KR20030072021A - Valve train of engine for automobiles - Google Patents

Valve train of engine for automobiles Download PDF

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Publication number
KR20030072021A
KR20030072021A KR1020020011544A KR20020011544A KR20030072021A KR 20030072021 A KR20030072021 A KR 20030072021A KR 1020020011544 A KR1020020011544 A KR 1020020011544A KR 20020011544 A KR20020011544 A KR 20020011544A KR 20030072021 A KR20030072021 A KR 20030072021A
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KR
South Korea
Prior art keywords
valve
rocker arm
cylinder head
cam
intake
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KR1020020011544A
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Korean (ko)
Inventor
오재욱
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지엠대우오토앤테크놀로지주식회사
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Priority to KR1020020011544A priority Critical patent/KR20030072021A/en
Publication of KR20030072021A publication Critical patent/KR20030072021A/en

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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE: A valve train is provided to minimize the size of a cylinder head by reducing a valve included angle between an intake valve and an exhaust valve and to improve the intake and the exhaust efficiencies by improving the compression ratio of a combustion chamber. CONSTITUTION: A locker arm shaft(400) installing a locker arm(410) is located in the outside of a cylinder head(100). A cam(310) of a cam shaft(300) is faced to a roller(411) in the center of the locker arm. A pair of tappets(412) is located inside the cylinder head and faced to stem ends(211,221) of valves(210,220). Thereby, a valve included angle(A) by the intake valve and the exhaust valve is reduced. Therefore, the size of the cylinder head is reduced.

Description

자동차 엔진의 밸브 트레인{Valve train of engine for automobiles}Valve train of engine for automobiles

본 발명은 자동차 엔진의 밸브 트레인에 관한 것으로서, 더욱 상세히는 흡기쪽 밸브와 배기쪽 밸브가 이루고 있는 밸브협각을 작게 설계하므로서, 실린더헤드의 크기를 줄여 엔진의 전체적인 크기를 작게 형성할 수 있는 것이며, 아울러 흡,배기 효율을 높여 엔진의 성능을 더욱 향상시킬 수 있도록 한 자동차 엔진의 밸브 트레인에 관한 것이다.The present invention relates to a valve train of an automobile engine, and more particularly, by designing a small valve narrow angle formed between an intake valve and an exhaust valve, the overall size of the engine can be reduced by reducing the size of the cylinder head. In addition, the present invention relates to a valve train of an automotive engine that can improve the performance of an engine by increasing intake and exhaust efficiency.

일반적으로 자동차의 엔진에 있어서 밸브는 연소실에 설치되어 공기 또는 혼합기를 실린더에 유입하고 연소가스를 배출하는 동시에 압축 및 폭발 행정에서 밸브 시트에 밀착되어 가스의 누출을 방지하는 역할을 하는 것이며, 흡입밸브와 배기밸브로 구분되고, 로커암에 의해 열린 후 밸브 스프링에 의해 닫히게 되며, 높은 열과 폭발력을 받으므로 열과 압력에 충분히 견딜 수 있어야 하고, 부식되지 않아야 하며, 열을 방출하여 이상 연소가 일어나지 않도록 해야 한다.In general, in the engine of an automobile, a valve is installed in a combustion chamber to inject air or a mixer into a cylinder and to discharge combustion gas, and to be in close contact with a valve seat in a compression and explosion stroke to prevent gas leakage. It is divided into and exhaust valve, and it is opened by rocker arm and then closed by valve spring, and because it receives high heat and explosive force, it must be able to withstand heat and pressure sufficiently, not corrode, and release heat to prevent abnormal combustion do.

