JPH09296775A - Electromagnetic pump and liquid fuel supplying device - Google Patents

Electromagnetic pump and liquid fuel supplying device

Info

Publication number
JPH09296775A
JPH09296775A JP11362696A JP11362696A JPH09296775A JP H09296775 A JPH09296775 A JP H09296775A JP 11362696 A JP11362696 A JP 11362696A JP 11362696 A JP11362696 A JP 11362696A JP H09296775 A JPH09296775 A JP H09296775A
Authority
JP
Japan
Prior art keywords
combustion
pulse
liquid fuel
discharge amount
discharge
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
Application number
JP11362696A
Other languages
Japanese (ja)
Other versions
JP3602256B2 (en
Inventor
Hisaya Kuribayashi
久也 栗林
Shuichi Hiramatsu
秀一 平松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silver Co Ltd
Original Assignee
Silver Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Silver Co Ltd filed Critical Silver Co Ltd
Priority to JP11362696A priority Critical patent/JP3602256B2/en
Publication of JPH09296775A publication Critical patent/JPH09296775A/en
Application granted granted Critical
Publication of JP3602256B2 publication Critical patent/JP3602256B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Electromagnetic Pumps, Or The Like (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

PROBLEM TO BE SOLVED: To control the combustion to good combustion efficiency, with more accurate discharge of liquid fuel, at both maximum combustion time and minimum combustion time. SOLUTION: Like in the case of fluctuation in the discharge of liquid fuel, even if the variation characteristics of the discharge, when the pulse width is varied, are fluctuated in individual electromagnetic pumps 11, a fixed resistor 13, which shows a prescribed value at the time of maximum combustion, is selected so that the discharge is adjusted to a prescribed range, while another fixed resistor 14, which shows a prescribed value at the time of minimum combustion, is selected so that the discharge is adjusted to a prescribed value. As a result, the fluctuation in the discharge at the time of maximum combustion and minimum combustion can be restricted within a prescribed range, so that the combustion can be controlled to more accurate discharge of liquid fuel. Whit this, red fire or incomplete combustion, which takes place in the vicinity of the fuel quantity of minimum combustion or maximum combustion due to the difference in the mixing ratio of the fuel to the combustion air, can be prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、例えば民生用の石
油燃焼器などに白灯油などの液体燃料を供給する電磁ポ
ンプおよび液体燃料供給装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic pump and a liquid fuel supply device for supplying a liquid fuel such as white kerosene to a petroleum combustor for consumer use.

【0002】[0002]

【従来の技術】従来、この電磁ポンプは、シリンダ内に
フリーピストン状のプランジャーを電磁力で往動させか
つこれをばね圧で復動させている。この往動時に、電磁
ポンプは、加圧された流体燃料の圧力で吐出用逆止弁を
押し開かせながら流体燃料を吐出口より吐出させるよう
になっている。このような電磁ポンプの液体燃料供給制
御について、図5を参照して説明する。
2. Description of the Related Art Heretofore, in this electromagnetic pump, a free piston-shaped plunger is moved forward in a cylinder by an electromagnetic force and is returned by a spring pressure. During this forward movement, the electromagnetic pump discharges the fluid fuel from the discharge port while pushing and opening the discharge check valve with the pressure of the pressurized fluid fuel. Liquid fuel supply control of such an electromagnetic pump will be described with reference to FIG.

【0003】図5は従来の電磁ポンプおよびその制御部
の構成図である。図5において、この電磁ポンプ51に
は、上記電磁力を発生させるための電磁コイル52が配
設されている。この電磁コイル52の一方端子は、流体
燃料吐出量調整用の固定抵抗器53を介してパルス出力
駆動回路54の一方の出力端子に接続され、また、電磁
コイル52の他方端子はパルス出力駆動回路54の他方
の出力端子に接続されており、電磁コイル52は、パル
ス出力駆動回路54から駆動パルスで供給される断続電
流によって繰り返し励磁されて、各駆動パルス毎に、そ
のパルス幅およびパルス波高値に応じた電磁力を発生さ
せるものである。
FIG. 5 is a block diagram of a conventional electromagnetic pump and its control unit. In FIG. 5, the electromagnetic pump 51 is provided with an electromagnetic coil 52 for generating the electromagnetic force. One terminal of the electromagnetic coil 52 is connected to one output terminal of the pulse output drive circuit 54 via a fixed resistor 53 for adjusting the fluid fuel discharge amount, and the other terminal of the electromagnetic coil 52 is connected to the pulse output drive circuit. The electromagnetic coil 52, which is connected to the other output terminal of the pulse output circuit 54, is repeatedly excited by the intermittent current supplied from the pulse output drive circuit 54 by the drive pulse, and the pulse width and the pulse peak value of each drive pulse are increased. The electromagnetic force is generated according to.

【0004】この電磁ポンプ51におけるプランジャー
の1往復当たりの液体燃料の吐出量は、パルス出力駆動
回路54から出力される駆動パルスのパルス幅に相当し
た通電時間とそのパルス波高値に相当した印加電圧とで
定まる。例えば、駆動パルスの通電時間を長くしたとき
には、プランジャーが復動用のばね圧に抗して充分なス
トローク分だけ往動し、また、印加電圧を高くしたとき
にはプランジャーが勢い良く往動するため、これらの何
れの場合にもその吐出量が多くなる。また、この電磁ポ
ンプ51による単位時間当たりの液体燃料の吐出量は、
駆動パルスの周波数で定まり、この周波数が高いほどそ
の吐出量が多くなる。
The discharge amount of the liquid fuel per one reciprocation of the plunger in the electromagnetic pump 51 is the energization time corresponding to the pulse width of the driving pulse output from the pulse output driving circuit 54 and the application corresponding to the pulse crest value. It is determined by the voltage. For example, when the drive pulse energization time is lengthened, the plunger moves forward by a sufficient stroke against the return spring pressure, and when the applied voltage is increased, the plunger moves forward vigorously. In any of these cases, the ejection amount is large. Further, the discharge amount of the liquid fuel by the electromagnetic pump 51 per unit time is
It is determined by the frequency of the drive pulse, and the higher this frequency, the larger the ejection amount.

【0005】このように、液体燃料の吐出量は、駆動パ
ルスのパルス幅に相当した通電時間とそのパルス波高値
に相当した印加電圧、さらにはその周波数で設定されて
いるが、電磁ポンプ51のポンプ構成部品の寸法精度や
ばね類の付勢力の誤差などがその吐出量に影響してい
る。このため、電磁ポンプ51の組立て後に、その吐出
量を全数検査して固定抵抗器53の抵抗値を調整するこ
とでその許容範囲内に収まるように調整しなければなら
ない。なお、燃焼制御部としては、このパルス出力駆動
回路54の他に、燃焼運転全般に亘る自動制御回路55
が備えられている。
As described above, the discharge amount of the liquid fuel is set by the energization time corresponding to the pulse width of the drive pulse, the applied voltage corresponding to the pulse peak value, and the frequency thereof. The dimensional accuracy of pump components and errors in the biasing force of springs affect the discharge rate. Therefore, after assembling the electromagnetic pump 51, it is necessary to fully inspect the discharge amount and adjust the resistance value of the fixed resistor 53 so that the fixed value falls within the allowable range. In addition to the pulse output drive circuit 54, the combustion control unit includes an automatic control circuit 55 for the entire combustion operation.
Is provided.

【0006】ここで、電磁ポンプ51の固定抵抗器53
による液体燃料の吐出量の調整について、さらに詳しく
説明する。
Here, the fixed resistor 53 of the electromagnetic pump 51.
The adjustment of the discharge amount of the liquid fuel by means of will be described in more detail.

