KR100260211B1 - Leak down prevention apparatus for hydraulic lash adjuster - Google Patents

Leak down prevention apparatus for hydraulic lash adjuster Download PDF

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Publication number
KR100260211B1
KR100260211B1 KR1019950062205A KR19950062205A KR100260211B1 KR 100260211 B1 KR100260211 B1 KR 100260211B1 KR 1019950062205 A KR1019950062205 A KR 1019950062205A KR 19950062205 A KR19950062205 A KR 19950062205A KR 100260211 B1 KR100260211 B1 KR 100260211B1
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KR
South Korea
Prior art keywords
opening
oil
opening ball
spring
closing ball
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KR1019950062205A
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Korean (ko)
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KR970044701A (en
Inventor
김영훈
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정몽규
현대자동차주식회사
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Priority to KR1019950062205A priority Critical patent/KR100260211B1/en
Publication of KR970044701A publication Critical patent/KR970044701A/en
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Publication of KR100260211B1 publication Critical patent/KR100260211B1/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
    • F01L1/245—Hydraulic tappets
    • 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)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

PURPOSE: A leak-down preventing apparatus of an HLA(Hydraulic Lash Adjuster) is provided to restrain generation of noise due to reduction of oil by immediately supplementing oil while an engine is stopped. CONSTITUTION: A first opening ball(21) is integrated with a second opening ball(22) by connecting a connecting bar(25) to upper and lower parts of an oil inlet hole(26) of a body(20) through the first and second opening balls. A first spring(23) is combined to a plate for guiding the first opening ball, thus the first opening ball is installed elastically. By combining a second spring(24) to a plate for guiding the second opening ball, the second opening ball is installed elastically. Oil is sufficiently supplied in a lower chamber when an engine is ignited firstly after long time turn-off. Therefore, noise of a valve is restrained.

Description

H.L.A의 리크다운 방지장치H.L.A leak down prevention device

본 발명은 차량의 H.L.A(Haudric Lash Adjuster)에 관한 거으로서, 특히 열팽창을 고려하여 두 밸브의 간극을 항상 일정하게 유지시켜 초기시동시 밸브 노이즈의 발생을 억제시키도록 한 H.L.A의 리크 다운(Leak-down) 방지장치에 관한 것이다.The present invention relates to a HLA (Haudric Lash Adjuster) of the vehicle, in particular, in consideration of thermal expansion, the gap between the two valves is always kept constant so that the leakage of the HLA to suppress the generation of valve noise during the initial start-up down) prevention device.

첨부도면 제1도에 도시한 바와 같이, 종래에는 바디(10) 내부에 용기 형상으로 오일 유입구(13)를 형성하고 여기에 개폐용 볼(11)이 게재되어 있으며, 특히 상기 개폐용 볼(11)은 항상 스프링(12)의 탄성지지를 받아 윗쪽으로 올라가서 오일유입구(13)를 밀폐하도록 구성되어 있다.As shown in FIG. 1, in the related art, an oil inlet 13 is formed in a container shape in a body 10, and a ball 11 for opening and closing is placed therein, and in particular, the ball 11 for opening and closing. ) Is always configured to seal upward the oil inlet 13 to rise upwards to receive the elastic support of the spring (12).

이와 같이 이루어진 H.L.A는 엔진 시동을 걸게 되면 바디(10) 외부로부터 오일유입구(13)를 통해 오일을 공급받게 되며, 이렇게 공급받는 오일에 의해 밸브와 캠과의 사이 간격을 일정하게 유지시켜 주게 된다.The H.L.A made in this way is supplied with oil through the oil inlet 13 from the outside of the body 10 when the engine is started, and thus maintains a constant gap between the valve and the cam by the supplied oil.

그러나, 종래의 H.L.A는 엔진 시동을 끄게 되면 장시간 동안 캠이 H.L.A를 누르고 있게 되는 경우가 발생하게 되고, 그 결과 바디가 압축되면서 내부에 공급되었던 오일이 바디 외부로 빠져나가면서 리크다운 (Leak-Down) 현상이 발생하게 되고, 이 상태에서 엔진의 시동을 걸게 되면 밸브와 H.L.A 사이 간극이 달라지게 되어 이로 인하여 노이즈가 발생하게 되는 문제점이 있었다.However, in the conventional HLA, when the engine is turned off, the cam may press and hold the HLA for a long time. As a result, as the body is compressed, the oil supplied to the inside is leaked out of the body and leak-down. ) Phenomenon occurs, and when the engine is started in this state, the gap between the valve and the HLA is changed, thereby causing noise.