그리고 밸브기구(Valve train)는 밸브를 개폐하기 위한 장치로서, 밸브, 캠축, 밸브 리프터, 푸시로드, 로커암 등으로 구성되어 있으며, 이러한 밸브기구에는 헤드밸브기구, 오버헤드밸브기구, 오버헤드캠축밸브기구, F-헤드밸브기구, 트윈캠밸브기구가 있다.And a valve train (Valve train) is a device for opening and closing the valve, it is composed of a valve, camshaft, valve lifter, push rod, rocker arm, etc., such valve mechanism head valve mechanism, overhead valve mechanism, overhead camshaft There are valve mechanism, F-head valve mechanism and twin cam valve mechanism.

한편, 도 1 은 종래의 밸브기구를 예시한 것으로서, 실린더헤드(10)의 상측에는 흡기쪽과 배기쪽에 각각 캠(31)이 구비된 캠샤프트(30)가 설치되어 있고, 상기 캠샤프트(30)의 캠(31)에는 로커암(40)의 일측 로울러(41)가 접면되어 있으며, 로커암(40)의 타측은 밸브(20a)(20b)의 스템엔드(21a)(21b)와 연결되어 있다.On the other hand, Figure 1 illustrates a conventional valve mechanism, a cam shaft 30 having a cam 31 is provided on the intake side and the exhaust side, respectively, on the upper side of the cylinder head 10, the cam shaft 30 One side roller 41 of the rocker arm 40 is in contact with the cam 31 of the), the other side of the rocker arm 40 is connected to the stem end (21a) (21b) of the valve (20a) (20b) have.

그런데 종래에는 상기 흡기쪽 밸브(20a)와 배기쪽 밸브(20b)의 축이 이루는 각도인 밸브협각(Valve included angle)(a)이 커지면서 실린더헤드(10)의 크기가 커지게 되어 엔진의 크기를 최소화시키는데 제한을 받게되는 문제점이 있었다.However, in the related art, as the valve included angle (a), which is an angle formed between the shafts of the intake valve 20a and the exhaust valve 20b, is increased, the size of the cylinder head 10 is increased to increase the size of the engine. There was a problem to be limited to minimize.

따라서 본 발명의 목적은 상기와 같은 문제점을 해결하기 위한 것으로서, 흡기쪽 밸브와 배기쪽 밸브가 이루는 밸브협각을 작게할 수 있도록 하므로서 실린더헤드의 크기를 최소화시키고 연소실의 압축비를 향상시켜 흡기 및 배기의 효율을 향상시킬 수 있도록 한 자동차 엔진의 밸브 트레인을 제공하는데 있다.Therefore, an object of the present invention is to solve the above problems, by minimizing the size of the valve head formed by the intake valve and the exhaust valve valve to minimize the size of the cylinder head and improve the compression ratio of the combustion chamber of the intake and exhaust It is to provide a valve train of an automobile engine to improve the efficiency.

이와 같은 본 발명의 목적은 자동차 엔진의 밸브 트레인을 구성함에 있어서,로커암이 축설되는 로커암샤프트를 실린더헤드의 바깥쪽으로 위치시키고, 로커암 중앙의 로울러에는 캠샤프트의 캠을 접면시키며, 로커암 안쪽에 위치한 한쌍의 태핏은 실린더헤드의 안쪽에 위치되면서 밸브의 스템엔드와 접면되도록 하므로서 달성되는 것이다.The object of the present invention is to configure the valve train of the automobile engine, the rocker arm shaft rocker arm is laid out to the outside of the cylinder head, the roller of the center of the rocker arm is in contact with the cam shaft cam, the rocker arm A pair of tappets located inside is achieved by placing them inside the cylinder head and in contact with the stem end of the valve.

이러한 본 발명은 로커암의 회전축이 실린더헤드의 바깥쪽에 위치되면서 로커암 안쪽에 밸브가 위치되어 흡기쪽 밸브와 배기쪽 밸브가 이루는 밸브협각이 작아짐에 따라 실린더헤드의 크기가 작아지면서 엔진의 크기를 작게 할 수 있고, 흡,배기효율의 향상에 의한 엔진성능의 향상효과를 얻을 수 있으므로 상기 목적을 달성할 수 있는 것이다.In the present invention, as the rotation axis of the rocker arm is located outside the cylinder head, the valve is positioned inside the rocker arm, and as the valve narrow angle formed by the intake valve and the exhaust valve becomes smaller, the size of the cylinder head is reduced and the size of the engine is reduced. The above object can be achieved because it can be made small and the effect of improving engine performance can be obtained by improving the intake and exhaust efficiency.