【0007】まず、燃焼器の燃焼量を所定の範囲内に収
めるためには所定の駆動パルスにおいて電磁ポンプ51
の吐出量が所定範囲内に収まっていることが必要であ
る。電磁ポンプ51の単位時間当たりの吐出量は、プラ
ンジャーの1往復当たりの吐出量と駆動パルスの周波数
とで定まっている。また、駆動電源の周波数精度にもよ
るが、通常は、水晶発振子やマイクロコンピュータなど
によって制御が行われており、駆動パルスの周波数には
誤差が殆どない。
First, in order to keep the combustion amount of the combustor within a predetermined range, the electromagnetic pump 51 is driven at a predetermined drive pulse.
It is necessary that the discharge amount of is within a predetermined range. The discharge amount per unit time of the electromagnetic pump 51 is determined by the discharge amount per reciprocation of the plunger and the frequency of the drive pulse. Further, although it depends on the frequency accuracy of the drive power source, the control is usually performed by a crystal oscillator or a microcomputer, and there is almost no error in the frequency of the drive pulse.

【0008】一方、プランジャーの1往復当たりの液体
燃料の吐出量は、駆動パルスの印加電圧と、その通電時
間であるパルス幅とを一定に設定しても、ポンプ構成部
品の寸法精度やばね類の付勢力の僅かな誤差によっても
影響を受けるため、電磁ポンプ51毎にバラツキが生じ
る。この液体燃料の吐出量のバラツキは±15パーセン
トが実情であり、例えば燃焼器の最大燃焼量の±10パ
ーセントの範囲内に収めるためには、電磁ポンプ51以
外の燃焼器部品のバラツキを考慮すると、電磁ポンプ5
1の吐出量のバラツキは±5パーセントの範囲内に収め
る必要がある。
On the other hand, the discharge amount of the liquid fuel per reciprocation of the plunger is fixed even if the applied voltage of the driving pulse and the pulse width which is the energizing time are set to be constant, the dimensional accuracy of the pump component and the spring. Even a slight error in the biasing force of each class affects the electromagnetic pumps 51, so that the electromagnetic pumps 51 vary. The variation of the discharge amount of the liquid fuel is actually ± 15%. For example, in order to keep it within the range of ± 10% of the maximum combustion amount of the combustor, considering the variation of combustor parts other than the electromagnetic pump 51. , Electromagnetic pump 5
The variation of the discharge amount of 1 needs to be within ± 5%.

【0009】そこで、電磁ポンプ51を所定の吐出量以
上になるように製造し、その液体吐出量に応じた抵抗値
の固定抵抗器53を電磁コイル52と直列に接続するこ
とで、その電磁コイル52に印加される印加電圧を下げ
るようにして、電磁ポンプ51の吐出量のバラツキを±
5パーセントの範囲内に収めるようにその液体燃料の吐
出量を調整している。
Therefore, the electromagnetic pump 51 is manufactured to have a predetermined discharge amount or more, and a fixed resistor 53 having a resistance value corresponding to the liquid discharge amount is connected in series with the electromagnetic coil 52, so that the electromagnetic coil By varying the applied voltage applied to 52, the variation in the discharge amount of the electromagnetic pump 51 is controlled by ±.
The discharge amount of the liquid fuel is adjusted so that it falls within the range of 5%.

【0010】このように、液体燃料の吐出量を調整する
ということは、電磁コイル52による電磁力を調整して
プランジャーの1往復当たりの吐出量を調整することで
あり、例えば、固定抵抗器53の抵抗値を小さくして電
磁コイル52への印加電圧を高くしたときには、プラン
ジャーは勢いよく速く往動するため、パルス幅が一定で
あってもその移動量が大きくなってその吐出量が増える
ことになる。また逆に、例えば、固定抵抗器53の抵抗
値を大きくして電磁コイル52への印加電圧を低くした
ときには、プランジャーの勢いは少なく遅く往動するた
め、パルス幅が一定であってもその移動量が少なくなっ
てその吐出量は減少することになる。
As described above, adjusting the discharge amount of the liquid fuel means adjusting the electromagnetic force of the electromagnetic coil 52 to adjust the discharge amount per one reciprocation of the plunger. For example, a fixed resistor. When the resistance value of 53 is decreased and the voltage applied to the electromagnetic coil 52 is increased, the plunger moves forward vigorously and quickly, so that even if the pulse width is constant, the movement amount increases and the ejection amount increases. Will increase. On the contrary, for example, when the resistance value of the fixed resistor 53 is increased and the voltage applied to the electromagnetic coil 52 is decreased, the momentum of the plunger is small and moves backward slowly. The amount of movement is reduced and the amount of discharge is reduced.

【0011】したがって、電磁ポンプ51の固定抵抗器
53による液体燃料の吐出量の調整は、まず、電磁ポン
プ51を固定抵抗器53のない状態で一定の駆動パルス
で所定の吐出量以上となるように製造する。次に、その
電磁ポンプ51を固定抵抗器53のない状態で一定の駆
動パルスを供給してその吐出量を測定する。さらに、こ
の測定された吐出量に対する、予め実験で求められた吐
出量と抵抗値との関係から所定の吐出量の許容範囲内と
なる抵抗値の固定抵抗器53を選定し、上記電磁ポンプ
51の電磁コイル52と直列に接続する。これによっ
て、電磁コイル52に印加される印加電圧は固定抵抗器
53で電圧降下して下がり、電磁ポンプ51毎の吐出量
のバラツキを例えば±5パーセントなどの所定範囲内に
収まるように調整することができる。
Therefore, in adjusting the discharge amount of the liquid fuel by the fixed resistor 53 of the electromagnetic pump 51, first, the discharge amount of the liquid fuel is not less than a predetermined discharge amount with a constant drive pulse without the fixed resistor 53. To manufacture. Next, the electromagnetic pump 51 is supplied with a constant drive pulse without the fixed resistor 53, and the discharge amount is measured. Further, a fixed resistor 53 having a resistance value within a permissible range of the predetermined discharge amount is selected from the relationship between the discharge amount and the resistance value obtained in advance with respect to the measured discharge amount, and the electromagnetic pump 51 is selected. The electromagnetic coil 52 is connected in series. As a result, the applied voltage applied to the electromagnetic coil 52 drops and drops by the fixed resistor 53, and the variation of the discharge amount of each electromagnetic pump 51 is adjusted to fall within a predetermined range such as ± 5%. You can

【0012】次に、燃焼器における液体燃料の燃焼量制
御について詳しく説明する。この燃焼量制御、即ち、電
磁ポンプ51の液体燃料の吐出量を制御する方法には、
以下に示すような3通りの方法がある。
Next, the control of the combustion amount of the liquid fuel in the combustor will be described in detail. This combustion amount control, that is, the method of controlling the discharge amount of the liquid fuel of the electromagnetic pump 51, includes:
There are three methods as shown below.

