JP2005127310A - Internal combustion engine and cam shaft for internal combustion engine - Google Patents

Internal combustion engine and cam shaft for internal combustion engine Download PDF

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Publication number
JP2005127310A
JP2005127310A JP2004188915A JP2004188915A JP2005127310A JP 2005127310 A JP2005127310 A JP 2005127310A JP 2004188915 A JP2004188915 A JP 2004188915A JP 2004188915 A JP2004188915 A JP 2004188915A JP 2005127310 A JP2005127310 A JP 2005127310A
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Prior art keywords
internal combustion
combustion engine
intake
cylinder
cams
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Japanese (ja)
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Il Seok Yang
一 錫 楊
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Hyundai Motor Co
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Hyundai Motor Co
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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/06—Timing or lift different for valves of same cylinder

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal combustion engine that has a plurality of intake valves in a cylinder and has improved intake flow, and to provide a cam shaft for it. <P>SOLUTION: The internal combustion engine having at least one cylinder comprises first and second intake valves arranged as one cylinder and the cam shaft having a plurality of cams including first and second cams for driving the first and second intake valves, respectively. The main spindles of first and second cam lobes of the first and second cams are offset at a set offset angle, and the offset angle is less than 60°. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は内燃機関及び内燃機関用カム軸に関し、より詳しくは、シリンダー内に吸入される吸気の流動を向上させることができる、内燃機関及び内燃機関用カム軸に関する。   The present invention relates to an internal combustion engine and an internal combustion engine cam shaft, and more particularly to an internal combustion engine and an internal combustion engine cam shaft capable of improving the flow of intake air sucked into a cylinder.

最近、一つのシリンダーに複数の吸気バルブを適用するエンジンが広く用いられている。エンジンの吸気バルブの駆動はカム軸により行われ、より具体的にはカム軸に形成されたカムによって吸気バルブが駆動される。
吸気バルブの動作タイミング及び動作パターンは、カム軸のカムによって決定される。したがって、複数の吸気バルブを適用する場合、カム軸にはその吸気バルブの個数によってカムが形成される。 Recently, an engine in which a plurality of intake valves are applied to one cylinder has been widely used. The intake valve of the engine is driven by a cam shaft, and more specifically, the intake valve is driven by a cam formed on the cam shaft.
The operation timing and operation pattern of the intake valve are determined by the cam of the cam shaft. Therefore, when a plurality of intake valves are applied, a cam is formed on the cam shaft depending on the number of intake valves.

しかし、従来の技術では、一つのシリンダーに複数配置された吸気バルブを駆動するカムの形状は同一に形成されている。即ち、一つのシリンダーに複数配置された吸気バルブが同じ動作タイミングで動作することを意味する。
この際、吸気バルブを通って吸入される空気の流動（吸気流動）を向上させることができれば、エンジンの完全燃焼及び出力向上を期待することができる。
特開平１１−１０７７８８号公報 However, in the prior art, the shapes of the cams that drive a plurality of intake valves arranged in one cylinder are the same. That is, it means that a plurality of intake valves arranged in one cylinder operate at the same operation timing.
At this time, if the flow of air sucked through the intake valve (intake flow) can be improved, it is possible to expect complete combustion and improved output of the engine.
JP-A-11-107788

本発明の目的は、シリンダーに複数の吸気バルブが配置されたエンジンにおいて、吸気流動が向上する内燃機関及びそのためのカム軸を提供することにある。   An object of the present invention is to provide an internal combustion engine in which an intake flow is improved in an engine in which a plurality of intake valves are arranged in a cylinder, and a camshaft therefor.

前記目的を達成するために、本発明による内燃機関用カム軸は、一つのシリンダー用として配置される第１、２吸気バルブを各々駆動するための第１、２カムを含む複数のカムを備えたカム軸であって、前記第１、２カムの第１、２カムローブは、互いに異なる形状に形成されることを特徴とする。   To achieve the above object, an internal combustion engine camshaft according to the present invention includes a plurality of cams including first and second cams for driving first and second intake valves arranged for one cylinder, respectively. The first and second cam lobes of the first and second cams are formed in different shapes.

前記第１、２カムローブは、設定されたオフセット角度でその主軸が互いにオフセットされるのが好ましく、前記オフセット角度は、６０度未満であることが好ましい。   The main axes of the first and second cam lobes are preferably offset from each other by a set offset angle, and the offset angle is preferably less than 60 degrees.

本発明による内燃機関は、少なくとも一つのシリンダーを備えた内燃機関であって、前記一つのシリンダー用として配置される第１、２吸気バルブ；及び第１、２吸気バルブを各々駆動するための第１、２カムを含む複数のカムを備えたカム軸を含み、第１、２カムの第１、２カムローブは、互いに異なる形状に形成されることを特徴とする。   An internal combustion engine according to the present invention is an internal combustion engine having at least one cylinder, and first and second intake valves arranged for the one cylinder; and first and second intake valves for driving the first and second intake valves, respectively. The cam shaft includes a plurality of cams including one and two cams, and the first and second cam lobes of the first and second cams are formed in different shapes.

