JPH05187224A - Starting method for methanol engine and oxidation catalyst device used in the method - Google Patents
Starting method for methanol engine and oxidation catalyst device used in the methodInfo
- Publication number
- JPH05187224A JPH05187224A JP482392A JP482392A JPH05187224A JP H05187224 A JPH05187224 A JP H05187224A JP 482392 A JP482392 A JP 482392A JP 482392 A JP482392 A JP 482392A JP H05187224 A JPH05187224 A JP H05187224A
- Authority
- JP
- Japan
- Prior art keywords
- oxidation catalyst
- engine
- methanol
- starting
- catalyst
- 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.)
- Withdrawn
Links
Landscapes
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、メタノールを燃料とし
て作動するメタノールエンジンの始動方法及びそれに用
いる酸化触媒装置に関し、エンジン始動時の排気ガス中
に燃焼過程のガス成分が混入するのを防止したものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting a methanol engine that operates with methanol as a fuel and an oxidation catalyst device used for the same, and prevents gas components in the combustion process from being mixed in exhaust gas at the time of engine start. It is a thing.
【０００２】[0002]
【従来の技術】メタノールはその着火温度が４５０℃程
度と高く、比較的着火性が悪い。そのため、メタノール
を燃料とするエンジンでは、その始動時の暖気運転中
に、つまりエンジンの温度が未だ低い状態のときに、排
気ガスの中にメタノールの未燃ガスやホルムアルデヒド
等の燃焼過程のガス成分が混入することがある。従来、
この燃焼過程のガス成分を除去するために、エンジンの
排気経路に白金等の酸化触媒を設け、この酸化触媒のと
ころで燃焼過程のガス成分を燃焼させるようにしてい
る。2. Description of the Related Art Methanol has a high ignition temperature of about 450.degree. Therefore, in an engine that uses methanol as fuel, during the warm-up operation at the time of starting, that is, when the engine temperature is still low, the unburned gas of methanol and the gas components of the combustion process such as formaldehyde are included in the exhaust gas. May be mixed in. Conventionally,
In order to remove the gas component in the combustion process, an oxidation catalyst such as platinum is provided in the exhaust path of the engine, and the gas component in the combustion process is burned at the oxidation catalyst.
【０００３】[0003]
【発明が解決しようとする課題】ところが、低温環境等
におけるエンジン始動直後は、未だ酸化触媒が十分に活
性化されておらず、それが活性化されるまでの間は燃焼
過程のガス成分が完全には除去されずに排出されてしま
う。However, immediately after the engine is started in a low temperature environment or the like, the oxidation catalyst is not yet sufficiently activated, and until it is activated, the gas components in the combustion process are completely removed. Will not be removed and will be discharged.
【０００４】本発明は、暖気運転の初期、つまり始動の
直後から燃焼過程のガス成分が排気ガス中に混入するの
を防止することを目的としている。An object of the present invention is to prevent the gas components in the combustion process from being mixed in the exhaust gas immediately after the warm-up operation, that is, immediately after the start-up.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
の本発明にかかるメタノールエンジンの始動方法は、排
気経路に酸化触媒を具えたメタノールエンジンにおい
て、前記酸化触媒を加熱すると共に該酸化触媒にメタノ
ールを吹きかけて着火させ、その後前記酸化触媒の温度
がその活性温度に達した後、エンジンを始動することを
特徴とする。To achieve this object, a method for starting a methanol engine according to the present invention is a methanol engine having an oxidation catalyst in an exhaust path, wherein the oxidation catalyst is heated and the oxidation catalyst is used. It is characterized in that the engine is started after the temperature of the oxidation catalyst reaches its activation temperature by blowing methanol for ignition.
【０００６】また、本発明にかかるメタノールエンジン
用酸化触媒装置は、メタノールエンジンの排気経路に設
けられる酸化触媒装置において、酸化触媒と、前記酸化
触媒を加熱する触媒ヒータと、前記酸化触媒にメタノー
ルを吹きかける噴射装置と、エンジンの始動に先立って
前記触媒ヒータと前記噴射装置を作動させる制御装置と
を具えたことを特徴とする。The oxidation catalyst device for a methanol engine according to the present invention is an oxidation catalyst device provided in an exhaust path of a methanol engine, wherein an oxidation catalyst, a catalyst heater for heating the oxidation catalyst, and methanol for the oxidation catalyst are provided. An injection device for spraying and a control device for operating the catalyst heater and the injection device before starting the engine are provided.
【０００７】[0007]
【作用】酸化触媒を加熱すると共にメタノールを吹きか
けると、メタノールは殆ど瞬時に着火し、その燃焼によ
る熱によって酸化触媒全体が迅速に加熱されて酸化触媒
は直ぐに活性温度に達する。その後、エンジンを始動す
ることにより、既に活性化されている酸化触媒の働きに
よって排気ガス中の燃焼過程のガス成分が燃焼し、燃焼
過程のガス成分が外部に排出されるのが防止される。When the oxidation catalyst is heated and sprayed with methanol, the methanol is ignited almost instantly, and the heat generated by the combustion rapidly heats the entire oxidation catalyst, and the oxidation catalyst reaches the active temperature immediately. After that, by starting the engine, it is possible to prevent the gas component of the combustion process in the exhaust gas from being burned by the action of the oxidation catalyst that has already been activated, and the gas component of the combustion process to be discharged to the outside.
