KR100245503B1 - Stroke variable device of internal combustion valve - Google Patents

Stroke variable device of internal combustion valve Download PDF

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Publication number
KR100245503B1
KR100245503B1 KR1019950041345A KR19950041345A KR100245503B1 KR 100245503 B1 KR100245503 B1 KR 100245503B1 KR 1019950041345 A KR1019950041345 A KR 1019950041345A KR 19950041345 A KR19950041345 A KR 19950041345A KR 100245503 B1 KR100245503 B1 KR 100245503B1
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South Korea
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valve
stroke
internal combustion
variable device
variable
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KR1019950041345A
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Korean (ko)
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KR970027656A (en
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윤영훈
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류정열
기아자동차주식회사
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Publication of KR970027656A publication Critical patent/KR970027656A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015Modifications 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46Component parts, details, or accessories, not provided for in preceding subgroups

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

본 발명의 목적은 자동차 내연기관 흡입기밸브의 행정 가변장치를 제공함에 의해 달성되는데, 이 가변장치는 밸브 스템앤드와 캠의 사이에 차속에 따른 제어수단에 의해 구동하는 유압회로와 연동되는 가변수단을 개재하여 차속에 비레하여 밸브의 행정거리를 가변시키게 하고 있다. 따라서 차속에 비례하여 밸브의 행정을 가변시키어 연비는 물론, 성능향상시키게 된다.The object of the present invention is achieved by providing a stroke variable device of an intake valve of an automobile internal combustion engine, which variable variable device is interlocked with a hydraulic circuit driven by a control means according to the vehicle speed between the valve stem and the cam. The stroke distance of the valve is varied depending on the vehicle speed. Therefore, the stroke of the valve is changed in proportion to the vehicle speed, thereby improving fuel economy and performance.

Description

내연기관 밸브의 행정 가변장치Stroke variable device of internal combustion engine valve

제1도는 일반적인 내연기관의 급배기구성을 보인 단면도.1 is a cross-sectional view showing the supply and exhaust ventilation of the general internal combustion engine.

제2도는 본 발명 내연기관 밸브의 행정 가변장치의 구성을 개략적으로 보인 설명도.Figure 2 is an explanatory view schematically showing the configuration of the stroke variable device of the internal combustion engine valve of the present invention.

제3도는 본 발명 내연기관 밸브의 행정 가변장치에 적용되는 가변수단의 유압회로도.Figure 3 is a hydraulic circuit diagram of the variable means applied to the stroke variable device of the internal combustion engine valve of the present invention.

제4a, b도는 본 발명 가변수단의 조작상태를 보인 개략도로서,4A and 4B are schematic views showing an operating state of the variable means of the present invention;

a도는 가변수단이 조정되지 않은 상태로 보인 설명도.a is an explanatory view in which the variable means is not adjusted.

b도는 가변수단이 조정된 상태를 보인 설명도.b is an explanatory diagram showing a state in which the variable means are adjusted.

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

200 : 밸브 300 : 캠클립200: valve 300: cam clip

500 : 가변수단 510 : 고정자500: variable means 510: stator

520 : 가동자 600 : 유압회로520: mover 600: hydraulic circuit

610, 620 : 유압실린더 630 : 피스톤축610, 620: hydraulic cylinder 630: piston shaft

본 발명은 내연기관의 행정사이클, 즉 흡입, 압축, 팽창, 배기과정에서 연소공기의 흡기와 연소가스 배기과정을 수행시키는 급배기밸브에 관한 것으로, 특히 흡배기밸브의 행정을 차속에 비례하여 가변시키어 연비향상과 성능을 높일 수 있는 내연기관의 급배기밸브의 행정 가변장치에 관한 것이다.The present invention relates to an air supply and exhaust valve for performing the intake and combustion gas exhaust process of the combustion air during the stroke cycle, that is, the intake, compression, expansion, exhaust of the internal combustion engine, in particular by varying the stroke of the intake exhaust valve in proportion to the vehicle speed The present invention relates to a stroke variable device of an exhaust valve of an internal combustion engine that can improve fuel efficiency and improve performance.

