JPS5925029A - Preheater - Google Patents
PreheaterInfo
- Publication number
- JPS5925029A JPS5925029A JP13375982A JP13375982A JPS5925029A JP S5925029 A JPS5925029 A JP S5925029A JP 13375982 A JP13375982 A JP 13375982A JP 13375982 A JP13375982 A JP 13375982A JP S5925029 A JPS5925029 A JP S5925029A
- Authority
- JP
- Japan
- Prior art keywords
- heat generating
- generating member
- chamber
- preheater
- ceramics
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
-
- 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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
-
- 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
- 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】
本発明は主としてディーゼルエｙジｙの始動のために用
いられる着火補助用予熱装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ignition auxiliary preheating device mainly used for starting a diesel engine.
副室式あるいは直接噴射式ディーゼルエンジンの始動補
助装置としては従来フィル製、シーズ型等のグロープラ
グを副燃焼室内又はシリンダー内に装着し、始動時に該
プラグを通電して赤熱し噴射燃料に着火することによシ
燃焼室内の温度を上昇させ始動を容易にする方法が知ら
れている。Conventionally, as a starting aid for a pre-chamber type or direct injection diesel engine, a fill-made or sheath-type glow plug is installed in the sub-combustion chamber or cylinder, and when starting, the plug is energized to red-hot and ignite the injected fuel. There is a known method of increasing the temperature in the combustion chamber to facilitate starting.
グロープラグの使用は寒冷時における始動等に紘極めて
有効である反面、始動後の通常運転あるいはアイドリン
ク時等の、運転域においては、燃焼室内におけるその存
在が、燃焼性に与える影響の問題があった。すなわち特
に第１図に示す渦流家屋等の場合は、始動後の圧縮行程
において渦流室１内に連絡孔２より流入する空気によっ
て室内に渦流を生ぜしめ、これに燃料噴射ノズル３よル
噴射さね、グループラグによル予熱された燃料によって
混合気を完全燃焼させようとするものであるから、渦流
室ｌ内にグｐ−ゾラグの発熱体４が突出していると始動
後はこれが障害物となってスムーズな渦流形成を阻害す
ることとなりエンジン出力の低下、燃費の悪化、有害な
排気ガスの増大等エンジン性能に悪影響を及はすという
問題点があった。この問題点を軽減するための先行技術
としてＷＸ２図（第１図と同一部分抹同一符号で示す）
に示す如く、グロープラグ発熱体４を渦流室１内の中央
部分へ突出させず渦流室内壁の一部を座ぐルその座ぐり
部１ａにグロープラグ発熱体４の一部又は全部を位置さ
せる構造とし、渦流形成に対する障害を軽減しようとす
るものがあるが、これとても渦流室内面に凹凸部が存在
するため完全なものとは言えなかった。Although the use of glow plugs is extremely effective for starting in cold weather, their presence in the combustion chamber has the problem of affecting combustibility during normal operation after startup or during idle operation. there were. That is, especially in the case of a whirlpool house shown in FIG. 1, air flowing into the whirlpool chamber 1 through the communication hole 2 during the compression stroke after startup generates a whirlpool in the room, which is then injected by the fuel injection nozzle 3. Since the fuel mixture is to be completely combusted by the fuel preheated by the group lug, if the heating element 4 of the group lug protrudes into the swirl chamber l, this will become an obstacle after starting. This obstructs the smooth formation of vortices, resulting in a problem in that engine performance is adversely affected, such as a reduction in engine output, deterioration in fuel efficiency, and an increase in harmful exhaust gas. As a prior art to alleviate this problem, Figure WX2 (same parts as Figure 1 are indicated by the same symbols)
As shown in FIG. 2, a part or all of the glow plug heating element 4 is positioned in the counterbore part 1a of a part of the wall of the swirling chamber 1 without protruding into the central part of the swirling chamber 1. There are some structures that try to reduce the obstacles to vortex formation, but these cannot be called perfect because of the presence of irregularities on the inside of the vortex chamber.
本発明は、このよう彦状況に鑑みなされたものてらって
、着火補助用予熱装置として、従来用いられているグロ
ープラグを別に設けず、燃焼室内に突出物や凹凸部のな
い、室内の渦流形成がスムーズな、着火遅れが少なく燃
焼性の極めて優れた予熱装置を提供しようとするもので
ある。The present invention was developed in view of the above circumstances, and as a preheating device for auxiliary ignition, the present invention eliminates the separate glow plug that is conventionally used, and creates a vortex flow inside the combustion chamber without protruding objects or uneven parts. The present invention aims to provide a preheating device with smooth combustion, little ignition delay, and extremely excellent combustibility.
以下本発明の詳細を付図を用いて説明する。The details of the present invention will be explained below using the accompanying drawings.
第３図及び第４図は本発明予熱装置の一実施例を示した
ものであって、（図中第１図、第２図と同一部分は同一
符号で示す）第３図は本発明予熱装置の渦流室への取付
状態、第４図（イ）はその要部の縦断面、同図（ロ）は
その底部端面を示したものである。Figures 3 and 4 show an embodiment of the preheating device of the present invention. The state in which the device is installed in the vortex chamber, FIG. 4(a) is a vertical cross-section of the main part thereof, and FIG. 4(b) is a view showing the bottom end face.
