JPH06137120A - Valve for internal combustion engine - Google Patents
Valve for internal combustion engineInfo
- Publication number
- JPH06137120A JPH06137120A JP30584192A JP30584192A JPH06137120A JP H06137120 A JPH06137120 A JP H06137120A JP 30584192 A JP30584192 A JP 30584192A JP 30584192 A JP30584192 A JP 30584192A JP H06137120 A JPH06137120 A JP H06137120A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- shaft
- shaft end
- upper plate
- cap member
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
(57)【要約】
【目的】 バルブ軸端面の耐摩耗性を、熱処理や溶着等
の熱的方法によることなく向上させる。
【構成】 軸部２の端部に、上板7aと外筒部7bとからな
る、弁体３よりも硬質のキャップ部材７を圧入したこと
により、軸端面の耐摩耗性が向上し、かつ弁駆動時にお
いて上板7aの上面に偏荷重が作用しても、外筒部7bを介
して軸端部外周面に効果的に分散されるので、軸部の一
部に荷重が集中して、その部分に偏摩耗が生じるのを防
止しうる。
(57) [Abstract] [Purpose] To improve the wear resistance of the valve shaft end surface without using a thermal method such as heat treatment or welding. [Structure] A cap member 7 composed of an upper plate 7a and an outer cylinder portion 7b, which is harder than the valve body 3, is press-fitted into the end portion of the shaft portion 2, thereby improving wear resistance of the shaft end surface, and Even if an eccentric load acts on the upper surface of the upper plate 7a during valve driving, the load is concentrated on a part of the shaft portion because it is effectively dispersed on the outer peripheral surface of the shaft end portion via the outer cylindrical portion 7b. Therefore, it is possible to prevent uneven wear from occurring in that portion.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、弁体が例えばアルミニ
ウム又はその合金により成形された内燃機関用バルブに
係り、特に、バルブ軸端の耐摩耗性を向上させたバルブ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve for an internal combustion engine whose valve body is made of, for example, aluminum or its alloy, and more particularly to a valve having improved wear resistance at the valve shaft end.
【０００２】[0002]
【従来の技術】エンジンの許容回転数を高めるうえで最
も障害となるのは、動弁系の重量による慣性質量の増加
であり、特に、吸排気バルブの重量が大であると、弁体
のカムに対する追従性が損なわれて、高速性能を低下さ
せるだけでなく、カム等に対する負荷が大となって、機
械的損失も大きくなる。2. Description of the Related Art The most impediment to increasing the permissible engine speed is an increase in inertial mass due to the weight of the valve train. Particularly, when the intake and exhaust valves are heavy, Not only the followability to the cam is impaired and high-speed performance is deteriorated, but also the load on the cam and the like becomes large and the mechanical loss also becomes large.
【０００３】このような観点から、弁体を、通常の耐熱
合金鋼に代えて、アルミニウム又はその合金により成形
し、弁体をより軽量化する試みがなされている。From such a point of view, attempts have been made to reduce the weight of the valve body by molding the valve body with aluminum or an alloy thereof instead of the usual heat-resistant alloy steel.
【０００４】しかし、弁体をアルミニウム又はその合金
により成形すると、それらの硬度が耐熱合金鋼に比して
小さいため、特に、常時弁開閉に伴う大きな繰り返し荷
重や偏荷重等を受ける軸端面の耐摩耗性が問題となり、
耐久性、信頼性を低下させる。However, when the valve body is formed of aluminum or its alloy, the hardness thereof is smaller than that of the heat-resistant alloy steel. Wearability becomes a problem,
Reduces durability and reliability.
