JPH0515523Y2 - - Google Patents
Info
- Publication number
- JPH0515523Y2 JPH0515523Y2 JP3758986U JP3758986U JPH0515523Y2 JP H0515523 Y2 JPH0515523 Y2 JP H0515523Y2 JP 3758986 U JP3758986 U JP 3758986U JP 3758986 U JP3758986 U JP 3758986U JP H0515523 Y2 JPH0515523 Y2 JP H0515523Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve lifter
- valve
- fiber
- resin
- fibers
- 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 - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 description 16
- 239000002243 precursor Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、直打式動弁系を有する内燃機関用繊
維強化バルブリフタに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fiber-reinforced valve lifter for an internal combustion engine having a direct-acting valve train.
カムシヤフト回転によるカムリフト量を直接バ
ルブに伝える直打式動弁系を有する内燃エンジン
ではバルブリフタが用いられている。当該バルブ
リフタはバルブの円滑な上下方向往復運動を行わ
せるために不可欠である。また、最近の高回転高
出力エンジンでは軽量化が特に要求されている。
従来この種の駆動リフタには鋳鉄や鋼が用いられ
ているが、鋳鉄・鋼製バルブリフタは比重が大き
く重いため摩擦トルクやレスポンス（エンジンの
吹き上がり性）の点で十分なものでない。
A valve lifter is used in an internal combustion engine having a direct-acting valve system that directly transmits the amount of cam lift caused by rotation of a camshaft to a valve. The valve lifter is essential for smooth vertical reciprocation of the valve. Furthermore, recent high-speed, high-output engines are particularly required to be lightweight.
Conventionally, cast iron or steel has been used for this type of drive lifter, but cast iron and steel valve lifters have a large specific gravity and are heavy, so they are not sufficient in terms of friction torque and response (engine speed).
一方、この対策として、最近では軽量化による
慣性質量低減による動弁系摩擦トルク低減をはか
るため、より軽量材であるFRP（繊維強化樹脂）
化の検討が進められている（たとえば、実願昭60
−111095号（実開昭62−20102号公報参照））。 On the other hand, as a countermeasure for this, recently, in order to reduce the friction torque of the valve train by reducing the inertia mass by reducing the weight, FRP (fiber reinforced resin), which is a lighter material, has been used.
(For example, the
-111095 (see Utility Model Application Publication No. 1982-20102)).
FRPバルブリフタは軽量化手段としては優れ
たものである。従来のバルブリフタは、成形性の
面から、炭素、ガラス繊維などの短繊維強化樹脂
製が一般であるが、繊維配向がランダムであり、
かつ短繊維であるため、FRPバルブリフタの円
筒部と頂面部の境界部の強度が鋼製等に比べ低
く、頂面部と円筒部の境界部の体積を、すなわち
頂面部の肉厚を鋼製より増さなければならないと
いう問題があつた。
FRP valve lifters are an excellent means of weight reduction. Conventional valve lifters are generally made of short fiber-reinforced resins such as carbon or glass fibers from the viewpoint of moldability, but the fiber orientation is random;
In addition, since it is a short fiber, the strength of the boundary between the cylindrical part and the top part of the FRP valve lifter is lower than that of steel, etc., and the volume of the boundary part between the top part and the cylindrical part, that is, the wall thickness of the top part, is lower than that of steel. The problem was that we had to increase it.
本考案は、FRPバルブリフタの頂面部と円筒
部の境界部（連結部）の強度を向上させる構造を
提供することを目的とする。 The present invention aims to provide a structure that improves the strength of the boundary (connection) between the top surface and cylindrical portion of an FRP valve lifter.
上記目的を達成するための本考案に係る繊維強
化樹脂バルブリフタは、円筒部と該円筒部の上端
に一体につながる頂面部とから成る直打式動弁系
を有する内燃機関用繊維強化樹脂バルブリフタに
おいて、樹脂を含浸した長繊維の網目袋状物から
形成した円筒部および頂面部下部と、短繊維強化
樹脂から形成した頂面部上部とが、一体に圧縮成
形されているものから成る。
A fiber-reinforced resin valve lifter according to the present invention to achieve the above object is a fiber-reinforced resin valve lifter for an internal combustion engine having a direct-acting valve system consisting of a cylindrical portion and a top surface portion integrally connected to the upper end of the cylindrical portion. The cylindrical part and the lower part of the top part are formed from a resin-impregnated mesh bag of long fibers, and the upper part of the top part is made of short fiber reinforced resin, which are integrally compression-molded.