前記第１、２カムローブは、設定されたオフセット角度でその主軸が互いにオフセットされるのが好ましく、前記オフセット角度は、６０度未満であることが好ましい。   The main axes of the first and second cam lobes are preferably offset from each other by a set offset angle, and the offset angle is preferably less than 60 degrees.

本発明によると、一つのシリンダーに配置される第１、２吸気バルブの動作タイミングを異なるようにすることができるので、シリンダーに吸入される空気の吸気流動を向上させることができる。したがって、シリンダー内で空気及び燃料の混合程度を向上させることができるので、完全燃焼、有害排気ガスの低減、及びエンジンの出力向上に寄与する。   According to the present invention, since the operation timings of the first and second intake valves arranged in one cylinder can be made different, the intake air flow of the air sucked into the cylinder can be improved. Therefore, since the degree of mixing of air and fuel can be improved in the cylinder, it contributes to complete combustion, reduction of harmful exhaust gas, and improvement of engine output.

以下、本発明の実施例を、添付した図面を参照して詳細に説明する。
図２は本発明の実施例によるカム軸１００が用いられたエンジン２００の断面図であり、図１は図２のＩ−Ｉ線による断面図である。
図１及び図２に示すように、エンジン２００ではシリンダーブロック２５０とシリンダーヘッド２６０とが結合してシリンダー２０５が形成されるが、シリンダー２０５には複数の吸気バルブ、即ち第１、２吸気バルブ２１０、２２０（図２参照）が第１、２吸気ポート２６１、２６２内に各々配置される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 2 is a cross-sectional view of the engine 200 using the camshaft 100 according to the embodiment of the present invention, and FIG. 1 is a cross-sectional view taken along the line I-I of FIG.
As shown in FIGS. 1 and 2, in the engine 200, a cylinder block 250 and a cylinder head 260 are combined to form a cylinder 205. The cylinder 205 includes a plurality of intake valves, that is, first and second intake valves 210. , 220 (see FIG. 2) are disposed in the first and second intake ports 261, 262, respectively.

本発明の実施例によるカム軸１００は、このような第１、２吸気バルブ２１０、２２０を駆動するための第１、２カム１１０、１２０を備えるが、このような第１、２カム１１０、１２０は、その第１、２カムローブ１１５、１２５が互いに異なる形状に形成される。
具体的には、図１に示すように、前記第１、２カムローブ１１５、１２５は、設定されたオフセット角度（θ）でその主軸１１２、１２２が互いにオフセットして形成される。
このようなオフセット角度（θ）は、意図する吸気流動によって当業者が自明に設定することができる。但し、このような第１、２カムローブ１１５、１２５のオフセット角度（θ）は、６０度未満に形成するのが好ましい。 The cam shaft 100 according to the embodiment of the present invention includes the first and second cams 110 and 120 for driving the first and second intake valves 210 and 220. 120, the first and second cam lobes 115 and 125 are formed in different shapes.
Specifically, as shown in FIG. 1, the first and second cam lobes 115 and 125 are formed by offsetting the main shafts 112 and 122 at a set offset angle (θ).
Such an offset angle (θ) can be clearly set by those skilled in the art depending on the intended intake flow. However, it is preferable that the offset angle (θ) of the first and second cam lobes 115 and 125 is less than 60 degrees.

図２に示すように、本発明の実施例によるエンジン２００は、少なくとも一つのシリンダー２０５を備え、前記シリンダー２０５には第１、２吸気バルブ２１０、２２０が配置される。
前記第１、２吸気バルブ２１０、２２０の上部には前記カム軸１００が設置されるが、カム軸１００に形成された第１、２カム１１０、１２０は、第１、２吸気バルブ２１０、２２０を各々駆動する。 As shown in FIG. 2, an engine 200 according to an embodiment of the present invention includes at least one cylinder 205, and first and second intake valves 210 and 220 are disposed in the cylinder 205.
The cam shaft 100 is installed above the first and second intake valves 210 and 220. The first and second cams 110 and 120 formed on the cam shaft 100 are connected to the first and second intake valves 210 and 220, respectively. Are each driven.

