JPH07158530A - Return fuel cooling device of automobile - Google Patents

Return fuel cooling device of automobile

Info

Publication number
JPH07158530A
JPH07158530A JP30886693A JP30886693A JPH07158530A JP H07158530 A JPH07158530 A JP H07158530A JP 30886693 A JP30886693 A JP 30886693A JP 30886693 A JP30886693 A JP 30886693A JP H07158530 A JPH07158530 A JP H07158530A
Authority
JP
Japan
Prior art keywords
fuel
return
heat exchanger
return fuel
automobile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP30886693A
Other languages
Japanese (ja)
Inventor
Toshihiko Hayashi
俊彦 林
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP30886693A priority Critical patent/JPH07158530A/en
Publication of JPH07158530A publication Critical patent/JPH07158530A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PURPOSE:To provide a cooling device of the return fuel of an automobile which has a good cooling efficiency, and requires no energy consumption particularly. CONSTITUTION:A double tube structure heat exchanger 1 is formed of an inner tube 2 and an outer tube 3, and the drain water W drained from the cooler unit of an air conditioning device of the outer tube 3 is made to flow in and drain freely, as well as the inner tube 2 of the heat exchanger 1 is provided on the way of a fuel return passage. Since the drain water W drained form the cooler unit flows into the inside of the outer tube 3 and comes in contact with the inner tube 2, the temperature of the return fuel F flowing through the inner tube 2 can be cooled by the drain water W. Since the system is a water cooling system, the cooling efficiency is good enough, and since the drain water is utilized, a particular energy consumption is not required.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は自動車のリターン燃料
の冷却装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for return fuel of an automobile.

【0002】[0002]

【従来の技術】自動車のエンジンには安定した出力を確
保するために予め多めの燃料が供給され、そしてエンジ
ンで消費されなかった余剰燃料を再び燃料タンクに戻す
仕組みになっている(例えば、実開昭62−11002
8号公報参照)。
2. Description of the Related Art A large amount of fuel is previously supplied to an automobile engine in order to secure a stable output, and a surplus fuel not consumed by the engine is returned to the fuel tank (for example, a real engine). Kaisho 62-11002
No. 8).

【0003】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うに燃料を高温のエンジンに繰り返し循環させているう
ちに、燃料タンク内の燃料温度が次第に高まる。燃料の
温度が高まるということは、エンジンの始動性やアイド
リングの安定性に影響を及ぼすおそれがあるため、好ま
しいことではない。つまり、このような燃料の温度上昇
が、気温の低い時(例えば冬季)には、エンジンの始動
性やアイドリングの安定性に影響を及ぼすおそれがない
ものの、冷房の使用が必要なほど気温の高い時(例え
ば、夏季)には上記影響を及ぼすおそれがある。そのた
めの対策として、燃料リターン経路の途中に多数のフィ
ンを設けた放熱部を設け、そこに専用のファンで風を送
る空冷方式によりリターン燃料の温度を下げる装置が知
られているが、空冷方式なので冷却効率が悪く、しかも
専用のファンを回転させる必要があるため、電気エネル
ギーも多く消費する。
However, as the fuel is repeatedly circulated through the high temperature engine, the temperature of the fuel in the fuel tank gradually rises. Increasing the temperature of the fuel is not preferable because it may affect the startability of the engine and the stability of idling. In other words, such an increase in fuel temperature does not affect engine startability and idling stability when the temperature is low (for example, in winter), but the temperature is high enough to require the use of cooling. At times (for example, in summer), the above-mentioned influence may occur. As a countermeasure for that, there is known a device that lowers the temperature of the return fuel by an air cooling method in which a heat radiating section provided with a large number of fins is provided in the middle of the fuel return path and an air is blown by a dedicated fan there. Therefore, the cooling efficiency is poor, and moreover, a dedicated fan needs to be rotated, which consumes a lot of electric energy.

【0004】この発明はこのような従来の技術に着目し
てなされたものであり、冷却効率が良く、しかもエネル
ギー消費を特に必要としない自動車のリターン燃料の冷
却装置を提供するものである。
The present invention has been made by paying attention to such a conventional technique, and provides a cooling device for a return fuel of an automobile which has a high cooling efficiency and does not particularly require energy consumption.

【0005】[0005]

【課題を解決するための手段】この発明に係る自動車の
リターン燃料の冷却装置は、上記の目的を達成するため
に、内筒部と外筒部とで二重筒構造の熱交換器を形成
し、該熱交換器の内筒部を燃料リターン経路の途中部分
に介在せしめると共に、外筒部に空気調和装置のクーラ
ユニットから排出された排水を流入・排出自在としたも
のである。
In order to achieve the above object, a cooling device for a return fuel of an automobile according to the present invention forms a double-tube heat exchanger with an inner cylinder part and an outer cylinder part. The inner cylinder of the heat exchanger is interposed in the middle of the fuel return path, and the waste water discharged from the cooler unit of the air conditioner is allowed to flow in and out of the outer cylinder.

