JP2001303913A - Valve system for internal combustion engine - Google Patents

Valve system for internal combustion engine

Info

Publication number
JP2001303913A
JP2001303913A JP2000127108A JP2000127108A JP2001303913A JP 2001303913 A JP2001303913 A JP 2001303913A JP 2000127108 A JP2000127108 A JP 2000127108A JP 2000127108 A JP2000127108 A JP 2000127108A JP 2001303913 A JP2001303913 A JP 2001303913A
Authority
JP
Japan
Prior art keywords
valve
spring
retainer
internal combustion
combustion engine
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
JP2000127108A
Other languages
Japanese (ja)
Inventor
Haruki Kobayashi
治樹 小林
Sei Abe
聖 阿部
Takeshi Sasa
猛志 佐々
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.)
Fuji Oozx Inc
Original Assignee
Fuji Oozx Inc
Fuji Valve 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 Fuji Oozx Inc, Fuji Valve Co Ltd filed Critical Fuji Oozx Inc
Priority to JP2000127108A priority Critical patent/JP2001303913A/en
Priority to US09/661,713 priority patent/US6293240B1/en
Priority to EP00120383A priority patent/EP1143114B1/en
Priority to DE60026413T priority patent/DE60026413T2/en
Priority to US09/921,468 priority patent/US6311661B1/en
Priority to US09/921,742 priority patent/US6341588B2/en
Publication of JP2001303913A publication Critical patent/JP2001303913A/en
Pending legal-status Critical Current

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  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress the wear of contact surfaces of a valve spring and a spring retainer by regulating the relative rotation between these components. SOLUTION: In this valve system of the internal combustion engine in which the spring retainer 6 having a spring retaining flange 6a is attached to a shaft end of an engine valve 1, and an upper end of the valve spring 4 compressed between the spring retainer 6 and a cylinder head is supported by a lower surface of the spring retaining flange 6a, a downward projecting portion 7 is provided on a part in the circumferential direction on the lower surface of the spring retaining flange 6a, and the projecting portion 7 is located in a recess C between a terminating end of a first turn 4a at the upper end of the valve spring 4 and an upper end of a second turn 4b.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、内燃機関の動弁装
置に係り、特に、バルブスプリングの上端と、それを受
支するスプリングリテーナとの互いの接触面の摩耗を抑
えうるようにした動弁装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve gear for an internal combustion engine, and more particularly to a valve gear capable of suppressing wear of a contact surface between an upper end of a valve spring and a spring retainer supporting the valve spring. It relates to a valve device.

【0002】[0002]

【従来の技術】図4は、従来の内燃機関の動弁装置の一
例を示すもので、エンジンバルブ(1)の上端部には、半
割円筒形をなす1対のコッタ(2)(2)を介して、スプリ
ングリテーナ(以下、リテーナと略称する)(3)が止着さ
れている。
2. Description of the Related Art FIG. 4 shows an example of a conventional valve train for an internal combustion engine. A pair of cotters (2) and (2) having a half-cylindrical shape are provided at the upper end of an engine valve (1). ), A spring retainer (hereinafter abbreviated as a retainer) (3) is fixed.

【0003】リテーナ(3)における上端のばね受けフラ
ンジ(3a)の下面とシリンダヘッド(図示略)との間には、
バルブスプリング(4)が縮設され、エンジンバルブ(1)
は、リテーナ(3)を介して常時上向きに付勢されてい
る。(5)は、エンジンバルブ(1)の軸端に当接している
ロッカアームで、これが回転カム(図示略)により上下に
揺動させられることにより、エンジンバルブ(1)は開閉
される。
[0003] Between the lower surface of the spring receiving flange (3a) at the upper end of the retainer (3) and the cylinder head (not shown),
Valve spring (4) is contracted and engine valve (1)
Is constantly urged upward through the retainer (3). Reference numeral (5) denotes a rocker arm which is in contact with the shaft end of the engine valve (1). The rocker arm is pivoted up and down by a rotating cam (not shown) to open and close the engine valve (1).

【0004】[0004]

【発明が解決しようとする課題】上述のような動弁装置
において、エンジンバルブ(1)の開閉時の振動、あるい
は、バルブスプリング(4)にサージングが発生するなど
すると、エンジンバルブ(1)と実質的に一体をなしてい
るリテーナ(3)におけるばね受けフランジ(3a)と、バル
ブスプリング(4)とが相対回転し、それら互いの接触面
が摩耗する。特に、軽量化を目的としたアルミニウム合
金製のリテーナ(3)では、リテーナ(3)側の摩耗が大き
くなる。
In the above-described valve train, when the engine valve (1) vibrates at the time of opening and closing, or when the valve spring (4) undergoes surging, etc., the engine valve (1) and the valve spring (4) are disconnected. The spring receiving flange (3a) and the valve spring (4) of the retainer (3), which are substantially integral, rotate relative to each other, and their contact surfaces are worn. In particular, in the case of a retainer (3) made of an aluminum alloy for the purpose of weight reduction, wear on the retainer (3) side is increased.