【０００５】この問題に対処するためには、バルブ軸端
部を熱処理等により調質して硬化させたり、軸端に、硬
質材料を、溶射、肉盛、焼着等により固着して硬化させ
るなどの強化策が考えられる。In order to deal with this problem, the end portion of the valve shaft is tempered and hardened by heat treatment or the like, or a hard material is fixed and hardened on the shaft end by thermal spraying, overlaying, burning or the like. Such strengthening measures are possible.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、弁体を
アルミニウムやその合金とすると、上記前者の調質によ
る硬化はあまり期待できない。また、上記した後者の硬
質材料の固着による硬化では、弁体との親和性の問題、
及び組成や融点等の違いなどによる熱膨張や熱ひずみ等
の問題があって、製造が難しく、また品質の安定性に欠
ける。However, if the valve body is made of aluminum or its alloy, the above-mentioned hardening due to tempering cannot be expected so much. Further, in the above-mentioned hardening by the fixation of the hard material, the problem of compatibility with the valve body,
In addition, there are problems such as thermal expansion and thermal strain due to differences in composition, melting point, etc., which makes production difficult and lacks quality stability.
【０００７】本発明は、上記課題に鑑みてなされたもの
で、バルブ軸端の耐摩耗性を、熱処理や溶着等の熱的な
方法によることなく、簡単な手段で向上させ、もって、
耐久性、信頼性に優れる内燃機関用バルブを提供するこ
とを目的としている。The present invention has been made in view of the above problems, and improves the wear resistance of the valve shaft end by a simple means without using a thermal method such as heat treatment or welding.
It is an object of the present invention to provide a valve for an internal combustion engine that has excellent durability and reliability.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、軸部の一端に傘部が連設された弁体にお
ける前記軸部の他端部に、上板とそれに連続する下向の
外筒部とよりなる前記弁体の材質よりも高硬度のキャッ
プ部材を圧入したことを特徴としている。To achieve the above object, according to the present invention, an upper plate and a second plate are continuous with the other end of the shaft portion of a valve body in which an umbrella portion is connected to one end of the shaft portion. It is characterized in that a cap member having a hardness higher than that of the material of the valve body, which is composed of a downward outer cylinder portion, is press-fitted.
【０００９】[0009]
【作用】軸部の端部に、上板と外筒部とよりなる、弁体
よりも硬質のキャップ部材を圧入したことにより、軸端
面の耐摩耗性が向上し、かつ弁駆動時において上板の上
面に偏荷重が作用しても、外筒部を介して軸端部外周面
に効果的に分散されるので、軸部の一部に荷重が集中し
て、その部分に偏摩耗が生じるのを防止しうる。The cap member, which is composed of the upper plate and the outer cylinder and is harder than the valve body, is press-fitted into the end portion of the shaft portion, so that the wear resistance of the shaft end surface is improved and the upper end portion is improved during valve driving. Even if an eccentric load is applied to the upper surface of the plate, it is effectively dispersed to the outer peripheral surface of the shaft end through the outer cylinder, so that the load is concentrated on a part of the shaft and uneven wear is caused on that part. It can be prevented from occurring.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１において、傘部(１)と軸部(ステム)(２)と
からなる弁体(３)は、アルミニウム合金により形成され
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a valve body (3) including an umbrella portion (1) and a shaft portion (stem) (2) is made of an aluminum alloy.
【００１１】弁体(３)における軸端部外周面には、図２
に拡大誇張して示すように、コッタ溝(４)部寄りに浅め
の環状凹溝(５)が形成され、また軸端面は、軸線上を中
心とするなだらかな球面(６)となっている。The outer peripheral surface of the shaft end of the valve body (3) is shown in FIG.
As shown in an enlarged and exaggerated manner, a shallow annular groove (5) is formed near the cotter groove (4), and the shaft end surface is a gentle spherical surface (6) centered on the axis. .
【００１２】(７)は、上板(7a)と、これに連接された下
向の外筒部(7b)とからなるキャップ部材で、例えば焼入
れ硬化した炭素鋼又はクロムモリブデン鋼等の特殊鋼に
より形成されている。キャップ部材(７)は、その外筒部
(7b)の内径を軸部(２)の外径よりも若干小径とするとと
もに、軸端部に嵌合した際、外筒部(7a)の開口端部内周
面が、上記軸部(２)の環状凹溝(５)と相対するようにし
てある。Reference numeral (7) is a cap member composed of an upper plate (7a) and a downward outer cylindrical portion (7b) connected to the upper plate, and is a special steel such as quench hardened carbon steel or chrome molybdenum steel. It is formed by. The cap member (7) has an outer cylindrical portion.