【0006】[0006]

【作用】空気調和装置のクーラユニットから排出された
低温の排水が、外筒部内に流入して内筒部に接触するた
め、その排水により内筒部内を流れるリターン燃料の温
度を低下させることができる。水冷方式なので冷却効率
が良く、しかも排水を利用するので、特別なエネルギー
消費もない。
The low-temperature drainage discharged from the cooler unit of the air conditioner flows into the outer tubular part and contacts the inner tubular part, so that the temperature of the return fuel flowing in the inner tubular part can be lowered by the drainage. it can. Since it is a water-cooled system, it has good cooling efficiency, and since it uses drainage, it does not consume any special energy.

【0007】[0007]

【実施例】図1〜図3はこの発明の好適な一実施例を示
す図である。1がこの実施例に係る熱交換器である。こ
の熱交換器1は熱伝導率の良いアルミ製で、所定長さの
内筒部2と、該内筒部2よりも大径で両端部3aを前記
内筒部2に接続した外筒部3と、から成っている。従っ
て、内筒部2の周囲には外筒部3によるジャケット室R
が形成された状態となっている。また、外筒部3の一端
には上向きの入口パイプ4が設けられ、他端には下向き
の出口パイプ5が設けられている。一方、内筒部2には
複数のフィン2aが放射状に形成されており、内筒部2
の表面積の拡大を図っている。
1 to 3 are views showing a preferred embodiment of the present invention. 1 is the heat exchanger according to this embodiment. The heat exchanger 1 is made of aluminum having a high thermal conductivity, and has an inner cylindrical portion 2 having a predetermined length and an outer cylindrical portion having a diameter larger than that of the inner cylindrical portion 2 and having both end portions 3a connected to the inner cylindrical portion 2. It consists of three and three. Therefore, the jacket chamber R formed by the outer tubular portion 3 is provided around the inner tubular portion 2.
Has been formed. Further, an upward inlet pipe 4 is provided at one end of the outer tubular portion 3, and a downward outlet pipe 5 is provided at the other end. On the other hand, a plurality of fins 2a are radially formed on the inner cylinder portion 2,
To increase the surface area of.

【0008】そして、6がリターンホース、7、8がリ
ターンチューブであり、これらにより図外のエンジンか
ら燃料タンクにリターン燃料Fを送るための「燃料リタ
ーン経路」が主として形成される。前記熱交換器1は、
この「燃料リターン経路」におけるリターンチューブ
7、8の間に設けられる。すなわち、リターンチューブ
7、8の端末にはそれぞれフランジ7a、8aが形成さ
れ、該フランジ7a、8aをネジNにより外筒部3の両
端部3aへ取付けることにより、両リターンチューブ
7、8同士が内筒部2にて連結された状態となり、該内
筒部2が「燃料リターン経路」の一部分を形成するよう
になる。尚、フランジ7a、8aと両端部3aとの間に
は図示せぬシール部材が設けられており、リターン燃料
Fの漏れを確実に防止している。
Reference numeral 6 is a return hose, and reference numerals 7 and 8 are return tubes, which mainly form a "fuel return path" for sending a return fuel F from an engine (not shown) to a fuel tank. The heat exchanger 1 is
It is provided between the return tubes 7 and 8 in this "fuel return path". That is, flanges 7a and 8a are formed at the ends of the return tubes 7 and 8, respectively. By attaching the flanges 7a and 8a to both ends 3a of the outer tubular portion 3 with screws N, both return tubes 7 and 8 are connected to each other. The inner tubular portion 2 is connected, and the inner tubular portion 2 forms a part of the "fuel return path". A seal member (not shown) is provided between the flanges 7a and 8a and both end portions 3a to reliably prevent the return fuel F from leaking.

