JP3053816B2 - Electric fuel supply pump - Google Patents
Electric fuel supply pumpInfo
- Publication number
- JP3053816B2 JP3053816B2 JP1005514A JP551489A JP3053816B2 JP 3053816 B2 JP3053816 B2 JP 3053816B2 JP 1005514 A JP1005514 A JP 1005514A JP 551489 A JP551489 A JP 551489A JP 3053816 B2 JP3053816 B2 JP 3053816B2
- Authority
- JP
- Japan
- Prior art keywords
- brush
- commutator
- pump
- life
- copper powder
- 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 - Fee Related
Links
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、モータ・ハウジング内を燃料が通過する
形式の燃料ポンプにおいて、モータのブラシおよびコミ
ュテータの寿命を向上させた電動式燃料供給ポンプに関
するものである。Description: TECHNICAL FIELD The present invention relates to a fuel pump of the type in which fuel passes through a motor housing, and to an electric fuel supply pump in which the life of a brush and a commutator of a motor is improved. Things.
（従来の技術） 従来、自動車等に用いられる電動式燃料供給ポンプ
（以下燃料ポンプともいう）においては、ポンプを駆動
するモータがポンプと同軸に結合され、ポンプで吸入し
た燃料をモータ・ハウジング内を通過させて吐出してい
る。モータはブラシおよびコミュテータを備えており、
ブラシはばね等で付勢され、一定の面圧でコミュテータ
と接触している。燃料ポンプのモータに使用されるブラ
シは、銅粉と黒鉛とを一定の比率で混合した金属黒鉛質
でできている。これらのブラシやコミュテータは使用時
間の経過とともに摩耗し、このため燃料ポンプの寿命は
ブラシとコミュテータの寿命によってきまる。従来、自
動車等で一般に使用されているインタンク型燃料ポンプ
においては、ブラシ中の銅粉含有率を25重量％とし、こ
れをブラシ面圧が680g/cm2程度の条件下で用いている。
この条件下ではブラシの寿命が約30,000時間、コミュテ
ータの寿命が約10,000時間となっている（後で詳しく説
明する第２、第３図を参照）。(Prior Art) Conventionally, in an electric fuel supply pump (hereinafter also referred to as a fuel pump) used for an automobile or the like, a motor for driving the pump is coaxially coupled with the pump, and fuel sucked by the pump is supplied to a motor housing. And is discharged. The motor has a brush and a commutator,
The brush is urged by a spring or the like and is in contact with the commutator with a constant surface pressure. The brush used for the motor of the fuel pump is made of metallic graphite in which copper powder and graphite are mixed at a fixed ratio. These brushes and commutators wear out over time, so the life of the fuel pump is determined by the life of the brushes and commutator. Conventionally, in an in-tank type fuel pump generally used in automobiles and the like, the content of copper powder in a brush is set to 25% by weight, and this is used under the condition that the brush surface pressure is about 680 g / cm 2 .
Under these conditions, the life of the brush is about 30,000 hours and the life of the commutator is about 10,000 hours (see FIGS. 2 and 3 which will be described later in detail).
（発明が解決しようとする課題） この発明は、電動式燃料供給ポンプのブラシ、コミュ
テータの形状ないし寸法を変えることなく、それらの寿
命を向上させようとするものである。(Problems to be Solved by the Invention) The present invention aims to improve the life of brushes and commutators of an electric fuel supply pump without changing the shapes or dimensions thereof.
上記目的を実現するために、発明者はブラシの材質、
組成、ブラシ面圧、コミュテータの材質等を種々に変え
て、これらの要素が寿命に与える影響を検討した。In order to achieve the above object, the inventor has proposed a brush material,
The effects of these factors on the service life were examined by changing the composition, the brush surface pressure, the material of the commutator, etc. in various ways.
この結果、ブラシ面圧とブラシ組成が寿命に大きな影
響を与えることを見出した。As a result, it has been found that the brush surface pressure and the brush composition greatly affect the life.
第２図は、ブラシ面圧をパラメータとして横軸にブラ
シ中の銅粉含有量、縦軸にブラシの寿命をとって、発明
者の実験結果を示したものであり、同図から明らかに銅
粉含有量が小さいほど寿命は延びることが見出された。FIG. 2 shows the experimental results of the inventor using the brush surface pressure as a parameter and the copper powder content in the brush on the horizontal axis and the life of the brush on the vertical axis. It has been found that the lower the powder content, the longer the life.
