JP2007526419A - Gas exchange valve for internal combustion engine - Google Patents

Gas exchange valve for internal combustion engine Download PDF

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JP2007526419A
JP2007526419A JP2007501103A JP2007501103A JP2007526419A JP 2007526419 A JP2007526419 A JP 2007526419A JP 2007501103 A JP2007501103 A JP 2007501103A JP 2007501103 A JP2007501103 A JP 2007501103A JP 2007526419 A JP2007526419 A JP 2007526419A
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valve
cone
gas exchange
hollow
ring
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JP4708413B2 (en
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アベーレ マルクス
レヒナー マルティン
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Mahle Ventiltrieb GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Abstract

本発明は、内燃機関のガス交換弁であって、各１つの特に中空の弁軸（３）と弁頭とが設けられており、
弁頭が弁底（１）と、該弁底の外縁部に結合された中空の弁円錐（２）とを有していて、該弁円錐（２）が、弁底からの間隔増大に連れて先細になっており、
弁軸（３）が中空の弁円錐（２）を貫通していて、それぞれ一方では弁底（１）とかつ他方では弁円錐（２）の先細の端部と堅固に結合されており、
弁底（１）に結合された弁軸（３）の端部が、弁円錐（２）と弁底（１）との間における結合平面を超えて延びている形式のものに関する。
このような形式のガス交換弁において、その安定性及び耐疲労性を改善するために、本発明によるガス交換弁では、弁底（１）が、弁軸（３）との結合部と弁円錐（２）との結合部との間に位置しているリング領域において、半径方向に隣接して少なくとも１つのリングエンボス加工部（５；５′,１１）を有していて、該リングエンボス加工部（５；５′,１１）が、外方に向かって凸面状に延びているリングエンボス加工部断面を備えている。The present invention is a gas exchange valve for an internal combustion engine, each having a particularly hollow valve shaft (3) and a valve head,
The valve head has a valve bottom (1) and a hollow valve cone (2) connected to the outer edge of the valve bottom, and the valve cone (2) increases as the distance from the valve bottom increases. Taper,
The valve stem (3) passes through the hollow valve cone (2), each firmly connected to the valve bottom (1) on the one hand and the tapered end of the valve cone (2) on the other;
The end of the valve shaft (3) connected to the valve bottom (1) relates to a type extending beyond the connection plane between the valve cone (2) and the valve bottom (1).
In order to improve the stability and fatigue resistance of such a type of gas exchange valve, in the gas exchange valve according to the present invention, the valve bottom (1) is connected to the valve shaft (3) and the valve cone. (2) having at least one ring embossing portion (5; 5 ', 11) adjacent in the radial direction in the ring region located between the coupling portion and the ring embossing The part (5; 5 ', 11) is provided with a ring embossed section extending in a convex shape towards the outside.

Description

本発明は、請求項１の上位概念部に記載された形式の内燃機関のガス交換弁に関する。   The present invention relates to a gas exchange valve for an internal combustion engine of the type described in the superordinate conceptual part of claim 1.

このようなガス交換弁は、例えば国際公開第９９／１６２９５号パンフレット及び米国特許第２３９８５１４号明細書に基づいて公知である。   Such gas exchange valves are known, for example, on the basis of WO 99/16295 and US Pat. No. 2,398,514.

本発明の課題は、弁頭、特にその底部領域において、温度や燃焼室圧によって生じる負荷を、最適化された弁頭のジオメトリ、特にその底部領域におけるジオメトリによって最小にすると共に、可能な限り壁厚を小さくすることである。この場合特に弁の全体的な変形もまた注意されねばならず、つまり燃焼室圧を受けた場合における、底部真ん中に位置する支持部と外側の底部領域との間における弁底の変形や、弁軸のシフトに関して、注意されねばならない。   The object of the present invention is to minimize the load caused by temperature and combustion chamber pressure in the valve head, in particular its bottom region, by means of optimized valve head geometry, in particular its geometry in the bottom region, and to the extent possible It is to reduce the thickness. In this case, especially the overall deformation of the valve must also be taken into account, i.e. the deformation of the valve bottom between the support located in the middle of the bottom and the outer bottom region when subjected to combustion chamber pressure, Care must be taken regarding shaft shifts.