【0009】また、熱交換器1の外筒部3に形成された
入口パイプ4にはドレンホース9が接続されている。こ
のドレンホース9はダッシュロアパネル10付近に設置
された空調装置のクーラユニット11から延びており、
このドレンホース9にはクーラユニット11から順次排
出される排水Wが流れ込むようになっている。従って、
このクーラユニット11からの排水Wは、このドレンホ
ース9を通って入口パイプ4から外筒部3内のジャケッ
ト室Rに流れ込む。そして、外筒部3の出口パイプ5に
はキャップ状のバルブ12が取付けてある。このバルブ
12の先端には熱交換器1のジャケット室R内が排水W
で満水になった時のみ、その水圧で開くスリット12a
が形成されている。
A drain hose 9 is connected to the inlet pipe 4 formed in the outer cylinder portion 3 of the heat exchanger 1. The drain hose 9 extends from a cooler unit 11 of an air conditioner installed near the dash lower panel 10,
Waste water W sequentially discharged from the cooler unit 11 flows into the drain hose 9. Therefore,
The drainage W from the cooler unit 11 passes through the drain hose 9 and flows into the jacket chamber R in the outer tubular portion 3 from the inlet pipe 4. A cap-shaped valve 12 is attached to the outlet pipe 5 of the outer tubular portion 3. The inside of the jacket chamber R of the heat exchanger 1 is drained at the tip of the valve 12.
Slit 12a opened by the water pressure only when the water is full
Are formed.

【0010】次に、この熱交換器1によるリターン燃料
Fの具体的冷却性能について説明する。リターン燃料F
の温度は60°で、内筒部2内を60〜80リットル/
時の流量で流れる。一方、排水Wは20℃で、前記ドレ
ンホース9から、100ミリリットル/分の流量で外筒
部3内のジャケット室Rへ流入してそこに溜まり、該ジ
ャケット室Rは排水Wの液面Lが入口パイプ4の若干上
方に位置した満水状態となる。排水Wがこの満水状態以
上に流入されると、出口パイプ5に取付けられたバルブ
12のスリット12aが開いて、そこから余剰分の排水
Wが車外へ排出され、ジャケット室R内の排水Wの液面
Lは常に一定状態が保たれる。このように、外筒部3内
は常に温度の低い新しい排水Wが供給され続けた満水状
態となっており、この満水状態となっている排水Wが内
筒部2のフィン2aに接触した状態となっているため、
内筒部2を流れるリターン燃料Fはこの排水Wにより冷
却されることとなる。
Next, the specific cooling performance of the return fuel F by the heat exchanger 1 will be described. Return fuel F
Temperature is 60 °, and the inside of the inner cylinder part 2 is 60-80 liters /
It flows at the flow rate of time. On the other hand, the drainage water W is 20 ° C., flows from the drain hose 9 into the jacket chamber R in the outer cylinder portion 3 at a flow rate of 100 ml / min, and collects therein. Is located slightly above the inlet pipe 4 and is in a full state. When the wastewater W flows into the outlet pipe 5 or more, the slit 12a of the valve 12 attached to the outlet pipe 5 opens, and the excess wastewater W is discharged from the slit 12a to the outside of the vehicle. The liquid level L is always kept constant. As described above, the inside of the outer tubular portion 3 is always filled with new drainage W having a low temperature, and the drained water W in the full state is in contact with the fins 2a of the inner tubular portion 2. Since,
The return fuel F flowing through the inner cylinder portion 2 is cooled by this drainage W.

【0011】前記のような排水W及びリターン燃料Fの
温度・流量条件で実際に熱交換を行うと、60℃程度で
あったリターン燃料Fは58℃となり、その差2℃の温
度低下を行うことができた。この排水Wによるリターン
燃料Fの冷却性能は、クーラユニット11から排出され
る排水Wの温度及び流量により左右されるが、排水Wに
よって熱を奪う水冷式のため空冷式に比べると冷却効率
が大変に良い。しかも、クーラユニット11から車外へ
捨てられるだけの排水Wを有効利用してリターン燃料F
の冷却を行うため、バッテリの電気エネルギー等を消費
することもない。
When heat exchange is actually performed under the temperature / flow rate conditions of the waste water W and the return fuel F as described above, the return fuel F which has been about 60 ° C. becomes 58 ° C., and the temperature difference is reduced by 2 ° C. I was able to. The cooling performance of the return fuel F by the drainage W depends on the temperature and flow rate of the drainage W discharged from the cooler unit 11. However, the cooling efficiency is greater than that of the air-cooling type because it is a water cooling type that removes heat from the drainage W. Good for Moreover, the return fuel F is effectively utilized by effectively utilizing the drainage W that is discarded from the cooler unit 11 to the outside of the vehicle.
Since it is cooled, the electric energy of the battery is not consumed.