【0005】この摩耗量が大きくなると、バルブスプリ
ング(4)のセット荷重が小さくなって、そのサージング
限界回転数が低下し、エンジン性能に悪影響を及ぼした
り、摩耗を促進させたりすることがある。本発明は、上
記問題点に鑑みてなされたもので、リテーナとバルブス
プリングとが相対回転するのを規制することにより、そ
れら互いの接触面の摩耗を最小限に抑えうるようにした
内燃機関の動弁装置を提供することを目的としている。
[0005] When the amount of wear increases, the set load of the valve spring (4) decreases, and the surging limit rotational speed decreases, which may adversely affect engine performance or accelerate wear. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been made in consideration of an internal combustion engine in which a retainer and a valve spring are restricted from rotating relative to each other so that wear of a contact surface between them can be minimized. It is intended to provide a valve train.

【0006】[0006]

【課題を解決するための手段】本発明によると、上記課
題は、次のようにして解決される。 (1) エンジンバルブの軸端部に、ばね受けフランジを
有するスプリングリテーナを止着し、このスプリングリ
テーナとシリンダヘッドとの間に縮設されたバルブスプ
リングの上端を、前記ばね受けフランジの下面により受
支してなる内燃機関の動弁装置において、前記ばね受け
フランジの下面における円周方向の一部に、下向きの突
部を設け、この突部を、前記バルブスプリング上端の1
巻き目の終端と2巻き目の上端との間の凹部内に位置さ
せる。
According to the present invention, the above-mentioned problem is solved as follows. (1) A spring retainer having a spring receiving flange is fastened to the shaft end of the engine valve, and the upper end of the valve spring contracted between the spring retainer and the cylinder head is fixed by the lower surface of the spring receiving flange. In a valve operating device for an internal combustion engine which is supported, a downward projecting portion is provided on a part of a lower surface of the spring receiving flange in a circumferential direction, and the projecting portion is provided at one end of an upper end of the valve spring.
It is located in the recess between the end of the turn and the upper end of the second turn.

【0007】(2) 上記(1)項において、突部の下面
を、バルブスプリングの2巻き目の傾斜角度とほぼ同じ
角度の傾斜面とする。
(2) In the above item (1), the lower surface of the projection is formed as an inclined surface having an angle substantially equal to the inclined angle of the second winding of the valve spring.

【0008】(3) 上記(1)または(2)項において、ス
プリングリテーナが軽合金製のものにおいて、それより
も硬質の材料により突部を形成する。
(3) In the above item (1) or (2), when the spring retainer is made of a light alloy, the protrusion is formed of a harder material.

【0009】[0009]

【発明の実施の形態】以下、本発明の実施形態を、図面
に基づいて説明する。図1及び図2は、本発明の第1の
実施形態を示すもので、スプリングリテーナ(6)は、ア
ルミニウム合金により形成され、従来と同様、エンジン
バルブ(1)の軸端部に1対のコッタ(2)(2)をもって止
着されている。
Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention, in which a spring retainer (6) is formed of an aluminum alloy, and a pair of spring retainers is provided at a shaft end portion of an engine valve (1) as in the prior art. It is fastened with cotters (2) and (2).

【0010】リテーナ(6)におけるばね受けフランジ(6
a)の下面の円周方向の一部には、バルブスプリング(4)
の最上端の1巻き目(4a)の終端と2巻き目(4b)の上端と
の間に形成された凹部(C)内に挿入可能な突部(7)が、
リテーナ(6)と一体的に下向きに突設されている。
[0010] The spring receiving flange (6) of the retainer (6).
Part of the lower surface of a) in the circumferential direction is a valve spring (4).
A protrusion (7) that can be inserted into a concave portion (C) formed between the end of the first turn (4a) at the uppermost end and the upper end of the second turn (4b),
It protrudes downward integrally with the retainer (6).

【0011】上記突部(7)の上下寸法及び円周方向の幅
は、次のように設定してある。図1に示すように、リテ
ーナ(6)を、その突部(7)がバルブスプリング(4)の終
端部の凹部(C)内に位置するようにして組付け、かつ突
部(7)の右側面をバルブスプリング(4)の1巻き目(4a)
の終端と当接させた際に、突部(7)の左方の下端角部
が、左上がりに傾斜する2巻き目(4b)の上端面と近接す
る寸法としてある。
The vertical dimension and the circumferential width of the projection (7) are set as follows. As shown in FIG. 1, the retainer (6) is assembled such that the projection (7) is located in the recess (C) at the end of the valve spring (4), and the projection (7) is The first side of the valve spring (4) on the right side (4a)
When it is brought into contact with the end of the second winding (4b), the left lower corner of the projection (7) is close to the upper end surface of the second turn (4b) inclined upward and leftward.

