JP2016188615A - Engine valve device - Google Patents

Engine valve device Download PDF

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JP2016188615A
JP2016188615A JP2015069333A JP2015069333A JP2016188615A JP 2016188615 A JP2016188615 A JP 2016188615A JP 2015069333 A JP2015069333 A JP 2015069333A JP 2015069333 A JP2015069333 A JP 2015069333A JP 2016188615 A JP2016188615 A JP 2016188615A
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valve
cap
valve cap
engine
valve device
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Inventor
洋樹 尾曽
Hiroki Oso
洋樹 尾曽
宮▲崎▼　学
Manabu Miyazaki
学 宮▲崎▼
長井　健太郎
Kentaro Nagai
健太郎 長井
正 中野
Tadashi Nakano
正 中野
山口　隆志
Takashi Yamaguchi
隆志 山口
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Kubota Corp
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Kubota Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an engine valve device capable of suppressing a wear of a valve surface and a valve seat.SOLUTION: An engine valve device is equipped with a poppet valve 1 carrying out intake or exhaust and a valve cap 2. The poppet valve 1 is equipped with a valve head 1a and a valve shaft 1b, and the valve cap 2 is fitted with an end portion of the valve shaft 1b. The valve cap 2 is loosely fitted at an end portion 1c of the valve shaft 1b so as to rotate, and a peripheral wall 4 of the valve cap 2 is equipped with an oil replenish port 4a. The oil replenish port 4a penetrates the peripheral wall 4 of the valve cap 2, and an outer peripheral opening 4b of the oil replenish port 4a is opened on an outer peripheral surface 4c of the peripheral wall 4.SELECTED DRAWING: Figure 1

Description

本発明は、エンジンの弁装置に関し、詳しくは、弁面と弁シートの磨耗を抑制することができるエンジンの弁装置に関する。   The present invention relates to an engine valve device, and more particularly, to an engine valve device capable of suppressing wear of a valve surface and a valve seat.

従来、吸気または排気を行うポペット弁と弁キャップを備え、ポペット弁は弁頭と弁軸を備え、弁キャップは弁軸の端部に嵌合されているエンジンの弁装置がある(例えば、特許文献１参照)。   Conventionally, there is a valve device for an engine that includes a poppet valve that performs intake or exhaust and a valve cap, the poppet valve includes a valve head and a valve shaft, and the valve cap is fitted to the end of the valve shaft (for example, a patent Reference 1).

この種の弁装置によれば、弁軸の端部の磨耗を弁キャップで抑制することができる利点がある。   According to this type of valve device, there is an advantage that wear of the end of the valve shaft can be suppressed by the valve cap.

しかし、特許文献１のものでは、弁キャップは弁軸の端部に圧入固定されているため、問題がある。   However, in the thing of patent document 1, since the valve cap is press-fitted and fixed to the edge part of the valve shaft, there exists a problem.

特開２０１２−１２２３７２号公報(図１，図２参照)JP 2012-122372 A (see FIGS. 1 and 2)

《問題点》 弁面と弁シートの磨耗が促進されるおそれがある。
特許文献１のものでは、弁キャップは弁軸の端部に圧入固定されているため、ポペット弁と弁キャップが常に一体で回転し、弁キャップへのロッカアームの当接箇所が弁キャップの中心からオフセットしている場合には、ポペット弁が頻繁に回転し、弁面と弁シートが磨耗しやすい。 <Problem> Wear of the valve surface and the valve seat may be accelerated.
In Patent Document 1, since the valve cap is press-fitted and fixed to the end of the valve shaft, the poppet valve and the valve cap always rotate integrally, and the contact point of the rocker arm to the valve cap is from the center of the valve cap. When offset, the poppet valve rotates frequently and the valve surface and the valve seat are likely to wear.

解決課題 弁面等の磨耗抑制
本発明の課題は、弁面と弁シートの磨耗を抑制することができるエンジンの弁装置を提供することにある。 Problems to be Solved by the Invention An object of the present invention is to provide an engine valve device that can suppress wear of a valve face and a valve seat.

本発明の発明者らは、研究の結果、弁キャップを弁軸の端部に回転可能に遊嵌すると、ポペット軸の回転が減少し、弁面と弁シートの磨耗を抑制することができることを発見し、この発明に至った。   As a result of research, the inventors of the present invention have found that if the valve cap is loosely fitted to the end of the valve shaft, rotation of the poppet shaft is reduced, and wear of the valve surface and the valve seat can be suppressed. Discovered and led to this invention.