第３図は第２図と同様にしてコミュテータの寿命を示
したものであり、銅粉含有量が小さいほどコミュテータ
の寿命も延びることが見出された。FIG. 3 shows the life of the commutator in the same manner as FIG. 2, and it has been found that the life of the commutator is extended as the copper powder content is reduced.
一方これに対して第４図は、ブラシ面圧をパラメータ
として横軸にブラシ中の銅粉含有量、縦軸にブラシ、コ
ミュテータ間に生じる電圧降下を示したものであり、銅
粉含有量を小さくすると電圧降下が増大し、ポンプ効率
が減少することを見出した。On the other hand, FIG. 4 shows the content of copper powder in the brush on the horizontal axis and the voltage drop generated between the brush and the commutator on the vertical axis using the brush surface pressure as a parameter. It has been found that a smaller value increases the voltage drop and decreases the pump efficiency.
すなわち寿命を増大させるためには銅粉含有量が小さ
いほど有利であるのに対し、銅粉含有量を小さくする
と、ポンプ効率が減少することを見出した。In other words, it has been found that the smaller the copper powder content is, the more advantageous the service life is, while the smaller the copper powder content is, the lower the pump efficiency is.
発明者はこのような関係のなかで、ポンプ効率を落と
すことなく寿命を向上させることのでる条件を見出すべ
く研究した。In such a relationship, the inventor has studied to find a condition for improving the life without reducing the pump efficiency.
この研究において、ブラシ面圧をあまり高くするとブ
ラシ、コミュテータ間の機械的摩耗が激しくなり、さり
とて、あまり低くするとブラシ、コミュテータ間にスパ
ークが生じる等の影響によりやはり寿命が低下すること
が見出された。In this study, it was found that when the brush surface pressure was too high, the mechanical wear between the brush and the commutator became severe. Was.
ここで本研究対象では、ブラシ、コミュテータ間に燃
料が充満しているため、従来の空気中での実験結果は全
く利用できず、最適条件を見出すことは容易でなかっ
た。Here, in the present research object, since the fuel was filled between the brush and the commutator, the experimental results in the conventional air could not be used at all, and it was not easy to find the optimum conditions.
（課題を解決するための手段） 上記課題は、モータ・ハウジング内に一定のブラシ面
圧でコミュテータと接触する金属黒鉛質ブラシを備えた
整流子付モータでポンプを駆動し、そのポンプで吸入し
た燃料を前記モータ・ハウジング内を通過させて吐出
し、前記ブラシとコミュテータとの接触部が燃料中に浸
されるインタンク型の電動式燃料供給ポンプであって、
前記ブラシの銅粉含有量を10〜15重量％とし、ブラシ面
圧は前記ブラシ〜コミュテータ間の電圧降下が2V程度と
なる値に設定した電動式燃料供給ポンプによって解決さ
れた。(Means for Solving the Problems) The above-mentioned problem is achieved by driving a pump with a commutator-equipped motor having a metal graphite brush in contact with a commutator with a constant brush surface pressure in a motor housing and sucking the pump. An in-tank type electric fuel supply pump in which fuel is discharged by passing through the motor housing, and a contact portion between the brush and the commutator is immersed in fuel,
The problem was solved by an electric fuel supply pump in which the copper powder content of the brush was set to 10 to 15% by weight, and the brush surface pressure was set to a value at which the voltage drop between the brush and the commutator was about 2 V.
（作用） 前記手段の電動式燃料供給ポンプによれば、従来のも
のと比べて銅粉含有量が10〜15重量％と少ない金属黒鉛
質ブランを、ブラシとコミュテータとの接触部が燃料中
に浸される状態でブラシ〜コミュテータ間の電圧降下が
2V程度となるブラシ面圧で使用することにより、従来の
ものとほぼ同等のポンプ効率を確保しながらも、ブラシ
およびコミュテータの摩耗を少なくしてブラシおよびコ
ミュテータの寿命を向上することができる。(Operation) According to the electric fuel supply pump of the above-mentioned means, the metallic graphite bran having a copper powder content of 10 to 15% by weight, which is smaller than that of the conventional one, is introduced into the fuel at the contact portion between the brush and the commutator The voltage drop between the brush and the commutator when immersed
By using the brush surface pressure of about 2 V, it is possible to reduce the wear of the brush and the commutator and improve the life of the brush and the commutator, while maintaining the pump efficiency almost equal to the conventional one.
