JP2015081597A - Valve train structure of engine - Google Patents

Valve train structure of engine Download PDF

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Publication number
JP2015081597A
JP2015081597A JP2013258252A JP2013258252A JP2015081597A JP 2015081597 A JP2015081597 A JP 2015081597A JP 2013258252 A JP2013258252 A JP 2013258252A JP 2013258252 A JP2013258252 A JP 2013258252A JP 2015081597 A JP2015081597 A JP 2015081597A
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Prior art keywords
valve
engine
combustion chamber
guide
volume
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李　昇　祐
Seung-Woo Lee
昇 祐 李
白　洪　吉
Hong-Kil Baek
洪 吉 白
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a valve train structure of an engine in which a valve bottom surface temperature of an engine combustion chamber is set to a minimum value, a mixture gas temperature in the combustion chamber is reduced to improve knocking and then a combustion efficiency is improved through an ignition timing advance.SOLUTION: This invention comprises a valve including a shaft communicated with a combustion chamber installed at a lower part of an engine and positioned above, a valve guide for guiding a motion of the valve, and a valve train including a valve seat for holding air tightness in the combustion chamber of the valve. The valve shows that a volume of a hollow part is 17% or more of an entire volume of the valve, the amount of refrigerant filled in the hollow part is 60% or more of the volume of the hollow part, the valve seat has a coefficient of thermal conductivity of 25 W/m-K or more, the valve guide has a coefficient of thermal conductivity of 100 W/m-K or more, the bottom surface temperature of the valve is decreased to improve knocking, an ignition timing is advanced in compliance with an expanded knocking range and a fuel efficiency of an engine is improved and a commodity value is increased.

Description

本発明は、エンジンのバルブトレーン構造に係り、より詳しくはエンジン燃焼室のバルブ底面温度を最低化させて燃焼室の混合ガス温度を低減させ、ノッキングを改善するためのエンジンのバルブトレーン構造に関する。 The present invention relates to an engine valve train structure, and more particularly, to an engine valve train structure for improving knocking by minimizing a valve bottom surface temperature of an engine combustion chamber to reduce a mixed gas temperature of the combustion chamber.

一般に、エンジンは燃焼室に燃料と空気を受け入れてこれを燃焼することにより動力を形成するが、空気を吸入する際にはカム軸（ｃａｍｓｈａｆｔ）の駆動により吸気バルブ（ｉｎｔａｋｅ ｖａｌｖｅｓ）を作動させ、吸気バルブが開いているうちに空気が燃焼室に吸入され、 またカム軸の駆動によって排気バルブ（ｅｘｈａｕｓｔ ｖａｌｖｅ）を作動させて排気バルブが開いている間、空気が燃焼室から排出される。 In general, an engine generates power by receiving fuel and air in a combustion chamber and combusting it, and when inhaling air, an intake valve is operated by driving a camshaft, Air is sucked into the combustion chamber while the intake valve is open, and air is discharged from the combustion chamber while the exhaust valve is opened by operating the exhaust valve by driving the camshaft.

一方、エンジンにはバルブと、バルブガイドと、バルブシートからなるバルブトレーンが備えられるが、このようなバルブトレーンを介してカム軸駆動に伴うカムの回転により上下方向の往復運動を行ない吸気排気ポートの開閉を行うことができる。
特に、排気バルブは燃焼室の排気ガスに直接暴露され、排気バルブ底面が燃焼室構成表面のうち一番温度が低く、燃焼室の混合器の温度上昇に影響を及ぼすが、排気バルブ底面温度を下げてノッキングを改善し、燃焼効率を改善する技術は未だ開発されていない。 On the other hand, the engine is equipped with a valve train composed of a valve, a valve guide, and a valve seat. The intake / exhaust port performs a reciprocating motion in the vertical direction by the rotation of the cam accompanying the drive of the camshaft through such a valve train. Can be opened and closed.
In particular, the exhaust valve is directly exposed to the exhaust gas in the combustion chamber, and the bottom surface of the exhaust valve has the lowest temperature among the combustion chamber constituent surfaces, which affects the temperature rise of the mixer in the combustion chamber. No technology has yet been developed to reduce knocking and improve combustion efficiency.

