KR20090114947A - Continuous variable valve lift apparatus - Google Patents

Continuous variable valve lift apparatus Download PDF

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Publication number
KR20090114947A
KR20090114947A KR1020080040846A KR20080040846A KR20090114947A KR 20090114947 A KR20090114947 A KR 20090114947A KR 1020080040846 A KR1020080040846 A KR 1020080040846A KR 20080040846 A KR20080040846 A KR 20080040846A KR 20090114947 A KR20090114947 A KR 20090114947A
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KR
South Korea
Prior art keywords
cam shaft
cam
valve lift
variable valve
lift apparatus
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Application number
KR1020080040846A
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Korean (ko)
Inventor
신보성
Original Assignee
현대자동차주식회사
기아자동차주식회사
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Application filed by 현대자동차주식회사, 기아자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020080040846A priority Critical patent/KR20090114947A/en
Priority to JP2008290146A priority patent/JP2009270563A/en
Priority to US12/324,549 priority patent/US20090272346A1/en
Priority to CN2008101894449A priority patent/CN101571062B/en
Priority to DE102008063337A priority patent/DE102008063337A1/en
Publication of KR20090114947A publication Critical patent/KR20090114947A/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
    • 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
    • F01L13/0036Modifications 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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0042Modifications 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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
    • 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
    • F01L1/02Valve drive
    • 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
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • 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
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • 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
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08Shape of cams
    • 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
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • 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
    • F01L1/20Adjusting or compensating clearance
    • F01L1/22Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L1/26Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L1/26Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
    • 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
    • F01L2013/0078Modifications 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 by modification of cam contact point by axially displacing the camshaft

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

Abstract

PURPOSE: A continuous variable valve lift apparatus is provided to reduce production cost and repair cost by reducing the number of components through compact structure. CONSTITUTION: A continuous variable valve lift apparatus comprises an input part(100), a cam shaft(200), a controller(300), an inclination cam(210), an intermediate part(400), and a valve opening and closing part(500). The input part is delivered with torque. The cam shaft is delivered with the torque of the input part. The cam shaft is connected in the longitudinal direction to change relative location. The controller adjusts the relative location of the cam shaft. The inclination cam is installed at the cam shaft. The cross section of the inclination cam is inclined in the longitudinal direction of the cam shaft. The intermediate part is reciprocated by being delivered with the rotation of the inclination cam. The valve opening and closing part is opened and closed by the reciprocation of the intermediate part.

Description

연속 가변 밸브 리프트 장치{CONTINUOUS VARIABLE VALVE LIFT APPARATUS} Continuously Variable Valve Lift Device {CONTINUOUS VARIABLE VALVE LIFT APPARATUS}

본 발명은 연속 가변 밸브 리프트에 관한 것으로, 더욱 상세하게는, 밸브의 리프트량을 엔진의 동작상태에 따라 가변 시킬 수 있는 연소 가변 밸브 리프트 장치에 관한 것이다. The present invention relates to a continuous variable valve lift, and more particularly, to a combustion variable valve lift apparatus capable of varying the lift amount of the valve according to the operating state of the engine.

일반적으로 엔진에는 연료가 연소되어 동력을 발생시키는 연소실이 구비되고, 이 연소실에는 연소될 연료가 포함된 혼합가스를 제공하는 흡기밸브와 연소된 가스를 방출하는 배기밸브가 형성되어 있다. 이들 흡기밸브 및 배기밸브는 크랭크 샤프트에 연결된 밸브 개폐기구에 의해 연소실을 개폐한다.In general, an engine is provided with a combustion chamber in which fuel is combusted to generate power, and the combustion chamber is formed with an intake valve for providing a mixed gas containing fuel to be combusted and an exhaust valve for discharging the combusted gas. These intake valves and exhaust valves open and close the combustion chamber by a valve opening and closing mechanism connected to the crankshaft.

