KR100248335B1 - Valve train - Google Patents
Valve train Download PDFInfo
- Publication number
- KR100248335B1 KR100248335B1 KR1019960066729A KR19960066729A KR100248335B1 KR 100248335 B1 KR100248335 B1 KR 100248335B1 KR 1019960066729 A KR1019960066729 A KR 1019960066729A KR 19960066729 A KR19960066729 A KR 19960066729A KR 100248335 B1 KR100248335 B1 KR 100248335B1
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- hydraulic
- oil
- rocker shaft
- supplied
- Prior art date
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Classifications
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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
- F01L1/2416—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device attached to an articulated rocker
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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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
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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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L2013/11—Sensors for variable valve timing
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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
- F01L2201/00—Electronic control systems; Apparatus or methods therefor
Abstract
본 발명의 목적은 엔진의 운전조건에 적합하게 밸브의 리프트량을 가변적으로 조정하게 되는 밸브 트레인 기구를 제공하는 데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a valve train mechanism that variably adjusts the lift amount of a valve in accordance with an engine operating condition.
상기한 목적을 달성하기 위하여 본 발명은The present invention to achieve the above object
밸브와;A valve;
밸브를 작동하기 위한 로커암과;A rocker arm for operating the valve;
로커암을 로커축을 중심점으로 회동작동하기 위한 캠과;A cam for rotating the rocker arm about a rocker axis;
상기 로커축을 지지하고 있으며 내부의 유압실에 유압이 공급될 때에는 상기 로커축을 들어올려 밸브의 리프트량을 증가시키고 공급된 유압이 빠져나갈때에는 상기 로커축을 하강시켜 밸브 리프트량을 증가시키도록 설치되는 유압기구와;The hydraulic fluid is installed to support the rocker shaft and to increase the lift amount of the valve by lifting the rocker shaft when the hydraulic pressure is supplied to the internal hydraulic chamber, and to lower the rocker shaft when the supplied hydraulic pressure is discharged. An appliance;
상기 유압기구에 메인 갤러리로부터 유압을 공급하는 오일공급 라인과;An oil supply line for supplying hydraulic pressure from the main gallery to the hydraulic mechanism;
상기 유압기구에 공급된 오일을 리턴시키는 오일리턴 라인과;An oil return line for returning oil supplied to the hydraulic mechanism;
상기 오일공급 및 리턴라인을 선택적으로 개폐하도록 작동되는 삼방향 솔레노이드 밸브와;A three-way solenoid valve operable to selectively open and close the oil supply and return lines;
엔진의 저속 저부하 운전시에는 상기 솔레노이드 밸브에 전원을 공급하여 오일공급라인을 개방하고 오일리턴라인을 차단토록 제어하며 엔진의 고속, 고부하 운전시에는 상기 솔레노이드 밸브의 전원공급을 차단하여 오일리턴라인은 개방하고 오일공급라인은 차단하도록 제어하는 전자제어장치와;를 포함하여 구성되는 것을 특징으로 한다.In low speed low load operation of the engine, the solenoid valve is supplied with power to open the oil supply line and control the oil return line to be shut off.In the high speed and high load operation of the engine, the solenoid valve is cut off to supply the oil return line. It is characterized in that it comprises a; and an electronic control device for controlling to open and the oil supply line is blocked.
Description
본 발명은 흡배기 밸브를 개폐하는 밸브의 리프트량이 엔진 운전조건에 따라가변조정 되는 밸브 트레인 기구에 관한 것이다.The present invention relates to a valve train mechanism in which a lift amount of a valve for opening and closing an intake and exhaust valve is variablely adjusted according to engine operating conditions.
흡배기 포트를 개폐하기 위한 밸브는 캠과 캠축 및 로커암등으로 구성된 밸브 트레인 기구나 또는 밸브 클리어런스를 영으로 유지하는 유압밸브 리프터를 구비한 밸브 트레인에 의해 작동되어지고 있다.The valve for opening and closing the intake and exhaust ports is operated by a valve train mechanism composed of a cam, a camshaft, a rocker arm, or the like, or a valve train having a hydraulic valve lifter for keeping the valve clearance to zero.
그러나 종래의 경우 상기한 어느 방식이나 엔진의 다양한 운전조건, 예를들면 엔진의 rpm이나 부하정도에 따라 밸브의 리프량을 조절할 수 있는 방식이 아니어서 엔진의 성능 및 연비 향상에 효율적이지 못하다는 문제점이 지적되고 있다.However, the conventional method is not effective in improving the performance and fuel efficiency of the engine because it is not a method of adjusting the leaf amount of the valve according to the various operating conditions of the engine, for example, the engine rpm or load. This is being pointed out.
즉 저속 저부하 운전 조건하에서는 연소실에 도입되는 혼합기량이 적어져야 하기 때문에 흡기 밸브의 리프트량(열림량)이 작은 것이 유리하고, 고속 고부하 조건에서는 큰 출력을 얻기 위하여 많은 혼합기가 연소실로 도입되기 위해서 밸브의 리프트량이 커지는 것이 유리하다.That is, it is advantageous that the lift amount (opening amount) of the intake valve is small because the amount of the mixer introduced into the combustion chamber should be small under low speed and low load operating conditions, and in order to obtain a large output under the high speed and high load conditions, many mixers are introduced into the combustion chamber. It is advantageous for the lift amount of the valve to be large.
그럼에도 불구하고 종래의 경우 엔진의 운전조건과 상관없이 밸브의 리프트량이 항상 일정하고 혼합기의 도입량만을 스로틀밸브 등을 조작하여 조정하게 되므로써 비효율적이게 된다.Nevertheless, in the conventional case, the lift amount of the valve is always constant regardless of the operating conditions of the engine, and only the introduction amount of the mixer is adjusted by manipulating the throttle valve or the like to be inefficient.
이에 본 발명은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 바는Accordingly, the present invention has been proposed in view of the above problems, and has as its object
엔진의 운전조건에 적합하게 밸브의 리프트량을 가변적으로 조정하게 되는 밸브 트레인 기구를 제공하는 데 있다.The present invention provides a valve train mechanism that variably adjusts the lift amount of a valve in accordance with an engine operating condition.
상기한 목적을 달성하기 위하여 본 발명은The present invention to achieve the above object
밸브와;A valve;
밸브를 작동하기 위한 로커암과;A rocker arm for operating the valve;
로커암을 로커축을 중심점으로 회동작동하기 위한 캠과;A cam for rotating the rocker arm about a rocker axis;
상기 로커축을 지지하고 있으며 내부의 유압실에 유압이 공급될 때에는 상기 로커축을 들어올려 밸브의 리프트량을 증가시키고 공급된 유압이 빠져나갈때에는 상기 로커축을 하강시켜 밸브 리프트량을 증가시키도록 설치되는 유압기구와;The hydraulic fluid is installed to support the rocker shaft and to increase the lift amount of the valve by lifting the rocker shaft when the hydraulic pressure is supplied to the internal hydraulic chamber, and to lower the rocker shaft when the supplied hydraulic pressure is discharged. An appliance;
상기 유압기구에 메인 갤러리로부터 유압을 공급하는 오일공급 라인과;An oil supply line for supplying hydraulic pressure from the main gallery to the hydraulic mechanism;
상기 유압기구에 공급된 오일을 리턴시키는 오일리턴 라인과;An oil return line for returning oil supplied to the hydraulic mechanism;
상기 오일공급 및 리턴라인을 선택적으로 개폐하도록 작동되는 삼방향 솔레노이드 밸브와;A three-way solenoid valve operable to selectively open and close the oil supply and return lines;
엔진의 저속 저부하 운전시에는 상기 솔레노이드 밸브에 전원을 공급하여 오일공급라인을 개방하고 오일리턴라인을 차단토록 제어하며 엔진의 고속, 고부하 운전시에는 상기 솔레노이드 밸브의 전원공급을 차단하여 오일리턴라인은 개방하고 오일공급라인은 차단하도록 제어하는 전자제어장치와;를 포함하여 구성되는 것을 특징으로 한다.In low speed low load operation of the engine, the solenoid valve is supplied with power to open the oil supply line and control the oil return line to be shut off.In the high speed and high load operation of the engine, the solenoid valve is cut off to supply the oil return line. It is characterized in that it comprises a; and an electronic control device for controlling to open and the oil supply line is blocked.
도 1은 본 발명에 의한 밸브 트레인 기구를 나타내는 도면1 is a view showing a valve train mechanism according to the present invention.
※ 도면 중 주요 부분에 대한 부호의 설명※ Explanation of the code for the main part of the drawing
1 : 밸브 2 : 로커암1: valve 2: rocker arm
3 : 로커축 4 : 캠3: rocker shaft 4: cam
5 : 유압기구 6 : 저압플런저5: hydraulic mechanism 6: low pressure plunger
7 : 원통형바디 8 : 플런저시트부7: cylindrical body 8: plunger seat
9 : 저압실 10 : 오일통로9: low pressure chamber 10: oil passage
11 : 오일공급라인 12 : 메인갤러리11: Oil Supply Line 12: Main Gallery
13 : 오일리턴라인 14 : 릴리프스프링13: oil return line 14: relief spring
15 : 체크볼 16 : 리테이너15: check ball 16: retainer
17 : 리턴스프링 18 : 고압실17: return spring 18: high pressure chamber
19 : 삼방향 솔레노이드 밸브 20 : 전자제어장치19: three-way solenoid valve 20: electronic control device
21 : 로커축지지캠 22 : 차속센서21: rocker shaft support cam 22: vehicle speed sensor
23 : 엔진 rpm센서 24 : TPS센서23: engine rpm sensor 24: TPS sensor
이하 본 발명의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.
