JP6756299B2 - Spark plug sleeve - Google Patents

Spark plug sleeve Download PDF

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Publication number
JP6756299B2
JP6756299B2 JP2017085315A JP2017085315A JP6756299B2 JP 6756299 B2 JP6756299 B2 JP 6756299B2 JP 2017085315 A JP2017085315 A JP 2017085315A JP 2017085315 A JP2017085315 A JP 2017085315A JP 6756299 B2 JP6756299 B2 JP 6756299B2
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spark plug
sleeve
plug sleeve
peripheral surface
inner peripheral
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JP2018184839A (en
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義文 長島
義文 長島
公威 小澤
公威 小澤
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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Priority to JP2017085315A priority Critical patent/JP6756299B2/en
Priority to PCT/JP2018/016241 priority patent/WO2018198951A1/en
Priority to CN201880026398.2A priority patent/CN110573724B/en
Publication of JP2018184839A publication Critical patent/JP2018184839A/en
Priority to PH12019502375A priority patent/PH12019502375A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

本発明は、シリンダヘッドとスパークプラグとの間に介在されるスパークプラグスリーブに関する。 The present invention relates to a spark plug sleeve interposed between a cylinder head and a spark plug.

近年は異なる車種間（例えばディーゼル自動車と圧縮天然ガス自動車）に於ける自動車部品の共通化を促進させる事によって自動車の製造に掛かる費用を削減する事が一般的に為されている。 In recent years, it has been generally made to reduce the cost of manufacturing automobiles by promoting the standardization of automobile parts among different vehicle types (for example, diesel automobiles and compressed natural gas automobiles).

具体的に言えば、例えばディーゼルエンジンのシリンダヘッドを圧縮天然ガスエンジンに流用し燃料噴射ノズルに代えスパークプラグを取り付ける事が為されている。 Specifically, for example, the cylinder head of a diesel engine is diverted to a compressed natural gas engine, and a spark plug is attached instead of the fuel injection nozzle.

スパークプラグと燃料噴射ノズルとを比較すると取付構造に差異が有る為、本来は燃料噴射ノズルが取り付けられるディーゼルエンジンのシリンダヘッドにスパークプラグを取り付ける場合は、シリンダヘッドとスパークプラグとの間にスパークプラグスリーブを介在させる事によって取付構造の差異を解消させる必要が有る（例えば特許文献１乃至３を参照）。 When comparing the spark plug and the fuel injection nozzle, there is a difference in the mounting structure, so when mounting the spark plug on the cylinder head of a diesel engine to which the fuel injection nozzle is originally mounted, the spark plug is between the cylinder head and the spark plug. It is necessary to eliminate the difference in the mounting structure by interposing a sleeve (see, for example, Patent Documents 1 to 3).

実開昭６１−１２２３２０号公報Jikkai Sho 61-12320 実開昭５３−５５０３４号公報Jikkai Sho 53-55034 特開２０００−６８０３０号公報Japanese Unexamined Patent Publication No. 2000-68030

然し乍ら、シリンダヘッドにスパークプラグスリーブを介しスパークプラグを取り付ける場合は、スパークプラグスリーブとスパークプラグとを燃焼室内に臨ませる様に取り付ける必要が有る為、スパークプラグスリーブとスパークプラグとが高温環境下に曝露され、スパークプラグスリーブのネジ部が変形する虞が有る。 However, when attaching the spark plug to the cylinder head via the spark plug sleeve, it is necessary to attach the spark plug sleeve and the spark plug so that they face the combustion chamber. Therefore, the spark plug sleeve and the spark plug must be installed in a high temperature environment. When exposed, the threaded portion of the spark plug sleeve may be deformed.

スパークプラグスリーブのネジ部が変形するとスパークプラグを取り外す事が困難に成る為、高温環境下に於いても変形し難いスパークプラグスリーブの提供が望まれている。 Since it becomes difficult to remove the spark plug when the threaded portion of the spark plug sleeve is deformed, it is desired to provide a spark plug sleeve that is not easily deformed even in a high temperature environment.

従って、本発明は、高温環境下に於いてもネジ部が変形し難いスパークプラグスリーブを提供する事を目的とする。 Therefore, an object of the present invention is to provide a spark plug sleeve in which the threaded portion is not easily deformed even in a high temperature environment.

