JPS5857024A - Combustion method of fuel in diesel engine - Google Patents
Combustion method of fuel in diesel engineInfo
- Publication number
- JPS5857024A JPS5857024A JP15395181A JP15395181A JPS5857024A JP S5857024 A JPS5857024 A JP S5857024A JP 15395181 A JP15395181 A JP 15395181A JP 15395181 A JP15395181 A JP 15395181A JP S5857024 A JPS5857024 A JP S5857024A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- combustion
- pipe
- dimethyl ether
- supplied
- 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
Classifications
-
- 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
- F02B49/00—Methods of operating air-compressing compression-ignition engines involving introduction of small quantities of fuel in the form of a fine mist into the air in the engine's intake
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ディーゼルエンジンの燃料燃焼方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel combustion method for a diesel engine.
ディーゼルエンジン用燃料は低質化していくと共に、そ
の供給量も減っていく傾向にある。Fuel for diesel engines tends to be of lower quality and its supply is also decreasing.
このうち、低質化していくなかでセタン価が低くなって
いくことが予想される。また供給量不足に対しては、ア
ル；−ル、タールサンド、石炭液化油等の代替燃料の利
用が考えられるが、これらも竜タン価が低いのでディー
ゼルエンジンの燃焼にとって不利である。Among these, it is expected that the cetane number will decrease as the quality deteriorates. In addition, in response to the shortage of supply, it is possible to use alternative fuels such as alcohol, tar sand, and coal liquefied oil, but these also have a low dragontan value and are therefore disadvantageous for combustion in diesel engines.
本発明杖上記のことにかんがみなされたもので、低質で
セタン価が低い燃料であっても燃焼の改善を因ることが
できるようにしたディーゼルエンジンの燃料燃焼方法を
提供しようとするものでおる。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a fuel combustion method for a diesel engine that can improve combustion even when using low quality fuel with a low cetane number. .
メチルアルコールを触媒を用いてリフォームすると下記
の発熱反応でジメチルエーテルが生成される。When methyl alcohol is reformed using a catalyst, dimethyl ether is produced through the exothermic reaction described below.
２Ｃ馬ＯＨ→ＣＭ、α１１＋Ｈ童Ｏ・−・−（１）この
ジメチルエーテル蝶セタン価が高く、含酸素物であるの
で、これをディーゼルエンジンのシリンダ内へ吸入空気
と共に供給してやると、低質でセタン価が低い燃料であ
ってもこれのシリンダ内での燃焼が改善される。2C Horse OH → CM, α11 + H Child O - - - (1) This dimethyl ether has a high cetane number and contains oxygen, so if it is supplied into the cylinder of a diesel engine together with the intake air, it will have a low quality and a cetane number. This improves the combustion of even low fuel in the cylinder.
図面は本発明を実施する際の模式図であり、ダ］中１は
シリンダ、２は吸気バルブ、３は排気パルプ、４は吸気
管、５は排気管である。そして６は反応室で、この反応
室６は排気ｔ＃ｔ５の途中に設けてあり、反応室６全体
が排気ガスにて加熱されるようになっている。反応室６
の出口管７は吸気管４に接続しである。８は反応室６の
入口管である。反応室６内には白金系やクロム酸化物の
触媒が充填しである。９は燃料噴射ノズルである。The drawing is a schematic diagram for carrying out the present invention, in which 1 is a cylinder, 2 is an intake valve, 3 is an exhaust pulp, 4 is an intake pipe, and 5 is an exhaust pipe. 6 is a reaction chamber, and this reaction chamber 6 is provided in the middle of the exhaust gas t#t5, so that the entire reaction chamber 6 is heated by the exhaust gas. Reaction chamber 6
The outlet pipe 7 is connected to the intake pipe 4. 8 is an inlet pipe of the reaction chamber 6. The reaction chamber 6 is filled with a platinum-based or chromium oxide catalyst. 9 is a fuel injection nozzle.
この構成において、反応室６に入口管８よジメチルアル
コールを供給してエンジンを始動しこのときの排気ガス
で２００〜４０００Ｃに加熱すると上記反応室６内で上
記（１）式の反応が生じ、反応室６の出口管７より吸気
管４ヘジメチルエーテルが供給され、これが吸気と共に
吸入され、シリンダ内での燃料の燃焼が促進される。In this configuration, when dimethyl alcohol is supplied to the reaction chamber 6 through the inlet pipe 8, the engine is started, and the exhaust gas from this time is heated to 200 to 4000C, the reaction of formula (1) occurs in the reaction chamber 6. Dimethyl ether is supplied to the intake pipe 4 from the outlet pipe 7 of the reaction chamber 6, and is inhaled together with the intake air to promote combustion of the fuel within the cylinder.
