JPH0355810Y2 - - Google Patents
Info
- Publication number
- JPH0355810Y2 JPH0355810Y2 JP16675085U JP16675085U JPH0355810Y2 JP H0355810 Y2 JPH0355810 Y2 JP H0355810Y2 JP 16675085 U JP16675085 U JP 16675085U JP 16675085 U JP16675085 U JP 16675085U JP H0355810 Y2 JPH0355810 Y2 JP H0355810Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injection
- oil
- gas
- plunger
- 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
- 239000000446 fuel Substances 0.000 claims description 124
- 238000002347 injection Methods 0.000 claims description 94
- 239000007924 injection Substances 0.000 claims description 94
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000003111 delayed effect Effects 0.000 claims description 2
- 238000009841 combustion method Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 79
- 239000003921 oil Substances 0.000 description 76
- 238000002485 combustion reaction Methods 0.000 description 15
- 239000007921 spray Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 239000000295 fuel oil Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は圧縮着火性の良い油燃料をパイロツト
燃料とし、ガス燃料又はアルコールなどの低セタ
ン価燃料を主燃料とする二元燃料デイーゼルエン
ジンに関する。[Detailed description of the invention] [Field of industrial application] The present invention relates to a dual-fuel diesel engine that uses oil fuel with good compression ignitability as the pilot fuel and uses gas fuel or a low cetane number fuel such as alcohol as the main fuel. .
第１１図に圧縮着火性の良い油燃料噴射弁（パ
イロツト燃料噴射弁）１とガス噴射弁２とをそれ
ぞれ独立にシリンダカバー１０に備えた従来の
油、ガス二元燃料デイーゼルエンジンを示す。３
は油燃料を噴射する燃料噴射ポンプ、４はガス噴
射弁を駆動するアクチユエータとしての油ポン
プ、５は油燃料タンク、６は高圧ガス燃料ボン
ベ、７はアクチユエータポンプ４用の油タンク、
８はパイロツト燃料油の噴射ポンプ３とガス噴射
弁アクチユエータポンプ４のコントロールラツク
を作動するコントローラ、９はピストン、１０は
シリンダカバー、１１はシリンダライナ、１２は
排気弁を示す。第１２図はアクチユエータポンプ
のプランジヤ拡大図であり、４０１はプランジ
ヤ、４０２はプランジヤリードの上端、４０３は
プランジヤリードの下端、４０４は給油孔を示し
ており、この場合アクチユエータポンプ４の圧縮
始めはポンプの作用期間即ちガスの噴射期間
（量）にかかわらず一定である。第１３図はパイ
ロツト燃料油の噴射ポンプのプランジヤ拡大図を
示しており、３０１はプランジヤ、３０２はプラ
ンジヤリードの上端、３０３はプランジヤリード
の下端、３０４は給油孔を示している。パイロツ
ト燃料油の噴射開始はパイロツト燃料油の噴射期
間（量）にかかわらず一定である。第１４図はガ
ス噴射弁とそのアクチユエータの関係を示し、２
はガス噴射弁本体、２０１はガス噴射弁の針弁、
２０２はガス通路、２０３はガス噴射弁の針弁噴
射弁の針弁を開閉するアクチユエータの油圧通
路、４はアクチユエータポンプ、４０１はポンプ
プランジヤを示している。
FIG. 11 shows a conventional oil/gas dual fuel diesel engine in which a cylinder cover 10 is equipped with an oil fuel injection valve (pilot fuel injection valve) 1 and a gas injection valve 2 each having good compression ignition properties. 3
4 is a fuel injection pump that injects oil fuel, 4 is an oil pump as an actuator that drives a gas injection valve, 5 is an oil fuel tank, 6 is a high-pressure gas fuel cylinder, 7 is an oil tank for the actuator pump 4,
8 is a controller for operating the control racks of the pilot fuel oil injection pump 3 and the gas injection valve actuator pump 4; 9 is a piston; 10 is a cylinder cover; 11 is a cylinder liner; 12 is an exhaust valve. FIG. 12 is an enlarged view of the plunger of the actuator pump, where 401 is the plunger, 402 is the upper end of the plunger lead, 403 is the lower end of the plunger lead, and 404 is the oil supply hole. The start of compression remains constant regardless of the pump operating period, ie, the gas injection period (amount). FIG. 13 shows an enlarged view of the plunger of the pilot fuel oil injection pump, where 301 is the plunger, 302 is the upper end of the plunger lead, 303 is the lower end of the plunger lead, and 304 is the oil supply hole. The start of injection of pilot fuel oil is constant regardless of the injection period (amount) of pilot fuel oil. Figure 14 shows the relationship between the gas injection valve and its actuator, and shows the relationship between the gas injection valve and its actuator.