図３乃至図５は本発明の実施例によるエンジン２００において、カム軸１００の回転によってシリンダー内で吸気流動が発生する過程を説明するための図である。
図３は本発明の実施例によるエンジン２００において、吸気行程の初期に発生する吸気流動を説明するための図である。
図４は本発明の実施例によるエンジン２００において、吸気行程の中期に発生する吸気流動を説明するための図である。
図５は本発明の実施例によるエンジン２００において、吸気行程の末期に発生する吸気流動を説明するための図である。 3 to 5 are views for explaining a process in which an intake flow is generated in the cylinder by the rotation of the camshaft 100 in the engine 200 according to the embodiment of the present invention.
FIG. 3 is a diagram for explaining the intake air flow that occurs in the early stage of the intake stroke in the engine 200 according to the embodiment of the present invention.
FIG. 4 is a diagram for explaining intake air flow generated in the middle of the intake stroke in the engine 200 according to the embodiment of the present invention.
FIG. 5 is a diagram for explaining the intake air flow generated at the end of the intake stroke in the engine 200 according to the embodiment of the present invention.

図３（ｂ）、４（ｂ）、及び５（ｂ）はシリンダー２０５、吸気バルブ２１０、２２０、及び排気バルブ３１０を図式化して示した平面図であり、図３（ａ）、４（ａ）、及び５（ａ）は各々図３（ｂ）、４（ｂ）、及び５（ｂ）のＩＩＩ−ＩＩＩ線、ＩＶ−ＩＶ線、及びＶ−Ｖ線による断面図である。   3 (b), 4 (b), and 5 (b) are plan views schematically showing the cylinder 205, the intake valves 210 and 220, and the exhaust valve 310. FIGS. ) And 5 (a) are sectional views taken along lines III-III, IV-IV, and VV in FIGS. 3 (b), 4 (b), and 5 (b), respectively.

吸気行程の初期には、図３（ａ）に示すように、カム軸１００の回転によって、まず第１カム１１０が第１吸気バルブ２１０を駆動する。したがって、第１吸気バルブ２１０が先に開き、図３（ｂ）に示すように、時計方向の吸気流動が発生する。
吸気行程の中期には、図４（ａ）に示したように、カム軸１００の回転によって、第１、２カム１１０、１２０が第１、２吸気バルブ２１０、２２０を各々駆動する。したがって、第１、２吸気バルブ２１０、２２０は同程度に開き、図４（ｂ）に示すように、吸気流動が微弱であるか形成されない。
吸気行程の末期には、図５（ａ）に示すように、カム軸１００の回転によって、第１カム１１０による第１吸気バルブ２１０の駆動は終了し、第２カム１２０による第２吸気バルブ２２０の駆動は維持される状態となる。したがって、第２吸気バルブ２２０のみが開かれ、図５（ｂ）に示すように、反時計方向の吸気流動が発生する。 In the initial stage of the intake stroke, first, the first cam 110 drives the first intake valve 210 by the rotation of the cam shaft 100 as shown in FIG. Therefore, the first intake valve 210 is opened first, and the intake air flow in the clockwise direction is generated as shown in FIG.
In the middle of the intake stroke, as shown in FIG. 4A, the first and second cams 110 and 120 drive the first and second intake valves 210 and 220 by the rotation of the cam shaft 100, respectively. Accordingly, the first and second intake valves 210 and 220 open to the same extent, and the intake flow is weak or not formed as shown in FIG.
At the end of the intake stroke, as shown in FIG. 5A, the drive of the first intake valve 210 by the first cam 110 is completed by the rotation of the cam shaft 100, and the second intake valve 220 by the second cam 120 is completed. The driving is maintained. Accordingly, only the second intake valve 220 is opened, and the counterclockwise intake flow is generated as shown in FIG. 5B.

以上、本発明に関する好ましい実施例を説明したが、本発明は前記実施例に限定されず、本発明の属する技術的範囲を逸脱しない範囲での全ての変更が含まれる。   As mentioned above, although the preferable Example regarding this invention was described, this invention is not limited to the said Example, All the changes in the range which does not deviate from the technical scope to which this invention belongs are included.

