil 2 is I6. The force F acting on the magnet can be expressed by equation (1).
Ｆ＝Ｊ ＢＬ ・・・−・・（１
）この力Ｆは、支持部品３ｆ：介してダイアフラム４に
印加される。一方ダイアフラム４には、入［−１圧力ｔ
Ｐｌ ＋ダイアフラム有効径をＳＤとすると、ＰｌＳ
Ｄなる力が印加されている。６は弁体で、入［１圧力Ｐ
により、その有効径をＳｖとすると、Ｐ１Ｓｖなる力を
受ける。弁体６はさらに、ＰｌＳｖとは逆向きに、出口
圧力をＰとし、バネ６の反力をＦ８とすると、Ｐ２Ｓｖ
＋Ｆ８なる力を受ける。なお７は、弁のハウジング、１
４はダイアフラムの片面を大気圧とする通気口である。F=JBL...-(1
) This force F is applied to the diaphragm 4 via the support part 3f. On the other hand, the diaphragm 4 has an input [-1 pressure t
If Pl + diaphragm effective diameter is SD, then PlS
A force D is applied. 6 is the valve body, the input [1 pressure P
Therefore, if its effective diameter is Sv, it receives a force of P1Sv. Further, the valve body 6 is opposite to PlSv, and when the outlet pressure is P and the reaction force of the spring 6 is F8, P2Sv
Receives the force +F8. Note that 7 is the valve housing, 1
Reference numeral 4 denotes a vent hole that allows atmospheric pressure to be applied to one side of the diaphragm.
以上の力関係をまとめると、（２）戊で表わ亡る。なお
（２）式では弁体５、コＦ＋Ｐ１ＳＶ＝Ｐ１ＳＤ＋Ｐ２
ＳＶ＋ＦＳ 、、、、（２）イル２、支持部品３の自
重は無視している。今、５ｖ＝ＳＤ＝Ｓとすると、（３
）式のようになる。従がＦ ＝Ｐ ２ Ｓ ＋ Ｆ ｓ
・・・・ （３）って、電流Ｉδを
制御すれば、電磁力Ｆが制御され、出口圧力Ｐ２が側倒
され、ガス流かが制御さｔすることとなる。To summarize the above power relationships, (2) 把 is expressed and destroyed. In addition, in equation (2), valve body 5, koF+P1SV=P1SD+P2
SV+FS, (2) The weight of the coil 2 and the support part 3 is ignored. Now, if 5v=SD=S, (3
) is as follows. Minor is F = P 2 S + F s
(3) If the current Iδ is controlled, the electromagnetic force F is controlled, the outlet pressure P2 is shifted, and the gas flow is controlled.
第６図の電磁式比例弁の電流１ 対出口圧力Ｐ２の関係
を示すと第７図のようになる。永久磁石１の残留磁束密
度Ｂは通常温ル″特性を有し１．例對−ばバリウムフェ
ライト製のそれでは、−０、Ｉ ８％、６■程度の温度
特性を有する。ゆえに、コイル電流Ｉ。The relationship between current 1 and outlet pressure P2 of the electromagnetic proportional valve shown in FIG. 6 is shown in FIG. 7. The residual magnetic flux density B of the permanent magnet 1 usually has a temperature characteristic of 1.For example, a permanent magnet made of barium ferrite has a temperature characteristic of about -0, I 8%, and 6■.Therefore, the coil current I .
