KR100250538B1 - Structure for mounting valve lifter for a car - Google Patents

Structure for mounting valve lifter for a car Download PDF

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Publication number
KR100250538B1
KR100250538B1 KR1019960073004A KR19960073004A KR100250538B1 KR 100250538 B1 KR100250538 B1 KR 100250538B1 KR 1019960073004 A KR1019960073004 A KR 1019960073004A KR 19960073004 A KR19960073004 A KR 19960073004A KR 100250538 B1 KR100250538 B1 KR 100250538B1
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KR
South Korea
Prior art keywords
valve lifter
cam
valve
slant
engine
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KR1019960073004A
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Korean (ko)
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KR19980053875A (en
Inventor
우한
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정몽규
현대자동차주식회사
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Priority to KR1019960073004A priority Critical patent/KR100250538B1/en
Publication of KR19980053875A publication Critical patent/KR19980053875A/en
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Publication of KR100250538B1 publication Critical patent/KR100250538B1/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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0203—Variable control of intake and exhaust valves

Abstract

PURPOSE: Valve lifter mounting structure of a vehicle is provided to improve performance of an engine and to reduce noxious exhaust gas by making position of a valve lifter adjustable in accordance with the rpm of an engine. CONSTITUTION: A conical cam(4) is formed in a camshaft(2), and a valve lifter(6) is mounted on the cam while being formed slant to be in contact with the slant face of the cam. Recessed upper end of the valve lifter is in contact with a push rod(8). A position control unit(12) adjusting position of the valve lifter is mounted on the valve lifter to adjust opening degree of a valve(10) according to engine rpm. Upon rotation of the camshaft, a slant portion(14) of the valve lifter contacts with the slant face of the cam by friction and moves up and down. According to up and down movement of the valve lifter and the push rod, the valve is opened and shut off. At a low engine rpm, a hydraulic pump(24) of the position control unit is stopped and a mobile member(22) cannot move. Then, the slant portion of the valve lifter is placed at a right upper portion of the slant face of the cam. At high engine rpm, the hydraulic pump is operated to supply hydraulic pressure to a hydraulic cylinder(20). A piston(30) of the mobile member is pushed, and a rod(32) and an operating plate(34) are pushed to compress an elastic member(28). Then, a long side portion(16) of the valve lifter is pushed. The slant portion is lifted up along the slant face of the cam. Thereby, friction loss is reduced while cam driving power is controlled.

Description

자동차용 밸브 리프터의 장착 구조Mounting structure of automotive valve lifter

본 발명은 자동차용 밸브 리프터의 장착구조에 관한 것으로, 좀더 상세하게는 엔진의 회전 속도에 따라 밸브 리프터의 위치를 조절할 수 있도록 하여 엔진의 성능을 향상할 수 있도록 한 자동차용 밸브 리프터의 장착구조에 관한 것이다.The present invention relates to a mounting structure of a vehicle valve lifter, and more particularly, to a mounting structure of a vehicle valve lifter for improving the performance of the engine by adjusting the position of the valve lifter according to the rotational speed of the engine. It is about.

일반적으로 자동차용 엔진에 있어서, 밸브기구는 흡기 밸브와 배기 밸브를 일정한 시기에 정확하게 개폐하여 공기와 연료가 실린더내로 유입될 수 있게 하는 기구이다.In general, in the engine for automobiles, the valve mechanism is a mechanism that allows the air and fuel to flow into the cylinder by opening and closing the intake valve and the exhaust valve accurately at a predetermined time.

이러한 밸브기구는 캠축, 밸브 리프터, 푸시로드, 밸브, 로커 아암등으로 구성되어 있다.This valve mechanism is composed of a camshaft, a valve lifter, a push rod, a valve, a rocker arm, and the like.

