KR20060023334A - Dual continuous variable valve timing apparatus of an engine - Google Patents

Dual continuous variable valve timing apparatus of an engine Download PDF

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KR20060023334A
KR20060023334A KR1020040072150A KR20040072150A KR20060023334A KR 20060023334 A KR20060023334 A KR 20060023334A KR 1020040072150 A KR1020040072150 A KR 1020040072150A KR 20040072150 A KR20040072150 A KR 20040072150A KR 20060023334 A KR20060023334 A KR 20060023334A
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South Korea
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camshaft
actuator
engine
variable valve
cam shaft
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KR1020040072150A
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Korean (ko)
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KR100969114B1 (en
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박치훈
박성영
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현대자동차주식회사
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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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

본 발명은 흡/배기 캠샤프트를 각각 연속적으로 지각 또는 진각 시킴에 있어서, 상대적으로 적은 오일 유량으로 원활한 작동이 이루어질 수 있도록 하여, 엔진의 저속토크 안정성 및 엔진의 저속운전시에 가변 밸브 타이밍 장치의 작동 안정성을 확보하고, 듀얼 연속 가변 밸브 타이밍 장치가 보다 간단한 구성으로 이루어질 수 있도록 한다.
According to the present invention, in continuous perception or advance of the intake / exhaust camshaft, respectively, smooth operation can be performed at a relatively low oil flow rate. It ensures operational stability and allows dual continuous variable valve timing devices to be made in a simpler configuration.

Description

엔진의 듀얼 연속 가변 밸브 타이밍 장치{dual continuous variable valve timing apparatus of an engine}Dual continuous variable valve timing apparatus

도 1은 본 발명에 따른 엔진의 듀얼 연속 가변 밸브 타이밍 장치의 구성을 설명한 개념도,1 is a conceptual diagram illustrating the configuration of a dual continuous variable valve timing apparatus of an engine according to the present invention;

도 2는 본 발명에 따른 작용 효과를 설명하기 위한 도면이다.2 is a view for explaining the operation and effect according to the present invention.

<도면의 주요 부분에 대한 부호의 간단한 설명><Brief description of symbols for the main parts of the drawings>

1; 제1캠샤프트 3; 제2캠샤프트One; First camshaft 3; 2nd camshaft

5; 제1액츄에이터 7; 제1오일컨트롤밸브5; First actuator 7; 1st Oil Control Valve

9; 제2액츄에이터 11; 제2오일컨트롤밸브9; Second actuator 11; 2nd oil control valve

13; 오일필터 15; 엔진컨트롤유닛13; Oil filter 15; Engine Control Unit

17; 스프로켓 19; 하우징17; Sprocket 19; housing

본 발명은 엔진의 듀얼 연속 가변 밸브 타이밍 장치에 관한 것으로서, 보다 상세하게는 흡기밸브의 개폐 타이밍 및 배기밸브의 개폐 타이밍을 모두 연속적으로 조절하도록 하는 기술에 관한 것이다.The present invention relates to a dual continuous variable valve timing apparatus of an engine, and more particularly, to a technique for continuously adjusting both the opening and closing timing of the intake valve and the opening and closing timing of the exhaust valve.

연속 가변 밸브 타이밍 장치는 흡기밸브와 배기밸브의 개폐시기를 엔진의 운전상태에 따라서 연속적으로 조절할 수 있도록 함으로써, 엔진의 출력을 향상시키고, 배기가스의 유해성분을 저감시키며, 아울러 연비를 향상시키도록 한다.Continuously variable valve timing device can continuously adjust the opening and closing times of the intake valve and the exhaust valve according to the operating state of the engine, thereby improving the output of the engine, reducing harmful components of the exhaust gas, and improving fuel efficiency. do.

상기한 바와 같은 연속 가변 밸브 타이밍 장치는 통상 실린더헤드에서 흡/배기 캠샤프트를 진각 또는 지각시키기 위한 메커니즘으로 구성되어 있는데, 흡/배기 캠샤프트스프로켓에 대하여 흡/배기 캠샤프트를 진각 또는 지각시키기 위한 각각의 액츄에이터를 구비하고, 이 액츄에이터들에 작동오일을 공급하기 위한 각각의 오일공급체계를 갖추고 있다.The continuous variable valve timing device as described above is generally composed of a mechanism for advancing or perceiving the intake / exhaust camshaft in the cylinder head, and for advancing or perceiving the intake / exhaust camshaft with respect to the intake / exhaust camshaft sprocket. Each actuator is provided with a separate oil supply system for supplying the operating oil to the actuators.