따라서, 본 발명은 상기한 문제점을 해소하기 위하여 창안한 것으로, 그 목적은 엔진 시동을 끈 상태에서 오일이 빠져나가면 이를 즉시 보충하여 오일의 감소로 인한 노이즈의 발생을 최대한 억제시키도록 하는 H.L.A의 리크 다운 방지장치를 제공하는데 있다.Therefore, the present invention was devised to solve the above problems, and its object is to immediately replenish the oil when the engine is turned off while the engine is turned off so that the leakage of the HLA can be suppressed as much as possible due to the reduction of the oil. It is to provide a down prevention device.

이와 같은 목적을 달성하기 위하여, 본 발명은 바디의 내부에 형성된 오일 유입구의 상하에 제1개폐용 볼과 제2개폐용 볼을 설치하되, 상기 제1개폐용 볼과 제2개폐용 볼을 오일 유입구를 통하여 연결바로 연결하여 일체형으로 형성하고, 상기 제1개폐용 볼 상부와 제2개폐용 볼의 하부에 스프링을 설치하여 제1개폐용 볼과 제2개폐용 볼을 탄력 설치되게 구성함을 그 기술적 구성상의 기본 특징으로 한다.In order to achieve the above object, the present invention is to install the first opening and closing ball and the second opening and closing ball above and below the oil inlet formed inside the body, the first opening and closing ball and the second opening and closing ball It is connected to the connection bar through the inlet to form an integral form, and the spring is installed on the upper part of the first opening and closing ball and the second opening and closing ball so that the first opening and closing ball and the second opening and closing ball are configured to be elastically installed. It is the basic characteristic in technical configuration.

제1도는 종래의 H.L.A.의 단면도.1 is a cross-sectional view of a conventional H.L.A.

제2도는 본 발명에 따른 H.L.A.의 단면도.2 is a cross-sectional view of H.L.A. in accordance with the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 바디 11 : 개폐용 볼10: body 11: opening and closing ball

12 : 스프링 13 : 오일 유입구12: spring 13: oil inlet

20 : 바디 21 : 제1개폐용 볼20: body 21: first opening and closing ball

22 : 제2개폐용 볼 23 : 제1스프링22: second opening and closing ball 23: the first spring

24 : 제2스프링 25 : 연결바24: 2nd spring 25: connection bar

26 : 오일 유입구 27 : 플랜지26 oil inlet 27 flange

28 : 내부구조물28: internal structure

이와 같이 구성된 본 발명의 실시예를 첨부된 도면을 참조하면서 상세히 설명한다.Embodiments of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

첨부도면 제2도에 도시한 바와 같이, 본 발명은 바디(20)에 형성된 오일 유입구(26)를 사이에 두고 상하에 제1개폐용 볼(21)과 제2개폐용 볼(22)을 설치하되, 상기 제1개폐용 볼(21)과 제2개폐용 볼(22)은 오일유입구(26)를 관통하는 연결바(25)의 양단에 장착되게 하며, 상기 제1개폐용 볼(21)과 제2개폐용 볼(22)의 하부와 상부에는 각각 스프링(23,24)이 게재되어 탄성지지를 받아 상하로 움직이도록 구성하여 이루어진 것이다.As shown in FIG. 2, the present invention provides a first opening / closing ball 21 and a second opening / closing ball 22 at an upper and lower side with an oil inlet 26 formed in a body 20 interposed therebetween. However, the first opening and closing ball 21 and the second opening and closing ball 22 to be mounted on both ends of the connection bar 25 through the oil inlet 26, the first opening and closing ball 21 Springs 23 and 24 are placed on the lower and upper portions of the second opening and closing ball 22 to receive the elastic support and move up and down.

이러한 본 발명의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention as follows.

상기 바디(20)의 내부에 형성된 챔버에는 소정양의 오일이 채워져 있어서 흡배기 밸브와 캠 사이의 간격을 없애 주게 되는데, 엔진이 장시간 꺼지거나 캠에 의해 바디(20)가 눌리게 되면 이 오일은 바디(10) 내부에 형성된 플랜지(27) 및 그 안에 구성된 내부구조물(28) 사이에 틈새로 리크다운(Leakdown)되는 현상이 일어나게 된다.The chamber formed inside the body 20 is filled with a predetermined amount of oil to eliminate the gap between the intake and exhaust valves and the cam. When the engine is turned off for a long time or the body 20 is pressed by the cam, the oil (10) The phenomenon of leaking down into a gap between the flange 27 formed therein and the internal structure 28 formed therein occurs.

이때, 상기 내부구조물(28)에 의해 구획된 하부 챔버의 내부압이 상대적으로 떨어지게 되며, 이에 따라 상기 제2스프링(24)의 탄성지지를 받는 제2개폐용 볼(22)이 제1개폐용 볼(21)을 아래로 밀어내게 된다.At this time, the internal pressure of the lower chamber partitioned by the internal structure 28 is relatively lowered, so that the second opening and closing ball 22 receiving the elastic support of the second spring 24 for the first opening and closing The ball 21 is pushed down.