請求項１に係る発明の発明特定事項は、次の通りである。
図１(Ａ)，図４(Ａ)に例示するように、吸気または排気を行うポペット弁(１)と弁キャップ(２)を備え、ポペット弁(１)は弁頭(１ａ)と弁軸(１ｂ)を備え、弁キャップ(２)は弁軸(１ｂ)の端部(１ｃ)に嵌合されている、エンジンの弁装置において、
図１(Ａ)，図４(Ａ)に例示するように、弁キャップ(２)は、弁軸(１ｂ)の端部(１ｃ)に回転可能に遊嵌され、
図１(Ｂ)〜(Ｅ)に例示するように、弁キャップ(２)の周壁(４)はオイル補給口(４ａ)を備え、オイル補給口(４ａ)は弁キャップ(２)の周壁(４)を貫通し、オイル補給口(４ａ)の外周開口(４ｂ)は周壁(４)の外周面(４ｃ)で開口されている、ことを特徴とするエンジンの弁装置。 Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIGS. 1 (A) and 4 (A), a poppet valve (1) for performing intake or exhaust and a valve cap (2) are provided. The poppet valve (1) includes a valve head (1a) and a valve shaft. (1b), and the valve cap (2) is fitted to the end (1c) of the valve shaft (1b).
As illustrated in FIGS. 1 (A) and 4 (A), the valve cap (2) is loosely fitted to the end (1c) of the valve shaft (1b),
As illustrated in FIGS. 1B to 1E, the peripheral wall (4) of the valve cap (2) is provided with an oil supply port (4a), and the oil supply port (4a) is a peripheral wall of the valve cap (2) ( 4) An engine valve device characterized in that the outer opening (4b) of the oil replenishing port (4a) is opened at the outer peripheral surface (4c) of the peripheral wall (4).

(請求項１に係る発明)
請求項１に係る発明は、次の効果を奏する。
《効果》 弁面と弁シートの磨耗を抑制することができる。
図１(Ａ)，図４(Ａ)に例示するように、弁キャップ(２)は、弁軸(１ｂ)の端部(１ｃ)に回転可能に遊嵌されているので、弁キャップ(２)に対するロッカアーム(５)の当接箇所が弁キャップ(２)の中心からオフセットしている場合でも、弁軸(１ｂ)の端部(１)で弁キャップ(２)が回転する分だけ、ポペット弁(１)の回転が減少し、弁面(１ｄ)と弁シート(６)の磨耗を抑制することができる。 (Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect> Wear of the valve surface and the valve seat can be suppressed.
As illustrated in FIGS. 1 (A) and 4 (A), the valve cap (2) is rotatably fitted to the end portion (1c) of the valve shaft (1b). ) Even if the location where the rocker arm (5) is in contact with the valve cap (2) is offset from the center of the valve cap (2), the poppet is rotated by the amount of rotation of the valve cap (2) at the end (1) of the valve shaft (1b) The rotation of the valve (1) is reduced, and wear of the valve surface (1d) and the valve seat (6) can be suppressed.

《効果》 弁軸の端部と弁キャップの磨耗を抑制することができる。
図１(Ｂ)〜(Ｅ)，図４(Ｂ)〜(Ｅ)に例示するように、弁キャップ(２)の周壁(４)はオイル補給口(４ａ)を備え、オイル補給口(４ａ)は弁キャップ(２)の周壁(４)を貫通し、オイル補給口(４ａ)の外周開口(４ｂ)は周壁(４)の外周面(４ｃ)で開口されているので、弁キャップ(２)周辺のオイルミストや、弁キャップ(２)周辺で凝縮したオイルが、オイル補給口(４ａ)から弁キャップ(２)内に補給され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制することができる。 <Effect> Wear of the end of the valve shaft and the valve cap can be suppressed.
As illustrated in FIGS. 1 (B) to (E) and FIGS. 4 (B) to (E), the peripheral wall (4) of the valve cap (2) includes an oil supply port (4a), and an oil supply port (4a) is provided. ) Penetrates the peripheral wall (4) of the valve cap (2), and the outer peripheral opening (4b) of the oil supply port (4a) is opened by the outer peripheral surface (4c) of the peripheral wall (4). ) Peripheral oil mist and oil condensed around the valve cap (2) are supplied into the valve cap (2) from the oil supply port (4a), and the end (1c) of the valve shaft (1b) and the valve cap The sliding surface of (2) is lubricated, and wear of the end (1c) of the valve shaft (1b) and the valve cap (2) can be suppressed.

(請求項２に係る発明)
請求項２に係る発明は、請求項１に係る発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗を抑制する機能が高まる。
図１(Ｂ)〜(Ｅ)，図４(Ｂ)〜(Ｅ)に例示するように、オイル補給口(４ａ)は弁キャップ(２)の中心軸線(２ａ)の軸長方向に沿っているので、オイル補給口(４ａ)から弁キャップ(２)内に補給されたオイルミストや凝縮オイルが、オイル補給口(４ａ)を経て、図４(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面の広い範囲に速やかに供給され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 (Invention of Claim 2)
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> The function to suppress wear of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 1 (B) to (E) and FIGS. 4 (B) to (E), the oil supply port (4a) extends along the axial length direction of the central axis (2a) of the valve cap (2). Therefore, oil mist or condensed oil replenished from the oil replenishing port (4a) into the valve cap (2) passes through the oil replenishing port (4a) and is then removed from the valve shaft (1b) illustrated in FIG. 4 (A). This is quickly supplied to a wide range of sliding surfaces of the end (1c) and the valve cap (2), and the function of suppressing wear of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

