JPS6225907B2 - - Google Patents
Info
- Publication number
- JPS6225907B2 JPS6225907B2 JP16074178A JP16074178A JPS6225907B2 JP S6225907 B2 JPS6225907 B2 JP S6225907B2 JP 16074178 A JP16074178 A JP 16074178A JP 16074178 A JP16074178 A JP 16074178A JP S6225907 B2 JPS6225907 B2 JP S6225907B2
- Authority
- JP
- Japan
- Prior art keywords
- solenoid valve
- time
- voltage
- transistor
- current
- 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
Links
- 238000000034 method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
この発明は電磁弁駆動電圧等の変動に対して開
弁に要する時間が変化しない電磁弁駆動方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving an electromagnetic valve in which the time required to open the valve does not change due to fluctuations in the electromagnetic valve driving voltage, etc.
従来、電磁弁駆動電圧が変動すると電磁弁に流
れる電流も変化するため、電磁弁の開弁までの遅
れ時間が変化し、実際の開弁時間が計算された値
に比べて変わつてしまつていた。また、電磁弁駆
動電圧を定電圧化するような方法では、変動する
電磁弁駆動電圧の最低電圧より低い電圧に安定化
しなければならないため、電圧の有効利用ができ
ず、かつ定電圧回路での発熱等により電力が無駄
になつていた。さらに、この電磁弁駆動電圧の定
電圧化は所定温度での電磁弁の開弁特性の値を補
正するものであり、電磁弁の周囲温度変化により
電磁弁コイルの抵抗値が変動した場合の開弁速度
の変化までは補正できなかつた。 Conventionally, when the solenoid valve drive voltage fluctuates, the current flowing through the solenoid valve also changes, which changes the delay time until the solenoid valve opens, causing the actual valve opening time to change compared to the calculated value. Ta. In addition, in the method of making the solenoid valve drive voltage constant, the voltage must be stabilized to a level lower than the lowest voltage of the fluctuating solenoid valve drive voltage, so the voltage cannot be used effectively, and the voltage cannot be used effectively in the constant voltage circuit. Electricity was wasted due to heat generation, etc. Furthermore, this constant voltage control of the solenoid valve drive voltage corrects the value of the opening characteristic of the solenoid valve at a predetermined temperature. It was not possible to compensate for changes in valve speed.
この発明は、上記欠点を解決するためになさ
れ、電磁弁に流れる電流を検出してこの電流が設
定値になつた時点で一度電流をしや断し、電磁弁
に電流を流し始めてから所定時間経過後に再び電
磁弁に電流を流し始め電磁弁を開弁することによ
り、電磁弁駆動電圧が高い場合にはこの電磁弁を
流れる電流が設定値に達ししや断されるまでの時
間が短かくなり、したがつて電流の中断時間（こ
の間電磁弁には磁気エネルギーが保持されてい
る）が長くなるが、前記の電流を流し始めてから
所定時間経過後の時点で再び電磁弁に電流を流し
始めたとき電磁弁の開弁立上り特性を一定にする
ことができ、また電磁弁駆動電圧が低い場合には
上記と逆の過程を経て電磁弁の開弁立上り特性を
一定にすることができる、周囲温度変化等にほと
んど影響されない電磁弁駆動方法の提供を目的と
している。 This invention was made to solve the above-mentioned drawbacks, and detects the current flowing through the solenoid valve, stops the current once the current reaches a set value, and then stops the current flowing through the solenoid valve for a predetermined period of time. By starting the current to flow through the solenoid valve again after the time has elapsed and opening the solenoid valve, if the solenoid valve drive voltage is high, the time required for the current flowing through the solenoid valve to reach the set value and then be cut off is shortened. Therefore, the interruption time of the current (magnetic energy is retained in the solenoid valve during this time) becomes longer, but the current starts flowing through the solenoid valve again after a predetermined period of time has elapsed since the above-mentioned current started flowing. When the solenoid valve's opening rising characteristic is constant, and when the solenoid valve drive voltage is low, the opening rising characteristic of the solenoid valve can be made constant through the reverse process to the above. The purpose of this invention is to provide a method for driving a solenoid valve that is almost unaffected by temperature changes.