통상적인 밸브 개폐기구는 일반적으로 일정한 형상을 갖는 캠에 의해 밸브가 항상 일정한 리프트 양을 가지게 되며, 따라서 흡입 또는 배출되는 가스의 양을 조절할 수 없다. 이에 따라 엔진은 그 운전영역 전반에 걸쳐서 필요로 하는 최적의 상태를 발휘하지 못하게 된다. Conventional valve opening and closing mechanisms generally have a constant lift amount of the valve by means of a cam having a constant shape, and thus cannot control the amount of gas that is sucked or discharged. As a result, the engine does not exhibit the optimal state required throughout its operating range.

즉, 저속의 운전상태에 맞추어 밸브 개폐기구가 설계되면 고속의 운전상태에서는 밸브가 열려있는 시간과 양이 충분하지 못하게 되고, 고속의 운전상태에 맞추 어 설계되면 저속의 운전상태에서 반대의 현상이 일어나게 된다. That is, if the valve opening / closing mechanism is designed in accordance with the low speed operation state, the time and amount of valve opening are not sufficient in the high speed operation state, and if it is designed in accordance with the high speed operation state, the opposite phenomenon occurs in the low speed operation state. Get up.

따라서, 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 창출된 것으로, 작동 영역을 다양하게 구성할 수 있는 연속 가변 밸브 리프트 장치를 제공하는데 있다.Accordingly, the present invention has been made to solve the problems as described above, to provide a continuous variable valve lift device that can be configured in various operating areas.

또한 컴팩트한 구성으로 구성 부품의 수가 적고 부피가 작은 연속 가변 밸브 리프트를 제공하는 것을 목적으로 한다.It also aims to provide a continuous variable valve lift with a small number of components and a small volume in a compact configuration.

이러한 목적을 달성하기 위한 본 발명의 실시예에 따른 연속 가변 밸브 리프트 장치는 회전력을 전달받는 입력부, 상기 입력부의 회전력을 전달받으며 길이방향으로 상대적인 위치가 변동 가능하도록 연결된 캠 샤프트, 상기 캠 샤프트의 상대적인 위치를 조절하도록 구비된 조절부, 상기 캠 샤프트의 길이 방향으로 그 단면이 경사지게 형성되어 상기 캠 샤프트에 구비된 경사 캠, 경사진 형상으로 상기 경사 캠의 회전을 전달받아 왕복 운동하는 매개부 및 상기 매개부의 왕복 운동에 의하여 개폐되는 밸브 개폐부를 포함할 수 있다.Continuous variable valve lift apparatus according to an embodiment of the present invention for achieving this object is a cam shaft connected to receive a rotational force, the rotational force of the input unit is connected so that the relative position is variable in the longitudinal direction, relative to the camshaft Adjusting unit provided to adjust the position, the cross section is formed in the longitudinal direction of the cam shaft is inclined inclined cam provided on the cam shaft, the intermediate unit for receiving the rotation of the inclined cam in the inclined shape reciprocating motion and the It may include a valve opening and closing portion that is opened and closed by the reciprocating motion of the intermediate portion.

상기 입력부는 프론트 저널을 포함하고, 상기 캠 샤프트와 상기 프론트 저널은 회전력을 전달하며 길이 방향으로 상대적인 위치가 변동 가능하도록 연결될 수 있다.The input unit may include a front journal, and the cam shaft and the front journal may be connected to transmit rotational force and to change a relative position in a longitudinal direction.

상기 입력부는 캠 샤프트 스프로켓 및 상기 프론트 저널과 상기 캠 샤프트 사이에서 복원력을 제공하도록 구비된 탄성부를 더 포함할 수 있다.The input unit may further include an elastic unit provided to provide a restoring force between the cam shaft sprocket and the front journal and the cam shaft.

상기 조절부는 상기 캠 샤프트의 상대적인 위치를 조절하도록 상기 캠 샤프트의 길이방향으로 접촉하는 편심 캠을 포함할 수 있다.The control unit may include an eccentric cam in the longitudinal direction of the cam shaft to adjust the relative position of the cam shaft.