(請求項３に係る発明)
請求項３に係る発明は、請求項２に係る発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図１(Ｂ)〜(Ｅ)，図４(Ｂ)〜(Ｅ)に例示するように、弁キャップ(２)の周壁(４)は複数のオイル補給口(４ａ)を備えているので、多くのオイルミストや凝縮オイルが複数のオイル補給口(４ａ)を経て、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面に案内され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 (Invention of Claim 3)
The invention according to claim 3 has the following effect in addition to the effect of the invention according to claim 2.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 1B to 1E and FIGS. 4B to 4E, the peripheral wall (4) of the valve cap (2) includes a plurality of oil supply ports (4a). Many oil mists and condensed oil are guided through the plurality of oil supply ports (4a) to the end portion (1c) of the valve shaft (1b) shown in FIG. 1 (A) and the sliding surface of the valve cap (2). Thus, the function of suppressing wear of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

(請求項４に係る発明)
請求項４に係る発明は、請求項３に記載された発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図１(Ｃ)(Ｄ)，図４(Ｃ)(Ｄ)に例示するように、弁キャップ(２)の中心軸線(２ａ)と平行な向きに見て、一対のオイル補給口(４ａ)(４ａ)は、弁キャップ(２)の端壁(３)の中央部(３ｃ)を間に挟んで、相互反対側に配置されているので、各オイル補給孔(３ａ)から弁キャップ(２)内に補給されたオイルが相互反対側に均等に分配され、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が偏りなく潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 (Invention of Claim 4)
The invention according to claim 4 has the following effect in addition to the effect of the invention described in claim 3.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 1 (C) (D) and 4 (C) (D), a pair of oil replenishing ports (4a) when viewed in a direction parallel to the central axis (2a) of the valve cap (2). (4a) is disposed on the opposite side of the center portion (3c) of the end wall (3) of the valve cap (2), so that the valve cap (2 ) Is replenished evenly to the opposite sides, and the end (1c) and the valve cap (2) of the valve shaft (1b) illustrated in FIG. The wear suppressing function of the end (1c) and the valve cap (2) of (1b) is enhanced.

(請求項５に係る発明)
請求項５に係る発明は、請求項１から請求項４のいずれかに記載された発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図１(Ｂ)〜(Ｅ)，図４(Ｂ)〜(Ｅ)に例示するように、弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は下端開口(４ｅ)を備え、下端開口(４ｅ)は周壁(４)の下面(４ｆ)で開口されているので、図１(Ａ)に示す弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面で発生した磨耗粉が、オイルで洗い流され、オイル補給口(４ａ)を経て、オイル補給口(４ａ)の下端開口(４ｅ)から速やかに流出し、磨耗粉による新たな磨耗が抑制され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 (Invention according to claim 5)
The invention according to claim 5 has the following effects in addition to the effects of the invention described in any one of claims 1 to 4.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 1 (B) to (E) and FIGS. 4 (B) to (E), the valve cap (2) has the end wall (3) on the upper side, and the oil supply port (4a) has a lower end opening. (4e), and the lower end opening (4e) is opened at the lower surface (4f) of the peripheral wall (4). Therefore, the end (1c) of the valve shaft (1b) shown in FIG. The wear powder generated on the sliding surface of 2) is washed away with oil, quickly flows out from the lower end opening (4e) of the oil supply port (4a) through the oil supply port (4a), and is newly added by the wear powder. Wear is suppressed, and the function of suppressing wear of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

(請求項６に係る発明)
請求項６に係る発明は、請求項１から請求項５のいずれかに記載された発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図１(Ｂ)〜(Ｅ)，図４(Ｂ)〜(Ｅ)に例示するように、弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は上端開口(４ｄ)を備え、上端開口(４ｄ)は端壁(３)の上面(３ａ)で開口されているので、弁キャップ(２)の端壁(３)の上面(３ａ)で凝縮した多くの凝縮オイルが上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 (Invention of Claim 6)
The invention according to claim 6 has the following effects in addition to the effects of the invention described in any one of claims 1 to 5.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 1 (B) to (E) and FIGS. 4 (B) to (E), the valve cap (2) has the end wall (3) on the upper side, and the oil supply port (4a) has an upper end opening. (4d), and the upper end opening (4d) is opened at the upper surface (3a) of the end wall (3), so that a large amount of condensation has occurred at the upper surface (3a) of the end wall (3) of the valve cap (2). Condensed oil flows into the oil supply port (4a) from the upper end opening (4d), the end (1c) of the valve shaft (1b) and the valve cap (2) illustrated in FIG. The wear suppressing function of the end (1c) and the valve cap (2) of (1b) is enhanced.