全一定にして、磁石１の温度Ｔを変化させれば、温度Ｔ
が高くなるにつれ、残留磁束密度Ｂが減ぜられ、電磁力
Ｆが小となり、出口圧力Ｐ２が低下し、流量すなわちバ
ーナ燃焼部は低下する。すなわち、電流工 をＩ と
し温兜Ｔが低い（Ｔ、）、中程度Ｏｍａｘ
（Ｔ ）、高い（ＴＨ）に応じて出口圧力Ｐ は、ＰＭ
２ ２３’Ｐ２２Ｉ Ｐ２１と低下する。このこと
は、電流Ｉｍａ！により、電磁式比例弁を装着するガス
機器７）最大燃゛；算量Ｑ を規制ビんとする場合、
温度Ｔが中 ａ ｒ
程度のＴＭで規制すると、温度Ｔ、では、Ｑｍａｘが大
きくなりすぎ、機器に悪影響を及ぼし、温１辻ＴＨでは
ＱｍａＸが小さくなり機器のフル能力を発揮できなくな
る。例えば、温度ＴＭＫ対し、ＴＬ、ＴＨが各々５０ｄ
ｅｇ変動するとすれば、バリウムフェライト製の磁石で
あれば、ＴＬでは＋９％、ＴＨでは−９％変動すること
になる。If the temperature T of magnet 1 is changed while keeping it completely constant, the temperature T
As becomes higher, the residual magnetic flux density B decreases, the electromagnetic force F becomes smaller, the outlet pressure P2 decreases, and the flow rate, that is, the burner combustion section decreases. In other words, assuming that the electric current is I, the outlet pressure P is PM
2 23'P22I P21. This means that the current Ima! According to gas equipment equipped with an electromagnetic proportional valve 7) maximum combustion; when the calculation Q is used as the regulation bottle,
If the temperature T is regulated by a TM of about medium ar, then at the temperature T, Qmax will become too large, which will have an adverse effect on the equipment, and at a warm TH, Qmax will become small and the equipment will not be able to demonstrate its full capacity. For example, TL and TH are each 50d with respect to temperature TMK.
If eg changes, in the case of a barium ferrite magnet, it will change by +9% in TL and -9% in TH.
この種電極式比例弁の、駆動−１路としては、例えば第
８図に示す回路が従来より用られてきた。第８１ｙ、１
で、Ｖｉは制御電圧、１２はオペアンプ１２へトランジ
スタ１２Ｂ、エミッタ抵抗１２Ｃて形成する一紳のボル
テージツメロワで、これが駆動回路である。２は比例弁
の駆動コイルである。抵抗１２Ｃの抵抗値をＲとすると
、
ｖｔ＝ｘ Ｒ、、、（４）
となる。ゆえに、制御人力Ｖ ｉ ｆ制御することによ
り、コイル電流Ｉδが制御され、ガス流量が制御される
。この回路では、永久磁石１の温度補償がされていない
ので、上述した問題点が発生する。For example, a circuit shown in FIG. 8 has been conventionally used as the drive-1 path of this type of electrode proportional valve. No. 81y, 1
Here, Vi is a control voltage, and 12 is a voltage regulator formed by an operational amplifier 12, a transistor 12B, and an emitter resistor 12C, and this is a drive circuit. 2 is a drive coil for the proportional valve. If the resistance value of the resistor 12C is R, then vt=x R, (4). Therefore, by controlling the human power V i f, the coil current Iδ is controlled and the gas flow rate is controlled. In this circuit, since the temperature of the permanent magnet 1 is not compensated for, the above-mentioned problem occurs.
そこで、従来より提案されている温度補償回路を示すと
、例えば第９図に示すように、Ｐ板子ｒ（設けたサーミ
スタ等の非直税感副抵抗素子１３に固定抵抗１２Ｃ１，
１２Ｃ３，１２Ｃ４を直列ま／こは並列に設け、これら
の合成抵抗値を抵抗１２Ｃの抵抗値とし、永久磁石１の
温匣袖イ１：を・せ４占した３、第（４）式から明らか
な、Ｌうに、温度Ｔの変化（・二対して、磁石１の残留
磁束密１長Ｂが負の濡出係数／Ｊ ｆｆ−有する場合、
すなわちＢ−Ｂｏ（１＋αＴ）７′ｉ−る場合、電流Ｉ
。ｆ：□ ｌｏ−Ｉ。。（ｉ ＋ （−ａ ）Ｔ ）に
なるように変化させれは、磁石１の温度特性を補償でき
る３、すなわち抵抗Ｒｆ ｌ １ ／１ ＋ （−ａ
） Ｔ ｉの」二うに変化させれば２Ｌい。Therefore, a conventionally proposed temperature compensation circuit is shown, for example, as shown in FIG.