上記本考案のバルブリフタでは、円筒部と頂面
部下部とは、網目袋状物構造を採用しているため
高強度で一体化されており、円筒部と頂面部下部
との連結部の強度が増大されている。したがつ
て、従来のような頂面部の厚肉化を伴わないで、
構造上の信頼性が向上されている。また、頂面部
上部は短繊維強化樹脂のためその成形性は良好で
ある。
In the above-mentioned valve lifter of the present invention, the cylindrical part and the lower part of the top part are integrated with high strength due to the mesh bag structure, increasing the strength of the connection part between the cylindrical part and the lower part of the top part. has been done. Therefore, without increasing the thickness of the top surface like in the past,
Structural reliability has been improved. Furthermore, since the upper part of the top surface is made of short fiber reinforced resin, its moldability is good.
以下に、本考案に係る繊維強化樹脂バルブリフ
タの望ましい実施例を、図面を参照して説明す
る。
Preferred embodiments of the fiber-reinforced resin valve lifter according to the present invention will be described below with reference to the drawings.
第１図は本考案実施例の直打式動弁系を有する
内燃機関で用いられるバルブリフタ１０を示して
いる。 FIG. 1 shows a valve lifter 10 used in an internal combustion engine having a direct-acting valve system according to an embodiment of the present invention.
バルブリフタ１０は、円筒部１２と、円筒部１
２の上端部につながる、円板状で該円板状部の外
周に上方に突出する突出部を有する頂面部１４と
から成る。頂面部１４は上下方向の中間で構成材
の異なる頂面部上部１６と頂面部下部１８とを一
体に合せたものから成る。 The valve lifter 10 includes a cylindrical portion 12 and a cylindrical portion 1.
2, the top surface part 14 is disc-shaped and has a protruding part projecting upward on the outer periphery of the disc-shaped part. The top part 14 is formed by integrally combining an upper part 16 and a lower part 18, which are made of different constituent materials, at the middle in the vertical direction.
円筒部１２と頂面部下部１８とは同一の構成材
から成る。円筒部１２と頂面部下部１８は、ガラ
ス繊維、炭素繊維、アラミド繊維、ナイロン繊維
等の樹脂繊維の何れか、またはこれらの組合せ、
から成る長繊維２０（長さが25mm以上を本考案で
は長繊維とする。ただし線径は通常の７〜９ミク
ロン程度でよい。）の網目状物を複数層重ね合せ
て成形で袋状物（第２図参照）とし、それに、樹
脂２２（たとえばエポキシ、ビニルエステル、ポ
リイミド等の熱硬化型樹脂、または熱可塑性樹
脂）を含浸させたものから成る。ただし、望まし
くは、円筒部１２を周方向に延びる長繊維２０は
円筒部１２の周方向には１周する長さを有してお
り、したがつて直径30mm程度の円筒部１２では周
方向に延びる長繊維２０は長さは90mm程度とな
り、それと直交する方向に延びる長繊維２０は、
バルブリフタ１０の下端の一端から上方に上つて
頂面部１４を通つて対向する下端迄到る長さを有
している。 The cylindrical portion 12 and the lower top portion 18 are made of the same material. The cylindrical portion 12 and the lower top portion 18 are made of resin fibers such as glass fibers, carbon fibers, aramid fibers, and nylon fibers, or a combination thereof.
A bag-like product is made by stacking multiple layers of long fibers 20 (long fibers with a length of 25 mm or more are defined as long fibers in this invention. However, the wire diameter may be about 7 to 9 microns) and forming them. (see FIG. 2) and impregnated with a resin 22 (eg, thermosetting resin such as epoxy, vinyl ester, polyimide, or thermoplastic resin). However, desirably, the long fibers 20 extending in the circumferential direction of the cylindrical part 12 have a length that makes one circumference in the circumferential direction of the cylindrical part 12. Therefore, in the cylindrical part 12 having a diameter of about 30 mm, The long fibers 20 that extend have a length of about 90 mm, and the long fibers 20 that extend in a direction perpendicular to the long fibers 20 have a length of about 90 mm.