大韓民国登録特許 １０−１１３４８２２Korea Registered Patent 10-1134822 特開２００８−２８０９０２号公報JP 2008-280902 A

本発明は、エンジンのバルブトレーン構造に関するものであって、その目的とするところは、エンジン燃焼室のバルブ底面温度を最低化させて燃焼室の混合ガス温度を低減させ、ノッキングを改善して点火時期進角を介して燃焼効率を向上させるエンジンのバルブトレーン構造を提供することにある。
The present invention relates to a valve train structure of an engine, and an object of the present invention is to minimize the valve bottom surface temperature of the engine combustion chamber to reduce the mixed gas temperature of the combustion chamber, improve knocking, and ignite. An object is to provide an engine valve train structure that improves combustion efficiency through timing advance.

本発明は、下部に備えられた燃焼室と連通され上方に位置する軸を含むバルブと、前記バルブの移動をガイドするバルブガイドと、前記バルブの燃焼室気密を保持するバルブシートを含むバルブトレーンとが備えられ、前記バルブのヘッドと軸内部に中空部が形成され、前記中空部に冷媒が封入されて前記バルブを冷却させ、 バルブシートとバルブガイドの熱伝導率を向上させる追加的な冷却効果を備えることにより達成される。
前記バルブは、中空部の体積が、バルブ全体体積の１７％以上で、かつ、中空部に封入される冷媒量が中空部体積の６０％以上であり、前記バルブシートは、熱伝導率が２５Ｗ／ｍ−Ｋ 以上で、高さ（ａ） 対幅（ｂ）の割合（ｂ／ａ）が６５％以上であり、
バルブガイドは熱伝導率が １００Ｗ／ｍ−Ｋ 以上であるバルブトレーンバルブトレーン
ことを特徴とする。 The present invention relates to a valve train including a valve that includes an upper shaft that communicates with a combustion chamber provided at a lower portion, a valve guide that guides the movement of the valve, and a valve seat that holds the air tightness of the combustion chamber of the valve. Additional cooling that improves the thermal conductivity of the valve seat and the valve guide by forming a hollow portion inside the valve head and the shaft, and cooling the valve by filling a refrigerant in the hollow portion. This is achieved by providing an effect.
In the valve, the volume of the hollow portion is 17% or more of the entire volume of the valve, the amount of refrigerant sealed in the hollow portion is 60% or more of the volume of the hollow portion, and the valve seat has a thermal conductivity of 25 W. / M-K or more, the ratio of height (a) to width (b) (b / a) is 65% or more,
The valve guide is characterized by a valve train having a thermal conductivity of 100 W / m-K or more.

本発明によれば、バルブとバルブガイドとバルブシートからなるバルブトレーンを介しバルブ底面の温度を最低化させ底面に接触する燃焼室内部の混合ガスの温度を下げてノッキングを改善し、拡張されたノッキング領域に合わせて点火時期を進め、エンジンの燃費効率を向上するとともに商品価値を増大させる。 According to the present invention, the temperature of the bottom surface of the valve is minimized through the valve train including the valve, the valve guide, and the valve seat, and the temperature of the mixed gas in the combustion chamber in contact with the bottom surface is lowered to improve knocking. The ignition timing is advanced in accordance with the knocking region to improve the fuel efficiency of the engine and increase the product value.

本発明のエンジンのバルブトレーン構造を示す図である。It is a figure which shows the valve train structure of the engine of this invention. 本発明のエンジンのバルブトレーン構造に適用されたバルブシートを示す図である。It is a figure which shows the valve seat applied to the valve train structure of the engine of this invention. 本発明のエンジンのバルブトレーン構造に適用されたバルブを示す図である。It is a figure which shows the valve applied to the valve train structure of the engine of this invention. 本発明のエンジンのバルブトレーン構造によるバルブ底面温度を示す図である。It is a figure which shows the valve bottom face temperature by the valve train structure of the engine of this invention. 本発明のエンジンのバルブトレーン構造によるバルブの燃焼室の温度及び軸部の温度を示す図である。It is a figure which shows the temperature of the combustion chamber of the valve | bulb by the valve train structure of the engine of this invention, and the temperature of a shaft part.

