JPS5939947A - Fuel feed device for dual-fuel engine - Google Patents
Fuel feed device for dual-fuel engineInfo
- Publication number
- JPS5939947A JPS5939947A JP57149469A JP14946982A JPS5939947A JP S5939947 A JPS5939947 A JP S5939947A JP 57149469 A JP57149469 A JP 57149469A JP 14946982 A JP14946982 A JP 14946982A JP S5939947 A JPS5939947 A JP S5939947A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- engine
- gas
- dual
- load
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 137
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 230000009977 dual effect Effects 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/061—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
- F02D19/105—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
Description
【発明の詳細な説明】
本発明は、燃料噴射ポンプを有す′る液体燃料供給系統
とガスｆＩ量弁を有するガス燃料供給系統とを備え、前
記燃料噴射ポンプとガス調量弁を適宜罠制御することに
よジエンジンを、液体燃料のみを使用するディーゼル運
転とガス燃料と少量の液体燃料を使用するデュアル運転
とにその運転状態を切換えることができるようにしたデ
ュアルツユエル機関の燃料供給装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a liquid fuel supply system having a fuel injection pump and a gas fuel supply system having a gas metering valve, and the fuel injection pump and the gas metering valve are connected to each other as appropriate. Fuel supply for a dual twin engine that can be controlled to switch the operating state of the engine between diesel operation, which uses only liquid fuel, and dual operation, which uses gas fuel and a small amount of liquid fuel. It is related to the device.
この種のデュアルツユエル機関においては、第３図に示
す如くエンジン負荷が低負荷になる程燃料消費率（、！
ｉＩ／ｐｓ・ｈ）が悪ぐなり、しかも各負荷における燃
料消費率の変化傾向は、低負荷時においてはガス燃料と
液体燃料の混合燃料中に占める液体燃料の比率が＾くな
る程燃料消費率が悪化し、全負荷時（定格負荷時）にお
いては液体燃料の比率がｊ〜１０９６の範囲にある場合
にその燃料消費率が最も良くなるという特性がある。従
って、全運転域を通しての燃料消費率を向上させるため
には、低負荷域における液体燃料の比率を全負荷時にお
けるそれよシも高比率側に設定すればよいことになる。In this type of dual fuel engine, as shown in Figure 3, the lower the engine load, the lower the fuel consumption rate (!
iI/ps・h) becomes worse, and the change trend in fuel consumption rate at each load is that at low loads, the higher the proportion of liquid fuel in the mixed fuel of gas fuel and liquid fuel, the more fuel consumption increases. When the ratio of liquid fuel is in the range of j to 1096 at full load (at rated load), the fuel consumption rate is the best. Therefore, in order to improve the fuel consumption rate throughout the entire operating range, it is sufficient to set the liquid fuel ratio in the low load range to a high ratio side as well as in the full load range.
しかるに、従来のこの種のデュアルツユエル機関におい
ては、液体燃料の比率をエンジン負荷の如何に拘わらず
５〜１０％の値、即ち、全負荷時において燃料消費率が
最良となるような比率に固定的に設定するようにしてい
たため、特に低負荷時における燃料消費率が悪いという
問題があった。However, in conventional dual fuel engines of this type, the ratio of liquid fuel is set to a value of 5 to 10% regardless of the engine load, that is, the ratio that gives the best fuel consumption rate at full load. Since the setting was fixed, there was a problem in that the fuel consumption rate was particularly poor at low loads.
ア
本発明は、上記の如き従来のデュ／ルノコーエル機関の
燃料供給装置の問題に鑑み、デュ／ル運転時罠おいて低
負荷時における液体燃料の比率を全負荷時におけるそれ
よりも高比率側に設定し得るようにすることによシ、特
に低負荷域における燃料消費率を向上せしめ得るように
したデュアル７ユ工ル機関の燃料供給装置を提供するこ
とを目的としてなされたものであって、頭婁の如き基本
構成を有するデュアルツユエル機関の燃料供給装置にお
いて、デュアル運転時においてエンジンの負荷が設定負
荷以下に下がった場合に燃料噴射ポンプの燃料噴射量を
増量して液体燃料とガス燃料の混合燃料中に占める液体
燃料の比率を定格負荷時における比率よりも適宜に高比
率側に設定し得るようにしたことを特徴とするものであ
る。A. In view of the above-mentioned problems with the conventional fuel supply system of the Du/Luno Coel engine, the present invention aims to set the ratio of liquid fuel at low load to a higher ratio than that at full load in the trap during Du/Lux operation. The purpose of this invention is to provide a fuel supply system for a dual 7 unit engine that can improve the fuel consumption rate, especially in a low load range, by making it possible to set In the fuel supply system of a dual fuel engine, which has a basic configuration similar to that of a head, when the engine load falls below the set load during dual operation, the fuel injection amount of the fuel injection pump is increased to supply liquid fuel and gas. The present invention is characterized in that the proportion of liquid fuel in the mixed fuel can be appropriately set higher than the proportion at rated load.