It has a length extending upward from one lower end of the valve lifter 10 through the top surface portion 14 to the opposite lower end.
頂面部上部１６は、ガラス繊維、炭素繊維、ア
ラミド繊維、ナイロン繊維等の樹脂繊維の何れ
か、またはこれらの組合せ、から成る短繊維２４
（長さが25mmより小さいものを本考案では短繊維
とする）を樹脂２６中に混入して強化した繊維強
化樹脂から成る。頂面部上部１６の外周には、シ
ムをカムとの間に介装するような場合には、上方
に向つて突出する凸部２８が形成される。 The top portion 16 is made of short fibers 24 made of resin fibers such as glass fibers, carbon fibers, aramid fibers, and nylon fibers, or a combination thereof.
(In the present invention, short fibers are defined as short fibers having a length of less than 25 mm) mixed into the resin 26 for reinforcement. A convex portion 28 is formed on the outer periphery of the top portion upper portion 16 so as to protrude upward when a shim is interposed between the shim and the cam.
頂面部上部１６の成形前駆体３０は、頂面部下
部１８と円筒部１２との樹脂含浸網目袋状物の成
形前駆体３２に、圧縮成形によつて一体化され
る。この成形においては、第２図の樹脂を含浸さ
せた網目袋状物の成形前駆体３２を、バルブリフ
タ成形用下金型（第４図）３４にかぶせ、その上
に頂面部上部１６の成形前駆体３０を載せ、第３
図に示すように、上金型３６で押圧して、一体に
成形する。 The molded precursor 30 of the top part upper part 16 is integrated with the molded precursor 32 of the resin-impregnated mesh bag of the top part lower part 18 and the cylindrical part 12 by compression molding. In this molding, the molding precursor 32 of the mesh bag-like material impregnated with the resin shown in FIG. Place the body 30 on the third
As shown in the figure, the upper mold 36 is used to press and mold them into one piece.
成形においては、成形前駆体３０，３２の成形
圧および成形温度が適宜に設定される。たとえ
ば、樹脂にエポキシを用いる場合は、成形圧が７
〜10Kg／cm2、成形温度が180℃程度であり、ビニ
ルエステルの場合は成形圧が約100Kg／cm2、成形
温度が約130℃であり、ポリイミドの場合は成形
圧力が約200Kg／cm2、成形温度が約260℃程度であ
る。 In the molding, the molding pressure and molding temperature of the molding precursors 30 and 32 are set appropriately. For example, when using epoxy as the resin, the molding pressure is 7
~10Kg/cm 2 , the molding temperature is about 180℃; for vinyl ester, the molding pressure is about 100Kg/cm 2 , and the molding temperature is about 130℃; for polyimide, the molding pressure is about 200Kg/cm 2 , the molding temperature is about 260℃.
圧縮成形によつて得られたバルブリフタは、外
周面および必要な摺接面を切削加工され、最終製
品のバルブリフタ１０が得られる。 The valve lifter obtained by compression molding is processed by cutting the outer peripheral surface and necessary sliding surfaces to obtain the valve lifter 10 as a final product.
第６図は該バルブリフタ１０を直打式動弁系を
有する内燃機関に組付けた状態を示す。ここで、
３８はバルブ、４０はカム、４２はバルブスプリ
ング、４４はシム、４６はシリンダヘツドである
が、この組付け構成は従来構造と同じである。 FIG. 6 shows the valve lifter 10 assembled into an internal combustion engine having a direct-acting valve system. here,
38 is a valve, 40 is a cam, 42 is a valve spring, 44 is a shim, and 46 is a cylinder head, and this assembly structure is the same as the conventional structure.
つぎに、本考案実施例における作用について説
明する。 Next, the operation of the embodiment of the present invention will be explained.
バルブリフタ１０は円筒部１２と頂面部下部１
８を樹脂含浸の長繊維袋状物から構成されている
ので、円筒部１２と頂面部１４とは、それらの境
界部（連結部）４８において長繊維で強固につな
がつており、境界部４８の強度は大幅に向上され
ている。 The valve lifter 10 has a cylindrical portion 12 and a lower top portion 1.
8 is made of a resin-impregnated long fiber bag-like material, the cylindrical portion 12 and the top surface portion 14 are firmly connected by the long fibers at the boundary portion (connection portion) 48 between them. Strength has been significantly improved.
