KR20040100448A - responsibility improving apparatus of continuous variable valve timing actuator - Google Patents

responsibility improving apparatus of continuous variable valve timing actuator Download PDF

Info

Publication number
KR20040100448A
KR20040100448A KR1020030032820A KR20030032820A KR20040100448A KR 20040100448 A KR20040100448 A KR 20040100448A KR 1020030032820 A KR1020030032820 A KR 1020030032820A KR 20030032820 A KR20030032820 A KR 20030032820A KR 20040100448 A KR20040100448 A KR 20040100448A
Authority
KR
South Korea
Prior art keywords
rotor
chamber
valve
connection passage
responsiveness
Prior art date
Application number
KR1020030032820A
Other languages
Korean (ko)
Other versions
KR100521176B1 (en
Inventor
서준호
Original Assignee
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR10-2003-0032820A priority Critical patent/KR100521176B1/en
Publication of KR20040100448A publication Critical patent/KR20040100448A/en
Application granted granted Critical
Publication of KR100521176B1 publication Critical patent/KR100521176B1/en

Links

Classifications

    • 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
    • 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
    • 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
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members

Landscapes

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

Abstract

PURPOSE: A device for improving the responsiveness of a continuously variable valve timing actuator is provided to improve the responsiveness of the continuously variable valve timing actuator by increasing the rotational speed of a rotor to a housing. CONSTITUTION: A device for improving the responsiveness of a continuously variable valve timing actuator(1) comprises a connection passage(6) prepared in a rotor(5) to communicate an advance chamber(7) with a retard chamber(9) which are placed between the rotor and a housing(3) adjacent to each other, a valve unit installed to control the communication state of the connection passage, and a check valve(11) installed in the connection passage to allow the flow from the advance chamber to the retard chamber.

Description

연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치{responsibility improving apparatus of continuous variable valve timing actuator}Responsibility improving apparatus of continuous variable valve timing actuator

본 발명은 엔진의 연속 가변 밸브 타이밍(Continuous Variable ValveTiming: CVVT) 장치에 관한 것으로서, 보다 상세하게는 CVVT 액츄에이터의 응답성을 향상시키는 기술에 관한 것이다.The present invention relates to a continuous variable valve timing (CVVT) device of an engine, and more particularly to a technique for improving the responsiveness of a CVVT actuator.

CVVT 장치는 엔진의 밸브 개폐시기를 엔진의 운전 상태에 따라 연속적으로 가변시켜, 엔진이 전 운전영역에서 최적의 운전상태를 확보할 수 있도록 하는 장치로서, 이러한 메커니즘 중의 하나는 캠샤프트스프로켓에 대한 캠샤프트의 회전 위상을 가변시키는 방법에 의해 밸브의 개폐시기를 조절하며, 여기에 사용되는 액츄에이터는 외측을 이루는 하우징이 상기 캠샤프트스프로켓에 일체로 연결되어 크랭크샤프트로부터의 회전력을 타이밍벨트나 타이밍체인을 통해 전달받고, 내측의 로터는 상기 캠샤프트에 연결되어, 상기 하우징과 로터의 상대회전이 캠샤프트스프로켓에 대한 캠샤프트의 위상을 변화시키도록 하는 메커니즘이다.The CVVT device continuously changes the valve opening and closing timing of the engine according to the operating state of the engine, so that the engine can obtain an optimal operating state in the entire operating region. The opening and closing timing of the valve is controlled by varying the rotational phase of the shaft, and the actuator used here has an outer housing which is integrally connected to the camshaft sprocket so that the rotational force from the crankshaft can be adjusted to the timing belt or the timing chain. The inner rotor is connected to the camshaft so that relative rotation of the housing and the rotor changes the phase of the camshaft relative to the camshaft sprocket.

상기와 같은 메커니즘에서 밸브타이밍을 지각시킬 때에는 로터가 하우징보다 천천히 회전되도록 하는 동작이 필요하므로, 그 응답성에 큰 문제가 없으나, 진각시킬 때에는 로터가 하우징보다 빨리 회전되어 앞선 위상을 갖도록 해야 하는데, 이때에는 큰 작동저항이 수반되므로 통상 신속한 응답성을 확보하기 어려운 문제점이 있다.In the above mechanism, since the rotor is rotated more slowly than the housing when the valve timing is perceived, there is no problem in the response. However, when advancing the rotor, the rotor is rotated faster than the housing to have the advanced phase. There is a problem in that it is usually difficult to ensure a quick response because it is accompanied by a large operating resistance.