以下、本発明のデュアルツユエル機関の燃料供給装置を
第１実施例及び第コ実施例に基づいて説明すると、第１
図には本発明第１実施例に係るデュアルツユエル機関の
燃料供給装置ｚ１が示きれている。この燃料供給装置ｚ
１ば、圧縮点火式のエンジン／に液体燃料Ｆを供給゛ｆ
るための液体燃料供給系統Ｘとガス燃料Ｇを供給するた
めのガス燃料供給系統ＹのＪつの燃料供給系統を有して
おり、この２つの燃料供給系統Ｘ、Ｙをマイクロコンピ
ュータを内蔵した制御器７で適宜に制御することによジ
エンジン／を、液体燃料Ｆのみ全使用するいわゆるディ
ーゼル運転と、ガス燃料Ｇと少量の液体燃料Ｆの混合燃
料を使用するいわゆるデュアル運転とにその運転形態を
切換えることができるようになっている。Hereinafter, the fuel supply system for a dual fuel engine of the present invention will be explained based on the first embodiment and the third embodiment.
The figure does not fully show the fuel supply system z1 for a dual fuel engine according to the first embodiment of the present invention. This fuel supply device
1. Supplying liquid fuel F to a compression ignition engine.
It has J fuel supply systems: a liquid fuel supply system X for supplying gas fuel G, and a gas fuel supply system Y for supplying gas fuel G, and these two fuel supply systems By appropriately controlling the engine 7, the engine can be operated in a so-called diesel operation mode, in which only liquid fuel F is used, and in a so-called dual operation mode, in which a mixed fuel of gas fuel G and a small amount of liquid fuel F is used. It is now possible to switch between.
液体燃料供給系統Ｘは、エンジン／のシリンダに取付け
た燃料噴射弁（図示省略）に噴射管りを介して液体燃料
Ｆを圧送するための燃料噴射ポンプ２を有している。こ
の燃料噴射ポンプ２Ｆｉ、エンジン／がディーゼル運転
されている場合には図示しないガバナ装置によってエン
ジン／の運転状態（負荷、速度）！／Ｃ応じて噴射量が
制御され多量の液体燃料Ｆをシリンダ側に圧送する如く
作用し、また、エンジン／がデュアル運転されている場
合には制御器７によって制御される電子ガバナ３（以下
、これをポンプ用電子ガバナという）により噴射量が制
御され液体燃料Ｆを少量だけシリンダ側に圧送する如く
作用する。尚、デュアル運転時には図示しないガバナ装
置の作用は無効とされ燃料噴射量はポンプ用電子ガバナ
ＪＫよってのみ制御され、逆にディーゼル運転時にはポ
ンプ用電子ガバナ３の作用が無効とされ、この場合の噴
射量は図示しないガバナ装置のみによって制御される。The liquid fuel supply system X has a fuel injection pump 2 for pumping liquid fuel F to a fuel injection valve (not shown) attached to a cylinder of the engine via an injection pipe. When the fuel injection pump 2Fi and the engine are in diesel operation, a governor device (not shown) controls the operating state (load, speed) of the engine. The injection amount is controlled according to /C and acts to force-feed a large amount of liquid fuel F to the cylinder side, and when the engine / is in dual operation, an electronic governor 3 (hereinafter referred to as The injection amount is controlled by a pump electronic governor), which acts to force-feed a small amount of liquid fuel F to the cylinder side. In addition, during dual operation, the action of the governor device (not shown) is disabled and the fuel injection amount is controlled only by the pump electronic governor JK.On the other hand, during diesel operation, the action of the pump electronic governor 3 is disabled, and the injection amount in this case is The amount is controlled solely by a governor device, not shown.
