JPH01257758A - Vaporizing glow plug - Google Patents
Vaporizing glow plugInfo
- Publication number
- JPH01257758A JPH01257758A JP8449788A JP8449788A JPH01257758A JP H01257758 A JPH01257758 A JP H01257758A JP 8449788 A JP8449788 A JP 8449788A JP 8449788 A JP8449788 A JP 8449788A JP H01257758 A JPH01257758 A JP H01257758A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- heating wire
- glow plug
- fuel flow
- flow passage
- 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
- 230000008016 vaporization Effects 0.000 title claims abstract description 36
- 239000000446 fuel Substances 0.000 claims abstract description 82
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 238000009834 vaporization Methods 0.000 claims description 15
- 238000013021 overheating Methods 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は車両暖房用の燃焼器に使用する気化グロープラ
グに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vaporizing glow plug used in a combustor for vehicle heating.
（従来の技術）
寒冷時に車室内の暖房を行う暖房装置として、従来から
エンジン冷却水の上昇した温度を利用して空気を温め、
これを車室に送気して暖房を行う暖房装置が使用されて
いるが、冷却水温度の上昇にはエンジン始動より時間を
要するため、エンジンとは別に燃料を燃焼させる燃焼器
を備え、燃焼熱により空気を加温して車室内を暖房する
暖房装置が寒冷地では一部に用いられている。(Conventional technology) As a heating device that heats the interior of a vehicle during cold weather, conventional technology uses the increased temperature of engine cooling water to warm the air.
A heating system is used that heats the passenger compartment by sending this air into the passenger compartment, but because it takes time to raise the temperature of the cooling water than it takes to start the engine, a combustor is installed that burns fuel separately from the engine. Heating devices that use heat to heat the air inside a vehicle are used in some cold regions.
そしてこの種の暖房装置に使用する燃焼器として、燃料
の気化室と燃焼室とを整流板にて仕切り、気化室に気化
燃料噴出用のノズルを有する燃料気化装置を備えた燃焼
器の提案か特開昭６２−６９００９号公報に開示されて
いる。As a combustor for use in this type of heating system, we propose a combustor equipped with a fuel vaporization device in which the fuel vaporization chamber and the combustion chamber are separated by a baffle plate, and the vaporization chamber has a nozzle for ejecting vaporized fuel. It is disclosed in Japanese Patent Application Laid-Open No. 62-69009.
このような燃料気化装置に用いる気化グロープラグは第
２図に示すように燃焼器２０に下方より斜に挿入される
ように取付けられており、焼判供給管１１から供給され
た燃料は内部のヒータとなる電熱線１２の加熱により気
化され、先端のノズル１３より燃焼器２０内に気化燃料
として噴出し、点火グロープラグ２１により着火される
よう構成されている。The vaporizing glow plug used in such a fuel vaporizing device is installed so as to be inserted diagonally from below into the combustor 20 as shown in FIG. The fuel is vaporized by heating with a heating wire 12 serving as a heater, is injected as vaporized fuel into a combustor 20 from a nozzle 13 at the tip, and is ignited by an ignition glow plug 21.
そして気化グロープラグ１０の燃料供給管に燃料を送油
すると、燃焼器に斜に取付けられているため燃料供給管
に近い部分の液体状態の燃料には大熱量を与えて気化を
促し、上方の部分は気化しているので熱量を控える必要
かあり、このため加熱用電熱線のピッチの粗密度を変化
させて、第３図の電熱線の説明図に示すように燃料供給
管に近い板木部分（Ａ）は密にし発熱量を犬にして気化
を促進させ、気化後のノズルに近い部分（Ｂ）は粗とな
るよう電熱線を分布させている。Then, when fuel is sent to the fuel supply pipe of the vaporizing glow plug 10, since it is installed obliquely in the combustor, a large amount of heat is given to the liquid fuel near the fuel supply pipe, promoting vaporization, and the fuel is vaporized upward. Since the part is vaporized, it is necessary to reduce the amount of heat, so by changing the pitch density of the heating wire, as shown in the explanatory diagram of the heating wire in Figure 3, it is necessary to reduce the amount of heat. The heating wires are distributed so that the portion (A) is dense to reduce the amount of heat generated to promote vaporization, and the portion (B) near the nozzle after vaporization is coarse.