이에 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 캠샤프트스프로켓에 연결된 하우징과 캠샤프트에 연결된 로터를 포함하여 구성되는 CVVT 액츄에이터에서 진각 작동시에 그 응답성을 향상시킬 수 있도록 한 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, to improve the responsiveness during the advance operation in the CVVT actuator comprising a housing connected to the cam shaft sprocket and a rotor connected to the cam shaft. It is an object of the present invention to provide an apparatus for improving the responsiveness of a continuously variable valve timing actuator.

도 1은 본 발명에 따른 CVVT 액츄에이터의 응답성 향상장치의 구성을 도시한 도면,1 is a view showing the configuration of an apparatus for improving the responsiveness of a CVVT actuator according to the present invention;

도 2는 도 1의 장치가 응답성 향상 작용을 하는 상태를 도시한 설명도이다.2 is an explanatory diagram showing a state in which the device of FIG.

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

1; CVVT 액츄에이터 3; 하우징One; CVVT actuator 3; housing

5; 로터 6; 연결통로5; Rotor 6; Connecting passage

7; 진각실 9; 지각실7; Acute chamber 9; Perception room

11; 체크밸브 13; 밸브스풀11; Check valve 13; Valve spool

15; 스프링 17; 작동포트15; Spring 17; Working port

19; 엔진컨트롤러 21; 솔레노이드밸브19; Engine controller 21; Solenoid valve

23; 유압펌프 25; 오일팬23; Hydraulic pump 25; Oil pan

상기한 바와 같은 목적을 달성하기 위한 본 발명 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치는 캠샤프트스프로켓에 연결된 하우징과 캠샤프트에 연결된 로터를 포함하여 구성되는 CVVT 액츄에이터에 있어서;The responsiveness improving device of the continuous variable valve timing actuator of the present invention for achieving the above object comprises a CVVT actuator comprising a housing connected to a cam shaft sprocket and a rotor connected to a cam shaft;

상기 로터와 하우징 사이에 서로 인접하게 마련된 진각실과 지각실 사이를 연통시키도록 상기 로터에 구비된 연결통로와;A connection passage provided in the rotor to communicate between the advance chamber and the perception chamber provided adjacent to each other between the rotor and the housing;

상기 연결통로의 연통상태를 조절할 수 있도록 설치된 밸브수단과;Valve means installed to control a communication state of the connection passage;

상기 지각실로부터 진각실로의 유동을 허용하도록 상기 연결통로에 설치된 체크밸브로 구성된 것을 특징으로 한다.And a check valve installed in the connection passage to allow flow from the crust chamber to the chamber.

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 1은 본 발명에 따른 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치의 구성을 도시한 것이며, 아울러 도 2와 비교하여 응답성 향상작용이 일어나지 않고 있는 상태를 도시하고 있다.FIG. 1 shows the configuration of the responsiveness improving device of the continuous variable valve timing actuator according to the present invention, and also shows a state where the responsiveness improving action does not occur as compared with FIG. 2.

본 발명에 사용되고 있는 CVVT 액츄에이터(1)는 하우징(3)이 캠샤프트스프로켓에 연결되고, 그 하우징(3) 내에 장착된 로터(5)가 캠샤프트에 연결되어, 유압에 의해 상기 하우징(3)에 대한 로터(5)의 회전 위상을 변화시킴으로써, 밸브타이밍을 진각 또는 지각 시킬 수 있도록 된 것이다.In the CVVT actuator 1 used in the present invention, the housing 3 is connected to the camshaft sprocket, and the rotor 5 mounted in the housing 3 is connected to the camshaft, and the housing 3 is operated by hydraulic pressure. By changing the rotational phase of the rotor 5 relative to, the valve timing can be advanced or perceived.

