JP3035267B2 - Glow plug - Google Patents
Glow plugInfo
- Publication number
- JP3035267B2 JP3035267B2 JP10140875A JP14087598A JP3035267B2 JP 3035267 B2 JP3035267 B2 JP 3035267B2 JP 10140875 A JP10140875 A JP 10140875A JP 14087598 A JP14087598 A JP 14087598A JP 3035267 B2 JP3035267 B2 JP 3035267B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- glow plug
- heating
- wake
- generated
- 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 - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims description 66
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 241000375392 Tana Species 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ディーゼルエンジ
ンや各種燃焼器に用いられて好適なグロープラグに関す
る。The present invention relates to a glow plug suitable for use in diesel engines and various combustors.
【０００２】[0002]
【従来の技術】ディーゼルエンジンの始動補助装置とし
て、図７に示すようなグロープラグが用いられること
は、良く知られている。2. Description of the Related Art It is well known that a glow plug as shown in FIG. 7 is used as an auxiliary device for starting a diesel engine.
【０００３】図７のグロープラグは、所謂シーズド形で
あり、ハウジング１にスリーブ２を介して支持されたセ
ラミックス製シース（発熱素子）３の中に発熱体コイル
４が入れられて図示しない充填材により固定されてな
る。そして、発熱体コイル４にリード線５ａ，５ｂを介
して結線された正，負電極６ａ，６ｂ間に電源（バッテ
リ）７からの電圧が印加されて前記発熱体コイル４が発
熱することで、シース３の一部が赤熱して（図中赤熱部
参照）発火点となるようになっている。尚、図中８は絶
縁体で、９は取付用ねじ部である。The glow plug shown in FIG. 7 is of a so-called seeded type, in which a heating element coil 4 is placed in a ceramic sheath (heating element) 3 supported on a housing 1 via a sleeve 2 and a filler (not shown). It is fixed by. Then, a voltage from a power supply (battery) 7 is applied between the positive and negative electrodes 6a and 6b connected to the heating element coil 4 via the lead wires 5a and 5b, and the heating element coil 4 generates heat. A portion of the sheath 3 glows red (see the glowing portion in the figure) and becomes an ignition point. In the drawing, reference numeral 8 denotes an insulator, and reference numeral 9 denotes a mounting screw portion.
【０００４】[0004]
【発明が解決しようとする課題】ところが、従来のグロ
ープラグにあっては、例えばディーゼルエンジンの排気
微粒子を低減する排気浄化装置「ディーゼル・パティキ
ュレート・フィルター（ＤＰＦ）装置」（黒煙除去装置
ともいう）に用いられる予燃焼器等において、低酸素濃
度の排気ガスに軽油等の燃料を混合して着火させる際、
流動条件によってはうまく着火しない場合があり、着火
させるのに高電圧を要し、電力消費が増大するという問
題点があった。However, in the conventional glow plug, for example, an exhaust gas purifying device "Diesel Particulate Filter (DPF) device" (together with a black smoke removing device) for reducing the particulate matter of a diesel engine is disclosed. When the fuel such as light oil is mixed with the exhaust gas with low oxygen concentration and ignited in the pre-combustor etc.
Depending on the flow conditions, ignition may not be performed well, a high voltage is required to ignite, and power consumption increases.
【０００５】そこで、本発明は、着火性を向上させて省
電力が図れると共に使い勝手のあるグロープラグを提供
することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a glow plug which can improve ignitability, save power, and is easy to use.
【０００６】[0006]
【課題を解決するための手段】前述した課題を解決する
ための、本発明によるグロープラグは、燃焼室に臨設さ
れるグロープラグの発熱素子を、ガス流れの方向に沿っ
て二本配置し、上流側の発熱素子で後流を発生させ、発
生した後流の中に下流側の発熱素子を位置させたことを
特徴とする。According to the present invention, there is provided a glow plug according to the present invention, in which two heating elements of a glow plug provided in a combustion chamber are arranged along a gas flow direction . A wake is generated by the upstream heating element,
The heating element on the downstream side is located in the generated downstream .
【０００７】また、前記ガス流れの下流側に位置する発
熱素子を上流側の発熱素子に接触させると共に所定寸法
だけ引っ込めて段違いに配置したことを特徴とする。Further, the heat generating element located on the downstream side of the gas flow is brought into contact with the heat generating element on the upstream side, and is retracted by a predetermined dimension so as to be arranged stepwise.
【０００８】また、前記二本の発熱素子の発熱体コイル
を電源に対し直列に接続したことを特徴とする。Further, the heating element coils of the two heating elements are connected in series to a power supply.