この課題を解決するために本発明の構成では、請求項１の上位概念部記載の形式のガス交換弁において、請求項１の特徴部記載のようにした。   In order to solve this problem, in the configuration of the present invention, the gas exchange valve of the type described in the superordinate concept part of claim 1 is configured as described in the characteristic part of claim 1.

本発明によるガス交換弁の別の有利な構成は、請求項２以下に記載されている。   Another advantageous configuration of the gas exchange valve according to the invention is described in claim 2 and below.

本発明は次のような一般的な思想、すなわち弁底が、全体として凸面状に外方に向かって押し出された形状を有している場合に、弁軸線を中心にした複数の環状のエンボス加工領域を設け、これらのエンボス加工領域がそれぞれ凸面状に外方に向かって延びるエンボス加工断面を有していることによって、弁底を補強する、という一般的な思想に基づいている。トーラス区分もしくは円環区分とも呼ぶことができるこのようなリングエンボス加工部は、弁軸における内側の支持部と弁円錐における外側の結合部との間に、１つ設けるだけで十分である。さらに弁底の中央領域は、該中央領域が中空に形成された弁軸に隣接している場合には、外方に向かって凸面状に成形されていても、又は凹面状に成形されていてもよい。本発明によるガス交換弁の個々のエレメントは、弁が金属製の場合、通常は互いに溶接されている。   The present invention provides the following general idea, that is, a plurality of annular embosses centered on the valve axis when the valve bottom has a generally convex shape that is pushed outward. This is based on the general idea of reinforcing the valve bottom by providing a processing region, and each of the embossing regions has an embossed cross section extending outwardly in a convex shape. It is sufficient to provide one such ring embossed part, also called torus section or ring section, between the inner support part in the valve stem and the outer joint part in the valve cone. Further, the central region of the valve bottom is formed in a convex shape toward the outside or in a concave shape when the central region is adjacent to the valve shaft formed in a hollow shape. Also good. The individual elements of the gas exchange valve according to the invention are usually welded together when the valve is made of metal.

実地において一般的に使用されている「弁円錐」という言葉において、「円錐」というのは、その形状に関して幾何学的に厳密なものを意味しているのではなく、任意のホッパ形状を意味しているに過ぎない。   In the term “valve cone”, which is commonly used in practice, the term “cone” does not mean geometrically exact with respect to its shape, but any hopper shape. It ’s just that.

本発明の特に有利な構成では、弁底は接続カラーを介して弁円錐に接続されている。この接続は、本発明の別の構成では、接続カラーの形をした弁底の半径方向外側の縁部領域と、弁円錐の半径方向外側の縁部領域とが、弁円錐と同じ方向に向かって先細に形成されていて弁軸線に立てられた仮想の円錐の周面から形成された結合面に位置しており、かつこの円錐面において一緒に円錐底面に向かって延びている。   In a particularly advantageous configuration of the invention, the valve bottom is connected to the valve cone via a connection collar. In another configuration of the invention, this connection is such that the radially outer edge region of the valve bottom in the form of a connection collar and the radially outer edge region of the valve cone face in the same direction as the valve cone. It is located on a coupling surface formed from a circumferential surface of a virtual cone that is tapered and is erected on the valve axis, and extends together toward the bottom surface of the cone.

このような縁部構成もしくは接続構成によって、弁においては、これによって得られる高められた弁底安定性に加えて、特に弁底の外側領域における環流特性が改善される。このような構成によってまた加工及び一般的な構成部材特性に関しても、改善が達成される。弁頭と弁底との間における継ぎ目領域が、上に述べたような形式の接続もしくは結合領域を備えて構成されていると、原則的には、弁底の半径方向内側に向かって接続する構成とは無関係に、つまり任意に成形された弁底に対して一様に有利である。   Such an edge configuration or connection configuration improves the reflux characteristics in the valve, in particular in the outer region of the valve bottom, in addition to the increased valve bottom stability obtained thereby. Such an arrangement also achieves improvements with respect to processing and general component properties. If the seam area between the valve head and the valve bottom is configured with a connection or coupling area of the type described above, in principle, the connection is made radially inward of the valve bottom. Regardless of the configuration, that is, it is equally advantageous for arbitrarily shaped valve bottoms.