상기 매개부는 상기 캠 샤프트와 평행하게 구비된 로커 샤프트 및 상기 로커 샤프트에 왕복운동 가능하게 구비된 로커 레버를 포함할 수 있다.The intermediate unit may include a rocker shaft provided in parallel with the cam shaft and a rocker lever provided reciprocally on the rocker shaft.

상기 로커 레버는 상기 경사 캠과 접촉하는 경사부 및 상기 밸브 개폐부와 접촉하는 출력부를 포함할 수 있다.The rocker lever may include an inclined portion in contact with the inclined cam and an output portion in contact with the valve opening and closing portion.

상기 출력부는 상기 로커 레버가 왕복운동하여 상기 밸브 개폐부의 밸브 리프트가 발생하는 리프트 구간과 상기 밸브 개폐부의 밸브 리프트가 발생하지 않는 제로 리프트 구간을 포함할 수 있다.The output unit may include a lift section in which the rocker lever reciprocates to generate a valve lift of the valve opening and closing portion, and a zero lift section in which the valve lift of the valve opening and closing portion does not occur.

상술한 바와 같이 본 발명의 일 실시예에 따른 연속 가변 밸브 리프트 장치는 구조가 간단하며 부품수가 적어 생산 단가와 정비 비용을 절감할 수 있다.As described above, the continuous variable valve lift apparatus according to the exemplary embodiment of the present invention has a simple structure and a low number of parts, thereby reducing production cost and maintenance cost.

컴팩트한 구성으로 전체 구성 부피가 작은 가변 밸브 리프트 장치를 제공한다.The compact configuration provides a variable valve lift device with a small overall volume.

출력 캠의 간단한 설계변경이나 조절부의 조절 크기에 따라 밸브 리프트 조절이 용이하고, CDA모드의 운전도 가능하다.The valve lift can be easily adjusted according to the simple design change of the output cam or the size of the adjustment part, and the CDA mode can be operated.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세하게 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail as follows.

도1은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 구성을 개략적으로 나타내는 사시도이고, 도2는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 구성을 개략적으로 나타내는 정면도이다.1 is a perspective view schematically showing a configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention, and FIG. 2 is a front view schematically showing a configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention.

도3은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 각 구성을 개략적으로 나타내는 도면이다.3 is a diagram schematically showing each configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention.

도1내지 도3을 참조하면, 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치는 회전력을 전달받는 입력부(100), 상기 입력부(100)의 회전력을 전달받으며 길이방향으로 상대적인 위치가 변동 가능하도록 연결된 캠 샤프트(200), 상기 캠 샤프트(200)의 상대적인 위치를 조절하도록 구비된 조절부(300)를 포함한다.1 to 3, the continuous variable valve lift apparatus according to the embodiment of the present invention receives a rotational force of the input unit 100, the rotational force of the input unit 100 is received so that the relative position in the longitudinal direction can be changed The cam shaft 200 is connected, and the adjusting unit 300 is provided to adjust the relative position of the cam shaft 200.

상기 캠 샤프트(200)에는 상기 캠 샤프트(200)의 길이 방향으로 그 단면이 경사지게 형성된 경사 캠(210)이 구비된다.The cam shaft 200 is provided with an inclined cam 210 inclined in cross section in the longitudinal direction of the cam shaft 200.

상기 경사 캠(210)의 회전은, 경사진 형상으로 상기 경사 캠의 회전을 전달받아 왕복 운동하는 매개부(400)에 전달되고, 다시 상기 매개부(400)의 왕복 운동에 의하여 밸브 개폐부(500)로 전달된다.The rotation of the inclined cam 210 is transmitted to the mediator 400 which receives the rotation of the inclined cam in a sloping shape and reciprocates, and again opens and closes the valve 500 by the reciprocation of the mediator 400. Is delivered.

상기 입력부(100)는 프론트 저널(120)을 포함하고, 상기 캠 샤프트(200)와 상기 프론트 저널(120)은 회전력을 전달하며 길이 방향으로 상대적인 위치가 변동 가능하도록 연결된다. The input unit 100 includes a front journal 120, the cam shaft 200 and the front journal 120 is connected to transmit a rotational force and the relative position in the longitudinal direction is variable.