上記（１）式に示す反応は２００〜４００°Ｃと比較的
低温によって生じるが、高温下において銅、亜鉛系、ク
ロム亜鉛系の触媒を用いて反応させると
ＣＩＩＢＯＨ→２Ｈｓ ＋ＣＯ＝−（２）の吸熱反応を
行なう、この生成物である２ Ｂ、、ＣＯはメチルアル
；−ルだけの場合よルア０−発熱量が高くなり燃料の燃
焼促進剤として有効である。The reaction shown in equation (1) above occurs at a relatively low temperature of 200 to 400°C, but when the reaction is carried out at a high temperature using a copper, zinc-based, or chromium-zinc-based catalyst, CIIBOH→2Hs +CO=-(2) This product, 2B,,CO, which undergoes an endothermic reaction, has a higher calorific value than methylalcohol alone and is effective as a combustion promoter for fuels.
従って上記反応室６内に白金系やクロム酸化物のほかに
銅、亜鉛系やクロム、亜鉛系の触媒を充填しておくこと
により、エンジンが低速で排気ガスの温度が比較的低い
場合には、吸気管４にジメチルエーテルが多く供給され
、エンジン回転が上昇して排気ガスの温度が上昇して反
応室６内の反応温度が高くなると吸気管４に２Ｉｉ鵞と
ＣＯが供給され、いずれの場合もシリンダ内での燃料の
燃焼が促進される。Therefore, by filling the reaction chamber 6 with copper, zinc, chromium, and zinc catalysts in addition to platinum and chromium oxides, when the engine is running at low speed and the temperature of the exhaust gas is relatively low, , when a large amount of dimethyl ether is supplied to the intake pipe 4, and as the engine speed increases and the temperature of the exhaust gas rises and the reaction temperature in the reaction chamber 6 increases, 2Ii and CO are supplied to the intake pipe 4. The combustion of fuel within the cylinder is also promoted.
本発明は以上のようになり、燃焼改良剤としてジメチル
エーテルを用いたことにより、燃料の燃焼は改善され、
低質で、しかもセタン価の低い燃料であっても燃費およ
び工ンツションの改善を図ることができる。The present invention is as described above, and by using dimethyl ether as a combustion improver, the combustion of fuel is improved.
Even if the fuel is of low quality and has a low cetane number, it is possible to improve fuel efficiency and performance.
図面鉱本発明の実施態様を示す観略的な６明し１である
。
出願人 株式会社小松製作所
代理人 弁理上米 加 正 草
弁理上演 本 忠BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an embodiment of the present invention. Applicant: Komatsu Ltd. Agent: Patent attorney: Tadashi Moto, Patent attorney: Tadashi Moto
Claims (1)
を特徴とするディーゼルエンジンの燃料燃焼方法。 （り メチルアルコールを触媒を用いると共に排気ガス
で加熱してジメチルエーテルを得るようにし良ことを特
徴とする特許請求の範囲第１項記載のディーゼルエンジ
ンの燃料燃焼方法。 （３） メチルアルコールを反応するための触媒に低
温で反応を起こしやすい触媒と、高温で反応を起こしや
すい触媒を用いたことを特徴とする特許請求の範囲第２
項記載のディーゼルエンジンの燃料燃焼方法。[Scope of Claims] (1) A fuel combustion method for a diesel engine, characterized in that dimethyl ether is used as a combustion improver. (2) A fuel combustion method for a diesel engine according to claim 1, characterized in that dimethyl ether is obtained by heating methyl alcohol with exhaust gas while using a catalyst. (3) Reacting methyl alcohol. Claim 2, characterized in that a catalyst that easily causes a reaction at a low temperature and a catalyst that tends to cause a reaction at a high temperature are used as the catalyst for the
Fuel combustion method for a diesel engine as described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15395181A JPS5857024A (en) | 1981-09-30 | 1981-09-30 | Combustion method of fuel in diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15395181A JPS5857024A (en) | 1981-09-30 | 1981-09-30 | Combustion method of fuel in diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5857024A true JPS5857024A (en) | 1983-04-05 |
Family
ID=15573631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15395181A Pending JPS5857024A (en) | 1981-09-30 | 1981-09-30 | Combustion method of fuel in diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857024A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50106027A (en) * | 1974-01-26 | 1975-08-21 | ||
| JPS50144816A (en) * | 1974-05-13 | 1975-11-20 | ||
| JPS5578156A (en) * | 1978-12-08 | 1980-06-12 | Nissan Motor Co Ltd | Device to accelerate starting and to reduce nox for diesel engine |
-
1981
- 1981-09-30 JP JP15395181A patent/JPS5857024A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50106027A (en) * | 1974-01-26 | 1975-08-21 | ||
| JPS50144816A (en) * | 1974-05-13 | 1975-11-20 | ||
| JPS5578156A (en) * | 1978-12-08 | 1980-06-12 | Nissan Motor Co Ltd | Device to accelerate starting and to reduce nox for diesel engine |
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