KR100242772B1 - Valve clearance adjusting device of internal combustion engine - Google Patents

Valve clearance adjusting device of internal combustion engine Download PDF

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Publication number
KR100242772B1
KR100242772B1 KR1019970080612A KR19970080612A KR100242772B1 KR 100242772 B1 KR100242772 B1 KR 100242772B1 KR 1019970080612 A KR1019970080612 A KR 1019970080612A KR 19970080612 A KR19970080612 A KR 19970080612A KR 100242772 B1 KR100242772 B1 KR 100242772B1
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South Korea
Prior art keywords
chamber
tappet
valve
rocker arm
internal combustion
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KR1019970080612A
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Korean (ko)
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KR19990060387A (en
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김규완
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정몽규
현대자동차주식회사
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Priority to KR1019970080612A priority Critical patent/KR100242772B1/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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
    • 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
    • F01L1/12—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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/04—Reducing noise

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

Abstract

본 발명은 내연기관의 밸브 간극 조정기구에 관한 것으로서, 록커 암식 밸브기구에 간단하게 부설하여 소음의 발생을 저감하고, 구조를 간단하게 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve clearance adjusting mechanism of an internal combustion engine, and is simply attached to a rocker female valve mechanism to reduce the occurrence of noise and simplify the structure.

본 발명은 록커 암 축(1)에 의하여 그 중앙이 지지되고, 일단의 대응위치에 설치된 캠(2)에 의하여 회전운동하는 록커 암(3) 타단의 밸브(6)의 밸브 스템 앤드(7)의 대응위치에 태핏 하우징(10)을 나사 결함하고, 상기 태핏 하우징(10)에 챔버(11)와 챔버(11)에 연통되는 가이드 공(12)을 형성하여 챔버(11)에 금속 나트륨과 같이 비등점이 높고 열전도성이 양호한 냉각제(13)와 코일 스프링(14)을 충전 및 내장함과 동시에 가이드 공(12)에 챔버(11)의 하부에 지지되는 지지돌기(16)가 형성된 태핏(15)을 승강할 수 있게 설치하며 상기 챔버(11)의 상부와 가이드 공(12) 사이에 순환통로(17)를 형성하고, 상기 태핏(15)에 연통로(18)를 형성하여서 된 것이다.The center of the invention is supported by the rocker arm shaft (1), the valve stem and 7 of the valve (6) of the other end of the rocker arm (3) rotated by the cam (2) installed at one end of the corresponding position The tappet housing 10 is screw-defected at a corresponding position of the tappet housing 10, and the guide hole 12 communicating with the chamber 11 and the chamber 11 is formed in the tappet housing 10, such as metal sodium in the chamber 11. A tappet 15 having filling and built-in coolant 13 and coil spring 14 having a high boiling point and good thermal conductivity and supporting protrusions 16 supported at the lower part of the chamber 11 in the guide hole 12 is formed. It is installed so that the elevating can be formed by forming a circulation passage 17 between the upper portion of the chamber 11 and the guide ball 12, and forming a communication passage 18 in the tappet 15.

Description

내연기관의 밸브 간극 조정기구Valve clearance adjustment mechanism of internal combustion engine

본 발명은 내연기관의 밸브 간극 조정기구에 관한 것이다.The present invention relates to a valve gap adjusting mechanism of an internal combustion engine.

내연기관의 밸브기구의 각 부품은 기관의 온도가 상승함에 따라 팽창되므로 밸브 헤드가 밸브 시트에 밀착되도록 함과 동시에 가스가 누설되는 것을 방지하기 위하여 밸브 간극을 설정하여 기관의 운전온도에 도달되면 알맞은 간극을 유지하도록 도 4에 도시한 바와 같이 록커 암 축(1)에 지지되고 캠(2)에 의하여 회전운동하는 록커 암(3)의 타단에 간극 조정 스크류(4)를 나사결합하고, 간극 조정 스크류(4)의 상단에 너트(5)를 체결하여 그 하단의 밸브(6)의 밸브 스템 엔드(7)와 일정간극을 유지토록 하고 있다.Each part of the valve mechanism of the internal combustion engine expands as the temperature of the engine increases, so that the valve head is brought into close contact with the valve seat and the valve gap is set to prevent gas leakage. As shown in FIG. 4, the gap adjusting screw 4 is screwed into the other end of the rocker arm 3, which is supported by the rocker arm shaft 1 and rotates by the cam 2, as shown in FIG. 4, and adjusts the gap. The nut 5 is fastened to the upper end of the screw 4 so as to maintain a constant gap with the valve stem end 7 of the valve 6 at the lower end thereof.