（発明が解決しようとする課題）
上述のような気化グロープラグにおいては、−！１１−
の電熱線の粗密度変化により燃料流路における発熱分布
を変化させているため、板木部分にて燃料の気化が進む
と、燃料の気化熱のため電熱線の温度か奪われて温度低
下する。この温度低下にて温度抵抗係数に基づく電気抵
抗値が小となって電熱線への電流が増加することにより
、ノズルに近い部分の電熱線の発熱量か大となり、電熱
線のオーバーヒートや気化燃料か過熱する不具合を生ず
る。(Problem to be Solved by the Invention) In the vaporizing glow plug as described above, -! 11-
The distribution of heat generation in the fuel flow path changes due to changes in the density of the heating wires, so as the fuel vaporizes in the wooden board, the heat of vaporization of the fuel takes away the temperature of the heating wires, causing the temperature to drop. . Due to this temperature drop, the electrical resistance value based on the temperature resistance coefficient becomes smaller and the current to the heating wire increases, which increases the amount of heat generated by the heating wire near the nozzle, causing overheating of the heating wire and vaporized fuel. Otherwise, it may cause problems such as overheating.
本発明はこのような問題に鑑みてなされたものてあり、
その目的は気化グロープラグの燃料流路の発熱量分布を
適正に保持しようとするヒータを有する気化グロープラ
グを提供するにある。The present invention has been made in view of such problems,
The purpose is to provide a vaporizing glow plug that has a heater that attempts to maintain an appropriate calorific value distribution in the fuel flow path of the vaporizing glow plug.
（課題を解決するための手段）
本発明によれば、燃料流路に電熱線よりなるヒータを備
えて送油された燃料を気化して噴出せしめる気化グロー
プラグにおいて、前記ヒータを複数ケ所に備えた気化グ
ロープラグか提供される。(Means for Solving the Problems) According to the present invention, in a vaporizing glow plug that includes a heater made of a heating wire in a fuel flow path to vaporize and eject the supplied fuel, the heater is provided at a plurality of locations. A vaporized glow plug is provided.
（作用）
本発明では、気化前の大きい熱量を要する液体状態の燃
料の経路には複電熱線のヒータと晶型熱線のヒータの一
部とを一緒に配し、気化後の燃料の経路には晶型熱線の
ヒータの残部のみを配したので、それぞれ燃料の必要と
する熱量に応したヒータからの熱量か与えられる作用か
ある。(Function) In the present invention, a compound heating wire heater and a part of a crystalline heating wire heater are placed together in the path of the liquid fuel that requires a large amount of heat before vaporization, and the fuel path after vaporization is Since only the remainder of the crystal type hot wire heater is disposed, the effect is that the amount of heat from the heater is given in accordance with the amount of heat required by the fuel.
（実施例）
つぎに本発明の実施例について図面を用いて詳細に説明
する。(Example) Next, an example of the present invention will be described in detail using the drawings.
第１図は本発明の一実施例の切断した断面図てあり、図
において１は気化グロープラグで、前述の第２図に示す
燃焼器２０のように下方より斜に挿入して取付ける燃焼
器に用いるプラグである。FIG. 1 is a cutaway sectional view of one embodiment of the present invention, and in the figure, 1 is a vaporizing glow plug, which is installed in a combustor by inserting it diagonally from below, like the combustor 20 shown in FIG. This is a plug used for.
２は燃料供給管で、図示していない燃料ポンプから供給
される燃料を気化グロープラグ１の燃料流路３に導くも
のであり、燃料流路３の先端部にはノズル４か設けられ
、燃料流路３内にて気化された燃料の噴出穴が開口して
いる。Reference numeral 2 denotes a fuel supply pipe, which guides fuel supplied from a fuel pump (not shown) to the fuel passage 3 of the vaporizing glow plug 1. A nozzle 4 is provided at the tip of the fuel passage 3, and a nozzle 4 is provided at the tip of the fuel passage 3. An ejection hole for vaporized fuel in the flow path 3 is open.