【0013】(1)駆動パルスの周波数を変化させる方
法(図6参照) (2)駆動パルスの通電時間であるパルス幅を変化させ
る方法(図7参照) (3)上記(1)と(2)の方法を併用する方法(図8
参照) 上記(1)の方法では、図6に示すように、駆動パルス
のパルス幅を一定(図6ではパルス幅5.6msec)
にして駆動パルスの周波数成分だけを変化させることに
よって電磁ポンプ51の吐出量を制御するもので、その
吐出量は、通常使用されている4〜30Hzの周波数範
囲内でほぼ周波数に正比例している。例えば、駆動パル
スの周波数が20Hzのときに電磁ポンプ51の吐出量
が5(ml/min)程度であり、周波数が20Hzよ
りも高い場合にも低い場合にもその特性ラインの傾きは
一定である。ところが、30Hz以上の周波数領域でそ
の吐出量は飽和しており、その特性ラインの傾きは少な
くなる。
(1) Method of changing frequency of drive pulse (see FIG. 6) (2) Method of changing pulse width which is energization time of drive pulse (see FIG. 7) (3) Above (1) and (2) ) Method together (Fig. 8
In the method (1) above, as shown in FIG. 6, the pulse width of the drive pulse is constant (in FIG. 6, the pulse width is 5.6 msec).
The discharge amount of the electromagnetic pump 51 is controlled by changing only the frequency component of the drive pulse in the above manner, and the discharge amount is almost directly proportional to the frequency within the frequency range of 4 to 30 Hz which is usually used. . For example, the discharge rate of the electromagnetic pump 51 is about 5 (ml / min) when the frequency of the drive pulse is 20 Hz, and the slope of the characteristic line is constant regardless of whether the frequency is higher or lower than 20 Hz. . However, the ejection amount is saturated in the frequency region of 30 Hz or higher, and the inclination of the characteristic line is small.

【0014】また、上記(2)の方法では、図7に示す
ように、駆動パルスの周波数を一定(図6では周波数1
0Hz)にして駆動パルスのパルス幅だけを変化させる
ことによって電磁ポンプ51の液体燃料の吐出量を制御
するもので、例えば、駆動パルスのパルス幅が10ms
ecのときに電磁ポンプ51の吐出量は5(ml/mi
n)程度であり、パルス幅を長くしたときにはプランジ
ャーが復動用のばね圧に抗して長い時間往動し、1往復
のプランジャーのストロークが長くなってその吐出量が
増えることになる。また逆に、パルス幅を短くしたとき
にはプランジャーが復動用のばね圧に抗して短い時間往
動し、1往復のプランジャーのストロークが短くなって
その吐出量が減少することになる。
In the method (2), as shown in FIG. 7, the frequency of the drive pulse is constant (frequency 1 in FIG. 6).
The discharge amount of the liquid fuel of the electromagnetic pump 51 is controlled by changing only the pulse width of the drive pulse to 0 Hz). For example, the pulse width of the drive pulse is 10 ms.
When ec, the discharge amount of the electromagnetic pump 51 is 5 (ml / mi
n), and when the pulse width is lengthened, the plunger moves forward for a long period of time against the spring pressure for return movement, and the stroke of the plunger for one reciprocation becomes long and the discharge amount increases. On the contrary, when the pulse width is shortened, the plunger moves forward for a short period of time against the return spring pressure, so that the stroke of the plunger for one reciprocation is shortened and the discharge amount thereof is reduced.

【0015】この場合、プランジャーの動きは、印加電
圧に対する電流の遅れとその位置による電磁力の大き
さ、さらにスプリングの撓み量に比例した反発力および
流体の負荷との関係で加速度的に移動するため、パルス
幅とその吐出量との関係は図7の特性ラインA,Bのよ
うに3次曲線に近いものとなっている。これらの特性ラ
インA,Bは電磁ポンプ51毎に異なっている様子を示
している。
In this case, the movement of the plunger is accelerated due to the delay of the current with respect to the applied voltage, the magnitude of the electromagnetic force due to the position, the repulsive force proportional to the bending amount of the spring, and the fluid load. Therefore, the relationship between the pulse width and its ejection amount is close to a cubic curve as indicated by characteristic lines A and B in FIG. These characteristic lines A and B show different characteristics for each electromagnetic pump 51.

【0016】さらに、上記(3)の方法では、上記
(1)の方法のように最大燃焼量から最小燃焼量までを
周波数のみで変化させると、駆動パルスの周波数の高い
領域では電磁ポンプ51の駆動音が高くなって聞き辛
く、また、流量安定性が悪くなるという問題があり、ま
た、周波数の低い領域では、電磁ポンプ51の駆動がパ
ルス駆動であるため液体燃料の脈流による燃焼異常が生
じ易くなるという問題があったが、その吐出量の周波数
制御とパルス幅制御とを併せることで、液体燃料の吐出
量の可変範囲における周波数の可変範囲を狭めることが
できて、上記各問題を解決することができる。したがっ
て、図8に示すように、駆動パルスの周波数が10.5
Hzまではパルス幅が3.5msecの特性ラインで液
体燃料の吐出量を制御し、また、駆動パルスの周波数が
10.5Hzを超えると、パルス幅が7.4msecの
より傾斜の大きい特性ラインで液体燃料の吐出量を制御
する。これらの特性ラインが変わる10.5Hzの周波
数では、液体燃料の吐出量を連続的に変化させるため
に、同一の吐出量となるように一旦7.5Hzの周波数
まで下げている。この場合にも、30Hz以上の周波数
になると、上記(1)の方法と同様に、液体燃料の吐出
量は飽和することになる。
Further, in the above method (3), when the maximum combustion amount to the minimum combustion amount is changed only by the frequency as in the method (1), the electromagnetic pump 51 of the drive pulse has a high frequency range. There is a problem that the driving sound becomes high and it is hard to hear, and the flow rate stability deteriorates. Further, in the low frequency region, since the driving of the electromagnetic pump 51 is pulse driving, combustion abnormality due to the pulsating flow of liquid fuel is generated. Although there is a problem that it easily occurs, by combining the frequency control of the discharge amount and the pulse width control, the variable range of the frequency in the variable range of the discharge amount of the liquid fuel can be narrowed, and each of the above problems is solved. Can be resolved. Therefore, as shown in FIG. 8, the frequency of the drive pulse is 10.5.
Up to Hz, the discharge amount of the liquid fuel is controlled with a characteristic line with a pulse width of 3.5 msec, and when the frequency of the driving pulse exceeds 10.5 Hz, a characteristic line with a larger slope with a pulse width of 7.4 msec is used. Controls the discharge amount of liquid fuel. At the frequency of 10.5 Hz where these characteristic lines change, in order to continuously change the discharge amount of the liquid fuel, the frequency is once lowered to 7.5 Hz so that the discharge amount becomes the same. Also in this case, when the frequency becomes 30 Hz or higher, the discharge amount of the liquid fuel becomes saturated as in the method (1).

【0017】[0017]

【発明が解決しようとする課題】上記したような固定抵
抗器53による液体燃料の吐出量調整方法で調整された
電磁ポンプ51の吐出量は、さらに燃焼量を制御するた
め上記(1)〜(3)の方法により駆動パルスの周波数
やパルス幅を制御して変化させているが、そのうち
(1)の駆動パルスの周波数を制御する方法において
は、上記したように電磁ポンプ51の駆動音が変化する
こと、流量が不安定であること、液体燃料の脈流で燃焼
異常が生じ易くなることなどの問題があった。
The discharge amount of the electromagnetic pump 51 adjusted by the liquid fuel discharge amount adjusting method using the fixed resistor 53 as described above is further controlled in order to further control the combustion amount. The frequency and pulse width of the drive pulse are controlled and changed by the method 3), but in the method (1) of controlling the frequency of the drive pulse, the drive sound of the electromagnetic pump 51 changes as described above. However, there are problems that the flow rate is unstable, the combustion abnormality easily occurs due to the pulsating flow of the liquid fuel, and the like.