（実施例） 以下実施例を示す図面に基づいて、この発明を説明す
る。第１図は実施例の電動式燃料供給ポンプの一部破断
側面図である。この燃料ポンプは自動車等の燃料タンク
内に縦置きに装着され、上側にモータ部、下側にポンプ
部が位置している。図はモータの上部を破断して示し、
モータ・ハウジング１の中心部にアーマチュア２が回転
可能に挿入され、モータ・ハウジング１の内面にはアー
マチュア２に対応してマグネット３が取り付けられてい
る。モータ・シャフト４は軸受５に支持されており、ブ
ラシ６が捩じりばね７によって付勢され、一定面圧でコ
ミュテータ８に接触している。この発明のブラシ６は銅
粉含有量10〜15重量％の金属黒鉛質でできている。燃料
ポンプ上端に絶縁材９を介して上部カバー10が取り付け
られ、そのほぼ中央に燃料吐出口11が設けられている。
外部の直流電源は電源端子12に接続され、ワイヤ13を介
してブラシ６に接続されている。ポンプ部の遠心ポンプ
（図示しない）により燃料吸入口14から吸入された燃料
は、ポンプ部を経てモータ・ハウジング１の中を通過
し、燃料吐出口11からエンジンへ圧送される。(Example) Hereinafter, the present invention will be described with reference to the drawings showing examples. FIG. 1 is a partially cutaway side view of an electric fuel supply pump according to an embodiment. The fuel pump is mounted vertically in a fuel tank of an automobile or the like, and has a motor unit on the upper side and a pump unit on the lower side. The figure shows the top of the motor cut away,
An armature 2 is rotatably inserted into the center of the motor housing 1, and a magnet 3 is attached to the inner surface of the motor housing 1 so as to correspond to the armature 2. The motor shaft 4 is supported by a bearing 5, and a brush 6 is urged by a torsion spring 7 to contact a commutator 8 at a constant surface pressure. The brush 6 of the present invention is made of metallic graphite having a copper powder content of 10 to 15% by weight. An upper cover 10 is attached to the upper end of the fuel pump via an insulating material 9, and a fuel discharge port 11 is provided substantially at the center.
An external DC power supply is connected to a power supply terminal 12 and to the brush 6 via a wire 13. Fuel sucked from a fuel inlet 14 by a centrifugal pump (not shown) of the pump section passes through the motor housing 1 through the pump section, and is pumped from the fuel outlet 11 to the engine.
つぎにこの発明の作用を説明する。第２図はブラシの
銅粉含有量とブラシの寿命時間の関係を示す説明図であ
る。図においてグラフB1はブラシ面圧680g/cm2、グラフ
B2はブラシ面圧908g/cm2の場合の特性を示している。こ
の発明によりブラシの銅粉含有量を10〜15重量％として
ブラシ面圧を908g/cm2で使用すると、ブラシの寿命はほ
ぼ30,000〜45,000時間となる。従来のブラシは、ブラシ
面圧680g/cm2、銅粉含有量25重量％の点で示され、ブラ
シの寿命は30,000時間弱である。したがって、この発明
によるブラシを面圧908g/cm2で使用すると、ブラシの寿
命を大幅に向上できることがわかる。Next, the operation of the present invention will be described. FIG. 2 is an explanatory diagram showing the relationship between the copper powder content of the brush and the life time of the brush. In the figure, graph B1 is a brush surface pressure of 680 g / cm 2 ,
B2 shows the characteristics when the brush surface pressure is 908 g / cm 2 . When the brush powder pressure is 908 g / cm 2 and the copper powder content of the brush is 10 to 15% by weight according to the present invention, the life of the brush is approximately 30,000 to 45,000 hours. The conventional brush has a brush surface pressure of 680 g / cm 2 and a copper powder content of 25% by weight, and has a brush life of less than 30,000 hours. Therefore, it can be seen that when the brush according to the present invention is used at a surface pressure of 908 g / cm 2 , the life of the brush can be greatly improved.