12C3 and 12C4 are connected in series and in parallel, their combined resistance value is the resistance value of the resistor 12C, and the permanent magnet 1's warm sleeve A1: is set to 4. 3. From equation (4), Obviously, when the residual magnetic flux density 1 length B of the magnet 1 has a negative wetting coefficient /J ff-,
That is, if B-Bo(1+αT)7'i-, the current I
. f: □ lo-I. . (i + (-a)T), the resistance Rfl 1 /1 + (-a
) If you change T i's to 2, it becomes 2L.
（７かしながら、第９図でＩＪ＜ずような回路ては、忰
めて秋い範囲の＋！＋７．吸変動に対しては近（Ｊｊ的
に抵抗Ｒを」述の」：うにてきても、最も補償を必〃と
する磁石１のＪ′１．低温ＩＢ伺近、 ／ｆ〕高幅吸付
近で仁１補償１、 ？に、 −ｈ ｆｘ イ。寸／コ、
磁石１の温ＩＪＪｆ テｆＣｊなく１．！ｌｒ！ ＃Ｉ
ＪＪＭ路（，１近の温度分・検出するために、ＬＡ 度
のズレか）１じ１Ｆ血な補償ができない、。(However, in Fig. 9, the circuit where IJ < is +! +7. Even if it comes, J'1 of magnet 1, which requires the most compensation, near low-temperature IB, /f] In the vicinity of high width suction, 1 compensation 1, -h fx A. size/ko,
Temperature of magnet 1 IJJf Te fCj 1. ! lr! #I
JJM road (, 1 degree difference in LA degree to detect temperature near 1F) cannot compensate for 1F blood.
本発明ｔｌ１、ｌ’、 ＋！Ｌ ｆ＋’ｌ’−末例に鑑
み、寸ず峰イ１１の近傍に感温枦抗８７を一般け、砒イ
１１のｌ！、Ｍ １Ｂ−をできるだけ１１確に＋９・出
する１、うにし、第２ｐＣ１感温抵４ル器として直イコ
・・的かつ１１の温度時ｒ１を有する感渦抵Ｊ！゛［１
’！：”ｉ Ｓ−使用し１．’ｃ Ｊ） ＩＪ（抗ｆ＋
？ｊ ニ１心Ｕ テ駆動ＩＩＬ＋（Ｃ５制御ｉｌｕする
ものであり、これにより、磁石１の温度前件７こよる流
歌変劾を正確に補償玄るもっでちる。The present invention tl1, l', +! L f + 'l' - In view of the last example, a temperature-sensitive resistor 87 is generally placed near Tsuzumine I11, and l of A11 is set. , M 1B- as 11 as accurately as possible +9.1, the second pC1 temperature-sensitive resistor 4 is directly equal... and has r1 at a temperature of 11.゛[1
'! :”i S-use 1.'c J) IJ (anti-f+
? j Ni1 core U Te drive IIL+ (C5 control ilu) This makes it possible to accurately compensate for fluctuations caused by the temperature antecedent 7 of the magnet 1.
第１スは、本発明ゴ実施例で、電磁式比例弁の磁石１に
感温抵抗器８を装着した場合でちる。この例では、磁石
１の温度Ｔを感温抵抗器８により、ｉ１Ｅ確に検出でき
る。より簡便かつ容易な方θミとしては、磁石２とハウ
ジング７との温度がほぼ同一と見なせる場合に使用打止
で、・・ウジング７表ｒ１１設置４またはハウジングＴ
内に感温抵抗奏子８を狸込むことによってもげ能でちる
。The first case is an embodiment of the present invention in which a temperature-sensitive resistor 8 is attached to the magnet 1 of the electromagnetic proportional valve. In this example, the temperature T of the magnet 1 can be accurately detected by the temperature sensitive resistor 8. A simpler and easier method is to stop using it when the temperatures of the magnet 2 and the housing 7 can be considered to be almost the same.
