JPS6019952A - Gas mixer for engine - Google Patents
Gas mixer for engineInfo
- Publication number
- JPS6019952A JPS6019952A JP58127188A JP12718883A JPS6019952A JP S6019952 A JPS6019952 A JP S6019952A JP 58127188 A JP58127188 A JP 58127188A JP 12718883 A JP12718883 A JP 12718883A JP S6019952 A JPS6019952 A JP S6019952A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- mixer
- engine
- air
- combustible gas
- 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 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 57
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001105 regulatory effect 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
- F02M21/042—Mixer comprising a plurality of bores or flow passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
- F02M21/047—Venturi mixer
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は可燃ガスを燃料とづ−る予混合ガスエンジンの
ガス混合器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas mixer for a premixed gas engine that uses combustible gas as fuel.
［従来例の構成とその問題点］
予混合ガスエンジン用のガス混合器としては、一般に第
１図に示すようなベンチュリを利用したものが大勢を占
める。この型式の混合器にあっては、エンジンのピスト
ン１１が下降し吸気弁１２が聞くことにより、ガス混合
器１３内に空気が強制的に吸入される。吸入された空気
はガス混合器内のベンチュリ部１４で絞られることによ
り流速を増し、負圧を生じる。一方、可燃ガスはガバナ
１５によりその圧力を混合気入口１６の圧力まで減圧さ
れ、さらにベンチコリ部１４に生じた上記負圧により可
燃ガス流出口１７から混合器内に吸入される。可燃ガス
と空気の空燃比はベンチコリ部１４と可燃ガス流出口１
７の断面積比によりほぼ決定され、適正な空燃比の混合
気となって吸気絞り弁１８で絞られた後、シリンダ１９
内に供給される。この時、エンジンの出力はシリンダ１
９内に供給される混合気の絶対量によって制御され、そ
の絶対間の制御は吸気絞り弁１８の開度によって調整さ
れる為、この方式のエンジン制御において吸気絞り弁に
よる調整は不可欠なものとなる。[Conventional Structure and Problems Therein] Most gas mixers for premixed gas engines generally utilize a venturi as shown in FIG. In this type of mixer, air is forced into the gas mixer 13 by the lowering of the engine piston 11 and the intake valve 12. The sucked air is throttled by the venturi section 14 in the gas mixer, thereby increasing the flow velocity and creating negative pressure. On the other hand, the pressure of the combustible gas is reduced by the governor 15 to the pressure at the air-fuel mixture inlet 16, and the negative pressure generated in the bench stiffness section 14 causes the combustible gas to be sucked into the mixer from the combustible gas outlet 17. The air-fuel ratio of combustible gas and air is determined by the bench stiffness section 14 and the combustible gas outlet 1.
After the air-fuel mixture has an appropriate air-fuel ratio and is throttled by the intake throttle valve 18, the mixture is almost determined by the cross-sectional area ratio of 7.
supplied within. At this time, the engine output is cylinder 1
9, and the absolute control is adjusted by the opening degree of the intake throttle valve 18, so adjustment by the intake throttle valve is essential in this type of engine control. Become.
その結果、吸気を絞った場合にシリンダ内へ吸入される
混合気量のシリンダ容積に対する割合（体積効率）は減
少し、実質的な圧縮比を下げると共に、吸気仕事による
損失が増加し、出力及び効率の低下を招く。また、以上
の事項は吸気絞り弁を全開にした場合にのみ最小限にと
どめることが可能であるが、この型式において吸気絞り
弁を全開に固定したままではエンジンの制御（よ不可０
ヒとなり、必然的に吸気絞り弁による調整がり＼要とな
る。さらに、混合器内のベンチコリ部による絞りも、体
積効率の減少、吸気仕事の増加の原因となり、出力及び
効率の低下を招く。As a result, when the intake air is throttled, the ratio of the amount of air-fuel mixture sucked into the cylinder to the cylinder volume (volume efficiency) decreases, lowering the effective compression ratio, increasing loss due to intake work, and increasing the output and This results in a decrease in efficiency. Additionally, the above-mentioned problems can be minimized only when the intake throttle valve is fully open; however, with this model, if the intake throttle valve is fixed at the fully open position, engine control (or impossibility) will occur.
This will inevitably require adjustment using the intake throttle valve. Furthermore, the throttling caused by the bench stiffness within the mixer also causes a decrease in volumetric efficiency and an increase in intake work, resulting in a decrease in output and efficiency.