第３図はブラシの銅粉含有量とコミュテータの寿命時
間の関係を示す説明図である。図においてグラフC1はブ
ラシ面圧680g/cm2、グラフC2はブラシ面圧908g/cm2の場
合の特性を示しており、この発明によりブラシの銅粉含
有量を10〜15重量％としてブラシ面圧を908g/cm2で使用
すると、コミュテータの寿命がほぼ13,000〜18,000時間
となる。従来のコミテータの寿命はブラシ面圧680g/c
m2、ブラシの銅粉含有量25重量％の点で示され、コミュ
テータの寿命は約10,000時間である。したがって、この
発明によるブラシを面圧908g/cm2で使用すると、コミュ
テータの寿命を大幅に向上できることがわかる。FIG. 3 is an explanatory diagram showing the relationship between the copper powder content of the brush and the life time of the commutator. In the figure, the graph C1 shows the characteristics when the brush pressure is 680 g / cm 2 , and the graph C2 shows the characteristics when the brush pressure is 908 g / cm 2. When the pressure is used at 908 g / cm 2 , the life of the commutator is approximately 13,000 to 18,000 hours. The life of the conventional commutator is 680 g / c of brush surface pressure
The commutator has a lifespan of about 10,000 hours, indicated in terms of m 2 , the copper powder content of the brush being 25% by weight. Therefore, it can be seen that when the brush according to the present invention is used at a surface pressure of 908 g / cm 2 , the life of the commutator can be greatly improved.
第４図はブラシの銅粉含有量とブラシ〜コミュテータ
間の電圧降下との関係を示す説明図である。グラフV1で
示されるブラシ面圧680g/cm2の場合、従来の銅粉含有量
25重量％では電圧降下が2V程度であるが、銅粉含有量を
減らすと電圧降下が大きくなる。これは銅粉含有量の減
少によりブラシとコミュテータ間の導通が低下するため
と考えられる。これに対してグラフV2で示されるブラシ
面圧908g/cm2の場合は、銅粉含有量を減らしても面圧が
高いため導通に対する影響は小さく、電圧降下の値はほ
とんど変わらない。したがって、この発明の銅粉含有量
10〜15重量％のブラシの場合、従来と同程度の2Vの電圧
降下を維持することができる。FIG. 4 is an explanatory diagram showing the relationship between the copper powder content of the brush and the voltage drop between the brush and the commutator. In the case of the brush surface pressure of 680 g / cm 2 shown in graph V1, the conventional copper powder content
At 25% by weight, the voltage drop is about 2V, but when the copper powder content is reduced, the voltage drop increases. This is considered to be because conduction between the brush and the commutator is reduced due to the decrease in the copper powder content. On the other hand, in the case of the brush surface pressure of 908 g / cm 2 shown in the graph V2, even if the copper powder content is reduced, the surface pressure is high, so the effect on conduction is small, and the value of the voltage drop hardly changes. Therefore, the copper powder content of the present invention
In the case of a brush of 10 to 15% by weight, a voltage drop of 2 V which is the same as the conventional one can be maintained.
以上を総合すると、この実施例によればポンプを駆動
する整流子付モータにおいて、銅粉含有量10〜15重量％
の金属黒鉛質ブラシを面圧約910g/cm2で使用することに
より、ブラシ〜コミュテータ間の電圧降下を従来とほぼ
同様の2Vに維持し、ブラシの寿命を30,000時間以上、ま
たコミュテータの寿命を10,000時間以上とすることがで
きる。なおブラシ面圧は、ブラン〜コミュテータ間の電
圧降下が2V程度となる値に設定されればよい。Summarizing the above, according to this embodiment, in the motor with the commutator for driving the pump, the copper powder content is 10 to 15% by weight.
By the metal graphite brush used at a surface pressure of about 910 g / cm 2, to maintain the voltage drop between the brush-commutator to the conventional substantially the same 2V, the life of the brush 30,000 hours or more, the life of the commutator 10,000 It can be more than hours. The brush surface pressure may be set to a value at which the voltage drop between the bran and the commutator is about 2V.