以下この発明の方法を適用する装置を図に示す
実施例について説明する。第１図は電磁弁駆動回
路の電気回路図であり、１０は電磁弁２０を駆動
するための信号を入力する入力端子である。５０
は駆動回路図であり、抵抗１１，１２，１４，１
６，３０、トランジスタ１３，１５、ダイオード
１７で構成され、電磁弁２０に流れる電流は抵抗
３０（たとえば数オーム以下）により検出され
る。４０は単安定回路部であり、抵抗４２，４
３，４６，４８，４９、ダイオード４１，４５，
コンデンサ４４，トランジスタ４７で構成され、
コンデンサ４４の充電時間が、電磁弁２０に電流
を流し始めてから一旦中断し再び流し始めるまで
の時間として用いられている。６０は比較回路部
であり、抵抗６２，６３，６５，６６，６８，ダ
イオード６１，６４、比較器６７より構成され、
比較器６７の非反転入力端子７には抵抗６２，６
３，６５とツエナーダイオード６４により一定電
圧Ｖkが与えられている。比較器６７の反転入力
端子は抵抗６６を介して駆動回路部５０の電磁弁
２０に流れる電流検出用の抵抗３０の一方の端子
３に接続され、出力端子６は抵抗６８を介して単
安定回路部４０のトランジスタ４７のベースに接
続されている。なお＋ＶBは電源より供給される
電磁弁駆動電圧である。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus to which the method of the present invention is applied will be described below. FIG. 1 is an electrical circuit diagram of a solenoid valve drive circuit, and 10 is an input terminal into which a signal for driving the solenoid valve 20 is input. 50
is a drive circuit diagram, and resistors 11, 12, 14, 1
6, 30, transistors 13, 15, and a diode 17, and the current flowing through the electromagnetic valve 20 is detected by a resistor 30 (for example, several ohms or less). 40 is a monostable circuit section, and resistors 42, 4
3, 46, 48, 49, diode 41, 45,
Consisting of a capacitor 44 and a transistor 47,
The charging time of the capacitor 44 is used as the time from when the current starts flowing through the electromagnetic valve 20 until it is temporarily interrupted and starts flowing again. 60 is a comparison circuit section, which is composed of resistors 62, 63, 65, 66, 68, diodes 61, 64, and a comparator 67.
Resistors 62, 6 are connected to the non-inverting input terminal 7 of the comparator 67.
3 and 65 and a Zener diode 64 provide a constant voltage Vk . The inverting input terminal of the comparator 67 is connected via a resistor 66 to one terminal 3 of a resistor 30 for detecting the current flowing to the solenoid valve 20 of the drive circuit section 50, and the output terminal 6 is connected to a monostable circuit via a resistor 68. It is connected to the base of the transistor 47 of the section 40. Note that +V B is the electromagnetic valve drive voltage supplied from the power source.