상기 로터(5)와 하우징(3) 사이에는 진각시에 유압을 공급하는 진각실(7)과 지각시에 유압을 공급하는 지각실(9)이 다수 구비되어 있는 바, 서로 인접하게 마련된 진각실(7)과 지각실(9) 사이를 연통시키도록 상기 로터(5)에 연결통로(6)를 구비하고, 상기 연결통로(6)의 연통상태를 조절할 수 있도록 밸브수단을 설치하며, 상기 지각실(9)로부터 진각실(7)로의 유동을 허용하고 그 반대의 유동은 차단하는 체크밸브(11)를 설치하였다.Between the rotor 5 and the housing 3, there are a plurality of advance chambers 7 for supplying hydraulic pressure at the time of advancing and a plurality of perceptual chambers 9 for supplying hydraulic pressure at the time of late arrival. A connection passage 6 is provided in the rotor 5 so as to communicate between the perception chamber 9 and the perception chamber 9, and a valve means is provided to adjust the communication state of the connection passage 6, A check valve 11 is provided that allows flow from the chamber 9 to the advance chamber 7 and blocks the flow on the contrary.

상기 밸브수단은 상기 로터(5)의 내에, 일렬로 배열된 두 개의 랜드 사이로 상기 연결통로(6)의 연통상태가 형성되도록 구성된 밸브스풀(13)과, 상기 밸브스풀(13)의 일측에 탄지된 스프링(15)과, 상기 밸브스풀(13)의 타측에 밸브스풀(13)의 작동압을 전달 받도록 구비된 작동포트(17)를 포함하여 구성하였다.The valve means includes a valve spool 13 configured to form a communication state of the connection passage 6 between two lands arranged in a row in the rotor 5, and a support on one side of the valve spool 13. Spring 15 and the other side of the valve spool 13 was configured to include an operating port 17 provided to receive the operating pressure of the valve spool 13.

여기서, 상기 작동포트(17)에 제공되는 작동유압은 엔진컨트롤러(19)에 의해 작동되는 3포트 2위치 솔레노이드밸브(21)에 의해 공급 및 드레인되도록 구성하였는데, 상기 솔레노이드밸브(21)는 엔진컨트롤러(19)에서 전기신호를 인가하면 도 2와 같이 유압펌프(23)로부터의 유압이 상기 작동포트(17)에 공급될 수 있는 유로를 형성하고, 상기 전기신호가 해제되면, 스프링(15)의 힘에 의해 상기 작동포트(17)로 공급되던 유압이 오일팬(25)으로 드레인되도록 유로를 형성한다.Here, the operating hydraulic pressure provided to the operation port 17 is configured to be supplied and drained by the three-port two-position solenoid valve 21 operated by the engine controller 19, the solenoid valve 21 is the engine controller When the electric signal is applied at 19, as shown in FIG. 2, the oil pressure from the hydraulic pump 23 forms a flow path through which the operation port 17 can be supplied. When the electric signal is released, the spring 15 A flow path is formed so that the hydraulic pressure supplied to the operation port 17 by the force is drained to the oil pan 25.

상기한 바와 같이 구성된 본 발명의 작용을 살펴보면 다음과 같다.Looking at the operation of the present invention configured as described above are as follows.

상기와 같은 구성을 갖추고 있는 CVVT 액츄에이터(1)에서 지각시의 작동은 종래와 마찬가지로 지각실(9)에 유압을 제공하고, 진각실(7)의 유압을 드레인시킴으로써, 캠샤프트에 연결된 로터(5)가 하우징(3)에 대하여 위상이 늦어지도록 함에 의해 이루어지고, 이어서 진각실(7)과 지각실(9) 양쪽의 유압출입을 차단하여 밸브타이밍 지각상태를 원하는 시간만큼 유지하게 된다.In the CVVT actuator 1 having the above-described configuration, the operation at the time of lateness is similar to the conventional case, by supplying hydraulic pressure to the crust chamber 9 and draining the hydraulic pressure of the advance chamber 7, thereby connecting the rotor 5 to the camshaft. ) Is made to be delayed with respect to the housing (3), and then the hydraulic access of both the advance chamber (7) and the perception chamber (9) is blocked to maintain the valve timing perceptual state for a desired time.

상기와 같은 상태로부터 진각이 필요한 경우에는 엔진컨트롤러(19)의 작동에 의해 상기 진각실(7)에 종래와 같은 방법으로 유압이 공급되고, 상기 지각실(9)의 유압이 배출되어 로터(5)는 하우징(3)에 대해 위상이 빠른 상태로 회전되어 진각 상태를 형성하게 된다.When the advance is necessary from the above state, the hydraulic pressure is supplied to the advance chamber 7 by the operation of the engine controller 19 in the same manner as the conventional method, and the hydraulic pressure of the perceptual chamber 9 is discharged so that the rotor 5 ) Rotates with respect to the housing 3 in a fast phase to form an advance state.