以下、本発明の実施形態を、図を参照して詳しく説明する。
本発明のエンジンのバルブトレーン構造は、図１に示したように、冷媒（Ｒ）が封入されるバルブ１００と、バルブ１００の移動を案内するバルブガイド１１０と、エンジン燃焼室の機密を保持させるバルブシート１２０を含む。
図１に示したように、バルブ１００はカムシャフト（図示省略） 作動に伴って上下方向に往復運動しエンジン燃焼室に挿入されることにより、シリンダーの爆発行程以降、排気ガスを排気系へ排出させることができる。
このようなバルブ１００は、図３に示したように、ヘッド部１０１と軸部１０２の内部に中空部１０３から形成され、冷媒（Ｒ）が封入される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The valve train structure of the engine of the present invention, as shown in FIG. 1, keeps the valve 100 filled with the refrigerant (R), the valve guide 110 for guiding the movement of the valve 100, and the confidentiality of the engine combustion chamber. A valve seat 120 is included.
As shown in FIG. 1, the valve 100 reciprocates in the vertical direction in accordance with the operation of the camshaft (not shown) and is inserted into the engine combustion chamber to discharge exhaust gas to the exhaust system after the explosion stroke of the cylinder. Can be made.
As shown in FIG. 3, such a valve 100 is formed of a hollow portion 103 inside the head portion 101 and the shaft portion 102 and encloses a refrigerant (R).

一方、中空部１０３の体積は、バルブ１００ 全体体積の １７％ 以上とし、バルブ１００の中空部１０３に封入された冷媒（Ｒ）は、中空部１０３の全体体積の６０％ 以上とし、バルブ１００移動時の冷媒（Ｒ）流動を介してバルブ１００の底面と首部へ伝達された熱エネルギーをバルブの軸部上部へ伝達する効率を向上させることができる。
バルブガイド１１０は、バルブ１００の上部に備えられバルブ１００の移動を案内する。
一方、バルブガイド１１０は熱伝導率が１００Ｗ／ｍ−Ｋ 以上とし、高熱伝導のバルブガイド１１０が適用されることにより、バルブ１００の軸部１０２へ伝達された熱エネルギーをバルブガイド１１０の冷却系へ速やかに伝達できるようにする。 On the other hand, the volume of the hollow portion 103 is set to 17% or more of the total volume of the valve 100, and the refrigerant (R) enclosed in the hollow portion 103 of the valve 100 is set to 60% or more of the total volume of the hollow portion 103. It is possible to improve the efficiency of transmitting the heat energy transmitted to the bottom surface and the neck portion of the valve 100 through the refrigerant (R) flow at the time to the upper portion of the shaft portion of the valve.
The valve guide 110 is provided in the upper part of the valve 100 and guides the movement of the valve 100.
On the other hand, the valve guide 110 has a thermal conductivity of 100 W / m-K or higher, and the high thermal conductivity valve guide 110 is applied, so that the heat energy transmitted to the shaft portion 102 of the valve 100 is transferred to the cooling system of the valve guide 110. To be able to communicate quickly.

