KR100521210B1 - valve tip part of engine valve - Google Patents

valve tip part of engine valve Download PDF

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Publication number
KR100521210B1
KR100521210B1 KR10-2003-0081769A KR20030081769A KR100521210B1 KR 100521210 B1 KR100521210 B1 KR 100521210B1 KR 20030081769 A KR20030081769 A KR 20030081769A KR 100521210 B1 KR100521210 B1 KR 100521210B1
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KR
South Korea
Prior art keywords
valve
tip portion
valve tip
engine
cap
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KR10-2003-0081769A
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Korean (ko)
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KR20050047963A (en
Inventor
이덕우
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현대자동차주식회사
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Priority to KR10-2003-0081769A priority Critical patent/KR100521210B1/en
Publication of KR20050047963A publication Critical patent/KR20050047963A/en
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Publication of KR100521210B1 publication Critical patent/KR100521210B1/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
    • 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
    • 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
    • F01L1/16—Silencing impact; Reducing wear
    • 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
    • F01L2810/02—Lubrication

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

본 발명에 따른 엔진 밸브의 밸브 팁부 구조는, 캠 팔로워가 접촉하는 엔진 밸브의 밸브 팁부에 있어서, 상기 밸브 팁부(14a)에는 볼(20)이 내장된 캡(22)의 회전이 자유롭게 결합되어 있으므로, 과다한 편접촉에 의한 밸브 팁부의 마모를 방지하고 특히 저속영역의 밸브 운동시 밸브 팁부의 마모를 방지하는 효과가 있다.In the valve tip structure of the engine valve according to the present invention, since the rotation of the cap 22 having the ball 20 is freely coupled to the valve tip portion 14a of the valve tip portion of the engine valve that the cam follower contacts. In addition, there is an effect of preventing the wear of the valve tip portion due to excessive one-sided contact, and especially the wear of the valve tip portion during the valve movement in the low speed region.

Description

엔진 밸브의 밸브 팁부 구조{valve tip part of engine valve} Valve tip part of engine valve

본 발명은 엔진 밸브에 관한 것으로서, 보다 상세하게는 엔진 밸브의 밸브 팁부 구조에 관한 것이다.The present invention relates to an engine valve, and more particularly to a valve tip structure of an engine valve.

내연기관의 실린더 헤드에 결합되는 흡, 배기밸브를 여닫는 밸브 시스템은 직접 구동식과 캠 팔로워(cam follower)식이 있다. 상기 직접 구동식은 캠과 태핏이 미끄럼 접촉을 하는 구조이다. 그리고, 상기 캠 팔로워식은 로울러에 의해 캠과 캠 팔로워가 구름 접촉을 하고, 상기 캠 팔로워가 밸브 팁부에 접촉하여 밸브를 작동시키는 구조이다.The valve system for opening and closing the intake and exhaust valves coupled to the cylinder head of the internal combustion engine is a direct drive type and a cam follower type. The direct drive type has a structure in which the cam and the tappet make sliding contact. In the cam follower type, the cam and the cam follower make rolling contact with the roller, and the cam follower contacts the valve tip to operate the valve.

종래 캠 팔로워식 엔진 밸브는 도1에 도시한 바와 같이, 밸브 가이드(2)의 안내를 받아 상하로 운동하는 밸브(4)와, 상기 밸브(4)에 탄성 복원력을 가하기 위한 밸브 스프링(6)과, 상기 밸브 스프링(6)을 안착시키기 위한 리테이너(8) 등으로 구성되어 있으며, 상기 밸브(4)의 밸브 팁부(4a)에는 캠 팔로워(10)가 접촉하여 밸브를 작동시키게 되어 있다. As shown in FIG. 1, a conventional cam follower engine valve includes a valve 4 that moves up and down under the guidance of a valve guide 2, and a valve spring 6 that applies elastic restoring force to the valve 4. And a retainer 8 for seating the valve spring 6, and the cam follower 10 contacts the valve tip portion 4a of the valve 4 to operate the valve.