【０００８】[0008]
【実施例】図１は本発明の一実施例にかかるメタノール
エンジン用の酸化触媒装置の構成図である。図１におい
て、１は酸化触媒、２はその担体である。触媒担体２は
メタノールエンジンの排気管３の途中に設けられ、その
中に酸化触媒１を収容する。また触媒担体２内には、酸
化触媒１の排気ガスの流れ方向（図１中で矢印で示す）
の上流側にこの酸化触媒１を加熱する触媒ヒータ４が配
設され、さらに、この触媒ヒータ４の上流側には酸化触
媒１にメタノールを吹きかける噴射ノズル装置５が配設
されている。これらの触媒ヒータ４と噴射ノズル装置５
は制御装置６によってその作動を制御されるようになっ
ている。FIG. 1 is a schematic diagram of an oxidation catalyst device for a methanol engine according to an embodiment of the present invention. In FIG. 1, 1 is an oxidation catalyst and 2 is its carrier. The catalyst carrier 2 is provided in the middle of the exhaust pipe 3 of the methanol engine, and houses the oxidation catalyst 1 therein. Further, in the catalyst carrier 2, the flow direction of the exhaust gas of the oxidation catalyst 1 (indicated by an arrow in FIG. 1)
A catalyst heater 4 for heating the oxidation catalyst 1 is arranged upstream of the catalyst heater 4, and an injection nozzle device 5 for blowing methanol to the oxidation catalyst 1 is arranged upstream of the catalyst heater 4. These catalyst heater 4 and injection nozzle device 5
Is controlled in its operation by the control device 6.
【０００９】制御装置６は、スタータスイッチ等によっ
てエンジン始動の意志が伝えられると、エンジンの始動
に先立って先ず、噴射ノズル装置５を作動させてメタノ
ールを触媒ヒータ４と酸化触媒１に向けて噴射させ、そ
の後触媒ヒータ４に通電してそれを赤熱させる。尚、噴
射ノズル装置５によるメタノールの噴射と触媒ヒータ４
の加熱は同時に行ってもよく、あるいはその作動の順序
を逆にしてもよい。その後、制御装置６は酸化触媒１の
温度がその活性温度に達した後、実際にエンジンを始動
させる。When the intention of starting the engine is transmitted by a starter switch or the like, the control device 6 first activates the injection nozzle device 5 to inject methanol toward the catalyst heater 4 and the oxidation catalyst 1 before starting the engine. After that, the catalyst heater 4 is energized to make it red hot. The injection nozzle device 5 injects methanol and the catalyst heater 4
The heating may be carried out simultaneously, or the order of their operations may be reversed. After that, the control device 6 actually starts the engine after the temperature of the oxidation catalyst 1 reaches its activation temperature.
【００１０】ここで、前述のように、メタノールを吹き
かけて酸化触媒１を加熱すると、メタノールは殆ど瞬時
に着火し、その燃焼による熱によって酸化触媒１全体が
迅速に加熱されて酸化触媒１は直ぐに活性温度に達す
る。酸化触媒１が活性温度に達したか否かは、例えば実
際に酸化触媒１の温度を監視して知ってもよいし、活性
化するに十分な予め決められた時間（例えば、１分間乃
至２分間）の経過を待ってこれを判断するようにしても
よい。As described above, when methanol is blown to heat the oxidation catalyst 1, the methanol is ignited almost instantly, and the heat generated by the combustion rapidly heats the entire oxidation catalyst 1 so that the oxidation catalyst 1 is immediately heated. Reach activation temperature. Whether or not the oxidation catalyst 1 has reached the activation temperature may be known by, for example, actually monitoring the temperature of the oxidation catalyst 1, or may be determined by a predetermined time (for example, 1 minute to 2 minutes) sufficient for activation. It may be possible to judge this after waiting the elapse of (minutes).
【００１１】そしてその後、エンジンを始動することに
より、既に活性化されている酸化触媒１の働きによって
排気ガス中の未燃ガスやホルムアルデヒド等の燃焼過程
のガス成分が燃焼し、それらが外部に排出されるのが防
止される。After that, when the engine is started, the gas components in the combustion process such as unburned gas and formaldehyde in the exhaust gas are burned by the action of the oxidation catalyst 1 which has already been activated, and they are discharged to the outside. Is prevented.