又、デュアル運転時にエンジン／側に圧送される少量の
液体燃料Ｆは、ガス焼判Ｇ管着火させるためのものであ
シ、以下、この場合の液体燃料Ｆを特にパイロット油と
いう。ζらに、このパイロット油の噴射量は、エンジン
／の負荷状態に応じて全混合燃料中に占めるパイロット
油の比率として次の如く設定されている。即ち、中、高
負荷運転時には第３図に示す如く定格負荷時の全混合燃
料量の５〜１０％の値ａ１に設定し、低負荷運転時（例
えば３０％負荷以下）においては、中、高負荷運転時に
おける比率ａ、よシ適宜量だけ高比率側の値α、に設定
するようにしている。尚、このパイロット油の比率ａ１
、ａｌの切換えは、エンジン負荷に応じて制御器７によ
って切換制御される。Also, the small amount of liquid fuel F that is force-fed to the engine/side during dual operation is for igniting the gas embroider G tube, and hereinafter, the liquid fuel F in this case will be particularly referred to as pilot oil. In addition, the injection amount of this pilot oil is set as follows as a proportion of the pilot oil in the total mixed fuel depending on the load condition of the engine. That is, during medium and high load operation, the value a1 is set to 5 to 10% of the total mixed fuel amount at rated load as shown in Fig. 3, and during low load operation (for example, 30% load or less), the value a1 is set to 5 to 10% of the total mixed fuel amount at rated load. The ratio a during high-load operation is set to a value α on the high ratio side by an appropriate amount. In addition, this pilot oil ratio a1
, al are controlled by the controller 7 according to the engine load.
ガス燃料供給系統Ｙは、エンジン／の吸気管１０に合流
するガス供給管／／に、ガス燃料Ｇの供給圧力を検出す
るための圧力センサー乙と、電子ガバナｊ（以下、特に
弁用電子ガバナという）によって弁開度が制御されるガ
ス調量弁グを介設して構成されている。このガス調量弁
弘は、制御器７によって弁用電子ガバナｊを介してデュ
アル運転時には開弁し、ディーゼル運転時には閉弁する
如く制御され、しかも、その弁開度はエンジン／の負荷
に応じて適宜に設定される。The gas fuel supply system Y includes a pressure sensor B for detecting the supply pressure of the gas fuel G, and an electronic governor j (hereinafter, especially an electronic governor for valves) in the gas supply pipe // that joins the intake pipe 10 of the engine. It is constructed by interposing a gas metering valve whose opening degree is controlled by This gas metering valve is controlled by the controller 7 via the electronic valve governor J so that it opens during dual operation and closes during diesel operation, and the degree of opening of the valve is controlled according to the load of the engine. It is set appropriately.
又、デュアル運転時には、エンジン負荷に応じて前記液
体燃料供給系統Ｘのポンプ用電子ガノ（す３にパイロッ
ト油量を決定するための電気的信号を送る必要があシ、
図示実施例においてはエンジン／の負荷変動をガス調量
弁グの弁開度あるいは弁用電子ガバナｊの出力、即ち、
ガス燃料Ｇの供給量の変動としてとらえ、この検出結果
を制御器７に入力して該制御器７でポンプ用電子ガノく
す３をフィードバック制御するようにしている。In addition, during dual operation, it is necessary to send an electrical signal for determining the pilot oil amount to the pump electronic gun (S3) of the liquid fuel supply system X according to the engine load.
In the illustrated embodiment, the load fluctuation of the engine is determined by the valve opening of the gas metering valve or the output of the electronic valve governor j, that is,
This detection result is taken as a fluctuation in the supply amount of gas fuel G, and is inputted to the controller 7, which controls the electronic gas pump 3 for the pump in feedback.
続いて、この第１実施例の燃料供給装置の作用を説明す
ると、エンジン／の運転形態をディーゼル運転に設定す
ると、制御器７によって弁用電子ガバナｊを介してガス
調量弁グが閉弁されガス燃料Ｇの供給が遮断されると同
時に、ポンプ用電子ガバナ３０作用が無効にされ燃料噴
射エンジンは図示しないガバナ装置によって制御せしめ
られる。Next, to explain the operation of the fuel supply system of the first embodiment, when the engine operation mode is set to diesel operation, the gas metering valve is closed by the controller 7 via the electronic valve governor j. At the same time, the pump electronic governor 30 is disabled and the fuel injection engine is controlled by a governor device (not shown).