(請求項７に係る発明)
請求項７に係る発明は、請求項６に記載された発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図４(Ｂ)〜(Ｅ)に例示するように、端壁(３)はオイル溜め凹部(３ｂ)を備え、オイル溜め凹部(３ｂ)はオイル補給口(４ａ)の上端開口(４ｄ)と連通しているので、弁キャップ(２)の端壁(３)の上面(３ａ)で凝縮した多くの凝縮オイルがオイル溜め凹部(３ｂ)に溜まり、上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 (Invention of Claim 7)
The invention according to claim 7 has the following effect in addition to the effect of the invention described in claim 6.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 4B to 4E, the end wall (3) includes an oil reservoir recess (3b), and the oil reservoir recess (3b) is connected to the upper end opening (4d) of the oil supply port (4a). Because of the communication, a large amount of condensed oil condensed on the upper surface (3a) of the end wall (3) of the valve cap (2) is collected in the oil reservoir recess (3b), and the oil replenishing port (4a) from the upper end opening (4d). ), The end (1c) of the valve shaft (1b) and the valve cap (2) illustrated in FIG. 1 (A) are lubricated, and the end (1c) of the valve shaft (1b) and the valve cap (2 ) Wear suppression function increases.

(請求項８に係る発明)
請求項８に係る発明は、請求項７に記載された発明の効果に加え、次の効果を奏する。
《効果》 弁軸の端部と弁キャップの磨耗抑制機能が高まる。
図４(Ｂ)〜(Ｅ)に例示するように、オイル溜め凹部(３ｂ)は端壁(３)の中央部を取り囲む円環状の溝で形成されているので、端壁(３)の上面(３ａ)の広い領域で凝縮した多くの凝縮オイルがオイル溜め凹部(３ｂ)に溜まり、上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 (Invention of Claim 8)
The invention according to claim 8 has the following effect in addition to the effect of the invention described in claim 7.
<Effect> The wear suppression function of the end of the valve shaft and the valve cap is enhanced.
As illustrated in FIGS. 4B to 4E, the oil reservoir recess (3b) is formed by an annular groove surrounding the central portion of the end wall (3), and thus the upper surface of the end wall (3). A large amount of condensed oil condensed in a wide area (3a) accumulates in the oil reservoir recess (3b), flows into the oil supply port (4a) from the upper end opening (4d), and the valve shaft illustrated in FIG. The end portion (1c) of 1b) and the valve cap (2) are lubricated, and the wear suppression function of the end portion (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

本発明の第１実施形態に係るエンジンの弁装置を説明する図で、図１(Ａ)は弁装置の正面図、図１(Ｂ)は弁装置で用いる弁キャップの正面図、図１(Ｃ)は弁キャップの平面図、図１(Ｄ)は弁キャップの底面図、図１(Ｅ)は図１(Ｃ)のＥ−Ｅ線断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the valve apparatus of the engine which concerns on 1st Embodiment of this invention, FIG. 1 (A) is a front view of a valve apparatus, FIG.1 (B) is a front view of the valve cap used with a valve apparatus, FIG. 1C is a plan view of the valve cap, FIG. 1D is a bottom view of the valve cap, and FIG. 1E is a cross-sectional view taken along line EE of FIG. 本発明の第１実施形態に係る弁装置を用いたエンジンの縦断正面図である。It is a vertical front view of an engine using a valve device concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係る弁装置を用いたエンジンの一部縦断側面図である。1 is a partially longitudinal side view of an engine using a valve device according to a first embodiment of the present invention. 本発明の第２実施形態に係るエンジンの弁装置を説明する図で、図４(Ａ)は弁装置の正面図、図４(Ｂ)は弁装置で用いる弁キャップの正面図、図４Ｃ)は弁キャップの平面図、図４(Ｄ)は弁キャップの底面図、図４(Ｅ)は図４(Ｃ)のＥ−Ｅ線断面図である。FIG. 4A is a front view of a valve device, FIG. 4B is a front view of a valve cap used in the valve device, and FIG. 4C is a diagram illustrating an engine valve device according to a second embodiment of the present invention. 4D is a plan view of the valve cap, FIG. 4D is a bottom view of the valve cap, and FIG. 4E is a cross-sectional view taken along line EE of FIG. 4C.

図１〜図３は本発明の第１実施形態に係るエンジンの弁装置を説明する図、図４は本発明の第２実施形態に係るエンジンの弁装置を説明する図であり、各実施形態では、立形の直列２気筒ディーゼルエンジンの弁装置について説明する。   1 to 3 are diagrams for explaining an engine valve device according to a first embodiment of the present invention, and FIG. 4 is a diagram for explaining an engine valve device according to a second embodiment of the present invention. Now, a valve device for a vertical in-line two-cylinder diesel engine will be described.

