JPH08246994A - Structure of injection nozzl gasket - Google Patents
Structure of injection nozzl gasketInfo
- Publication number
- JPH08246994A JPH08246994A JP4519095A JP4519095A JPH08246994A JP H08246994 A JPH08246994 A JP H08246994A JP 4519095 A JP4519095 A JP 4519095A JP 4519095 A JP4519095 A JP 4519095A JP H08246994 A JPH08246994 A JP H08246994A
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- injection nozzle
- taper surface
- cylinder head
- taper
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ディーゼルエンジン用
の噴射ノズルガスケットの構造に関する。FIELD OF THE INVENTION This invention relates to the construction of injection nozzle gaskets for diesel engines.
【０００２】[0002]
【従来の技術】図５及び図６に示す従来の噴射ノズルガ
スケット６は、逆裁頭円錐形に形成され、図７に示すよ
うにシリンダヘッド１の噴射ノズル孔１ａのテーパ面１
ｂに挿入されて噴射ノズル２のリテーニングナット３の
テーパ面３ａで押着され、燃焼ガスをシールする構造と
なっている。しかし、シリンダヘッド１の噴射ノズル孔
１ａに対し、本来、同芯で挿入される噴射ノズル２が、
傾いて取付けられたり、また、エンジン運転中に振動等
の外力を受けて噴射ノズル孔１ａとのガタにより傾いた
りすると、接触面の面圧を保持できず、ガスケット６部
から燃焼ガスが洩れることがあった。2. Description of the Related Art A conventional injection nozzle gasket 6 shown in FIGS. 5 and 6 is formed in an inverted truncated cone shape and, as shown in FIG. 7, a tapered surface 1 of an injection nozzle hole 1a of a cylinder head 1.
It is inserted in b and is pressed by the tapered surface 3a of the retaining nut 3 of the injection nozzle 2 to seal the combustion gas. However, the injection nozzle 2 which is originally concentrically inserted into the injection nozzle hole 1a of the cylinder head 1 is
If it is installed at an angle, or if it is tilted due to backlash with the injection nozzle hole 1a due to external force such as vibration during engine operation, the surface pressure of the contact surface cannot be maintained and combustion gas may leak from the gasket 6 part. was there.
【０００３】なお、噴射ノズルとシリンダヘッドとの間
に圧入され、ノズルからヘッド側への放熱を改善する考
案として、実開平２−１１４７６７号公報が知られてい
る。As a device for press-fitting between the injection nozzle and the cylinder head to improve heat radiation from the nozzle to the head side, Japanese Utility Model Laid-Open No. 2-114767 is known.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、特に、近来
エンジンの高出力化に伴って燃焼ガスの高圧、高温化に
より噴射ノズルガスケットの負荷が厳しくなっており、
これに対応して噴射ノズル取付時に仮に傾いて取り付け
ても、また、エンジン運転中に振動等の外力を受けて
も、燃焼ガスを完全にシールするノズルガスケットの構
造を提供することを目的としている。According to the present invention, the load on the injection nozzle gasket becomes severe due to the high pressure and high temperature of the combustion gas, especially with the recent high output of the engine.
Correspondingly, it is an object of the present invention to provide a structure of a nozzle gasket that completely seals combustion gas even if the injection nozzle is installed at an angle when it is installed, or if external force such as vibration is received during engine operation. .
【０００５】[0005]
【課題を解決するための手段】本発明は、噴射ノズルを
シリンダヘッドに設けられた噴射ノズル孔に挿入する際
に噴射ノズル孔のテーパ面と噴射ノズルのリテーニング
ナットのテーパ面との間をシールするための噴射ノズル
ガスケットの構造において、前記テーパ面と対応するテ
ーパを有する逆裁頭円錐形に形成され、中間に半径方向
内方に向うリング状の突部が形成されている。According to the present invention, when an injection nozzle is inserted into an injection nozzle hole provided in a cylinder head, a taper surface of the injection nozzle hole and a taper surface of a retaining nut of the injection nozzle are provided. In the structure of the injection nozzle gasket for sealing, it is formed in a truncated conical shape having a taper corresponding to the above-mentioned tapered surface, and a ring-shaped projection portion directed inward in the radial direction is formed in the middle.
【０００６】[0006]
【作用】上記のように構成された噴射ノズルガスケット
によれば、ガスケットと噴射ノズルのリテーニングナッ
トとの接触面は円形状の線接触となり、仮に傾いて取付
けられても突部の弾性変形により高接触面圧が保持され
て燃焼ガスを完全にシールすることができる。According to the injection nozzle gasket configured as described above, the contact surface between the gasket and the retaining nut of the injection nozzle has a circular line contact, and even if it is attached at an angle, the protrusion deforms elastically. The high contact surface pressure is maintained and the combustion gas can be completely sealed.
【０００７】[0007]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１及び図２に本発明のガスケット４の構
造が示されている。中心線に対する外側のテーパ面４ｂ
はシリンダヘッド１の噴射ノズル孔１ａのテーパ面１ｂ
と対応して逆裁頭円錐形に形成されている。そして、そ
の中間部には中心線に向って突出したシールドビード４
ａが形成されている。1 and 2 show the structure of the gasket 4 of the present invention. Outer taper surface 4b with respect to the center line
Is the taper surface 1b of the injection nozzle hole 1a of the cylinder head 1.