즉, 상기 제2스프링(24)은 제1스프링(23)에 비해 상대적으로 탄성계수가 큰 것을 사용하여, 하부챔버의 내압과 제1스프링(23)의 탄성력이 제2스프링(24)의 탄성력과 힘의 평형을 이루도록 장착하게 되는데, 상기 하부챔버의 내압이 오일리크다운 현상에 의해 떨어짐에 따라 상기 제2스프링(24)이 제2개폐용 볼(22)을 아래로 밀어 내리게 되는 것이다.That is, the second spring 24 uses a relatively large elastic modulus compared to the first spring 23, so that the internal pressure of the lower chamber and the elastic force of the first spring 23 are the elastic force of the second spring 24. The second spring 24 pushes down the second opening / closing ball 22 as the internal pressure of the lower chamber falls due to the oil leakage down phenomenon.

이때, 상기 제2개폐용 볼(22)은 내압의 감소로 제2스프링(24)에 의해 아래로 내려가게 되는데, 이때의 하강속도는 후술하는 상승속도에 비해 더 빨리 이루어지게 된다.In this case, the second opening and closing ball 22 is lowered by the second spring 24 due to the decrease in the internal pressure, and the descending speed at this time is made faster than the rising speed described later.

따라서, 상기 제1개폐용 볼(22)과 연결바(25)로 연결된 제1개폐용 볼(21)도 아래로 내려가게 되고, 이렇게 상기 제1개폐용 볼(21)이 아래로 내려감에 따라 상부챔버와 하부챔버를 연통시켜 주는 오일유입구(26)가 열리게 된다.Therefore, the first opening / closing ball 21 connected to the first opening / closing ball 22 and the connection bar 25 is also lowered, and as the first opening / closing ball 21 is lowered, An oil inlet 26 for communicating the upper chamber and the lower chamber is opened.

이렇게 상기 오일유입구(26)가 열리게 되면 상부챔버에 있던 오일이 하부챔버로 유동하게 되고, 일정량의 오일이 유동으로 하부챔버의 내압이 커지면서 제2개폐용 볼(21)은 서서히 위로 올라가면서 다시 오일유입구(26)를 막게 되는 것이다.When the oil inlet 26 is opened in this way, the oil in the upper chamber flows to the lower chamber. As the internal pressure of the lower chamber increases due to the flow of a certain amount of oil, the second opening / closing ball 21 gradually rises upward and again oil. It is to block the inlet (26).

그 결과, 상기 하부챔버에 공급되어 플랜지(27)와 내부구조물(28) 사이로 리크다운된 오일량만큼 오일유입구(26)를 통해 다시 공급 받게 되어 밸브 간격을 항상 일정하게 유지시켜 주게 되는 것이다.As a result, the amount of oil supplied to the lower chamber and leaked down between the flange 27 and the internal structure 28 is supplied again through the oil inlet 26 to maintain the valve gap at all times.

이상에서 살펴본 바와 같이, 본 발명은 시동을 오프시킨 다음 장시간 후 엔진의 초기 시동시 챔버의 하부실에 오일이 충분히 공급되어 있어 밸브 노이즈의 발생을 억제시킬 수 있는 것이다.As described above, according to the present invention, since the oil is sufficiently supplied to the lower chamber of the chamber during the initial startup of the engine after a long time after the start is turned off, the generation of valve noise can be suppressed.

Claims (1)

바디의 내부에 형성된 오일 유입구의 상하에 제1개폐용 볼과 제2개폐용 볼을 오일 유입구를 통하여 연결바로 연결하여 일체형으로 형성하고, 상기 제1개폐용 볼 상부와 제2개폐용 볼 하부에 제1스프링과 제2스프링을 설치하여 구성한 것을 특징으로 하는 H.L.A의 리크 다운 방지장치.The first opening and closing ball and the second opening and closing ball are formed integrally by connecting the opening and closing ball and the second opening and closing ball through the oil inlet to the upper and lower portions of the oil inlet formed in the body, A leak down prevention device for an HLA, comprising a first spring and a second spring.
KR1019950062205A 1995-12-28 1995-12-28 Leak down prevention apparatus for hydraulic lash adjuster KR100260211B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950062205A KR100260211B1 (en) 1995-12-28 1995-12-28 Leak down prevention apparatus for hydraulic lash adjuster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950062205A KR100260211B1 (en) 1995-12-28 1995-12-28 Leak down prevention apparatus for hydraulic lash adjuster

Publications (2)

Publication Number Publication Date
KR970044701A KR970044701A (en) 1997-07-26
KR100260211B1 true KR100260211B1 (en) 2000-07-01

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