KR100253431B1 - A device with idle valve on 4-valve type engine - Google Patents
A device with idle valve on 4-valve type engine Download PDFInfo
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- KR100253431B1 KR100253431B1 KR1019960073057A KR19960073057A KR100253431B1 KR 100253431 B1 KR100253431 B1 KR 100253431B1 KR 1019960073057 A KR1019960073057 A KR 1019960073057A KR 19960073057 A KR19960073057 A KR 19960073057A KR 100253431 B1 KR100253431 B1 KR 100253431B1
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- oil
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- hydraulic chamber
- return line
- engine
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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
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
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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
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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
- F01L3/10—Connecting springs to valve members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
본 발명은 4-밸브타입의 엔진에서 엔진의 운전조건에 맞추어 흡기 효율을 향상시킨 일측 밸브휴지(休止) 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a one-side valve stop device that improves intake efficiency in accordance with engine operating conditions in a four-valve type engine.
최근 고출력 및 고회전용 엔진으로 1실린더 4-밸브타입이 일반화되고 있다.Recently, a one-cylinder four-valve type has become commonplace for high power and high power engines.
상기한 4-밸브타입은 흡기포트가 2개이어서 일시에 많은량의 혼합기의 도입이 가능하여 고출력 고속운전에 유리하다. 그러나 종래의 4-밸브타입 엔진의 경우 2개의 흡기밸브가 로커암에 연동하여 캠 작동면을 따라 동시에 작동하게 되므로써 엔진의 저속 및 중속 영역에서는 흡기 유속이 저하되어 오히려 엔진 성능을 저하시키는 부작용이 있게 된다.Since the four-valve type has two intake ports, it is possible to introduce a large amount of mixer at a time, which is advantageous for high output and high speed operation. However, in the case of the conventional four-valve type engine, since two intake valves are simultaneously operated along the cam operating surface in conjunction with the rocker arm, the intake flow rate is lowered in the low and medium speed regions of the engine, which may have the side effect of degrading the engine performance. do.
이에 본 발명은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 바는 엔진의 고속운전 영역에서는 2개의 흡기밸브가 모두 열려지도록 하며 엔진의 저속 및 중속 영역에서는 2개의 흡기밸브중 하나는 작동되지 않도록 함으로써 흡기 효율을 최적화한 4-밸브타입 엔진의 일측 밸브휴지 장치를 제공하는 데 있다.Therefore, the present invention has been proposed in view of the above problems, and its purpose is to allow both intake valves to be opened in the high speed region of the engine, and one of the two intake valves is not operated in the low and medium speed regions of the engine. It is to provide a valve restraining device on one side of the four-valve type engine by optimizing the intake efficiency.
상기한 목적을 달성하기 위하여 본 발명은 밸브와 밸브를 작동하기 위한 로커암과 로커암을 작동하는 캠을 포함하여 구성되는 밸브트레인에 있어서, 상기 캠과의 접촉부인 로커암 단부에 형성되는 유압실과; 일단은 상기 유압실에 수용되고 타단은 상기 캠에 접촉하며 상기 유압실에 작용하는 유압이 상실될 때 유압실을 따라 이동이 허용되는 작동봉과; 상기 작동봉이 항상 캠표면에 밀착하도록 힘을 가하는 리턴스프링과; 오일갤러리로부터 로커암축을 통하여 상기 유압실에 연통하는 오일통로와; 상기 오일통로에 접속되어 오일을 저압측으로 리턴시키는 오일리턴라인과; 상기 오일리턴라인과 오일통로의 접속지점에 오일갤러리측과 오일리턴라인측을 선택적으로 개폐하도록 절환되는 솔레노이드밸브와; 엔진의 고속 운전시에는 상기 솔레노이드밸브가 오일리턴라인을 차단하고 오일통로와 오일갤러리를 연통시키도록 작동 제어하며 엔진의 저·중속 운전시에는 상기 오일통로와 오일리턴라인을 연통시키고 상기 오일갤러리측은 차단하도록 작동제어하는 전자제어장치와; 를 포함하여 구성되는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a valve train comprising a rocker arm for operating the valve and the valve and a cam for operating the rocker arm, the hydraulic chamber being formed at the end of the rocker arm that is in contact with the cam; ; An operating rod one end of which is received in the hydraulic chamber and the other end of which contacts the cam and is allowed to move along the hydraulic chamber when the hydraulic pressure acting on the hydraulic chamber is lost; A return spring for applying a force such that the operating rod is always in close contact with the cam surface; An oil passage communicating with the hydraulic chamber from the oil gallery through the rocker arm shaft; An oil return line connected to the oil passage to return oil to the low pressure side; A solenoid valve switched to selectively open and close an oil gallery side and an oil return line side at a connection point between the oil return line and the oil passage; When the engine operates at high speed, the solenoid valve blocks the oil return line and controls the oil passage to communicate with the oil gallery. During low and medium speed operation of the engine, the oil passage and the oil return line communicate with each other. An electronic control device for controlling operation to shut off; Characterized in that comprises a.
제1도는 본 발명에 의한 4-밸브타입 엔진의 일측 밸브휴지 장치를 나타내는 도면.1 is a view showing a valve holding device of one side of a four-valve type engine according to the present invention.
제2도는 동상 장치의 오일공급 회로도.2 is an oil supply circuit diagram of the in-phase device.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 흡기밸브 2 : 로커축1: Intake valve 2: Rocker shaft
3 : 로커암 4 : 캠3: rocker arm 4: cam
5 : 작동봉 6 : 유압실5: operating rod 6: hydraulic chamber
7 : 스토퍼링 8 : 시일부재7: stopper ring 8: seal member
9 : 리턴스프링 10 : 밸브스프링9: return spring 10: valve spring
11 : 오일갤러리 12 : 오일통로11: oil gallery 12: oil passage
13 : 오일리턴라인 14 : 솔레노이드밸브13 oil return line 14 solenoid valve
15 : 차속센서 16 : 전자제어장치15: vehicle speed sensor 16: electronic control device
20 : 노스부20: North part
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.
제1도는 본 발명에 의한 4-밸브타입 엔진에서의 밸브휴지 장치를 나타내는 도면이며 제2도는 본 발명의 유압회로를 나타내는 도면이다.1 is a view showing a valve stop device in a four-valve type engine according to the present invention, and FIG. 2 is a view showing a hydraulic circuit of the present invention.
도면중 부호 1은 밸브이며 밸브(1)는 로커축(2)을 중심으로 회동작동하는 로커암(3)에 의해 작동한다.In the figure, reference numeral 1 denotes a valve, and the valve 1 is operated by a rocker arm 3 which rotates about the rocker shaft 2.
부호 4는 캠이며 캠(4)은 직접 로커암(3)에 접촉하지 아니하고 작동봉(5)을 개재하여 접촉한다.Reference numeral 4 is a cam and the cam 4 is not in direct contact with the rocker arm 3 but in contact with the operating rod 5.
이를 위해 상기 로커암(3)에는 공간부인 유압실(6)이 형성되고 상기 작동봉(5)의 일단은 상기 유압실(6)내에 수용되고 그의 타단은 상기 캠(4) 표면에 접촉한다.To this end, the rocker arm 3 is provided with a hydraulic chamber 6 which is a space part, one end of the operating rod 5 is accommodated in the hydraulic chamber 6 and the other end thereof contacts the surface of the cam 4.
상기 작동봉(5)은 유압실(6)내로 미끄러져 이동할 수 있으며 유압실(6)로부터 이탈되지 않도록 스토퍼링(7)이 구비되어 있으며 또한 틈새를 통한 오일의 누설을 방지하기 위해 시일부재(8)가 마련되어 있다.The operating rod 5 is slid and moved into the hydraulic chamber 6 and is provided with a stopper ring 7 so as not to be separated from the hydraulic chamber 6, and also to prevent the leakage of oil through the gap seal member ( 8) is provided.
그리고 상기 유압실(6)내에는 상기 작동봉(5)이 캠(4)에 밀착하도록 탄발력을 가하는 리턴스프링(9)이 수용되어 있으며 상기 스프링(9)의 탄발력은 밸브(1)를 복귀하기 위한 밸브스프링(10)의 탄발력보다는 훨씬 작다.In the hydraulic chamber 6, a return spring 9 for applying elasticity to the operating rod 5 to be in close contact with the cam 4 is accommodated, and the elasticity of the spring 9 is applied to the valve 1. It is much smaller than the resilience of the valve spring 10 to return.
