KR20010061177A - Cam drive system and method for internal combustion engine - Google Patents

Cam drive system and method for internal combustion engine Download PDF

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Publication number
KR20010061177A
KR20010061177A KR1019990063665A KR19990063665A KR20010061177A KR 20010061177 A KR20010061177 A KR 20010061177A KR 1019990063665 A KR1019990063665 A KR 1019990063665A KR 19990063665 A KR19990063665 A KR 19990063665A KR 20010061177 A KR20010061177 A KR 20010061177A
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KR
South Korea
Prior art keywords
cam
oil
internal combustion
combustion engine
engine
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KR1019990063665A
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Korean (ko)
Inventor
오정한
Original Assignee
이계안
현대자동차주식회사
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Priority to KR1019990063665A priority Critical patent/KR20010061177A/en
Publication of KR20010061177A publication Critical patent/KR20010061177A/en

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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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE: A cam driving device and a control method thereof are provided to improve the output of an internal combustion engine and fuel efficiency and to reduce noise by varying the valve timing of intake and exhaust valves according to the driving condition of the engine. CONSTITUTION: An ECU(Electronic Control Unit)(22) decides an intake air flow rate during a travel. If the output of a vehicle falls during a travel, a solenoid valve(24) is controlled to open a first port and fill oil in a first chamber(52) by passing through an oil groove of a camshaft(42), a first connecting passage(48) and a first through hole(54). A first rib(60) receives the pressure of the oil in the first chamber, and a variable cam(28) is rotated. Then, the opening time of an intake valve becomes faster than a cam lift curve of another cam(61) the same as a cam lift curve. Thus, sufficient mixture is supplied and the output of a vehicle is increased.

Description

내연기관의 캠 구동장치 및 그 제어 방법{CAM DRIVE SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE}CAM DRIVE SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE}

본 발명은 내연기관의 캠 구동장치에 관한 것으로서, 보다 상세하게는 1개 실린더 내의 흡기 밸브 혹은 배기 밸브 1쌍중 하나를 각각의 밸브 타이밍 조정을 엔진의 구동 조건에 맞춰 가변시킴으로서 출력, 연비, 소음 저감 등을 가능하게 한 내연기관의 캠 구동장치 및 그 제어 방법에 관한 것이다.The present invention relates to a cam driving apparatus of an internal combustion engine, and more particularly, by adjusting each valve timing adjustment according to the driving conditions of the engine, one of the pair of intake valves or exhaust valves in one cylinder reduces output, fuel efficiency, and noise. The cam drive device of the internal combustion engine which enabled etc., and its control method are provided.

도1은 종래기술에 따른 캠 구동장치를 도시한 도면으로, 캠(2)과캠샤프트(4)는 회전중에 위치가 변함없도록 일체로 만들어져 있지만, 밸브 기구에 급격한 충격을 주지 않도록 하면서 밸브 기구의 개폐 작동을 위하여 캠(2) 자체의 형상은 노브(6)를 형성하고 있다.1 is a view showing a cam drive device according to the prior art, wherein the cam 2 and the cam shaft 4 are integrally made so that their position does not change during rotation, but the opening and closing of the valve mechanism is made while avoiding a sudden impact on the valve mechanism. For operation the shape of the cam 2 itself forms the knob 6.

DOHC 엔진에서는 배기와 흡기 밸브가 1개의 실린더당 2개씩 배치되어 구동되고, 이 밸브를 구동하기 위한 캠(8)(10)도 2개씩 배치되고 있다.In the DOHC engine, two exhaust and intake valves are disposed and driven per cylinder, and two cams 8 and 10 for driving the valve are also disposed.

이때 1개의 실린더내 흡기 밸브는 2개가 쌍을 이루어 동시에 움직이고, 배기 밸브도 마찬가지로 동일하게 작동한다.At this time, one in-cylinder intake valve moves in pairs at the same time, and the exhaust valve operates similarly.

도2의 그래프는 캠의 구동에 의해 형성되는 그래프로, 캠 리프트 곡선(G)으로 제1캠(8)과 제2캠(10)은 동일하게 구동하게 되어 있다.The graph of FIG. 2 is a graph formed by driving the cam, and the first cam 8 and the second cam 10 are driven in the same way by the cam lift curve G. As shown in FIG.

상기한 엔진에서 구동 조건에 따라 각각의 밸브 타이밍이 필요하고, 같은 실린더 내의 흡기 밸브 2개도 각각의 밸브 타이밍을 갖을 때 성능에서 좋아지고 있기 때문이다.This is because, in the engine described above, each valve timing is required according to the driving conditions, and two intake valves in the same cylinder also improve in performance when they have respective valve timings.