従って、エンジン／には液体燃料Ｆのみが供給され、エ
ンジン／はディーゼル運転される。Therefore, only liquid fuel F is supplied to engine/, and engine/ is operated as a diesel engine.
一方、エンジン／の運転形態をディーゼル運転からデュ
アル運転に切換え設定すると、制御器７により弁用電子
ガバナｊを介して〃ス調量弁グが開弁され、ガス供給管
／／から吸気管７０ケ介してエンジン／のシリンダ内に
ガス燃料Ｇが供給されると同時に、燃料噴射エンジンが
ポンプ用電子ガバナ３によって制御され所定計のパイロ
ット油がシリンダ内に供給される。従って、エンジン／
は、ガス燃料Ｇとパイロット油の混合燃料によってデュ
アル運転される。On the other hand, when the operating mode of the engine is switched from diesel operation to dual operation, the controller 7 opens the gas metering valve via the electronic valve governor, and the gas metering valve is opened from the gas supply pipe to the intake pipe 70. At the same time, the fuel injection engine is controlled by the pump electronic governor 3 and a predetermined amount of pilot oil is supplied into the cylinder. Therefore, the engine/
is dual-operated with a mixed fuel of gas fuel G and pilot oil.
デュアル運転中におけるパイロット油の噴射量は、制御
器７に、１：ｌ）エンジン／の負荷に応じて第３図に示
す如く低比率（Ｌ＋と高比率ａ、の！つの比率に切換制
御される。即ち、ガス調量弁≠の弁開度あるいは弁用電
子ガバナｊの出力によってエンジン／が中、高負荷運転
されていることを検知した場合には、制御器７によりポ
ンプ用電子ガバナ３を制御して燃料噴射ポンプλの噴射
量、即ち、パイロット油を全混合燃料に対する比率が低
比率山になるように制御する。従って、この場合には、
液体燃料Ｆの比率が低比率山の混合燃第１によってエン
ジン／がデュアル運転されることになる。一方、低負荷
（例えば３０％負荷以下）運転されている場合には、ポ
ンプ用電子ガバナ３を制御してパイロット油量が全混合
燃料中に占める比率が高な
比率ａ−１１Ｃ／ｌる如くパイロット油量を制御する。The amount of pilot oil to be injected during dual operation is controlled by the controller 7 to switch between two ratios: a low ratio (L+) and a high ratio a, as shown in FIG. That is, when it is detected that the engine is being operated at a medium or high load based on the valve opening degree of the gas metering valve ≠ or the output of the electronic valve governor j, the controller 7 controls the electronic pump governor 3. is controlled so that the injection amount of the fuel injection pump λ, that is, the ratio of pilot oil to the total mixed fuel, is controlled to a low ratio peak.Therefore, in this case,
The engine is dual-operated with the first mixed fuel in which the ratio of liquid fuel F is low. On the other hand, when operating at a low load (for example, 30% load or less), the pump electronic governor 3 is controlled so that the proportion of the pilot oil amount in the total mixed fuel is high, such as a-11C/l. Controls pilot oil amount.
従って、この場合には、エンジン／は液体燃料Ｆの比率
が高比率α、である混合燃料によってデュアル運転され
ることになる。Therefore, in this case, the engine / will be dual-operated with a mixed fuel in which the ratio of liquid fuel F is high ratio α.
仁のように、エンジン／の負荷に応じてパイロット油の
比率を変化させるようにすると、例えばエンジン負荷を
全負荷から低負荷側に次第に低下させると、第３図に示
す如く燃料消費率ｆが点ｂ１→点す、→点ｂ・→点り４
→点す、の如く変化し、パイロット油比率を低比率α８
で固定した場合に較べて、例えば、／ｊ％負荷時の燃料
消費率をｆ、からｆ、まで下げることができる。従って
、全負荷域を通しての燃料消費率がパイロット比率を固
定した場合に比して良好となる。If the ratio of pilot oil is changed according to the engine load, for example, if the engine load is gradually reduced from full load to low load, the fuel consumption rate f will decrease as shown in Figure 3. Point b1 → point, → point b・→ point 4
→ The light changes as shown below, and the pilot oil ratio is set to a low ratio α8.