도1은 본 발명에 의한 밸브 트레인 기구를 나타내는 도면으로 도면중 부호 1은 흡배기포트를 개폐하는 밸브이다.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a valve train mechanism according to the present invention, in which 1 is a valve for opening and closing an intake and exhaust port.
상기 밸브(1)는 로커암(2)의 로커축(3)을 중심점으로 한 회동작동에 의해 상하로 운동하여 개폐작동되며 로커암(2)의 일측단부에는 회동작동을 위한 캠(4)이 설치되어 있다.The valve 1 is moved up and down by a rotational operation with the rocker shaft 3 of the rocker arm 2 as a center point, and is opened and closed. A cam 4 for a rotational operation is provided at one end of the rocker arm 2. It is installed.
그리고 상기 밸브(1)와 캠(4) 사이에는 유압기구(5)가 설치되며 유압기구(5)의 저압플런저(6)는 로커축(3)에 계합되어 있다. 원통형 바디(7)내에는 상기 저압플런저(6)와 플런저 시트부(8)가 수용되며 양측사이에는 저압실(9)이 형성된다.A hydraulic mechanism 5 is installed between the valve 1 and the cam 4, and the low pressure plunger 6 of the hydraulic mechanism 5 is engaged with the rocker shaft 3. The low pressure plunger 6 and the plunger seat portion 8 are accommodated in the cylindrical body 7 and a low pressure chamber 9 is formed between both sides.
상기 저압실(9)은 저압플런저(6)와 원통바디(7)에 형성된 오일통로(10)를 통해 오일공급라인(11)에 접속되어 메인갤러리(12)로부터 오일이 공급되거나 또는 오일공급라인(11)에 분기 접속된 오일리턴라인(13)을 통해 공급된 오일이 빠져나가게 된다.The low pressure chamber 9 is connected to the oil supply line 11 through the oil passage 10 formed in the low pressure plunger 6 and the cylindrical body 7 so that oil is supplied from the main gallery 12 or the oil supply line is provided. The oil supplied through the oil return line 13 branched to (11) exits.
상기 플런저 시트부(8)에는 릴리프스프링(14)에 의해 지지되는 체크볼(15)이 밀착되어 있으며 릴리프스프링(14)을 지지하는 리테이너(16)는 리턴스프링(17)에 의해 원통바디(7)에 대하여 지지되어진다.The plunger seat portion 8 is in close contact with the check ball 15 supported by the relief spring 14 and the retainer 16 supporting the relief spring 14 is a cylindrical body 7 by the return spring 17. Is supported.
그리고 상기 플런저시트부(8)와 리테이너(16) 사이에는 고압실(18)이 형성된다.The high pressure chamber 18 is formed between the plunger seat portion 8 and the retainer 16.
상기 오일공급라인(11)과 오일리턴라인(13)의 분기 접속지점에는 오일공급 및 리턴라인(11)(13)을 선택적으로 개폐하기 위한 삼방향 솔레노이드 밸브(19)가 설치되어 있으며 삼방향 솔레노이드 밸브(19)는 전자제어장치(20)의 제어에 의해 작동이 제어된다.At the branch connection point of the oil supply line 11 and the oil return line 13, a three-way solenoid valve 19 for selectively opening and closing the oil supply and return lines 11 and 13 is installed and a three-way solenoid The valve 19 is controlled to be operated by the control of the electronic controller 20.
한편 상기 유압기구(5)의 반대측인 로커암(2)의 상부로 로커축 지지캠(21)이 설치되어 있다.On the other hand, the rocker shaft support cam 21 is provided above the rocker arm 2 opposite to the hydraulic mechanism 5.
이와같은 본 발명에 의한 밸브 리프트량의 가변작동 과정은 다음과 같다.Such a variable operation process of the valve lift amount according to the present invention is as follows.
차속센서(22)나 엔진 rpm센서(23) 및 TPS센서(24)로부터 저속 저부하 운전조건임이 검출되면 전자제어장치(20)는 삼방향 솔레노이드 밸브(19)에 전원을 인가하여 오일리턴라인(13)은 차단하고 오일공급라인(11)은 개방토록 작동한다.When it is detected that the vehicle is at low speed and low load operation condition from the vehicle speed sensor 22, the engine rpm sensor 23, and the TPS sensor 24, the electronic controller 20 supplies power to the three-way solenoid valve 19 to provide an oil return line ( 13) shut off and the oil supply line 11 operates to open.