本発明のさらに別の有利な構成では、仮想の円錐の周面と仮想の円錐の底面とによって形成された円錐角度が、１８０°−αであって、この場合α＝１５°〜４５°、特に１５°〜３５°である。   In a further advantageous configuration of the invention, the cone angle formed by the virtual cone's circumferential surface and the virtual cone's bottom surface is 180 ° -α, where α = 15 ° -45 °, In particular, it is 15 ° to 35 °.

次に図面を参照しながら本発明の有利な実施例を説明する。   An advantageous embodiment of the invention will now be described with reference to the drawings.

図１は、１つのリングエンボス加工部によって補強された弁底を備えた、中空の弁頭を示す縦断面図であり、
図２は、図１に示されたように１つのリングエンボス加工部によって補強された弁底を備えていて、しかも半径方向外側に位置する接続カラーを備えた、中空の弁頭を示す縦断面図であり、
図３は、図２に示されたように１つのリングエンボス加工部によって補強された弁底を備えかつ半径方向外側に位置する接続カラーを備えていて、しかも弁頭の内部に拡大された弁軸を備えた、中空の弁頭を示す縦断面図であり、
図４は、図１に示されたように１つのリングエンボス加工部によって補強された弁底を備えていて、しかも中央領域に付加的な凸面状の構成を備えた、中空の弁頭を示す縦断面図であり、
図５は、図２に示された基本形状において、付加的なリングエンボス加工部と弁頭内部における支持円錐とを備えた、中空の弁頭を示す縦断面図である。 FIG. 1 is a longitudinal sectional view showing a hollow valve head with a valve bottom reinforced by one ring embossing part;
FIG. 2 is a longitudinal section showing a hollow valve head with a valve collar reinforced by one ring embossing as shown in FIG. 1 and with a connecting collar located radially outward Figure
FIG. 3 shows a valve with a valve bottom reinforced by one ring embossing as shown in FIG. 2 and with a connecting collar located radially outward, and enlarged inside the valve head. It is a longitudinal section showing a hollow valve head with a shaft,
FIG. 4 shows a hollow valve head with a valve bottom reinforced by one ring embossing as shown in FIG. 1 and with an additional convex configuration in the central region. It is a longitudinal section,
FIG. 5 is a longitudinal sectional view showing a hollow valve head with an additional ring embossing portion and a support cone inside the valve head in the basic shape shown in FIG. 2.

図示の実施例において、金属製の弁頭の個々の構成エレメントは互いに溶接されているが、溶接シーム自体は図示されていない。   In the illustrated embodiment, the individual components of the metal valve head are welded together, but the weld seam itself is not shown.

すべての図示の実施例におけるように図１に示された本発明による弁頭は、弁底１と中空の弁円錐２と中空の弁軸３とを有している。弁底１は一方では中空円筒形に載置された弁軸３と溶接され、かつ他方では弁円錐２の外縁部と溶接されている。弁円錐２の先細の端部もまた弁軸３と溶接されている。上に述べた互いに結合されている構成部材は、一緒に、曲げ剛性の回転面支持構造（Rotationsflaechentragwerk）を形成している。弁底１は、底の中央に、ほぼ平らな中央領域４を有している。この中央領域４と弁底１の外縁部との間に位置しているリング領域は、円環区分とも呼ぶことができるリングエンボス加工部５として、外方に向かって凸面状の湾曲部をもって形成されている。このような設計によってこの形状が最適化されていると、温度及び燃焼室ピーク圧による総合負荷を最小にすることができ、かつ局部的な負荷最大値を均一化することによって負荷を減じることができる。   The valve head according to the invention shown in FIG. 1 as in all illustrated embodiments has a valve bottom 1, a hollow valve cone 2 and a hollow valve stem 3. The valve bottom 1 is welded on the one hand to the valve stem 3 mounted in a hollow cylinder and on the other hand to the outer edge of the valve cone 2. The tapered end of the valve cone 2 is also welded to the valve stem 3. Together, the components described above together form a rotationally rigid rotating surface support structure (Rotationsflaechentragwerk). The valve bottom 1 has a substantially flat central region 4 in the center of the bottom. The ring region located between the central region 4 and the outer edge portion of the valve bottom 1 is formed as a ring embossed portion 5 that can also be called an annular segment, with a convex curved portion toward the outside. Has been. With this design optimized for this shape, the total load due to temperature and combustion chamber peak pressure can be minimized and the load can be reduced by equalizing the local maximum load. it can.