The inner diameter of (7b) is made slightly smaller than the outer diameter of the shaft portion (2), and when fitted to the shaft end portion, the inner peripheral surface of the opening end portion of the outer tubular portion (7a) is the above shaft portion (2). 2) so as to face the annular groove (5).
【００１３】上板(7b)の上記球面(６)と当接する内底面
は平坦面をなし、かつ外筒部(7b)が連設された角部の内
周面には、環状の逃げ溝(８)が形成されている。The inner bottom surface of the upper plate (7b), which abuts the spherical surface (6), is a flat surface, and the inner peripheral surface of the corner where the outer tubular portion (7b) is continuously provided has an annular relief groove. (8) is formed.
【００１４】外筒部(7b)の下端内周面は、圧入を容易と
するために、テーパ状に面取り(7c)されている。軸部
(２)の軸端部にキャップ部材(７)を上方により圧入する
と、キャップ部材(７)の外筒部(7b)は、極く僅か拡径方
向に弾性変形させられつつ進入する。そして上板(7a)の
内底面が軸端面と当接する最奥部まで圧入されると、軸
部(２)の環状凹溝(５)よりも下方に位置する外筒部(7b)
の下端部が、環状凹溝(５)内に向って極く僅か縮径して
食い込むとともに、軸端末部(９)が逃げ溝(８)内に向っ
て極に僅か拡径することにより、キャップ部材(７)の強
力な抜け止め作用が生じる。The inner peripheral surface at the lower end of the outer tubular portion (7b) is chamfered (7c) in a tapered shape in order to facilitate press fitting. Shaft
When the cap member (7) is pressed into the shaft end of (2) from above, the outer tubular portion (7b) of the cap member (7) enters while being elastically deformed in a very slight radial expansion direction. When the inner bottom surface of the upper plate (7a) is press-fitted to the innermost portion where it abuts the shaft end surface, the outer cylindrical portion (7b) located below the annular groove (5) of the shaft portion (2).
The lower end of the shaft bites into the annular groove (5) by slightly reducing its diameter, and the shaft end (9) slightly expands toward the pole toward the escape groove (8). A strong retaining action of the cap member (7) occurs.
【００１５】このように、キャップ部材(７)が軸端部に
強固に圧入されていると、弁体(３)の駆動時において、
万一上板(7a)の上面に、ロッカアームやタペット等(図
示略)による下向の偏荷重が作用したとしても、その荷
重は外筒部(7b)を介して軸端部外周面に分散されるの
で、軸端面の一部に荷重が集中して偏摩耗等を発生させ
ることはない。As described above, when the cap member (7) is firmly press-fitted into the shaft end portion, when the valve body (3) is driven,
Even if a downward biased load such as a rocker arm or tappet (not shown) acts on the upper surface of the upper plate (7a), the load is distributed to the outer peripheral surface of the shaft end via the outer cylinder (7b). As a result, the load is not concentrated on a part of the shaft end surface and uneven wear or the like does not occur.
【００１６】また、軸端面をなだらかな球面部(６)とし
たことにより、偏荷重によって弁体(３)又はキャップ部
材(７)の軸線が傾いても、軸端面とキャップ部材(７)の
上板(7a)とが偏当たりして高い面圧が作用することがな
く、軸端面が局部的に摩耗するのが防止される。Further, since the shaft end surface is formed into a gentle spherical surface portion (6), even if the axial line of the valve body (3) or the cap member (7) is tilted due to an unbalanced load, the shaft end surface and the cap member (7) are inclined. The upper plate (7a) is not eccentrically contacted with each other and a high surface pressure is not applied, and local wear of the shaft end surface is prevented.
【００１７】以上説明したように、上記実施例のバルブ
においては、弁体(３)がアルミニウム合金であっても、
単に軸端部に硬質材料よりなるキャップ部材(７)を圧入
するだけの簡単な手段で、バルブ軸端面の耐摩耗性を向
上させることができる。As described above, in the valve of the above embodiment, even if the valve body (3) is an aluminum alloy,
The wear resistance of the valve shaft end surface can be improved by simply pressing the cap member (7) made of a hard material into the shaft end portion.