まず、図１〜図３に示す第１実施形態について説明する。
エンジンの概要は、次の通りである。
図３に示すように、シリンダブロック(７)の上部にシリンダヘッド(８)が組み付けられ、シリンダヘッド(８)の上部にシリンダヘッドカバー(９)が組み付けられている。シリンダブロック(７)のクランクケース(７ａ)にクランク軸(１０)が収容され、クランク軸(１０)の架設方向を前後方向として、その一方を前、他方を後として、シリンダブロック(７)の前部に調時伝動ケース(１１)とウォータポンプ(１２)が組み付けられ、ウォータポンプ(１２)の前部にエンジン冷却ファン(１３)が取り付けられ、ウォータポンプ(１２)とエンジン冷却ファン(１３)がファンベルト(１４)を介してクランク軸(１０)で駆動される。エンジン冷却ファン(１３)の前方にはラジエータ(１５)が配置されている。
シリンダブロック(７)の後部にはフライホイール(１６)が配置されている。
シリンダブロック(７)の下部にはオイルパン(１７)が組み付けられている。 First, the first embodiment shown in FIGS. 1 to 3 will be described.
The outline of the engine is as follows.
As shown in FIG. 3, the cylinder head (8) is assembled to the upper part of the cylinder block (7), and the cylinder head cover (9) is assembled to the upper part of the cylinder head (8). A crankshaft (10) is accommodated in a crankcase (7a) of the cylinder block (7). The installation direction of the crankshaft (10) is the front-rear direction, one of which is the front and the other is the rear. A timing transmission case (11) and a water pump (12) are assembled to the front, an engine cooling fan (13) is attached to the front of the water pump (12), and the water pump (12) and the engine cooling fan (13 ) Is driven by the crankshaft (10) through the fan belt (14). A radiator (15) is disposed in front of the engine cooling fan (13).
A flywheel (16) is disposed at the rear of the cylinder block (7).
An oil pan (17) is assembled to the lower part of the cylinder block (7).

図２に示すように、クランク軸(１０)の架設方向と平行な向きに見て、水平なエンジン幅方向を横方向として、シリンダヘッド(８)の横一側に吸気マニホルド(１８)が組み付けられ、横他側に排気マニホルド(１９)が組み付けられている。
シリンダヘッドカバー(９)内には、吸気及び排気の弁装置(２０)が収容され、この弁装置(２０)が動弁装置(２１)で駆動される。動弁装置(２１)は、動弁カム(２２)とタペット(２３)とプッシュロッド(２４)とロッカアーム(５)を備えている。 As shown in FIG. 2, the intake manifold (18) is assembled on one side of the cylinder head (8) with the horizontal engine width direction as the lateral direction when viewed in a direction parallel to the installation direction of the crankshaft (10). An exhaust manifold (19) is assembled on the other side.
An intake and exhaust valve device (20) is accommodated in the cylinder head cover (9), and this valve device (20) is driven by the valve operating device (21). The valve gear (21) includes a valve cam (22), a tappet (23), a push rod (24), and a rocker arm (5).

弁装置(２０)の概要は、次の通りである。
図１(Ａ)に示すように、吸気または排気を行うポペット弁(１)と弁キャップ(２)を備え、ポペット弁(１)は弁頭(１ａ)と弁軸(１ｂ)を備え、弁キャップ(２)は弁軸(１ｂ)の端部(１ｃ)に嵌合されている。
このため、弁軸(１ｂ)の端部(１ｃ)の磨耗を弁キャップ(２)で抑制することができる。
弁軸(１ｂ)の端部(１ｃ)は弁軸(１ｂ)の上端部である。 The outline of the valve device (20) is as follows.
As shown in FIG. 1A, a poppet valve (1) for performing intake or exhaust and a valve cap (2) are provided, and the poppet valve (1) is provided with a valve head (1a) and a valve shaft (1b). The cap (2) is fitted to the end (1c) of the valve shaft (1b).
For this reason, wear of the end (1c) of the valve shaft (1b) can be suppressed by the valve cap (2).
The end (1c) of the valve shaft (1b) is the upper end of the valve shaft (1b).

図１(Ａ)に示すように、弁キャップ(２)は、弁軸(１ｂ)の端部(１ｃ)に回転可能に遊嵌されている。
図１(Ｂ)〜(Ｅ)に示すように、弁キャップ(２)の周壁(４)はオイル補給口(４ａ)を備え、オイル補給口(４ａ)は弁キャップ(２)の周壁(４)を貫通し、オイル補給口(４ａ)の外周開口(４ｂ)は周壁(４)の外周面(４ｃ)で開口されている。
このため、弁キャップ(２)周辺のオイルミストや、弁キャップ(２)周辺で凝縮した凝縮オイルが、オイル補給口(４ａ)から弁キャップ(２)内に補給され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制することができる。弁キャップ(２)は、端壁(３)が円形、周壁(４)が円筒形で、端壁(３)を天井壁とする伏せた碗形に形成されている。 As shown in FIG. 1A, the valve cap (2) is loosely fitted to the end (1c) of the valve shaft (1b) so as to be rotatable.
As shown in FIGS. 1B to 1E, the peripheral wall (4) of the valve cap (2) is provided with an oil supply port (4a), and the oil supply port (4a) is a peripheral wall (4) of the valve cap (2). ) And the outer peripheral opening (4b) of the oil supply port (4a) is opened at the outer peripheral surface (4c) of the peripheral wall (4).
Therefore, oil mist around the valve cap (2) and condensed oil condensed around the valve cap (2) are replenished into the valve cap (2) from the oil replenishment port (4a), and the valve shaft (1b) The sliding surfaces of the end (1c) and the valve cap (2) are lubricated, and wear of the end (1c) of the valve shaft (1b) and the valve cap (2) can be suppressed. The valve cap (2) is formed in the shape of a saddle with the end wall (3) being circular, the peripheral wall (4) being cylindrical, and the end wall (3) being a ceiling wall.