図２に示された弁では付加的に、リングエンボス加工部５と、半径方向外側に位置している、弁底１と弁円錐２との間の接合領域６との間に、接続カラー７が一体成形されている。   In addition, in the valve shown in FIG. 2, a connecting collar 7 is provided between the ring embossed portion 5 and the joint area 6 between the valve bottom 1 and the valve cone 2, which is located radially outward. Is integrally molded.

接続カラー７は弁円錐２に結合面において隣接しており、この結合面は、弁円錐２に対して同じ方向で先細になっていて弁軸線を中心にした仮想の円錐の周面によって形成されている。接続カラー７と、該接続カラーに隣接した弁円錐２の縁部領域とは一緒に、円錐の周面において円錐底面に向かって延びている。仮想の円錐の周面とその円錐底面とによって形成された円錐角度は、有利には１８０°−αであり、この場合α＝１５°〜３５°である。   The connecting collar 7 is adjacent to the valve cone 2 at the coupling surface, which is formed by a virtual conical circumferential surface that tapers in the same direction with respect to the valve cone 2 and is centered on the valve axis. ing. Together with the connecting collar 7 and the edge region of the valve cone 2 adjacent to the connecting collar, it extends towards the bottom of the cone on the circumferential surface of the cone. The cone angle formed by the peripheral surface of the virtual cone and its bottom surface is preferably 180 ° -α, where α = 15 ° to 35 °.

図３に示された弁構成では、図２に示された構成とは異なり、弁の内部に拡大された領域８を備えた弁軸３が使用されている。この拡大された領域８によって、弁底１の該弁底中央領域における改善された支持が達成される。   In the valve configuration shown in FIG. 3, unlike the configuration shown in FIG. 2, a valve shaft 3 having an enlarged region 8 inside the valve is used. This enlarged area 8 achieves an improved support in the valve bottom central area of the valve bottom 1.

図４に示された弁構成が図３に示された弁構成と異なっている点は単に次のことである。すなわち図４に示された弁構成では、弁底１の中央領域９が弁軸３の拡大された領域８の内に外方に向かって突出するように湾曲されていることである。   The difference between the valve configuration shown in FIG. 4 and the valve configuration shown in FIG. 3 is as follows. That is, in the valve configuration shown in FIG. 4, the central region 9 of the valve bottom 1 is curved so as to protrude outward into the enlarged region 8 of the valve shaft 3.

図５に示された構成は、図２に示された弁・基本形状に基づいている。図２に示された構成とは異なり、弁円錐２の内部に支持円錐１０が設けられている。この支持円錐１０はその先細の領域において弁軸３に溶接されている。支持円錐１０は同様に弁底１にも溶接されている。支持円錐１０が弁底１に溶接されている領域は、弁底１に互いに同心的に成形されたリングエンボス加工部５′とリングエンボス加工部１１との間に位置しており、両リングエンボス加工部５′,１１はそれぞれ凸面状に外方に向かって延びる断面を有している。互いに同心的に延びる２つのリングエンボス加工部５′,１１を備えた弁底は、特に良好な安定性を有している。   The configuration shown in FIG. 5 is based on the valve / basic shape shown in FIG. Unlike the configuration shown in FIG. 2, a support cone 10 is provided inside the valve cone 2. This support cone 10 is welded to the valve stem 3 in its tapered region. The support cone 10 is likewise welded to the valve bottom 1. The region where the support cone 10 is welded to the valve bottom 1 is located between a ring embossed portion 5 ′ and a ring embossed portion 11 which are formed concentrically with each other on the valve bottom 1. Each of the processing parts 5 'and 11 has a cross section extending outwardly in a convex shape. The valve bottom with two ring embossed parts 5 ', 11 extending concentrically with each other has a particularly good stability.

上におけるすべての実施例及び請求の範囲において開示された特徴は、個々においても又は互いに任意に組み合わせられてもよい。   The features disclosed in all embodiments and claims above may be combined individually or in any combination with one another.