내연기관의 급배기밸브는 사이드밸브식과 오버헤드밸브식과 오버헤드 캠축식, 그리고 캠축구동방식등을 들을 수 있는데, 이러한 밸브들은 대략 푸시로드의 설정된 행정 또는 캠의 회동반경에 의해 일정한 행정을 가지고 연소공기 흡기와 연소가스의 배기를 이루게 하고 있는데, 이러한 밸브들 중에서 주로 많이 사용되고 있는 밸브를 들어 설명하여 보면 제1도에는 캠축구동방식의 예를 보이고 있다. 캠축구동방식은 압축스프링(10)에 의해 탄력설치된 밸브(20)의 상단부에 캠(30)을 설치하여 그 캠(30)의 회전반경에 의해 밸브(20)의 연소공기 흡기와 연소가스 배기를 위한 개폐동작을 수행하게 된다.The supply / exhaust valve of the internal combustion engine includes side valve type, overhead valve type, overhead camshaft type, and camshaft driving type. These valves have a constant stroke due to the set stroke of the push rod or the turning radius of the cam. Combustion air intake and exhaust gas are exhausted. Among the valves, many of these valves are mainly used to illustrate the example of the cam shaft driving method. In the cam shaft driving method, the cam 30 is installed at the upper end of the valve 20 elastically installed by the compression spring 10, and the combustion air intake and exhaust gas exhaust of the valve 20 are caused by the rotation radius of the cam 30. To perform the opening and closing operation for.

이러한 연소공기 흡배기를 위해 설치되는 밸브(20)는 상기에서와 같이 일정한 회전반경을 가지고 구동하는 캠(30)에 의해 설정된 행정을 가지고 연소실(40)의 흡배기구(41)를 개폐하게 된다. 이때 흡배기밸브는 피스톤이 1사이클하는 극히 짧은 시간에 용이하게 흡기, 배기 하여 체적효휼을 높이고 있는데, 이러한 흡배기용 밸브(20)는 차속의 고,중,저속및 공회전시의 평균값을 가지고 밸브(20)의 행정거리를 설정하여 목적하는 흡배기를 이루게 하고 있는 것으로, 불필요한연료소비가 발생하고 연비를 떨어뜨리는 문제점이 있었을 뿐 아니라, 고속시 성능이 저하되는 결함이 있었다.The valve 20 installed for the combustion air intake and exhaust opens and closes the intake and exhaust ports 41 of the combustion chamber 40 with the stroke set by the cam 30 driving with a constant rotation radius as described above. At this time, the intake and exhaust valve is easily intake and exhaust in a very short time of one cycle of the piston to increase the volumetric hydration, the intake and exhaust valve 20 is a valve (20) has an average value at high, medium, low speed and idle speed of the vehicle speed In order to achieve the desired intake and exhaust air by setting the stroke distance, the fuel consumption is not only generated and fuel consumption is deteriorated.

본 발명은 상기와 같은 사정을 고려하여 이루어진 것으로, 그 목적은 벨브의 행정을 가변시키어 연비와 성능을 향상시킬 수 있는 내연기관 밸브의 행정가변장치를 제공하는 것이다.The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a stroke variable device for an internal combustion engine valve which can improve the fuel efficiency and performance by varying the stroke of the valve.

이러한 본 발명의 목적은 자동차 내연기관 흡배기밸브의 행정 가변장치를 제공함에 의해 달성되게 되는데, 이 가변장치는 밸브 스템앤드와 캠의 사이에 차속에 따른 제어수단에 의해 구동하는 유압회로와 연동되는 가변수단을개재하여 차속에 비례하여 밸브의 행정거리를 가변시키게 하고 있다. 따라서 차속에 비례하여 밸브의 행정을 가변시키어 연비를 물론, 성능향상시키게 된다.This object of the present invention is achieved by providing a stroke variable device of an automobile intake and exhaust valve of a vehicle, which variable variable with the hydraulic circuit driven by the control means according to the vehicle speed between the valve stem and the cam. By means of means, the stroke length of the valve is varied in proportion to the vehicle speed. Therefore, the stroke of the valve is changed in proportion to the vehicle speed, thereby improving fuel economy and performance.