図１(Ｂ)〜(Ｅ)に示すように、オイル補給口(４ａ)は弁キャップ(２)の中心軸線(２ａ)の軸長方向に沿っている。
このため、オイル補給口(４ａ)から弁キャップ(２)内に補給されたオイルミストや凝縮オイルが、図４(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面の広い範囲に供給され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 As shown in FIGS. 1B to 1E, the oil supply port (4a) is along the axial direction of the central axis (2a) of the valve cap (2).
For this reason, the oil mist or condensed oil replenished into the valve cap (2) from the oil replenishing port (4a) is connected to the end (1c) of the valve shaft (1b) illustrated in FIG. 2) is supplied to a wide range of sliding surfaces, and the function of suppressing wear of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

図１(Ｂ)〜(Ｅ)に示すように、弁キャップ(２)の周壁(４)は複数のオイル補給口(４ａ)を備えている。
このため、多くのオイルミストや凝縮オイルが複数のオイル補給口(４ａ)を経て、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面に案内され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 As shown in FIGS. 1B to 1E, the peripheral wall (4) of the valve cap (2) has a plurality of oil supply ports (4a).
For this reason, a large amount of oil mist or condensed oil passes through a plurality of oil supply ports (4a) and slides between the end (1c) of the valve shaft (1b) illustrated in FIG. 1 (A) and the valve cap (2). The function of suppressing the wear of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

図１(Ｃ)(Ｄ)，図４(Ｃ)(Ｄ)に示すように、弁キャップ(２)の中心軸線(２ａ)と平行な向きに見て、一対のオイル補給口(４ａ)(４ａ)は、弁キャップ(２)の端壁(３)の中央部(３ｃ)を間に挟んで、相互反対側に配置されている。
このため、各オイル補給孔(３ａ)から弁キャップ(２)内に補給されたオイルミストや凝縮オイルが相互反対側に均等に分配され、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が偏りなく潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 As shown in FIGS. 1 (C) (D) and 4 (C) (D), when viewed in a direction parallel to the central axis (2a) of the valve cap (2), a pair of oil supply ports (4a) ( 4a) is arrange | positioned on both sides mutually on both sides of the center part (3c) of the end wall (3) of the valve cap (2).
For this reason, oil mist and condensed oil replenished into the valve cap (2) from each oil replenishment hole (3a) are evenly distributed to the opposite sides, and the valve shaft (1b) illustrated in FIG. The end (1c) and the valve cap (2) are lubricated without unevenness, and the wear suppression function of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

図１(Ｂ)〜(Ｅ)に示すように、弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は下端開口(４ｅ)を備え、下端開口(４ｅ)は周壁(４)の下面(４ｆ)で開口されている。
このため、図１(Ａ)に示す弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の摺動面で発生した磨耗粉が、オイルで洗い流され、オイル補給口(４ａ)を経て、オイル補給口(４ａ)の下端開口(４ｅ)から速やかに流出し、磨耗粉による新たな磨耗が抑制され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗を抑制する機能が高まる。 As shown in FIGS. 1B to 1E, the valve cap (2) has the end wall (3) on the upper side, the oil supply port (4a) has a lower end opening (4e), and the lower end opening (4e). Is opened at the lower surface (4f) of the peripheral wall (4).
For this reason, the abrasion powder generated on the sliding surface of the end (1c) of the valve shaft (1b) and the valve cap (2) shown in FIG. 1 (A) is washed away with oil, and the oil supply port (4a) is opened. After that, it quickly flows out from the lower end opening (4e) of the oil replenishing port (4a), and new wear due to wear powder is suppressed, so that the end (1c) of the valve shaft (1b) and the valve cap (2) are worn away. The function to suppress increases.