即ち本発明予熱装置は、渦流室ｌに取付けられた燃料噴
射ノズル３の先端部周囲に形成されたアルミナ磁器等の
酸化物セラミックスあるいは窒化珪素を主体とした非酸
化物セラミックスからなるホル／−５を配設し、燃料の
噴孔６を形成する前記セラミックホルダー５の開放端部
に発熱部材７ｔ−取付け、これに通電するための電極８
を設は一体化し構成してなるものである。That is, the preheating device of the present invention has a hole made of oxide ceramics such as alumina porcelain or non-oxide ceramics mainly composed of silicon nitride formed around the tip of the fuel injection nozzle 3 attached to the swirl chamber l. A heating member 7t is attached to the open end of the ceramic holder 5 forming the fuel nozzle hole 6, and an electrode 8 for energizing the heating member 7t is attached.
The structure is integrated and configured.
発熱部材としては、タングステン、モリブデン、ニッケ
ル等の高融点金属粉に少量の有機結合剤を加えペースト
状としたものをセラミック板にプリントして焼成したも
の、又は前記高融点金属の線をセラミック中に埋設して
なるもの、あるいはＳｉＣ又はＭｏＳｉｘの如き半導性
セラミックなどの耐熱性非金属抵抗体を連設したものと
することができる。As a heat generating member, a paste made by adding a small amount of an organic binder to powder of a high melting point metal such as tungsten, molybdenum, or nickel is printed on a ceramic plate and fired, or a wire of the high melting point metal is placed in a ceramic plate. Alternatively, a heat-resistant nonmetallic resistor such as a semiconducting ceramic such as SiC or MoSix may be connected.
このように構成してなる本発明予熱装置は、燃料噴射ノ
ズルの周囲に設けられたセラミックホルダーの燃料噴孔
部に発熱部材が配設されているため、噴射燃料への着火
が確実で遅れを生じない極めて着火性の優力たものとな
るをｌか、燃焼室内には従来例の如きグロープラグの存
在による突出物や凹凸部等の障害物がないことによって
室内の渦流形成が極めてスムーズに行なわれ、始動後に
おいて着火ミスによるエンジンの出力低下や燃費の悪化
、さらには有害な排気ガスの増加等を生ずることのない
優れた始動補助用予熱装置を提供できるものである。In the preheating device of the present invention configured as described above, since the heat generating member is disposed in the fuel injection hole of the ceramic holder provided around the fuel injection nozzle, the ignition of the injected fuel is reliable and there is no delay. In addition, because there are no obstacles such as protrusions or irregularities in the combustion chamber due to the presence of a glow plug as in conventional examples, the formation of vortices inside the combustion chamber is extremely smooth. Therefore, it is possible to provide an excellent preheating device for assisting starting, which does not cause a decrease in engine output, deterioration of fuel efficiency, or an increase in harmful exhaust gas due to ignition errors after starting.
第１図及び−語２図は、従来例予熱装置の、渦流室への
取付状況を示す縦断面図、第３図は本発明予熱装置の、
渦流室への取付状況を示す縦断面図、第４図Ｕ）は本発
明予熱装置の要部縦断面図、同図←）はその底部端面図
である。1 and 2 are vertical cross-sectional views showing how the conventional preheating device is installed in the swirl chamber, and FIG. 3 is the preheating device of the present invention.
FIG. 4 U) is a vertical cross-sectional view of a main part of the preheating device of the present invention, and FIG. 4 U) is a bottom end view thereof.
Claims (1)
ルの近傍に発熱部材を配設してなる予熱装置において、
燃料噴射ノズルの先端部周囲を覆って、燃料の噴孔を形
成する開放端を有するセラミックホルダーが設けられ、
該セラミックホルダーの開放端部に発熱部材が配設され
ていること特徴とする予熱装置。In a preheating device in which a heat generating member is arranged near a fuel injection nozzle in a combustion chamber or a sub-combustion chamber of a cylinder head,
A ceramic holder is provided that covers the tip of the fuel injection nozzle and has an open end that forms a fuel injection hole,
A preheating device characterized in that a heat generating member is disposed at an open end of the ceramic holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13375982A JPS5925029A (en) | 1982-08-02 | 1982-08-02 | Preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13375982A JPS5925029A (en) | 1982-08-02 | 1982-08-02 | Preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5925029A true JPS5925029A (en) | 1984-02-08 |
Family
ID=15112279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13375982A Pending JPS5925029A (en) | 1982-08-02 | 1982-08-02 | Preheater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5925029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991019083A1 (en) * | 1990-06-04 | 1991-12-12 | Nippon Clean Engine Research Institute Co., Ltd. | Internal combustion engine of hot surface collision ignition type and hot surface collision ignition thereof |
-
1982
- 1982-08-02 JP JP13375982A patent/JPS5925029A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991019083A1 (en) * | 1990-06-04 | 1991-12-12 | Nippon Clean Engine Research Institute Co., Ltd. | Internal combustion engine of hot surface collision ignition type and hot surface collision ignition thereof |
| US5329901A (en) * | 1990-06-04 | 1994-07-19 | Nippon Clean Engine Research Institute Co., Ltd. | Hot surface impact ignition type internal combustion engine and method of hot surface impact ignition |
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