Corresponding to, it is formed into a truncated cone shape. The shield bead 4 protruding toward the center line is provided in the middle portion.
a is formed.
【０００９】このガスケットの挿入状態が図３及び図４
に示されている。シリンダヘッド１の噴射ノズル孔１ａ
のテーパ面１ｂにガスケット４が挿入され（図３）、噴
射ノズル２は図示しないねじでシリンダヘッド１に螺着
され、そのリテーニングナット３のテーパ面３ａがガス
ケット４のシールビード４ａを押しつぶすようにして取
付けられる（図４）。したがって、リテーニングナット
３とガスケット４との接触は、円錐状のテーパ面とドー
ナツ状の内径面との円形状の線接触から、シールビード
４ａ部の弾性変形により幾らか幅をもった高面圧の接触
となり、高いシール効果が得られる。しかも噴射ノズル
２の傾きに対してもシールビード４ａ部が弾性変形して
追従し、燃焼ガスの洩れを防止することができる。The state of insertion of this gasket is shown in FIGS.
Is shown in. Injection nozzle hole 1a of cylinder head 1
The gasket 4 is inserted into the tapered surface 1b of FIG. 3 (FIG. 3), the injection nozzle 2 is screwed to the cylinder head 1 with a screw (not shown), and the tapered surface 3a of the retaining nut 3 crushes the seal bead 4a of the gasket 4. And attached (Fig. 4). Therefore, the contact between the retaining nut 3 and the gasket 4 is from a circular line contact between the conical tapered surface and the donut-shaped inner diameter surface to a high surface having a certain width due to elastic deformation of the seal bead 4a. A pressure contact results in a high sealing effect. Moreover, the seal bead 4a is elastically deformed and follows the inclination of the injection nozzle 2, and the leakage of combustion gas can be prevented.
【００１０】なお、ガスケット４には、真鍮、銅、鋼、
アルミニウム等の高弾性で熱伝導のよい材質が適してい
る。The gasket 4 is made of brass, copper, steel,
A material such as aluminum having high elasticity and good heat conduction is suitable.
【００１１】[0011]
【発明の効果】以上説明したように本発明によれば、噴
射ノズルをシリンダヘッドに取付ける際に傾いた取付け
られても、また、エンジン運転中に振動等の外力を受け
て噴射ノズルが噴射ノズル孔のガタにより傾いてもガス
ケットのシールビード部が弾性変形して追従し、燃焼ガ
スに対する高いシール特性を得ることができる。As described above, according to the present invention, even when the injection nozzle is mounted on the cylinder head in a tilted manner, the injection nozzle receives the external force such as vibration during engine operation, Even if it tilts due to the looseness of the holes, the seal bead portion of the gasket elastically deforms and follows, and high sealing characteristics against combustion gas can be obtained.
【図１】本発明の一実施例を示す上面図。FIG. 1 is a top view showing an embodiment of the present invention.
【図２】図１の側断面図。FIG. 2 is a side sectional view of FIG.
【図３】図１のガスケットを噴射ノズル孔に挿入した状
態を示す断面図。FIG. 3 is a sectional view showing a state where the gasket of FIG. 1 is inserted into an injection nozzle hole.
【図４】図３の噴射ノズル取付状態を示す断面図。FIG. 4 is a cross-sectional view showing a state where the injection nozzle of FIG. 3 is attached.
【図５】従来のガスケットを示す上面図。FIG. 5 is a top view showing a conventional gasket.
【図６】図５の側断面図。6 is a side sectional view of FIG.
【図７】図５のガスケットを噴射ノズル孔に挿入した状
態を示す断面図。7 is a cross-sectional view showing a state where the gasket of FIG. 5 is inserted into an injection nozzle hole.
１・・・シリンダヘッド １ａ・・・噴射ノズル孔 １ｂ・・・テーパ面 ２・・・噴射ノズル ３・・・リテーニングナット ３ａ・・・テーパ面 ４・・・ガスケット ４ａ・・・シールビード ４ｂ・・・テーパ面 ６・・・ガスケット DESCRIPTION OF SYMBOLS 1 ... Cylinder head 1a ... Injection nozzle hole 1b ... Tapered surface 2 ... Injection nozzle 3 ... Retaining nut 3a ... Tapered surface 4 ... Gasket 4a ... Seal bead 4b ... Tapered surface 6 ... Gasket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 仁平 幸和 埼玉県比企郡川島町八幡６−12 東京ガス ケット工業株式会社内 (72)発明者 柴田 幸雄 埼玉県比企郡川島町八幡６−12 東京ガス ケット工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kohei Nihira 6-12, Hachiman, Kawashima-cho, Hiki-gun, Saitama Tokyo Gasket Industry Co., Ltd. (72) Yukio Shibata 6-12, Hachiman, Kawashima-cho, Hiki-gun, Saitama Tokyo Gas Ket Industry Co., Ltd.