상기 유압실(6)은 오일갤러리(11)와 오일통로(12)를 통하여 연통되어지며 상기 오일통로(12)는 로커축(2)에의 윤활을 위한 오일공급로로서 로커축(2)과 로커암(3) 몸체를 통하여 형성된다.The hydraulic chamber 6 is communicated through the oil gallery 11 and the oil passage 12 and the oil passage 12 is an oil supply passage for lubrication of the rocker shaft 2 and the rocker shaft 2 and the rocker. It is formed through the arm 3 body.
그리고 상기 오일통로(12)는 오일리턴라인(13)이 분기접속되어 있고 그 분기 접속지점에는 유로의 방향 절환을 위한 솔레노이드밸브(14)가 설치된다.In the oil passage 12, the oil return line 13 is branch-connected, and a solenoid valve 14 for changing the direction of the flow path is installed at the branch connection point.
상기한 솔레노이드밸브(14)는 엔진의 운전조건에 따라 상기 오일갤러리(11)와 오일통로(12)를 연통하고 오일리턴라인(13)은 차단하거나 또는 오일리턴라인(13)과 오일통로(12)를 연통시키고 오일갤러리(11)는 차단하는 작용을 한다.The solenoid valve 14 communicates with the oil gallery 11 and the oil passage 12 and blocks the oil return line 13 or blocks the oil return line 13 and the oil passage 12 according to the engine operating conditions. ) To communicate and the oil gallery (11) acts to block.
이와 같은 본 발명에 의한 작동과정은 다음과 같다.Such an operation process according to the present invention is as follows.
속도센서(15)를 통하여 엔진이 저속 및 중속운전 중임이 검출되면 전자제어장치(16)는 오일갤러리(11)를 차단하고 오일리턴라인(13)은 개방하도록 솔레노이드 밸브(14)를 구동제어한다.When the engine detects that the engine is running at low speed and medium speed through the speed sensor 15, the electronic controller 16 controls the solenoid valve 14 to shut off the oil gallery 11 and open the oil return line 13. .
이때 캠(4)의 노스부(17)가 회전하여 작동봉(5)을 밀어올리게 되면 유압실(6)은 압축력을 받게되며 오일통로(12)가 저압측인 오일리턴라인(13)에 연통하고 있어 유압실(6)내의 오일이 오일리턴라인(13)을 통하여 빠져나가게 된다.At this time, when the north part 17 of the cam 4 is rotated to push up the operating rod 5, the hydraulic chamber 6 receives a compressive force and the oil passage 12 communicates with the oil return line 13 having the low pressure side. The oil in the hydraulic chamber 6 flows out through the oil return line 13.
따라서 작동봉(5)은 유압실(6)을 통하여 로커암(3)을 회동시키지 못하고 유압이 빠져나가는 유압실(6)내의 빈공간 속으로 미끄러져 들어가게 되므로 밸브(1)는 작동되지 않게 되며 다른 흡기밸브만 열려지게 된다.Therefore, since the operating rod 5 does not rotate the rocker arm 3 through the hydraulic chamber 6 and slides into the empty space in the hydraulic chamber 6 through which the hydraulic pressure is released, the valve 1 is not operated. Only the other intake valves will open.
한편 작동봉(5)이 유압실(6)의 빈 공간으로 들어갈 때 리턴스프링(9)이 탄발 지지하게 되므로 리턴스프링(9)을 경유하여 로커암(3)이 회동하려고 하나 리턴스프링(9)보다 밸브스프링(10)이 탄성력이 훨씬 크므로 로커암(3)은 회동하지 않게 되는 것이다.On the other hand, when the operating rod 5 enters the empty space of the hydraulic chamber 6, the return spring 9 is elastically supported so that the rocker arm 3 tries to rotate via the return spring 9, but the return spring 9 Since the valve spring 10 has a much larger elastic force, the rocker arm 3 does not rotate.