図１(Ｂ)〜(Ｅ)に示すように、弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は上端開口(４ｄ)を備え、上端開口(４ｄ)は端壁(３)の上面(３ａ)で開口されている。
このため、弁キャップ(２)の端壁(３)の上面(３ａ)で凝縮した多くの凝縮オイルが上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 As shown in FIGS. 1B to 1E, the valve cap (2) has the end wall (3) on the upper side, the oil supply port (4a) has an upper end opening (4d), and the upper end opening (4d). Is opened at the upper surface (3a) of the end wall (3).
Therefore, a large amount of condensed oil condensed on the upper surface (3a) of the end wall (3) of the valve cap (2) flows into the oil supply port (4a) from the upper end opening (4d), and is illustrated in FIG. 1 (A). The end (1c) of the valve shaft (1b) and the valve cap (2) are lubricated, and the wear suppression function of the end (1c) of the valve shaft (1b) and the valve cap (2) is enhanced.

次に、図４(Ｂ)〜(Ｅ)に示す第２実施形態について説明する。
この第２実施形態は、第１実施形態の弁キャップ(２)にオイル溜め凹部(３ｂ)を追加したものである。
図４(Ｂ)〜(Ｅ)に示すように、端壁(３)はオイル溜め凹部(３ｂ)を備え、オイル溜め凹部(３ｂ)はオイル補給口(４ａ)の上端開口(４ｄ)と連通している。
このため、弁キャップ(２)の端壁(３)の上面(３ａ)で凝縮した多くの凝縮オイルがオイル溜め凹部(３ｂ)に溜まり、上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。 Next, a second embodiment shown in FIGS. 4B to 4E will be described.
In the second embodiment, an oil reservoir recess (3b) is added to the valve cap (2) of the first embodiment.
As shown in FIGS. 4B to 4E, the end wall (3) is provided with an oil reservoir recess (3b), and the oil reservoir recess (3b) communicates with the upper end opening (4d) of the oil supply port (4a). doing.
Therefore, much condensed oil condensed on the upper surface (3a) of the end wall (3) of the valve cap (2) is accumulated in the oil reservoir recess (3b) and flows into the oil supply port (4a) from the upper end opening (4d). Then, the end (1c) of the valve shaft (1b) and the valve cap (2) illustrated in FIG. 1 (A) are lubricated, and the end (1c) of the valve shaft (1b) and the valve cap (2) are worn. The suppression function is increased.

図４(Ｂ)〜(Ｅ)に示すように、オイル溜め凹部(３ｂ)は端壁(３)の中央部を取り囲む円環状の溝で形成されている。
このため、端壁(３)の上面(３ａ)の広い領域で凝縮した多くの凝縮オイルがオイル溜め凹部(３ｂ)に溜まり、上端開口(４ｄ)からオイル補給口(４ａ)に流入し、図１(Ａ)に例示する弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)が潤滑され、弁軸(１ｂ)の端部(１ｃ)と弁キャップ(２)の磨耗抑制機能が高まる。
他の構成と機能は、第１実施形態と同じである。
図４(Ａ)〜(Ｅ)中、第１実施形態と同一の要素には、図１(Ａ)〜(Ｅ)と同一の符号を付しておく。 As shown in FIGS. 4B to 4E, the oil reservoir recess (3b) is formed by an annular groove surrounding the central portion of the end wall (3).
For this reason, much condensed oil condensed in a wide area of the upper surface (3a) of the end wall (3) is accumulated in the oil reservoir recess (3b) and flows into the oil supply port (4a) from the upper end opening (4d). The end portion (1c) of the valve shaft (1b) and the valve cap (2) exemplified in 1 (A) are lubricated, and the wear suppression function of the end portion (1c) of the valve shaft (1b) and the valve cap (2) is provided. Rise.
Other configurations and functions are the same as those of the first embodiment.
4A to 4E, the same reference numerals as those in FIGS. 1A to 1E are attached to the same elements as those in the first embodiment.

(１) ポペット弁
(１ａ) 弁頭
(１ｂ) 弁軸
(１ｃ) 端部
(２) 弁キャップ
(２ａ) 中心軸線
(３) 端壁
(３ａ) 上面
(３ｂ) オイル溜め凹部
(３ｃ) 中央部
(４) 周壁
(４ａ) オイル補給口
(４ｂ) 外周開口
(４ｃ) 外周面
(４ｄ) 上端開口
(４ｅ) 下端開口
(４ｆ) 下面 (1) Poppet valve
(1a) Valve head
(1b) Valve stem
(1c) Edge
(2) Valve cap
(2a) Center axis
(3) End wall
(3a) Top surface
(3b) Oil reservoir recess
(3c) Central part
(4) Perimeter wall
(4a) Oil supply port
(4b) Perimeter opening
(4c) Outer peripheral surface
(4d) Upper end opening
(4e) Lower end opening
(4f) Bottom surface

Claims (8)

