JPH0134297B2 - - Google Patents
Info
- Publication number
- JPH0134297B2 JPH0134297B2 JP14795582A JP14795582A JPH0134297B2 JP H0134297 B2 JPH0134297 B2 JP H0134297B2 JP 14795582 A JP14795582 A JP 14795582A JP 14795582 A JP14795582 A JP 14795582A JP H0134297 B2 JPH0134297 B2 JP H0134297B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel oil
- fuel
- pipe
- buffer tank
- pump
- 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
- 239000000295 fuel oil Substances 0.000 claims description 111
- 239000000446 fuel Substances 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000003921 oil Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000011010 flushing procedure Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、内燃機関の燃料供給装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to a fuel supply device for an internal combustion engine.
従来の技術
従来の内燃機関、特にデイーゼル機関の燃料供
給装置においては、大気に開放された燃料油サー
ビスタンクから燃料油供給ポンプにより燃料油供
給管路を介して機関の燃料噴射ポンプへ燃料を供
給し、この燃料噴射ポンプにより燃料弁へ燃料を
圧送している。燃料弁からの戻り油は、燃料戻り
管路により燃料油サービスタンクに戻される。燃
料戻り管路には、この管路の中の気体を除去して
燃料油だけを燃料油サービスタンクに戻すことが
できるように、大気に開放された気液分離装置が
設けられている。Prior Art In a conventional fuel supply system for an internal combustion engine, especially a diesel engine, fuel is supplied from a fuel oil service tank open to the atmosphere to the engine's fuel injection pump via a fuel oil supply pipe by a fuel oil supply pump. This fuel injection pump pumps fuel to the fuel valve. Return oil from the fuel valve is returned to the fuel oil service tank by a fuel return line. The fuel return line is provided with a gas-liquid separator that is open to the atmosphere so that the gas in the line can be removed and only the fuel oil can be returned to the fuel oil service tank.
さらに従来のこの種の燃料供給装置において
は、燃料噴射ポンプの押し込み圧力を確保し、か
つ燃料油供給管路側と戻り管路側との間に圧力差
をもたせて燃料噴射弁へ燃料を循環させるため
に、燃料油圧力調整弁（オーバーフロー弁）が、
これら燃料油供給管路と戻り管路との境界部に装
備されている。 Furthermore, in this type of conventional fuel supply device, the pushing pressure of the fuel injection pump is ensured, and a pressure difference is created between the fuel oil supply pipe side and the return pipe side to circulate the fuel to the fuel injection valve. The fuel oil pressure regulating valve (overflow valve) is
It is installed at the boundary between these fuel oil supply pipes and return pipes.
発明が解決しようとする課題
しかしながら、上記従来のデイーゼル機関など
の内燃機関の燃料供給装置では、次のような問題
が発生している。すなわち、
(1) 燃料油圧力調整弁のために、燃料油供給管路
側の管系が閉塞状態となり、燃料噴射ポンプに
よる燃料の吸入、吐出の際に水撃作用を起こす
ことになる。この水撃作用によつて燃料油供給
管路に脈動が生じ、この脈動に帰因して系内の
配管部品、機器類が破損するおそれがある。こ
のため、従来の装置では、水撃作用を防止する
ためのシヨツクダンパーを設けなければならな
いという不便がある。また、
(2) 気液分離装置は大気に開放されているため、
その内部で燃料油中の揮発分、水分のフラツシ
ングが起こるおそれがある。このフラツシング
により、空気抜き管から燃料油が吹き出した
り、また燃料油供給ポンプがキヤビテーシヨン
にもとづく吸引不能を起こしたりするという問
題がある。Problems to be Solved by the Invention However, the following problems occur in the conventional fuel supply device for an internal combustion engine such as a diesel engine. That is, (1) the fuel oil pressure regulating valve causes the pipe system on the fuel oil supply pipe side to be in a blocked state, causing a water hammer effect when the fuel injection pump takes in and discharges fuel. This water hammer effect causes pulsation in the fuel oil supply pipe, and this pulsation may cause damage to piping parts and equipment within the system. For this reason, the conventional device has the inconvenience of having to provide a shock damper to prevent the water hammer effect. In addition, (2) the gas-liquid separator is open to the atmosphere;
Flushing of volatile matter and moisture in the fuel oil may occur inside the fuel oil. This flushing causes problems such as fuel oil blowing out from the air vent pipe and the fuel oil supply pump becoming unable to suction due to cavitation.