これに対しエンジン用ガス混合器内に加圧された可燃ガ
スを噴出し、その噴出量をガス流量調整弁によってｉ１
８＋１ ｆｉｆｌすることにより、エンジン出力を制御
し、さらに吸気絞り弁をこの混合器に併用することによ
り、低負荷時における空気・可燃ガス混合気の空燃比を
調整して、失火を防ぐエンジン用ガス混合器がある。こ
の型式の混合器を第２図に基づいて説明する。なお第１
図と共通する部分には、同一番号を付す。この混合器に
あって（よ、エンジンのピストン１１が下降し吸気弁１
２がＲ＜ことによりガス混合器２０内に空気が吸入され
る。一方、都市ガスは都市ガス圧力によりガスコック２
２から＠２１を介して送り出され、ガス流量調整弁２３
によりその流量を調整された後、混合器２０内の可燃ガ
ス噴出口２４から混合器２０内に噴出され、空気との混
合気を形成した後、シリンダ１０内に供給される。従っ
てこの混合器では、都市カス圧力を減圧する為のガバナ
等の減圧機器の設置か不要となる。エンジン出力の制御
は基本的にガス流量調整弁２３によるガス流量制御によ
って行な゛りれる。また、空気・可燃ガス混合気の空燃
比のｗＩ整【ま吸気絞り弁２５の開閉によって行なわれ
る。In response, pressurized combustible gas is ejected into the engine gas mixer, and the amount of ejection is adjusted to i1 by the gas flow rate adjustment valve.
8+1 fifl controls the engine output, and by using an intake throttle valve in conjunction with this mixer, the air-fuel ratio of the air/combustible gas mixture at low loads is adjusted to prevent misfires. There is a mixer. This type of mixer will be explained based on FIG. Note that the first
Parts common to the figures are given the same numbers. In this mixer, the piston 11 of the engine descends and the intake valve 1
Since 2 is R<, air is drawn into the gas mixer 20. On the other hand, city gas is supplied to gas cock 2 due to city gas pressure.
2 through @21, and the gas flow rate adjustment valve 23
After its flow rate is adjusted, the combustible gas is ejected into the mixer 20 from the combustible gas ejection port 24 in the mixer 20, and after forming a mixture with air, it is supplied into the cylinder 10. Therefore, this mixer does not require the installation of a pressure reducing device such as a governor to reduce the urban scum pressure. The engine output is basically controlled by controlling the gas flow rate using the gas flow rate regulating valve 23. In addition, the air-fuel ratio of the air/combustible gas mixture is adjusted by opening and closing the intake throttle valve 25.
上記従来例において、吸気絞り弁２５を全開に固定した
場合、混合器２０内の圧力損失は最小となり、シリンダ
１９内に吸入される混合気量はシリンダ容積とほぼ等し
くなる。ゆえに、常に高体積効率及び高圧縮比が得られ
、吸気絞り弁２５による実質的な圧縮比減少による効率
の低下、動力の損失を避けることが出来る。また、エン
ジン制御は可燃ガスの噴出量を調整して行なう為、吸気
絞り弁２５を全開で固定していても、制御は十分可能で
あり、高２１］率を維持出来る。この時、１回の吸入過
程【こおいて吸入されるガス量はエンジン出力軸【こｈ
〜ｈ＼るトルクの大きさによってほぼ決定されることｈ
＼ら、エンジン出力軸のトルクの大きさくこ対応し１．
：空燃比の混合気がシリンダ内に供給さ４″′Ｌる。イ
の結果、最大トルク時におけるの空燃１しが（工（工Ｉ
里論空燃比となり、トルクがそれ以下の場合（より−べ
て空気過剰な空燃比で燃焼する。従って吸気摩交り弁２
５を全開に固定した場合、混合気の空気過東１１率りく
都市ガスの可燃限界を越えない限り、可燃力゛ス流量の
みによるエンジン出力制御だけで十分運転可能である。In the conventional example described above, when the intake throttle valve 25 is fixed fully open, the pressure loss within the mixer 20 is minimized, and the amount of air-fuel mixture sucked into the cylinder 19 becomes approximately equal to the cylinder volume. Therefore, a high volumetric efficiency and a high compression ratio can always be obtained, and a decrease in efficiency and loss of power due to a substantial reduction in the compression ratio due to the intake throttle valve 25 can be avoided. Furthermore, since engine control is performed by adjusting the amount of combustible gas ejected, even if the intake throttle valve 25 is fixed at a fully open position, sufficient control is possible and a high 21] rate can be maintained. At this time, the amount of gas inhaled during one intake process is determined by the engine output shaft.
～h＼It is almost determined by the magnitude of the torque.h
The size of the torque on the engine output shaft corresponds to 1.