吸気または排気を行うポペット弁(１)と弁キャップ(２)を備え、ポペット弁(１)は弁頭(１ａ)と弁軸(１ｂ)を備え、弁キャップ(２)は弁軸(１ｂ)の端部(１ｃ)に嵌合されている、エンジンの弁装置において、
弁キャップ(２)は、弁軸(１ｂ)の端部(１ｃ)に回転可能に遊嵌され、
弁キャップ(２)の周壁(４)はオイル補給口(４ａ)を備え、オイル補給口(４ａ)は弁キャップ(２)の周壁(４)を貫通し、オイル補給口(４ａ)の外周開口(４ｂ)は周壁(４)の外周面(４ｃ)で開口されている、ことを特徴とするエンジンの弁装置。 A poppet valve (1) for performing intake or exhaust and a valve cap (2) is provided, the poppet valve (1) is provided with a valve head (1a) and a valve shaft (1b), and the valve cap (2) is provided with a valve shaft (1b). In the engine valve device fitted to the end (1c) of the engine,
The valve cap (2) is loosely fitted to the end (1c) of the valve shaft (1b),
The peripheral wall (4) of the valve cap (2) is provided with an oil supply port (4a), and the oil supply port (4a) penetrates the peripheral wall (4) of the valve cap (2) to open the outer periphery of the oil supply port (4a). (4b) is an engine valve device, characterized in that it is opened at the outer peripheral surface (4c) of the peripheral wall (4). 請求項１に記載されたエンジンの弁装置において、
オイル補給口(４ａ)は弁キャップ(２)の中心軸線(２ａ)の軸長方向に沿っている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 1,
An engine valve device characterized in that the oil supply port (4a) is along the axial direction of the central axis (2a) of the valve cap (2). 請求項２に記載されたエンジンの弁装置において、
弁キャップ(２)の周壁(４)は複数のオイル補給口(４ａ)を備えている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 2,
An engine valve device characterized in that the peripheral wall (4) of the valve cap (2) is provided with a plurality of oil supply ports (4a). 請求項３に記載されたエンジンの弁装置において、
弁キャップ(２)の中心軸線(２ａ)と平行な向きに見て、一対のオイル補給口(４ａ)(４ａ)は、弁キャップ(２)の端壁(３)の中央部(３ｃ)を間に挟んで、相互反対側に配置されている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 3,
When viewed in a direction parallel to the central axis (2a) of the valve cap (2), the pair of oil replenishing ports (4a) and (4a) has a central portion (3c) of the end wall (3) of the valve cap (2). An engine valve device, wherein the engine valve device is disposed on opposite sides of each other. 請求項１から請求項４のいずれかに記載されたエンジンの弁装置において、
弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は下端開口(４ｅ)を備え、下端開口(４ｅ)は周壁(４)の下面(４ｆ)で開口されている、ことを特徴とするエンジンの弁装置。 The engine valve device according to any one of claims 1 to 4, wherein:
The valve cap (2) has the end wall (3) on the upper side, the oil supply port (4a) has a lower end opening (4e), and the lower end opening (4e) is opened at the lower surface (4f) of the peripheral wall (4). An engine valve device. 請求項１から請求項５のいずれかに記載されたエンジンの弁装置において、
弁キャップ(２)は端壁(３)が上側とされ、オイル補給口(４ａ)は上端開口(４ｄ)を備え、上端開口(４ｄ)は端壁(３)の上面(３ａ)で開口されている、ことを特徴とするエンジンの弁装置。 The valve device for an engine according to any one of claims 1 to 5,
The valve cap (2) has the end wall (3) on the upper side, the oil supply port (4a) has an upper end opening (4d), and the upper end opening (4d) is opened at the upper surface (3a) of the end wall (3). An engine valve device characterized by that. 請求項６に記載されたエンジンの弁装置において、
端壁(３)はオイル溜め凹部(３ｂ)を備え、オイル溜め凹部(３ｂ)はオイル補給口(４ａ)の上端開口(４ｄ)と連通している、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 6,
An end valve (3) includes an oil reservoir recess (3b), and the oil reservoir recess (3b) communicates with an upper end opening (4d) of an oil supply port (4a). 請求項７に記載されたエンジンの弁装置において、
オイル溜め凹部(３ｂ)は端壁(３)の中央部を取り囲む円環状の溝で形成されている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 7,
The oil reservoir recess (3b) is formed by an annular groove surrounding the center of the end wall (3).
JP2015069333A 2015-03-30 2015-03-30 Engine valve device Pending JP2016188615A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140107U (en) * 1978-03-23 1979-09-28
JPS5536932U (en) * 1978-08-30 1980-03-10
JPS55127819U (en) * 1979-03-03 1980-09-10
JPS55176414U (en) * 1979-06-05 1980-12-18
JPS59231122A (en) * 1983-06-15 1984-12-25 Nissan Motor Co Ltd Valve cap

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140107U (en) * 1978-03-23 1979-09-28
JPS5536932U (en) * 1978-08-30 1980-03-10
JPS55127819U (en) * 1979-03-03 1980-09-10
JPS55176414U (en) * 1979-06-05 1980-12-18
JPS59231122A (en) * 1983-06-15 1984-12-25 Nissan Motor Co Ltd Valve cap

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