【0018】つまり、駆動パルスの周波数が30Hz以
上の高い領域では高周波音となって聞き辛く、かつ流量
が不安定でその飽和部分の特性は個々の電磁ポンプ51
で異なっている。この特性の飽和部分を含むような周波
数範囲で制御するような場合には、最大燃焼量で固定抵
抗を選択して調整しても、最小燃焼方向に周波数を少な
くするように吐出量の制御を行うと、その特性にバラツ
キが発生し最小燃焼時の許容範囲内に液体燃料の吐出量
が収まらないという問題も有していた。また、温度制御
において燃焼を消してしまうと臭いの問題などが残るた
め、最小燃焼量に対応する液体燃料の吐出量を維持する
必要があるが、駆動パルスの周波数が例えば4Hzに対
応する微小吐出量の最小燃焼時には液体燃料の脈流によ
る燃焼異常が発生するという問題も有していた。
That is, in a high region where the drive pulse frequency is higher than 30 Hz, high-frequency sound becomes difficult to hear, and the flow rate is unstable, and the characteristics of the saturated portion are individual electromagnetic pumps 51.
Is different. When controlling in a frequency range that includes the saturated part of this characteristic, control the discharge amount to reduce the frequency in the minimum combustion direction even if you select and adjust the fixed resistance with the maximum combustion amount. If this is done, there is also a problem in that the characteristics thereof will vary, and the discharge amount of the liquid fuel will not fall within the allowable range at the time of minimum combustion. Further, if the combustion is extinguished in the temperature control, the problem of the odor remains, so it is necessary to maintain the discharge amount of the liquid fuel corresponding to the minimum combustion amount, but the minute discharge corresponding to the drive pulse frequency of 4 Hz, for example. There is also a problem that abnormal combustion occurs due to the pulsating flow of liquid fuel at the time of minimum amount combustion.

【0019】また、(2)のパルス幅を制御する方法
や、(1)の方法の問題点を解決した(3)の方法にお
いては、上記液体燃料の吐出量のバラツキと同様にパル
ス幅を変化させたときの吐出量の変化特性が個々の電磁
ポンプ51でバラツキがあるため、上記最大燃焼量で所
定抵抗値の固定抵抗器53を選択して吐出量を所定範囲
内に調整した場合、最小燃焼方向でパルス幅を短くして
行く制御を行うと、その特性のバラツキにより最大燃焼
でのバラツキが所定範囲内に入っていても、最小燃焼で
のバラツキが最大燃焼でのバラツキよりもそのバラツキ
の範囲が大きく、最小燃焼でのバラツキが所定範囲内に
入らなくなる場合が発生するという問題を有していた。
また逆に、上記最小燃焼量で所定抵抗値の固定抵抗器5
3を選択して吐出量を所定範囲内に調整した場合、最大
燃焼方向でパルス幅を長くして行く制御を行うと、その
特性のバラツキにより最小燃焼でのバラツキが所定範囲
内に入っていても、最大燃焼でのバラツキが最小燃焼で
のバラツキよりもそのバラツキの範囲が大きく、最大燃
焼でのバラツキが所定範囲内に入らなくなる場合が発生
するという問題を有していた。
Further, in the method (2) of controlling the pulse width and the method (3) of solving the problem of the method (1), the pulse width is set in the same manner as the variation of the discharge amount of the liquid fuel. Since the variation characteristic of the discharge amount when changing is different among the individual electromagnetic pumps 51, when the fixed resistor 53 having a predetermined resistance value with the above maximum combustion amount is selected and the discharge amount is adjusted within a predetermined range, If control is performed by shortening the pulse width in the minimum combustion direction, even if the variation at the maximum combustion is within the predetermined range due to the variation in the characteristics, the variation at the minimum combustion is more than that at the maximum combustion. There is a problem that the range of variation is large and the variation at the minimum combustion may not fall within the predetermined range.
On the contrary, a fixed resistor 5 having a predetermined resistance value with the above-mentioned minimum combustion amount.
When 3 is selected and the discharge amount is adjusted within the predetermined range, if the control is performed by increasing the pulse width in the maximum combustion direction, the variation at the minimum combustion is within the predetermined range due to the variation in the characteristics. However, the variation in the maximum combustion has a larger variation range than the variation in the minimum combustion, and the variation in the maximum combustion may not fall within the predetermined range.

【0020】このことは、最小燃焼量および最大燃焼量
付近での電磁ポンプ51の液体燃料の吐出量が所定の燃
焼量と差が生じることによる燃焼空気との混合比のずれ
による赤火や不完全燃焼などの原因となる。これらの赤
火や不完全燃焼などの場合には液体燃料の量に対して熱
量が少なくなって熱出力効率が悪くなる。
This means that the amount of liquid fuel discharged from the electromagnetic pump 51 near the minimum combustion amount and the maximum combustion amount is different from the predetermined combustion amount, which causes a difference in the mixing ratio with the combustion air and a red fire or a non-fire. It may cause complete combustion. In the case of such a red fire or incomplete combustion, the amount of heat is small with respect to the amount of liquid fuel, and the heat output efficiency deteriorates.

【0021】本発明は、上記問題を解決するもので、最
大燃焼時および最小燃焼時の両方において、より正確な
液体燃料の吐出量で燃焼制御させることができて燃焼効
率の良い電磁ポンプおよび液体燃料供給装置を提供する
ことを目的とする。
The present invention solves the above-mentioned problems. In both the maximum combustion and the minimum combustion, it is possible to control the combustion with a more accurate discharge amount of the liquid fuel, and the electromagnetic pump and the liquid have good combustion efficiency. It is an object to provide a fuel supply device.

【0022】[0022]

【課題を解決するための手段】本発明の液体燃料供給装
置は、供給される駆動パルスのパルス幅、パルス周波数
およびパルス波高値に応じて液体燃料の吐出量が変化す
る液体燃料供給装置において、前記駆動パルスの所定の
パルス幅またはパルス周波数で、前記駆動パルスのパル
ス波高値を切り換えるように制御する駆動制御手段が設
けられていることを特徴とする。
A liquid fuel supply apparatus according to the present invention is a liquid fuel supply apparatus in which the discharge amount of liquid fuel changes according to the pulse width, pulse frequency and pulse crest value of a drive pulse supplied, Drive control means for controlling the pulse crest value of the drive pulse to be switched with a predetermined pulse width or pulse frequency of the drive pulse is provided.

【0023】この構成により、パルス幅またはパルス周
波数を変化させたときの液体燃料の吐出量の変化特性が
個々の液体燃料供給装置でバラツキがあっても、少なく
とも液体燃料の最大燃焼量と最小燃焼量を所定吐出量範
囲内に調整するように、供給される駆動パルスの波高値
を設定し、駆動パルスの所定のパルス幅またはパルス周
波数で、パルス波高値を切り換えるようにしているの
で、少なくとも最大燃焼および最小燃焼での吐出量のバ
ラツキが所定吐出量範囲内となり、最大燃焼時および最
小燃焼時の両方およびそれらの間において、より正確な
液体燃料の吐出量で燃焼制御させることが可能となる。
したがって、最小燃焼時および最大燃焼時、これらの間
で燃焼空気との混合比のずれによる赤火や不完全燃焼な
どが防止され、燃焼効率のよい液体燃料供給装置とな
る。
With this configuration, even if the variation characteristic of the discharge amount of the liquid fuel when the pulse width or the pulse frequency is changed varies among the individual liquid fuel supply devices, at least the maximum combustion amount and the minimum combustion amount of the liquid fuel are obtained. The crest value of the supplied drive pulse is set so that the amount is adjusted within the predetermined ejection amount range, and the pulse crest value is switched at a predetermined pulse width or pulse frequency of the drive pulse. The variation of the discharge amount in the combustion and the minimum combustion is within the predetermined discharge amount range, and it becomes possible to perform the combustion control with a more accurate discharge amount of the liquid fuel both during the maximum combustion and during the minimum combustion and between them. .
Therefore, at the time of the minimum combustion and the maximum combustion, red fire and incomplete combustion due to the difference in the mixing ratio with the combustion air between them are prevented, and the liquid fuel supply device with good combustion efficiency is provided.