５はヒータとなる晶型熱線、６はヒータとなる複電熱線
てともに燃料流路３の長手方向に平行して設けられ、バ
ッテリからの給電により発熱して燃料供給管２から導か
れる燃料を加熱するもので、晶型熱線５は燃料流路３の
殆ど全域にわたって長く張設され、複電熱線６は燃料供
給管２の近傍の所定部分のみに張設されており、晶型熱
線５および複電熱線６はともに巻ビッヂを揃えた粗密の
同一な電熱線か用いられている。そしてこれらの電熱線
のそれぞれの一端は電気的に気化グロープラグ１の本体
に接続され、他の一端は絶縁物の基部７を貫通してそれ
ぞれ給電用の端子５ａおよび端子６ａに接続されている
。Reference numeral 5 indicates a crystal heating wire serving as a heater, and reference numeral 6 indicates a double heating wire serving as a heater, both of which are provided parallel to the longitudinal direction of the fuel flow path 3, and which generate heat due to power supply from the battery and carry the fuel led from the fuel supply pipe 2. The crystal hot wire 5 is stretched long over almost the entire area of the fuel flow path 3, and the double heating wire 6 is stretched only in a predetermined part near the fuel supply pipe 2, and the crystal hot wire 5 and For the double heating wires 6, heating wires of the same coarseness and density with the same winding bits are used. One end of each of these heating wires is electrically connected to the main body of the vaporizing glow plug 1, and the other end passes through the base 7 of the insulator and is connected to a power supply terminal 5a and a terminal 6a, respectively. .
つぎに上述の構成になる本実施例の作動を説明する。Next, the operation of this embodiment configured as described above will be explained.
ます、第２図に示す燃焼器２０のような燃焼器に下方よ
り気化グロープラグ１を斜に挿入して取付ける。First, the vaporizing glow plug 1 is installed by obliquely inserting it into a combustor such as the combustor 20 shown in FIG. 2 from below.
燃料の人口となる燃料供給管２を通して燃料を送油する
とともに、バッテリからの電力を気化グロープラグ１の
本体と、端子５ａおよび端子６ａとの間に通電する。な
お、端子６ａとバッテリとの間には所定の抵抗値を有す
る制御器が直列接続に挿入され、晶型熱線５と複電熱線
６との互いの抵抗値の差異を制御器を接続することによ
り補っている。Fuel is fed through the fuel supply pipe 2, which serves as the fuel source, and electric power from the battery is passed between the main body of the vaporizing glow plug 1 and the terminals 5a and 6a. Note that a controller having a predetermined resistance value is inserted in series between the terminal 6a and the battery, and the controller is connected to measure the difference in resistance between the crystal heating wire 5 and the double heating wire 6. It is supplemented by
燃料供給管２から燃料流路３に送油された燃料は、通電
されて高温度となった両型熱線５．６に触れて燃料温度
が上昇し、燃料流路３の下方の燃料供給管２の近傍は送
油直後のため低温度で液体のままであるが、所定気化温
度に達した燃料は気化して上方に進み、圧力が上昇して
ノズル４の噴用穴より気化燃料か噴出することになる。The fuel sent from the fuel supply pipe 2 to the fuel flow path 3 comes into contact with the two-type hot wire 5.6, which has been energized and has a high temperature, and the fuel temperature rises. The area near point 2 remains liquid at a low temperature because it has just been pumped, but when the fuel reaches a predetermined vaporization temperature, it vaporizes and moves upward, the pressure rises, and vaporized fuel is ejected from the injection hole of nozzle 4. I will do it.
このような燃料の気化が行われるとき、燃料供給管２の
近傍の燃料は送油直後て低温度であり、さらに気化熱を
要するので大熱量を必要とするか、燃料供給管２の近傍
は複電熱線６と圧電熱線５とか設りられているので、両
者の発熱量が加わることにより燃料温度を気化温度まで
上昇させて燃料を十分に気化させることになる。また、
燃料流路３の」三方部分の気化された燃料は圧電熱線５
のみにより加熱され、過熱することなくカス圧をＪ二Ｈ
させて噴出することになる。When such fuel vaporization is performed, the fuel near the fuel supply pipe 2 is at a low temperature immediately after the oil is sent, and further vaporization heat is required, so a large amount of heat is required, or the fuel near the fuel supply pipe 2 is at a low temperature. Since the double electric heating wire 6 and the piezoelectric heating wire 5 are provided, the heat generation amount of both is added to raise the fuel temperature to the vaporization temperature and sufficiently vaporize the fuel. Also,
The vaporized fuel in the three-sided portion of the fuel flow path 3 is transferred to the piezoelectric heating wire 5.
Heated only by J2H without overheating the gas pressure
It will make you squirt.