다음 본 발명의 실시예를 도면에 의거하여 구체적으로 설명하겠다. 제2도에는 본 발명에 따른 밸브의 행정가변장치가 개재된 상태를 개략적으로 보이고 있다. 본 발명은 밸브(200)의 밸브스템앤드와 캠(300)의 사이에 가변수단(500)을 개재시키게 될 것이다.Next, embodiments of the present invention will be described in detail with reference to the drawings. Figure 2 schematically shows a state in which the stroke variable device of the valve according to the present invention is interposed. In the present invention, the variable means 500 may be interposed between the valve stem and the cam 300 of the valve 200.

가변수단(500)는 밸브스템앤드에 일체로 구성되는 고정자(510)과 이후에설명할 유압회로에 의해 구동하는 가동자(520)로 구성되어 있다. 이렇게 구성되는 고정자(510)와 가동자(520)는 상호 맞접되는 대향면에 소정의 각도를 가지는 경사면(511)과 (512)을 각각 가지고 있다.The variable means 500 is composed of a stator 510 integrally formed with the valve stem end and a mover 520 driven by a hydraulic circuit to be described later. The stator 510 and the mover 520 configured as described above have inclined surfaces 511 and 512 having predetermined angles on opposite surfaces that are in contact with each other.

또 이렇게 구성되는 가변수단(500)은 별도의 유압회로에 의해 구동하게 된다. 제3도에는 가변수단(500)의 구동을 위한 유압회로(600)가 도시되어 있다, 즉 이러한 유압회로(600)는 도면에서와 같이 양측에 유압실린더(610)과 (620)을 구비하고 이들의 유압실린더(610)과(620) 각각에 공급유로와 회수유로를 연결하여 왕복동이 가능하게 함과 아울러, 양 유압실린더(610)과 (620)의 사이에 피스톤축(630)을 설치하여 유압의 공급방향에 따라 피스톤축(630)이 소정의 행정을 가지고 왕복동된다.In addition, the variable means 500 configured as described above is driven by a separate hydraulic circuit. 3 shows a hydraulic circuit 600 for driving the variable means 500. That is, the hydraulic circuit 600 has hydraulic cylinders 610 and 620 on both sides as shown in the drawing. It is possible to reciprocate by connecting the supply flow path and the recovery flow path to each of the hydraulic cylinders 610 and 620, and install a piston shaft 630 between both hydraulic cylinders 610 and 620 to provide hydraulic pressure. According to the supply direction of the piston shaft 630 is reciprocated with a predetermined stroke.

그리고 이렇게 구성되는 유압회로(600)의 피스톤축(630)상에 가변수단(500)의 가동자(520)를 등간격으로 설치하여 피스톤축(630)의 구동거리에 의해 가동자(520)을 소정의 거리이내에서 구동시키게 된다.Then, the actuator 520 of the variable means 500 is installed at equal intervals on the piston shaft 630 of the hydraulic circuit 600 configured as described above to move the actuator 520 by the driving distance of the piston shaft 630. Drive within a predetermined distance.

또 이러한 가변수단(500)은 캠(300)의 구동에 따라 승강동작을 이루어야 하는데, 본 발명에서는 제2도에서 도시된 바와 같이 유압실린더(610)과 (620) 각각을 탄성부재(700)에 의해 탄력설치 시키어 목적하는 승강작용을 수행하게 하였다. 이러한 승강구조는 본 발명의 일실시예로서 추후 개발하여 실시할 수 도 있을 것이다.In addition, the variable means 500 should perform the lifting operation according to the driving of the cam 300, in the present invention, as shown in FIG. 2, the hydraulic cylinders 610 and 620 to the elastic member 700, respectively. By the elastic installation by the intended lifting effect. This lifting structure may be further developed and carried out as an embodiment of the present invention.