【００１８】なお、実施例では、軸部(２)側に環状凹溝
(５)を、またキャップ部材(７)側に逃げ溝(８)をそれぞ
れ設けて、二重の抜け止め作用が生ずるようにしてある
が、それらの一方を省略して実施することもある。In the embodiment, an annular groove is formed on the shaft (2) side.
(5) and the escape groove (8) are provided on the side of the cap member (7) so as to have a double retaining function, but one of them may be omitted.
【００１９】また、外筒部(7b)の開口端部の、環状凹溝
(５)と相対する内周面に、内方に極く僅かに膨出する環
状突起(図示略)を形成してもよく、このようにするとキ
ャップ部材(７)の圧入時において、環状突起が環状凹溝
(５)内に積極的突入して、係止力が大となり、抜け止め
作用が増大する。Also, an annular groove at the open end of the outer cylindrical portion (7b)
An annular protrusion (not shown) that slightly bulges inward may be formed on the inner peripheral surface opposite to (5). In this case, when the cap member (7) is press-fitted, the annular protrusion is formed. Is an annular groove
(5) Actively plunges into the inside, increasing the locking force and increasing the retaining function.
【００２０】このような環状突起を設けると、常温での
圧入が困難となることが予想されるが、この場合には、
焼き嵌め又は冷し嵌め等の嵌合手段を用いればよい。When such an annular projection is provided, it is expected that press-fitting at room temperature will be difficult, but in this case,
Fitting means such as shrink fitting or cold fitting may be used.
【００２１】軸端側に球面部(６)を設ける代わりに、上
板(7a)の内底面側に設けてもよいのは勿論である。本発
明は、弁体(３)がチタン又はチタン合金により成形され
たバルブにも適用しうる。Of course, instead of providing the spherical portion (6) on the shaft end side, it may be provided on the inner bottom surface side of the upper plate (7a). The present invention can also be applied to a valve in which the valve body (3) is made of titanium or a titanium alloy.
【００２２】[0022]
【発明の効果】本発明によれば、次の効果を奏する。 (ａ) バルブ軸端面の耐摩耗性が向上するとともに、偏
荷重を軸端部外周面に効果的に分散されるので、例えば
弁体をアルミニウム合金等により成形しても、軸端面が
摩耗する恐れがない。According to the present invention, the following effects can be obtained. (a) Since the wear resistance of the valve shaft end surface is improved and the eccentric load is effectively dispersed on the outer peripheral surface of the shaft end portion, the shaft end surface is worn even if the valve body is molded with an aluminum alloy or the like. There is no fear.
【００２３】(ｂ) 軸部側に環状凹溝を設けるか、又は
キャップ部材の外筒部の連設角部に逃げ溝を形成する
と、キャップ部材の強力な抜け防止効果が得られる。(B) If the annular groove is provided on the shaft side or the relief groove is formed at the continuous corner portion of the outer cylinder of the cap member, a strong effect of preventing the cap member from coming off can be obtained.
【００２４】(ｃ) 従来のような熱的な方法によること
なく、簡単な手段でバルブ軸端面の耐摩耗性を向上しう
るので、安価なバルブを提供することができる。(C) Since the abrasion resistance of the valve shaft end surface can be improved by a simple means without using a conventional thermal method, an inexpensive valve can be provided.
【図１】本発明の一実施例を、アルミニウム合金製の弁
体に適用した例を示すバルブ全体の正面図である。FIG. 1 is a front view of the entire valve showing an example in which an embodiment of the present invention is applied to a valve body made of an aluminum alloy.
【図２】同じくキャップ部材圧入部を拡大誇張して示す
一部切欠正面図である。FIG. 2 is a partially cutaway front view showing the cap member press-fitting portion in an enlarged manner.