이때, 상기 엔진컨트롤러(19)는 상기 솔레노이드밸브(21)를 작동시켜 도 2에 도시된 바와 같은 상태로 전환시키는바, 유압펌프(23)로부터의 유압이 상기 작동포트(17)에 제공되어 밸브스풀(13)이 이동함에 의해 상기 연결통로(6)가 열리게 되어 지각실(9)의 압유는 상기 연결통로(6)를 통해 진각실(7)로 이동할 수 있게 된다.At this time, the engine controller 19 operates the solenoid valve 21 to switch to a state as shown in FIG. 2, and the hydraulic pressure from the hydraulic pump 23 is provided to the operation port 17 to provide a valve. As the spool 13 moves, the connection passage 6 is opened so that the pressure oil of the crust chamber 9 can move to the advance chamber 7 through the connection passage 6.

따라서, 진각실(7)에 압유가 제공되어 로터(5)가 지각실(9)의 체적을 줄이면서 회전될 때 지각실(9)의 압유를 보다 신속히 드레인시키는 효과와, 진각실(7)의 필요로 하는 압유를 보다 신속히 제공하는 효과를 동시에 얻게 되어, 로터(5)는 빠른 회전속도로 원하는 위상으로 이동할 수 있게 된다.Therefore, when the hydraulic oil is provided in the shell chamber 7 so that the rotor 5 is rotated while reducing the volume of the shell chamber 9, the oil shell of the shell chamber 9 is drained more quickly, and the shell chamber 7 At the same time to obtain the effect of providing the required pressure oil of the rotor, the rotor 5 is able to move to the desired phase at a high rotational speed.

이때, 상기 체크밸브(11)는 상기 지각실(9)의 압력이 진각실(7)의 압력보다 높은 동안에만 상기 연결통로(6)를 개방하여 지각실(9)로부터 진각실(7)로의 압유이동은 가능하되 진각실(7)로부터 지각실(9)로의 압유이동을 차단하도록 하여 안정된 진각 작동이 이루어질 수 있도록 하는 역할을 수행한다.At this time, the check valve 11 opens the connection passage 6 only while the pressure in the perception chamber 9 is higher than the pressure in the advance chamber 7, and thus, from the perception chamber 9 to the advance chamber 7. The pressure oil movement is possible but serves to block the pressure oil movement from the advance chamber 7 to the perception chamber 9 so that a stable advance operation can be made.

이상과 같이 본 발명에 의하면, 캠샤프트스프로켓에 연결된 하우징과 캠샤프트에 연결된 로터를 포함하여 구성되는 CVVT 액츄에이터에서, 상기 하우징과 로터 사이에 형성된 진각실과 지각실을 필요에 따라 연통시킬 수 있도록 함에 의해, 로터의 하우징에 대한 회전속도를 빠르게 하여, 진각 작동시에 그 응답성을 크게 향상시킬 수 있도록 한다.As described above, according to the present invention, in the CVVT actuator comprising a housing connected to the cam shaft sprocket and a rotor connected to the cam shaft, the shell and the perception chamber formed between the housing and the rotor can be communicated as necessary. In addition, the rotational speed of the rotor with respect to the housing can be increased to greatly improve the responsiveness during the advance operation.

Claims (3)

