JPH0849640A - Ignition coil attaching device in internal combustion engine - Google Patents

Ignition coil attaching device in internal combustion engine

Info

Publication number
JPH0849640A
JPH0849640A JP18235994A JP18235994A JPH0849640A JP H0849640 A JPH0849640 A JP H0849640A JP 18235994 A JP18235994 A JP 18235994A JP 18235994 A JP18235994 A JP 18235994A JP H0849640 A JPH0849640 A JP H0849640A
Authority
JP
Japan
Prior art keywords
ignition coil
coil case
cylinder head
hole
plug
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.)
Granted
Application number
JP18235994A
Other languages
Japanese (ja)
Other versions
JP3140637B2 (en
Inventor
Hajime Fujita
一 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP06182359A priority Critical patent/JP3140637B2/en
Publication of JPH0849640A publication Critical patent/JPH0849640A/en
Application granted granted Critical
Publication of JP3140637B2 publication Critical patent/JP3140637B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

PURPOSE:To ventilate the inside of a plug cover pipe in a state where the invasion of water is decreased without deteriorating formability of an ignition coil case, in an attaching device formed by attaching the synthetic resin-made ignition coil case housing the ignition coil to a seal body fitted on the upper end of the plug cover pipe for an ignition plug screwed to a cylinder head. CONSTITUTION:An air vent passage 10 to the inside of a plug cover pipe is constituted on an ignition coil case 7 by a longitudinal hole 10a formed from the lower surface 7a of the ignition coil case so as to be approximately perpendicular to it and a horizontal hole 10b horizontally formed from the side surface 7b of the ignition coil case so as to be communicated with the longitudinal hole.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、内燃機関におけるシリ
ンダヘッドカバーの上面に、各気筒の各々に対する点火
コイルを取付けるための装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting an ignition coil for each cylinder on the upper surface of a cylinder head cover in an internal combustion engine.

【0002】[0002]

【従来の技術】最近の内燃機関においては、例えば、実
開平4−66357号公報等に記載されているように、
そのシリンダヘッドカバーの上面に、各気筒の各々に対
する点火コイルを取付けることが行われている。すなわ
ち、シリンダヘッドに螺着した点火栓に対するプラグカ
バー管が、シリンダヘッドカバーを貫通して開口する部
分に、軟質弾性体製のシール体を、当該シール体にて前
記プラグカバー管の開口部及びシリンダヘッドカバーの
貫通孔を塞ぐように嵌着して、このシール体に、点火コ
イルを内蔵した合成樹脂製の点火コイルケースを取付け
る一方、前記プラグカバー管内に、前記点火コイルと点
火栓とを電気的に接続するための接続体を設けると言う
構成にしている。
2. Description of the Related Art In recent internal combustion engines, as disclosed in, for example, Japanese Utility Model Publication No. 4-66357,
An ignition coil for each cylinder is attached to the upper surface of the cylinder head cover. That is, a seal body made of a soft elastic body is provided at a portion where the plug cover tube for the spark plug screwed to the cylinder head penetrates and opens the cylinder head cover. The head cover is fitted so as to close the through hole, and the seal body is fitted with an ignition coil case made of a synthetic resin containing an ignition coil, while the plug cover tube is electrically connected to the ignition coil and the ignition plug. The structure is such that a connecting body for connecting to is provided.

【0003】ところで、この種の装置において、前記プ
ラグカバー管の内部は、密閉された状態になることによ
り、当該プラグカバー管の内部を適宜換気を行うことが
必要であって、従来の装置においては、前記シール体の
上面と、これに接当する点火コイルケースの下面との間
に、前記プラグカバー管内に連通する換気用の空気抜き
孔を設けている。
By the way, in this type of device, since the inside of the plug cover tube is in a sealed state, it is necessary to appropriately ventilate the inside of the plug cover tube. Has an air vent hole for ventilation that communicates with the inside of the plug cover tube between the upper surface of the seal body and the lower surface of the ignition coil case that abuts against the seal body.