For example, the fuel consumption rate at /j% load can be lowered from f to f, compared to the case where it is fixed at /j%. Therefore, the fuel consumption rate throughout the entire load range is better than when the pilot ratio is fixed.
尚、ガス燃料Ｇの供給圧力は退席λ１．５〜ｌ／、０ｋ
ＩＩ／ｃｒ＆の範囲に設定さり、るが、このガス燃料圧
力が最低圧力、；１．ｊ ｋ２ ／ （：ＴＩｌよシ低
下してガス燃料供給Ｍ。In addition, the supply pressure of gas fuel G is λ1.5~l/, 0k
II/cr&, but this gas fuel pressure is the lowest pressure;1. j k2 / (: TIl decreases and gas fuel supply M.
が減少した場合には、これを圧力セ”ンサー６で検知し
、仁の検出結呆罠基づいて制御器７によりエンジンの負
荷状態の如何に拘わらず液体燃料Ｆの噴射量を増大させ
てガス燃料Ｇの不足分を補填し１エンジン／のトルク低
下を防止するようになっている。When the amount of liquid fuel F decreases, this is detected by the pressure sensor 6, and the controller 7 increases the amount of liquid fuel F to be injected regardless of the engine load condition based on the detected failure trap. It is designed to compensate for the shortage of fuel G and prevent the torque from decreasing by 1/engine.
第２図には本発明第２実施例の燃料調量装置Ｚ。FIG. 2 shows a fuel metering device Z according to a second embodiment of the present invention.
が示されている。この第２実施例の燃料供給装置Ｚｌは
、前記第１実施例の燃料供給装置Ｚ８がエンジン／の負
荷変動をガス調量弁の弁開度あるいは弁用電子ガバナｊ
の出力、即ち、ガス燃料供給量によって検出していたの
に対して、エンジン／の負荷変動をエンジン／罠よって
駆動される発１１１機ｇの出力として検出するようにし
ている。It is shown. The fuel supply system Zl of the second embodiment is configured such that the fuel supply system Z8 of the first embodiment controls the load fluctuation of the engine by adjusting the valve opening of the gas metering valve or the electronic valve governor j.
In contrast to the previous detection based on the output of the engine, that is, the amount of gas fuel supplied, changes in the load of the engine are now detected as the output of the engine driven by the engine.
このように、エンジン負荷の変動ｋ Ｍ’（エンジン／
に連結される負荷（この場合、発電機と）の出力変動と
して検出するようにした場合にも、前記第１実施例の場
合とｉｔは同様の作用効果か１１）られる。尚、この第
２実施例の他の溝底部材は全て第７実施例の場合と同様
であるため、第１図と同様の符号を付してその詳細説明
を省略する。In this way, engine load fluctuation k M' (engine/
Even when it is detected as an output fluctuation of the load (in this case, the generator) connected to the generator, the same effect as in the first embodiment can be obtained. It should be noted that all the other groove bottom members of this second embodiment are the same as those of the seventh embodiment, so they are given the same reference numerals as in FIG. 1, and detailed explanation thereof will be omitted.
次に、本発明の詳細な説明すると、本発明のデュアルツ
ユエル機関の燃料供給装置は、デュアル運転時における
液体燃料の供給量の全混合燃料量に対する比率をエンジ
ン負荷に応じて適宜に調整し得るようにしているため、
デュアル運転時における液体燃料の供給量を一定比率に
円分するようにした従来のデュアルツユエル機関の燃料
供給装置の如く低負荷時において燃料消費率が悪化する
ということを可及的に抑制することができ、その結果、
デュアル運転時における全運転域を通しての燃料消費率
を向上きせることかできるという効果がある。Next, to explain the present invention in detail, the fuel supply system for a dual twin engine of the present invention appropriately adjusts the ratio of the amount of liquid fuel supplied to the total amount of mixed fuel during dual operation according to the engine load. Because I try to get
To suppress as much as possible the deterioration of the fuel consumption rate at low load as in the fuel supply system of the conventional dual twin engine, which divides the supply amount of liquid fuel into a constant ratio during dual operation. As a result,
This has the effect of improving the fuel consumption rate throughout the entire operating range during dual operation.