【0024】また、好ましくは、本発明の液体燃料供給
装置における駆動制御手段は、複数の抵抗部材と、駆動
パルスの所定のパルス幅またはパルス周波数で前記複数
の抵抗部材のうちの所定の抵抗部材を選択し、この選択
された所定の抵抗部材を介して前記駆動パルスを供給す
るパルス出力手段とを有することを特徴とする。
Further, preferably, the drive control means in the liquid fuel supply system of the present invention comprises a plurality of resistance members and a predetermined resistance member of the plurality of resistance members at a predetermined pulse width or pulse frequency of the drive pulse. And pulse output means for supplying the drive pulse via the selected predetermined resistance member.

【0025】つまり、本発明の電磁ポンプは、電磁コイ
ルに供給される駆動パルスのパルス幅およびパルス周波
数、パルス波高値に応じて液体燃料の吐出量が変化する
電磁ポンプにおいて、前記駆動パルスの波高値切換用の
抵抗部材が前記電磁コイルに複数個並列接続されて配設
されていることを特徴とする。
That is, the electromagnetic pump of the present invention is an electromagnetic pump in which the discharge amount of liquid fuel changes according to the pulse width and pulse frequency of the drive pulse supplied to the electromagnetic coil, and the pulse crest value. A plurality of high-value switching resistance members are arranged in parallel with the electromagnetic coil.

【0026】また、好ましくは、本発明の液体燃料供給
装置は、前記電磁ポンプと、この電磁ポンプの電磁コイ
ルに供給される駆動パルスの所定のパルス幅またはパル
ス周波数で、前記複数の抵抗部材のうちの所定の抵抗部
材を選択し、この選択された所定の抵抗部材を介して前
記駆動パルスを前記電磁コイルに供給するパルス出力手
段とを有することを特徴とする。
Further, preferably, in the liquid fuel supply system of the present invention, the plurality of resistance members are provided with a predetermined pulse width or pulse frequency of a drive pulse supplied to the electromagnetic pump and an electromagnetic coil of the electromagnetic pump. A pulse output means for selecting a predetermined resistance member from among the selected resistance members and supplying the drive pulse to the electromagnetic coil via the selected predetermined resistance member.

【0027】この構成により、例えば最大燃焼量で所定
抵抗値の抵抗部材を選択して吐出量を所定範囲内に調整
すると共に、最小燃焼量で所定抵抗値の抵抗部材を選択
して吐出量を所定範囲内に調整するようにすれば、少な
くとも最大燃焼時および最小燃焼時での吐出量のバラツ
キを所定範囲内にそれぞれ容易に納めることが可能とな
る。
With this configuration, for example, a resistance member having a predetermined resistance value at the maximum combustion amount is selected to adjust the discharge amount within a predetermined range, and a resistance member having a predetermined resistance value at the minimum combustion amount is selected to change the discharge amount. By adjusting the amount within the predetermined range, it is possible to easily set the variation in the discharge amount at least during the maximum combustion and the minimum combustion within the predetermined range.

【0028】[0028]

【発明の実施の形態】以下、本発明に係る液体燃料供給
装置の実施形態について図面を参照しながら説明する。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a liquid fuel supply apparatus according to the present invention will be described below with reference to the drawings.

【0029】図1は本発明の一実施形態を示す電磁ポン
プおよびその制御部の構成図である。
FIG. 1 is a block diagram of an electromagnetic pump and its control section showing an embodiment of the present invention.

【0030】図1において、この電磁ポンプ11には、
電磁力を発生させるための電磁コイル12が配設されて
いる。この電磁コイル12の一方端子には、流体燃料吐
出量調整用の固定抵抗器13,14の一方端が接続さ
れ、これらの固定抵抗器13,14の他方端はそれぞれ
パルス出力駆動回路15の両出力端子P1,P2にそれぞ
れ接続されている。これらの両出力端子P1,P2は、リ
レー接点や電子スイッチなどのスイッチ接点を介して出
力端を2系統に分岐した先端部に設けられている。ま
た、電磁コイル12の他方端子はパルス出力駆動回路1
5のコモン端子に接続されており、電磁コイル12は、
固定抵抗器13または固定抵抗器14を介して、パルス
出力駆動回路15からの駆動パルスによる断続電流によ
って繰り返し励磁されて、各駆動パルス毎に、そのパル
ス周波数、パルス幅(通電時間)およびパルス波高値
(印加電圧)に応じた電磁力を発生させるものである。
このときの固定抵抗器13は、最大燃焼時の吐出量が所
定範囲内になるようにその抵抗値が選定され、また、固
定抵抗器14は、最小燃焼時の吐出量が所定範囲内にな
るようにその抵抗値が選定されており、パルス出力駆動
回路15は駆動パルスのパルス幅に応じて固定抵抗器1
3,14の何れかに切り換えて液体燃料の吐出量制御が
なされている。これらの固定抵抗器13,14およびパ
ルス出力駆動回路15で駆動制御手段が構成されてお
り、駆動パルスの所定パルス幅またはパルス周波数で、
この駆動パルスのパルス波高値(印加電圧)を、固定抵
抗器13または固定抵抗器14を介することで切り換え
るように制御している。この切り換えるときの所定パル
ス幅は、液体燃料の吐出量が制御される最大燃焼時と最
小燃焼時の間のパルス幅である。
In FIG. 1, the electromagnetic pump 11 includes:
An electromagnetic coil 12 for generating an electromagnetic force is provided. One ends of the fixed resistors 13 and 14 for adjusting the fluid fuel discharge amount are connected to one terminal of the electromagnetic coil 12, and the other ends of the fixed resistors 13 and 14 are connected to both ends of the pulse output drive circuit 15, respectively. The output terminals P 1 and P 2 are respectively connected. Both of these output terminals P 1 and P 2 are provided at the tip end where the output end is branched into two systems via a switch contact such as a relay contact or an electronic switch. The other terminal of the electromagnetic coil 12 is connected to the pulse output drive circuit 1
5 is connected to the common terminal, and the electromagnetic coil 12 is
The pulse frequency, pulse width (energization time), and pulse wave of each drive pulse are repeatedly excited by the intermittent current by the drive pulse from the pulse output drive circuit 15 via the fixed resistor 13 or the fixed resistor 14. The electromagnetic force is generated according to a high value (applied voltage).
The resistance value of the fixed resistor 13 at this time is selected so that the discharge amount at the time of maximum combustion is within a predetermined range, and the fixed resistor 14 has the discharge amount at the time of minimum combustion within the predetermined range. The resistance value of the fixed resistor 1 is selected according to the pulse width of the driving pulse.
The discharge amount of the liquid fuel is controlled by switching to any one of 3 and 14. These fixed resistors 13 and 14 and the pulse output drive circuit 15 constitute drive control means, and have a predetermined pulse width or pulse frequency of the drive pulse.
The pulse crest value (applied voltage) of this drive pulse is controlled so as to be switched via the fixed resistor 13 or the fixed resistor 14. The predetermined pulse width at the time of switching is a pulse width between the maximum combustion and the minimum combustion in which the discharge amount of the liquid fuel is controlled.

【0031】また、燃焼制御部としては、このパルス出
力駆動回路15の他に、燃焼運転全般に亘って制御する
自動制御回路16が備えられており、例えば送風ファン
の吸い込み口などに配設された温度センサによって現在
の温度が監視され、この温度センサで検知されている現
在温度と目標温度とが比較され、これらの温度差に応じ
て、パルス出力駆動回路15に対して駆動パルスのパル
ス幅を制御させるようになっている。このパルス出力駆
動回路15からの駆動パルスで駆動制御される電磁ポン
プにより、多段階に液体燃料の吐出量が制御されて最大
燃焼と最小燃焼との間を燃焼制御するようになってい
る。
Further, as the combustion control unit, in addition to the pulse output drive circuit 15, an automatic control circuit 16 for controlling the entire combustion operation is provided, and is provided, for example, at the suction port of a blower fan. The current temperature is monitored by the temperature sensor, the current temperature detected by the temperature sensor is compared with the target temperature, and the pulse width of the drive pulse is supplied to the pulse output drive circuit 15 according to the temperature difference. Is controlled. The electromagnetic pump, which is drive-controlled by the drive pulse from the pulse output drive circuit 15, controls the discharge amount of the liquid fuel in multiple stages to control combustion between maximum combustion and minimum combustion.