그러나 상기한 밸브 간극 조정기구는 밸브의 폐쇄시에 간극 조정 스크류(4)의 하단과 밸브 스템 앤드(7)와 일정간극을 유지 하였다가 밸브의 개방시에 타격하면서 개방되는 것이므로 타격 소음이 발생하고 밸브 스템 앤드의 마모가 촉진되어 수명이 단축되는 문제점이 있는 것이다.However, the valve gap adjusting mechanism maintains a constant gap with the lower end of the gap adjusting screw 4 and the valve stem and 7 when the valve is closed, and then opens when the valve is opened, thereby hitting the noise. Wear of the valve stem and end is accelerated, there is a problem that the life is shortened.

상기한 타격 소음이 발생되는 것을 방지하기 위한 직동형 동밸브 기구가 일본국 특허출원공고 평 5-44524 호 공보에 개시되어 있는 바, 상기한 직동형 동밸브 기구는 실린더 헤드에 설치되는 태핏 본체, 플런저, 시트 플런저, 첵크 밸브 및 캠을 구비함과 동시에 상기 태핏 본체에 형성된 태핏 가이드에 오일 펌프와 연통하는 작동유 도입공을 형성하여 오일 펌프에서 공급되는 작동유를 매체로 하여 캠의 회전에 따라서 흡기 또는 배기 밸브의 개폐 동작을 수행토록 한 것이다.A direct acting copper valve mechanism for preventing the occurrence of the impact noise is disclosed in Japanese Patent Application Laid-open No. 5-44524. The direct acting copper valve mechanism includes a tappet body installed in a cylinder head, A plunger, a seat plunger, a check valve, and a cam are provided, and a hydraulic oil inlet is formed in the tappet guide formed in the tappet body to communicate with the oil pump. It is to open and close the exhaust valve.

그러나 상기한 직동형 동밸브 기구는 실린더 헤드에 설치하여 캠으로 직접 구동하는 것이므로 일반적으로 많이 사용되고 있는 록커 암식 밸브기구에는 적용될 수 없고, 별도의 오일 펌프에 의하여 작동유를 공급 받음과 동시에 구조가 복잡하여 신뢰성의 확보가 곤란할 뿐 아니라 원가가 상승되는 문제점이 있는 것이다.However, the above-mentioned direct acting copper valve mechanism is installed in the cylinder head and directly driven by a cam, so it cannot be applied to a rocker female valve mechanism which is generally used, and the structure is complicated while receiving hydraulic oil by a separate oil pump. Not only is it difficult to secure reliability, but there is a problem that the cost is increased.

본 발명은 상기한 실정을 감안을 감안하여 록커 암식 밸브기구에 간단하게 부설하여 소음의 발생을 저감하고 구조를 간단하게 하며, 냉각이 양호한 내연기관의 밸브 간극 조정기구를 제공하는 것을 목적으로 한다.In view of the above circumstances, an object of the present invention is to provide a valve clearance adjusting mechanism for an internal combustion engine that is easily installed in a rocker female valve mechanism to reduce the occurrence of noise, simplify the structure, and provide good cooling.

상기한 목적을 달성하기 위하여, 본 발명은 록커 암 축에 지지되고 캠에 의하여 회전운동하는 록커 암 타단의 밸브 스템 앤드 대응위치에 태핏 하우징을 나사결합하고, 상기 태핏 하우징에 챔버와 챔버에 연통되는 가이드 공을 형성하여 챔버에 냉각재와 코일 스프링을 내장함과 동시에 가이드 공에 챔버의 하부에 지지되는 태핏을 설치하며, 챔버의 상부와 가이드 공 사이에 순환통로를 형성하고, 태핏에 연통로를 형성하여서 된 것이다.In order to achieve the above object, the present invention is screwed to the tappet housing at the valve stem and the corresponding position of the other end of the rocker arm is supported by the rocker arm shaft and rotated by the cam, the tappet housing is in communication with the chamber The guide ball is formed to embed coolant and coil spring in the chamber, and at the same time, a tappet supported at the lower part of the chamber is installed in the guide ball, and a circulation passage is formed between the upper part of the chamber and the guide ball, and a communication path is formed in the tappet. It was done.

제 1도는 본 발명의 실시예의 설치 상태도.1 is an installation state diagram of an embodiment of the present invention.

제 2도는 본 발명의 실시예의 밸브가 폐쇄 되었을 때의 확대 단면도.2 is an enlarged cross-sectional view when the valve of the embodiment of the present invention is closed.

제 3도는 본 발명의 실시예의 밸브가 개방 되었을 때의 확대 단면도.3 is an enlarged cross-sectional view when the valve of the embodiment of the present invention is opened.

제 4도는 종래의 것의 단면도.4 is a cross-sectional view of a conventional one.

* 도면의 주요부분에 사용된 부호의 설명* Explanation of symbols used in the main part of the drawing

3 : 록커 암 10 : 태핏 하우징3: rocker arm 10: tappet housing

11 : 챔버 12 : 가이드 공11: chamber 12: guide ball

13 : 냉각제 14 : 코일 스프링13: coolant 14: coil spring

15 : 태핏 16 : 지지돌기15 tappet 16: support protrusion

17 : 순환통로 18 : 연통로17: circulation passage 18: communication passage

본 발명은 도 1 내지 도 3에 도시한 바와 같이 록커 암 축(1)에 그 중앙이 지지되고, 일단의 대응위치에 설치된 캠(2)에 의하여 회전운동하는 록커 암(3) 타단의 밸브(6)의 밸브 스템 앤드(7)의 대응위치에 태핏 하우징(10)을 나사 결합하고, 상기 태핏 하우징(10)에 챔버(11)와 챔버(11)에 연통되는 가이드 공(12)을 형성하여 챔버(11)에 금속 나트륨과 같이 비등점이 높고 열전도성이 양호한 냉각재(13)를 챔버(11) 체적의 40~60% 정도로 충전하고 코일 스프링(14)을 내장함과 동시에 가이드 공(12)에 챔버(11)의 하부에 지지되는 지지돌기(16)가 형성된 태핏(15)을 승강할 수 있게 설치하며, 상기 챔버(11)의 상부와 가이드 공(12) 사이에 순환통로(17)를 형성하고, 상기 태핏(15)에 연통로(18)를 형성하여서 된 것이다.1 to 3, the center of the rocker arm shaft 1 is supported, and the valve of the other end of the rocker arm 3 which is rotated by the cam 2 installed at the corresponding position of one end ( The tappet housing 10 is screwed into a corresponding position of the valve stem end 7 of 6), and the guide hole 12 communicating with the chamber 11 and the chamber 11 is formed in the tappet housing 10. The coolant 13 having a high boiling point and good thermal conductivity, such as metallic sodium, is filled in the chamber 11 to about 40 to 60% of the volume of the chamber 11, and the coil spring 14 is built in the chamber. The tappet 15 having the support protrusion 16 supported on the lower part of the chamber 11 is installed to be elevated, and a circulation passage 17 is formed between the upper part of the chamber 11 and the guide hole 12. The communication path 18 is formed in the tappet 15.

이상과 같은 본 발명은 태핏(15)의 하단은 밸브(6)의 밸브 스템 앤드(7)에 항상 접촉된 상태를 유지하며, 캠(2)의 베이스 부분이 록커 암(3)의 일단에 위치된 상태에서는 태핏(15)은 지지돌기(16)가 챔버(11)의 하부에 지지되어 최대로 돌출된 상태를 유지함과 동시에 연통로(18)와 순환통로(17)는 차단되며, 밸브(6)는 밸브시트에서 폐쇄된 상태를 유지하는 것이다.In the present invention as described above, the lower end of the tappet 15 is always in contact with the valve stem and 7 of the valve 6, and the base portion of the cam 2 is located at one end of the rocker arm 3. In the opened state, the tappet 15 supports the support protrusion 16 at the lower portion of the chamber 11 to maintain the maximum protruding state, and at the same time, the communication path 18 and the circulation passage 17 are blocked, and the valve 6 ) Is to remain closed in the valve seat.

상기한 상태에서 캠(2)이 회전하여 그 노즈부분이 록커 암(3)의 일단에 접촉되면 록커 암(3)의 타단이 하강됨에 따라 코일 스프링(14)이 수축되면서 태핏(15)이 연통로(18)와 순환통로(17)가 일치될 때 까지 상승하고 밸브(6)는 밸브 시트에서 개방되는 것이며, 태핏(15)의 상승 스트로크는 코일 스프링(14)과 밸브 스프링(8)의 스프링 상수의 조정에 의하여 제한되는 것이다.In the above state, when the cam 2 rotates and the nose portion contacts one end of the rocker arm 3, the coil spring 14 contracts as the other end of the rocker arm 3 descends, so that the tappet 15 communicates. The furnace 18 and the circulation passage 17 are raised until they coincide with each other and the valve 6 is opened at the valve seat, and the upward stroke of the tappet 15 is a spring of the coil spring 14 and the valve spring 8. It is limited by the adjustment of the constant.