次にこの電磁弁駆動回路の作動を第２図に示し
た波形図を用いて説明する。入力端子１０に第２
図１に示したような予め計算されたパルス幅Ｔの
“０”レベルのパルス電圧が時点t1で印加される
と、駆動回路部５０のトランジスタ１３がOFF
し、したがつてトランジスタ１５がONする。電
磁弁２０の一方の端子２の電圧は伝流検出用の抵
抗３０が小さい（たとえば数オーム以下）ので、
巨視的に見て第２図２のようにほぼ“０”レベル
の状態になり、電流検出用の抵抗３０の一方の端
子３の電圧は第２図３のように上昇する。また、
単安定回路部４０のトランジスタ４７は入力端子
１０が“１”レベルのときON状態にあり、コン
デンサ４４の一方の端子４は“０”レベルよりも
わずかに高く保たれている。時点t1で入力端子１
０が“０”レベルになると端子４の電圧も負の値
に下がりその後第２図４のように徐々に上昇す
る。端子３の電圧は第２図３のように時点t1と時
点t2の間では比較器６７の非反転入力端子７の基
準電圧ＶKよりも小さいため、この比較器６７の
出力端子６の電圧は第２図６のように“１”レベ
ルにあり、したがつてトランジスタ４７はON状
態にあつてこのコレクタ端子５は第２図５のよう
に“０”レベルの状態にある。電磁弁２０を流れ
る電流が徐々に上昇し、端子３の電圧が時点t2で
比較器６７の非反転入力端子７に加えられる電圧
ＶKに達すると比較器６７の出力端子６の電圧は
“０”レベルに反転し、したがつてトランジスタ
４７はOFFする。同時に、抵抗４８，４９を通
してベース電流が流れトランジスタ１３をON
し、トランジスタ１５をOFFすることにより、
電磁弁の一方の端子２の電圧は第２図２のように
“１”レベルに反転し電磁弁２０に流れる電流を
しや断する。また、トランジスタ４７のコレクタ
端子５は第２図５のように“１”レベルに反転
し、ダイオード６１を通して比較器６７の反転入
力端子の電圧を非反転入力端子７の電圧よりも高
く保つため、比較器６７の出力端子６を“０”レ
ベルに保ち続ける。時点t1から時点t2までの時間
は数μsec以下であり、この時間内に電磁弁２０
は磁気エネルギーを蓄積するが、電磁弁２０は開
弁しないか、開弁したとしてもごくわずかであ
る。さらに、単安定回路部４０のコンデンサ４４
の一方の端子４の電圧が上昇して時点t3でトラン
ジスタ４７をONすると端子５の電位は“０”レ
ベルに反転し、それまで電源（＋ＶB）より抵抗
４８，４９を介してトランジスタ１３に供給して
いた電流がトランジスタ４７側に流れてしまい、
そのためこのトランジスタ１３には抵抗４９を介
して電流供給されず、従つてトランジスタ１３が
OFF状態、トランジスタ１５がON状態にそれぞ
れ反転する。なお時点t1から時点t3までの時間は
一定に設定されている。同時に電磁弁２０は開弁
し始めるが、時点t1から時点t2までの間に電磁弁
２０に蓄積された磁気エネルギーは時点t2から時
点t3までの間もほとんど減衰することなく保持さ
れているため、電磁弁駆動電圧＋ＶBが変動した
り、周囲温度の変化により電磁弁２０のコイルの
抵抗値が変化しても、電磁弁２０の開弁立上り特
性はほとんど変化しない。電磁弁２０を流れる電
流が増加して端子３の電圧が時点t4で第２図３の
ように電圧ＶK（比較器６７の非反転入力端子７
の電圧）を超えると、比較器６７の出力端子６の
電圧は“０”レベルに反転するが、トランジスタ
４７は抵抗４３，４６，ダイオード４５により
ON状態に保たれている。このとき抵抗４９は不
導通となつており、トランジスタ１３はOFF状
態、トランジスタ１５はON状態に保持され、電
磁弁２０は開弁されている。この状態は入力端子
１０に印加されている第２図１のパルス電圧が時
点t5で“１”レベルに反転するまで保たれる。な
お、電磁弁２０が閉弁するときの時間つまり閉弁
立下り特性は電磁弁駆動電圧＋ＶB等にはほとん
ど影響されない。また、電磁弁２０が実質的に開
弁するのは第２図において時点t3から時点t5まで
の時間であり、時点t1から時点t3までの一定時間
は電磁弁２０に磁気エネルギーをたくわえる時間
である。 Next, the operation of this electromagnetic valve drive circuit will be explained using the waveform diagram shown in FIG. The second input terminal 10
When a “0” level pulse voltage with a pulse width T calculated in advance as shown in FIG. 1 is applied at time t1, the transistor 13 of the drive circuit section 50 is turned off.