또한 제4도에는 가변수단(500)의 조정과정이 도시되어 있는데, 제4a도의 경우는 가변수단(500)이 조정되기 이전의 모습이다. 이와 같은 상태에서 E,C,U 에서 신호가 주어지면 유압모터가 구동하여 유압회로(600)를 구동시키고 이렇게 유압회로(600)가 구동하여 가동자(520)가 좌향으로 밀려나아가면, 이때 가동자(520)는 고정자(510)의 경사면(511)을 타고 미끄러져 고정자(510)의 경사면(511) 좌측에 위치한다. 이렇게 이동된 가동자(520)는 그 경사면(521)의 고에 의해 고정자(510)를 내림높이(h)로 하가시킨다. 이렇게 하여 밸브의 행정을 가변시키게될 것이다. 그리고 이러한 가변수단(500)은 그 고정자(510)과 가동자(520) 각각의 경사면(511)과 (521) 의 각도에 따라 그 내림높이(h)가 조절될 것이다.In addition, the adjusting process of the variable means 500 is shown in FIG. 4, which is the case before the variable means 500 is adjusted. In this state, when a signal is given from E, C, and U, the hydraulic motor is driven to drive the hydraulic circuit 600. Thus, the hydraulic circuit 600 is driven so that the mover 520 is pushed to the left. The ruler 520 slides on the inclined surface 511 of the stator 510 and is positioned on the left side of the inclined surface 511 of the stator 510. The mover 520 moved in this way lowers the stator 510 to the lowered height h by the height of the inclined surface 521. This will change the stroke of the valve. And the declining means (500) will be adjusted according to the angle of the inclined surface 511 and 521 of the stator 510 and the mover 520, the lowering height (h).

그러면 본 발명의 행정 가변장치 효과에 관해 상세히 설명하겠다. 본 발명은 자동차 운행속도, 즉 차속의 고,중,저속에 따라서 밸브의 흡배기밸브 행정거리가 비례하여 가감되게하고 있다. 예를 들어 저속및 공회전시에는 가변수단(500)이 제4a도와 같은 상태에서 행정을 이루게 하고 고속시에서는 제4b도에서와 같이 가변수단(500)이 조절되어 밸브의 행정거리를 크게 가지어 성능을 향상시키게 된다. 따라서 연비를 향상시키고 출력증대는 물론 연료소비를 절감시키는 경제적인 이점이 있다.This will be described in detail with respect to the stroke variable effect of the present invention. According to the present invention, the stroke length of the intake / exhaust valve of the valve is proportionally added or decreased according to the vehicle running speed, that is, the high, medium, and low speed of the vehicle speed. For example, at low speed and idling, the variable means 500 achieves a stroke in the state shown in FIG. 4a, and at high speed, the variable means 500 is adjusted as in FIG. Will improve. Therefore, there is an economical advantage to improve fuel economy, increase output and reduce fuel consumption.

Claims (1)

캠과 밸브의 스템엔드 사이에 밸브의 행정거리를 조절시키는 가변수단이 구비되어 있는 내연기관 밸브의 행정가변장치에 있어서, 상기 가변수단은 밸브의 스템엔드에 고정되는 고정자와 유압실린더의 피스톤축에 고정되는 가동자로 구성되고, 이 가동자와 상기 고정자의 접촉하는 대향면에는 상호 대응되는 경사면이 형성된 것을 특징으로 하는 내연기관 밸브의 행정가변장치.In the stroke variable device of an internal combustion engine valve having a variable means for adjusting the stroke distance of the valve between the cam and the stem end of the valve, the variable means is fixed to the piston shaft of the stator and the hydraulic cylinder fixed to the stem end of the valve. And an inclined surface corresponding to each other on an opposing surface of the movable body and the stator in contact with the movable surface of the internal combustion engine valve.
KR1019950041345A 1995-11-14 1995-11-14 Stroke variable device of internal combustion valve KR100245503B1 (en)

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KR1019950041345A KR100245503B1 (en) 1995-11-14 1995-11-14 Stroke variable device of internal combustion valve

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KR100245503B1 true KR100245503B1 (en) 2000-03-02

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04179810A (en) * 1990-11-13 1992-06-26 Tomisaku Niimura Valve switching adjustor for engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04179810A (en) * 1990-11-13 1992-06-26 Tomisaku Niimura Valve switching adjustor for engine

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