Claims (1)
た噴射ノズル孔に挿入する際に噴射ノズル孔のテーパ面
と噴射ノズルのリテーニングナットのテーパ面との間を
シールするための噴射ノズルガスケットの構造におい
て、前記テーパ面と対応するテーパを有する逆裁頭円錐
形に形成され、中間に半径方向内方に向うリング状の突
部が形成されていることを特徴とする噴射ノズルガスケ
ットの構造。1. A jet nozzle gasket for sealing between a taper surface of the jet nozzle hole and a taper surface of a retaining nut of the jet nozzle when the jet nozzle is inserted into the jet nozzle hole provided in the cylinder head. In the structure, a structure of an injection nozzle gasket is characterized in that the structure is formed into a truncated conical shape having a taper corresponding to the taper surface, and a ring-shaped projection that faces inward in a radial direction is formed in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4519095A JPH08246994A (en) | 1995-03-06 | 1995-03-06 | Structure of injection nozzl gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4519095A JPH08246994A (en) | 1995-03-06 | 1995-03-06 | Structure of injection nozzl gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08246994A true JPH08246994A (en) | 1996-09-24 |
Family
ID=12712355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4519095A Pending JPH08246994A (en) | 1995-03-06 | 1995-03-06 | Structure of injection nozzl gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08246994A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005050004A1 (en) * | 2003-11-21 | 2005-06-02 | Robert Bosch Gmbh | Fuel injection valve |
| WO2006087186A1 (en) * | 2005-02-15 | 2006-08-24 | Siemens Ag | Sealing device for a fuel injector, and sealing method |
| JP2010185323A (en) * | 2009-02-11 | 2010-08-26 | Denso Corp | Mounting structure for fuel injection valve and washer of fuel injection valve used therefor |
| WO2011121728A1 (en) * | 2010-03-30 | 2011-10-06 | トヨタ自動車 株式会社 | Vibration insulator for fuel injection valve, and support structure for fuel injection valve |
| US8978624B2 (en) | 2010-07-30 | 2015-03-17 | Toyota Jidosha Kabushiki Kaisha | Vibration damping insulator for fuel injection valve |
| CN105089846A (en) * | 2014-05-05 | 2015-11-25 | 易安迪机车公司 | Sealing body for isolating vibrations from cylinder body to nozzle |
| JP2018527534A (en) * | 2015-07-22 | 2018-09-20 | ハンショー コンポジッツ, リミテッド ライアビリティー カンパニーHansho Composites, Llc | Bidirectional sealing system for plastic lining high pressure gas cylinder outlet |
-
1995
- 1995-03-06 JP JP4519095A patent/JPH08246994A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005050004A1 (en) * | 2003-11-21 | 2005-06-02 | Robert Bosch Gmbh | Fuel injection valve |
| DE10354465B4 (en) * | 2003-11-21 | 2014-07-17 | Robert Bosch Gmbh | Fuel injector |
| US7559312B2 (en) | 2005-02-15 | 2009-07-14 | Siemens Aktiengesellschaft | Sealing device for a fuel injector, and sealing method |
| JP2008530427A (en) * | 2005-02-15 | 2008-08-07 | シーメンス アクチエンゲゼルシャフト | Sealing device and sealing method for fuel injector |
| JP4664990B2 (en) * | 2005-02-15 | 2011-04-06 | シーメンス アクチエンゲゼルシャフト | Sealing device and sealing method for fuel injector |
| WO2006087186A1 (en) * | 2005-02-15 | 2006-08-24 | Siemens Ag | Sealing device for a fuel injector, and sealing method |
| JP2010185323A (en) * | 2009-02-11 | 2010-08-26 | Denso Corp | Mounting structure for fuel injection valve and washer of fuel injection valve used therefor |
| WO2011121728A1 (en) * | 2010-03-30 | 2011-10-06 | トヨタ自動車 株式会社 | Vibration insulator for fuel injection valve, and support structure for fuel injection valve |
| JP5320504B2 (en) * | 2010-03-30 | 2013-10-23 | トヨタ自動車株式会社 | Damping insulator for fuel injection valve and support structure for fuel injection valve |
| US8763588B2 (en) | 2010-03-30 | 2014-07-01 | Toyota Jidosha Kabushiki Kaisha | Vibration insulator for fuel injection valve, and support structure for fuel injection valve |
| DE112010005428B4 (en) * | 2010-03-30 | 2017-08-17 | Toyota Jidosha Kabushiki Kaisha | Vibration isolator for a fuel injection valve and a support structure for a fuel injection valve |
| US8978624B2 (en) | 2010-07-30 | 2015-03-17 | Toyota Jidosha Kabushiki Kaisha | Vibration damping insulator for fuel injection valve |
| CN105089846A (en) * | 2014-05-05 | 2015-11-25 | 易安迪机车公司 | Sealing body for isolating vibrations from cylinder body to nozzle |
| JP2018527534A (en) * | 2015-07-22 | 2018-09-20 | ハンショー コンポジッツ, リミテッド ライアビリティー カンパニーHansho Composites, Llc | Bidirectional sealing system for plastic lining high pressure gas cylinder outlet |
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