そこで本発明はこのような問題点を解決し、水
撃作用の発生の原因となる燃料油圧力調整弁を廃
止できるようにするとともに、有害なフラツシン
グの発生を防止できるようにすることを目的とす
る。 Therefore, the present invention aims to solve these problems, to make it possible to eliminate the fuel oil pressure regulating valve that causes the water hammer effect, and to prevent the occurrence of harmful flushing. do.
課題を解決するための手段
このため本発明は、燃料油サービスタンクから
の燃料油層と、空気ラインからの加圧空気層とを
有する密閉式バツフアタンクを設け、このバツフ
アタンクからの燃料油供給管路とこのバツフアタ
ンクへの燃料油戻り管路とにより燃料油循環管路
を構成し、燃料噴射弁と燃料噴射ポンプとを有す
る燃料油噴射管路を前記燃料油循環管路に並設
し、前記燃料油噴射管路に燃料油を循環させる燃
料油循環ポンプを、この燃料油噴射管路中に介装
したものである。Means for Solving the Problems Therefore, the present invention provides a sealed buffer tank having a fuel oil layer from a fuel oil service tank and a pressurized air layer from an air line, and a fuel oil supply pipe line from the buffer tank. The fuel oil return pipe to the buffer tank constitutes a fuel oil circulation pipe, and a fuel oil injection pipe having a fuel injection valve and a fuel injection pump is arranged in parallel with the fuel oil circulation pipe, and the fuel oil A fuel oil circulation pump that circulates fuel oil through the injection pipe is interposed in the fuel oil injection pipe.
作 用
このような構成によれば、燃料油循環ポンプに
より燃料噴射弁へ燃料油が循環されるため、従来
のようにこの燃料油を循環させるための圧力差発
生用の燃料油供給圧力調整弁が必要なくなり、こ
の燃料油供給圧力調整弁を廃止されることによつ
て水撃作用の発生が防止される。さらに密閉加圧
式のバツフアタンクを設けたためこのバツフアタ
ンク内における燃料油中の揮発分、水分のフラツ
シングが防止される。しかも加圧式としたため燃
料油を加熱してその粘度を下げることができ、こ
のため粘度の高い低質油にも十分対応できること
になる。According to such a configuration, since the fuel oil is circulated to the fuel injection valve by the fuel oil circulation pump, the fuel oil supply pressure regulating valve for generating a pressure difference for circulating this fuel oil is required as in the past. By eliminating the need for this fuel oil supply pressure regulating valve, water hammer can be prevented from occurring. Further, since a sealed and pressurized buffer tank is provided, flushing of volatile matter and moisture in the fuel oil in the buffer tank is prevented. In addition, since it is a pressurized type, it is possible to heat the fuel oil and lower its viscosity, making it fully compatible with low-quality oil with high viscosity.
実施例
以下、本発明の一実施例を図面にもとづいて説
明する。図面において、１は燃料油２を蓄えてお
くための燃料油サービスタンクであり、濾過器
３、複式の燃料油供給ポンプ４および流量計５を
介して、バツフアタンク６に燃料油２を供給可能
なように構成されている。ポンプ４と流量計５と
の中間から燃料油戻り管７が分岐されており、こ
の燃料油戻り管７には、バツフアタンク６内の燃
料油レベル検出器８からの信号により作動される
油面調整弁９が介装されている。１０は燃料油サ
ービスタンク１のエア逃がし管である。Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. In the drawing, 1 is a fuel oil service tank for storing fuel oil 2, and the fuel oil 2 can be supplied to a buffer tank 6 via a filter 3, a dual fuel oil supply pump 4, and a flow meter 5. It is configured as follows. A fuel oil return pipe 7 is branched from between the pump 4 and the flow meter 5, and this fuel oil return pipe 7 has an oil level adjustment device operated by a signal from a fuel oil level detector 8 in the buffer tank 6. A valve 9 is interposed. 10 is an air relief pipe for the fuel oil service tank 1.
上記バツフアタンク６は密閉構造となつてお
り、燃料油サービスタンク１からの燃料油層１１
と、空気ライン１２からの加圧空気層１３とを有
している。空気ライン１２において、１４は加圧
空気層１３の圧力検出器１５により作動されるス
ピル・メークアツプ型圧力調整弁である。この圧
力調整弁１４からの配管１６は、バツフアタンク
６の安全弁１７からの配管１８とともに燃料油サ
ービスタンク１に接続され、大気に開放されてい
る。なお、１９はバツフアタンク６内の燃料油層
１１を加熱／保熱するための加熱器であり、燃料
油層１１の温度検出器２０により作動される温度
調整弁２１から、加熱用蒸気が供給されるもので
ある。 The buffer tank 6 has a sealed structure, and the fuel oil layer 11 from the fuel oil service tank 1
and a pressurized air layer 13 from the air line 12. In the air line 12, 14 is a spill-make-up type pressure regulating valve operated by a pressure sensor 15 in the pressurized air layer 13. A pipe 16 from this pressure regulating valve 14 is connected to the fuel oil service tank 1 together with a pipe 18 from a safety valve 17 of the buffer tank 6, and is open to the atmosphere. In addition, 19 is a heater for heating/thermalizing the fuel oil layer 11 in the buffer tank 6, and heating steam is supplied from a temperature regulating valve 21 operated by a temperature sensor 20 of the fuel oil layer 11. It is.
バツフアタンク６からデイーゼル機関本体２２
に向けて燃料油供給管路２３が接続されている。
この燃料油供給管路２３には、複列の燃料油循環
ポンプ２４、燃料油加熱器２５および粘度調整装
置２６がこの順に介装されている。加熱器２５に
は、粘度調整装置２６からの信号により作動され
る温度調整弁２７から、加熱用の蒸気が供給され
ている。一方燃料油供給管路２３には、バツフア
タンク６への燃料油戻り管路２８が接続されてお
り、全体として燃料油循環管路２９が構成されて
いる。 From the buffer tank 6 to the diesel engine body 22
A fuel oil supply pipe 23 is connected to the fuel oil supply pipe 23.
This fuel oil supply pipe 23 is provided with a double-row fuel oil circulation pump 24, a fuel oil heater 25, and a viscosity adjusting device 26 in this order. Steam for heating is supplied to the heater 25 from a temperature control valve 27 operated by a signal from a viscosity control device 26 . On the other hand, a fuel oil return pipe 28 to the buffer tank 6 is connected to the fuel oil supply pipe 23, and a fuel oil circulation pipe 29 is constituted as a whole.
デイーゼル機関本体２２における燃料油循環管
路２９には、燃料噴射ポンプ３０および燃料噴射
弁３１を有する燃料油噴射管路３２が並設されて
いる。この燃料油噴射管路３２の始端部には、燃
料油供給管路２３の燃料油をこの燃料油噴射管路
３２に加圧供給するための燃料油循環ポンプ３３
が配設されており、その吐出圧力は、燃料油噴射
管路３２の管路抵抗を上回る値（約２Kg/cm3）に
設定されている。このポンプ３３には、燃料噴射
ポンプ３０の流量変動に対処できるように、遠心
型ポンプが利用されている。 A fuel oil injection pipe 32 having a fuel injection pump 30 and a fuel injection valve 31 is arranged in parallel with the fuel oil circulation pipe 29 in the diesel engine main body 22 . At the starting end of this fuel oil injection pipe 32, there is a fuel oil circulation pump 33 for pressurizing and supplying the fuel oil in the fuel oil supply pipe 23 to this fuel oil injection pipe 32.
is provided, and its discharge pressure is set to a value (approximately 2 Kg/cm 3 ) that exceeds the line resistance of the fuel oil injection line 32. A centrifugal pump is used as the pump 33 in order to cope with fluctuations in the flow rate of the fuel injection pump 30.
上記構成における作用を説明する。燃料油サー
ビスタンク１の燃料油２は、燃料油供給ポンプ４
により機関での消費量以上に吐出され、バツフア
タンク６の油面レベルを一定に保持して、その余
剰分は油面調整弁９でサービスタンク１へ循環さ
れる。このことにより、バツフアタンク６への燃
料油の供給量は、その時の機関の消費量に等しい
量とすることができ、流量計５によつて正確に消
費量を計測できる。 The operation of the above configuration will be explained. The fuel oil 2 in the fuel oil service tank 1 is supplied to the fuel oil supply pump 4.
The oil is discharged in excess of the amount consumed by the engine, and the oil level in the buffer tank 6 is maintained constant, and the surplus is circulated to the service tank 1 by the oil level adjustment valve 9. As a result, the amount of fuel oil supplied to the buffer tank 6 can be made equal to the consumption amount of the engine at that time, and the consumption amount can be accurately measured by the flow meter 5.
バツフアタンク６内の燃料油は、燃料油循環ポ
ンプ２４により機関での消費量以上に吐出され、
燃料油加熱器２５および粘度調整装置２６によ
り、機関の燃焼に最適な粘度になるよう加熱、調
整される。この加熱、調整後の燃料油は燃料油循
環ポンプ３３により燃料噴射ポンプ３０へ圧送さ
れ、燃料噴射弁３１から噴射されて機関内で燃焼
される。また、燃料噴射弁３１の閉止寺および機
関停止時（始動前）には、燃料油循環ポンプ３３
により燃料噴射弁３１に燃料油を循環させる。燃
料油循環管路２９を循環する余剰の燃料油、およ
び燃料油噴射管路３２からの余剰の燃料油は、と
もに燃料油戻り管路２８を経てバツフアタンク６
へ戻される。 The fuel oil in the buffer tank 6 is discharged by the fuel oil circulation pump 24 in an amount exceeding the amount consumed by the engine.
The fuel oil heater 25 and viscosity adjustment device 26 heat and adjust the viscosity to the optimum viscosity for combustion in the engine. The heated and adjusted fuel oil is pressure-fed to the fuel injection pump 30 by the fuel oil circulation pump 33, injected from the fuel injection valve 31, and combusted within the engine. In addition, when the fuel injection valve 31 is closed and the engine is stopped (before starting), the fuel oil circulation pump 33
This causes fuel oil to circulate through the fuel injection valve 31. The surplus fuel oil circulating through the fuel oil circulation pipe 29 and the surplus fuel oil from the fuel oil injection pipe 32 are both sent to the buffer tank 6 via the fuel oil return pipe 28.
be returned to.
バツフアタンク６の内部は、圧力調整弁１４に
て圧縮空気を供給／排出することにより、燃料油
の使用温度における飽和蒸気圧以上に設定、保持
されており、燃料油中の揮発分、水分のフラツシ
ングが防止されている。よつて、フラツシングに
よる燃料油の噴出事故、燃料油循環ポンプ２４の
キヤビテーシヨンによるトラブルが防止されるこ
とになる。また、バツフアスペースを制御するこ
とにより、空気層１３が配管系の圧力変動を吸収
し、かつ燃料油層１１が流量変動を補うようにす
ることができるため、配管中の脈動を吸収除去で
きる。さらに、バツフアタンク６内を加圧状態に
することにより、加熱器１９を用いて、何ら問題
を伴わずに燃料油を昇温でき、機関の停止中およ
び始動前の系内燃料油を加熱／保熱できる。この
ように加圧および加熱を施すことにより、燃料油
の粘度を下げることができるため、燃料油の低質
化にも十分対応できるものである。 The inside of the buffer tank 6 is set and maintained at a pressure equal to or higher than the saturated vapor pressure at the operating temperature of the fuel oil by supplying/discharging compressed air using the pressure regulating valve 14, thereby flushing volatile matter and moisture in the fuel oil. is prevented. Therefore, fuel oil spout accidents due to flushing and troubles due to cavitation of the fuel oil circulation pump 24 are prevented. Furthermore, by controlling the buffer space, the air layer 13 can absorb pressure fluctuations in the piping system, and the fuel oil layer 11 can compensate for flow rate fluctuations, so that pulsations in the piping can be absorbed and eliminated. Furthermore, by pressurizing the inside of the buffer tank 6, the temperature of the fuel oil can be raised using the heater 19 without any problems, and the fuel oil in the system can be heated/maintained while the engine is stopped and before starting. It can be heated. By pressurizing and heating in this manner, the viscosity of the fuel oil can be lowered, so that it can sufficiently cope with lowering the quality of the fuel oil.