is the gas injection valve body, 201 is the needle valve of the gas injection valve,
202 is a gas passage, 203 is a hydraulic passage of an actuator that opens and closes the needle valve of the gas injection valve, 4 is an actuator pump, and 401 is a pump plunger.
ガス燃料は通常セタン価が低く自己着火しな
い。従つて圧縮発火性のよい油燃料をパイロツト
燃料としてまず自己着火せしめ、これをトーチと
してパイロツト燃料とほぼ同時に噴射されたガス
燃料を着火燃焼させる。この時従来のパイロツト
燃料弁１の噴射開始時期は固定されており、又ガ
ス燃料噴射弁を駆動するアクチユエータポンプ２
の圧縮始めも固定されていてガスジエツトが噴射
された時期から極く短かい期間遅れてパイロツト
燃料が噴射され、しかもその噴射始めの差はガス
と油の混焼割合により変化しない。 Gaseous fuels usually have low cetane numbers and do not self-ignite. Therefore, an oil fuel with good compression ignitability is used as a pilot fuel and is first self-ignited, and this is used as a torch to ignite and burn the gas fuel injected almost simultaneously with the pilot fuel. At this time, the injection start timing of the conventional pilot fuel valve 1 is fixed, and the actuator pump 2 that drives the gas fuel injection valve
The start of compression is also fixed, and the pilot fuel is injected after a very short delay from when the gas jet is injected, and the difference in the start of injection does not change depending on the co-combustion ratio of gas and oil.
従来のガス油二元燃料デイーゼルエンジンで
は、油燃料とガス燃料の混燃割合において油燃料
が少ない場合には、第１５図に示すように実線の
ガス燃料噴射期間に対し破線は油燃料噴射期間を
示しており、第１７図は油燃料の噴射始めよりｔ
＝t1時間経過したパイロツト燃料着火時のパイロ
ツト燃料噴霧とガスジエツトの発達状態を示して
いる。１はパイロツト燃料噴射弁、２はガス噴射
弁、１３はパイロツト燃料噴霧、１４はガスジエ
ツトを示す。このように油燃料が少ない場合にガ
ス噴射はじめより油燃料噴射始めまでの遅れが少
なくても両燃料は室内で十分に良く発達して着火
燃焼させることができる。
In a conventional gas-oil dual fuel diesel engine, when the amount of oil fuel is low in the mixed combustion ratio of oil fuel and gas fuel, as shown in Fig. 15, the solid line indicates the gas fuel injection period, while the broken line indicates the oil fuel injection period. Figure 17 shows t from the beginning of oil fuel injection.
=t This figure shows the development of the pilot fuel spray and gas jet when the pilot fuel ignites after 1 hour. 1 is a pilot fuel injection valve, 2 is a gas injection valve, 13 is a pilot fuel spray, and 14 is a gas jet. In this way, when the amount of oil fuel is small, even if the delay between the start of gas injection and the start of oil fuel injection is small, both fuels can develop sufficiently well in the room and be ignited and burned.