즉, 도3의 (b)와 (c)에 도시된 바와 같이 프론트 저널 결합부(125)와 캠 샤 프트 결합부(205)가 각각 형성되어 상기 프론트 저널 결합부(125)와 상기 캠 샤프트 결합부(205)가 결합하며, 상기 프론트 저널 결합부(125)와 상기 캠 샤프트 결합부(205)는 회전력을 전달하며 길이 방향으로 상대적인 위치가 변동 가능하도록 연결된다.That is, as shown in (b) and (c) of FIG. 3, the front journal coupling portion 125 and the cam shaft coupling portion 205 are respectively formed so that the front journal coupling portion 125 and the cam shaft coupling are combined. The unit 205 is coupled, and the front journal coupler 125 and the camshaft coupler 205 are connected to transmit a rotational force and to change the relative position in the longitudinal direction.

도면에는 상기 프론트 저널 결합부(125)와 상기 캠 샤프트 결합부(205)가 타원형의 형상으로 표현되어 있으나, 도면의 형상에 한정되는 것은 아니며, 일반적인 스플라인이나 다각형의 형상도 가능하다.Although the front journal coupling portion 125 and the camshaft coupling portion 205 are represented in an elliptical shape in the drawing, the front journal coupling portion 125 and the cam shaft coupling portion 205 are not limited to the shape of the figure, and a general spline or polygonal shape is also possible.

상기 입력부(100)는 캠 샤프트 스프로켓(110) 및 상기 프론트 저널(120)과 상기 캠 샤프트(200) 사이에서 복원력을 제공하는 탄성부(130)를 포함한다.The input unit 100 includes a cam shaft sprocket 110 and an elastic unit 130 that provides a restoring force between the front journal 120 and the cam shaft 200.

상기 조절부(300)는 상기 캠 샤프트(200)의 상대적인 위치를 조절하도록 상기 캠 샤프트(200)의 길이방향으로 접촉하는 편심 캠(310)을 포함한다.The adjusting part 300 includes an eccentric cam 310 which contacts the cam shaft 200 in the longitudinal direction to adjust the relative position of the cam shaft 200.

상기 편심 캠(310)은 엔진의 작동 상태 등을 판단하는 ECU(electronic control unint;미도시)에 의하여 제어되며, ECU의 작동과 상기 편심 캠(310)의 각도 변화 등은 엔진의 요구성능에 따라 달라질 수 있고, 이러한 편심 캠(310)의 각도 제어는 당해 기술분야의 통상의 기술자가 본 발명의 상세한 설명을 통해 실현 가능하므로 자세한 설명은 생략한다.The eccentric cam 310 is controlled by an ECU (electronic control unint) (not shown) for determining the operation state of the engine, etc., the operation of the ECU and the change of the angle of the eccentric cam 310, etc. according to the required performance of the engine The angular control of the eccentric cam 310 can be changed by the person skilled in the art through the detailed description of the present invention, and thus the detailed description thereof will be omitted.

상기 매개부(400)는 상기 캠 샤프트(200)와 평행하게 구비된 로커 샤프트(410)와 상기 로커 샤프트(410)에 왕복운동 가능하게 구비된 로커 레버(420)를 포함한다.The intermediate part 400 includes a rocker shaft 410 provided in parallel with the cam shaft 200 and a rocker lever 420 provided to reciprocate on the rocker shaft 410.

상기 로커 레버(420)는 상기 경사 캠(210)과 접촉하는 경사부(422)와 상기 밸브 개폐부(500)와 접촉하는 출력부(424)를 포함한다.The rocker lever 420 includes an inclined portion 422 in contact with the inclined cam 210 and an output portion 424 in contact with the valve opening and closing portion 500.

상기 출력부(424)는 상기 로커 레버(420)가 왕복운동하여 상기 밸브 개폐부(500)의 밸브 리프트가 발생하는 리프트 구간(426)과 상기 밸브 개폐부(500)의 밸브 리프트가 발생하지 않는 제로 리프트 구간(428)을 포함한다.The output unit 424 includes a lift section 426 in which the rocker lever 420 reciprocates to generate a valve lift of the valve opening and closing part 500, and a zero lift in which the valve lift of the valve opening and closing part 500 does not occur. Section 428.