By inserting the temperature-sensitive resistor 8 inside, it is possible to perform a moge-noh performance.
第２図は本発明−実施例の駆動回路であって、１０が駆
動回路で、オペアンプ１０Ａ、トランジスタ１０Ｂ１エ
ミツタ抵抗１０Ｃ，エミツタ抵抗１０Ｃ両端電圧ｖ６を
正特性直線特性の感？Ｊ、ｉＵ（抗器８と抵抗１０Ｄよ
りなる帰還回路を通して、オペアンプに負帰還する。こ
こで制仰入力電月４をＶｉ。FIG. 2 shows a drive circuit according to an embodiment of the present invention, where 10 is a drive circuit, an operational amplifier 10A, a transistor 10B, an emitter resistor 10C, and a voltage v6 across the emitter resistor 10C, which has a positive linear characteristic. J, iU (negative feedback is provided to the operational amplifier through a feedback circuit consisting of a resistor 8 and a resistor 10D. Here, the suppressor input voltage 4 is Vi.
比例弁コイル電流を工６、抵抗器１０Ｃの抵抗器をＲｃ
、抵抗器１０Ｄの抵抗値をＲＤ、感温抵抗２：（８つ抵
抗値をＡＲＤとすると、次式う；成立する。Set the proportional valve coil current as 6, and set the resistor of resistor 10C as Rc.
, the resistance value of the resistor 10D is RD, and the resistance value of the temperature-sensitive resistor 2: (8) is ARD. Then, the following formula holds true.
これをＩ。について書くと、
ここで、感温抵抗器８は正特性直線特性を示すから、温
度係数をβで示すと（７）式のように書・１する。This is I. Here, since the temperature sensitive resistor 8 exhibits a positive linear characteristic, if the temperature coefficient is denoted by β, it can be written as equation (7).
Ａ＝Ａ （１＋βＴ） ・・・・（′７）（６
）と（７）より。A=A (1+βT) ...('7)(6
) and (7).
（＠式より、■。＝−αＴなる温度係数をもたせるため
１＋Ａ。(From @formula, ■. = 1+A to have a temperature coefficient of -αT.
を満足するＡ。、βがちればよい。例えば、αが−０，
１８％／ｄｅｑ、Ａｏ−１ とすれば、：０．３６φ／
ｄｅｇ
となる。このように例えば、０．３６係７／ｄｅｇなる
温度係数を何する感温抵抗器８は大手可能で、例えばニ
ッケルを主成分とする感温抵抗器で、この温度係数を有
するものが存在する。この例で６寸、八〇が１の場合、
βを０．３６％／ｄｅｑの感温抵抗器を使用することに
より、バリウムフェライト製７）磁石１の温度特性によ
る流計変動を正確に補償できることとなる。A that satisfies. , β should be different. For example, α is −0,
If 18%/deq, Ao-1, then: 0.36φ/
It becomes deg. In this way, for example, there are temperature-sensitive resistors 8 that have a temperature coefficient of 0.36/7/deg, and there are, for example, temperature-sensitive resistors whose main component is nickel that has this temperature coefficient. . In this example, if 6 sun and 80 are 1,
By using a temperature sensitive resistor with β of 0.36%/deq, it is possible to accurately compensate for flow meter fluctuations due to the temperature characteristics of the barium ferrite magnet 1.