【０００９】[0009]
【発明の実施の形態】以下、本発明に係るグロープラグ
を実施例により図面を用いて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a glow plug according to the present invention will be described in detail with reference to the drawings with reference to embodiments.
【００１０】［第１実施例］ ［構成］図１は本発明の第１実施例を示すグロープラグ
の構造説明図、図２は同じく発熱素子の発熱体コイルの
回路接続図、図３は同じく発熱素子の発熱体コイルの別
の回路接続図である。尚、図１乃至図３において、図７
と同一部材には同一符号を付して詳しい説明は省略す
る。[First Embodiment] [Structure] FIG. 1 is an explanatory view of the structure of a glow plug showing a first embodiment of the present invention, FIG. 2 is a circuit connection diagram of a heating element coil of a heating element, and FIG. It is another circuit connection diagram of the heating element coil of a heating element. In FIGS. 1 to 3, FIG.
The same members as those described above are denoted by the same reference numerals, and detailed description is omitted.
【００１１】図１及び図２に示すように、グロープラグ
のハウジング１内には、スリーブ２を介して二本の発熱
素子（セラミックス製シース）３ａ，３ｂが、燃料と空
気の流れ方向に沿い所定寸法離して配置されている。As shown in FIGS. 1 and 2, two heating elements (sheaths made of ceramics) 3a, 3b are provided in a housing 1 of a glow plug via a sleeve 2 in a flow direction of fuel and air. They are spaced apart by a predetermined dimension.
【００１２】そして、前記二本の発熱素子３ａ，３ｂの
発熱体コイル４は電源７に対して直列に回路接続（配
線）されて現行１２Ｖ対応のグロープラグで、トラック
・バスの２４Ｖ対応のグロープラグが形成されている
（因みに、一本の発熱素子で２４Ｖ対応のセラミックグ
ロープラグは現時点では存在しない）。勿論、図３に示
すように、前記二本の発熱素子３ａ，３ｂの発熱体コイ
ル４を電源７に対して並列に回路接続（配線）して１２
Ｖ対応のグロープラグを形成することもできる。The heating element coils 4 of the two heating elements 3a, 3b are connected in circuit (wiring) to the power supply 7 in series and are glow plugs compatible with the current 12V, and glow plugs compatible with the track bus of 24V. A plug is formed (by the way, there is no ceramic glow plug corresponding to 24 V with one heating element at present). Of course, as shown in FIG. 3, the heating element coil 4 of the two heating elements 3a and 3b is
A V-compatible glow plug can also be formed.
【００１３】［作用・効果］このように構成されるた
め、二本の発熱素子３ａ，３ｂの各発熱体コイル４にそ
れぞれリード線５ａ，５ｂを介して結線された正，負電
極６ａ，６ｂ間に電源７からの電圧が印加されると、前
記各発熱体コイル４が発熱し、これにより二本の発熱素
子３ａ，３ｂの一部が赤熱して（図中赤熱部参照）発火
点となる。[Operation / Effect] With this configuration, the positive and negative electrodes 6a, 6b connected to the respective heating element coils 4 of the two heating elements 3a, 3b via the lead wires 5a, 5b, respectively. When a voltage is applied from the power supply 7 during this time, each of the heating element coils 4 generates heat, thereby causing a part of the two heating elements 3a and 3b to glow red (see the red-hot area in the figure) and the ignition point. Become.
【００１４】この際、本実施例では、二本の発熱素子３
ａ，３ｂが燃料と空気の流れ方向に沿い所定間隔離間し
て配置されているので、上流側の発熱素子３ａによる燃
料と空気の流れの剥離により下流側の発熱素子３ｂ周り
に後流（カルマン渦）が生起され、この後流の中に前記
赤熱部が位置するため、赤熱部周りの燃料保持性が向上
して着火性が向上する。換言すれば、ディーゼルエンジ
ンの排気ガス等の低酸素濃度のガスでも容易に着火する
ようになる。At this time, in this embodiment, the two heating elements 3
a and 3b are arranged at predetermined intervals along the direction of flow of fuel and air, so that the flow of fuel and air is separated by the upstream heating element 3a, and the wake (Kalman) flows around the heating element 3b on the downstream side. A vortex is generated, and the glowing portion is located in the wake, so that the fuel retention around the glowing portion is improved and the ignitability is improved. In other words, even a gas having a low oxygen concentration such as exhaust gas of a diesel engine can be easily ignited.
【００１５】［第２実施例］ ［構成］図４は本発明の第２実施例を示すグロープラグ
の構造説明図、図５は同じく発熱素子の発熱体コイルの
回路接続図、図６は同じく発熱素子の発熱体コイルの別
の回路接続図である。[Second Embodiment] [Configuration] FIG. 4 is an explanatory view of the structure of a glow plug showing a second embodiment of the present invention, FIG. 5 is a circuit connection diagram of a heating element coil of a heating element, and FIG. It is another circuit connection diagram of the heating element coil of a heating element.