즉, 상기 리프트 구간(426)과 상기 밸브 개폐부(500)가 접촉하는 동안에는 의 밸브(510)가 열리게 되고, 제로 리프트 구간(428)과 상기 밸브 개폐부(500)가 접촉하는 동안에는 상기 밸브(510)가 열리지 않는다.That is, the valve 510 is opened while the lift section 426 is in contact with the valve opening / closing part 500, and the valve 510 is opened while the zero lift section 428 is in contact with the valve opening part 500. Does not open.

이하, 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 작동에 대하여 설명한다.Hereinafter, the operation of the continuous variable valve lift apparatus according to the embodiment of the present invention will be described.

도4는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 로우 리프트모드에서의 작동을 나타내는 도면이고, 도5는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 하이 리프트모드에서의 작동을 나타내는 도면이다.Figure 4 is a view showing the operation in the low lift mode of the continuous variable valve lift apparatus according to the embodiment of the present invention, Figure 5 is a view showing the operation in the high lift mode of the continuous variable valve lift apparatus according to the embodiment of the present invention. It is a figure which shows.

도4에 도시된 바와 같이, 엔진의 요구 부하가 작아 로우 리프트 모드가 되면, 상기 편심 캠(310)이 회전하여 상기 캠 샤프트(200)의 위치가 상대적으로 상기 캠 샤프트 스프로켓(110)으로부터 멀어지게 된다.As shown in FIG. 4, when the required load of the engine is small and the low lift mode is applied, the eccentric cam 310 is rotated so that the position of the cam shaft 200 is relatively far from the cam shaft sprocket 110. do.

그러면 상기 경사 캠(210)과 상기 경사부(422)의 상기 캠 샤프트(200)에 대한 기울기와 상기 편심 캠(310)의 편심 크기에 따라 상기 밸브(510)의 개폐량과 개폐시간이 상대적으로 짧아지게 된다. 즉, 도2에 도시된 상기 제로 리프트 구간(428)과 상기 밸브 개폐부(500)가 접촉하는 구간이 길어지게 된다.Then, the opening / closing time and opening / closing time of the valve 510 are relatively different according to the inclination of the cam shaft 200 of the inclined cam 210 and the inclined portion 422 and the eccentric size of the eccentric cam 310. Will be shortened. That is, the section in which the zero lift section 428 and the valve opening / closing part 500 are in contact with each other becomes longer.

엔진의 요구 부하가 커져 하이 리프트 모드가 되면, 도5에 도시된 바와 같이 상기 편심 캠(310)이 회전하여 상기 캠 샤프트(200)의 위치가 상대적으로 상기 캠 샤프트 스프로켓(110)으로부터 가까워 지게 된다.When the required load of the engine is increased to enter the high lift mode, as shown in FIG. 5, the eccentric cam 310 is rotated so that the position of the cam shaft 200 is relatively close to the cam shaft sprocket 110. .

그러면 상기 경사 캠(210)과 상기 경사부(422)의 상기 캠 샤프트(200)에 대한 기울기와 상기 편심 캠(310)의 편심 크기에 따라 상기 밸브(510)의 개폐량과 개폐시간이 상대적으로 길어지게 된다. 즉, 도2에 도시된 상기 제로 리프트 구간(428)과 상기 밸브 개폐부(500)가 접촉하는 구간이 짧아지고, 상기 리프트 구간(426)과 상기 밸브 개폐부(500)가 접촉하는 시간이 길어지게 된다.Then, the opening / closing time and opening / closing time of the valve 510 are relatively different according to the inclination of the cam shaft 200 of the inclined cam 210 and the inclined portion 422 and the eccentric size of the eccentric cam 310. It will be longer. That is, the section in which the zero lift section 428 and the valve opening / closing part 500 come into contact with each other becomes shorter, and the time between the lift section 426 and the valve opening / closing part 500 becomes long. .