本発明は、シリンダヘッドとスパークプラグとの間に介在されるスパークプラグスリーブであって、前記スパークプラグスリーブの内周面のうち、冷却水が流通されるウォータジャケットに対して前記スパークプラグスリーブの外周面を挟んで隣接する部分に形成され、前記スパークプラグを螺合させる事が出来るスリーブ側内周ネジ部と、前記スパークプラグスリーブの内周面のうち、前記スリーブ側内周ネジ部よりも先端側の燃焼室内に臨む部分に形成され、前記スパークプラグを螺合させる事が出来ない非螺合部と、前記ウォータジャケットに臨む前記スパークプラグスリーブの外周面に形成され、フィン形状の外形を有する放熱部と、を備えるスパークプラグスリーブを提供する。 The present invention is a spark plug sleeve interposed between a cylinder head and a spark plug, and the spark plug sleeve is provided with respect to a water jacket through which cooling water is circulated on the inner peripheral surface of the spark plug sleeve. A sleeve-side inner peripheral threaded portion formed in an adjacent portion across the outer peripheral surface and capable of screwing the spark plug, and an inner peripheral surface of the spark plug sleeve, which is larger than the sleeve-side inner peripheral threaded portion. it is formed in a portion facing the combustion chamber of the distal end side, and a non-threaded portion that can not be screwed to the spark plug, is formed on the outer peripheral surface of the spark plug sleeve facing the water jacket, the outer shape of the fin-shaped Provided is a spark plug sleeve including a heat radiating portion .

本発明によって、高温環境下に於いてもネジ部が変形し難いスパークプラグスリーブを提供する事が出来る。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a spark plug sleeve in which the threaded portion is not easily deformed even in a high temperature environment.

本発明の実施の形態に係るスパークプラグスリーブの断面を示した断面図である。It is sectional drawing which showed the cross section of the spark plug sleeve which concerns on embodiment of this invention. 図１のＡ部を拡大した要部拡大図である。It is an enlarged view of the main part which enlarged the part A of FIG. 本発明の他の実施の形態に係るスパークプラグスリーブの断面を示した断面図である。It is sectional drawing which showed the cross section of the spark plug sleeve which concerns on other embodiment of this invention.

以下、本発明の実施の形態を添付図面に順って説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１及び２に示す様に、本発明の実施の形態に係るスパークプラグスリーブ１００は、例えば本来は燃料噴射ノズルが取り付けられるディーゼルエンジンのシリンダヘッド１０１を圧縮天然ガスエンジンに流用し燃料噴射ノズルに代えスパークプラグ１０２を取り付ける場合にシリンダヘッド１０１とスパークプラグ１０２との間に介在される自動車部品である。 As shown in FIGS. 1 and 2, in the spark plug sleeve 100 according to the embodiment of the present invention, for example, the cylinder head 101 of a diesel engine to which a fuel injection nozzle is originally attached is diverted to a compressed natural gas engine and used as a fuel injection nozzle. It is an automobile part interposed between the cylinder head 101 and the spark plug 102 when the substitute spark plug 102 is attached.

本発明は、シリンダヘッド１０１とスパークプラグ１０２との間にスパークプラグスリーブ１００を介在させる構造を有する限り、ディーゼルエンジンのシリンダヘッド１０１を圧縮天然ガスエンジンに流用し燃料噴射ノズルに代えスパークプラグ１０２を取り付ける態様に限らず、如何なる態様にも適用する事が出来ると共に同様の効果を奏する事が出来る。 In the present invention, as long as the spark plug sleeve 100 is interposed between the cylinder head 101 and the spark plug 102, the cylinder head 101 of the diesel engine is diverted to the compressed natural gas engine and the spark plug 102 is used instead of the fuel injection nozzle. Not limited to the mounting mode, it can be applied to any mode and the same effect can be obtained.

シリンダヘッド１０１は、燃焼室１０３の上部を区画する壁面に形成され、本来は燃料噴射ノズルが取り付けられる取付孔１０４と、冷却水が流通されるウォータジャケット１０５と、を有する。 The cylinder head 101 is formed on a wall surface that partitions the upper part of the combustion chamber 103, and has a mounting hole 104 to which a fuel injection nozzle is originally attached, and a water jacket 105 through which cooling water is circulated.

取付孔１０４は、自身の内周面に形成され、スパークプラグスリーブ１００の先端外周面に形成したスリーブ側外周ネジ部１０６を螺合させる事が出来る孔側ネジ部を有する。 The mounting hole 104 has a hole-side screw portion formed on its own inner peripheral surface and capable of screwing a sleeve-side outer peripheral screw portion 106 formed on the tip outer peripheral surface of the spark plug sleeve 100.

スパークプラグスリーブ１００は自身の先端部が燃焼室１０３に臨む様に取付孔１０４に取り付けられる為、スパークプラグスリーブ１００の先端部は高温環境下に曝露される。 Since the spark plug sleeve 100 is attached to the mounting hole 104 so that its tip portion faces the combustion chamber 103, the tip portion of the spark plug sleeve 100 is exposed to a high temperature environment.

ウォータジャケット１０５は、スパークプラグスリーブ１００の外周面を被覆する様に配置される。従って、スパークプラグスリーブ１００はウォータジャケット１０５に流通される冷却水によって冷却される。 The water jacket 105 is arranged so as to cover the outer peripheral surface of the spark plug sleeve 100. Therefore, the spark plug sleeve 100 is cooled by the cooling water flowing through the water jacket 105.

ウォータジャケット１０５の上部にスパークプラグスリーブ１００が挿通される貫通孔１０７が形成される。貫通孔１０７は、貫通孔１０７にスパークプラグスリーブ１００を挿通した時に環状部材１０８によって封止される。 A through hole 107 through which the spark plug sleeve 100 is inserted is formed in the upper part of the water jacket 105. The through hole 107 is sealed by the annular member 108 when the spark plug sleeve 100 is inserted into the through hole 107.

環状部材１０８は、例えばＯリングによって形成され、スパークプラグスリーブ１００の外周面に形成した凹部１０９に配置される。 The annular member 108 is formed by, for example, an O-ring, and is arranged in a recess 109 formed on the outer peripheral surface of the spark plug sleeve 100.

凹部１０９は、スパークプラグスリーブ１００の外周面の二箇所に形成され、二箇所の凹部１０９の夫々に環状部材１０８が配置される。従って、貫通孔１０７に於ける封止性能を向上させる事が出来る。 The recesses 109 are formed at two locations on the outer peripheral surface of the spark plug sleeve 100, and the annular member 108 is arranged in each of the two recesses 109. Therefore, the sealing performance in the through hole 107 can be improved.

スパークプラグ１０２は、自身の先端外周面に形成され、スパークプラグスリーブ１００の先端内周面に形成したスリーブ側内周ネジ部１１０と螺合するプラグ側ネジ部１１１を有する。 The spark plug 102 has a plug-side screw portion 111 formed on the outer peripheral surface of the tip of the spark plug sleeve 100 and screwed with the sleeve-side inner peripheral screw portion 110 formed on the inner peripheral surface of the tip of the spark plug sleeve 100.

スパークプラグ１０２は、スパークプラグスリーブ１００と同様に自身の先端部が燃焼室１０３に臨む様にスパークプラグスリーブ１００に取り付けられる。 Like the spark plug sleeve 100, the spark plug 102 is attached to the spark plug sleeve 100 so that its tip faces the combustion chamber 103.

尚、スパークプラグ１０２は、スパークプラグスリーブ１００が冷却される事によって間接的に冷却される。 The spark plug 102 is indirectly cooled by cooling the spark plug sleeve 100.

スパークプラグスリーブ１００は、先端部が取付孔１０４に取り付けられる為、ウォータジャケット１０５と先端部とが接触していない。従って、スパークプラグスリーブ１００の先端部に燃焼熱が蓄熱し易い。 Since the tip of the spark plug sleeve 100 is attached to the mounting hole 104, the water jacket 105 and the tip are not in contact with each other. Therefore, combustion heat is likely to be stored in the tip of the spark plug sleeve 100.