본 발명은 흡/배기 캠샤프트를 각각 연속적으로 지각 또는 진각 시킴에 있어서, 상대적으로 적은 오일 유량으로 원활한 작동이 이루어질 수 있도록 하여, 엔진의 저속운전시에 가변 밸브 타이밍 장치의 작동 안정성을 확보하고, 보다 간단한 구성으로 이루어질 수 있도록 한 엔진의 듀얼 연속 가변 밸브 타이밍 장치를 제공함에 그 목적이 있다.According to the present invention, in the continuous intake or exhaust of the intake / exhaust camshaft, respectively, the smooth operation can be performed at a relatively low oil flow rate, thereby ensuring the operational stability of the variable valve timing device during low speed operation of the engine. It is an object of the present invention to provide a dual continuous variable valve timing apparatus of an engine so that a simpler configuration can be achieved.

상기한 바와 같은 목적을 달성하기 위한 본 발명 엔진의 듀얼 연속 가변 밸브 타이밍 장치는Dual continuous variable valve timing device of the engine of the present invention for achieving the above object is

제1캠샤프트 및 제2캠샤프트와;A first camshaft and a second camshaft;

크랭크샤프트의 회전각에 대하여 상기 제1캠샤프트의 회전각을 제어하도록 상기 제1캠샤프트에 설치된 제1액츄에이터와;A first actuator installed on the first camshaft to control the rotational angle of the first camshaft with respect to the rotational angle of the crankshaft;

상기 제1액츄에이터에 작동 오일을 공급 및 배출시키는 제1오일컨트롤밸브와;A first oil control valve for supplying and discharging a working oil to the first actuator;

상기 제1캠샤프트의 회전각에 대하여 상기 제2캠샤프트의 회전각을 제어하도록 상기 제1캠샤프트에 설치된 제2액츄에이터와;A second actuator mounted to the first cam shaft so as to control the rotation angle of the second cam shaft with respect to the rotation angle of the first cam shaft;

상기 제2액츄에이터에 작동 오일을 공급 및 배출시키는 제2오일컨트롤밸브;A second oil control valve for supplying and discharging a working oil to the second actuator;

를 포함하여 구성된 것을 특징으로 한다.Characterized in that configured to include.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1을 참조하면, 본 발명 실시예는 제1캠샤프트(1) 및 제2캠샤프트(3)와; 크랭크샤프트의 회전각에 대하여 상기 제1캠샤프트(1)의 회전각을 제어하도록 상기 제1캠샤프트(1)에 설치된 제1액츄에이터(5)와; 상기 제1액츄에이터(5)에 작동 오일을 공급 및 배출시키는 제1오일컨트롤밸브(7)와; 상기 제1캠샤프트(1)의 회전각에 대하여 상기 제2캠샤프트(3)의 회전각을 제어하도록 상기 제1캠샤프트(1)에 설치된 제2액츄에이터(9)와; 상기 제2액츄에이터(9)에 작동 오일을 공급 및 배출시키는 제2오일컨트롤밸브(11)를 포함하여 구성된다.1, an embodiment of the present invention includes a first camshaft 1 and a second camshaft 3; A first actuator (5) installed in the first cam shaft (1) to control the rotation angle of the first cam shaft (1) with respect to the rotation angle of the crankshaft; A first oil control valve (7) for supplying and discharging a working oil to the first actuator (5); A second actuator (9) installed in the first cam shaft (1) to control the rotation angle of the second cam shaft (3) with respect to the rotation angle of the first cam shaft (1); It is configured to include a second oil control valve 11 for supplying and discharging the operating oil to the second actuator (9).

상기 제1캠샤프트(1)와 제2캠샤프트(3)는 흡기캠샤프트와 배기캠샤프트를 상호 선택적으로 표현하기 위한 표현으로서, 상기 제1캠샤프트(1)가 흡기캠샤프트이면 상기 제2캠샤프트(3)는 배기캠샤프트이며, 상기 제1캠샤프트(1)가 배기캠샤프트이면 상기 제2캠샤프트(3)는 흡기캠샤프트이다. The first camshaft 1 and the second camshaft 3 are expressions for selectively expressing the intake camshaft and the exhaust camshaft. When the first camshaft 1 is the intake camshaft, the second camshaft The camshaft 3 is an exhaust camshaft. If the first camshaft 1 is an exhaust camshaft, the second camshaft 3 is an intake camshaft.                     