Therefore, transistor 15 is turned on. Since the voltage at one terminal 2 of the solenoid valve 20 is small (for example, several ohms or less) due to the resistance 30 for current detection,
Macroscopically, the state is approximately at the "0" level as shown in FIG. 2, and the voltage at one terminal 3 of the current detection resistor 30 rises as shown in FIG. 2. Also,
The transistor 47 of the monostable circuit section 40 is in an ON state when the input terminal 10 is at the "1" level, and one terminal 4 of the capacitor 44 is maintained slightly higher than the "0" level. Input terminal 1 at time t 1
When 0 becomes the "0" level, the voltage at the terminal 4 also drops to a negative value and then gradually rises as shown in FIG. 24. Since the voltage at terminal 3 is smaller than the reference voltage V K at non-inverting input terminal 7 of comparator 67 between time t 1 and time t 2 as shown in FIG. The voltage is at the "1" level as shown in FIG. 2, so the transistor 47 is in the ON state and the collector terminal 5 is at the "0" level as shown in FIG. 2. When the current flowing through the solenoid valve 20 gradually increases and the voltage at the terminal 3 reaches the voltage V K applied to the non-inverting input terminal 7 of the comparator 67 at time t 2 , the voltage at the output terminal 6 of the comparator 67 becomes “ The signal is inverted to 0'' level, and the transistor 47 is therefore turned off. At the same time, base current flows through resistors 48 and 49, turning on transistor 13.
Then, by turning off the transistor 15,
The voltage at one terminal 2 of the solenoid valve is reversed to the "1" level as shown in FIG. 2, and the current flowing through the solenoid valve 20 is cut off. In addition, the collector terminal 5 of the transistor 47 is inverted to the "1" level as shown in FIG. The output terminal 6 of the comparator 67 is kept at the "0" level. The time from time t 1 to time t 2 is several μsec or less, and within this time the solenoid valve 20
stores magnetic energy, but the solenoid valve 20 does not open or opens only a small amount. Furthermore, the capacitor 44 of the monostable circuit section 40
When the voltage at one terminal 4 rises and the transistor 47 is turned on at time t3 , the potential at the terminal 5 is inverted to the "0" level, and until then, the voltage at the transistor 13 is connected to the power supply (+V B ) via the resistors 48 and 49. The current that was being supplied to the transistor 47 flows to the transistor 47 side,
Therefore, current is not supplied to this transistor 13 via the resistor 49, and therefore the transistor 13 is
The OFF state and the transistor 15 are respectively inverted to the ON state. Note that the time from time t 1 to time t 3 is set constant. At the same time, the solenoid valve 20 begins to open, but the magnetic energy accumulated in the solenoid valve 20 from time t 1 to time t 2 is maintained without attenuating almost from time t 2 to time t 3 . Therefore, even if the solenoid valve drive voltage +V B fluctuates or the resistance value of the coil of the solenoid valve 20 changes due to a change in ambient temperature, the opening start-up characteristic of the solenoid valve 20 hardly changes. As the current flowing through the solenoid valve 20 increases, the voltage at the terminal 3 increases as shown in FIG .
voltage), the voltage at the output terminal 6 of the comparator 67 is inverted to the "0" level, but the transistor 47 is
It is kept in the ON state. At this time, the resistor 49 is non-conductive, the transistor 13 is kept in the OFF state, the transistor 15 is kept in the ON state, and the solenoid valve 20 is opened. This state is maintained until the pulse voltage of FIG. 21 applied to the input terminal 10 is inverted to the "1" level at time t5 . Note that the time when the solenoid valve 20 closes, that is, the valve closing falling characteristic, is hardly affected by the solenoid valve drive voltage +V B and the like. Further, the solenoid valve 20 is substantially opened from time t 3 to time t 5 in FIG. 2, and magnetic energy is applied to the solenoid valve 20 for a certain period of time from time t 1 to time t 3 . It's time to save.