しかるに混焼率が高くなり、油とガスが50％：
50％になつた場合には噴射期間のオーバーラツプ
する期間が長くなり、第１６図に示すように油燃
料とガス燃料の噴射期間のオーバーラツプする期
間が長くなり、ガス噴射弁２から噴射されたガス
ジエツト１４とパイロツト燃料噴射弁１から噴射
された油燃料噴霧１３との重なりが大きくなる。
従つて総合的な燃料とガスの燃焼室への分散状態
が悪くなり、不完全燃焼することになり性能が悪
化する。 However, the co-combustion rate is high, with oil and gas accounting for 50%:
When it reaches 50%, the overlapping period of the injection period becomes longer, and as shown in FIG. 14 and the oil fuel spray 13 injected from the pilot fuel injection valve 1 becomes larger.
Therefore, the overall state of dispersion of fuel and gas into the combustion chamber deteriorates, leading to incomplete combustion and deterioration of performance.
本考案の目的は前記従来装置の欠点を解消し、
種種の混焼率においても良好な燃焼効率が得られ
る燃料噴射時期調整手段を具えた油、ガス二元燃
料デイーゼルエンジンを提供するにある。 The purpose of the present invention is to eliminate the drawbacks of the conventional device,
To provide an oil/gas dual fuel diesel engine equipped with a fuel injection timing adjustment means capable of obtaining good combustion efficiency even at various co-combustion rates.
本考案のガス、油二元燃料噴射ポンプはガス弁
を駆動するアクチユエータポンプ１５のプランジ
ヤリードの上端と該リード下端とをそれぞれ傾斜
面として、噴射始めと噴射終りを同時にコントロ
ールして、プランジヤ有効ストロークが小さい時
には噴射始めが早くなり、有効ストロークが大き
くなるにつれて噴射始めが遅れるようにするとと
もに、油燃料噴射ポンプのプランジヤリードは噴
射始め一定とする。従つて油燃料が多くなるに従
い、ガス燃料噴射開始始めと油燃料噴射始めとの
差を大きくして、ガス、油燃料の燃焼室内での分
散状態が悪化するのを防止し、燃焼状態を良好に
保持するようにしたものである。
In the gas/oil dual fuel injection pump of the present invention, the upper end and lower end of the plunger lead of the actuator pump 15 that drives the gas valve are respectively sloped surfaces, and the start and end of injection are simultaneously controlled. When the effective stroke is small, the start of injection is earlier, and as the effective stroke becomes larger, the start of injection is delayed, and the plunger lead of the oil fuel injection pump is kept constant from the start of injection. Therefore, as the amount of oil fuel increases, the difference between the start of gas fuel injection and the start of oil fuel injection is increased to prevent the deterioration of the dispersion state of gas and oil fuel in the combustion chamber and improve the combustion state. It was designed to be kept at .
第３図で油プランジヤを矢印Ｂ方向に回転し油
燃料が多く噴射されるようになるに従い、ガス弁
アクチユエータポンプのプランジヤリードは第２
図の矢印Ａ方向に回転するようにコントロールさ
れ、ガス燃料の噴射始めは進み、一方油燃料ポン
プの噴射始めは噴射量如何に拘らず一定であるか
ら両者噴射始めの差が大きくなり、ガス燃料の混
合する時間を確保することができる。
In Figure 3, as the oil plunger is rotated in the direction of arrow B and more oil fuel is injected, the plunger lead of the gas valve actuator pump changes to the second position.
The gas fuel pump is controlled to rotate in the direction of arrow A in the figure, and the injection start of the gas fuel advances, while the injection start of the oil fuel pump is constant regardless of the injection amount, so the difference between the two injection starts becomes large, and the gas fuel This allows time for mixing.
以下第１〜１０図を参照して本考案の一実施例
について説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.