그런데, 상기 캠 팔로워(10)가 접촉하는 밸브 팁부(4a)는, 저, 고속의 잦은 엔진속도 변동에 따른 접촉응력의 변화에 민감하고, 접촉표면의 윤활조건 및 밸브회전 정도에 따라 마모량 및 마모 정도가 달라지며, 선접촉에 의한 마모가 항상 존재하므로, 밸브 팁부에 고주파 열처리 등을 하는 표면처리로서는 마모에 대한 근본대책이 될 수 없다는 문제점이 있었다.However, the valve tip portion 4a that the cam follower 10 contacts is sensitive to the change of contact stress caused by low and high speed frequent engine speed fluctuations, and the amount of wear and wear according to the lubrication condition and the degree of valve rotation of the contact surface Since the degree varies, and wear due to line contact is always present, there is a problem that the surface treatment of high frequency heat treatment or the like at the valve tip cannot be a fundamental measure against wear.

따라서, 본 발명은 상기 문제점을 해결하기 위해 이루어진 것으로서, 본 발명의 목적은 과다한 편접촉에 의한 밸브 팁부의 마모를 방지하고 특히 저속영역의 밸브 운동시 밸브 팁부의 마모를 방지하는 엔진 밸브의 밸브 팁부 구조를 제공하는데 있다.Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to prevent wear of the valve tip portion due to excessive one-sided contact, and in particular to prevent the wear of the valve tip portion during the valve movement of the low speed region, the valve tip portion of the engine valve. To provide structure.

상기 목적을 달성하기 위한 본 발명에 따른 엔진 밸브의 밸브 팁부 구조는, 캠 팔로워가 접촉하는 엔진 밸브의 밸브 팁부에 있어서, 상기 밸브 팁부에는 볼이 내장된 캡의 회전이 자유롭게 결합되어 있는 것을 특징으로 한다.The valve tip structure of the engine valve according to the present invention for achieving the above object, in the valve tip of the engine valve contacting the cam follower, the valve tip is characterized in that the rotation of the ball-cap cap is freely coupled do.

상기 캡의 내부 바닥면과 상기 밸브 팁부의 상단면에는 상기 볼이 접촉하여 걸리도록 오목 곡면홈이 형성되어 있다.A concave curved groove is formed in the inner bottom surface of the cap and the upper end surface of the valve tip portion so that the ball contacts and is caught.

상기 캡의 양측면에는 밸브계의 운동시 비산되는 오일이 유입되어 상기 볼의 접촉부를 윤활하도록 오일 구멍이 형성되어 있다. Oil holes are formed on both sides of the cap so that oil splashed during movement of the valve system is lubricated to lubricate the contact portion of the ball.

상기 오목 곡면홈에는 과다한 응력에 의한 마모를 방지하도록 고주파 열처리가 되어 있다.The concave curved groove is subjected to a high frequency heat treatment to prevent abrasion due to excessive stress.

이하, 첨부된 도면을 참조하여 본 발명의 실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

도2에 도시한 바와 같이 본 발명이 적용된 엔진 밸브는, 밸브 가이드(12)의 안내를 받아 상하로 운동하는 밸브(14)와, 상기 밸브(14)에 탄성 복원력을 가하기 위한 밸브 스프링(16)과, 상기 밸브 스프링(16)을 안착시키기 위한 리테이너(18) 등으로 구성되어 있으며, 상기 밸브(14)의 밸브 팁부(14a)에는 회전 자유로운 볼(20)이 내장된 캡(22)이 결합되어 있고, 상기 캡(22)의 상면에는 캠 팔로워(24)가 접촉하여 밸브를 작동시키게 되어 있다.As shown in FIG. 2, the engine valve to which the present invention is applied includes a valve 14 which moves up and down with the guidance of the valve guide 12, and a valve spring 16 for applying elastic restoring force to the valve 14. And a retainer 18 for seating the valve spring 16, and a cap 22 having a freely rotatable ball 20 is coupled to the valve tip portion 14a of the valve 14. The upper surface of the cap 22 is in contact with the cam follower 24 to operate the valve.