: Air-fuel mixture with an air-fuel ratio of 4''L is supplied into the cylinder.
If the air-fuel ratio is equal to 100%, and the torque is less than that (combustion occurs at an air-fuel ratio with excess air. Therefore, the intake friction valve 2
5 is fixed at full open, engine output control based only on the flow rate of combustible power is sufficient for operation as long as the air-fuel mixture does not exceed the flammability limit of city gas.
以」−説明したようにこのガス混合器は、前述の第１図
図示のものに比較すると、実質的な圧縮［ヒを下げるこ
となく、エンジンの制御を行なうことが出来、高効率を
維持出来、さらに混合２ａ中の圧力損失によって失なわ
れるエンジン動力を最）］＼限にどどめ高い効率が得ら
れるという特徴がある。- As explained above, this gas mixer, compared to the one shown in Figure 1 above, can control the engine without substantially lowering the compression and maintain high efficiency. Furthermore, the engine power lost due to pressure loss during the mixing 2a is minimized and high efficiency can be obtained.
しかし反面、第１図図示の混合器の揚台は、可燃ガスと
空気とが同圧で混合器内に入る為、この両者の混合性が
良く、エンジン内に入って爆発燃焼の際に完全燃焼し、
はぼ空燃比が理論空気量値［ｍ （供給空気量／理論空
気ｆＭ）＝１．Ｏｌで最もエンジン効率が高い状態にな
るが、第２図図示の混合器の場合は、可燃と空気との圧
力が相違する為、混合器内及びエンジン内部における可
燃ガスと空気との混合性があまり良くないという欠点が
ある。On the other hand, on the other hand, the platform of the mixer shown in Figure 1 allows the combustible gas and air to enter the mixer at the same pressure, so the mixing of the two is good, and when they enter the engine and explode and burn, they are completely burns,
The air-fuel ratio is the theoretical air amount value [m (supply air amount/theoretical air fM) = 1. However, in the case of the mixer shown in Figure 2, the pressure between the combustible gas and the air is different, so the mixability of the combustible gas and air inside the mixer and the engine is poor. The downside is that it's not very good.
３発明の目的コ
本発明は、通常のエンジン運転時における吸気絞り弁操
作の必要性をなくすことにより、エンジンの出力及び効
率の上昇を図り、目つ燃わｌど空気との混合トを向上さ
せ、排ガスのクリーン化を図ることを目的とする。3. Purpose of the Invention The present invention aims to increase the output and efficiency of the engine by eliminating the need to operate the intake throttle valve during normal engine operation, and improves the mixture with the combustion air. The purpose is to make exhaust gas cleaner.
：発明の構成］
本発明は、可燃ガスを燃料とする予混合ガスエンジンの
空気・可燃ガス混合器内に加圧された可燃ガスの圧力を
利用して可燃ガスを適量噴出させ、その噴出量を調整し
てエンジン出力を制御するガス混合器付きエンジンにお
いて、可燃ガスを混合器内の空気流過方向に沿って延設
した多数の孔を有する管状噴出口から噴出させることを
特徴としている。:Structure of the Invention] The present invention utilizes the pressure of pressurized combustible gas in the air/combustible gas mixer of a premixed gas engine that uses combustible gas as fuel to eject an appropriate amount of combustible gas, and to eject the ejected amount. An engine equipped with a gas mixer that controls engine output by adjusting the engine output is characterized in that combustible gas is ejected from a tubular ejection port having a large number of holes extending along the air flow direction within the mixer.
３実施例の説明及び効果］
第３図は本発明ガス混合器の一実施例を示す概略図であ
り、図中第１図、第２図と共通する部分には同一番号を
付しである。Description and Effects of Embodiment 3] FIG. 3 is a schematic diagram showing an embodiment of the gas mixer of the present invention, and parts in common with FIGS. 1 and 2 are given the same numbers. .
本実施例の混合器３０にあっては、該器内に、その内壁
とほぼ平行に延びる管状の可燃ガス噴出口３１が配設さ
れている。可燃ガス噴出口３１にはその長手方向全体に
亘って約１０乃至５０μｍの孔３２が多数不規則に設け
られており、これらの孔３２から混合器３０内に可燃ガ
スが噴出される。その為、この混合器によれば、第２図
図示の混合器２０のように可燃ガスを一方向に噴出させ
る型式に比べ、空気と可燃ガスとの混合性を向上させる
ことが可能となる。In the mixer 30 of this embodiment, a tubular combustible gas jet port 31 extending substantially parallel to the inner wall of the mixer is disposed within the mixer. A large number of holes 32 of about 10 to 50 μm are irregularly provided throughout the length of the combustible gas outlet 31, and combustible gas is ejected into the mixer 30 from these holes 32. Therefore, according to this mixer, it is possible to improve the mixing properties of air and combustible gas, compared to a type of mixer 20 shown in FIG. 2 in which combustible gas is ejected in one direction.