第３図は、本発明の他の実施例の回路図で、第２図の回
路では、（９）１式に示すように、ゲインにはる回路で
、側副入力電圧ｖ１を抵抗１０Ｅ 、 １ ｏＦで分割
してオペアンプ１０Ａに入力する。オペアンプ１ｏＡつ
入力電圧Ｖｉ’は、抵抗１０Ｅ 、１ｏＦの抵抗器をＡ
。ＲＦ 、 ＲＦとすると、で表する。従がって、Ｉｏ
は、
となり、ゲインは、Ｖ ｉ ／Ｒｃとなり、抵抗８゜１
０Ｄを付加しない場合のゲインと同一にできろ。FIG. 3 is a circuit diagram of another embodiment of the present invention. In the circuit of FIG. 2, as shown in equation (9) 1, the secondary input voltage v1 is connected to the resistor 10E, The signal is divided by 1 oF and input to the operational amplifier 10A. The input voltage Vi' of an operational amplifier 1oA is 10E, 1oF resistor is A
. RF, RF is expressed as. Therefore, Io
is, the gain is V i /Rc, and the resistance is 8゜1
Make it the same as the gain without adding 0D.
第４図の回路は本＠凋つ池の実施例で、制御入力電圧Ｖ
ｉが負入力の場合の実施例である。ここで、制御人力Ｖ
ｉと、コイル電流工。との関係は、但し、Ｒｃは、抵抗
器１０Ｃの抵抗値、Ｂは感温抵抗器と抵抗１０Ｇとり抵
抗値の比、γは感温抵抗器８の温度係数でちる。電流Ｘ
。に、（−α）なる温度係数をもたするたｖ）Ｖｃは、
Ｔ−−αを満足すればよい。The circuit shown in Fig. 4 is an example of the book@Shintsuike, and the control input voltage V
This is an example in which i is a negative input. Here, control human power V
i and coil electrician. However, Rc is the resistance value of the resistor 10C, B is the ratio of the resistance value of the temperature sensitive resistor and the resistor 10G, and γ is the temperature coefficient of the temperature sensitive resistor 8. current
. v) Vc has a temperature coefficient of (-α),
It is sufficient if T--α is satisfied.
こ、う回路により、制御人力Ｖｉが負電圧に？４Ｌａ、
でき、またＢ＝＝１に選べばゲインはＶ ｉ ／ＲＣと
することができる。またＢの値に無因係にγ＝−αと選
ぶことによって、正確に温度補償ができる。Is the control force Vi a negative voltage due to this bypass circuit? 4La,
If B==1 is selected, the gain can be set to V i /RC. Moreover, by selecting γ=-α regardless of the value of B, accurate temperature compensation can be achieved.
第６図の回路は、本発明の他の実施例で、感温抵抗器８
−や抵抗１０Ｄの抵抗値が、抵抗１０Ｃのそれに比し充
分大きくないときに用いることができる回路である。す
なわち１０Ｈなるオペアンプで、ボルテージフォロワを
構成することによりインピーダンス変換を行ない、感温
抵抗器８、抵抗１ｏＤの負荷効果をなくすことができる
。The circuit of FIG. 6 is another embodiment of the present invention, in which the temperature sensitive resistor 8
- This circuit can be used when the resistance value of the resistor 10D is not sufficiently larger than that of the resistor 10C. That is, by configuring a voltage follower with a 10H operational amplifier, impedance conversion can be performed and the load effect of the temperature sensitive resistor 8 and the 1oD resistor can be eliminated.
以上詳述したように、本発明は、永久磁石として比較的
安価愼あるが温度特性を有する材質のもの・を使用した
電磁式抗例弁の温度特性を、磁石イ」近に設けた感温抵
抗器の抵抗値に応じてコイル電流を制御して、補償する
ものであり、極めて正確な温度補償ができる、安価な磁
石を用いることができるといった優れた効果を奏する。As described in detail above, the present invention improves the temperature characteristics of an electromagnetic counter valve using a material that is relatively inexpensive but has temperature characteristics as a permanent magnet. The coil current is controlled and compensated according to the resistance value of the resistor, and has excellent effects such as extremely accurate temperature compensation and the ability to use inexpensive magnets.