また、この発明になる電磁弁駆動方法は、たと
えばエンジンのアイドル回転を調節する装置等に
使用される電磁弁を制御するために用いられる。 Further, the solenoid valve driving method according to the present invention is used to control a solenoid valve used in, for example, a device for adjusting the idle rotation of an engine.
以上詳細に説明したように、この発明は、電磁
弁に流れる電流を検出してこの電流が設定値にな
つた時点で一度電流をしや断し、電磁弁に電流を
流し始めてから所定時間経過後に再び電磁弁に電
流を流し始め電磁弁を開弁するようにしたことに
より、電磁弁駆動電圧の変動、電磁弁コイルの抵
抗値の周囲温度による変化等に対して電磁弁の開
弁立上り特性を一定にすることができるというす
ぐれた効果を有する。 As explained in detail above, the present invention detects the current flowing through the solenoid valve, once the current reaches a set value, the current is cut off, and after a predetermined period of time has elapsed since the current started flowing through the solenoid valve. Later, by starting to flow current through the solenoid valve again and opening the solenoid valve, the opening characteristics of the solenoid valve can be improved against fluctuations in the solenoid valve drive voltage, changes in the resistance value of the solenoid valve coil due to ambient temperature, etc. It has the excellent effect of being able to maintain a constant value.
第１図はこの発明の方法を実施する装置の一実
施例を示す電気回路図、第２図は第１図に示した
電気回路図の各部の波形図である。
２０……電磁弁、４０……単安定回路部、５０
……駆動回路部、６０……比較回路部。
FIG. 1 is an electric circuit diagram showing an embodiment of an apparatus for carrying out the method of the present invention, and FIG. 2 is a waveform diagram of each part of the electric circuit diagram shown in FIG. 20... Solenoid valve, 40... Monostable circuit section, 50
. . . Drive circuit section, 60 . . . Comparison circuit section.
Claims (1)
圧を印加したときこの電磁弁に流れる電流を検出
し、この電流が設定値になつた時点から、前記電
磁弁への前記パルス電圧の印加時期より所定時間
経過後の時点までの間、前記電磁弁への前記パル
ス電圧の印加を中断し、その後再び前記パルス電
圧が消滅するまで前記電磁弁に前記パルス電圧を
印加し前記電磁弁を開弁することを特徴とする電
磁弁駆動方法。1. When a pulse voltage with a pre-calculated pulse width is applied to the solenoid valve, the current flowing through the solenoid valve is detected, and from the time when this current reaches the set value, from the time when the pulse voltage is applied to the solenoid valve. The application of the pulse voltage to the solenoid valve is interrupted until a predetermined time has elapsed, and then the pulse voltage is applied to the solenoid valve again until the pulse voltage disappears, and the solenoid valve is opened. A method for driving a solenoid valve, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16074178A JPS5586977A (en) | 1978-12-21 | 1978-12-21 | Solenoid valve driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16074178A JPS5586977A (en) | 1978-12-21 | 1978-12-21 | Solenoid valve driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5586977A JPS5586977A (en) | 1980-07-01 |
| JPS6225907B2 true JPS6225907B2 (en) | 1987-06-05 |
Family
ID=15721444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16074178A Granted JPS5586977A (en) | 1978-12-21 | 1978-12-21 | Solenoid valve driving method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5586977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6452331U (en) * | 1987-09-28 | 1989-03-31 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005223168A (en) * | 2004-02-06 | 2005-08-18 | Mitsubishi Electric Corp | Electromagnetic actuator and control method thereof |
-
1978
- 1978-12-21 JP JP16074178A patent/JPS5586977A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6452331U (en) * | 1987-09-28 | 1989-03-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5586977A (en) | 1980-07-01 |
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