図１及び図２に示したように、バルブシート１２０はリング（ｒｉｎｇ） 状になっている。バルブシート１２０はバルブ１００のヘッド部１０１の外周面に備えられ、エンジン燃焼室の機密を保持し、耐久信頼性を確保するためにバルブ１００との接触により生じる摩耗量を少なくする必要がある。
このために、バルブシート１２０は、熱伝導率を２５Ｗ／ｍ−Ｋ 以上とし、高さ（ａ） 対幅（ｂ）の割合（ｂ／ａ）を６５％以上とする。バルブ１００のヘッド部１０１の接触面を充分にカバーすると共に高熱伝導のバルブシート１２０を適用することにより、バルブ１００のヘッド部１０１を介して伝達される熱エネルギーがシリンダーヘッドへ速やかに伝達できるようにする。
このように、本発明はバルブ１００の底面温度低減を最大化させ、燃焼室内の混合器の温度を低減させノッキングを改善し、これにより点火時期進角を改善してエンジン燃費を向上させることができる。 As shown in FIGS. 1 and 2, the valve seat 120 has a ring shape. The valve seat 120 is provided on the outer peripheral surface of the head portion 101 of the valve 100, and it is necessary to reduce the amount of wear caused by contact with the valve 100 in order to maintain the confidentiality of the engine combustion chamber and ensure durability and reliability.
For this reason, the valve seat 120 has a thermal conductivity of 25 W / m-K or more and a ratio of height (a) to width (b) (b / a) of 65% or more. By sufficiently covering the contact surface of the head portion 101 of the valve 100 and applying the highly heat conductive valve seat 120, the thermal energy transmitted through the head portion 101 of the valve 100 can be quickly transmitted to the cylinder head. To.
Thus, the present invention maximizes the bottom temperature reduction of the valve 100, reduces the temperature of the mixer in the combustion chamber and improves knocking, thereby improving ignition timing advance and improving engine fuel efficiency. it can.

一方、本発明は、図１に示したように、バルブ１００とバルブシート１２０のみを適用して、従来に比べてバルブ１００の温度を６４度低減させることができ、 バルブ１００とバルブガイド１１０のみを適用して、従来に比べてバルブ１００の温度を５４度低減させることもでき、バルブ１００、バルブシート１２０及びバルブガイド１１０を全て適用して、従来に比べバルブ１００の温度を６９度低減させることもできる。
その結果、本発明により、混合器の温度を低減させてエンジン点火時期進角量及び燃費を改善し、商品価値を向上させることができる。 On the other hand, in the present invention, as shown in FIG. 1, only the valve 100 and the valve seat 120 can be applied, and the temperature of the valve 100 can be reduced by 64 degrees compared to the conventional case. The temperature of the valve 100 can be reduced by 54 degrees compared to the conventional case, and the valve 100, the valve seat 120 and the valve guide 110 are all applied to reduce the temperature of the valve 100 by 69 degrees compared to the conventional case. You can also.
As a result, according to the present invention, the temperature of the mixer can be reduced, the engine ignition timing advance amount and the fuel consumption can be improved, and the commercial value can be improved.

以上のように、本発明を限定された実施例と図面により説明したが、 本発明はこれにより限定されず、本発明の属する技術分野で通常の知識を有する者により本発明の技術思想と特許請求の範囲内で多様な修正及び変形が可能なことは勿論である。 As described above, the present invention has been described with reference to limited embodiments and drawings. However, the present invention is not limited thereto, and technical ideas and patents of the present invention can be obtained by persons having ordinary knowledge in the technical field to which the present invention belongs. It goes without saying that various modifications and variations are possible within the scope of the claims.

１００ ： バルブ
１０１ ： ヘッド部
１０２ ： 軸部
１１０ ： バルブガイド
１２０ ： バルブシート 100: Valve
101: Head portion 102: Shaft portion
110: Valve guide 120: Valve seat

Claims (3)