【0004】[0004]

【発明が解決しようとする課題】しかし、このようにシ
ール体の上面と、これに接当する点火コイルケースの下
面との間に、前記プラグカバー管内に連通する換気用の
空気抜き通路を設けると言う構成にした場合、この空気
抜き通路は、シリンダヘッドカバーの上面に近接した部
位に位置しているから、シリンダヘッドカバーの上面
に、水が被ったときにおいて、水が、前記空気抜き通路
を通って、プラグカバー管内に侵入して、点火栓に失火
が発生すると言う問題があった。
However, if an air vent passage for ventilation that communicates with the inside of the plug cover tube is provided between the upper surface of the seal body and the lower surface of the ignition coil case that abuts against the seal body as described above. In the case of such a configuration, since the air vent passage is located at a portion close to the upper surface of the cylinder head cover, when the upper surface of the cylinder head cover is covered with water, the water passes through the air vent passage and the plug is discharged. There is a problem that the spark plug may enter the cover tube and cause misfire.

【0005】本発明は、この問題を、合成樹脂製点火コ
イルケースの成形性を損なうことなく、解消した点火コ
イルの取付け装置を提供することを技術的課題とするも
のである。
An object of the present invention is to provide an ignition coil mounting apparatus which solves this problem without impairing the moldability of the synthetic resin ignition coil case.

【0006】[0006]

【課題を解決するための手段】この技術的課題を達成す
るため本発明は、「シリンダヘッドに螺着した点火栓に
対するプラグカバー管が、シリンダヘッドカバーを貫通
して開口する部分に、軟質弾性体製のシール体を、当該
シール体にて前記プラグカバー管の開口部及びシリンダ
ヘッドカバーの貫通孔を塞ぐように嵌着して、このシー
ル体に、点火コイルを内蔵した合成樹脂製の点火コイル
ケースを取付けて成る取付け装置において、前記プラグ
カバー管内に対する空気抜き通路を、前記点火コイルケ
ースに、当該点火コイルケースの下面からこれと略直角
に穿設した縦向き孔と、点火コイルケースの側面から前
記縦向き孔に連通するように横向きに穿設した横向き孔
とで構成する。」ことにした。
In order to achieve this technical object, the present invention provides a "soft elastic body at a portion where a plug cover tube for an ignition plug screwed to a cylinder head is opened through a cylinder head cover. A sealing body made of synthetic resin is fitted so as to close the opening of the plug cover tube and the through hole of the cylinder head cover with the sealing body, and the sealing body is made of synthetic resin and has an ignition coil. In the mounting device, the air vent passage to the inside of the plug cover tube is provided in the ignition coil case from the lower surface of the ignition coil case at a right angle to the vertical direction, and from the side surface of the ignition coil case. It is composed of a horizontal hole that is formed laterally so as to communicate with the vertical hole. "

【0007】[0007]

【発明の作用・効果】プラグカバー管内に対する空気抜
き通路を、前記のように、点火コイルケースに、当該点
火コイルケースの下面からこれと略直角に穿設した縦向
き孔と、点火コイルケースの側面から前記縦向き孔に連
通するように横向きに穿設した横向き孔とで構成するこ
とにより、この空気抜き通路の大気への開口部である横
向き孔は、シール体の上面よりも高い部位に位置するこ
とになり、換言すると、シリンダヘッドカバーの上面よ
りも高い部位に位置することになるから、シリンダヘッ
ドカバーに被った水が、前記空気抜き通路より侵入する
ことを確実に低減できるのである。
As described above, the air vent passage to the inside of the plug cover tube is formed in the ignition coil case from the lower surface of the ignition coil case at a right angle to the vertical direction, and the side surface of the ignition coil case. To the above-mentioned vertical hole, the horizontal hole is formed in the horizontal direction so as to communicate with the above-mentioned vertical hole, so that the horizontal hole, which is the opening of the air vent passage to the atmosphere, is located at a position higher than the upper surface of the seal body. In other words, in other words, since it is located at a position higher than the upper surface of the cylinder head cover, it is possible to reliably reduce the invasion of the water covered by the cylinder head cover from the air vent passage.