第１図は本発明第２実施例に係る燃料供給殆のシステム
図、第２図は本発明第２実施例に係る燃料供給装置のシ
ステム図、第３図はデュアル運転時における液体燃料比
率と燃料消費率の関係を示す線図である。
／ ψ １ エ ン ジ ンｌ ・・
・ 燃料噴射ポンプ
グ ・・・ ガス調量弁
Ｘ ・・・ 液体燃料供給系統
Ｙ ・・・ ガス燃料供給系統Fig. 1 is a system diagram of most of the fuel supply system according to the second embodiment of the present invention, Fig. 2 is a system diagram of the fuel supply device according to the second embodiment of the present invention, and Fig. 3 is a diagram showing the liquid fuel ratio during dual operation. FIG. 3 is a diagram showing the relationship between fuel consumption rates. / ψ 1 engine l...
・Fuel injection pump... Gas metering valve X... Liquid fuel supply system Y... Gas fuel supply system
Claims (1)
Ｘ）とガス調量弁（ｌ／−）を有するガス燃料供給系統
（Ｙ）とを備え、前記燃料噴射ポンプ（２）とガスｉ！
ｌＩＸ弁（り）を適宜に制御することによりエンジン（
１）を、液体燃料のみを使用するディーゼル運転とガス
燃料と少量の液体燃料を同時に使用するデュアル運転と
Ｋその運転状態を切換えることができるようにしたデュ
アルツユエル機関の燃料供給装置であって、デュアル運
転時において、前記エンジン（１）の負荷が設定負荷以
下に下がった場合に前記燃料噴射ポンプ（，２）の燃料
噴射量を増量して液体燃料とガス燃料の混合燃料中に占
める液体燃料の比率を定格負荷時における比率よりも適
宜に高比率側に設定し得るようにしたことを特徴とする
デュアルツユエル機関の燃料供給装置。A Liquid fuel supply system with fuel injection pump (2)
X) and a gas fuel supply system (Y) having a gas metering valve (l/-), the fuel injection pump (2) and the gas i!
The engine (
1) is a fuel supply system for a dual fuel engine that can switch between diesel operation using only liquid fuel and dual operation using gas fuel and a small amount of liquid fuel at the same time. During dual operation, when the load of the engine (1) falls below the set load, the fuel injection amount of the fuel injection pump (2) is increased to increase the amount of liquid that occupies the mixed fuel of liquid fuel and gas fuel. A fuel supply system for a dual fuel engine, characterized in that the fuel ratio can be appropriately set to a higher ratio than the ratio at rated load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149469A JPS5939947A (en) | 1982-08-27 | 1982-08-27 | Fuel feed device for dual-fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149469A JPS5939947A (en) | 1982-08-27 | 1982-08-27 | Fuel feed device for dual-fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5939947A true JPS5939947A (en) | 1984-03-05 |
Family
ID=15475812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57149469A Pending JPS5939947A (en) | 1982-08-27 | 1982-08-27 | Fuel feed device for dual-fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939947A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62500674A (en) * | 1984-10-10 | 1987-03-19 | ガスパワ− インタ−ナシヨナル リミテツド | fuel control device |
| EP0235569A2 (en) * | 1986-02-12 | 1987-09-09 | GebràDer Sulzer Aktiengesellschaft | Apparatus for selectively injecting diesel oil and igniting fuel into the combustion chamber of a reciprocating internal-combustion engine using as main fuel diesel oil or gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57203790A (en) * | 1981-03-07 | 1982-12-14 | Garentan Ag | Apparatus for electrolytically plating blot shaped coating to metalic tape or metallized tape |
-
1982
- 1982-08-27 JP JP57149469A patent/JPS5939947A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57203790A (en) * | 1981-03-07 | 1982-12-14 | Garentan Ag | Apparatus for electrolytically plating blot shaped coating to metalic tape or metallized tape |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62500674A (en) * | 1984-10-10 | 1987-03-19 | ガスパワ− インタ−ナシヨナル リミテツド | fuel control device |
| EP0235569A2 (en) * | 1986-02-12 | 1987-09-09 | GebràDer Sulzer Aktiengesellschaft | Apparatus for selectively injecting diesel oil and igniting fuel into the combustion chamber of a reciprocating internal-combustion engine using as main fuel diesel oil or gas |
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