도 1 은 본 발명에 따른 종래의 밸브 트레인을 도시한 요부 단면도.1 is a sectional view showing main parts of a conventional valve train according to the present invention;

도 2 는 본 발명에 따른 로커암을 예시한 사시도.2 is a perspective view illustrating a rocker arm according to the present invention.

도 3 은 본 발명에 따른 밸브 트레인을 예시한 요부 단면도.3 is a cross-sectional view of main parts illustrating a valve train according to the present invention;

도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings

100 : 실린더헤드210,220 : 밸브100: cylinder head 210, 220: valve

211,221 : 스템엔드300 : 캠샤프트211,221: Stem End 300: Camshaft

310 : 캠400 : 로커암샤프트310: Cam 400: rocker arm shaft

410 : 로커암411 : 로울러410: rocker arm 411: roller

412 : 태핏412 tappet

이하, 본 발명의 특징을 효과적으로 달성할 수 있는 바람직한 실시 예로서 그 기술구성 및 작용효과를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, the technical configuration and operational effects as a preferred embodiment that can effectively achieve the features of the present invention will be described.

즉, 도 2 은 본 발명에 따른 로커암을 예시한 사시도이며, 도 3 은 본 발명에 따른 로커암 샤프트를 이용한 밸브 트레인을 예시한 요부 단면도로서, 이에 예시한 바와 같이 본 발명은 캠의 회전에 의한 로커암의 작동에 의해 흡기쪽 밸브와 배기쪽 밸브가 움직이게 되는 밸브 트레인을 구성함에 있어서,That is, FIG. 2 is a perspective view illustrating a rocker arm according to the present invention, and FIG. 3 is a cross-sectional view showing main parts of a valve train using a rocker arm shaft according to the present invention. In constructing a valve train in which the intake valve and the exhaust valve are moved by operation of the rocker arm,

로커암(410)이 축설되는 로커암샤프트(400)를 실린더헤드(100)의 바깥쪽으로 위치시키고, 로커암(410) 중앙의 로울러(411)에는 캠샤프트(300)의 캠(310)을 접면시키며, 로커암(410) 안쪽에 위치한 한쌍의 태핏(412)은 실린더헤드(100)의 안쪽에 위치시켜 밸브(210)(220)의 스템엔드(211)(221)와 접면되도록 한 밸브 트레인을 특징으로 하는 것이다.The rocker arm shaft 400 on which the rocker arm 410 is built is positioned outside the cylinder head 100, and the cam 310 of the cam shaft 300 is folded to the roller 411 in the center of the rocker arm 410. The pair of tappets 412 located inside the rocker arm 410 is positioned inside the cylinder head 100 so as to be in contact with the stem ends 211 and 221 of the valves 210 and 220. It is characterized by.

도면중 미설명 부호(A)는 밸브(210)(220)의 축이 서로 이루고 있는 밸브협각이며, (413)은 로커암(410)이 로커암샤프트(400)에 축설되기 위한 축공이다.In the drawings, reference numeral A denotes a valve narrow angle formed between the axes of the valves 210 and 220, and 413 denotes a shaft hole for the rocker arm 410 to be built on the rocker arm shaft 400.

