JPH041284Y2 - - Google Patents
Info
- Publication number
- JPH041284Y2 JPH041284Y2 JP5365186U JP5365186U JPH041284Y2 JP H041284 Y2 JPH041284 Y2 JP H041284Y2 JP 5365186 U JP5365186 U JP 5365186U JP 5365186 U JP5365186 U JP 5365186U JP H041284 Y2 JPH041284 Y2 JP H041284Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- supply
- exhaust
- valve guide
- annular recess
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Lift Valve (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は内燃機関の給・排気弁案内装置に関
し、特に給・排気弁の弁軸と弁ガイドとの間の隙
間に燃焼生成物を堆積させないようにした給・排
気弁案内装置に関する。[Detailed description of the invention] Industrial application field The present invention relates to a supply/exhaust valve guide device for an internal combustion engine, and is particularly designed to prevent combustion products from accumulating in the gap between the valve stem and the valve guide of the supply/exhaust valve. This invention relates to a supply/exhaust valve guide device.
従来の技術
内燃機関の給・排気弁はその弁軸が弁ガイドで
摺動自在に案内されることによつて往復運動する
ようになつている。このような往復運動は弁軸と
弁ガイドの内径部との間に適切なクリアランスを
設けることによつて円滑に行われるようにしてい
る。ところが、弁軸と弁ガイドとの間のクリアラ
ンスのために燃焼生成物が弁軸と弁ガイドとの間
のすきまに入り込み、堆積して給・排気弁の運動
を悪くする傾向があつた。BACKGROUND OF THE INVENTION Supply/exhaust valves for internal combustion engines are configured to reciprocate by having their valve shafts slidably guided by valve guides. Such reciprocating motion is performed smoothly by providing an appropriate clearance between the valve stem and the inner diameter portion of the valve guide. However, due to the clearance between the valve stem and the valve guide, combustion products tend to enter the gap between the valve stem and the valve guide and accumulate, impairing the movement of the supply and exhaust valves.
考案が解決しようとする問題点
弁軸と弁ガイドとの間に入り込んだ燃焼生成物
の堆積物は給・排気弁のステイツク、スカツフを
引き起こし、給・排気弁の往復運動を悪くし、つ
いには給・排気弁のリフトロスを招いてピストン
との干渉を生じさせることがあつた。本考案はこ
のような傾向をなくすことを目的として、給・排
気弁の円滑な往復運動を妨げる燃焼生成物の堆積
を生じさせないように絶えず掻き落とすように構
成した内燃機関の給・排気弁案内装置を提供する
ことにある。Problems that the invention aims to solve: Deposits of combustion products that have entered between the valve stem and the valve guide cause the intake and exhaust valves to become stuck and scuffed, impairing the reciprocating motion of the intake and exhaust valves, and eventually This caused lift loss in the supply and exhaust valves, which caused interference with the piston. In order to eliminate this tendency, the present invention provides a guide for the supply and exhaust valves of an internal combustion engine, which is configured to constantly scrape off combustion products to prevent the accumulation of combustion products that would hinder the smooth reciprocating movement of the supply and exhaust valves. The goal is to provide equipment.
問題点を解決するための手段
本考案のこの目的は、弁軸を案内する弁ガイド
の下端部においてその内径部に環状凹部を設け、
弁軸のこれに対向する部分に軸細部を設けて環状
凹部部の肩と軸細部の肩とによつてスクレイパー
を構成した給・排気弁を提供することによつて達
成される。この構成では、給・排気弁の往復運動
中スクレイパーの働きにより燃焼生成物を絶えず
掻き落とすから燃焼生成物を弁軸と弁ガイドとの
間に堆積させることがない。Means for Solving the Problems This object of the present invention is to provide an annular recess in the inner diameter of the lower end of the valve guide that guides the valve shaft;
This is achieved by providing a shaft detail on the opposite portion of the valve stem, and providing a supply/exhaust valve in which a scraper is formed by the shoulder of the annular recess and the shoulder of the shaft detail. With this configuration, the scraper continuously scrapes off the combustion products during the reciprocating movement of the supply/exhaust valve, so that the combustion products are not deposited between the valve stem and the valve guide.