第１図は本考案の二元燃料デイーゼルエンジン
の油燃料とガス燃料の供給系及びその制御系を示
したもので、１は圧縮着火性の良い油燃料噴射
弁、２はガス燃料噴射弁、３は油燃料を噴射する
燃料噴射ポンプ、５は油燃料のタンク、６は高圧
燃料ガスボンベ、７はガス噴射弁アクチユエータ
用油タンク、８は油燃料噴射ポンプ及びガス噴射
弁アクチユエータ用ポンプの関連させてコントロ
ールするコントローラ、９はピストン、１０はシ
リンダカバー、１１はシリンダライナ、１２は排
気弁、１５はガス弁の駆動を行なうアクチユエー
タ油圧ポンプを示す。 Fig. 1 shows the oil fuel and gas fuel supply system and its control system of the dual fuel diesel engine of the present invention, in which 1 is an oil fuel injection valve with good compression ignition properties, 2 is a gas fuel injection valve, 3 is a fuel injection pump that injects oil fuel, 5 is an oil fuel tank, 6 is a high-pressure fuel gas cylinder, 7 is an oil tank for a gas injection valve actuator, and 8 is an association between an oil fuel injection pump and a gas injection valve actuator pump. 9 is a piston, 10 is a cylinder cover, 11 is a cylinder liner, 12 is an exhaust valve, and 15 is an actuator hydraulic pump that drives a gas valve.
第２図はガス弁の駆動を行なうアクチユエータ
油圧ポンプのプランジヤ拡大図で１５０１はプラ
ンジヤ、１５０２はプランジヤリード上端、１５
０３はプランジヤリード下端、１５０４は給油孔
を示している。プランジヤリード下端１５０２は
斜めになつておりプランジヤが矢印Ａ方向に回転
してポンプの作用期間即ち噴射期間（量）が減少
するにつれてポンプの圧縮始めが進むようにプラ
ンジヤリード下端１５０３は上端と同じ方向の傾
斜をもつて構成されている。 Fig. 2 is an enlarged view of the plunger of the actuator hydraulic pump that drives the gas valve, 1501 is the plunger, 1502 is the upper end of the plunger lead, 15
03 indicates the lower end of the plunger lead, and 1504 indicates the oil supply hole. The lower end 1502 of the plunger lead is slanted, and the lower end 1503 of the plunger lead is in the same direction as the upper end so that as the plunger rotates in the direction of arrow A and the pump action period, that is, the injection period (amount) decreases, the pump starts to compress. It is constructed with a slope of .
第３図はパイロツト燃料油の噴射ポンプ用プラ
ンジヤ拡大図を示し、３０１はプランジヤ、３０
２はプランジヤリードの上端、３０３はプランジ
ヤリードの下端、３０４は給油孔を示している。
この場合プランジヤリード上端３０２は第３図に
示すようにポンププランジヤ中心軸に対して直角
に設定されているため、パイロツト燃料油の圧縮
開始期間は噴射量に拘らず一定である。 Figure 3 shows an enlarged view of the plunger for the injection pump for pilot fuel oil, 301 is the plunger, 30
2 represents the upper end of the plunger lead, 303 represents the lower end of the plunger lead, and 304 represents the oil supply hole.
In this case, since the plunger lead upper end 302 is set perpendicular to the center axis of the pump plunger as shown in FIG. 3, the compression start period of the pilot fuel oil is constant regardless of the injection amount.
第４図は油燃料とガス燃料とを加えた全燃料に
対する油燃料量の割合と、油燃料噴射始めに対す
る油燃料噴射始めの進角関係を示している。先述
のとおり油燃料噴射量が多くなりガス燃料噴射量
が少なくなると、ガス弁の噴射開始時期が進み、
例えば油燃料が全燃料（油燃料＋ガス燃料）の50
％を越えても混焼率の悪化を防止するような噴射
時期となつている。 FIG. 4 shows the ratio of the amount of oil fuel to the total fuel including oil fuel and gas fuel, and the advance angle relationship between the oil fuel injection start and the oil fuel injection start. As mentioned earlier, when the oil fuel injection amount increases and the gas fuel injection amount decreases, the injection start timing of the gas valve advances,
For example, oil fuel is 50% of total fuel (oil fuel + gas fuel)
The injection timing is set to prevent deterioration of the co-combustion rate even if it exceeds %.