상기한 밸브 리프터는 캠축의 회전운동을 상,하운동으로 바꾸어 푸시로드에 전달하기 위한 것으로, 이러한 밸브 리프터의 장착구조를 살펴보면 종래에는 제2도에서 도시한 바와 같다.The valve lifter is to transfer the rotational movement of the camshaft to the up and down movement to the push rod, looking at the mounting structure of such a valve lifter as shown in Figure 2 conventionally.

즉, 밸브 리프터(102)는 그 하단면이 캠(104)과 접촉되며 또한 그 상단면에 요입 형성되어 오목하게 이루어진 시이트(106)에 푸시로드(108)가 접촉되어 있다.In other words, the valve lifter 102 is in contact with the cam 104 and the bottom surface thereof is in contact with the cam 104 and the push rod 108 is in contact with the concave sheet 106.

이에 따라 캠축(110)이 회전되면, 태핏(102)은 캠(104)과 마찰 접촉되면서 상,하로 이동하게 되고, 상기 태핏(102)의 상,하 이동에 따라 시이트(106)에 마찰접촉되는 푸시로드(107)가 상,하로 이동하면서 밸브(112)를 열고 닫아주게 되는 것이다.Accordingly, when the cam shaft 110 is rotated, the tappet 102 is moved up and down while being in frictional contact with the cam 104, and the tappet 102 is frictionally contacted with the sheet 106 according to the up and down movement of the tappet 102. The push rod 107 moves up and down to open and close the valve 112.

그러나 종래에는 밸브 리프터가 캠축의 회전에 의하여 일정하게 상,하로 이동하여 엔진의 회전속도가 저속과 고속시에도 항상 일정한 마찰 손실 및 캠 구동력을 갖게 되므로 엔진의 성능이 저하됨은 물론 유해 배기가스를 배출하게 되는 문제점이 있었다.However, in the related art, the valve lifter is constantly moved up and down by the rotation of the camshaft so that even when the engine rotational speed is low and high speed, the engine always has a constant friction loss and cam driving force. There was a problem.

따라서 본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 엔진의 회전 속도에 따라 밸브 리프터의 위치를 조절할 수 있도록 하여 엔진의 성능을 향상할 수 있도록 하고, 유해 배기가스를 저감하기 위한 자동차용 밸브 리프터의 장착구조를 제공하는데 있다.Therefore, the present invention has been made to solve the above problems, the object of the present invention is to adjust the position of the valve lifter according to the rotational speed of the engine to improve the performance of the engine, and to reduce harmful emissions To provide a mounting structure of the valve lifter for automobiles to.

상기의 목적을 달성하기 위하여 본 발명은, 캠축에 소정의 각도로 경사지게 형성된 원추형상의 캠과; 상기 캠의 경사면에는 이와 접촉되기 위하여 소정의 각도로 경사지게 형성된 밸브 리프터와; 상기 밸브 리프터에 장착되어 엔진의 회전속도에 따라 밸브의 열림량을 조절할 수 있도록 밸브 리프터의 위치를 조절하기 위한 위치조절수단으로 이루어짐을 특징으로 한다.In order to achieve the above object, the present invention is a cam-shaped cam formed inclined at a predetermined angle on the cam shaft; A valve lifter formed on the inclined surface of the cam to be inclined at a predetermined angle so as to contact the cam It is mounted to the valve lifter is characterized in that consisting of a position adjusting means for adjusting the position of the valve lifter to adjust the opening amount of the valve in accordance with the rotational speed of the engine.

이에 따라 엔진의 회전속도가 일정 속도이상의 고속에서는 전자제어수단에 의하여 위치조절수단을 작동시켜 밸브 리프트를 일방으로 밀어준다.Accordingly, when the rotation speed of the engine is higher than a certain speed, the position control means is operated by the electronic control means to push the valve lift to one side.

상기 밸브 리프터는 캠의 경사면을 따라 상승하면서 위치를 이동하게 되어 마찰 손실 및 캠 구동력이 증가하게 되는 것이다.The valve lifter moves along the inclined surface of the cam to move its position, thereby increasing friction loss and cam driving force.