第２図及び第３図図示のガス混合器を用いたエンジンの
夫々の効率及び排ガスを測定した結果を第１表に示す。Table 1 shows the results of measuring the efficiency and exhaust gas of engines using the gas mixers shown in FIGS. 2 and 3.
この効率は動力効率で１００％負荷、回転数２０００回
転の条件によるものである。なおこのエンジンは日産自
動車株式会社製の１３００ｃｃ、 ４サイクルエンジン
（Δ−１２型〉を改造したもので、燃料は、天然ガスが
主成分の都市ガス１３△を使用した。This efficiency is based on the conditions of power efficiency of 100% load and 2000 rotations. This engine was a modified 1300cc, 4-cycle engine (Δ-12 type) manufactured by Nissan Motor Co., Ltd., and the fuel used was city gas 13Δ, the main component of which was natural gas.
第１表は、本発明のガス混合器を用いたエンジンが、全
体的に効率も高く且つ排ガス中の有害成分特に炭化水素
（ＨＣ）、−酸化炭素（Ｃｏ）が少なく、エンジン内で
の爆発燃焼時に空気と燃焼ガスとの混合状態が良く、完
成燃焼に近い状態であることを示している。Table 1 shows that the engine using the gas mixer of the present invention has high overall efficiency and contains less harmful components in the exhaust gas, especially hydrocarbons (HC) and -carbon oxides (Co), and is less likely to explode within the engine. This shows that the air and combustion gas are mixed well during combustion, and the combustion is close to complete combustion.
第１図及び第２図は従来のガス混合器を示づ一概略図、
第３図は本発明ガス混合器の一実施例を示す概略図であ
る。
１１・・・ピストン １２・・・吸気弁 １３．２０．
３０・・・ガス混合器 １５・・・減圧用ガバナ １８
．２５・・・吸気絞り弁２３・・・ガス流量調整弁 ２
４．３１・・・可燃ガス噴出口３２・・・孔
特許出願人 松下電器産業株式会社1 and 2 are schematic diagrams showing a conventional gas mixer,
FIG. 3 is a schematic diagram showing an embodiment of the gas mixer of the present invention. 11...Piston 12...Intake valve 13.20.
30... Gas mixer 15... Governor for pressure reduction 18
．． 25...Intake throttle valve 23...Gas flow rate adjustment valve 2
4.31... Combustible gas outlet 32... Hole Patent applicant Matsushita Electric Industrial Co., Ltd.
Claims (1)
ガス混合器内に加圧された可燃ガスの圧力を利用して可
燃ガスを適量噴出させ、その噴出量を調整してエンジン
出力を制御するガス混合器付きエンジンにおいて、 可燃ガスを混合器内の空気流過方向に沿って延設した多
数の孔を有する管状噴出口から噴出させることを特徴と
するエンジン用ガス混合器。[Scope of Claims] A suitable amount of combustible gas is ejected using the pressure of pressurized combustible gas in an air/combustible gas mixer of a premixed gas engine that uses combustible gas as fuel, and the amount of ejection is adjusted. In an engine equipped with a gas mixer that controls engine output using a gas mixer, the gas mixture for an engine is characterized in that combustible gas is ejected from a tubular nozzle having a large number of holes extending along the air flow direction in the mixer. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58127188A JPS6019952A (en) | 1983-07-13 | 1983-07-13 | Gas mixer for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58127188A JPS6019952A (en) | 1983-07-13 | 1983-07-13 | Gas mixer for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6019952A true JPS6019952A (en) | 1985-02-01 |
Family
ID=14953858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58127188A Pending JPS6019952A (en) | 1983-07-13 | 1983-07-13 | Gas mixer for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6019952A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008084884A1 (en) | 2007-01-12 | 2008-07-17 | Toyota Boshoku Kabushiki Kaisha | Lubricants for use in processing of metallic material and methods for processing the metallic material using the lubricants |
-
1983
- 1983-07-13 JP JP58127188A patent/JPS6019952A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008084884A1 (en) | 2007-01-12 | 2008-07-17 | Toyota Boshoku Kabushiki Kaisha | Lubricants for use in processing of metallic material and methods for processing the metallic material using the lubricants |
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