第５〜７図はガス弁噴射期間と油燃料噴射期間
との関係を燃焼室内の噴霧状況と関連づけて示し
たものである。 5 to 7 show the relationship between the gas valve injection period and the oil fuel injection period in relation to the spray condition in the combustion chamber.
第５図はガス燃料を主体とし少量の油燃料を着
火用として噴射した状態で、油噴射始めに対する
油噴射始めの進角時間t0が小さい場合を示してい
る。第６図は油燃料量がやや増加した状態を示し
ており、ガス燃料量の割合が減少するのでガス弁
アクチユエータポンプ１５のプランジヤ１５０１
の有効ストロークが減少して、プランジヤリード
上端の作用でガス弁２の噴射始めがやや進んだ状
態を示している。第７図はさらに油燃料の噴射量
が増大し、ガス燃料噴射量が減少して、油燃料と
ガス燃料の割合が50％，50％となつた場合を示し
ており、ガス弁の噴射始めは、ガス弁アクチユエ
ータポンプ１５のプランジヤリード上端１５０２
の形状によりさらに進んだ状態となつている。し
かしガス弁の噴射終りは油燃料弁の噴射始めより
後になるように油燃料ポンプ３のプランジヤ３の
プランジヤリード上端３０２が設定されている。 FIG. 5 shows a case in which gas fuel is mainly injected and a small amount of oil fuel is injected for ignition, and the advance time t 0 of the oil injection start with respect to the oil injection start is small. FIG. 6 shows a state in which the amount of oil fuel has increased slightly, and since the ratio of the amount of gas fuel has decreased, the plunger 1501 of the gas valve actuator pump 15
The figure shows a state in which the effective stroke of the gas valve 2 has decreased and the injection start of the gas valve 2 has advanced slightly due to the action of the upper end of the plunger lead. Figure 7 shows the case where the oil fuel injection amount further increases and the gas fuel injection amount decreases, and the ratio of oil fuel and gas fuel becomes 50% and 50%. is the plunger lead upper end 1502 of the gas valve actuator pump 15
It is in a more advanced state due to its shape. However, the plunger lead upper end 302 of the plunger 3 of the oil-fuel pump 3 is set so that the end of injection from the gas valve is later than the beginning of injection from the oil-fuel valve.
第８〜１０図はそれぞれ第５〜７図に対する油
燃料の着火時（ｔ＝t1）に対応する燃焼室内の油
及びガス燃料噴霧の状況を示しており１は油燃料
弁、２はガス噴射弁、１３は油燃料噴霧、１４は
ガスジエツトを示している。 Figures 8 to 10 respectively show the conditions of oil and gas fuel spray inside the combustion chamber corresponding to the time of ignition of oil fuel (t=t 1 ) with respect to Figures 5 to 7. 1 is the oil fuel valve, 2 is the gas An injection valve, 13 indicates an oil fuel spray, and 14 indicates a gas jet.
第８図は第５図に対応するもので十分に発達し
たガスジエツト１４に対し少量の油燃料噴霧１３
が着火源として作用し、燃料分散状況も良好であ
る。第９図は第６図に対応するものであり、ガス
ジエツトと油燃料噴霧が重なることなく分散も良
好な状態となつている。第１０図は第７図に対応
しておりガスジエツトがある程度発達した後に油
燃料が噴射されるので油燃料噴霧とガスジエツト
が重なることなく十分に分散し、油、ガス両燃料
と空気との混合が良好に保持できる。 FIG. 8 corresponds to FIG. 5, and shows a fully developed gas jet 14 and a small amount of oil fuel spray 13.
acts as an ignition source, and the fuel is well dispersed. FIG. 9 corresponds to FIG. 6, and shows that the gas jet and oil fuel spray do not overlap and are well dispersed. Figure 10 corresponds to Figure 7, and since the oil fuel is injected after the gas jet has developed to a certain extent, the oil fuel spray and the gas jet are sufficiently dispersed without overlapping, and the mixture of both oil and gas fuels and air is achieved. Can be held well.