【0032】図2は図1の電磁ポンプの構成を示す縦断
面図であり、図3は図1の電磁ポンプの構成を示す平面
図である。
FIG. 2 is a vertical sectional view showing the structure of the electromagnetic pump of FIG. 1, and FIG. 3 is a plan view showing the structure of the electromagnetic pump of FIG.

【0033】図2および図3において、この電磁ポンプ
11は、シリンダ21内にフリーピストン状のプランジ
ャー22がばね23,24で所定位置に釣り合って配設
されている。このプランジャー22内には逆止弁25が
ばね26で軽く付勢された状態で開口部27を開閉自在
に配設されている。また、吐出口28側にも、逆止弁2
9がばね30で軽く付勢された状態でその開口部31を
開閉自在に配設されている。この電磁ポンプ11のシリ
ンダ21の外周部にはコイルボビン32が配設されてお
り、そのコイルボビン32に電磁コイル12が巻回され
ている。この電磁コイル12の両端12a,12bはそ
れぞれ、コイルボビン32の上部に配設された端子板3
4の各端子35,36にそれぞれ接続されている。この
端子板34には端子35,36の他に端子37,38が
設けられており、端子35と端子37間に固定抵抗器1
3を、端子35と端子38間に固定抵抗器14を接続す
ると共に、これらの端子36〜38をそれぞれパルス出
力駆動回路15の各出力端にそれぞれ接続している。
2 and 3, in the electromagnetic pump 11, a free piston-shaped plunger 22 is arranged in a cylinder 21 by springs 23 and 24 in balance with each other at predetermined positions. A check valve 25 is provided in the plunger 22 so as to open and close the opening 27 while being lightly biased by a spring 26. The check valve 2 is also provided on the discharge port 28 side.
An opening 31 is provided so that the opening 9 can be opened and closed while the spring 9 is lightly biased by the spring 30. A coil bobbin 32 is arranged on the outer peripheral portion of the cylinder 21 of the electromagnetic pump 11, and the electromagnetic coil 12 is wound around the coil bobbin 32. Both ends 12a and 12b of the electromagnetic coil 12 are respectively connected to the terminal board 3 arranged above the coil bobbin 32.
4 terminals 35 and 36, respectively. The terminal plate 34 is provided with terminals 37 and 38 in addition to the terminals 35 and 36, and the fixed resistor 1 is provided between the terminals 35 and 37.
3, the fixed resistor 14 is connected between the terminal 35 and the terminal 38, and these terminals 36 to 38 are connected to the output terminals of the pulse output drive circuit 15, respectively.

【0034】上記構成により、電磁ポンプ11の固定抵
抗器13,14による液体燃料の吐出量調整は、まず、
電磁ポンプ11を固定抵抗器13,14のない状態で一
定の駆動パルスで所定の吐出量以上となるように製造す
る。次に、その電磁ポンプ11の電磁コイル12に固定
抵抗器13,14が接続されていない状態で、最大燃焼
時および最小燃焼時に供給される所定の駆動パルスを電
磁コイル12にそれぞれ供給してその各吐出量をそれぞ
れ測定する。所定の駆動パルスとは、例えば周波数10
Hzで最大燃焼時の液体燃料の吐出量に対応するパルス
幅を10msecとし、また、最小燃焼時の液体燃料の
吐出量に対応するパルス幅を5msecとしている。
With the above-mentioned structure, the discharge amount of the liquid fuel is adjusted by the fixed resistors 13 and 14 of the electromagnetic pump 11 first.
The electromagnetic pump 11 is manufactured so as to have a predetermined discharge amount or more with a constant drive pulse without the fixed resistors 13 and 14. Next, in a state where the fixed resistors 13 and 14 are not connected to the electromagnetic coil 12 of the electromagnetic pump 11, predetermined drive pulses supplied at the time of maximum combustion and at the time of minimum combustion are supplied to the electromagnetic coil 12, respectively. Each discharge amount is measured. The predetermined drive pulse is, for example, frequency 10
The pulse width corresponding to the discharge amount of the liquid fuel at the time of maximum combustion at 10 Hz is 10 msec, and the pulse width corresponding to the discharge amount of the liquid fuel at the time of minimum combustion is 5 msec.

【0035】さらに、これらの測定された各吐出量に対
する、予め実験で求められた吐出量と抵抗値との関係か
ら所定の吐出量の許容範囲内となる抵抗値の固定抵抗器
13,14をそれぞれ選定し、上記電磁ポンプ11の電
磁コイル12と直列にそれぞれ接続する。
Further, the fixed resistors 13 and 14 having a resistance value within a permissible range of a predetermined discharge amount are set based on the relationship between the discharge amount and the resistance value obtained in advance for each measured discharge amount. Each is selected and connected in series with the electromagnetic coil 12 of the electromagnetic pump 11.

【0036】次に、燃焼器における液体燃料の燃焼量制
御については、燃焼時には、電磁ポンプ11の電磁コイ
ル12に固定抵抗器13,14の何れかを介してパルス
出力駆動回路15から所定パルス幅の駆動パルスが入力
されて通電状態となる。この駆動パルスが供給される電
磁コイル12で発生する電磁力で、プランジャー22を
ばね23の付勢力に抗して吐出口28側に移動させる。
この往動時に、プランジャー22内の逆止弁25は加圧
された流体燃料の圧力で閉じたままであるが、吐出口2
8側の逆止弁29を流体燃料の圧力で押し開かせながら
流体燃料を吐出口28より吐出させることができる。
Next, regarding the control of the combustion amount of the liquid fuel in the combustor, at the time of combustion, a predetermined pulse width is applied from the pulse output drive circuit 15 to the electromagnetic coil 12 of the electromagnetic pump 11 via one of the fixed resistors 13 and 14. The drive pulse of is input to enter the energized state. The electromagnetic force generated by the electromagnetic coil 12 to which the drive pulse is supplied moves the plunger 22 to the ejection port 28 side against the biasing force of the spring 23.
During this forward movement, the check valve 25 in the plunger 22 remains closed by the pressure of the pressurized fluid fuel, but the discharge port 2
The fluid fuel can be discharged from the discharge port 28 while the check valve 29 on the 8th side is pushed open by the pressure of the fluid fuel.

【0037】その後、電磁コイル12に駆動パルスが通
電されていない状態となり、このときは電磁力が働かな
いので、プランジャー22はばね23の付勢力で復動し
て吐出口28側とは反対側に移動することになる。この
復動時に、プランジャー22内の逆止弁25はその内部
の流体燃料が減圧することで開いて、その開口部を介し
て液体燃料が内部に流入することになると共に、吐出口
28側の逆止弁29は閉じられることになる。以上の動
作を繰り返すことによって液体燃料の燃焼量制御がなさ
れている。
After that, the driving pulse is not applied to the electromagnetic coil 12. At this time, since the electromagnetic force does not work, the plunger 22 returns by the urging force of the spring 23 and is opposite to the discharge port 28 side. Will be moved to the side. At the time of this return movement, the check valve 25 in the plunger 22 is opened by decompressing the fluid fuel inside, and the liquid fuel flows into the inside through the opening portion, and at the same time as the discharge port 28 side. The check valve 29 will be closed. By repeating the above operation, the combustion amount of the liquid fuel is controlled.