実施例
今、本考案をその一実施例を示す添付図面を参
照して詳細に説明する。１は給・排気弁、２は弁
ガイドであつて、給・排気弁の弁軸３はこの弁ガ
イド２で往復運動自在に案内される。弁ガイド２
はその下端内径部に環状凹部４を有し、弁軸３に
はこの環状凹部４と対向する部分に軸細部５が形
成されている。環状凹部４の肩６と軸細部５の肩
７は給・排気弁の往復運動中互いに協同してスク
レパーを構成する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, which illustrate one embodiment of the invention. 1 is a supply/exhaust valve, 2 is a valve guide, and a valve shaft 3 of the supply/exhaust valve is guided by this valve guide 2 so as to be able to freely reciprocate. Valve guide 2
has an annular recess 4 in the inner diameter portion of its lower end, and a shaft detail 5 is formed in the portion of the valve stem 3 that faces the annular recess 4. The shoulder 6 of the annular recess 4 and the shoulder 7 of the shaft detail 5 cooperate with each other to form a scraper during the reciprocating movement of the supply/exhaust valve.
この構成では、内燃機関の作動中燃焼生成物が
弁ガイド２の環状凹部４に堆積するとしてもスク
レイパーの働きにより絶えず掻き落とすので、燃
焼生成物が弁軸３と弁ガイド２との間の隙間に入
り込んでそこに堆積することはない。従来の構成
では、燃焼生成物の堆積で給・排気弁のリフトロ
スが20時間乃至30時間で起こり給・排気弁の傘の
表面がピストンと干渉することがあつたが、本考
案の構成では、1000時間以上かかるトラブルがな
かつた。 With this configuration, even if combustion products accumulate in the annular recess 4 of the valve guide 2 during operation of the internal combustion engine, they are constantly scraped off by the action of the scraper. It does not enter and accumulate there. In the conventional configuration, the lift loss of the supply/exhaust valves occurred after 20 to 30 hours due to the accumulation of combustion products, and the surface of the valve caps of the supply/exhaust valves sometimes interfered with the piston, but with the configuration of the present invention, There were no problems that took more than 1000 hours.
考案の効果
本考案は上記のように構成したから、給・排気
弁の弁軸と弁ガイドとの間に燃焼生成物を堆積さ
せないから、弁の運動のリフトロスを生じさせる
ことがなく、従つてエンジンをトラブルなく長期
間にわたつて使用することができる。Effects of the invention Since the present invention is configured as described above, combustion products are not deposited between the valve stem and the valve guide of the supply/exhaust valve, so there is no lift loss in the valve movement, and therefore The engine can be used for a long period of time without trouble.
添付図面は本考案による給・排気弁と弁ガイド
との関係を示す給・排気弁案内装置の図である。
１……給・排気弁、２……弁ガイド、３……弁
軸、４……環状凹部、５……軸細部、６，７……
肩。
The accompanying drawing is a diagram of a supply/exhaust valve guide device according to the present invention, showing the relationship between the supply/exhaust valve and the valve guide. 1... Supply/exhaust valve, 2... Valve guide, 3... Valve stem, 4... Annular recess, 5... Shaft detail, 6, 7...
shoulder.
Claims (1)
内径部に環状凹部を設け、弁軸のこれに対向する
部分に軸細部を設けて環状凹部部の肩と軸細部の
肩とによつてスクレイパーを構成したことを特徴
とする内燃機関の給・排気弁案内装置。 An annular recess is provided on the inner diameter of the lower end of the valve guide that guides the valve stem, and a shaft detail is provided in the opposite part of the valve shaft, and a scraper is formed by the shoulder of the annular recess and the shoulder of the shaft detail. A supply/exhaust valve guide device for an internal combustion engine, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5365186U JPH041284Y2 (en) | 1986-04-10 | 1986-04-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5365186U JPH041284Y2 (en) | 1986-04-10 | 1986-04-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62165410U JPS62165410U (en) | 1987-10-21 |
| JPH041284Y2 true JPH041284Y2 (en) | 1992-01-17 |
Family
ID=30879913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5365186U Expired JPH041284Y2 (en) | 1986-04-10 | 1986-04-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH041284Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5296594B2 (en) * | 2009-04-07 | 2013-09-25 | 日鍛バルブ株式会社 | Exhaust poppet valve for internal combustion engines |
| JP2020169586A (en) * | 2019-04-02 | 2020-10-15 | マツダ株式会社 | Engine valve gear |
-
1986
- 1986-04-10 JP JP5365186U patent/JPH041284Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62165410U (en) | 1987-10-21 |
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