JP2771993B2 - How to operate the diesel engine - Google Patents
How to operate the diesel engineInfo
- Publication number
- JP2771993B2 JP2771993B2 JP63253771A JP25377188A JP2771993B2 JP 2771993 B2 JP2771993 B2 JP 2771993B2 JP 63253771 A JP63253771 A JP 63253771A JP 25377188 A JP25377188 A JP 25377188A JP 2771993 B2 JP2771993 B2 JP 2771993B2
- Authority
- JP
- Japan
- Prior art keywords
- diesel engine
- engine
- injection timing
- operate
- aldehydes
- 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 - Lifetime
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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、内燃機関特に自動車用ディーゼルエンジン
の排ガス中のアルデヒド類及びケトン類（Ａ・Ｋ類）を
低減させるエンジン運転方法に関する。Description: FIELD OF THE INVENTION The present invention relates to an engine operating method for reducing aldehydes and ketones (AKs) in exhaust gas of an internal combustion engine, particularly an automobile diesel engine.
従来のエンジン運転技術は、エンジンの性能、燃費及
び既規制物質についての対応が中心であり、メタノール
エンジンの排ガス中に含まれる発ガン性物質であって低
減化が望まれるアルデヒド類及びケトン類（Ａ・Ｋ類）
の噴射タイミングとの関連を述べたものは見当らない。Conventional engine operation technologies mainly deal with engine performance, fuel efficiency and regulated substances, and are aldehydes and ketones (carcinogenic substances contained in exhaust gas of methanol engines, which are desired to be reduced). A / K)
There is no document that describes the relationship with the injection timing.
アルデヒド類及びケトン類（Ａ・Ｋ類）は米国EPA
（環境保護庁）等で発ガン性が指摘され、近い将来に規
制の方向が予想される。しかし自動車排ガス中のＡ・Ｋ
類は低濃度かつ微量であり、その処理技術が確立されて
いない。Aldehydes and ketones (AK) are US EPA
(Environmental Protection Agency) and others point out the carcinogenicity, and the direction of regulation is expected in the near future. However, AK in automobile exhaust gas
The species are low in concentration and in trace amounts, and their processing technology has not been established.
本発明は、燃料噴射タイミングを最適条件に設定する
ことにより、Ａ・Ｋ類を大巾に低減する方法を提供する
ことを目的とするものである。An object of the present invention is to provide a method for significantly reducing AKs by setting a fuel injection timing to an optimum condition.
エンジン排ガス中のＡ・Ｋ類は、後述の第１図及び第
２図に示すように、燃料噴射タイミングに対して特異な
排出挙動を示す。しかもその設定はＡ・Ｋ類の低減を可
能ならしめる要素を含んでいる。本発明ではディーゼル
エンジンにおけるメタノール燃料噴射に際し、上死点よ
り３゜〜10゜遅めにメタノール燃料を噴射させることを
特徴とする。A and K in the engine exhaust gas exhibit a peculiar emission behavior with respect to the fuel injection timing as shown in FIGS. 1 and 2 described later. In addition, the setting includes an element that makes it possible to reduce A and K types. The present invention is characterized in that methanol fuel is injected 3 to 10 degrees later than the top dead center at the time of methanol fuel injection in a diesel engine.
［作用］ 燃料噴射タイミングを最適タイミング位置より更に遅
らせ、上死点より３〜10゜遅めに設定することにより、
エンジン排ガス中のＡ・Ｋ類が減少する。[Function] By delaying the fuel injection timing further from the optimal timing position and setting it 3 to 10 ° later than the top dead center,
A / Ks in engine exhaust gas decrease.
2000ccディーゼルエンジンによるLA−４モード運転で
の燃料噴射タイミングとＡ・Ｋ類（アルデヒド類及びケ
トン類）の排出特性について求めた試験結果を第１図及
び第２図に示す。FIGS. 1 and 2 show test results obtained for the fuel injection timing and emission characteristics of AKs (aldehydes and ketones) in the LA-4 mode operation using a 2000 cc diesel engine.
供試エンジンの運転条件は次の通りである。 The operating conditions of the test engine are as follows.
排気量 2000ccエンジン 運転モード（試験を行ったモード） LA−４モード 燃料 軽油JIS ２号 LA−４モード：エンジンのテスト条件において、テス
ト時間と車速との関係を定めたパターンをいう。Engine displacement mode 2000cc engine Operation mode (mode under test) LA-4 mode Fuel Light oil JIS No. 2 LA-4 mode: A pattern that defines the relationship between test time and vehicle speed under engine test conditions.
アルデヒドとしては、最も代表的なアルデヒドとし
て、アセトアルデヒド及びクロトンアルデヒドを用い、
またケトンとしては、アセトン及びメチルエチルケトン
を用いた。As the aldehyde, acetaldehyde and crotonaldehyde are used as the most representative aldehydes,
As ketone, acetone and methyl ethyl ketone were used.
なお、第１図及び第２図における横軸の角度は、噴射
タイミングをATDCより遅めた角度である。The angles on the horizontal axis in FIGS. 1 and 2 are angles obtained by delaying the injection timing from ATDC.