이러한 본 발명은 흡기쪽 밸브(210)와 배기쪽 밸브(220)가 이루고 있는 밸브협각(A)을 작게 형성할 수 있도록 함에 따라 실린더헤드(100)의 크기가 작아지면서 엔진의 크기를 작고 용이하게 제작할 수 있는 것이며, 아울러 연소실이 얕고 아담하게 만들어지면서 압축비가 향상될 수 있어 흡,배기효율을 더욱 향상시킬 수 있도록 한 것이다.The present invention allows the valve inclination A formed by the intake valve 210 and the exhaust valve 220 to be made small, thereby reducing the size of the cylinder head 100 and making the engine small and easy. In addition, the compression ratio can be improved as the combustion chamber is made shallow and compact, so that the intake and exhaust efficiency can be further improved.

즉, 도 2 는 본 발명에 따른 로커암을 예시한 것으로서, 로커암(410)의 일측에는 로커암샤프트(400)가 축설되는 축공(413)이 형성되어 있으며, 타측에는 2개의 손가락이 구부러져 있는 형상으로 2개의 태핏(412)이 구성되어 있고, 상기 축공 (413)과 태핏(412)의 중앙에는 캠샤프트(300)의 캠(310)과 접면되는 로울러(411)가 설치된 것이다.That is, Figure 2 illustrates a rocker arm according to the present invention, one side of the rocker arm 410 is formed with a shaft hole 413 is formed rocker arm shaft 400, the other side is bent two fingers Two tappets 412 are formed in a shape, and the roller 411 which is in contact with the cam 310 of the cam shaft 300 is installed at the center of the shaft hole 413 and the tappet 412.

따라서 캠샤프트(300)의 회전에 의해 캠(310)이 회전운동을 하게 되면 로울러(411)에 의해 캠(310)과 접면된 로커암(410)이 작동하게 되는데, 로커암샤프트 (400)를 축 중심으로 하여 태핏(412)이 상하로 움직이게 되는 것이며, 상기 태핏 (412)의 하측에는 밸브(210)(220)의 스템엔드(211)(221)가 위치되면서 로커암(410)의 작동에 의해 밸브(210)(220)가 작동되는 것이다.Therefore, when the cam 310 is rotated by the rotation of the cam shaft 300, the rocker arm 410, which is in contact with the cam 310 by the roller 411, is operated. The rocker arm shaft 400 is operated. The tappet 412 moves up and down about the axis, and the stem ends 211 and 221 of the valves 210 and 220 are positioned below the tappet 412 to operate the rocker arm 410. By the valve 210, 220 is operated.

여기서 상기 로커암(410)의 설치상태를 도 3 을 통해 살펴보면 로커암(410)의 축공(413) 위치가 종래와는 달리 실린더헤드(100)의 바깥쪽에 위치되면서 로커암샤프트(400)에 축설되도록한 것이며, 이에 따라 로커암(410)의 태핏(412)이 실린더헤드(100)의 안쪽에 위치되므로 밸브(210)(220)의 위치 또한 실린더헤드(100)의 안쪽에 위치하게 되면서 밸브(210)(220)의 경사각이 급격해지게 되는 거이다.Here, the installation state of the rocker arm 410 will be described with reference to FIG. 3. The shaft hole 413 of the rocker arm 410 is positioned on the outer side of the cylinder head 100 unlike the prior art and is installed on the rocker arm shaft 400. Accordingly, since the tappet 412 of the rocker arm 410 is located inside the cylinder head 100, the positions of the valves 210 and 220 may also be positioned inside the cylinder head 100. The inclination angles of the 210 and 220 are sharp.

따라서 흡기쪽 밸브(210)와 배기쪽 밸브(220)가 이루고 있는 밸브협각(A)이 작아지게 되면서, 흡,배기의 공기저항을 최소화시켜 엔진의 성능을 향상시킬 수 있는 것이며, 캠(310)이 로커암(410)의 로울러(411)를 눌러주게 되면서 작동됨에 따라 최소의 마찰저항으로 2개의 밸브(210)(220)를 동시에 작동시킬 수 있는 것이며, 실린더헤드(100)의 크기를 줄여 엔진의 전체적인 크기를 작게 그리고 용이하게 제작할 수 있는 것이다.Therefore, as the valve narrow angle (A) formed between the intake valve 210 and the exhaust valve 220 becomes smaller, the air resistance of the intake and exhaust gas can be minimized, thereby improving the performance of the engine, and the cam 310. As the roller 411 of the rocker arm 410 is operated while pressing, the two valves 210 and 220 can be operated at the same time with minimal frictional resistance, thereby reducing the size of the cylinder head 100. The overall size of the can be made small and easy.