도3에 도시한 바와 같이, 상기 밸브 팁부(14a)의 상단면에는 상기 볼(20)이 접촉하여 걸리도록 오목 곡면홈(14b)이 형성되어 있는데, 상기 밸브 팁부(14a)는 단조 후 가공하며, 상기 오목 곡면홈(14b)에는 고주파 열처리를 실시한다.As shown in FIG. 3, a concave curved groove 14b is formed in the upper end surface of the valve tip portion 14a so that the ball 20 is in contact with the ball tip portion 14a. The valve tip portion 14a is processed after forging. The concave curved groove 14b is subjected to high frequency heat treatment.

상기 캡(22)은 상기 밸브 팁부(14a)의 상부에 회전이 자유롭게 결합되는데, 그 내부 바닥면에는 상기 볼(20)이 접촉하여 걸리도록 오목 곡면홈(22a)이 형성되어 있고, 그 양측면에는 밸브계의 운동시 비산되는 오일이 유입되어 상기 볼(20)의 접촉부를 윤활하도록 오일 구멍(22b)이 형성되어 있다. 상기 캡(22)은 SCM415 에 상당하는 내열강으로 되어 있으며, 상기 오목 곡면홈(22a)에는 과다한 응력에 의한 마모를 방지하도록 고주파 열처리를 실시한다.The cap 22 is rotatably coupled to an upper portion of the valve tip portion 14a, and a concave curved groove 22a is formed at an inner bottom thereof so that the ball 20 is in contact with and caught on both sides thereof. An oil hole 22b is formed to lubricate the contact portion of the ball 20 by flowing oil splashed during the movement of the valve system. The cap 22 is made of heat-resistant steel corresponding to SCM415, and the concave curved groove 22a is subjected to high frequency heat treatment to prevent wear due to excessive stress.

상기 볼(20) 및 캡(22)은 자유롭게 회전하도록 되어 있는데, 상기 오일 구멍(22b)를 통하여 유입되는 오일에 의해 윤활되므로 별도의 윤활기구는 필요하지 않다.The ball 20 and the cap 22 are free to rotate. Since the oil is lubricated by the oil flowing through the oil hole 22b, a separate lubrication mechanism is not necessary.

이와 같이 엔진 밸브의 밸브 팁부(14a)에 볼(20)이 내장되어 회전 자유로운 캡(22)이 씌워진 본 발명의 구조는, 과다한 편접촉에 의한 밸브 팁부의 마모를 방지하게 되는데, 특히 저속역의 밸브 운동시 밸브 캡이 회전하므로 밸브 팁부의 마찰력을 줄이고 마모를 방지한다. The structure of the present invention in which the ball 20 is embedded in the valve tip portion 14a of the engine valve and the cap 22 freely rotated prevents wear of the valve tip portion due to excessive one-sided contact. The valve cap rotates during valve movement, reducing friction on the valve tip and preventing wear.

본 발명에 의한 엔진 밸브의 밸브 팁부 구조에 의하면, 과다한 편접촉에 의한 밸브 팁부의 마모를 방지하고, 특히 저속영역의 밸브 운동시 밸브 팁부의 마찰력을 줄이고 마모를 방지하여, 연비를 향상하며 HLA(밸브간격 자동 보상기구)의 보상기능을 향상하는 효과가 있다.According to the valve tip structure of the engine valve according to the present invention, it is possible to prevent the wear of the valve tip portion due to excessive one-sided contact, and in particular, to reduce the frictional force and prevent wear of the valve tip portion during valve movement in a low speed region, thereby improving fuel economy and improving HLA ( It has the effect of improving the compensation function of the valve interval automatic compensation mechanism).