測定結果にみるように、ディーゼルエンジンのＡ・Ｋ
類排出量、したがってＡ・Ｋ類の排出にともなう有害性
は、燃料噴射タイミングを最適タイミングにより更に遅
らせ、ATDC（上死点）に対し３゜〜10゜遅めに設定する
ことにより抑制できる。As shown in the measurement results, the AK of the diesel engine
Class emissions, and thus the harm associated with emissions of A and K, can be suppressed by further delaying the fuel injection timing by the optimal timing and setting it 3 to 10 degrees later than ATDC (top dead center).
なお、最適タイミングとは、国内における自動車排ガ
ス規制値、例えばNOx濃度、炭化水素量等の条件を満た
すことのできるタイミング（燃料噴射タイミング）を言
い、本テスト供用の一般的な小型ディーゼルエンジンで
は、最適タイミングはピストン上死点のほぼ２゜〜３゜
前である。Note that the optimal timing is a timing (fuel injection timing) at which conditions in Japan such as automobile exhaust gas regulation values, such as NOx concentration and hydrocarbon amount, can be satisfied. The optimum timing is approximately 2 to 3 degrees before the piston top dead center.
［発明の効果］ 本発明は、ディーゼルエンジンにおけるメタノール燃
料噴射に際し、上死点を基準にして３゜〜10゜遅めにメ
タノール燃料を噴射させるものであるから、アセトアル
デヒドやクロトンアルデヒドといったアルデヒド類及び
アセトンやメチルエチルケトンといったケトン類の排出
量を大巾に低減でき、ひいては排ガスによる公害の抑
制、とりわけ最近議論の中心となりつつあるＡ・Ｋ類に
よる発ガン等の問題の解決が可能になる。[Effects of the Invention] In the present invention, when methanol fuel is injected into a diesel engine, methanol fuel is injected 3-10 ° later with reference to the top dead center, so that aldehydes such as acetaldehyde and crotonaldehyde and The emission amount of ketones such as acetone and methyl ethyl ketone can be greatly reduced, and the pollution caused by exhaust gas can be suppressed. In particular, it is possible to solve problems such as carcinogenesis caused by A / Ks, which have recently become the center of discussion.
第１図は本発明の一実施例としてのアルデヒド類の排出
量と噴射タイミングの関係図、第２図は本発明の一実施
例としてのケトン類の排出量と噴射タイミングの関係図
である。FIG. 1 is a diagram showing the relationship between the emission amount of aldehydes and injection timing as one embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between the emission amount of ketones and injection timing as one embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平河内 信義 東京都港区芝５丁目33番８号 三菱自動 車工業株式会社内 (72)発明者 田中 正司 東京都港区芝５丁目33番８号 三菱自動 車工業株式会社内 (56)参考文献 特開 平１−301944（ＪＰ，Ａ) 特開 昭58−144641（ＪＰ，Ａ) 特開 昭57−68534（ＪＰ，Ａ) 特開 昭62−150054（ＪＰ，Ａ) 特開 昭56−156429（ＪＰ，Ａ) 実開 昭57−13846（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Nobuyoshi Hirakawachi 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Shoji Tanaka 5-33-8 Shiba, Minato-ku, Tokyo No. Mitsubishi Motors Corporation (56) References JP-A-1-301944 (JP, A) JP-A-58-146441 (JP, A) JP-A-57-68534 (JP, A) JP-A-62 -150054 (JP, A) JP-A-56-156429 (JP, A) JP-A-57-13846 (JP, U)
Claims (1)
料噴射に際し、上死点より３゜〜10゜遅めにメタノール
燃料を噴射させることを特徴とするメタノールディーゼ
ルエンジンの運転方法。1. A method for operating a methanol diesel engine, comprising injecting methanol fuel 3 to 10 ° later than top dead center when injecting methanol fuel in a diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253771A JP2771993B2 (en) | 1988-10-11 | 1988-10-11 | How to operate the diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253771A JP2771993B2 (en) | 1988-10-11 | 1988-10-11 | How to operate the diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02102329A JPH02102329A (en) | 1990-04-13 |
| JP2771993B2 true JP2771993B2 (en) | 1998-07-02 |
Family
ID=17255915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63253771A Expired - Lifetime JP2771993B2 (en) | 1988-10-11 | 1988-10-11 | How to operate the diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2771993B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3929099B1 (en) | 2020-06-22 | 2023-10-11 | Ricoh Company, Ltd. | Package |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56156429A (en) * | 1980-05-06 | 1981-12-03 | Nissan Motor Co Ltd | Air/fuel ratio control mechanism of alcohol engine |
| JPS5713846U (en) * | 1980-06-26 | 1982-01-23 | ||
| JPS5768534A (en) * | 1980-10-15 | 1982-04-26 | Isuzu Motors Ltd | Fuel injection timing regulator |
| JPS58144641A (en) * | 1982-02-22 | 1983-08-29 | Mazda Motor Corp | Apparatus for controlling fuel injection timing of engine |
| JPS62150054A (en) * | 1985-12-24 | 1987-07-04 | Toyota Motor Corp | Pilot injection control method for electronically controlled diesel engine |
| JPH01301944A (en) * | 1988-01-28 | 1989-12-06 | Mazda Motor Corp | Combustion controller of diesel engine |
-
1988
- 1988-10-11 JP JP63253771A patent/JP2771993B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02102329A (en) | 1990-04-13 |
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