【0038】このとき、図4に示すように、最大燃焼時
の吐出量に対応するパルス幅10msecにおいて、基
準となる特性ラインを特性ラインAとすると、電磁コイ
ル12に印加される印加電圧は固定抵抗器13で最適に
電圧降下して適度に下がることで、最大燃焼時の電磁ポ
ンプ11毎の吐出量のバラツキが特性ラインBのように
例えば±5パーセントなどの所定範囲内に収まるように
なる。また、液体燃料の吐出量が最大燃焼量から最小燃
焼量の方向に変化するとき、パルス出力駆動回路15
は、駆動パルスのパルス幅に応じた最適な位置(本実施
形態では最大燃焼量と最小燃焼量の間の中央位置)でそ
の出力端を固定抵抗器13から固定抵抗器14に切り換
える。この切り換え制御で、最小燃焼時においても、電
磁コイル12に印加される印加電圧は固定抵抗器14で
最適に電圧降下して適度に下がることで、最小燃焼時の
電磁ポンプ11毎の吐出量のバラツキも特性ラインCの
ように例えば±5パーセントなどの所定範囲内に収まる
ようになる。
At this time, as shown in FIG. 4, when the reference characteristic line is the characteristic line A in the pulse width of 10 msec corresponding to the discharge amount at the time of maximum combustion, the applied voltage applied to the electromagnetic coil 12 is fixed. By optimally dropping the voltage by the resistor 13 and appropriately lowering it, the variation in the discharge amount of each electromagnetic pump 11 at the time of maximum combustion comes to fall within a predetermined range such as ± 5% as indicated by the characteristic line B. . Further, when the discharge amount of the liquid fuel changes from the maximum combustion amount to the minimum combustion amount, the pulse output drive circuit 15
Switches the output terminal from the fixed resistor 13 to the fixed resistor 14 at an optimum position (a central position between the maximum combustion amount and the minimum combustion amount in this embodiment) according to the pulse width of the drive pulse. With this switching control, even during the minimum combustion, the applied voltage applied to the electromagnetic coil 12 drops optimally by the fixed resistor 14 and drops appropriately, so that the discharge amount of each electromagnetic pump 11 during the minimum combustion can be reduced. The variation also falls within a predetermined range such as ± 5% like the characteristic line C.

【0039】したがって、上記液体燃料の吐出量のバラ
ツキと同様にパルス幅を変化させたときの吐出量の変化
特性が個々の電磁ポンプ11でバラツキがあっても、最
大燃焼量で所定抵抗値の固定抵抗器13を選択して吐出
量を所定範囲内に調整し、かつ最小燃焼量で所定抵抗値
の固定抵抗器14を選択して吐出量を所定範囲内に調整
するので、最大燃焼および最小燃焼での吐出量のバラツ
キを所定範囲内に入れることができて、最大燃焼時およ
び最小燃焼時の両方およびそれらの間において、より正
確な液体燃料の吐出量で燃焼制御させることができる。
これによって、特に最小燃焼量および最大燃焼量付近で
燃焼空気との混合比のずれによる赤火や不完全燃焼など
を防止して、燃焼効率のよい液体燃料供給装置としての
電磁ポンプ11およびパルス出力駆動回路15を得るこ
とができる。
Therefore, even if the variation characteristic of the discharge amount when the pulse width is changed is different among the individual electromagnetic pumps 11 like the above-described variation of the discharge amount of the liquid fuel, even if the individual combustion pump 11 has the maximum combustion amount, the predetermined resistance value of Since the fixed resistor 13 is selected to adjust the discharge amount within a predetermined range, and the fixed resistor 14 having a predetermined resistance value with the minimum combustion amount is selected to adjust the discharge amount within the predetermined range, maximum combustion and minimum It is possible to put the variation in the discharge amount in combustion within a predetermined range, and it is possible to perform the combustion control with a more accurate discharge amount of the liquid fuel both during the maximum combustion and during the minimum combustion and between them.
As a result, in particular near the minimum combustion amount and the maximum combustion amount, it is possible to prevent red fire and incomplete combustion due to the deviation of the mixing ratio with the combustion air, and the electromagnetic pump 11 and the pulse output as the liquid fuel supply device with good combustion efficiency. The drive circuit 15 can be obtained.

【0040】なお、本実施形態では、最大燃焼時および
最小燃焼時に設定した2個の固定抵抗器13,14を電
磁コイル12に並列に接続し、パルス出力駆動回路15
が、駆動パルスのパルス幅に応じてその出力端を固定抵
抗器13,14の何れかに切り換え制御するように構成
したが、3個の固定抵抗器を電磁コイル12に並列に接
続し、最大燃焼時および最小燃焼時の他、その間の燃焼
時にも所定範囲内に吐出量が入るように、パルス出力駆
動回路が、駆動パルスのパルス幅に応じてその出力端を
各固定抵抗器の何れかに切り換え制御するようにしても
よい。また、2個や3個の固定抵抗器に限らず、それ以
上の複数個の固定抵抗器を電磁コイル12に並列に接続
し、最大燃焼時と最小燃焼時の間の各燃焼時にも基準と
なる特性ラインAに沿うように、パルス出力駆動回路
が、駆動パルスのパルス幅に応じてその出力端を各固定
抵抗器の何れかに切り換えるように制御するようにして
もよい。この場合には、より正確な吐出量制御となっ
て、より燃焼効率のよい快適な液体燃料供給装置が得ら
れることになる。
In this embodiment, the two fixed resistors 13 and 14 set at the time of maximum combustion and at the time of minimum combustion are connected in parallel to the electromagnetic coil 12, and the pulse output drive circuit 15 is connected.
Is configured to switch and control the output end of the fixed resistor 13 or 14 in accordance with the pulse width of the driving pulse. However, three fixed resistors are connected in parallel to the electromagnetic coil 12, In order to keep the discharge amount within the specified range during combustion and minimum combustion, as well as during combustion during that time, the pulse output drive circuit sets the output end to one of the fixed resistors according to the pulse width of the drive pulse. Alternatively, the switching control may be performed. Further, not only two or three fixed resistors but also a plurality of fixed resistors connected in parallel to the electromagnetic coil 12 are used as a reference even in each combustion between the maximum combustion time and the minimum combustion time. Along the line A, the pulse output drive circuit may be controlled to switch its output end to any of the fixed resistors according to the pulse width of the drive pulse. In this case, the discharge amount can be controlled more accurately, and a comfortable liquid fuel supply device with higher combustion efficiency can be obtained.

【0041】また、本実施形態では、駆動パルスのパル
ス幅に応じてその出力端を固定抵抗器13,14の何れ
かに切り換え制御するように構成したが、駆動パルスの
パルス周波数に応じてその出力端を固定抵抗器13,1
4の何れかに切り換え制御するように構成してもよい。
特に、図8に示すように、駆動パルスの所定の周波数ま
では所定のパルス幅の特性ラインで液体燃料の吐出量を
制御し、また、駆動パルスの所定の周波数を超えると、
別の所定パルス幅の傾斜の大きい特性ラインで液体燃料
の吐出量を制御するような場合にも、本発明を適応させ
ることができて、より正確な吐出量制御をすることがで
き、より燃焼効率のよい快適な液体燃料供給装置を得る
ことができる。この場合、パルス幅の異なる特性ライン
の切り換え時に固定抵抗器を切り換え制御するようにす
ればよい。
Further, in the present embodiment, the output end of the fixed pulse is controlled to be switched to one of the fixed resistors 13 and 14 according to the pulse width of the driving pulse, but according to the pulse frequency of the driving pulse. Fixed resistor 13 and 1 at the output end
It may be configured to control switching to any one of the four.
Particularly, as shown in FIG. 8, the discharge amount of the liquid fuel is controlled by a characteristic line having a predetermined pulse width up to a predetermined frequency of the drive pulse, and when the predetermined frequency of the drive pulse is exceeded,
Even when the discharge amount of the liquid fuel is controlled by another characteristic line having a large inclination of a predetermined pulse width, the present invention can be applied, more accurate discharge amount control can be performed, and more combustion can be achieved. An efficient and comfortable liquid fuel supply device can be obtained. In this case, the fixed resistor may be controlled to be switched when the characteristic lines having different pulse widths are switched.