도6은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 밸브 리프트프로파일 변화를 나타내는 도면이다.6 is a view showing a valve lift profile change of the continuous variable valve lift apparatus according to an embodiment of the present invention.

도6에 도시된 바와 같이 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치는 같이 간단한 편심 캠의 작동과 경사 캠과 경사부의 기울기에 의하여 엔진에 요구되는 최적의 밸브 리프트 프로파일을 얻을 수 있다.As shown in FIG. 6, the continuous variable valve lift apparatus according to the embodiment of the present invention can obtain the optimum valve lift profile required for the engine by the simple operation of the eccentric cam and the inclination of the inclined cam and the inclined portion.

또한, 상기 출력부(424)의 형상 설계에 따라서는 CDA(cylinder deactivation)모드로 운전하는 것도 가능하다.In addition, depending on the shape design of the output unit 424, it is also possible to operate in the CDA (cylinder deactivation) mode.

이상으로 본 발명에 관한 바람직한 실시예를 설명하였으나, 본 발명은 상기 실시예에 한정되지 아니하며, 본 발명의 실시예로부터 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의한 용이하게 변경되어 균등하다고 인정되는 범위의 모든 변경을 포함한다. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

도1은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 구성을 개략적으로 나타내는 사시도이다.1 is a perspective view schematically showing the configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention.

도2는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 구성을 개략적으로 나타내는 정면도이다.2 is a front view schematically showing the configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention.

도3은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 각 구성을 개략적으로 나타내는 도면이다.3 is a diagram schematically showing each configuration of a continuous variable valve lift apparatus according to an embodiment of the present invention.

도4는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 로우 리프트모드에서의 작동을 나타내는 도면이다.4 is a view showing the operation in the low lift mode of the continuous variable valve lift apparatus according to an embodiment of the present invention.

도5는 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 하이 리프트모드에서의 작동을 나타내는 도면이다.5 is a view showing the operation in the high lift mode of the continuous variable valve lift apparatus according to an embodiment of the present invention.

도6은 본 발명의 실시예에 의한 연속 가변 밸브 리프트 장치의 밸브 리프트프로파일 변화를 나타내는 도면이다.6 is a view showing a valve lift profile change of the continuous variable valve lift apparatus according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100: 입력부 110: 캠 샤프트 스프로켓100: input unit 110: camshaft sprocket

120: 프론트 저널 130: 탄성부 120: front journal 130: elastic portion

200: 캠 샤프트 210: 경사 캠 200: cam shaft 210: inclined cam

300: 조절부 310: 편심 캠300: control unit 310: eccentric cam

400: 매개부 410: 로커 샤프트400: medium 410: rocker shaft

420: 로커 레버 422: 경사부420: rocker lever 422: inclined portion

424: 출력부 426: 리프트 구간424: output unit 426: lift section

428: 제로 리프트 구간 500: 밸브 개폐부428: zero lift section 500: valve opening and closing portion

Claims (7)