이에따라 메인갤러리(12)에서 오일이 오일통로(10)를 통하여 저압실(9)내에 공급되어 저압플런저(6)가 로커축(3)을 상부로 밀어올리게 되며 이때 상부측을 받치고 있는 로커축지지캠(21)은 회전되어 노스부가 밀려나므로써 자리를 잡아주게 된다.Accordingly, oil is supplied from the main gallery 12 into the low pressure chamber 9 through the oil passage 10 so that the low pressure plunger 6 pushes the rocker shaft 3 upwards, and at this time, the rocker shaft support supporting the upper side. The cam 21 is rotated so that the north part is pushed out to position it.
이와같이하여 로커축(3)이 상승하여 로커암(2)의 기울기가 커지게되면 밸브(1)를 작동하는 조정나사(25)측이 상승하게 되며 캠(4)이 회전하여 로커암(2)이 로커축(3)을 중심하여 시이소오 회동 작동하면 밸브(1)가 열리게 되는 데 밸브(1)의 리프트량(즉 열림량)이 감소되어지게 되므로 연소실에 도입되는 혼합기량도 적어지게 된다.In this way, when the rocker shaft 3 rises and the inclination of the rocker arm 2 increases, the adjustment screw 25 side for operating the valve 1 rises, and the cam 4 rotates so that the rocker arm 2 When the seesaw rotational operation is performed around the rocker shaft 3, the valve 1 is opened and the lift amount (ie, the opening amount) of the valve 1 is reduced, so that the amount of the mixer introduced into the combustion chamber is also reduced.
만일 차속센서(22)나 엔진 rpm센서(23) 및 TPS센서(24)로부터 고속 고부하 운전 조건임이 검출되었다면 전자제어장치(20)는 삼방향 솔레노이드 밸브(19)에의 전원공급을 차단하므로써 오일공급라인(11)은 차단하고 오일리턴라인(13)을 개방하게 된다.If it is detected that the high speed and high load operating conditions are detected from the vehicle speed sensor 22, the engine rpm sensor 23, and the TPS sensor 24, the electronic controller 20 cuts off the power supply to the three-way solenoid valve 19 to supply oil. 11 shuts off and opens the oil return line 13.
이에따라 유압기구(5)의 저압실(9)내에 공급되었던 오일이 오일리턴라인(13)을 통해 빠져나가게 되므로 저압플런저(6)는 하강하게 되며 저압플런저(6)에 계합된 로커축(3)도 하강되어 경사각이 작아지고 그 하강된 간격은 로커축지지캠(21)이 회전하여 그의 노스부가 로커아암(2)을 눌러주어 보상하게 된다.Accordingly, since the oil supplied into the low pressure chamber 9 of the hydraulic mechanism 5 is discharged through the oil return line 13, the low pressure plunger 6 is lowered and the rocker shaft 3 engaged with the low pressure plunger 6. The lowered inclination angle becomes smaller and the lowered interval is compensated by the rocker shaft support cam 21 being rotated so that the north part presses the rocker arm 2.
따라서 캠(4)이 작동하였을 때 밸브(1)의 리프트량이 커져 밸브가 많이 열려지게 되어 많은 량의 혼합기가 도입되어지게 되며 배기도 신속하게 이루어지게 되는 것이다.Therefore, when the cam 4 is operated, the lift amount of the valve 1 is increased so that the valve is opened a lot, a large amount of the mixer is introduced, and the exhaust is made quickly.
이상과 같은 본 발명에 의하면 엔진의 저속 저부하 운전시에는 밸브의 리프량이 작아지고 고속 고부하 운전시에는 밸브의 리프트량이 커지게 되므로써 엔진의 성능 및 연비를 향상하게 되는 효과가 있다.According to the present invention as described above, the leaf amount of the valve is reduced at low speed and low load operation of the engine, and the lift amount of the valve is increased at high speed and high load operation, thereby improving the performance and fuel efficiency of the engine.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960066729A KR100248335B1 (en) | 1996-12-17 | 1996-12-17 | Valve train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960066729A KR100248335B1 (en) | 1996-12-17 | 1996-12-17 | Valve train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980048177A KR19980048177A (en) | 1998-09-15 |
| KR100248335B1 true KR100248335B1 (en) | 2000-04-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960066729A KR100248335B1 (en) | 1996-12-17 | 1996-12-17 | Valve train |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100248335B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100343996B1 (en) * | 1999-12-31 | 2002-07-20 | 현대자동차주식회사 | Hydraulic valve lifter |
| KR20040045245A (en) * | 2002-11-25 | 2004-06-01 | 현대자동차주식회사 | Continuously Variable Valve Timing system having the booster pump |
-
1996
- 1996-12-17 KR KR1019960066729A patent/KR100248335B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980048177A (en) | 1998-09-15 |
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