スパークプラグスリーブ１００は金属によって構成されているものの、燃焼熱が蓄熱し易いスパークプラグスリーブ１００の先端部にスリーブ側内周ネジ部１１０が形成されていると、スリーブ側内周ネジ部１１０が変形しかじりや焼き付きの原因と成る虞が有る。 Although the spark plug sleeve 100 is made of metal, if the sleeve-side inner peripheral screw portion 110 is formed at the tip of the spark plug sleeve 100 in which combustion heat is easily stored, the sleeve-side inner peripheral screw portion 110 is deformed. There is a risk of causing scuffing and seizure.

従って、スパークプラグスリーブ１００は、燃焼室１０３内に臨む先端内周面に形成され、スパークプラグ１０２を螺合させる事が出来ない非螺合部１１２を備える。 Therefore, the spark plug sleeve 100 includes a non-screwed portion 112 which is formed on the inner peripheral surface of the tip facing the inside of the combustion chamber 103 and in which the spark plug 102 cannot be screwed.

非螺合部１１２は、スリーブ側内周ネジ部１１０よりも先端側（燃焼室１０３に近い側）に配置される。非螺合部１１２を設ける事によって燃焼熱が蓄熱し易いスパークプラグスリーブ１００の先端部にスリーブ側内周ネジ部１１０が形成されない。即ち、スパークプラグ１０２のプラグ側ネジ部１１１が螺合せず嵌挿されるだけの領域が形成され、スリーブ側内周ネジ部１１０が冷却水に近い部分のみに形成される事に成る。 The non-screwed portion 112 is arranged on the tip side (the side closer to the combustion chamber 103) than the sleeve-side inner peripheral threaded portion 110. By providing the non-screwed portion 112, the inner peripheral screw portion 110 on the sleeve side is not formed at the tip portion of the spark plug sleeve 100 in which combustion heat is easily stored. That is, a region is formed in which the plug-side screw portion 111 of the spark plug 102 is not screwed and is inserted, and the sleeve-side inner peripheral screw portion 110 is formed only in the portion close to the cooling water.

従って、高温に成り易いスパークプラグスリーブ１００の最先端部にスリーブ側内周ネジ部１１０が存在せず、スリーブ側内周ネジ部１１０が高温に成り難く変形し難い為、かじりや焼き付きが発生しスパークプラグ１０２を取り外す事が出来なく成る事を抑制する事が出来る。 Therefore, the sleeve-side inner peripheral screw portion 110 does not exist at the most advanced portion of the spark plug sleeve 100, which tends to become hot, and the sleeve-side inner peripheral screw portion 110 is difficult to become hot and deformed, so that galling and seizure occur. It is possible to prevent the spark plug 102 from becoming unable to be removed.

尚、非螺合部１１２を設ける事によってスパークプラグ１０２の最先端部に於いてスパークプラグスリーブ１００への伝熱がし難く成る為、スパークプラグ１０２の信頼性を低下させる要因に成る虞も有る。 By providing the non-screwed portion 112, it becomes difficult to transfer heat to the spark plug sleeve 100 at the most advanced portion of the spark plug 102, which may cause a decrease in the reliability of the spark plug 102. ..

然し乍ら、図３に示す様に、ウォータジャケット１０５に臨む外周面に形成され、フィン形状の外形を有する放熱部１１３を更に備えるスパークプラグスリーブ２００とする事によって、スパークプラグスリーブ２００の最先端部、ひいてはスパークプラグ１０２の最先端部に於ける冷却性能を十分に確保する事が出来る。 However, as shown in FIG. 3, the spark plug sleeve 200 is formed on the outer peripheral surface facing the water jacket 105 and further includes a heat radiating portion 113 having a fin-shaped outer shape, whereby the most advanced portion of the spark plug sleeve 200 is formed. As a result, sufficient cooling performance at the most advanced part of the spark plug 102 can be ensured.

即ち、放熱部１１３を形成する事によってスパークプラグスリーブ２００の外周面の表面積を広くし、ウォータジャケット１０５に流通される冷却水とスパークプラグスリーブ２００との接触面積を増加させ放熱を促進させる事が出来る。 That is, by forming the heat radiating portion 113, the surface area of the outer peripheral surface of the spark plug sleeve 200 is widened, and the contact area between the cooling water flowing through the water jacket 105 and the spark plug sleeve 200 is increased to promote heat dissipation. You can.