회전력을 전달받는 입력부;An input unit receiving a rotation force; 상기 입력부의 회전력을 전달받으며 길이방향으로 상대적인 위치가 변동 가능하도록 연결된 캠 샤프트;A cam shaft which receives the rotational force of the input unit and is connected to change a relative position in a longitudinal direction; 상기 캠 샤프트의 상대적인 위치를 조절하도록 구비된 조절부;An adjusting unit provided to adjust a relative position of the cam shaft; 상기 캠 샤프트의 길이 방향으로 그 단면이 경사지게 형성되어 상기 캠 샤프트에 구비된 경사 캠;An inclined cam formed to be inclined in the longitudinal direction of the cam shaft and provided to the cam shaft; 경사진 형상으로 상기 경사 캠의 회전을 전달받아 왕복 운동하는 매개부; 및Intermediate for receiving the rotation of the inclined cam in the inclined shape to reciprocate; And 상기 매개부의 왕복 운동에 의하여 개폐되는 밸브 개폐부;A valve opening and closing portion opened and closed by a reciprocating motion of the intermediate portion; 를 포함하는 연속 가변 밸브 리프트 장치.Continuously variable valve lift apparatus comprising a. 제1항에서,In claim 1, 상기 입력부는 프론트 저널을 포함하고, The input unit includes a front journal, 상기 캠 샤프트와 상기 프론트 저널은 회전력을 전달하며 길이 방향으로 상대적인 위치가 변동 가능하도록 연결된 것을 특징으로 하는 연속 가변 밸브 리프트 장치.The cam shaft and the front journal is a continuous variable valve lift device, characterized in that the transfer of the rotational force is connected so that the relative position in the longitudinal direction is variable. 제2항에서In claim 2 상기 입력부는,The input unit, 캠 샤프트 스프로켓; 및 Camshaft sprockets; And 상기 프론트 저널과 상기 캠 샤프트 사이에서 복원력을 제공하도록 구비된 탄성부;An elastic portion provided to provide a restoring force between the front journal and the cam shaft; 를 더 포함하는 것을 특징으로 하는 연속 가변 밸브 리프트 장치.Continuously variable valve lift apparatus further comprising a. 제1항에서In claim 1 상기 조절부는,The control unit, 상기 캠 샤프트의 상대적인 위치를 조절하도록 상기 캠 샤프트의 길이방향으로 접촉하는 편심 캠을 포함하는 것을 특징으로 하는 연속 가변 밸브 리프트 장치.And an eccentric cam in the longitudinal direction of the cam shaft to adjust the relative position of the cam shaft. 제1항에서In claim 1 상기 매개부는,The intermediate unit, 상기 캠 샤프트와 평행하게 구비된 로커 샤프트; 및A rocker shaft provided in parallel with the cam shaft; And 상기 로커 샤프트에 왕복운동 가능하게 구비된 로커 레버;A rocker lever provided reciprocally on the rocker shaft; 를 포함하는 것을 특징으로 하는 연속 가변 밸브 리프트 장치.Continuously variable valve lift apparatus comprising a. 제5항에서In paragraph 5 상기 로커 레버는,The rocker lever, 상기 경사 캠과 접촉하는 경사부; 및An inclined portion in contact with the inclined cam; And 상기 밸브 개폐부와 접촉하는 출력부;An output part in contact with the valve opening and closing part; 를 포함하는 것을 특징으로 하는 연속 가변 밸브 리프트 장치.Continuously variable valve lift apparatus comprising a. 제6항에서In paragraph 6 상기 출력부는,The output unit, 상기 로커 레버가 왕복운동하여 상기 밸브 개폐부의 밸브 리프트가 발생하는리프트 구간과 상기 밸브 개폐부의 밸브 리프트가 발생하지 않는 제로 리프트 구간을 포함하는 것을 특징으로 하는 연속 가변 밸브 리프트 장치.And a lift section in which the rocker lever reciprocates to generate a valve lift of the valve opening and closing portion and a zero lift section in which the valve lift of the valve opening and closing portion does not occur.
KR1020080040846A 2008-04-30 2008-04-30 Continuous variable valve lift apparatus KR20090114947A (en)

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KR1020080040846A KR20090114947A (en) 2008-04-30 2008-04-30 Continuous variable valve lift apparatus
JP2008290146A JP2009270563A (en) 2008-04-30 2008-11-12 Continuous variable valve lift apparatus
US12/324,549 US20090272346A1 (en) 2008-04-30 2008-11-26 Continuous variable valve lift apparatus
CN2008101894449A CN101571062B (en) 2008-04-30 2008-12-24 Continuous variable valve lift apparatus
DE102008063337A DE102008063337A1 (en) 2008-04-30 2008-12-30 Continuously adjustable valve lift

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WO2012048309A1 (en) * 2010-10-08 2012-04-12 Pinnacle Engines, Inc. Internal combustion engine valve actuation and adjustable lift and timing
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CN101571062A (en) 2009-11-04
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JP2009270563A (en) 2009-11-19
DE102008063337A1 (en) 2009-11-05

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