以上本発明を上述の一実施例によって説明したか、本発
明の主旨の範囲内で種々の変形が可能であり、これらを
本発明の範囲から排除するものではない。Although the present invention has been described above with reference to the above-mentioned embodiment, various modifications can be made within the scope of the gist of the present invention, and these are not excluded from the scope of the present invention.
（発明の効果）
本発明によれは、気化グロープラグの燃料供給管の近傍
の燃料流路内に複電熱線のヒータと、燃料流路の全域に
圧電熱線のヒータとを配設して供給燃料を気化するのて
、燃料の気化のため大熱量を要する燃料供給管の近傍は
長短二種類の電熱線が配置され、小熱量で足りる上方部
分の燃料流路には圧電熱線のみが配置されることになり
、燃料流路内の発熱量分布か適正に保持される効果があ
る。(Effects of the Invention) According to the present invention, a double heating wire heater is disposed in the fuel flow path near the fuel supply pipe of the vaporizing glow plug, and a piezoelectric heating wire heater is provided throughout the fuel flow path to supply the fuel. Two types of heating wires, long and short, are placed near the fuel supply pipe, which requires a large amount of heat to vaporize the fuel, and only piezoelectric heating wires are placed in the upper fuel flow path, which requires a small amount of heat. This has the effect of maintaining an appropriate calorific value distribution within the fuel flow path.
また本発明によれは、燃料流路の発熱量の分布を粗密度
の異なる電熱線を使用せずに、単一のピッチのものを二
種類使用して、燃料気化に必要とする熱量に対応させた
ので、電熱線のオーバヒートや過熱による燃料のカーボ
ン化などが避けられる利点かある。In addition, according to the present invention, the distribution of heat value in the fuel flow path can be adjusted to the amount of heat required for fuel vaporization by using two types of heating wires with a single pitch, instead of using heating wires with different density. This has the advantage of avoiding overheating of heating wires and carbonization of fuel due to overheating.
第１図は本発明の一実施例の断面図、第２図は気化グロ
ープラグと燃焼器との説明図、第３図は従来の電熱線の
説明図である。
１・・・気化グロープラグ、２・・・燃料供給路、３・
・・燃料流路、５・・・圧電熱線、６・・・複電熱線、
２０・・・燃焼器。
特許出願人 いす＼自動車株式会社FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an explanatory view of a vaporizing glow plug and a combustor, and FIG. 3 is an explanatory view of a conventional heating wire. 1... vaporizing glow plug, 2... fuel supply path, 3...
... Fuel flow path, 5... Piezoelectric heating wire, 6... Double heating wire,
20... Combustor. Patent applicant: Isu＼Jidosha Co., Ltd.
Claims (2)
れた燃料を気化して噴出せしめる気化グロープラグにお
いて、前記ヒータを複数ケ所に備えたことを特徴とする
気化グロープラグ。(1) A vaporizing glow plug that is equipped with a heater made of a heating wire in a fuel flow path to vaporize and eject the supplied fuel, characterized in that the heater is provided at a plurality of locations.
燃料流路の全域の燃料の経路との２ケ所に備えたことを
特徴とする請求項（１）記載の気化グロープラグ。(2) The vaporizing glow plug according to claim 1, wherein the heater is provided at two locations: a path for fuel before vaporization, and a path for fuel throughout the entire fuel flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8449788A JPH01257758A (en) | 1988-04-06 | 1988-04-06 | Vaporizing glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8449788A JPH01257758A (en) | 1988-04-06 | 1988-04-06 | Vaporizing glow plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01257758A true JPH01257758A (en) | 1989-10-13 |
Family
ID=13832280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8449788A Pending JPH01257758A (en) | 1988-04-06 | 1988-04-06 | Vaporizing glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01257758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007992A3 (en) * | 1997-08-05 | 1999-04-15 | Markus Kalla | Fuel preheater for a piston internal combustion engine with heat vaporization of the fuel |
-
1988
- 1988-04-06 JP JP8449788A patent/JPH01257758A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007992A3 (en) * | 1997-08-05 | 1999-04-15 | Markus Kalla | Fuel preheater for a piston internal combustion engine with heat vaporization of the fuel |
| US6213103B1 (en) | 1997-08-05 | 2001-04-10 | Markus Kalla | Fuel preheater for a piston internal combustion engine with heat vaporization of the fuel |
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