【0012】この第1の実施形態の動弁装置において、
エンジンの運転時にバルブスプリング(4)とリテーナ
(6)とが軸線回りに相対回転しようとすると、突部(7)
の右端面と1巻き目(4a)の終端同士、及び左方の下端角
部と2巻き目の(4b)の上端面同士がそれぞれ当接する。
In the valve gear of the first embodiment,
Valve spring (4) and retainer during engine operation
When (6) attempts to rotate relative to the axis, a protrusion (7)
The right end face and the end of the first turn (4a) are in contact with each other, and the left bottom corner and the upper end face of the second turn (4b) are in contact with each other.

【0013】従って、バルブスプリング(4)の上端とリ
テーナ(6)のばね受けフランジ(6a)の下面との摺動摩擦
が殆どなくなり、それら互いの接触面の摩耗、特に、ア
ルミニウム合金よりなるリテーナ(6)側の摩耗が極めて
小さくなる。
Therefore, there is almost no sliding friction between the upper end of the valve spring (4) and the lower surface of the spring receiving flange (6a) of the retainer (6). 6) Wear on the side is extremely small.

【0014】その結果、バルブスプリング(4)のセット
荷重が小さくなって、そのサージング限界回転数が低下
するのが防止され、エンジン性能は長期間に亘り良好状
態に維持される。図3は、本発明の第2の実施形態を、
要部を拡大して示すもので、突部(7)の下面を、バルブ
スプリング(4)の2巻き目(4b)の傾斜角度とほぼ同じ角
度の傾斜面としてある。
As a result, the set load of the valve spring (4) is reduced, so that the surging limit rotational speed is prevented from lowering, and the engine performance is maintained in a good state for a long period of time. FIG. 3 illustrates a second embodiment of the present invention,
The main part is shown in an enlarged manner, and the lower surface of the projection (7) is formed as an inclined surface having substantially the same angle as the inclination angle of the second turn (4b) of the valve spring (4).

【0015】このようにすると、バルブスプリング(4)
とリテーナ(6)とが矢印方向に相対回転した際、突部
(7)の下面とバルブスプリング(4)の2巻き目(4b)の上
端との接触面積が増大し、面圧が低下するので、それら
互いの接触面の摩耗を小さくしうる。
By doing so, the valve spring (4)
When the retainer (6) and the retainer (6) relatively rotate in the
Since the contact area between the lower surface of (7) and the upper end of the second turn (4b) of the valve spring (4) increases, and the surface pressure decreases, the abrasion of the contact surfaces between them can be reduced.

【0016】本発明は、上記実施形態に限定されるもの
ではない。上記実施形態では、突部(7)をリテーナ(6)
と一体的に連設しているが、別体に形成した突部(7)
を、溶接やねじ等によりリテーナ(6)のばね受けフラン
ジ(6a)に固着するようにしてもよい。
The present invention is not limited to the above embodiment. In the above embodiment, the protrusion (7) is connected to the retainer (6).
Projecting part (7) which is formed integrally with
May be fixed to the spring receiving flange (6a) of the retainer (6) by welding, screws, or the like.

【0017】この際、突部(7)の材質に、硬質の鋼材や
軽量のチタン材等を用いてもよく、このようにすると、
耐摩耗性を向上させることができる。本発明は、鉄製の
リテーナを備える動弁装置にも適用しうることは言うま
でもない。
At this time, a hard steel material, a lightweight titanium material, or the like may be used for the material of the projection (7).
Wear resistance can be improved. It goes without saying that the present invention is also applicable to a valve train having an iron retainer.

【0018】[0018]

【発明の効果】請求項1記載の発明によれば、ばね受け
フランジの下面に設けた突部により、バルブスプリング
とスプリングリテーナとの相対回転が規制されるため、
それら互いの接触面の摩耗を最小限に抑えることができ
る。
According to the first aspect of the present invention, the relative rotation between the valve spring and the spring retainer is restricted by the projection provided on the lower surface of the spring receiving flange.
Wear of these contact surfaces can be minimized.

【0019】また、接触面の摩耗が増大して、バルブス
プリングのセット荷重が小さくなり、そのサージング限
界回転数が低下することもなくなるので、エンジン性能
は長期間に亘り維持される。
In addition, the wear of the contact surface increases, the set load of the valve spring decreases, and the surging limit rotational speed does not decrease. Therefore, the engine performance is maintained for a long time.