제1도는 본 발명에 따른 자동차용 밸브 리프터의 장착구조를 도시한 단면도.1 is a cross-sectional view showing a mounting structure of a valve lifter for automobiles according to the present invention.

제2도는 종래 기술에 의한 자동차용 밸브 리프터의 장착구조를 도시한 단면도이다.2 is a cross-sectional view showing a mounting structure of a valve lifter for automobiles according to the prior art.

이하, 첨부 도면을 참조하여 본 발명의 바람직한 일실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명에 따른 자동차용 밸브 리프터의 장착구조를 도시한 단면도이다.1 is a cross-sectional view showing a mounting structure of a valve lifter for automobiles according to the present invention.

엔진 밸브기구의 캠축(2)에는 소정의 각도로 경사지게 형성된 원추형상의 캠(4)이 이루어진다.The camshaft 2 of the engine valve mechanism is formed with a conical cam 4 formed to be inclined at a predetermined angle.

상기 캠(4)의 경사면에는 이와 접촉되기 위하여 소정의 각도로 경사지게 형성된 밸브 리프터(6)가 장착되어 이루어진다.The inclined surface of the cam 4 is equipped with a valve lifter 6 formed to be inclined at a predetermined angle so as to contact the cam 4.

상기 밸브 리프터(6)는 그 상단면이 요입 형성되어 오목하게 이루어진 시이트에 푸시로드(8)가 접촉되어 있다.In the valve lifter 6, the push rod 8 is in contact with a sheet which is recessed at its upper end surface.

상기 밸브 리프터(6)에는 엔진의 회전속도에 따라 밸브(10)의 열림량을 조절할 수 있도록 밸브 리프터(5)의 위치를 조절하기 위한 위치조절수단(12)이 장착되어 이루어진다.The valve lifter 6 is equipped with a position adjusting means 12 for adjusting the position of the valve lifter 5 so as to adjust the opening amount of the valve 10 according to the rotational speed of the engine.

상기 밸브 리프터(6)는 캠(4)과 접촉되기 위하여 소정각도로 경사지게 형성된 경사부(14)와, 상기 경사부의 일단에 수직방향으로 형성된 소정길이의 장변부(16)와, 경사부의 타단에 수직방향으로 형성된 소정길이의 단변부(18)를 포함하여 이루어진다.The valve lifter 6 has an inclined portion 14 formed to be inclined at a predetermined angle to contact the cam 4, a long side portion 16 having a predetermined length formed in a direction perpendicular to one end of the inclined portion, and the other end of the inclined portion. It comprises a short side portion 18 of a predetermined length formed in the vertical direction.

상기 위치조절수단(12)은 그 내부에 오일이 채워진 소정크기의 유압실린더(20)와: 상기 유압실린더내에 장착되고 밸브 리프터(6)의 장변부(16)를 이동시켜주기 위한 이동부재(22)와; 상기 이동부재에 유압을 가해주기 위한 유압펌프(24)와; 상기 밸브 리프터(6)의 단변부(18)와 고정부재(26)의 사이에 탄지되고 이동부재(22)에 의하여 이동된 장변부(16)를 원래의 위치로 복귀시켜 주기 위한 탄성부재(28)를 포함하여 이루어진다The position adjusting means 12 is a hydraulic cylinder 20 of a predetermined size filled with oil therein and: a moving member 22 mounted in the hydraulic cylinder and moving the long side portion 16 of the valve lifter 6. )Wow; A hydraulic pump 24 for applying hydraulic pressure to the moving member; An elastic member 28 for returning the long side portion 16, which is carried between the short side portion 18 and the fixing member 26 of the valve lifter 6 and moved by the moving member 22, to its original position. Is made including

상기 이동부재(22)는 유압펌프(24)에 의하여 펌핑되는 유압에 의하여 작동되는 피스톤(30)과; 상기 피스톤(30)에 연동되게 연결된 로드(32)에 의하여 밸브 리프터(6)의 장변부(16)를 일방으로 밀어주기 위한 작동판(34)으로 이루어진다.The moving member 22 includes a piston 30 which is operated by hydraulic pressure pumped by the hydraulic pump 24; It consists of a working plate 34 for pushing the long side portion 16 of the valve lifter 6 to one side by a rod 32 linked to the piston 30.