【００１６】これは、第１実施例における二本の発熱素
子３ａ，３ｂを、燃料と空気の流れ方向に沿い隣接させ
ると共に下流側に位置する発熱素子３ｂを所定寸法だけ
引っ込めて段違いに配置した例である。This is because the two heating elements 3a and 3b in the first embodiment are arranged adjacent to each other in the direction of flow of the fuel and air, and the heating element 3b located on the downstream side is retracted by a predetermined dimension and arranged stepwise. It is an example.
【００１７】そして、図５に示すように、前記二本の発
熱素子３ａ，３ｂの発熱体コイル４は電源７に対して直
列に回路接続（配線）されて現行１２Ｖ対応のグロープ
ラグで、トラック・バスの２４Ｖ対応のグロープラグが
形成されている。勿論、図６に示すように、前記二本の
発熱素子３ａ，３ｂの発熱体コイル４を電源７に対して
並列に回路接続（配線）して１２Ｖ対応のグロープラグ
を形成することもできる。更に、図５では、隣接する発
熱素子３ａ，３ｂの正電極６ａと負電極６ｂとを配線を
用いないで直接接続している。また、図６では、隣接す
る発熱素子３ａ，３ｂの正電極６ａ同志を配線を用いな
いで直接接続している。As shown in FIG. 5, the heating element coils 4 of the two heating elements 3a and 3b are connected in circuit (wiring) to a power supply 7 in series, and are glow plugs compatible with the current 12V. -A glow plug corresponding to 24V of the bus is formed. Of course, as shown in FIG. 6, the heating element coil 4 of the two heating elements 3a and 3b can be connected (wired) in parallel with the power supply 7 to form a 12V-compatible glow plug. Further, in FIG. 5, the positive electrode 6a and the negative electrode 6b of the adjacent heating elements 3a, 3b are directly connected without using wiring. In FIG. 6, the positive electrodes 6a of the adjacent heating elements 3a and 3b are directly connected without using wiring.
【００１８】［作用・効果］この実施例では、第１実施
例と同様に下流側の発熱素子３ｂ下方に後流（カルマン
渦）が生起され、この後流の中に前記発熱素子３ｂの赤
熱部が位置するため、赤熱部周りの燃料保持性が向上し
て着火性が向上すると共に、二本の発熱素子３ａ，３ｂ
が隣接するので、グロープラグのコンパクト化が図れ
る。また、第１実施例と比較して配線を一部省略するこ
とができる。[Operation and Effect] In this embodiment, a wake (Kalman vortex) is generated below the downstream heating element 3b, as in the first embodiment, and the red heat of the heating element 3b is generated in the wake. Because of the location of the heating element, the fuel retention around the red-hot area is improved, the ignition performance is improved, and the two heating elements 3a, 3b
Are adjacent to each other, so that the glow plug can be made more compact. In addition, compared to the first embodiment, some wiring can be omitted.
【００１９】尚、本発明は上記各実施例に限定されず、
本発明の要旨を逸脱しない範囲で各種変更が可能である
ことはいうまでもない。The present invention is not limited to the above embodiments,
It goes without saying that various changes can be made without departing from the spirit of the present invention.
【００２０】[0020]
【発明の効果】請求項１の発明によれば、燃焼室に臨設
されるグロープラグの発熱素子を、ガス流れの方向に沿
って二本配置し、上流側の発熱素子で後流を発生させ、
発生した後流の中に下流側の発熱素子を位置させたこと
を特徴とするので、後流発生により赤熱部周りの燃料保
持性が向上して着火性が向上する。According to the first aspect of the present invention, two heating elements of the glow plug provided in the combustion chamber are arranged along the direction of gas flow, and a wake is generated by the upstream heating element. ,
Since the downstream heating element is positioned in the generated wake, the generation of the wake improves the fuel retention around the red hot portion and the ignitability.
【００２１】請求項２の発明によれば、前記ガス流れの
下流側に位置する発熱素子を上流側の発熱素子に接触さ
せると共に所定寸法だけ引っ込めて段違いに配置したこ
とを特徴とするので、請求項１の発明と同様の効果に加
えてグロープラグのコンパクト化が図れると共に配線を
一部省略することができる。According to the second aspect of the present invention, the heating element located on the downstream side of the gas flow is brought into contact with the heating element on the upstream side and is retracted by a predetermined dimension so as to be arranged stepwise. In addition to the same effect as the invention of item 1, the glow plug can be made more compact and the wiring can be partially omitted.