【0008】また、前記空気抜き通路のうち縦向き孔
は、点火コイルケースを合成樹脂にて成形するときにお
いて、その下面側を成形する成形型の型抜き方向に延び
ている一方、前記空気抜き通路のうち横向き孔は、点火
コイルケースを合成樹脂にて成形するときにおいて、そ
の側面側を成形する成形型の型抜き方向に延びているこ
とにより、これら縦向き孔及び横向き孔は、点火コイル
ケースを合成樹脂にて成形するときに同時に形成するこ
とができるから、点火コイルケースに空気抜き通路を形
成することによる成形の困難性を招来することを回避で
きるのである。
In the air vent passage, the longitudinal hole extends in the die removing direction of the molding die for molding the lower surface side of the ignition coil case when the ignition coil case is made of synthetic resin. When the ignition coil case is molded with synthetic resin, the lateral holes extend in the die cutting direction of the molding die that molds the side surface of the ignition coil case. Since it can be formed at the same time when the synthetic resin is molded, it is possible to avoid the difficulty of the molding due to the formation of the air vent passage in the ignition coil case.

【0009】[0009]

【実施例】以下、本発明の実施例を、図1の図面につい
て説明する。この図において符号1は、シリンダヘッド
を示し、このシリンダヘッド1の上面には、当該シリン
ダヘッド1に螺着した点火栓2に対するプラグカバー管
3が、上向きに延びるように固着されており、このプラ
グカバー管3の上端は、前記シリンダヘッド1の上面を
覆うシリンダヘッドカバー4に穿設した貫通孔5からそ
の上面に開口している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawing of FIG. In the figure, reference numeral 1 denotes a cylinder head, and a plug cover tube 3 for an ignition plug 2 screwed to the cylinder head 1 is fixed to the upper surface of the cylinder head 1 so as to extend upward. The upper end of the plug cover tube 3 is opened from the through hole 5 formed in the cylinder head cover 4 covering the upper surface of the cylinder head 1 to the upper surface thereof.

【0010】符号6は、前記プラグカバー管3の上端内
に、当プラグカバー管3の開口部及びシリンダヘッドカ
バー4の貫通孔5を塞ぐように嵌着した軟質弾性体製の
シール体を示し、このシール体6の上面には、点火コイ
ルを内蔵した合成樹脂製の点火コイルケース7が、当該
点火コイルケース7の下面7aが前記シール体6の上面
6aに密接するように取付けられており、更に、前記プ
ラグカバー管3の内部には、前記点火コイルケース7内
の点火コイルと前記点火栓2とを電気的に接続するため
の接続体8が設けられている。
Reference numeral 6 denotes a seal body made of a soft elastic body fitted in the upper end of the plug cover tube 3 so as to close the opening of the plug cover tube 3 and the through hole 5 of the cylinder head cover 4. On the upper surface of the seal body 6, an ignition coil case 7 made of synthetic resin having an ignition coil built therein is attached so that the lower surface 7a of the ignition coil case 7 is in close contact with the upper surface 6a of the seal body 6. Further, inside the plug cover tube 3, there is provided a connecting body 8 for electrically connecting the ignition coil in the ignition coil case 7 and the ignition plug 2.

【0011】そして、前記点火コイルケース7の内部
に、前記プラグカバー管3内を前記シール体6に穿設し
た小孔9を介して大気に連通するための空気抜き通路1
0を穿設するにおいて、この空気抜き通路10を、前記
点火コイルケース7に、当該点火コイルケース7の下面
7aからこれと略直角に穿設した縦向き孔10aと、点
火コイルケース7の側面7bから前記縦向き孔10aに
連通するように横向きに穿設した横向き孔10bとで構
成する。
An air vent passage 1 is provided inside the ignition coil case 7 for communicating the inside of the plug cover tube 3 with the atmosphere through a small hole 9 formed in the seal body 6.
In the case of drilling 0, the air vent passage 10 is formed in the ignition coil case 7 from the lower surface 7a of the ignition coil case 7 at a right angle to the vertical hole 10a and the side surface 7b of the ignition coil case 7. And a horizontal hole 10b which is formed laterally so as to communicate with the vertical hole 10a.

【0012】プラグカバー管3内に対する空気抜き通路
10を、前記のように、点火コイルケース7に、当該点
火コイルケース7の下面7aからこれと略直角に穿設し
た縦向き孔10aと、点火コイルケース7の側面7bか
ら前記縦向き孔10aに連通するように横向きに穿設し
た横向き孔10bとで構成することにより、この空気抜
き通路10の大気への開口部である横向き孔10bは、
シール体6の上面6aよりも高い部位に位置することに
なるから、シリンダヘッドカバー4に被った水が、前記
空気抜き通路10より侵入することを確実に低減できる
のである。
As described above, the air vent passage 10 to the inside of the plug cover tube 3 is formed in the ignition coil case 7 from the lower surface 7a of the ignition coil case 7 in the vertical direction 10a and the ignition hole 10a. The sideways hole 10b, which is an opening portion of the air vent passage 10 to the atmosphere, is configured by a sideways hole 10b that is formed in a sideways manner so as to communicate with the sideways 7b of the case 7 to the vertically oriented hole 10a.
Since it is located at a position higher than the upper surface 6a of the seal body 6, it is possible to reliably reduce the water covered on the cylinder head cover 4 from entering through the air vent passage 10.

【0013】また、前記空気抜き通路10のうち縦向き
孔10aは、点火コイルケース7を合成樹脂にて成形す
るときにおいて、その下面7a側を成形する成形型の型
抜き方向に延びている一方、前記空気抜き通路10のう
ち横向き孔10bは、点火コイルケース7を合成樹脂に
て成形するときにおいて、その側面7b側を成形する成
形型の型抜き方向に延びていることにより、これら縦向
き孔10a及び横向き孔10bは、点火コイルケース7
を合成樹脂にて成形するときに同時に形成することがで
き、点火コイルケース7に空気抜き通路10を形成する
ことによる成形の困難性を招来することを回避できるの
である。
The longitudinal hole 10a of the air vent passage 10 extends in the die removing direction of the die for molding the lower surface 7a side when the ignition coil case 7 is made of synthetic resin. The lateral holes 10b in the air vent passage 10 extend in the die-releasing direction of the molding die for molding the side surface 7b when the ignition coil case 7 is molded with synthetic resin. And the lateral holes 10b are provided in the ignition coil case 7
Can be formed at the same time as molding with synthetic resin, and it is possible to avoid the difficulty of molding due to the formation of the air vent passage 10 in the ignition coil case 7.

【0014】なお、前記点火コイルケース7の側面に、
ボス部11を一体的に突出して、このボス部11から前
記横向き孔10bを穿設するように構成することによ
り、空気抜き通路10内への水の侵入を、更に効果的に
防止することができるのである。
On the side surface of the ignition coil case 7,
Since the boss 11 is integrally projected and the lateral hole 10b is formed from the boss 11, it is possible to more effectively prevent water from entering the air vent passage 10. Of.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す縦断正面図である。FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 シリンダヘッド 2 点火栓 3 プラグカバー管 4 シリンダヘッドカバー 5 貫通孔 6 シール体 7 点火コイルケース 7a 点火コイルケースの下面 7b 点火コイルケースの側面 10 空気抜き孔 10a 縦向き孔 10b 横向き孔 1 Cylinder Head 2 Spark Plug 3 Plug Cover Tube 4 Cylinder Head Cover 5 Through Hole 6 Sealing Body 7 Ignition Coil Case 7a Ignition Coil Case Bottom 7b Ignition Coil Case Side 10 Air Venting Hole 10a Vertical Hole 10b Horizontal Hole

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】シリンダヘッドに螺着した点火栓に対する
プラグカバー管が、シリンダヘッドカバーを貫通して開
口する部分に、軟質弾性体製のシール体を、当該シール
体にて前記プラグカバー管の開口部及びシリンダヘッド
カバーの貫通孔を塞ぐように嵌着して、このシール体
に、点火コイルを内蔵した合成樹脂製の点火コイルケー
スを取付けて成る取付け装置において、前記プラグカバ
ー管内に対する空気抜き通路を、前記点火コイルケース
に、当該点火コイルケースの下面からこれと略直角に穿
設した縦向き孔と、点火コイルケースの側面から前記縦
向き孔に連通するように横向きに穿設した横向き孔とで
構成したことを特徴とする内燃機関における点火コイル
の取付け装置。
1. A seal body made of a soft elastic body is provided at a portion where a plug cover tube for an ignition plug screwed to a cylinder head penetrates through the cylinder head cover and is opened, and the plug cover tube is opened by the seal body. In the mounting device, which is fitted so as to block the through hole of the portion and the cylinder head cover, and the ignition coil case made of synthetic resin containing the ignition coil is mounted on the seal body, the air vent passage to the inside of the plug cover pipe is provided. In the ignition coil case, a vertical hole is formed from the lower surface of the ignition coil case at a right angle thereto, and a horizontal hole is formed laterally from the side surface of the ignition coil case so as to communicate with the vertical hole. A mounting device for an ignition coil in an internal combustion engine, which is configured.
JP06182359A 1994-08-03 1994-08-03 Apparatus for mounting ignition coil in internal combustion engine Expired - Fee Related JP3140637B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06182359A JP3140637B2 (en) 1994-08-03 1994-08-03 Apparatus for mounting ignition coil in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06182359A JP3140637B2 (en) 1994-08-03 1994-08-03 Apparatus for mounting ignition coil in internal combustion engine

Publications (2)

Publication Number Publication Date
JPH0849640A true JPH0849640A (en) 1996-02-20
JP3140637B2 JP3140637B2 (en) 2001-03-05

Family

ID=16116940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP06182359A Expired - Fee Related JP3140637B2 (en) 1994-08-03 1994-08-03 Apparatus for mounting ignition coil in internal combustion engine

Country Status (1)

Country Link
JP (1) JP3140637B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0827165A2 (en) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Engine igniting coil device
US5771870A (en) * 1995-12-06 1998-06-30 Denso Corporation Ignition coil for an internal combustion engine
EP1783361A1 (en) * 2004-07-28 2007-05-09 Hitachi, Ltd. Ignition coil device for internal combustion engine
JP2009016374A (en) * 2007-06-29 2009-01-22 Denso Corp Ignition coil

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5771870A (en) * 1995-12-06 1998-06-30 Denso Corporation Ignition coil for an internal combustion engine
EP0827165A2 (en) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Engine igniting coil device
EP0827165A3 (en) * 1996-08-31 1998-10-28 Toyo Denso Kabushiki Kaisha Engine igniting coil device
EP0951026A2 (en) * 1996-08-31 1999-10-20 Toyo Denso Kabushiki Kaisha Engine igniting coil device
EP0951026A3 (en) * 1996-08-31 2000-04-19 Toyo Denso Kabushiki Kaisha Engine igniting coil device
EP1783361A1 (en) * 2004-07-28 2007-05-09 Hitachi, Ltd. Ignition coil device for internal combustion engine
EP1783361A4 (en) * 2004-07-28 2013-06-26 Hitachi Ltd Ignition coil device for internal combustion engine
JP2009016374A (en) * 2007-06-29 2009-01-22 Denso Corp Ignition coil

Also Published As

Publication number Publication date
JP3140637B2 (en) 2001-03-05

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