상기 유압펌프(24)는 전자제어수단(미도시)에 의하여 엔진의 회전 속도에 따라 제어될 수 있도록 연결된다.The hydraulic pump 24 is connected to be controlled according to the rotational speed of the engine by an electronic control means (not shown).

이에 따라 캠축(2)이 회전되면, 밸브 리프터(6)의 경사부(14)는 캠(4)의 경사면과 마찰 접촉되면서 상,하로 이동하게 되고, 상기 밸브 리프터(6)의 상,하 이동에 따라 시이트에 마찰 접촉되는 푸시로드(8)가 상,하로 이동하면서 밸브(10)를 열고 닫아주게 되는 것이다.Accordingly, when the cam shaft 2 is rotated, the inclined portion 14 of the valve lifter 6 moves up and down while frictionally contacting the inclined surface of the cam 4, and the up and down movement of the valve lifter 6 is performed. As a result, the push rod 8 in frictional contact with the sheet moves up and down to open and close the valve 10.

이때, 엔진의 회전 속도가 일정 속도이하의 저속에서는 전자제어수단에 의하여 위치조절수단(12)의 유압펌프(24)의 작동을 정지함에 따라 이동부재(22)가 작동되지 않게 되어 밸브 리프터(6)의 경사부(14)는 제1도에서의 일점쇄선의 위치와 같이 캠(4)의 경사면 직상측으로 위치하게 되어 마찰 손실 및 캠 구동력이 저감되는 것이다.At this time, when the rotational speed of the engine is lower than the predetermined speed, the moving member 22 is not operated by stopping the operation of the hydraulic pump 24 of the position adjusting means 12 by the electronic control means, so that the valve lifter 6 ), The inclined portion 14 is positioned directly above the inclined surface of the cam 4, such as the position of the dashed-dotted line in FIG. 1, so that friction loss and cam driving force are reduced.

또한 엔진의 회전속도가 일정 속도이상의 고속에서는 전자제어수단에 의하여 위치조절수단(12)의 유압펌프(24)를 작동시켜 유압실린더(20)로 유압을 공급하게 된다.In addition, when the rotation speed of the engine is higher than a certain speed, the hydraulic pump 24 of the position adjusting means 12 is operated by the electronic control means to supply the hydraulic pressure to the hydraulic cylinder 20.

상기 유압실린더(20)로 유압을 공급하게 되면 이동부재(22)의 피스톤(30)을 일방으로 밀어주고, 상기 피스톤(30)이 밀림에 따라 로드(32)와 작동판(34)이 일방으로 밀리면서 탄성부재(28)를 압축하면서 밸브 리프터(6)의 장변부(16)를 일방으로 밀어주게 된다.When the hydraulic pressure is supplied to the hydraulic cylinder 20, the piston 30 of the moving member 22 is pushed to one side, and the rod 32 and the operating plate 34 are moved to one side as the piston 30 is pushed. While pushing, the long side portion 16 of the valve lifter 6 is pushed to one side while compressing the elastic member 28.

상기 밸브 리프터(6)의 경사부(14)는 캠(4)의 경사면을 따라 상승하면서 제1도에서의 실선의 위치로 이동하게 되어 마찰 손실 및 캠 구동력이 증가하게 되는 것이다.The inclined portion 14 of the valve lifter 6 moves along the inclined surface of the cam 4 to the position of the solid line in FIG. 1, thereby increasing friction loss and cam driving force.