【００２２】請求項３の発明によれば、前記二本の発熱
素子の発熱体コイルを電源に対し直列に接続したことを
特徴とするので、請求項１の発明と同様の効果に加えて
例えば現行１２Ｖ対応のグロープラグで、トラック・バ
スの２４Ｖ対応のグロープラグが形成され、使い勝手が
ある。According to the third aspect of the present invention, the heating element coils of the two heating elements are connected in series to a power supply. With the current 12V compatible glow plug, a 24V compatible glow plug for trucks and buses is formed, which is convenient.
【図１】本発明の第１実施例を示すグロープラグの構造
説明図である。FIG. 1 is a structural explanatory view of a glow plug showing a first embodiment of the present invention.
【図２】同じく発熱素子の発熱体コイルの回路接続図で
ある。FIG. 2 is a circuit connection diagram of a heating element coil of the heating element.
【図３】同じく発熱素子の発熱体コイルの別の回路接続
図である。FIG. 3 is another circuit connection diagram of a heating element coil of the heating element.
【図４】本発明の第２実施例を示すグロープラグの構造
説明図である。FIG. 4 is a structural explanatory view of a glow plug showing a second embodiment of the present invention.
【図５】同じく発熱素子の発熱体コイルの回路接続図で
ある。FIG. 5 is a circuit connection diagram of a heating element coil of the heating element.
【図６】同じく発熱素子の発熱体コイルの別の回路接続
図である。FIG. 6 is another circuit connection diagram of the heating element coil of the heating element.
【図７】従来のグロープラグの構造説明図である。FIG. 7 is a structural explanatory view of a conventional glow plug.
１ ハウジング ２ スリーブ ３ａ，３ｂ 発熱素子 ４ 発熱体コイル ５ａ，５ｂ リード線 ６ａ，６ｂ 正，負電極 DESCRIPTION OF SYMBOLS 1 Housing 2 Sleeve 3a, 3b Heating element 4 Heating element coil 5a, 5b Lead wire 6a, 6b Positive and negative electrodes
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 幸浩 神奈川県相模原市田名3000番地 三菱重 工業株式会社 相模原製作所内 (56)参考文献 特開 平２−242020（ＪＰ，Ａ) 特開 平５−296454（ＪＰ，Ａ) 実開 平１−178461（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23Q 7/00 - 7/26 F02B 23/02 F02B 23/08 F02N 17/047 F02P 19/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiro Abe 3000 Tana, Sagamihara City, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. Sagamihara Works (56) References JP-A-2-242020 (JP, A) JP-A-5 −296454 (JP, A) Hikaru 1-178461 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F23Q 7 /00-7/26 F02B 23/02 F02B 23/08 F02N 17/047 F02P 19/00
Claims (3)
素子を、ガス流れの方向に沿って二本配置し、上流側の
発熱素子で後流を発生させ、発生した後流の中に下流側
の発熱素子を位置させたことを特徴とするグロープラ
グ。The method according to claim 1] heating element of the glow plug to be臨設the combustion chamber, disposed two along the direction of gas flow, the upstream side
A wake is generated by the heating element, and the downstream side is generated in the generated wake.
A glow plug, wherein a heating element is positioned .
子を上流側の発熱素子に接触させると共に所定寸法だけ
引っ込めて段違いに配置したことを特徴とする請求項１
記載のグロープラグ。2. A heating element located on the downstream side of the gas flow is brought into contact with the heating element on the upstream side, and is retracted by a predetermined dimension so as to be arranged stepwise.
The described glow plug.
源に対し直列に接続したことを特徴とする請求項１又は
２記載のグロープラグ。3. The glow plug according to claim 1, wherein the heating element coils of the two heating elements are connected in series to a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10140875A JP3035267B2 (en) | 1998-05-22 | 1998-05-22 | Glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10140875A JP3035267B2 (en) | 1998-05-22 | 1998-05-22 | Glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11337066A JPH11337066A (en) | 1999-12-10 |
| JP3035267B2 true JP3035267B2 (en) | 2000-04-24 |
Family
ID=15278800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10140875A Expired - Fee Related JP3035267B2 (en) | 1998-05-22 | 1998-05-22 | Glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3035267B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010281535A (en) * | 2009-06-08 | 2010-12-16 | Hino Motors Ltd | Discharge ignition device for burner |
| EP2954194A4 (en) * | 2013-02-11 | 2017-06-21 | Contour Hardening, Inc. | Combustion ignition system |
| CN111946524B (en) * | 2019-05-14 | 2022-05-31 | 上海夏雪科技有限公司 | Method and device for controlling internal combustion engine, and computer-readable storage medium |
-
1998
- 1998-05-22 JP JP10140875A patent/JP3035267B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11337066A (en) | 1999-12-10 |
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