１つのリングエンボス加工部によって補強された弁底を備えた、中空の弁頭を示す縦断面図である。It is a longitudinal cross-sectional view which shows the hollow valve head provided with the valve bottom reinforced by one ring embossing part. 図１に示されたように１つのリングエンボス加工部によって補強された弁底を備えていて、しかも半径方向外側に位置する接続カラーを備えた、中空の弁頭を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing a hollow valve head including a valve bottom reinforced by one ring embossing portion as shown in FIG. 1 and having a connecting collar located radially outward. 図２に示されたように１つのリングエンボス加工部によって補強された弁底を備えかつ半径方向外側に位置する接続カラーを備えていて、しかも弁頭の内部に拡大された弁軸を備えた、中空の弁頭を示す縦断面図である。As shown in FIG. 2, it has a valve bottom reinforced by one ring embossing part and a connecting collar located radially outward, and also has an enlarged valve stem inside the valve head. It is a longitudinal cross-sectional view which shows a hollow valve head. 図１に示されたように１つのリングエンボス加工部によって補強された弁底を備えていて、しかも中央領域に付加的な凸面状の構成を備えた、中空の弁頭を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing a hollow valve head having a valve bottom reinforced by one ring embossed portion as shown in FIG. 1 and having an additional convex configuration in the central region; is there. 図２に示された基本形状において、付加的なリングエンボス加工部と弁頭内部における支持円錐とを備えた、中空の弁頭を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a hollow valve head with an additional ring embossed portion and a support cone inside the valve head in the basic shape shown in FIG. 2.

Claims (9)