이와 같이 본 발명은 엔진의 회전 속도에 따라 밸브 리프터의 위치를 조절할 수 있도록 하여 엔진의 성능을 향상할 수 있도록 하고, 유해 배기가스를 저감하는 효과가 있는 것이다.As described above, the present invention can adjust the position of the valve lifter according to the rotational speed of the engine, thereby improving the performance of the engine, and reducing the harmful exhaust gas.

Claims (2)

캠축에 소정의 각도로 경사지게 형성된 원추형상의 캠과, 상기 캠의 경사면에는 이와 접촉되기 위하여 소정의 각도로 경사지게 형성된 밸브 리프터와, 상기 밸브 리프터에 장착되어 엔진의 회전속도에 따라 밸브의 열림량을 조절할 수 있도록 밸브 리프터의 위치를 조절하기 위한 위치조절수단으로 이루어지는 자동차용 밸브 리프트에 있어서, 상기 밸브 리프터는 캠과 접촉되기 위하여 소정각도로 경사지게 형성된 경사부와; 상기 경사부의 일단에 수직방향으로 형성된 장변부와; 상기 경사부의 타단에 수직방향으로 형성된 단변부를 포함하여 이루어지고, 상기 위치 조절수단은 그 내부에 오일이 채워진 소정크기의 유압실린더와; 상기 유압 실린더 내에 장착되고 밸브 리프터의 장변부를 이동시켜 주기 위한 이동부재와; 상기 이동부재에 유압을 가해주기 위한 유압펌프와; 상기 밸브 리프터의 단변부와 고정부재의 사이에 탄지되고, 이동부재에 의하여 이동된 장변부를 원래의 위치로 복귀시켜 주기 위한 탄성부재를 포함하여 이루어짐을 특징으로 하는 자동차용 밸브 리프터의 장착구조.A conical cam formed to be inclined at a predetermined angle on the camshaft, a valve lifter formed to be inclined at a predetermined angle to be in contact with the inclined surface of the cam, and mounted to the valve lifter to adjust the opening amount of the valve according to the rotational speed of the engine An automobile valve lift comprising position adjusting means for adjusting a position of a valve lifter, the valve lifter comprising: an inclined portion formed to be inclined at a predetermined angle to be in contact with a cam; A long side portion formed in a direction perpendicular to one end of the inclined portion; It comprises a short side formed in the vertical direction to the other end of the inclined portion, wherein the position adjusting means and the hydraulic cylinder of a predetermined size filled with oil therein; A moving member mounted in the hydraulic cylinder and configured to move the long side of the valve lifter; A hydraulic pump for applying hydraulic pressure to the moving member; And a resilient member which is carried between the short side portion of the valve lifter and the fixed member and returns the long side portion moved by the moving member to its original position. 제1항에 있어서, 상기 이동부재는 유압펌프에 의하여 펌핑되는 유압에 의하여 작동되는 피스톤과; 상기 피스톤에 연동되게 연결된 로드에 의하여 밸브 리프터의 장변부를 일방으로 밀어주기 위한 작동판으로 이루어짐을 특징으로 하는 자동차용 밸브 리프터의 장착구조.According to claim 1, The moving member is a piston operated by hydraulic pressure pumped by a hydraulic pump; The mounting structure of the valve lifter for a vehicle, characterized in that made of a working plate for pushing the long side portion of the valve lifter in one direction by a rod connected to the piston.
KR1019960073004A 1996-12-27 1996-12-27 Structure for mounting valve lifter for a car KR100250538B1 (en)

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KR1019960073004A KR100250538B1 (en) 1996-12-27 1996-12-27 Structure for mounting valve lifter for a car

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KR100250538B1 true KR100250538B1 (en) 2000-04-01

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332045A (en) * 1994-06-08 1995-12-19 Mazda Motor Corp Valve timing controller of engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332045A (en) * 1994-06-08 1995-12-19 Mazda Motor Corp Valve timing controller of engine

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