【0012】以上の実施例によれば、バルブ12より外
筒部3内のジャケット室Rを満水にする例を示したが、
バルブ12に代えて、図2中に想像線(二点鎖線)で示
したような湾曲パイプ13を形成することにより満水状
態を維持するようにしても良い。但し、外筒部3内を満
水状態にすることは、必ずしも本発明の必須条件でな
く、ドレンホース9からの排水Wを何らかの手段により
内筒部2に接触させて、内筒部2内を流れるリターン燃
料Fの温度を低下させることができれば良い。
According to the above-mentioned embodiment, an example has been shown in which the jacket chamber R in the outer cylinder portion 3 is filled with water from the valve 12.
Instead of the valve 12, a full pipe may be maintained by forming a curved pipe 13 as shown by an imaginary line (two-dot chain line) in FIG. However, it is not always an essential condition of the present invention to fill the inside of the outer tubular portion 3 with water, and the drainage W from the drain hose 9 is brought into contact with the inner tubular portion 2 by some means so that the inner tubular portion 2 is filled with water. It suffices if the temperature of the flowing return fuel F can be lowered.

【0013】[0013]

【発明の効果】この発明に係る自動車のリターン燃料の
冷却装置は、以上説明してきた如き内容のものであっ
て、空気調和装置のクーラユニットから排出された排水
が、外筒部内に流入して内筒部に接触するため、その排
水により内筒部内を流れるリターン燃料の温度を低下さ
せることができる。水冷方式なので冷却効率が良く、し
かも排水を利用するので、特別なエネルギー消費もな
い。
The vehicle return fuel cooling device according to the present invention has the contents described above, and the waste water discharged from the cooler unit of the air conditioner flows into the outer cylinder portion. Since it comes into contact with the inner tubular portion, the temperature of the return fuel flowing in the inner tubular portion can be lowered by the drainage thereof. Since it is a water-cooled system, it has good cooling efficiency, and since it uses drainage, it does not consume any special energy.

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

【図1】この発明の一実施例に係る自動車のリターン燃
料の冷却装置を示す概略図である。
FIG. 1 is a schematic view showing a cooling device for return fuel of an automobile according to an embodiment of the present invention.

【図2】熱交換器の構造を示す斜視図である。FIG. 2 is a perspective view showing the structure of a heat exchanger.

【図3】図2中矢示SA−SA線に沿う断面図である。FIG. 3 is a cross-sectional view taken along the line SA-SA shown in FIG.

【符号の説明】[Explanation of symbols]

1 熱交換器 2 内筒部 3 外筒部 6 リターンホース(燃料リターン経路) 7、8 リターンチューブ(燃料リターン経路) 11 クーラユニット W 排水 F リターン燃料 1 heat exchanger 2 inner cylinder part 3 outer cylinder part 6 return hose (fuel return path) 7, 8 return tube (fuel return path) 11 cooler unit W drainage F return fuel

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 内筒部と外筒部とで二重筒構造の熱交換
器を形成し、該熱交換器の内筒部を燃料リターン経路の
途中部分に介在せしめると共に、外筒部に空気調和装置
のクーラユニットから排出された排水を流入・排出自在
としたことを特徴とする自動車のリターン燃料の冷却装
置。
1. A double-tube heat exchanger is formed by an inner cylinder part and an outer cylinder part, and the inner cylinder part of the heat exchanger is interposed in the middle of the fuel return path, and at the same time the outer cylinder part is formed. Cooling device for return fuel of automobiles, characterized in that waste water discharged from a cooler unit of an air conditioner can freely flow in and out.
JP30886693A 1993-12-09 1993-12-09 Return fuel cooling device of automobile Pending JPH07158530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30886693A JPH07158530A (en) 1993-12-09 1993-12-09 Return fuel cooling device of automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30886693A JPH07158530A (en) 1993-12-09 1993-12-09 Return fuel cooling device of automobile

Publications (1)

Publication Number Publication Date
JPH07158530A true JPH07158530A (en) 1995-06-20

Family

ID=17986205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30886693A Pending JPH07158530A (en) 1993-12-09 1993-12-09 Return fuel cooling device of automobile

Country Status (1)

Country Link
JP (1) JPH07158530A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100944860B1 (en) * 2007-12-18 2010-03-04 한국항공우주연구원 Fuel cooler for low temperature gasturbine engine combustor performance test
JP2017201154A (en) * 2016-05-06 2017-11-09 いすゞ自動車株式会社 Engine device
JP2021099050A (en) * 2019-12-20 2021-07-01 株式会社Subaru Centrifugal oil mist separator, reciprocating engine, aircraft, and oil mist separation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100944860B1 (en) * 2007-12-18 2010-03-04 한국항공우주연구원 Fuel cooler for low temperature gasturbine engine combustor performance test
JP2017201154A (en) * 2016-05-06 2017-11-09 いすゞ自動車株式会社 Engine device
JP2021099050A (en) * 2019-12-20 2021-07-01 株式会社Subaru Centrifugal oil mist separator, reciprocating engine, aircraft, and oil mist separation method

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