内燃機関のガス交換弁であって、各１つの特に中空の弁軸（３）と弁頭とが設けられており、
弁頭が弁底（１）と、該弁底の外縁部に結合された中空の弁円錐（２）とを有していて、該弁円錐（２）が、弁底からの間隔増大に連れて先細になっており、
弁軸（３）が中空の弁円錐（２）を貫通していて、それぞれ一方では弁底（１）とかつ他方では弁円錐（２）の先細の端部と堅固に結合されており、
弁底（１）に結合された弁軸（３）の端部が、弁円錐（２）と弁底（１）との間における結合平面を超えて延びている形式のものにおいて、
弁底（１）が、弁軸（３）との結合部と弁円錐（２）との結合部との間に位置しているリング領域において、半径方向に隣接して少なくとも１つのリングエンボス加工部（５；５′,１１）を有していて、該リングエンボス加工部（５；５′,１１）が、外方に向かって凸面状に延びているリングエンボス加工部断面を備えていることを特徴とする、内燃機関のガス交換弁。 A gas exchange valve for an internal combustion engine, each provided with a particularly hollow valve shaft (3) and a valve head;
The valve head has a valve bottom (1) and a hollow valve cone (2) connected to the outer edge of the valve bottom, and the valve cone (2) increases as the distance from the valve bottom increases. Taper,
The valve stem (3) passes through the hollow valve cone (2), each firmly connected to the valve bottom (1) on the one hand and the tapered end of the valve cone (2) on the other;
In the type in which the end of the valve stem (3) connected to the valve bottom (1) extends beyond the connection plane between the valve cone (2) and the valve bottom (1),
At least one ring embossing radially adjacent in the ring region where the valve bottom (1) is located between the connection with the valve stem (3) and the connection with the valve cone (2) Part (5; 5 ', 11), the ring embossed part (5; 5', 11) having a ring embossed section extending outwardly in a convex shape. A gas exchange valve for an internal combustion engine. 弁軸（３）が、弁底（１）に結合された端部において、弁円錐（２）における結合領域よりも大きな直径を有している、請求項１記載のガス交換弁。   2. A gas exchange valve according to claim 1, wherein the valve stem (3) has a larger diameter at the end connected to the valve bottom (1) than the connecting area in the valve cone (2). 弁底（９）に接触していて円筒形の開口を有している中空の弁シャフトが設けられており、弁底（１）が、弁軸（３）の中空室に隣接している領域内において、外方に向かって凸面状に湾曲されている、請求項１又は２記載のガス交換弁。   A hollow valve shaft that is in contact with the valve bottom (9) and has a cylindrical opening is provided, where the valve bottom (1) is adjacent to the hollow chamber of the valve shaft (3) The gas exchange valve according to claim 1, wherein the gas exchange valve is curved in a convex shape toward the outside. 弁底（１）が、弁軸（３）の中空室に隣接している領域内において、外方から内方に向かって凹面状に湾曲されている、請求項１又は２記載のガス交換弁。   The gas exchange valve according to claim 1 or 2, wherein the valve bottom (1) is curved in a concave shape from the outside to the inside in a region adjacent to the hollow chamber of the valve shaft (3). . 弁円錐（２）の内部に内側の支持円錐（１０）が設けられていて、該支持円錐（１０）が、一方では半径方向において互いに隣接する２つの弁底・リングエンボス加工部（５′,１１）の間において弁底（１）に結合されていて、かつ他方では先細になる領域において弁軸（３）に結合されている、請求項１から４までのいずれか１項記載のガス交換弁。   The inside of the valve cone (2) is provided with an inner support cone (10) which, on the one hand, has two valve bottom and ring embossed portions (5 ', Gas exchange according to any one of claims 1 to 4, wherein the gas exchange is connected to the valve bottom (1) during 11) and to the valve stem (3) in a tapered region on the other side. valve. リングエンボス加工部（５；５′,１１）が、放物線形状、双曲線形状又は対数曲線形状に設計された断面経過を有している、請求項１から５までのいずれか１項記載のガス交換弁。   Gas exchange according to any one of claims 1 to 5, wherein the ring embossing part (5; 5 ', 11) has a cross-sectional profile designed in a parabolic shape, a hyperbolic shape or a logarithmic curve shape. valve. 内燃機関のガス交換弁であって、各１つの弁軸（３）と弁頭とが設けられており、
弁頭が弁底（１）と、該弁底の外縁部に結合された中空の弁円錐（２）とを有していて、該弁円錐（２）が、弁底からの間隔増大に連れて先細になっており、
弁軸（３）が中空の弁円錐（２）を貫通していて、それぞれ一方では弁底（１）とかつ他方では弁円錐（２）の先細の端部と堅固に結合されている形式の、特に請求項１から６までのいずれか１項記載のガス交換弁において、
接続カラー（７）の形をした弁底（１）の半径方向外側の縁部領域と、弁円錐（２）の半径方向外側の縁部領域とが、弁円錐（２）と同じ方向に向かって先細に形成されていて弁軸線に立てられた仮想の円錐の周面から形成された結合面に位置しており、かつこの円錐面において一緒に円錐底面に向かって延びていることを特徴とする、内燃機関のガス交換弁。 A gas exchange valve for an internal combustion engine, each provided with one valve shaft (3) and a valve head;
The valve head has a valve bottom (1) and a hollow valve cone (2) connected to the outer edge of the valve bottom, and the valve cone (2) increases as the distance from the valve bottom increases. Taper,
The valve stem (3) passes through a hollow valve cone (2), each of which is tightly connected to the valve bottom (1) on the one hand and the tapered end of the valve cone (2) on the other. In particular, in the gas exchange valve according to any one of claims 1 to 6,
The radially outer edge region of the valve bottom (1) in the form of a connecting collar (7) and the radially outer edge region of the valve cone (2) face in the same direction as the valve cone (2). It is characterized in that it is located on a coupling surface formed from a peripheral surface of an imaginary cone that is tapered and is erected on the valve axis, and extends toward the bottom surface of the cone together in this conical surface A gas exchange valve for an internal combustion engine. 仮想の円錐の周面と仮想の円錐の底面とによって形成された円錐角度が、１８０°−αであって、この場合α＝１５°〜４５°である、請求項７記載のガス交換弁。   The gas exchange valve according to claim 7, wherein the cone angle formed by the peripheral surface of the virtual cone and the bottom surface of the virtual cone is 180 ° -α, where α = 15 ° to 45 °. 角度αが１５°〜３５°である、請求項８記載のガス交換弁。   The gas exchange valve according to claim 8, wherein the angle α is 15 ° to 35 °.
JP2007501103A 2004-03-03 2005-02-04 Gas exchange valve for internal combustion engine Expired - Fee Related JP4708413B2 (en)

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PCT/DE2005/000179 WO2005085605A1 (en) 2004-03-03 2005-02-04 Gas exchange valve for an internal combustion engine

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