よって、スパークプラグスリーブ２００とスパークプラグ１０２の最先端部に於いて燃焼熱を効率的にウォータジャケット１０５に逃がす事が出来る為、スパークプラグ１０２の信頼性を確保する事も出来る。 Therefore, the heat of combustion can be efficiently released to the water jacket 105 at the most advanced portions of the spark plug sleeve 200 and the spark plug 102, so that the reliability of the spark plug 102 can be ensured.

以上に説明した様に、本発明によって、高温環境下に於いてもスリーブ側内周ネジ部１１０が変形し難いスパークプラグスリーブ１００及び２００を提供する事が出来る。 As described above, according to the present invention, it is possible to provide the spark plug sleeves 100 and 200 in which the inner peripheral screw portion 110 on the sleeve side is not easily deformed even in a high temperature environment.

１００ スパークプラグスリーブ
１０１ シリンダヘッド
１０２ スパークプラグ
１０３ 燃焼室
１０４ 取付孔
１０５ ウォータジャケット
１０６ スリーブ側外周ネジ部
１０７ 貫通孔
１０８ 環状部材
１０９ 凹部
１１０ スリーブ側内周ネジ部
１１１ プラグ側ネジ部
１１２ 非螺合部
１１３ 放熱部
２００ スパークプラグスリーブ 100 Spark plug sleeve 101 Cylinder head 102 Spark plug 103 Combustion chamber 104 Mounting hole 105 Water jacket 106 Sleeve side outer peripheral threaded part 107 Through hole 108 Circular member 109 Recessed part 110 Sleeve side inner peripheral threaded part 111 Plug side threaded part 112 Non-screwed part 113 Heat dissipation part 200 Spark plug sleeve

Claims (1)

シリンダヘッドとスパークプラグとの間に介在されるスパークプラグスリーブであって、
前記スパークプラグスリーブの内周面のうち、冷却水が流通されるウォータジャケットに対して前記スパークプラグスリーブの外周面を挟んで隣接する部分に形成され、前記スパークプラグを螺合させる事が出来るスリーブ側内周ネジ部と、
前記スパークプラグスリーブの内周面のうち、前記スリーブ側内周ネジ部よりも先端側の燃焼室内に臨む部分に形成され、前記スパークプラグを螺合させる事が出来ない非螺合部と、
前記ウォータジャケットに臨む前記スパークプラグスリーブの外周面に形成され、フィン形状の外形を有する放熱部と、
を備える
事を特徴とするスパークプラグスリーブ。 A spark plug sleeve that is interposed between the cylinder head and the spark plug.
A sleeve formed on the inner peripheral surface of the spark plug sleeve adjacent to the water jacket through which the cooling water flows with the outer peripheral surface of the spark plug sleeve sandwiched, and the spark plug can be screwed into the inner peripheral surface. Side inner circumference screw part and
Of the inner peripheral surface of the spark plug sleeve, a non-screwed portion formed on a portion facing the combustion chamber on the tip side of the inner peripheral screw portion on the sleeve side, and the spark plug cannot be screwed .
A heat radiating portion formed on the outer peripheral surface of the spark plug sleeve facing the water jacket and having a fin-shaped outer shape,
A spark plug sleeve that is characterized by having.
JP2017085315A 2017-04-24 2017-04-24 Spark plug sleeve Active JP6756299B2 (en)

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Application Number Priority Date Filing Date Title
JP2017085315A JP6756299B2 (en) 2017-04-24 2017-04-24 Spark plug sleeve
PCT/JP2018/016241 WO2018198951A1 (en) 2017-04-24 2018-04-20 Spark plug sleeve
CN201880026398.2A CN110573724B (en) 2017-04-24 2018-04-20 Spark plug sleeve
PH12019502375A PH12019502375A1 (en) 2017-04-24 2019-10-18 Spark plug sleeve

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JP6756299B2 true JP6756299B2 (en) 2020-09-16

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JP6909717B2 (en) * 2017-12-12 2021-07-28 三菱重工エンジン＆ターボチャージャ株式会社 Ignition system for internal combustion engine
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WO2018198951A1 (en) 2018-11-01

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