그러나 운전조건이 고속으로 전환되면 속도센서(15)로부터 운전 정보를 읽어들인 전자제어장치(16)가 이번에는 오일리턴라인(13)을 차단하고 오일통로(12)는 오일갤러리(11)와 연통하도록 솔레노이드밸브(14)가 절환 작동되도록 제어한다.However, when the driving condition is switched to high speed, the electronic controller 16 which reads operation information from the speed sensor 15 cuts off the oil return line 13 and the oil passage 12 communicates with the oil gallery 11. The solenoid valve 14 is controlled to be switched.
이에따라 오일통로(12)를 통해 유압실(6)에 오일갤러리(12)측의 고압의 유압이 작용하게 되며 캠(5)이 회전하여 노스부(17)가 작동봉(5)을 밀어올리게 되면 작동봉(5)이 강한 유압과 리턴스프링(9)의 탄발력으로 지지되어 로커암(3) 몸체와 일종의 강체를 형성하게 되어 로커암(3)은 로커축(2)을 중심으로 회동작동하므로써 밸브(1)를 내리눌러 개방시키게 된다.Accordingly, the high pressure hydraulic pressure of the oil gallery 12 side acts on the hydraulic chamber 6 through the oil passage 12, and when the cam 5 rotates, the north part 17 pushes up the operating rod 5. The operating rod 5 is supported by the strong hydraulic pressure and the elasticity of the return spring 9 to form a kind of rigid body with the rocker arm 3 body so that the rocker arm 3 rotates about the rocker shaft 2. The valve 1 is pressed down to open.
여기서 미설명 부호 18은 실린더헤드이다.Reference numeral 18 here is a cylinder head.
이와 같이 본 발명은 저속시에는 2개의 흡기밸브중 1개는 흡기포트를 개방하도록 작동되고 나머지 한 개는 작동되지 않게되며 엔진의 고속 운전시에는 2개의 흡기밸브 모두가 리프트 작동되어지게 된다.As such, the present invention operates one of the two intake valves to open the intake port at a low speed, and the other one is not operated, and both of the intake valves are lifted at the high speed of the engine.
이상과 같은 본 발명은 유압에 의해 지지되는 작동봉을 개재시켜 캠의 회전력을 로커암에 전달토록 하는 것에 의해서 엔진의 저·중속에서는 작동봉을 지지하는 유압을 제거하여 캠의 회전이 작동봉만을 움직일 뿐 로커암을 회동시키지는 못하도록 하여 1개의 흡기밸브 작동을 중지시키므로써 개방된 하나의 흡기포트를 통해 흡기유속이 증대되어 지게되며 엔진의 고속 운전시에는 작동봉에 유압이 작용하여 캠의 회전운동을 로커암에 전달하여 2개의 밸브 모두가 작동되므로 충분한량의 혼합기가 도입되어 엔진의 전운전 영역에 걸쳐 출력 및 연비를 향상하고 배기가스 발생이 저감되는 효과가 있다.The present invention as described above is to transmit the rotational force of the cam to the rocker arm via the operating rod supported by the hydraulic pressure to remove the hydraulic pressure supporting the operating rod at low and medium speed of the engine to rotate the cam only the operating rod The intake flow rate is increased through one open intake port by stopping the operation of one intake valve by preventing the rocker arm from rotating only.In the high speed operation of the engine, hydraulic pressure acts on the operating rod to rotate the cam. Since the two valves are operated by transferring the rocker arm, a sufficient amount of the mixer is introduced to improve the output and fuel efficiency and reduce the emission of exhaust gas over the entire operating region of the engine.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960073057A KR100253431B1 (en) | 1996-12-27 | 1996-12-27 | A device with idle valve on 4-valve type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960073057A KR100253431B1 (en) | 1996-12-27 | 1996-12-27 | A device with idle valve on 4-valve type engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980053928A KR19980053928A (en) | 1998-09-25 |
| KR100253431B1 true KR100253431B1 (en) | 2000-04-15 |
Family
ID=19491233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960073057A KR100253431B1 (en) | 1996-12-27 | 1996-12-27 | A device with idle valve on 4-valve type engine |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100253431B1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0350303A (en) * | 1989-07-17 | 1991-03-04 | Nissan Motor Co Ltd | Locker arm |
-
1996
- 1996-12-27 KR KR1019960073057A patent/KR100253431B1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0350303A (en) * | 1989-07-17 | 1991-03-04 | Nissan Motor Co Ltd | Locker arm |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980053928A (en) | 1998-09-25 |
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