【００１２】図２は本発明の一実施例にかかるメタノー
ルエンジンの始動方法を表すフローチャートである。図
２において、エンジンの始動意志が伝えられると、先ず
ステップＳ１で酸化触媒に燃料であるメタノールを噴射
すると共に、ステップＳ２で酸化触媒を加熱する。その
後、ステップＳ３で酸化触媒がその活性温度である３０
０℃に達した後、エンジンを始動させる。FIG. 2 is a flowchart showing a method for starting a methanol engine according to an embodiment of the present invention. In FIG. 2, when the intention to start the engine is transmitted, first, in step S1, methanol, which is a fuel, is injected into the oxidation catalyst, and in step S2, the oxidation catalyst is heated. Then, in step S3, the oxidation catalyst is at its activation temperature 30.
After reaching 0 ° C, start the engine.
【００１３】尚、この方法において、各ステップは操作
者が手動にて行ってもよいし、制御装置によって自動的
に行ってもよい。In this method, each step may be performed manually by an operator or automatically by a control device.
【００１４】[0014]
【発明の効果】以上のように本発明によれば、酸化触媒
を加熱すると共に酸化触媒にメタノールを吹きかけて着
火させ、その後酸化触媒の温度がその活性温度に達した
後にエンジンを始動するようにしたので、実際にエンジ
ンが始動するときには既に活性化されている酸化触媒の
働きによって排気ガス中の燃焼過程のガス成分が燃焼
し、燃焼過程のガス成分が外部に排出されるのを防止す
ることができる。As described above, according to the present invention, the oxidation catalyst is heated and the oxidation catalyst is blown with methanol to be ignited, and then the engine is started after the temperature of the oxidation catalyst reaches its activation temperature. Therefore, when the engine is actually started, it is necessary to prevent the gas components of the combustion process in the exhaust gas from burning due to the action of the oxidation catalyst that has already been activated, and the gas components of the combustion process from being discharged to the outside. You can
【図１】 本発明の一実施例にかかるメタノールエンジ
ン用の酸化触媒装置の構成図FIG. 1 is a configuration diagram of an oxidation catalyst device for a methanol engine according to an embodiment of the present invention.
【図２】 本発明の一実施例にかかるメタノールエンジ
ンの始動方法を表すフローチャートFIG. 2 is a flowchart showing a method for starting a methanol engine according to an embodiment of the present invention.
１：酸化触媒 ２：触媒担体 ３：排気管 ４：触媒ヒータ ５：噴射ノズル装置 ６：制御装置 1: Oxidation catalyst 2: Catalyst carrier 3: Exhaust pipe 4: Catalyst heater 5: Injection nozzle device 6: Control device
Claims (2)
ンジンの始動方法において、前記酸化触媒を加熱すると
共に該酸化触媒にメタノールを吹きかけて着火させ、そ
の後前記酸化触媒の温度がその活性温度に達した後、エ
ンジンを始動することを特徴とするメタノールエンジン
の始動方法。1. A method of starting a methanol engine having an oxidation catalyst in an exhaust path, wherein the oxidation catalyst is heated and methanol is blasted to ignite, and then the temperature of the oxidation catalyst reaches its activation temperature. After that, the method for starting a methanol engine is characterized in that the engine is started.
る酸化触媒装置において、酸化触媒と、前記酸化触媒を
加熱する触媒ヒータと、前記酸化触媒にメタノールを吹
きかける噴射装置と、エンジンの始動に先立って前記触
媒ヒータと前記噴射装置を作動させる制御装置とを具え
たことを特徴とするメタノールエンジン用酸化触媒装
置。2. An oxidation catalyst device provided in an exhaust path of a methanol engine, an oxidation catalyst, a catalyst heater for heating the oxidation catalyst, an injection device for spraying methanol on the oxidation catalyst, and an engine for starting the engine before starting the engine. An oxidation catalyst device for a methanol engine, comprising a catalyst heater and a control device for operating the injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP482392A JPH05187224A (en) | 1992-01-14 | 1992-01-14 | Starting method for methanol engine and oxidation catalyst device used in the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP482392A JPH05187224A (en) | 1992-01-14 | 1992-01-14 | Starting method for methanol engine and oxidation catalyst device used in the method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05187224A true JPH05187224A (en) | 1993-07-27 |
Family
ID=11594431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP482392A Withdrawn JPH05187224A (en) | 1992-01-14 | 1992-01-14 | Starting method for methanol engine and oxidation catalyst device used in the method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05187224A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19641817A1 (en) * | 1995-04-14 | 1998-04-16 | Ishikawajima Harima Heavy Ind | Classifier for cement mfr installation |
| WO1999017005A1 (en) * | 1997-09-30 | 1999-04-08 | Siemens Aktiengesellschaft | Method and device for cleaning exhaust gases in a combustion system |
-
1992
- 1992-01-14 JP JP482392A patent/JPH05187224A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19641817A1 (en) * | 1995-04-14 | 1998-04-16 | Ishikawajima Harima Heavy Ind | Classifier for cement mfr installation |
| WO1999017005A1 (en) * | 1997-09-30 | 1999-04-08 | Siemens Aktiengesellschaft | Method and device for cleaning exhaust gases in a combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |