JPS62233454A - Protecting device for spark plug attaching hole in motor cycle engine - Google Patents

Protecting device for spark plug attaching hole in motor cycle engine

Info

Publication number
JPS62233454A
JPS62233454A JP7639186A JP7639186A JPS62233454A JP S62233454 A JPS62233454 A JP S62233454A JP 7639186 A JP7639186 A JP 7639186A JP 7639186 A JP7639186 A JP 7639186A JP S62233454 A JPS62233454 A JP S62233454A
Authority
JP
Japan
Prior art keywords
spark plug
piece
mounting hole
cylinder head
attaching hole
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
Application number
JP7639186A
Other languages
Japanese (ja)
Inventor
Nobuyuki Terashita
寺下　伸志
Mitsuaki Kamimura
上村　満明
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha 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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP7639186A priority Critical patent/JPS62233454A/en
Publication of JPS62233454A publication Critical patent/JPS62233454A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles

Landscapes

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

Abstract

PURPOSE:To protect an attaching hole for a spark plug, by incorporating an overhanging piece integrally with a gasket disposed between a cylinder head and a cover therefor, and by mounting a cap member provided with a locking piece adapted to be superposed with the overhanging piece, on the spark plug. CONSTITUTION:Cam chambers 2a are formed in the vicinity of a cam shaft 1 and are provided with head covers 3, and a gasket 4 is disposed between the contact surfaces of the cam chambers and the head covers 3. In the above- mentioned arrangement, the gasket 4 is integrally incorporated with an overhanging piece 10 which overhangs outward and covers the space between the cam chambers 2a. Further, a spark plug 6 is mounted thereon with a cap member 7, thereafter, is fitted in a through-hole in the overhanging piece 10, and is then screwed into an attaching hole 5. With this arrangement, a locking piece 9 overhanging from the base section 9 of the cap member 7 covering the outer peripheral surface of the spark plug 6 is superposed with the overhanging piece 10, thereby it is possible to protect the spark plug attaching hole from mud splashed up from the front wheel of a motor-cycle.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は自動二輪車用エンジンにおけるスパークプラグ
の取付孔保護装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spark plug mounting hole protection device for a motorcycle engine.

［従来技術］ 従来５ダブルオ一バーヘツドカムシヤフト式エンジンを
搭載した自動二輪車において、そのエンジンは走行中に
泥等がかかる位置に設けられている。[Prior Art] In a conventional motorcycle equipped with a five-double overhead camshaft engine, the engine is installed at a position where it is exposed to mud and the like while the motorcycle is running.

よって、走行中に、前輪により跳ね上げられた砂等の異
物がシリンダーヘッド周辺に溜まることがある。Therefore, while the vehicle is running, foreign matter such as sand thrown up by the front wheels may accumulate around the cylinder head.

そして、従来において、ダブルオーバーヘッドカムシャ
フト式エンジンでは、前後に設けられたカムシャフトの
間のシリンダーヘッドに、スパークプラグの取付孔を配
殺しであるため、泥等が付着した場合、後でそれを取り
除く作業がきわめて面倒であるとの問題点があった。Conventionally, in double overhead camshaft type engines, the spark plug mounting hole is located in the cylinder head between the front and rear camshafts, so if mud or the like gets on it, it can be removed later. There was a problem in that the removal work was extremely troublesome.

何故なら、前後に突出して設けられたカムシャフトの部
分が泥等の除去作業の邪魔となっていたからである。This is because the camshaft portions protruding from the front and rear were obstructing the removal work of mud and the like.

〔発明の目的］ かくして、この発明は、前記従来の欠点や問題点を解消
するために創案されたものであり、自動二輪車の走行中
に、前輪によって砂等の異物がスパークプラグの周りに
跳ね上げられても、その砂等の異物がスパークプラグの
取付孔に侵入しないように、シリンダーヘッドに設けら
れたスパークプラグの取付孔を被覆して保護するスパー
クプラグ取付孔の保護装置を提供することを目的とする
ものである。[Object of the Invention] Thus, the present invention was devised to solve the above-mentioned conventional drawbacks and problems. To provide a spark plug mounting hole protection device that covers and protects a spark plug mounting hole provided in a cylinder head so that foreign matter such as sand does not enter the spark plug mounting hole even if the cylinder head is raised. The purpose is to

［発明の構成］ 本発明による自動二輪車用エンジンにおけるスパークプ
ラグの取付孔保護装置は、 自動二輪車用ダブルオーバーヘッドカムシャフト式エン
ジンであって、前後に設けられたカムシャフトの間のシ
リンダーヘッドに、スパークプラグ取付孔を配設したも
のにおいて、 前記カムシャフト近傍位置のシリンダーヘッドと、この
シリンダーヘッドのカバーとの間に介在されたガスケッ
トに、外側に張出す張出片を一体に形成し、 一方、前記取付孔に螺合されるスパークプラグには、前
記ガスケットの張出片と重なり合う略鍔状の係止片を設
けたキャップ蔚を装着して構成されているものである。[Structure of the Invention] The spark plug mounting hole protection device for a motorcycle engine according to the present invention is a double overhead camshaft type engine for a motorcycle, and the spark plug is installed in the cylinder head between the front and rear camshafts. In the plug mounting hole, a gasket interposed between the cylinder head near the camshaft and the cover of the cylinder head is integrally formed with an outwardly projecting piece; The spark plug that is screwed into the mounting hole is configured to have a cap holder provided with a substantially brim-shaped locking piece that overlaps the projecting piece of the gasket.

［発明の実施例］ 以下本発明を図面に示す実施例に基づいて説明をする。[Embodiments of the invention] The present invention will be described below based on embodiments shown in the drawings.

第１図は、本発明の自動二輪車用エンジンにおけるスパ
ークプラグの取付孔保護装置を示す概略図である。FIG. 1 is a schematic diagram showing a spark plug mounting hole protection device for a motorcycle engine according to the present invention.

図面において符号１はカムシャフトを示す。In the drawings, reference numeral 1 indicates a camshaft.

該カムシャフト１．１は、シリンダーヘッド２上の前後
に設けられている。The camshaft 1.1 is provided on the front and rear of the cylinder head 2.

このカムシャフト１．１にはタペット、バルブガイドを
介して吸気弁あるいは排気弁が接続されており、各々の
カムシャフト１、ｌで吸気弁或は排気弁を作動しうるよ
うに構成されている。An intake valve or an exhaust valve is connected to this camshaft 1.1 via a tappet and a valve guide, and each camshaft 1.1 is configured to operate the intake valve or exhaust valve. .

そして、シリンダーヘッド２上に設置されている各々の
カムシャフト１．１をカバーすべく、カムシャフト１．
１近傍位置のシリンダーヘッド２．２にはカム室２ａ、
２ａが形成され、該カム室２ａ、２ａには、各々ヘッド
カバー３．３が設けられている・ ところで、このシリンダーヘッド２のカム室２ａとヘッ
ドカバー３との接合面にはガスケット４が介在されてい
る。Then, in order to cover each camshaft 1.1 installed on the cylinder head 2, the camshaft 1.1.
The cylinder head 2.2 at a position near 1 has a cam chamber 2a,
2a is formed, and a head cover 3.3 is provided in each of the cam chambers 2a, 2a. By the way, a gasket 4 is interposed at the joint surface between the cam chamber 2a of the cylinder head 2 and the head cover 3. There is.

このガスケット４を介してシリンダーへラド２のカム室
２ａにヘッドカバー３を装着することにより、カムシャ
フト１設置側からのオイル等が外部に漏れないようにし
ているのである。By attaching the head cover 3 to the cam chamber 2a of the rad 2 to the cylinder via the gasket 4, oil etc. from the side where the camshaft 1 is installed is prevented from leaking to the outside.

そして、ガスケット４には、外側に張り出す張出片１０
が一体に形成されている。The gasket 4 has a projecting piece 10 projecting outward.
are integrally formed.

図面第２図に本発明によるスパークプラグ取付孔の保護
装置の平面図を示す、　　　′この図面で示すように前
後に配設されたカムシャフト１．１のカム室２ａ、２ａ
からは互いに張出片１０、ｌＯが延在し、この両張出片
１０、ｌＯは連結され、一体となって構成されているも
のである。FIG. 2 shows a plan view of a protection device for a spark plug mounting hole according to the present invention, 'As shown in this drawing, cam chambers 2a, 2a of a camshaft 1.1 arranged in the front and rear.
The overhanging pieces 10 and 10 extend from each other, and both the overhanging pieces 10 and 10 are connected and constituted as one piece.

そして、この張出片１０には、透孔１２が設けられ、こ
の透孔１２を貫挿してスパークプラグ６を取付孔５に螺
合することになる。This overhang piece 10 is provided with a through hole 12, through which the spark plug 6 is screwed into the mounting hole 5.

次に、符号５はスパークプラグの取付孔を示す。Next, reference numeral 5 indicates a spark plug mounting hole.

該取付孔５は前後に配設されたカムシャフト１、ｌの略
中間位置のシリンダーヘッド２Ｃに設けられている。The mounting hole 5 is provided in the cylinder head 2C at a substantially intermediate position between the camshafts 1 and 1 disposed in the front and rear.

また、符号６はスパークプラグであり、このスパークプ
ラグ６には合成樹脂材あるいはゴム材等で形成されたキ
ャップ材７が装着されている。Further, reference numeral 6 denotes a spark plug, and a cap member 7 made of a synthetic resin material, a rubber material, or the like is attached to the spark plug 6.

該キャップ材７はスパークプラグ６の外周面を被覆する
略円筒状の基部８と、この基部８の一端側位置から外側
方向に張出す略鍔状の係止片９を備えて構成されている
。The cap member 7 includes a substantially cylindrical base 8 that covers the outer peripheral surface of the spark plug 6, and a substantially brim-shaped locking piece 9 that extends outward from one end of the base 8. .

以上において、次に本発明の製作及び使用状態について
説明する。In the above, the manufacturing and usage conditions of the present invention will now be explained.

先ず、ダブルオーバーへラドカム式エンジンの製作に際
して、シリンダーヘッド２のカム室２ａとヘッドカバー
３との間に介在されるガスケット４を、外側に張り出す
張出片１０を一体に形成したものとする。First, when manufacturing a double-over Rad cam type engine, a gasket 4 interposed between a cam chamber 2a of a cylinder head 2 and a head cover 3 is integrally formed with a projecting piece 10 projecting outward.

例えば、第２図に示す様に相隣るシリンダーヘッド２．
２のカム室２ａ、２ａ間を被覆する張出片１０を一体に
形成したガスケット４とするのが好ましい。For example, as shown in FIG. 2, adjacent cylinder heads 2.
It is preferable that the gasket 4 is integrally formed with a projecting piece 10 that covers the space between the two cam chambers 2a.

尚、前述の通り、この張出片１０には、スパークプラグ
６の取付孔５に対応する位置にスパークプラグ６の挿入
用の透孔１２を穿設しておくものとする。As mentioned above, the projecting piece 10 is provided with a through hole 12 for inserting the spark plug 6 at a position corresponding to the mounting hole 5 of the spark plug 6.

一方、スパークプラグ６には、キャップ材７を装着して
おき、そのスパークプラグ６を前記張出片１０の透孔内
に挿入して取付孔５に螺合させる。スパークプラグ６を
完全に取付孔５に螺合させると、第１図に示す様に係止
片９と張出片１０とは重なり合い、前輪１１から跳ね上
げられた砂、泥等をこの箇所で阻止することになる。On the other hand, a cap member 7 is attached to the spark plug 6, and the spark plug 6 is inserted into the through hole of the overhang piece 10 and screwed into the mounting hole 5. When the spark plug 6 is completely screwed into the mounting hole 5, the locking piece 9 and the overhanging piece 10 overlap as shown in FIG. It will be prevented.

よって、たとえ走行中において前輪１１により砂等がシ
リンダーヘッド２の周辺に跳ね上げられても、スパーク
プラグ６の取付孔５まで侵入することはない。Therefore, even if sand or the like is thrown up around the cylinder head 2 by the front wheels 11 while the vehicle is running, it will not enter the mounting hole 5 of the spark plug 6.

もってスパークプラグ６の取付孔５の保護がなされるこ
とになる。As a result, the mounting hole 5 of the spark plug 6 is protected.

［発明の効果］ 本発明は以上の構成より成る。[Effect of the invention] The present invention consists of the above configuration.

そして、本発明による自動二輪車用エンジンにおけるス
パークプラグの取付孔保護装置であれば、きわめて簡単
な構造によって、その走行中に、前輪により跳ね上げら
れた砂等の異物がシリンダーヘッド周辺からスパークプ
ラグの取付孔へ侵入するのを確実に防止することができ
ることとなる。The spark plug mounting hole protection device for a motorcycle engine according to the present invention has an extremely simple structure, so that foreign matter such as sand thrown up by the front wheel can be removed from the spark plug from around the cylinder head while the motorcycle is running. This means that it can be reliably prevented from entering the mounting hole.

また１本発明の構造は、簡単な部品の交換、たとえばガ
スケットの交換等で従来の自動二輪車におけるエンジン
においても容易に採用することができ、その点から製造
コストを安価にすることができる。Furthermore, the structure of the present invention can be easily adopted in engines of conventional motorcycles by simply replacing parts, such as replacing gaskets, and from this point of view, manufacturing costs can be reduced.

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

第１図は本発明によるスパークプラグの取付孔保護装置
の要部を示す概略断面図、第２図は本発明の平面図、第
３図はダブルオーバーヘッドカムシャフト式エンジンを
搭載した自動二輪車を示す概略図である。 １０１カムシヤフト、 ２．２Ｃ・参〇シリンダーヘッド。 ２ａ・・・シリンダーヘッドのカム室、３・Φ・ヘッド
カバー、 ４・ｅφガスケット、 ５・・・スパークプラグの取付孔、 ６・争・スパークプラグ、 ７・・拳キャップ材、 ８・・・基部、 ９φ・φ係止片、 １０・番台張出片、 １１・・・前輪、 １２・争・張出片の透孔。FIG. 1 is a schematic cross-sectional view showing the main parts of a spark plug mounting hole protection device according to the present invention, FIG. 2 is a plan view of the present invention, and FIG. 3 is a motorcycle equipped with a double overhead camshaft engine. It is a schematic diagram. 101 camshaft, 2.2C cylinder head. 2a...Cylinder head cam chamber, 3.Φ Head cover, 4 Eφ gasket, 5... Spark plug mounting hole, 6. Spark plug, 7. Fist cap material, 8... Base , 9φ/φ locking piece, 10. Number plate overhang piece, 11... Front wheel, 12. Through hole in the battle piece.

Claims (1)

【特許請求の範囲】 自動二輪車用ダブルオーバーヘッドカムシャフト式エン
ジンであって、 前後に設けられたカムシャフトの間のシリンダ−ヘッド
に、スパークプラグ取付孔を配設したものにおいて、 前記カムシャフト近傍位置のシリンダーヘッドと、この
シリンダーヘッドのカバーとの間に介在されたガスケッ
トに、外側に張出す張出片を一体に形成し、 一方、前記取付孔に螺合されるスパークプラグには、前
記ガスケットの張出片と重なり合う略鍔状の係止片を設
けたキャップ材を装着してなることを特徴とする自動二
輪車用エンジンにおけるスパークプラグの取付孔保護装
置[Scope of Claims] A double overhead camshaft engine for a motorcycle, in which a spark plug mounting hole is provided in a cylinder head between front and rear camshafts, comprising: a spark plug mounting hole located near the camshaft; A gasket interposed between the cylinder head and the cover of the cylinder head is integrally formed with an outwardly projecting piece; A spark plug mounting hole protection device for a motorcycle engine, characterized in that the device is equipped with a cap material provided with a substantially brim-shaped locking piece that overlaps with an overhanging piece.
JP7639186A 1986-04-02 1986-04-02 Protecting device for spark plug attaching hole in motor cycle engine Pending JPS62233454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7639186A JPS62233454A (en) 1986-04-02 1986-04-02 Protecting device for spark plug attaching hole in motor cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7639186A JPS62233454A (en) 1986-04-02 1986-04-02 Protecting device for spark plug attaching hole in motor cycle engine

Publications (1)

Publication Number Publication Date
JPS62233454A true JPS62233454A (en) 1987-10-13

Family

ID=13604019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7639186A Pending JPS62233454A (en) 1986-04-02 1986-04-02 Protecting device for spark plug attaching hole in motor cycle engine

Country Status (1)

Country Link
JP (1) JPS62233454A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01158540U (en) * 1988-04-18 1989-11-01
JPH02141680U (en) * 1989-04-28 1990-11-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01158540U (en) * 1988-04-18 1989-11-01
JPH02141680U (en) * 1989-04-28 1990-11-29

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