캠샤프트스프로켓에 연결된 하우징과 캠샤프트에 연결된 로터를 포함하여 구성되는 CVVT 액츄에이터에 있어서;A CVVT actuator comprising a housing connected to a cam shaft sprocket and a rotor connected to a cam shaft; 상기 로터와 하우징 사이에 서로 인접하게 마련된 진각실과 지각실 사이를 연통시키도록 상기 로터에 구비된 연결통로와;A connection passage provided in the rotor to communicate between the advance chamber and the perception chamber provided adjacent to each other between the rotor and the housing; 상기 연결통로의 연통상태를 조절할 수 있도록 설치된 밸브수단과;Valve means installed to control a communication state of the connection passage; 상기 지각실로부터 진각실로의 유동을 허용하도록 상기 연결통로에 설치된 체크밸브;A check valve installed in the connection passage to allow flow from the crust chamber to the chamber; 로 구성된 것을 특징으로 하는 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치.Responsiveness improving device for a continuous variable valve timing actuator, characterized in that consisting of. 제1항에 있어서, 상기 밸브수단은The method of claim 1, wherein the valve means 일렬로 배열된 두 개의 랜드 사이로 상기 연결통로의 연통상태가 형성되도록 구성된 밸브스풀과;A valve spool configured to form a communication state of the connection passage between two lands arranged in a line; 상기 밸브스풀의 일측에 탄지된 스프링과;A spring supported on one side of the valve spool; 상기 밸브스풀의 타측에 밸브스풀의 작동압을 전달 받도록 구비된 작동포트;An operation port provided to receive the operating pressure of the valve spool on the other side of the valve spool; 를 포함하여 구성된 것을 특징으로 하는 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치.Apparatus for improving the responsiveness of a continuous variable valve timing actuator comprising a. 제2항에 있어서, 상기 작동포트에 제공되는 작동유압은 엔진컨트롤러에 의해 작동되는 3포트 2위치 솔레노이드밸브에 의해 공급 및 드레인되도록 구성된 것The hydraulic pressure provided to the operation port is configured to be supplied and drained by a three-port two-position solenoid valve operated by an engine controller. 을 특징으로 하는 연속 가변 밸브 타이밍 액츄에이터의 응답성 향상장치.Apparatus for improving the responsiveness of a continuous variable valve timing actuator, characterized in that.
KR10-2003-0032820A 2003-05-23 2003-05-23 responsibility improving apparatus of continuous variable valve timing actuator KR100521176B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2003-0032820A KR100521176B1 (en) 2003-05-23 2003-05-23 responsibility improving apparatus of continuous variable valve timing actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2003-0032820A KR100521176B1 (en) 2003-05-23 2003-05-23 responsibility improving apparatus of continuous variable valve timing actuator

Publications (2)

Publication Number Publication Date
KR20040100448A true KR20040100448A (en) 2004-12-02
KR100521176B1 KR100521176B1 (en) 2005-10-12

Family

ID=37377838

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-2003-0032820A KR100521176B1 (en) 2003-05-23 2003-05-23 responsibility improving apparatus of continuous variable valve timing actuator

Country Status (1)

Country Link
KR (1) KR100521176B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101601556B1 (en) 2014-12-10 2016-03-09 현대자동차주식회사 Apparatus for preventing oil backdraft in intermediate phase cvvt
KR101646469B1 (en) 2015-06-26 2016-08-08 현대자동차주식회사 Rotation control apparatus of cvvt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101601556B1 (en) 2014-12-10 2016-03-09 현대자동차주식회사 Apparatus for preventing oil backdraft in intermediate phase cvvt
KR101646469B1 (en) 2015-06-26 2016-08-08 현대자동차주식회사 Rotation control apparatus of cvvt

Also Published As

Publication number Publication date
KR100521176B1 (en) 2005-10-12

Similar Documents

Publication Publication Date Title
EP1221540B1 (en) Multi-mode control system for variable camshaft timing devices
EP1113152B1 (en) Control valve strategy for vane-type variable camshaft timing system
CN102278159B (en) Flow rate control valve
JP2008516129A (en) Device for changing the control time of a gas exchange valve of an internal combustion engine
JP6542505B2 (en) Cylinder valve timing variable system in internal combustion engine
JPH06212918A (en) Variable valve timing control device in v-shped internal combustion engine
JP2011169215A (en) Control valve apparatus
GB2261931A (en) Valve timing control system for internal combustion engine
US5803029A (en) Valve performance controller for internal combustion engine
JP4291210B2 (en) Valve timing control device
JP4229464B2 (en) Phase variable device and camshaft phase variable device for internal combustion engine
JPWO2010007712A1 (en) Solenoid valve for variable valve timing adjustment device and variable valve timing adjustment system
KR100521176B1 (en) responsibility improving apparatus of continuous variable valve timing actuator
JP4340908B2 (en) Engine oil passage structure
JPH10103035A (en) Oil feeder for internal combustion engine
US20060065581A1 (en) Electromagnetic valve unit and engine cover unit
JP5034869B2 (en) Variable valve timing device
JP3104529B2 (en) Variable valve timing device and hydraulic control valve thereof
JP2007170180A (en) Variable valve gear of internal combustion engine
JP2001214723A (en) Structure of oil passage
JP2009138664A (en) Valve timing control device
JP4109795B2 (en) Valve operating characteristic variable device
JP4150128B2 (en) Valve operating characteristic variable device
JP2002242630A (en) Variable valve system of internal combustion engine
KR100969114B1 (en) dual continuous variable valve timing apparatus of an engine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120928

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20130927

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20140929

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee