JPS639639A - Fuel supply control device of diesel engine - Google Patents

Fuel supply control device of diesel engine

Info

Publication number
JPS639639A
JPS639639A JP61150817A JP15081786A JPS639639A JP S639639 A JPS639639 A JP S639639A JP 61150817 A JP61150817 A JP 61150817A JP 15081786 A JP15081786 A JP 15081786A JP S639639 A JPS639639 A JP S639639A
Authority
JP
Japan
Prior art keywords
fuel
injection pump
fuel injection
water
emulsion
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
JP61150817A
Other languages
Japanese (ja)
Other versions
JP2561820B2 (en
Inventor
Masatoshi Shimoda
正敏 下田
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.)
Hino Motors Ltd
Original Assignee
Hino Motors 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 Hino Motors Ltd filed Critical Hino Motors Ltd
Priority to JP61150817A priority Critical patent/JP2561820B2/en
Publication of JPS639639A publication Critical patent/JPS639639A/en
Application granted granted Critical
Publication of JP2561820B2 publication Critical patent/JP2561820B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022Adding fuel and water emulsion, water or steam
    • F02M25/0228Adding fuel and water emulsion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022Adding fuel and water emulsion, water or steam
    • F02M25/0227Control aspects; Arrangement of sensors; Diagnostics; Actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Abstract

PURPOSE:To improve exhaust gas purification performance by adjusting the position of the control rack of a fuel injection pump according to the detected result after detecting the water ratio in emulsion fuel, in a engine which uses emulsion fuel in which water is dispersed in light oil. CONSTITUTION:A permittivity sensor 24 and a temperature sensor 25 are provided in fuel supply system to detect water ratio in emulsion fuel from a mixing tank 21 by means of a microcomputer 18 according to detected signals from those sensors. And it is made possible to feed optimum fuel, according to this water ratio, to a injector from a fuel injection pump 11 by moving a control rack 14 according to water ratio. And it is also mode possible, to feed light oil in a fuel tank 19 to the fuel injection pump 11 directly by providing solenoid valves 22, 23 between the fuel injection pump 11 and the mixing tank 21 a fuel tank 19 respectively and setting the solenoid 22 to close and solenoid 23 to open if necessary.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

本発明はディーゼルエンジンの燃料の供給制御装置に係
り、特に排気ガス中の窒素酸化物を低減するために、軽
油中に水を分散させたエマルジョン燃料を燃料噴射ポン
プを介してエンジンに供給するようにした装置に関する
。 K発明の概要】 本発明は、エマルジョン燃料中の水の割合を検出するセ
ンサを設け、このセンサの検出に応じて電子ガバナを用
いて燃料噴射ポンプのコントロールラックの位置を調整
することによって、燃料の状態に応じて最適な量の燃料
の供給を行なうことを可能にしたものである。 K従来の技術】 ディーゼルエンジンの排気ガス中の窒素酸化物の量を低
減するための一般的な方法は、燃料の噴射のタイミング
を遅らせることである。しかしこのような方法は安定な
燃料の燃焼を妨げる可能性があり、また燃料消費率の悪
化および黒煙の増大を伴うために限界がある。そこで例
えば「自動車技術会論文集41978年NO,16、第
30頁〜第37頁に示されるように、軽油中に水を分散
したエマルジョン燃料を使用することによって、排気ガ
ス中の窒素酸化物の量を低減する試みがなされている。 軽油燃料中に水を分散させることによって、燃料の燃焼
温度が低下し、窒素酸化物が低減することになり、直噴
型ディーゼルエンジンにおける窒素酸化物の低減に有効
である。
The present invention relates to a fuel supply control device for a diesel engine, and in particular, in order to reduce nitrogen oxides in exhaust gas, an emulsion fuel in which water is dispersed in light oil is supplied to the engine via a fuel injection pump. related to the equipment used. KSummary of the Invention The present invention provides a sensor that detects the proportion of water in emulsion fuel, and adjusts the position of the control rack of the fuel injection pump using an electronic governor in accordance with the detection of this sensor. This makes it possible to supply the optimum amount of fuel depending on the state of the vehicle. BACKGROUND OF THE INVENTION A common method for reducing the amount of nitrogen oxides in the exhaust gas of a diesel engine is to retard the timing of fuel injection. However, such a method has its limitations because it may hinder stable fuel combustion, and is accompanied by deterioration in fuel consumption rate and increase in black smoke. For example, as shown in ``Transactions of the Society of Automotive Engineers of Japan, 41978, No. 16, pages 30 to 37, by using emulsion fuel in which water is dispersed in light oil, nitrogen oxides in exhaust gas can be reduced. Attempts have been made to reduce the amount of nitrogen oxides in direct-injection diesel engines by dispersing water in diesel fuel, which lowers the combustion temperature of the fuel and reduces nitrogen oxides. It is effective for

【発明が解決しようとする問題点】[Problems to be solved by the invention]

ところがこのようなエマルジョン燃料をディーゼルエン
ジンに使用すると、排気ガス中の窒素酸化物の量を低減
することが可能になっても、エンジンの始動性が悪化す
ることになる。このような始動性の悪化を防止するため
に、エマルジョン燃料と通常の燃料の2系統の燃料系統
を設ける必要がある。ところがこのように2系統の燃料
系統を設けるようにすると、エマルジョン燃料と通常の
燃料とでは、燃料噴射ポンプのコントロールラックの位
置が異なるために、特に車両用エンジンとして成立しな
くなるという問題がある。 本発明はこのような問題点に鑑みてなされたものであっ
て、燃料の状態に応じて燃料噴射ポンプのコントロール
ラックの位置を調整することによって、2系統の燃料の
供給系を有するディーゼルエンジンを車両用エンジンと
して成立し得るようにした燃料の供給制御装置を提供す
ることを目的とするものである。
However, when such an emulsion fuel is used in a diesel engine, even if it becomes possible to reduce the amount of nitrogen oxides in the exhaust gas, the startability of the engine deteriorates. In order to prevent such deterioration in startability, it is necessary to provide two fuel systems, one for emulsion fuel and one for normal fuel. However, if two fuel systems are provided in this way, there is a problem that the position of the control rack of the fuel injection pump is different between the emulsion fuel and the normal fuel, which makes the fuel injection pump ineffective as a vehicle engine. The present invention was made in view of these problems, and it is possible to operate a diesel engine having two fuel supply systems by adjusting the position of the control rack of the fuel injection pump according to the fuel condition. It is an object of the present invention to provide a fuel supply control device that can be used as a vehicle engine.

【問題点を解決するための手段】[Means to solve the problem]

本発明は、軽油中に水を分散させたエマルジョン燃料を
燃料噴射ポンプを介してエンジンに供給するようにした
装置において、前記エマルジョン燃料中の水の割合を検
出するセンサを設け、このセンサの検出に応じて電子ガ
バナを用いて前記燃料噴射ポンプのコントロールラック
の位置を調整するようにしたものである。
The present invention provides a device for supplying emulsion fuel in which water is dispersed in light oil to an engine via a fuel injection pump, which is provided with a sensor for detecting the proportion of water in the emulsion fuel; The position of the control rack of the fuel injection pump is adjusted using an electronic governor according to the fuel injection pump.

【作用】[Effect]

従って本発明によれば、燃料中の水の割合がセンサによ
って検出されることになり、このセンサの検出に応じて
電子ガバナを用いて燃料噴射ポンプのコントロールラッ
クの位置を調整することによって、燃料中の水の割合に
応じて燃料の供給量を最適な値に制御することが可能に
なる。 K実施例1 以下本発明を図示の一実施例につき説明する。 図面はエマルジョン燃料によって運転されるディーゼル
エンジン10を示すものであって、このエンジン10は
燃料噴射ポンプ11を備えている。 そして燃料噴射ポンプ11のカムシャフト12はタイマ
13を介してエンジンによって駆動されるようになって
おり、タイマ13が噴射時期を調整するようになってい
る。また燃料噴射ポンプ11はバレルの回転位置を制御
するコント0−ルラツク14を備えており、電子ガバナ
15によって移動されるようになっている。そしてロー
ドセンサ16および回転検出センサ17の検出に応じて
、マイクロコンピュータ18が電子ガバナ15の制御を
行なうようになっている。 つぎにこのエンジン10の燃料噴射ポンプ11に供給さ
れる燃料の供給系について説明すると、軽油を蓄えてお
く燃料タンク1つと水タンク20とをそれぞれ備えるよ
うになっており、両者は混合タンク21に接続されてい
る。混合タンク21は燃料タンク19から供給される軽
油中に水タンク20から供給される水を混ぜて界面活性
剤を添加し、エマルジョン燃料を蓄えておくようになっ
ている。そして混合タンク21は電磁弁22を介して燃
料噴射ポンプ11に燃料を供給するようになっている。 そして別の電磁弁23を介して上記燃料タンク19が燃
料噴射ポンプ11と直接接続されるようになっている。 また電磁弁22.23と燃料噴射ポンプ11との間には
誘電率センサ24が接続されるようなっている。 以上のような構成において、特に燃料噴射ポンプ11へ
燃料を供給する燃料供給系に誘電率センサ24と温度セ
ンサ、25とが設けられるようになっている。そしてセ
ンサ24.25によって水分の割合が検出されることに
なる。すなわち温度がわかっていれば軽油と水とでは誘
電率が異なるために、燃料中にどのくらい水が含まれて
いるかどうかを識別することが可能になる。そして水分
の割合に応じて燃料噴射ポンプ11が噴射する燃料の供
給量を制御することが可能になる。マイクロコンピュー
タ18はロードセンサ16、および回転検出センサ17
のみならず、誘電率センサ24の検出出力を読込むとと
もに、これらの検出に応じて電子ガバナ15を制御する
ことになる。従って電子ガバナ15が燃料中の水分の割
合に応じてコントロールラック14を移動させるように
なり、これによって水分の割合に応じて最適な量の燃料
を燃料噴射ポンプ11がエンジン10の各シリンダに設
けられているインジェクタに供給することになり、これ
らのインジェクタを通してシリンダ内に燃料の噴射が行
なわれるようになる。 ざらに本実施例に係る燃料の供給制御l]装置によれば
、燃料噴射ポンプ11と燃料タンク21との間には電磁
弁22が接続されるとともに、電磁弁23を介して燃料
噴射ポンプ11に燃料タンク19が接続されるようにな
っている。従って必要に応じて電磁弁22を閉じて電磁
弁23を開くことにより、燃料タンク1つ内の軽油を直
接燃料噴射ポンプ11に供給することが可能になる。す
なわち始動時や低温軽負荷時あるいはエンジン10の冷
加水の水温が低い場合には、燃料タンク19内の軽油の
みによってエンジン1oの運転を行なうことが可能にな
る。なおこのときには電子ガバナ15によって軽油燃料
が適正な口だけ供給されるようになる。これによってエ
マルジョン燃料を用いたディーゼルエンジンの始動性の
悪化を改善することが可能になる。そしてこのような純
燃料による運転を行なっている間にエマルジョン燃料の
使用が可能な状態になった場合には、電磁弁23を閉じ
るとともに電磁弁22を開くことによって、エマルジョ
ン燃料による運転に切換えることが可能になる。そして
この場合には、誘電率センサ24を用いて上記のように
燃料の供給量の制御を行なうことが可能になる。
Therefore, according to the present invention, the proportion of water in the fuel is detected by the sensor, and the electronic governor is used to adjust the position of the control rack of the fuel injection pump in accordance with the detection of the sensor. It becomes possible to control the amount of fuel supplied to an optimal value depending on the proportion of water in the fuel. KEmbodiment 1 The present invention will be described below with reference to an illustrated embodiment. The drawing shows a diesel engine 10 operated on emulsion fuel, and this engine 10 is equipped with a fuel injection pump 11. The camshaft 12 of the fuel injection pump 11 is driven by the engine via a timer 13, and the timer 13 adjusts the injection timing. The fuel injection pump 11 also includes a control rack 14 for controlling the rotational position of the barrel, and is moved by an electronic governor 15. The microcomputer 18 controls the electronic governor 15 in response to detection by the load sensor 16 and the rotation detection sensor 17. Next, to explain the fuel supply system that is supplied to the fuel injection pump 11 of this engine 10, it is equipped with one fuel tank for storing light oil and a water tank 20, both of which are connected to a mixing tank 21. It is connected. The mixing tank 21 is configured to mix light oil supplied from the fuel tank 19 with water supplied from the water tank 20, add a surfactant, and store emulsion fuel. The mixing tank 21 is configured to supply fuel to the fuel injection pump 11 via a solenoid valve 22. The fuel tank 19 is directly connected to the fuel injection pump 11 via another solenoid valve 23. Further, a dielectric constant sensor 24 is connected between the electromagnetic valves 22 and 23 and the fuel injection pump 11. In the above configuration, a dielectric constant sensor 24 and a temperature sensor 25 are particularly provided in the fuel supply system that supplies fuel to the fuel injection pump 11. The moisture content is then detected by sensors 24 and 25. In other words, if the temperature is known, it is possible to determine how much water is contained in the fuel, since light oil and water have different dielectric constants. Then, it becomes possible to control the amount of fuel injected by the fuel injection pump 11 in accordance with the water content. The microcomputer 18 has a load sensor 16 and a rotation detection sensor 17.
In addition, the detection outputs of the dielectric constant sensor 24 are read, and the electronic governor 15 is controlled in accordance with these detections. Therefore, the electronic governor 15 moves the control rack 14 according to the moisture content in the fuel, and the fuel injection pump 11 supplies the optimum amount of fuel to each cylinder of the engine 10 according to the moisture content. The fuel is supplied to the injectors located in the cylinder, and fuel is injected into the cylinder through these injectors. Roughly speaking, according to the fuel supply control device according to the present embodiment, a solenoid valve 22 is connected between the fuel injection pump 11 and the fuel tank 21, and the fuel injection pump 11 is connected via the solenoid valve 23. A fuel tank 19 is connected to. Therefore, by closing the solenoid valve 22 and opening the solenoid valve 23 as necessary, it becomes possible to directly supply the light oil in one fuel tank to the fuel injection pump 11. That is, at the time of starting, at low temperature and light load, or when the temperature of the cooling water of the engine 10 is low, it becomes possible to operate the engine 1o using only the light oil in the fuel tank 19. In addition, at this time, the electronic governor 15 allows the light oil fuel to be supplied only to the appropriate amount. This makes it possible to improve the startability of diesel engines using emulsion fuel. If it becomes possible to use emulsion fuel during such pure fuel operation, the solenoid valve 23 is closed and the solenoid valve 22 is opened to switch to emulsion fuel operation. becomes possible. In this case, it becomes possible to control the amount of fuel supplied using the dielectric constant sensor 24 as described above.

【発明の効果】【Effect of the invention】

以上のように本発明は、エマルジョン燃料中の水の割合
を検出するセンサを設け、このセンサの検出に応じて電
子ガバナを用いて燃料噴射ポンプのコントロールラック
の位置を調整するようにしたものである。従ってこのよ
うな構成によれば、燃料中の水分の割合に応じて最適な
けの燃料を供給することが可能になる。
As described above, the present invention is provided with a sensor that detects the proportion of water in emulsion fuel, and uses an electronic governor to adjust the position of the control rack of the fuel injection pump in accordance with the detection by this sensor. be. Therefore, according to such a configuration, it becomes possible to supply the optimum amount of fuel depending on the water content ratio in the fuel.

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

図面は本発明の一実施例に係る供給制御装置を備えるデ
ィーゼルエンジンの正面図である。 なお図面に用いた符号において、 10・・・ディーゼルエンジン 11・・・燃料噴射ポンプ 14・・・コントロールラック 15・・・電子ガバナ 18・・・マイクロコンピュータ 19・・・燃料タンク 20・・・水タンク 21・・・混合タンク 22.23・・・電磁弁 24・・・誘電率センサ 25・・・温度センサ である。
The drawing is a front view of a diesel engine equipped with a supply control device according to an embodiment of the present invention. In addition, in the symbols used in the drawings, 10...Diesel engine 11...Fuel injection pump 14...Control rack 15...Electronic governor 18...Microcomputer 19...Fuel tank 20...Water Tank 21... Mixing tank 22, 23... Solenoid valve 24... Dielectric constant sensor 25... Temperature sensor.

Claims (1)

【特許請求の範囲】[Claims] 軽油中に水を分散させたエマルジョン燃料を燃料噴射ポ
ンプを介してエンジンに供給するようにした装置におい
て、前記エマルジョン燃料中の水の割合を検出するセン
サを設け、このセンサの検出に応じて電子ガバナを用い
て前記燃料噴射ポンプのコントロールラックの位置を調
整するようにしたことを特徴とするディーゼルエンジン
の燃料の供給量制御装置。
In a device that supplies emulsion fuel in which water is dispersed in light oil to an engine via a fuel injection pump, a sensor is provided to detect the proportion of water in the emulsion fuel, and an electronic A fuel supply amount control device for a diesel engine, characterized in that the position of the control rack of the fuel injection pump is adjusted using a governor.
JP61150817A 1986-06-27 1986-06-27 Fuel supply control device for diesel engine Expired - Lifetime JP2561820B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61150817A JP2561820B2 (en) 1986-06-27 1986-06-27 Fuel supply control device for diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61150817A JP2561820B2 (en) 1986-06-27 1986-06-27 Fuel supply control device for diesel engine

Publications (2)

Publication Number Publication Date
JPS639639A true JPS639639A (en) 1988-01-16
JP2561820B2 JP2561820B2 (en) 1996-12-11

Family

ID=15505060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61150817A Expired - Lifetime JP2561820B2 (en) 1986-06-27 1986-06-27 Fuel supply control device for diesel engine

Country Status (1)

Country Link
JP (1) JP2561820B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041650U (en) * 1990-04-19 1992-01-08
JPH05231247A (en) * 1991-07-31 1993-09-07 Mitsubishi Automob Eng Co Ltd Emulsion fuel engine
WO1998013595A1 (en) * 1996-09-24 1998-04-02 Caterpillar Inc. Aqueous fuel emulsion identification system and anti-tampering device for an internal combustion engine
WO1998013598A1 (en) * 1996-09-24 1998-04-02 Caterpillar Inc. Fuel identification and control system for an internal combustion engine using an aqueous fuel emulsion
WO2010038420A1 (en) * 2008-09-30 2010-04-08 川崎重工業株式会社 Method for controlling operation of diesel engine, apparatus for controlling operation of diesel engine, diesel engine, and ship

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933392A (en) * 1982-08-16 1984-02-23 Imabari Zosen Kk Mixer/feeder for water and fuel oil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933392A (en) * 1982-08-16 1984-02-23 Imabari Zosen Kk Mixer/feeder for water and fuel oil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041650U (en) * 1990-04-19 1992-01-08
JPH05231247A (en) * 1991-07-31 1993-09-07 Mitsubishi Automob Eng Co Ltd Emulsion fuel engine
WO1998013595A1 (en) * 1996-09-24 1998-04-02 Caterpillar Inc. Aqueous fuel emulsion identification system and anti-tampering device for an internal combustion engine
WO1998013598A1 (en) * 1996-09-24 1998-04-02 Caterpillar Inc. Fuel identification and control system for an internal combustion engine using an aqueous fuel emulsion
WO2010038420A1 (en) * 2008-09-30 2010-04-08 川崎重工業株式会社 Method for controlling operation of diesel engine, apparatus for controlling operation of diesel engine, diesel engine, and ship
JP2010084668A (en) * 2008-09-30 2010-04-15 Kawasaki Heavy Ind Ltd Operation control method and operation control device of diesel engine, and the diesel engine
KR101246386B1 (en) * 2008-09-30 2013-03-22 카와사키 주코교 카부시키 카이샤 Method for controlling operation of diesel engine, apparatus for controlling operation of diesel engine, diesel engine, and ship

Also Published As

Publication number Publication date
JP2561820B2 (en) 1996-12-11

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