도1은 종래 엔진 밸브를 나타내는 구성도,1 is a block diagram showing a conventional engine valve,

도2는 본 발명이 적용된 엔진 밸브의 구성도,2 is a configuration diagram of an engine valve to which the present invention is applied;

도3은 도2의 A부의 상세도이다. 3 is a detailed view of portion A of FIG.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

14 : 밸브 14a : 밸브 팁부14 valve 14a valve tip portion

14b, 22a : 오목 곡면홈 20 : 볼14b, 22a: concave curved groove 20: ball

22 : 캡 22b : 오일 구멍22: cap 22b: oil hole

24 : 캠 팔로워 24: Cam Followers

Claims (4)

상기 목적을 달성하기 위한 본 발명에 따른 엔진 밸브의 밸브 팁부 구조는, 캠 팔로워가 접촉하는 엔진 밸브의 밸브 팁부에 있어서, The valve tip portion structure of the engine valve according to the present invention for achieving the above object, in the valve tip portion of the engine valve that the cam follower contact, 상기 밸브 팁부에는 볼이 내장된 캡의 회전이 자유롭게 결합되어 있는 것을 특징으로 하는 엔진 밸브의 밸브 팁부 구조.Valve tip structure of the engine valve, characterized in that the valve tip portion is freely coupled to the rotation of the ball-cap cap. 제1항에 있어서, The method of claim 1, 상기 캡의 내부 바닥면과 상기 밸브 팁부의 상단면에는 상기 볼이 접촉하여 걸리도록 오목 곡면홈이 형성되어 있는 것을 특징으로 하는 엔진 밸브의 밸브 팁부 구조.A valve tip structure of an engine valve, characterized in that a concave curved groove is formed on the inner bottom surface of the cap and the upper end surface of the valve tip portion so as to catch and contact the ball. 제1항 또는 제2항에 있어서, The method according to claim 1 or 2, 상기 캡의 양측면에는 밸브계의 운동시 비산되는 오일이 유입되어 상기 볼의 접촉부를 윤활하도록 오일 구멍이 형성되어 있는 것을 특징으로 하는 엔진 밸브의 밸브 팁부 구조. The valve tip portion structure of the engine valve, characterized in that the oil holes are formed on both sides of the cap to lubricate the contact portion of the ball flows into the oil flowing during the movement of the valve system. 제2항에 있어서, The method of claim 2, 상기 오목 곡면홈에는 과다한 응력에 의한 마모를 방지하도록 고주파 열처리가 되어 있는 것을 특징으로 하는 엔진 밸브의 밸브 팁부 구조.The concave curved groove of the valve tip portion of the engine valve, characterized in that the high-frequency heat treatment to prevent wear due to excessive stress.
KR10-2003-0081769A 2003-11-18 2003-11-18 valve tip part of engine valve KR100521210B1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR10-2003-0081769A KR100521210B1 (en) 2003-11-18 2003-11-18 valve tip part of engine valve

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KR100521210B1 true KR100521210B1 (en) 2005-10-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50135811U (en) * 1974-04-24 1975-11-08
JPS5711205U (en) * 1980-06-24 1982-01-20
JPS62179304U (en) * 1986-05-02 1987-11-14
JPH01141307A (en) * 1987-11-27 1989-06-02 Nishiyama:Kk Method and device for measuring volume
JPH0256803U (en) * 1988-10-20 1990-04-24

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50135811U (en) * 1974-04-24 1975-11-08
JPS5711205U (en) * 1980-06-24 1982-01-20
JPS62179304U (en) * 1986-05-02 1987-11-14
JPH01141307A (en) * 1987-11-27 1989-06-02 Nishiyama:Kk Method and device for measuring volume
JPH0256803U (en) * 1988-10-20 1990-04-24

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