なお本実施例では単一燃料弁からそれぞれ単一
油燃料噴霧、単一ガスジエツトが形成される場合
について説明したが、単一燃料弁にそれぞれ複数
の噴射孔を持ち、複数の油燃料噴霧を形成し、又
単一ガス噴射弁に複数の噴射孔を持ち複数のガス
ジエツトを形成する場合も全く同様の作用効果を
もつ。 In this example, a case was explained in which a single oil fuel spray and a single gas jet are formed from a single fuel valve, but a single fuel valve each having a plurality of injection holes and forming a plurality of oil fuel sprays However, even when a single gas injection valve has a plurality of injection holes to form a plurality of gas jets, exactly the same effect can be obtained.
前述のとおり、本考案の油、ガス二元燃料デイ
ーゼルエンジンはガス弁アクチユエータ油圧ポン
プのプランジヤリード上端及び下端をそれぞれ同
一方向に傾斜させてプランジヤの有効ストローク
が短くなりガスの吐出量が少なくなるに従い噴射
始めが早くなるようにするとともに、油燃料噴射
ポンプの噴射始めは一定になるように構成したの
で、油とガスの混焼割合が変化しても燃焼室内の
油燃料噴霧とガスジエツトが大きく重なり合うこ
となく、いつも良好な状態に保たれ、燃料効率を
高く維持できる。
As mentioned above, in the oil/gas dual fuel diesel engine of the present invention, the upper and lower ends of the plunger leads of the gas valve actuator and hydraulic pump are tilted in the same direction, so that the effective stroke of the plunger becomes shorter and the amount of gas discharged decreases. In addition to making the injection start early, the oil-fuel injection pump was configured to have a constant injection start, so even if the oil and gas co-combustion ratio changes, the oil-fuel spray and gas jet in the combustion chamber will not overlap significantly. It is always kept in good condition and maintains high fuel efficiency.
第１〜１０図は本考案の実施例で第１図は二元
燃料デイーゼルエンジンの油及びガス燃料の供給
系及び制御系を示す図面、第２図はガス燃料弁用
アクチユエータ油ポンプのプランジヤ拡大図、第
３図は油燃料噴射ポンプのプランジヤ拡大図、第
４図は全燃料に対する油燃料の％と油燃料噴射始
めからガス燃料噴射始めまでの進角時間t0との関
係線図、第５〜７図は油及びガス燃料の噴射始め
及び噴射期間を示す線図で第５図は油燃料が少な
い場合、第６図は油燃料が全燃料（油燃料＋ガス
燃料）に対し約30％の場合、第７図は油燃料とガ
ス燃料とがそれぞれ50％の場合である。第８〜１
０図はそれぞれ第５〜７図に対応するもので油燃
料発火時の燃焼室内の油及びガス燃料の噴霧状況
図、第１１〜１８図は従来例で、第１１図は第１
図相当図、第１２図は第２図相当図、第１３図は
第３図相当図、第１４図はガス噴射弁とそのアク
チユエータとの関係図、第１５図は第５図相当
図、第１６図は第７図相当図、第１７図は第８図
相当図、第１８図は第１０図相当図である。
１……油燃料噴射弁、２……ガス燃料噴射弁、
３……油燃料噴射ポンプ、３０２……油燃料噴射
ポンプのプランジヤリード上端、１０……シリン
ダカバー、１５……ガス燃料噴射弁を駆動するア
クチユエータポンプ、１５０１……アクチユエー
タポンプ１５のプランジヤ、１５０２……アクチ
ユエータポンププランジヤ１５０１のリード上
端、１５０３……アクチユエータポンププランジ
ヤ１５０１のリード下端。
Figures 1 to 10 are examples of the present invention. Figure 1 is a drawing showing the oil and gas fuel supply system and control system of a dual fuel diesel engine. Figure 2 is an enlarged view of the plunger of the actuator oil pump for the gas fuel valve. Figure 3 is an enlarged view of the plunger of an oil fuel injection pump, Figure 4 is a relationship diagram between the percentage of oil fuel to the total fuel and the advance time t 0 from the start of oil fuel injection to the start of gas fuel injection. Figures 5 to 7 are diagrams showing the injection start and injection period of oil and gas fuel. %, Figure 7 shows the case where oil fuel and gas fuel are each 50%. 8th to 1st
Figure 0 corresponds to Figures 5 to 7, respectively, and shows the spray situation of oil and gas fuel in the combustion chamber when oil fuel ignites, Figures 11 to 18 are conventional examples, and Figure