(１)傘部 (２)軸部 (３)弁体 (４)コッ
タ溝 (５)環状凹溝 (６)球面
部 (７)キャップ部材 (7a)上板 (7b)外筒部 (7c)面取
り (８)逃げ溝 (９)軸端
末部(1) Umbrella part (2) Shaft part (3) Valve body (4) Cotter groove (5) Annular groove (6) Spherical part (7) Cap member (7a) Upper plate (7b) Outer cylinder part (7c) Chamfer (8) Escape groove (9) Shaft end
Claims (4)
ける前記軸部の他端部に、上板とそれに連続する下向の
外筒部とよりなる前記弁体の材質よりも高硬度のキャッ
プ部材を圧入したことを特徴とする内燃機関用バルブ。1. A material of the valve body comprising an upper plate and a downward outer cylinder portion continuous with the upper plate at the other end of the shaft portion in the valve body in which the umbrella portion is continuously provided at one end of the shaft portion. A valve for an internal combustion engine, in which a cap member having a high hardness is press-fitted.
内周面と相対する位置に、環状凹溝が設けられている請
求項１記載の内燃機関用バルブ。2. A valve for an internal combustion engine according to claim 1, wherein an annular groove is provided at a position on the outer peripheral surface of the shaft end portion facing the inner peripheral surface of the opening end portion of the outer cylindrical portion.
内周面に、環状の逃げ溝が形成されている請求項１又は
２記載の内燃機関用バルブ。3. The valve for an internal combustion engine according to claim 1, wherein an annular relief groove is formed on an inner peripheral surface of a continuous corner portion of the outer cylinder portion of the cap member.
を、軸線上に中心を有する球面としてなる請求項１〜３
のいずれかに記載の内燃機関用バルブ。4. A spherical surface having a center on the axis of one of the facing surfaces of the upper plate and the shaft end surface.
5. A valve for an internal combustion engine according to any one of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30584192A JP3208508B2 (en) | 1992-10-21 | 1992-10-21 | Valve for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30584192A JP3208508B2 (en) | 1992-10-21 | 1992-10-21 | Valve for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06137120A true JPH06137120A (en) | 1994-05-17 |
| JP3208508B2 JP3208508B2 (en) | 2001-09-17 |
Family
ID=17950019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30584192A Expired - Fee Related JP3208508B2 (en) | 1992-10-21 | 1992-10-21 | Valve for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3208508B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008528891A (en) * | 2005-01-27 | 2008-07-31 | シャエフラー カーゲー | Electromagnetic hydraulic valve |
| WO2010026826A1 (en) * | 2008-09-05 | 2010-03-11 | 株式会社 日立製作所 | Fuel injection valve, and method for fitting two parts |
| JP2015098871A (en) * | 2013-11-19 | 2015-05-28 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ | Valve for valve device, method of manufacturing the same, and internal combustion engine comprising the same |
| JP2017031837A (en) * | 2015-07-29 | 2017-02-09 | 株式会社オティックス | Valve train of internal combustion engine |
-
1992
- 1992-10-21 JP JP30584192A patent/JP3208508B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008528891A (en) * | 2005-01-27 | 2008-07-31 | シャエフラー カーゲー | Electromagnetic hydraulic valve |
| KR101248751B1 (en) * | 2005-01-27 | 2013-04-03 | 섀플러 테크놀로지스 아게 운트 코. 카게 | Electromagnetic hydraulic valve |
| WO2010026826A1 (en) * | 2008-09-05 | 2010-03-11 | 株式会社 日立製作所 | Fuel injection valve, and method for fitting two parts |
| JP2010059898A (en) * | 2008-09-05 | 2010-03-18 | Hitachi Automotive Systems Ltd | Fuel injection valve and method of joining two components |
| US8881363B2 (en) | 2008-09-05 | 2014-11-11 | Hitachi Automotive Systems, Ltd. | Fuel injection valve and method for coupling two components together |
| US8888022B2 (en) | 2008-09-05 | 2014-11-18 | Hitachi Automotive Systems, Ltd. | Fuel injection valve and method for coupling two components together |
| JP2015098871A (en) * | 2013-11-19 | 2015-05-28 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ | Valve for valve device, method of manufacturing the same, and internal combustion engine comprising the same |
| JP2017031837A (en) * | 2015-07-29 | 2017-02-09 | 株式会社オティックス | Valve train of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3208508B2 (en) | 2001-09-17 |
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