상기 제1오일컨트롤밸브(7)와 제2오일컨트롤밸브(11)는 하나의 오일필터(13)를 경유한 오일을 제공받도록 되어 있고, 엔진컨트롤유닛(15)에 의하여 각각 전자적으로 제어될 수 있도록 되어 있다.The first oil control valve 7 and the second oil control valve 11 are configured to receive oil via one oil filter 13 and may be electronically controlled by the engine control unit 15, respectively. It is supposed to be.

상기 제1액츄에이터(5)의 스프로켓(17)은 크랭크샤프트에 체인이나 타이밍벨트 등으로 연결되어 회전력을 전달받도록 되어 있고, 하우징(19)은 상기 제1캠샤프트(1)에 고정된 구조로서, 상기 제1오일컨트롤밸브(7)에서 제공된 작동 오일에 따라서, 상기 하우징(19)과 스프로켓(17) 사이의 회전위상을 가변시킴으로써, 상기 크랭크샤프트의 회전위상에 대하여 상기 제1캠샤프트(1)의 회전위상을 진각 또는 지각시킬 수 있도록 하고 있는바, 이와 같은 단일 액츄에이터의 메커니즘은 이미 공지된 기술과 같다.The sprocket 17 of the first actuator 5 is connected to the crankshaft by a chain or a timing belt to receive rotational force, and the housing 19 is a structure fixed to the first camshaft 1. The first camshaft 1 with respect to the rotational phase of the crankshaft is varied by varying the rotational phase between the housing 19 and the sprocket 17 in accordance with the operating oil provided by the first oil control valve 7. It is possible to advance or perceive the rotational phase of the bar, the mechanism of such a single actuator is the same as the known art.

상기 제2액츄에이터(9)의 하우징(19)은 상기 제1캠샤프트(1)에 고정되며, 스프로켓(17)은 체인이나 타이밍벨트 등으로 상기 제2캠샤프트(3)에 연결되는 구조이다. 따라서, 상기 제2액츄에이터(9)의 경우 회전력은 상기 하우징(19)을 통해서 입력되고, 상기 스프로켓(17)을 통하여 상기 하우징(19)의 회전위상에 대하여 진각 또는 지각된 회전위상이 상기 제2캠샤프트(3)로 전달되게 된다.The housing 19 of the second actuator 9 is fixed to the first cam shaft 1, and the sprocket 17 is connected to the second cam shaft 3 by a chain or a timing belt. Therefore, in the case of the second actuator (9), the rotational force is input through the housing (19), and through the sprocket (17) the rotational phase of the second or the latent phase relative to the rotational phase of the housing (19) is the second phase. To the camshaft (3).

결과적으로, 상기 제2캠샤프트(3)의 회전위상은 상기 크랭크샤프트에 대한 제1캠샤프트(1)의 회전위상 변화와 상기 제2액츄에이터(9)에 의한 회전위상의 변화가 합해진 결과를 가지게 된다.As a result, the rotational phase of the second camshaft 3 has a result of the sum of the rotational phase change of the first camshaft 1 with respect to the crankshaft and the change of the rotational phase by the second actuator 9. do.

상기 제1캠샤프트(1)가 흡기캠샤프트인 경우를 가정하여, 상기한 바와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다. Assuming that the first cam shaft 1 is an intake cam shaft, the operation of the present invention configured as described above will be described below.                     

상기 제1오일컨트롤밸브(7)에서 상기 제1액츄에이터(5)에 진각에 필요한 작동 오일공급상태를 형성하면, 상기 제1액츄에이터(5)의 하우징(19)은 상기 흡기캠샤프트의 회전위상을 크랭크샤프트와 직결되어 있는 상기 스프로켓(17)의 회전위상보다 진각시키도록 상대적으로 회전된다.When the first oil control valve 7 forms the operating oil supply state required for the advance of the first actuator 5, the housing 19 of the first actuator 5 rotates the phase of the intake camshaft. It is relatively rotated to advance more than the rotational phase of the sprocket 17 directly connected to the crankshaft.

이때, 상기 흡기캠샤프트의 회전위상이 진각되면, 상기 흡기캠샤프트상에 고정된 상기 제2액츄에이터(9)의 하우징(19)도 동일한 위상으로 진각되어, 상기 제2액츄에이터(9)에 아무런 작동 오일의 변화가 없다면, 상기 제2액츄에이터(9)의 스프로켓(17)으로 연결된 배기캠샤프트도 동일한 위상으로 진각이 이루어지는 결과가 된다.At this time, when the rotational phase of the intake camshaft is advanced, the housing 19 of the second actuator 9 fixed on the intake camshaft is also advanced in the same phase, and no operation is performed on the second actuator 9. If there is no change in oil, the exhaust camshaft connected to the sprocket 17 of the second actuator 9 also results in an advance in the same phase.