発明の効果
以上述べたように本発明によると、燃料油循環
ポンプの利用により、従来のような燃料油供給圧
力調整弁を廃止できて水撃作用の発生を防止で
き、さらに密閉加圧式のバツフアタンクを設けた
ため、このバツフアタンク内における燃料油中の
揮発分、水分のフラツシングを防止でき、しかも
加圧式としたため燃料油を加熱してその粘度を下
げることができ、このため粘度の高い低質油にも
十分対応できる。Effects of the Invention As described above, according to the present invention, by using a fuel oil circulation pump, it is possible to eliminate the conventional fuel oil supply pressure regulating valve, thereby preventing the occurrence of water hammer, and furthermore, it is possible to eliminate the need for a conventional fuel oil supply pressure regulating valve. This design prevents the volatile matter and moisture in the fuel oil from flushing inside the buffer tank, and the pressurized type heats the fuel oil to lower its viscosity. I can handle it well.
図面は本発明の一実施例の概略構成を示す図で
ある。
１…燃料油サービスタンク、６…バツフアタン
ク、１１…燃料油層、１２…空気ライン、１３…
加圧空気層、２３…燃料油供給管路、２８…燃料
油戻り管路、２９…燃料油循環管路、３０…燃料
噴射ポンプ、３１…燃料噴射弁、３２…燃料油噴
射管路、３３…燃料油循環ポンプ。
The drawings are diagrams showing a schematic configuration of an embodiment of the present invention. 1...Fuel oil service tank, 6...Buffer tank, 11...Fuel oil layer, 12...Air line, 13...
Pressurized air layer, 23... Fuel oil supply pipe, 28... Fuel oil return pipe, 29... Fuel oil circulation pipe, 30... Fuel injection pump, 31... Fuel injection valve, 32... Fuel oil injection pipe, 33 ...Fuel oil circulation pump.
Claims (1)
気ラインからの加圧空気層とを有する密閉式バツ
フアタンクを設け、このバツフアタンクからの燃
料油供給管路とこのバツフアタンクへの燃料油戻
り管路とにより燃料油循環管路を構成し、燃料噴
射弁と燃料噴射ポンプとを有する燃料油噴射管路
を前記燃料油循環管路に並設し、前記燃料油噴射
管路に燃料油を循環させる燃料油循環ポンプを、
この燃料油噴射管路中に介装したことを特徴とす
る内燃機関の燃料供給装置。1. A closed buffer tank having a fuel oil layer from a fuel oil service tank and a pressurized air layer from an air line is provided, and a fuel oil supply pipe from this buffer tank and a fuel oil return pipe to this buffer tank supply fuel. A fuel oil circulation system in which a fuel oil injection pipe constituting an oil circulation pipe and having a fuel injection valve and a fuel injection pump is arranged in parallel with the fuel oil circulation pipe, and fuel oil is circulated through the fuel oil injection pipe. pump,
A fuel supply device for an internal combustion engine, characterized in that it is interposed in the fuel oil injection pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14795582A JPS5937258A (en) | 1982-08-25 | 1982-08-25 | Fuel supplying apparatus for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14795582A JPS5937258A (en) | 1982-08-25 | 1982-08-25 | Fuel supplying apparatus for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5937258A JPS5937258A (en) | 1984-02-29 |
| JPH0134297B2 true JPH0134297B2 (en) | 1989-07-18 |
Family
ID=15441858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14795582A Granted JPS5937258A (en) | 1982-08-25 | 1982-08-25 | Fuel supplying apparatus for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5937258A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61118552A (en) * | 1984-11-13 | 1986-06-05 | Sanshin Ind Co Ltd | Fuel injection system for outer board motor |
| GB2407802A (en) * | 2003-11-05 | 2005-05-11 | Bombardier Transp Gmbh | Buffer fuel tank arrangement for rail vehicle |
| CN100376808C (en) * | 2005-11-18 | 2008-03-26 | 三一重工股份有限公司 | Pressurizing oil tank of concrete pump |
-
1982
- 1982-08-25 JP JP14795582A patent/JPS5937258A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5937258A (en) | 1984-02-29 |
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