強度向上の程度を調べるために、第５図に示す
ように試験を行なつた。直径約30mmのバルブリフ
タ１０に、直径５mmの円柱４８を送り速度１mm／
minで動かして強度を調べたところ、従来の短繊
維FRPバルブリフタより、約50％の強度アツプ
の値を得た。また、強度を短繊維FRPバルブリ
フタと同程度にした場合、頂面部１４の肉厚を短
繊維FRPバルブリフタより約25％程度減少させ
ることができることが判明した。 In order to examine the degree of strength improvement, a test was conducted as shown in FIG. A cylinder 48 with a diameter of 5 mm is fed to a valve lifter 10 with a diameter of approximately 30 mm at a feed rate of 1 mm/
When we tested the strength by moving it at min., we found that the strength was approximately 50% higher than that of conventional short fiber FRP valve lifters. Furthermore, it has been found that when the strength is made comparable to that of a short fiber FRP valve lifter, the thickness of the top surface portion 14 can be reduced by approximately 25% compared to that of a short fiber FRP valve lifter.
以上説明したように、本考案のバルブリフタ構
造においては、頂面部下部と円筒部とを樹脂を含
浸した長繊維網目袋状物から形成したので、境界
部の強度を大幅に向上できる。
As explained above, in the valve lifter structure of the present invention, since the lower top portion and the cylindrical portion are formed from a resin-impregnated long fiber mesh bag-like material, the strength of the boundary portion can be significantly improved.
第１図は本考案の一実施例に係るバルブリフタ
の半分を断面にして示した正面図、第２図は第１
図のバルブリフタに用いる頂面下部および円筒部
の成形前駆体の斜視図、第３図は第１図のバルブ
リフタ成形時の断面図、第４図は第３図の成形用
下金型の断面図、第５図は第１図のバルブリフタ
に対する強度試験図、第６図は第１図のバルブリ
フタをエンジンに組みつけたときの断面図、であ
る。
１０……バルブリフタ、１２……円筒部、１４
……頂面部、１６……頂面部上部、１８……頂面
部下部、２０……長繊維、２４……短繊維、３
０，３２……成形前駆体、４８……境界部。
FIG. 1 is a front view showing a half section of a valve lifter according to an embodiment of the present invention, and FIG.
A perspective view of a molding precursor for the lower top surface and cylindrical part used in the valve lifter shown in the figure, Figure 3 is a sectional view of the valve lifter of Figure 1 during molding, and Figure 4 is a sectional view of the lower mold for molding of Figure 3. , FIG. 5 is a strength test diagram for the valve lifter of FIG. 1, and FIG. 6 is a sectional view of the valve lifter of FIG. 1 assembled into an engine. 10... Valve lifter, 12... Cylindrical portion, 14
...Top part, 16...Top part upper part, 18...Top part lower part, 20...Long fiber, 24...Short fiber, 3
0, 32... Molding precursor, 48... Boundary part.
Claims (1)
部とから成る直打式動弁系を有する内燃機関用繊
維強化樹脂バルブリフタにおいて、樹脂を含浸し
た長繊維の網目袋状物から形成した円筒部および
頂面部下部と、短繊維強化樹脂から形成した頂面
部上部とが、一体に圧縮成形されていることを特
徴とする繊維強化樹脂バルブリフタ。 In a fiber-reinforced resin valve lifter for an internal combustion engine having a direct-acting valve operating system consisting of a cylindrical part and a top part integrally connected to the upper end of the cylindrical part, the cylindrical part is formed from a mesh bag-like material of long fibers impregnated with resin. and a fiber-reinforced resin valve lifter, characterized in that the lower part of the top part and the upper part of the top part made of short fiber-reinforced resin are integrally compression-molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3758986U JPH0515523Y2 (en) | 1986-03-17 | 1986-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3758986U JPH0515523Y2 (en) | 1986-03-17 | 1986-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62150508U JPS62150508U (en) | 1987-09-24 |
| JPH0515523Y2 true JPH0515523Y2 (en) | 1993-04-23 |
Family
ID=30849054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3758986U Expired - Lifetime JPH0515523Y2 (en) | 1986-03-17 | 1986-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0515523Y2 (en) |
-
1986
- 1986-03-17 JP JP3758986U patent/JPH0515523Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62150508U (en) | 1987-09-24 |
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