本発明の実施例によるカム軸の、図２のＩ−Ｉ線による断面図である。It is sectional drawing by the II line | wire of FIG. 2 of the cam shaft by the Example of this invention. 本発明の実施例によるカム軸が用いられた内燃機関の断面図である。1 is a cross-sectional view of an internal combustion engine using a camshaft according to an embodiment of the present invention. 本発明の実施例によるエンジンにおいて、カム軸の回転によってシリンダー内で吸気流動が発生する過程を説明するための図面であって、（ａ）は（ｂ）のＩＩＩ―ＩＩＩ線の断面図、（ｂ）は平面図で、吸気行程の初期に発生する吸気流動を説明するための図である。FIG. 3 is a view for explaining a process in which intake flow is generated in a cylinder by rotation of a camshaft in an engine according to an embodiment of the present invention, wherein (a) is a sectional view taken along line III-III in (b); b) is a plan view for explaining the intake flow generated at the beginning of the intake stroke. 本発明の実施例によるエンジンにおいて、カム軸の回転によってシリンダー内で吸気流動が発生する過程を説明するための図面であって、（ａ）は（ｂ）のＩＶ−ＩＶ線の断面図、（ｂ）は平面図で、吸気行程の中期に発生する吸気流動を説明するための図である。FIG. 4 is a view for explaining a process in which intake flow is generated in a cylinder by rotation of a camshaft in an engine according to an embodiment of the present invention, wherein (a) is a sectional view taken along line IV-IV in (b); b) is a plan view for explaining the intake flow generated in the middle of the intake stroke. 本発明の実施例によるエンジンにおいて、カム軸の回転によってシリンダー内で吸気流動が発生する過程を説明するための図面であって、（ａ）は（ｂ）のＶ−Ｖ線の断面図、（ｂ）は平面図で、吸気行程の末期に発生する吸気流動を説明するための図である。FIG. 5 is a view for explaining a process in which intake flow is generated in a cylinder by rotation of a camshaft in an engine according to an embodiment of the present invention, wherein (a) is a cross-sectional view taken along line VV in (b); b) is a plan view for explaining the intake flow that occurs at the end of the intake stroke.

符号の説明Explanation of symbols

１００ カム軸
１１０ 第１カム
１２０ 第２カム
１１２、１２２ 主軸
１１５ 第１カムローブ
１２５ 第２カムローブ
２００ エンジン
２０５ シリンダー
２１０ 第１吸気バルブ
２２０ 第２吸気バルブ
２５０ シリンダーブロック
２６０ シリンダーヘッド
２６１ 第１吸気ポート
２６２ 第２吸気ポート 100 Cam shaft 110 First cam 120 Second cam 112, 122 Main shaft 115 First cam lobe 125 Second cam lobe 200 Engine 205 Cylinder 210 First intake valve 220 Second intake valve 250 Cylinder block 260 Cylinder head 261 First intake port 262 First 2 intake ports

Claims (6)

一つのシリンダー用として配置される第１、２吸気バルブを各々駆動するための第１、２カムを含む複数のカムを備えたカム軸であって、
前記第１、２カムの第１、２カムローブは、互いに異なる形状に形成されることを特徴とする内燃機関用カム軸。 A camshaft comprising a plurality of cams including first and second cams for driving first and second intake valves respectively arranged for one cylinder;
The cam shaft for an internal combustion engine, wherein the first and second cam lobes of the first and second cams are formed in different shapes. 前記第１、２カムローブは、設定されたオフセット角度でその主軸が互いにオフセットされることを特徴とする請求項１に記載の内燃機関用カム軸。   The camshaft for an internal combustion engine according to claim 1, wherein the main shafts of the first and second cam lobes are offset from each other by a set offset angle. 前記オフセット角度は、６０度未満であることを特徴とする請求項２に記載の内燃機関用カム軸。   The cam shaft for an internal combustion engine according to claim 2, wherein the offset angle is less than 60 degrees. 少なくとも一つのシリンダーを備えた内燃機関であって、
前記一つのシリンダー用として配置される第１、２吸気バルブ；及び
第１、２吸気バルブを各々駆動するための第１、２カムを含む複数のカムを備えたカム軸を含み、
第１、２カムの第１、２カムローブは、互いに異なる形状に形成されることを特徴とする内燃機関。 An internal combustion engine comprising at least one cylinder,
A first and second intake valves arranged for the one cylinder; and a camshaft comprising a plurality of cams including first and second cams for driving the first and second intake valves,
The first and second cam lobes of the first and second cams are formed in different shapes from each other. 前記第１、２カムローブは、設定されたオフセット角度でその主軸が互いにオフセットされることを特徴とする請求項４に記載の内燃機関。   The internal combustion engine according to claim 4, wherein the main shafts of the first and second cam lobes are offset from each other by a set offset angle. 前記オフセット角度は、６０度未満であることを特徴とする請求項５に記載の内燃機関。   The internal combustion engine according to claim 5, wherein the offset angle is less than 60 degrees.
JP2004188915A 2003-10-24 2004-06-25 Internal combustion engine and cam shaft for internal combustion engine Withdrawn JP2005127310A (en)

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FR2910527A3 (en) * 2006-12-22 2008-06-27 Renault Sas Internal combustion engine for motor vehicle, has cylinder with two exhaust valves for exhausting burnt gas, where cams are arranged, such that law of lifting of exhaust valves are different
GB2531807A (en) * 2014-11-03 2016-05-04 Ford Global Tech Llc Camshaft for an engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1331942C (en) * 1986-04-16 1994-09-13 Tadashi Hanaoka Valve operating mechanism in an internal combustion engine
JP3319794B2 (en) * 1993-01-18 2002-09-03 本田技研工業株式会社 SOHC type valve train for internal combustion engine

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