下部に備えられた燃焼室と連通され上方に位置する軸部を含むバルブと、
前記バルブの移動をガイドするバルブガイドと、
前記バルブの燃焼室気密を保持するバルブシートと、
を含むバルブトレーンとが備えられ、
前記バルブは、中空部の体積が、バルブ全体体積の１７％以上で、かつ、前記中空部に封入される冷媒量が前記中空部の体積の６０％以上であり、前記バルブシートは、熱伝導率が２５Ｗ／ｍ−Ｋ以上であり、前記バルブガイドは、熱伝導率が１００Ｗ／ｍ−Ｋ 以上であることを特徴とするエンジンのバルブトレーン構造。 A valve including a shaft portion communicating with a combustion chamber provided in a lower portion and positioned above;
A valve guide for guiding the movement of the valve;
A valve seat that maintains the combustion chamber hermeticity of the valve;
And a valve train including
In the valve, the volume of the hollow portion is 17% or more of the entire volume of the valve, and the amount of refrigerant sealed in the hollow portion is 60% or more of the volume of the hollow portion, and the valve seat A valve train structure for an engine, wherein the valve guide has a thermal conductivity of 100 W / m-K or more. 前記バルブトレーンは、前記バルブ、または、前記バルブと前記バルブシート、または、前記バルブと前記バルブガイド、または、前記バルブと前記バルブシートと前記バルブガイドが適用されることを特徴とする請求項1記載のエンジンのバルブトレーン構造。   2. The valve train includes the valve, the valve and the valve seat, or the valve and the valve guide, or the valve, the valve seat, and the valve guide. The engine valve train structure described. 前記バルブシートは、高さ（ａ）対幅（ｂ）の割合（ｂ／ａ）が６５％以上であることを特徴とする請求項１記載のエンジンのバルブトレーン構造。   2. The valve train structure for an engine according to claim 1, wherein the valve seat has a ratio (b / a) of height (a) to width (b) of 65% or more.
JP2013258252A 2013-10-21 2013-12-13 Valve train structure of engine Pending JP2015081597A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110114559A (en) * 2016-02-17 2019-08-09 马勒国际有限公司 Internal combustion engine at least one hollow top gas door

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JPS58181910U (en) * 1982-05-31 1983-12-05 トヨタ自動車株式会社 Cylinder head for internal combustion engine
JPS59224409A (en) * 1983-06-01 1984-12-17 Toyota Motor Corp Cylinder head of internal-combustion engine
JPS60147514A (en) * 1984-01-11 1985-08-03 Toyota Motor Corp High-temperature abrasion resistant valve seat
JPH0371112U (en) * 1989-11-15 1991-07-18
JPH03170644A (en) * 1989-09-20 1991-07-24 Brico Eng Ltd Iron sintering material, valve seat insert and its manufacture
JPH06299816A (en) * 1993-04-01 1994-10-25 Eaton Corp Ultra-light poppet valve and manufacture thereof
JPH09256901A (en) * 1996-03-22 1997-09-30 Mazda Motor Corp Cylinder head structure
JPH10252424A (en) * 1998-04-20 1998-09-22 Fuji Oozx Inc Hollow valve for internal combustion engine
US6006713A (en) * 1997-08-19 1999-12-28 Trw Deutschi And Gmbh Hollow valve for internal combustion engines
JP2011179390A (en) * 2010-02-26 2011-09-15 Mitsubishi Heavy Ind Ltd Engine valve and engine using the same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58181910U (en) * 1982-05-31 1983-12-05 トヨタ自動車株式会社 Cylinder head for internal combustion engine
JPS59224409A (en) * 1983-06-01 1984-12-17 Toyota Motor Corp Cylinder head of internal-combustion engine
JPS60147514A (en) * 1984-01-11 1985-08-03 Toyota Motor Corp High-temperature abrasion resistant valve seat
JPH03170644A (en) * 1989-09-20 1991-07-24 Brico Eng Ltd Iron sintering material, valve seat insert and its manufacture
JPH0371112U (en) * 1989-11-15 1991-07-18
JPH06299816A (en) * 1993-04-01 1994-10-25 Eaton Corp Ultra-light poppet valve and manufacture thereof
JPH09256901A (en) * 1996-03-22 1997-09-30 Mazda Motor Corp Cylinder head structure
US6006713A (en) * 1997-08-19 1999-12-28 Trw Deutschi And Gmbh Hollow valve for internal combustion engines
JPH10252424A (en) * 1998-04-20 1998-09-22 Fuji Oozx Inc Hollow valve for internal combustion engine
JP2011179390A (en) * 2010-02-26 2011-09-15 Mitsubishi Heavy Ind Ltd Engine valve and engine using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110114559A (en) * 2016-02-17 2019-08-09 马勒国际有限公司 Internal combustion engine at least one hollow top gas door

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