이상에서 상술한 바와 같이 본 발명은 캠의 회전에 따른 로커암의 작동에 의해 움직이게 되는 흡,배기쪽 밸브의 협각을 작게형성하므로서, 흡,배기의 공기저항을 최소화시켜 엔진의 성능을 더욱 향상시킬 수 있는 것이며, 실린더헤드의 크기를 줄여 엔진을 작은 크기로 용이하게 제작할 수 있도록 한 것이다.As described above, the present invention forms a narrow angle of the intake / exhaust valve which is moved by the operation of the rocker arm according to the rotation of the cam, thereby minimizing the air resistance of the intake / exhaust to further improve the performance of the engine. It is possible to reduce the size of the cylinder head, so that the engine can be easily manufactured in a small size.

Claims (1)

캠의 회전에 의한 로커암의 작동에 의해 흡기쪽 밸브와 배기쪽 밸브가 움직이게 되는 밸브 트레인을 구성함에 있어서,In constructing a valve train in which the intake valve and the exhaust valve are moved by the operation of the rocker arm by the rotation of the cam, 로커암(410)이 축설되는 로커암샤프트(400)를 실린더헤드(100)의 바깥쪽으로 위치시키고, 로커암(410) 중앙의 로울러(411)에는 캠샤프트(300)의 캠(310)을 접면시키며, 로커암(410) 안쪽에 위치한 한쌍의 태핏(412)은 실린더헤드(100)의 안쪽에 위치시켜 밸브(210)(220)의 스템엔드(211)(221)와 접면되도록 한 것을 특징으로 하는 자동차 엔진의 밸브 트레인.The rocker arm shaft 400 on which the rocker arm 410 is built is positioned outside the cylinder head 100, and the cam 310 of the cam shaft 300 is folded to the roller 411 in the center of the rocker arm 410. The pair of tappets 412 located inside the rocker arm 410 is positioned inside the cylinder head 100 to be in contact with the stem ends 211 and 221 of the valves 210 and 220. Valve train of a car engine.
KR1020020011544A 2002-03-05 2002-03-05 Valve train of engine for automobiles KR20030072021A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63182204U (en) * 1987-05-19 1988-11-24
JPH02126004U (en) * 1989-03-28 1990-10-17
JPH05272313A (en) * 1992-03-26 1993-10-19 Mitsubishi Motors Corp Rocker arm structure
JPH09177515A (en) * 1995-12-26 1997-07-08 Kawasaki Heavy Ind Ltd Sliding plane and its surface treating method
JP2000248913A (en) * 1999-02-26 2000-09-12 Isuzu Motors Ltd Valve system for dohc-type engine
JP2001020710A (en) * 1999-07-08 2001-01-23 Yamaha Motor Co Ltd Valve driving device for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63182204U (en) * 1987-05-19 1988-11-24
JPH02126004U (en) * 1989-03-28 1990-10-17
JPH05272313A (en) * 1992-03-26 1993-10-19 Mitsubishi Motors Corp Rocker arm structure
JPH09177515A (en) * 1995-12-26 1997-07-08 Kawasaki Heavy Ind Ltd Sliding plane and its surface treating method
JP2000248913A (en) * 1999-02-26 2000-09-12 Isuzu Motors Ltd Valve system for dohc-type engine
JP2001020710A (en) * 1999-07-08 2001-01-23 Yamaha Motor Co Ltd Valve driving device for internal combustion engine

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