즉, 흡기밸브의 타이밍과 배기밸브의 타이밍을 동시에 동일한 위상각만큼 진각 또는 지각 시키는 것은, 상기 제1액츄에이터(5)의 작동만으로 이루어지게 된다.That is, advancing or retarding the timing of the intake valve and the timing of the exhaust valve at the same time by the same phase angle is made only by the operation of the first actuator 5.

만약, 어떤 시점에 흡기캠샤프트의 진각량과 배기캠샤프트의 진각량이 서로 달라서, 도 2의 좌측에 도시된 것처럼, 흡기캠샤프트의 진각량이 40크랭크각, 배기캠샤프트의 진각량이 45크랭크각만큼 변화될 필요가 있을 때, 종래에 각각의 캠샤프트에 액츄에이터가 구비된 경우에는 각각의 진각량을 형성하기 위한 거의 비슷한 양의 작동 오일의 공급 유량이 소요되었으나, 본 발명의 경우에는, 도 2의 우측에 도시된 것처럼, 흡기캠샤프트의 진각량을 40크랭크각만큼 이루어지도록 상기 제1액츄에이터(5)를 제어하고, 상기 제2액츄에이터(9)에는 5크랭크각만큼만 진각이 이루어지도록 제어하면, 도 2의 좌측과 동일한 상태의 위상각 진각의 효과를 얻을 수 있는 것이다.If, at some point, the advance amount of the intake camshaft and the advance amount of the exhaust camshaft are different from each other, as shown in the left side of FIG. When it is necessary to change, conventionally, when an actuator is provided in each camshaft, a flow rate of supplying oil of substantially the same amount to form each advance amount is required. However, in the case of the present invention, FIG. As shown on the right, if the first actuator 5 is controlled to make the advance amount of the intake camshaft by 40 crank angles, and the second actuator 9 is controlled to be made only by 5 crank angles, FIG. The effect of phase angle advancement in the same state as the left side of 2 can be obtained.

물론, 흡기캠샤프트와 배기캠샤프트의 위상각 오버랩이 증가될 필요가 있는 경우에는 상기 흡기캠샤프트의 진각에 대하여 상기 배기캠샤프트는 역으로 지각키는 방법에 의해서, 위상각의 상대적인 변화량만을 상기 제2액츄에이터(9)가 소화하도록 하면 된다.Of course, when the phase angle overlap between the intake cam shaft and the exhaust cam shaft needs to be increased, the exhaust cam shaft is inversely retarded with respect to the true angle of the intake cam shaft. What is necessary is just to let the 2nd actuator 9 extinguish.

따라서, 종래와 같이 흡/배기밸브의 어떤 필요한 진각 또는 지각 상태를 구현하기 위해서는, 2개의 액츄에이터를 동시에 거의 같은 량만큼 제어할 수 있는 상대적으로 많은 양의 작동 오일의 유량이 확보되어야 하지만, 상기한 바와 같은 본 발명 실시예에서는, 하나의 액츄에이터는 종래와 동일 수준의 유량이 소요되고, 나머지 다른 하나의 액츄에이터는 종래보다 훨씬 적은 유량이 소요되거나, 별도의 작동이 요구되지 않는 경우가 많으므로, 종래에 비하여, 듀얼 연속 가변 밸브 타이밍 장치를 작동시키는 데에 소요되는 오일 유량의 전체적인 저감을 가져오게 된다.Thus, in order to realize any necessary progress or perception of the intake / exhaust valve as in the prior art, a relatively large flow rate of the operating oil capable of controlling two actuators at about the same amount must be ensured. In the embodiment of the present invention as described above, one actuator takes the same flow rate as the conventional one, and the other one takes much less flow than the conventional one, or a separate operation is often not required. In comparison, this results in an overall reduction in the oil flow required to operate the dual continuous variable valve timing device.

이는 듀얼 연속 가변 밸브 타이밍 장치를 구동하는 데에 사용되는 오일펌프의 용량 축소가 가능하게 하여, 엔진의 저속토크를 비교적 안정되게 할 수 있으며, 엔진의 저속운전상태에서 듀얼 연속 가변 밸브 타이밍 장치 자체의 작동 안정성 및 신뢰성을 향상시킬 수 있도록 한다.This makes it possible to reduce the capacity of the oil pump used to drive the dual continuous variable valve timing device, thereby making the low speed torque of the engine relatively stable, and in the low speed operation state of the engine, To improve the operational stability and reliability.