（発明の効果） この発明の電動式燃料供給ポンプによれば、従来のも
のとほぼ同等のポンプ効率を確保しながらも、ブラシお
よびコミュテータの摩耗を少なくしてブラシおよびコミ
ュテータの寿命を向上することができる。(Effect of the Invention) According to the electric fuel supply pump of the present invention, it is possible to improve the life of the brush and the commutator by reducing the wear of the brush and the commutator while maintaining the pump efficiency almost equal to the conventional one. Can be.
第１図はこの発明の実施例の電動式燃料供給ポンプの一
部破断側面図、第２図はブラシの銅粉含有量とブラシの
寿命時間の関係を示す説明図、第３図はブラシの銅粉含
有量とコミュテータの寿命時間の関係を示す説明図、第
４図はブラシの銅粉含有量とブラシ〜コミュテータ間の
電圧降下との関係を示す説明図である。 １……モータ・ハウジング ２……アーマチュア ３……マグネット ４……モータ・シャフト ６……金属黒鉛質ブラシ ８……コミュテータFIG. 1 is a partially cutaway side view of an electric fuel supply pump according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the relationship between the copper powder content of the brush and the life time of the brush, and FIG. FIG. 4 is an explanatory diagram showing the relationship between the copper powder content and the life time of the commutator, and FIG. 4 is an explanatory diagram showing the relationship between the copper powder content of the brush and the voltage drop between the brush and the commutator. DESCRIPTION OF SYMBOLS 1 ... Motor housing 2 ... Armature 3 ... Magnet 4 ... Motor shaft 6 ... Metal graphite brush 8 ... Commutator
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭49−80503（ＪＰ，Ａ) 特開 昭61−66547（ＪＰ，Ａ) 特開 昭64−8844（ＪＰ，Ａ) 実開 昭57−111086（ＪＰ，Ｕ) 実開 昭60−128466（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-80503 (JP, A) JP-A-61-66547 (JP, A) JP-A-64-8844 (JP, A) 111086 (JP, U) Japanese Utility Model Showa 60-128466 (JP, U)
Claims (1)
でコミュテータと接触する金属黒鉛質ブラシを備えた整
流子付モータでポンプを駆動し、そのポンプで吸入した
燃料を前記モータ・ハウジング内を通過させて吐出し、
前記ブラシとコミュテータとの接触部が燃料中に浸され
るインタンク型の電動式燃料供給ポンプであって、前記
ブラシの銅粉含有量を10〜15重量％とし、ブラシ面圧は
前記ブラシ〜コミュテータ間の電圧降下が2V程度となる
値に設定した電動式燃料供給ポンプ。A pump is driven by a commutator-equipped motor provided with a metallic graphite brush in contact with a commutator at a constant brush surface pressure in a motor housing, and fuel sucked by the pump is passed through the motor housing. Let it pass and discharge,
An in-tank type electric fuel supply pump in which a contact portion between the brush and a commutator is immersed in fuel, wherein the copper powder content of the brush is 10 to 15% by weight, and the brush surface pressure is the brush to An electric fuel supply pump with a voltage drop between commutators of about 2V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005514A JP3053816B2 (en) | 1989-01-12 | 1989-01-12 | Electric fuel supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005514A JP3053816B2 (en) | 1989-01-12 | 1989-01-12 | Electric fuel supply pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02188146A JPH02188146A (en) | 1990-07-24 |
| JP3053816B2 true JP3053816B2 (en) | 2000-06-19 |
Family
ID=11613296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1005514A Expired - Fee Related JP3053816B2 (en) | 1989-01-12 | 1989-01-12 | Electric fuel supply pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3053816B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007110785A (en) * | 2005-10-11 | 2007-04-26 | Denso Corp | Alternator for vehicle |
| DE102012220583A1 (en) * | 2012-11-12 | 2014-05-15 | Hoffmann & Co. Elektrokohle Ag | Process for the production of a carbon component and carbon abrasive piece |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53481B2 (en) * | 1972-12-05 | 1978-01-09 | ||
| JPS6166547A (en) * | 1984-09-07 | 1986-04-05 | Fuji Kako Kk | Brush for rotary electric machine |
-
1989
- 1989-01-12 JP JP1005514A patent/JP3053816B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02188146A (en) | 1990-07-24 |
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