상기와 같이 태핏(15) 및 태핏 하우징(10)에 형성된 연통로(18) 및 순환통로(17)가 연통되면 냉각재(13)가 순환통로(17)로 흘러 들어가면서 챔버(11)의 체적이 축소됨과 동시에 록커 암(3)의 회전력에 의하여 연통로(18) 및 순환통로(17)를 순환하면서 챔버(11) 및 태핏 하우징(10) 등을 냉각하는 것이다.As described above, when the communication passage 18 and the circulation passage 17 formed in the tappet 15 and the tappet housing 10 communicate with each other, the coolant 13 flows into the circulation passage 17 to reduce the volume of the chamber 11. At the same time, the chamber 11, the tappet housing 10, and the like are cooled while circulating the communication path 18 and the circulation path 17 by the rotational force of the rocker arm 3.

그리고 캠(2)이 회전하여 베이스부분이 록커 암(3)의 일단에 접촉되면 상기와 같이 밸브(6)는 폐쇄되고, 태핏(15)은 밸브 스템 앤드(7)와 접촉되는 상태를 유지하는 것이다.Then, when the cam 2 rotates and the base portion contacts one end of the rocker arm 3, the valve 6 is closed as described above, and the tappet 15 maintains contact with the valve stem and 7. will be.

상기한 실시예에서는 오버 헤드 캠 축 밸브기구에 대하여 설명하였으나, 오버 헤드 밸브 기구에도 실시할 수 있음은 물론이며, 이 경우에는 밸브 간극 조정기구는 상기한 실시예의 캠 접촉부분에 설치하여 태핏이 푸쉬로드와 접촉되도록 하는 것이다.In the above-described embodiment, the overhead camshaft valve mechanism has been described. However, the overhead camshaft valve mechanism can also be implemented. In this case, the valve clearance adjusting mechanism is installed on the cam contact portion of the above-described embodiment so that the tappet is pushed. To make contact with the rod.

이상과 같이 본 발명은 록커 암식 밸브기구의 록커 암의 기존의 간극 조정 스크로 설치위치에 간단하게 설치하여 태핏과 밸브 스템 앤드의 간극에 없게 하므로서 소음의 발생을 저감하고, 그 구성을 간단하게 하였으므로 원가를 절감하여 또한 태핏 하우징과 태핏 등의 냉각을 양호하게 함과 동시에 밸브 간극을 없게 하므로서 내구성이 증대되는 것이다.As described above, the present invention is simply installed at the installation position by the existing clearance adjusting screw of the rocker arm of the rocker female valve mechanism, thereby reducing the occurrence of noise and simplifying the configuration by eliminating the gap between the tappet and the valve stem and end. The cost is reduced, and the durability of the tappet housing and the tappet can be improved while the valve gap is eliminated, and the durability is increased.

Claims (2)

록커 암 축에 지지되고 캠에 의하여 회전운동하는 록커 암 타단의 밸브 스템 앤드 대응위치에 태핏 하우징을 나사 결합하고, 상기 태핏 하우징에 챔저와 챔버에 연통되는 가이드 공을 형성하여 챔버에 냉각재와 코일 스프링을 내장함과 동시에 가이드 공에 챔버으 하부에 지지되는 태핏을 설치하며, 챔버의 상부와 가이드 공 사이에 순환통로를 형성하고, 태핏에 연통로를 형성하여서 된 내연기관의 밸브 간극 조정기구.The tappet housing is screwed into the valve stem and corresponding position at the other end of the rocker arm supported by the rocker arm shaft and rotated by the cam, and the coolant and the coil spring are formed in the chamber by forming a guide ball communicating with the chamber and the chamber in the tappet housing. At the same time to install a tappet that is supported at the bottom of the chamber in the guide ball, and to form a circulation passage between the top of the chamber and the guide ball, and to form a communication path in the tappet valve gap adjustment mechanism of the internal combustion engine. 제1항에 있어서, 태핏에 지지돌기를 형성하여 챔버의 하부에 지지한 내연기관의 밸브 간극 조정기구.The valve clearance adjusting mechanism of an internal combustion engine according to claim 1, wherein a support protrusion is formed on the tappet to support the lower portion of the chamber.
KR1019970080612A 1997-12-31 1997-12-31 Valve clearance adjusting device of internal combustion engine KR100242772B1 (en)

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KR100242772B1 true KR100242772B1 (en) 2000-03-02

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090506U (en) * 1983-11-28 1985-06-21 トヨタ自動車株式会社 Rotsuka arm with built-in hydraulic lifter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090506U (en) * 1983-11-28 1985-06-21 トヨタ自動車株式会社 Rotsuka arm with built-in hydraulic lifter

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