이와 같이 엔진의 저속 운전시에도 듀얼 연속 가변 밸브 타이밍 장치의 작동 안정성 및 신뢰성이 확보되면, 페일 세이프(fail safe) 기능의 안정성을 확보하기 위한 추가의 복잡한 구성 등이 불필요해지는 부수적 효과도 얻을 수 있다.As such, when the operation stability and reliability of the dual continuous variable valve timing device are secured even at low speed of the engine, the additional effect of eliminating additional complicated configuration for securing the stability of the fail safe function can be obtained. .

이상과 같이 본 발명에 의하면, 흡/배기 캠샤프트를 각각 연속적으로 지각 또는 진각 시킴에 있어서, 상대적으로 적은 오일 유량으로 원활한 작동이 이루어질 수 있도록 하여, 엔진의 저속토크 안정성 및 엔진의 저속운전시에 가변 밸브 타이밍 장치의 작동 안정성을 확보하고, 듀얼 연속 가변 밸브 타이밍 장치가 보다 간단한 구성으로 이루어질 수 있도록 한다. As described above, according to the present invention, in the continuous intake or exhaust of the intake / exhaust camshaft, respectively, the smooth operation can be performed at a relatively low oil flow rate, so that the low-speed torque stability of the engine and the low-speed operation of the engine Operational stability of the variable valve timing device is ensured, and the dual continuous variable valve timing device can be made simpler.

Claims (2)

제1캠샤프트 및 제2캠샤프트와;A first camshaft and a second camshaft; 크랭크샤프트의 회전각에 대하여 상기 제1캠샤프트의 회전각을 제어하도록 상기 제1캠샤프트에 설치된 제1액츄에이터와;A first actuator installed on the first camshaft to control the rotational angle of the first camshaft with respect to the rotational angle of the crankshaft; 상기 제1액츄에이터에 작동 오일을 공급 및 배출시키는 제1오일컨트롤밸브와;A first oil control valve for supplying and discharging a working oil to the first actuator; 상기 제1캠샤프트의 회전각에 대하여 상기 제2캠샤프트의 회전각을 제어하도록 상기 제1캠샤프트에 설치된 제2액츄에이터와;A second actuator mounted to the first cam shaft so as to control the rotation angle of the second cam shaft with respect to the rotation angle of the first cam shaft; 상기 제2액츄에이터에 작동 오일을 공급 및 배출시키는 제2오일컨트롤밸브;A second oil control valve for supplying and discharging a working oil to the second actuator; 를 포함하여 구성된 것을 특징으로 하는 엔진의 듀얼 연속 가변 밸브 타이밍 장치.Dual continuous variable valve timing device of the engine, characterized in that configured to include. 제1항에 있어서,The method of claim 1, 상기 제1액츄에이터의 스프로켓은 크랭크샤프트에 연결되고, 하우징은 상기 제1캠샤프트에 고정되며;The sprocket of the first actuator is connected to a crankshaft and the housing is fixed to the first camshaft; 상기 제2액츄에이터의 하우징은 상기 제1캠샤프트에 고정되며, 스프로켓은 상기 제2캠샤프트에 연결되는 것The housing of the second actuator is fixed to the first cam shaft, the sprocket is connected to the second cam shaft 을 특징으로 하는 엔진의 듀얼 연속 가변 밸브 타이밍 장치.Dual continuous variable valve timing device of the engine, characterized in that.
KR1020040072150A 2004-09-09 2004-09-09 dual continuous variable valve timing apparatus of an engine KR100969114B1 (en)

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US9169745B2 (en) 2013-09-06 2015-10-27 Hyundai Motor Company Engine having continuously variable valve timing mechanism

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JP2000234505A (en) 1998-12-16 2000-08-29 Unisia Jecs Corp Valve timing change device for internal combustion engine
JP4040779B2 (en) 1998-12-25 2008-01-30 ヤマハ発動機株式会社 Engine valve timing control device and valve timing control method
JP4343396B2 (en) 2000-05-23 2009-10-14 ヤマハ発動機株式会社 Engine variable valve timing mechanism
JP4336057B2 (en) 2000-10-04 2009-09-30 ヤマハ発動機株式会社 Variable valve timing mechanism of valve gear

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9169745B2 (en) 2013-09-06 2015-10-27 Hyundai Motor Company Engine having continuously variable valve timing mechanism

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