Figure 12 is a diagram equivalent to Figure 2, Figure 13 is a diagram equivalent to Figure 3, Figure 14 is a relationship diagram between a gas injection valve and its actuator, Figure 15 is a diagram equivalent to Figure 5, and Figure 15 is a diagram equivalent to Figure 5. 16 is a diagram equivalent to FIG. 7, FIG. 17 is a diagram equivalent to FIG. 8, and FIG. 18 is a diagram equivalent to FIG. 10. 1...Oil fuel injection valve, 2...Gas fuel injection valve,
3... Oil fuel injection pump, 302... Upper end of plunger lead of oil fuel injection pump, 10... Cylinder cover, 15... Actuator pump that drives the gas fuel injection valve, 1501... Actuator pump 15 Plunger, 1502...The upper end of the lead of the actuator pump plunger 1501, 1503...The lower end of the lead of the actuator pump plunger 1501.
Claims (1)
ドインジエクシヨン燃焼方式を採用し複数組の圧
縮着火性の良い油燃料を噴出する油燃料噴射弁と
ガス燃料噴射弁とを具備した二元燃料デイーゼル
エンジンにおいて、ガス噴射弁を駆動するアクチ
ユエータポンプのプランジヤリードの上端及び下
端を夫々噴射始め時期及び噴射終り時期が変化す
るような形状とし、かつ該リードはプランジヤの
有効圧縮ストロークの小さなときのほうが噴射始
めが早く、有効圧縮ストロークが大きくなるにつ
れて噴射始めが遅れるように形成するとともに、
油燃料噴射ポンプのプランジヤリード上端は噴射
始め一定の形状としたことを特徴とする油ガス二
元燃料デイーゼルエンジン。 In a dual-fuel diesel engine that adopts a side-injection combustion method that injects fuel from around the cylinder cover and is equipped with multiple sets of oil fuel injection valves and gas fuel injection valves that eject oil fuel with good compression ignition properties. , the upper and lower ends of the plunger lead of the actuator pump that drives the gas injection valve are shaped so that the injection start timing and injection end timing change, respectively, and the lead is shaped such that the injection starts when the effective compression stroke of the plunger is small. In addition to forming the injection so that the start is early and the start of injection is delayed as the effective compression stroke becomes larger,
An oil/gas dual fuel diesel engine characterized in that the upper end of the plunger lead of the oil/fuel injection pump has a constant shape at the beginning of injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16675085U JPH0355810Y2 (en) | 1985-10-31 | 1985-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16675085U JPH0355810Y2 (en) | 1985-10-31 | 1985-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6276279U JPS6276279U (en) | 1987-05-15 |
| JPH0355810Y2 true JPH0355810Y2 (en) | 1991-12-12 |
Family
ID=31098024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16675085U Expired JPH0355810Y2 (en) | 1985-10-31 | 1985-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0355810Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0640519B2 (en) * | 1986-01-20 | 1994-05-25 | 昭和シェル石油株式会社 | Method for producing resin interlayer laminating electroluminescence |
| JP4609563B2 (en) * | 2008-09-17 | 2011-01-12 | トヨタ自動車株式会社 | Protection control method for gaseous fuel injection valve of bi-fuel direct injection engine |
-
1985
- 1985-10-31 JP JP16675085U patent/JPH0355810Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6276279U (en) | 1987-05-15 |
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