【0042】[0042]

【発明の効果】以上のように本発明によれば、所定のパ
ルス幅またはパルス周波数で、パルス波高値を切り換え
るようにしているため、少なくとも最大燃焼時と最小燃
焼時の間の吐出量のバラツキを所定吐出量範囲内とする
ことができ、最大燃焼時および最小燃焼時の両方および
それらの間においても、より正確な液体燃料の吐出量で
燃焼制御させることができて、最小燃焼時および最大燃
焼時、これらの間で燃焼空気との混合比のずれによる赤
火や不完全燃焼などを防止し、燃焼効率のよい液体燃料
供給装置を得ることができる。
As described above, according to the present invention, since the pulse crest value is switched with a predetermined pulse width or pulse frequency, the variation in the discharge amount between at least the maximum combustion and the minimum combustion is predetermined. It can be within the discharge amount range, and it is possible to perform combustion control with a more accurate discharge amount of liquid fuel during both maximum combustion and minimum combustion, and during both, during minimum combustion and maximum combustion. It is possible to obtain a liquid fuel supply device with good combustion efficiency by preventing red fire and incomplete combustion due to a difference in the mixing ratio with the combustion air between them.

【0043】また、駆動パルスの所定のパルス幅または
パルス周波数で抵抗部材を切り換えるようにしているた
め、液体燃料の吐出量のバラツキを所定誤差範囲内にそ
れぞれ容易に納めることができる。
Further, since the resistance member is switched at a predetermined pulse width or pulse frequency of the drive pulse, the variation in the discharge amount of the liquid fuel can be easily set within the predetermined error range.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施形態を示す電磁ポンプおよびそ
の制御部の構成図である。
FIG. 1 is a configuration diagram of an electromagnetic pump and a control unit thereof according to an embodiment of the present invention.

【図2】図1の電磁ポンプの構成を示す縦断面図であ
る。
FIG. 2 is a vertical cross-sectional view showing the configuration of the electromagnetic pump of FIG.

【図3】図1の電磁ポンプの構成を示す平面図である。FIG. 3 is a plan view showing the configuration of the electromagnetic pump of FIG.

【図4】本実施形態を適応させた場合の液体燃料の吐出
量と駆動パルス幅との関係を示す図である。
FIG. 4 is a diagram showing a relationship between a discharge amount of liquid fuel and a drive pulse width when the present embodiment is applied.

【図5】従来の電磁ポンプおよびその制御部の構成図で
ある。
FIG. 5 is a configuration diagram of a conventional electromagnetic pump and its control unit.

【図6】液体燃料の吐出量と駆動パルスの周波数との関
係を示す図である。
FIG. 6 is a diagram showing the relationship between the discharge amount of liquid fuel and the frequency of drive pulses.

【図7】液体燃料の吐出量と駆動パルス幅との関係を示
す図である。
FIG. 7 is a diagram showing a relationship between a discharge amount of liquid fuel and a drive pulse width.

【図8】駆動パルス幅に対する液体燃料の吐出量と駆動
パルスの周波数との関係を示す図である。
FIG. 8 is a diagram showing a relationship between a discharge amount of liquid fuel and a drive pulse frequency with respect to a drive pulse width.

【符号の説明】[Explanation of symbols]

11 電磁ポンプ 12 電磁コイル 13,14 固定抵抗器(抵抗部材) 15 パルス出力駆動回路(パルス出力手段) 11 Electromagnetic Pump 12 Electromagnetic Coil 13, 14 Fixed Resistor (Resistance Member) 15 Pulse Output Drive Circuit (Pulse Output Means)

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 電磁コイルに供給される駆動パルスのパ
ルス幅、パルス周波数およびパルス波高値に応じて液体
燃料の吐出量が変化する電磁ポンプにおいて、前記駆動
パルスの波高値切換用の抵抗部材が前記電磁コイルに複
数個接続されて配設されていることを特徴とする電磁ポ
ンプ。
1. An electromagnetic pump in which the discharge amount of liquid fuel changes according to the pulse width, pulse frequency and pulse crest value of a drive pulse supplied to an electromagnetic coil, wherein a resistance member for switching the crest value of the drive pulse is used. An electromagnetic pump comprising a plurality of electromagnetic coils connected to the electromagnetic coil.
【請求項2】 供給される駆動パルスのパルス幅および
パルス周波数、パルス波高値に応じて液体燃料の吐出量
が変化する液体燃料供給装置において、前記駆動パルス
の所定のパルス幅またはパルス周波数で、前記駆動パル
スのパルス波高値を切り換えるように制御する駆動制御
手段が設けられていることを特徴とする液体燃料供給装
置。
2. A liquid fuel supply device in which the discharge amount of liquid fuel changes according to the pulse width and pulse frequency of a supplied drive pulse, and the pulse crest value, in a predetermined pulse width or pulse frequency of the drive pulse, A liquid fuel supply device comprising drive control means for controlling the pulse crest value of the drive pulse to be switched.
【請求項3】 請求項1記載の電磁ポンプと、この電磁
ポンプの電磁コイルに供給される駆動パルスの所定のパ
ルス幅またはパルス周波数で、前記複数の抵抗部材のう
ちの所定の抵抗部材を選択し、この選択された所定の抵
抗部材を介して前記駆動パルスを前記電磁コイルに供給
するパルス出力手段とを有することを特徴とする液体燃
料供給装置。
3. The electromagnetic pump according to claim 1, and a predetermined resistance member of the plurality of resistance members is selected with a predetermined pulse width or pulse frequency of a drive pulse supplied to an electromagnetic coil of the electromagnetic pump. And a pulse output means for supplying the drive pulse to the electromagnetic coil through the selected predetermined resistance member.
JP11362696A 1996-05-08 1996-05-08 Electromagnetic pump and liquid fuel supply device Expired - Fee Related JP3602256B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11362696A JP3602256B2 (en) 1996-05-08 1996-05-08 Electromagnetic pump and liquid fuel supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11362696A JP3602256B2 (en) 1996-05-08 1996-05-08 Electromagnetic pump and liquid fuel supply device

Publications (2)

Publication Number Publication Date
JPH09296775A true JPH09296775A (en) 1997-11-18
JP3602256B2 JP3602256B2 (en) 2004-12-15

Family

ID=14616998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11362696A Expired - Fee Related JP3602256B2 (en) 1996-05-08 1996-05-08 Electromagnetic pump and liquid fuel supply device

Country Status (1)

Country Link
JP (1) JP3602256B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008026661A1 (en) * 2006-08-29 2008-03-06 Panasonic Corporation Reciprocating pump control device, electric device using this, fuel cell system, and reciprocating pump control method
JP2021076335A (en) * 2019-11-12 2021-05-20 株式会社コロナ Combustion device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10920768B2 (en) * 2017-09-14 2021-02-16 Milton Roy, Llc Pump drive that minimizes a pulse width based on voltage data to improve intake and discharge strokes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008026661A1 (en) * 2006-08-29 2008-03-06 Panasonic Corporation Reciprocating pump control device, electric device using this, fuel cell system, and reciprocating pump control method
JP2021076335A (en) * 2019-11-12 2021-05-20 株式会社コロナ Combustion device

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