【0020】請求項2記載の発明によれば、突部の下面
とバルブスプリングの2巻き目の上端との接触面積が増
大し、面圧が低下するため、それら互いの接触面の摩耗
を小さくしうる。
According to the second aspect of the present invention, the contact area between the lower surface of the projection and the upper end of the second turn of the valve spring increases, and the surface pressure decreases. Can.

【0021】請求項3記載の発明によれば、スプリング
リテーナをアルミニウム合金等により形成しても、突部
は硬質であるため、その摩耗を抑えることができる。
According to the third aspect of the present invention, even if the spring retainer is formed of an aluminum alloy or the like, since the projection is hard, its wear can be suppressed.

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

【図1】本発明の第1の実施形態を示す正面図である。FIG. 1 is a front view showing a first embodiment of the present invention.

【図2】同じく、図1のII−II線の縦断側面図である。FIG. 2 is a vertical sectional side view taken along the line II-II of FIG.

【図3】同じく、第2の実施形態を示す要部の拡大正面
図である。
FIG. 3 is an enlarged front view of a main part according to the second embodiment.

【図4】従来の動弁機構を示す中央縦断正面図である。FIG. 4 is a front view of a central vertical section showing a conventional valve mechanism.

【符号の説明】[Explanation of symbols]

(1)エンジンバルブ (2)コッタ (4)バルブスプリング (4a)1巻き目 (4b)2巻き目 (6)スプリングリテーナ (6a)ばね受けフランジ (7)突部 (C)凹部 (1) Engine valve (2) Cotta (4) Valve spring (4a) First turn (4b) Second turn (6) Spring retainer (6a) Spring receiving flange (7) Projection (C) Recess

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 エンジンバルブの軸端部に、ばね受けフ
ランジを有するスプリングリテーナを止着し、このスプ
リングリテーナとシリンダヘッドとの間に縮設されたバ
ルブスプリングの上端を、前記ばね受けフランジの下面
により受支してなる内燃機関の動弁装置において、 前記ばね受けフランジの下面における円周方向の一部
に、下向きの突部を設け、この突部を、前記バルブスプ
リング上端の1巻き目の終端と2巻き目の上端との間の
凹部内に位置させたことを特徴とする内燃機関の動弁装
置。
1. A spring retainer having a spring receiving flange is fixed to a shaft end of an engine valve, and an upper end of a valve spring contracted between the spring retainer and a cylinder head is fixed to the spring receiving flange. In a valve operating device for an internal combustion engine supported by a lower surface, a downwardly projecting portion is provided on a part of the lower surface of the spring receiving flange in a circumferential direction, and the downwardly projecting portion is formed by a first turn of the upper end of the valve spring. A valve train for an internal combustion engine, wherein the valve train is located in a concave portion between an end of the valve and an upper end of a second winding.
【請求項2】 突部の下面を、バルブスプリングの2巻
き目の傾斜角度とほぼ同じ角度の傾斜面とした請求項1
記載の内燃機関の動弁装置。
2. The lower surface of the projection is formed as an inclined surface having substantially the same angle as the inclination angle of the second turn of the valve spring.
A valve gear for an internal combustion engine according to the above.
【請求項3】 スプリングリテーナが軽合金製のものに
おいて、それよりも硬質の材料により突部を形成した請
求項1または2記載の内燃機関の動弁装置。
3. The valve train for an internal combustion engine according to claim 1, wherein the spring retainer is made of a light alloy, and the protrusion is formed of a harder material.
JP2000127108A 2000-03-28 2000-04-27 Valve system for internal combustion engine Pending JP2001303913A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2000127108A JP2001303913A (en) 2000-04-27 2000-04-27 Valve system for internal combustion engine
US09/661,713 US6293240B1 (en) 2000-03-28 2000-09-14 Valve spring retainer and a valve operating mechanism
EP00120383A EP1143114B1 (en) 2000-03-28 2000-09-18 Valve spring retainer and a valve operating mechanism
DE60026413T DE60026413T2 (en) 2000-03-28 2000-09-18 Valve spring attachment and valve train mechanism
US09/921,468 US6311661B1 (en) 2000-03-28 2001-08-03 Valve spring retainer and a valve operating mechanism
US09/921,742 US6341588B2 (en) 2000-03-28 2001-08-03 Valve spring retainer and a valve operating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000127108A JP2001303913A (en) 2000-04-27 2000-04-27 Valve system for internal combustion engine

Publications (1)

Publication Number Publication Date
JP2001303913A true JP2001303913A (en) 2001-10-31

Family

ID=18636763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000127108A Pending JP2001303913A (en) 2000-03-28 2000-04-27 Valve system for internal combustion engine

Country Status (1)

Country Link
JP (1) JP2001303913A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257401A (en) * 2008-04-15 2009-11-05 Nok Corp Sealing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257401A (en) * 2008-04-15 2009-11-05 Nok Corp Sealing device

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