第１図は本発明の一実施例の感温抵抗器の電磁式比例弁
への装着例を示す断面図、第２図は本発明／）一実施例
の駆動回路図、第３図は本発明の他の実施例の駆動回路
図、第４図は本発明のさらに他り実施例の駆動回路図、
第６図は本発明のさらに他の実施例の駆動回路図、第６
図は従来の電磁式比例弁の構造断面図、第７図は第６図
の比例弁のＩＰ特性図、第８図は従来の駆動回路図、第
９図イ１口は従来の温度補償回路図である。
１・・・・・・磁石、２・・・・・・駆゛動コイル、８
・・・・・・感温抵抗器、１０・・・・・・駆動回路。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
２ 図
第３図
廠
第 ４ 図
賑
第５５１１
蘂６図
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何） （ロ）Fig. 1 is a sectional view showing an example of mounting a temperature-sensitive resistor according to an embodiment of the present invention on an electromagnetic proportional valve, Fig. 2 is a drive circuit diagram of an embodiment of the present invention, and Fig. 3 is a diagram of the present invention. A drive circuit diagram of another embodiment of the invention, FIG. 4 is a drive circuit diagram of still another embodiment of the invention,
FIG. 6 is a driving circuit diagram of still another embodiment of the present invention.
The figure is a cross-sectional view of the structure of a conventional electromagnetic proportional valve, Figure 7 is an IP characteristic diagram of the proportional valve in Figure 6, Figure 8 is a conventional drive circuit diagram, and Figure 9 A1 is a conventional temperature compensation circuit. It is a diagram. 1... Magnet, 2... Drive coil, 8
... Temperature sensitive resistor, 10 ... Drive circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure 3 Factory No. 4 Figure Busy No. 5511 Figure 6 J@7 Figure 8 Figure 7 To Figure 9 What) (B)
Claims (1)
磁石近傍に設けた感温抵抗器の抵抗値に応じて前記駆動
コイルへの通電電流を制御する電磁式比例弁駆動回路。An electromagnetic proportional valve drive circuit that controls the current applied to the drive coil according to the resistance value of a temperature-sensitive resistor provided near the permanent magnet of the electromagnetic proportional valve, which is equipped with a 58-stone magnet and a drive coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9793181A JPS58677A (en) | 1981-06-23 | 1981-06-23 | Solenoid proportional valve driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9793181A JPS58677A (en) | 1981-06-23 | 1981-06-23 | Solenoid proportional valve driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58677A true JPS58677A (en) | 1983-01-05 |
| JPS6234994B2 JPS6234994B2 (en) | 1987-07-30 |
Family
ID=14205414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9793181A Granted JPS58677A (en) | 1981-06-23 | 1981-06-23 | Solenoid proportional valve driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58677A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0246383A (en) * | 1988-08-05 | 1990-02-15 | Takagi Ind Co Ltd | Vibration suppressing mechanism for gas regulator valve |
| US5265842A (en) * | 1992-10-01 | 1993-11-30 | Federal-Mogul Corporation | Emission control metering valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130114A (en) * | 1981-02-04 | 1982-08-12 | Matsushita Electric Ind Co Ltd | Fluid proportional control valve |
-
1981
- 1981-06-23 JP JP9793181A patent/JPS58677A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130114A (en) * | 1981-02-04 | 1982-08-12 | Matsushita Electric Ind Co Ltd | Fluid proportional control valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0246383A (en) * | 1988-08-05 | 1990-02-15 | Takagi Ind Co Ltd | Vibration suppressing mechanism for gas regulator valve |
| US5265842A (en) * | 1992-10-01 | 1993-11-30 | Federal-Mogul Corporation | Emission control metering valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234994B2 (en) | 1987-07-30 |
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