JPS5857024A - Combustion method of fuel in diesel engine - Google Patents

Combustion method of fuel in diesel engine

Info

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
Application number
JP15395181A
Other languages
Japanese (ja)
Inventor
Hidetoshi Nakajima
中島 英俊
Chitose Kawasaki
川崎 千歳
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP15395181A priority Critical patent/JPS5857024A/en
Publication of JPS5857024A publication Critical patent/JPS5857024A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B49/00Methods 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

PURPOSE:To improve consumption of fuel and emission of exhaust even if the fuel is of low quality with a low cetane number, by using dimethyl ether as a combustion improving agent and improving combustion of the fuel. CONSTITUTION:In case of using fuel of low quality with a relatively low cetane number, dimethyl ether as a combustion improving agent is supplied into a cylinder 1 through an intake pipe 4. That is, a reaction chamber 6 is provided in the half way of an exhaust pipe 5, and a catalyzer of platinum system or chrome oxide is filled in said chamber 6, then methyl alcohol is supplied from an inlet pipe 8 of said chamber. At starting of an engine, if the reaction chamber 6 is heated by exhaust gas flowing in the exhaust pipe 5, the dimethyl ether is produced like, for instance, 2CH3OH CH3OCH3+H2O, and supplied into the cylinder 1 with intake air through the intake pipe 4 from an opening pipe 7. In this way, combustion of the fuel of low quality can be promoted.

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.

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

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)

【特許請求の範囲】 (1)燃焼改良剤としてジメチルエーテルを用いたこと
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.
JP15395181A 1981-09-30 1981-09-30 Combustion method of fuel in diesel engine Pending JPS5857024A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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