또, 배기 밸브 2개도 밸브 타이밍을 각각 변화시켰을 때 배기 소음 저감 효과가 있는데, 현재의 기술로는 각 실린더별 밸브 타이밍을 가변시키는 장치는 있지만 1개의 실린더 내에서 같은 밸브 2개를 각각의 밸브 타이밍을 갖게 조절하지는 못하고 있다.In addition, the two exhaust valves also reduce the exhaust noise when the valve timings are changed. In the current technology, there is a device for varying the valve timing of each cylinder. I can't control it.

상기한 엔진에서 구동 조건에 따라 각각의 밸브 타이밍이 필요하고, 같은 실린더 내의 흡기 밸브 2개도 각각의 밸브 타이밍 변화를 갖을 때 성능에서 좋아지리라고 보고 있지만, 현재는 1개 실린더 내에서 같은 밸브 2개를 각각의 밸브 타이밍을 갖게 조절하지는 못하고 있다.In the engine described above, each valve timing is required according to the driving conditions, and two intake valves in the same cylinder may be improved in performance when they have different valve timing changes. Cannot be adjusted to have each valve timing.

또, 배기 밸브 2개도 밸브 타이밍을 각각 변화시켰을 때 배기 소음 저감 효과가 있는데, 현재의 기술로는 각 실린더별 밸브 타이밍을 가변시키는 장치는 있지만 1개의 실린더 내에서 같은 밸브 2개를 각각의 밸브 타이밍을 갖게 조절하지는 못하고 있다.In addition, the two exhaust valves also reduce the exhaust noise when the valve timings are changed. In the current technology, there is a device for varying the valve timing of each cylinder. I can't control it.

따라서 본 발명은 앞에서 언급한 바와 같은 문제점을 해결하기 위하여 발명된 것으로서, 본 발명의 목적은 1개 실린더 내의 흡기 밸브 혹은 배기 밸브 1쌍중 각각의 밸브 타이밍을 엔진의 구동 조건에 맞춰 가변시킴으로서 출력, 연비, 소음 저감 등이 이루어지게 한 내연기관의 캠 구동장치 및 그 제어 방법을 제공하는데 있다.Accordingly, the present invention has been invented to solve the above-mentioned problems, and an object of the present invention is to vary output and fuel efficiency by varying the valve timing of each pair of intake valves or exhaust valves in one cylinder according to engine driving conditions. The present invention provides a cam drive device for an internal combustion engine and a control method thereof for reducing noise.

도 1은 종래기술에 따른 내연기관의 캠 구동장치를 도시한 도면.1 is a view showing a cam drive of the internal combustion engine according to the prior art.

도 2는 종래기술에 따른 캠 구동을 도시한 그래프.2 is a graph showing a cam drive according to the prior art.

도 3은 본 발명에 따른 캠 구동장치를 도시한 도면.3 is a view showing a cam drive device according to the present invention.

도 4는 도3의 A-A를 도시한 도면.4 shows A-A of FIG. 3;

도 5는 도3의 B-B를 도시한 도면.5 shows B-B of FIG. 3;

도 6은 본 발명에 따른 캠 구동을 도시한 그래프.6 is a graph showing a cam drive according to the present invention.

도 7은 본 발명에 따른 캠 구동장치의 블록도를 도시한 도면.7 is a block diagram of a cam drive device according to the present invention;

이를 실현하기 위한 본 발명은The present invention for realizing this

기 설정된 엔진 구동 조건을 판단하는 전자제어장치의 제어 수단과,A control means of the electronic controller for determining a preset engine driving condition;

상기 전자 제어장치에 의해 오일펌프와 연결된 실린더 헤드의 관로에 오일의 공급을 제어하게 설치된 솔레노이드 밸브의 개폐 수단과,Opening and closing means of the solenoid valve installed to control the supply of oil to the pipeline of the cylinder head connected to the oil pump by the electronic controller;

상기 솔레노이드 밸브를 설치한 관로가 캠샤프트 저널을 거쳐 캠까지 오일의 공급이 이루어지게 캠샤프트에 형성한 오일 관로 공급 수단과,An oil pipe supply means formed on the cam shaft such that the pipe line on which the solenoid valve is installed is supplied with oil to the cam via the cam shaft journal;

상기 오일 관로를 통해 공급된 오일에 의해 캠샤프트에서 가변적으로 회전 작동하게 설치된 가변 캠의 구동 수단을 포함하여 이루어지는 내연기관의 캠 구동장치를 제공하는데 있다.It is to provide a cam drive device of an internal combustion engine comprising a drive means of a variable cam installed to variably rotate the cam shaft by the oil supplied through the oil pipe.

차량의 주행중 각 센서를 통해 엔진의 구동에 상태에 따른 흡기 공기량과 오일량을 판단하며(S1),The intake air amount and oil amount are determined according to the state of driving the engine through each sensor while driving the vehicle (S1),

이에 따라 기 설정된 데이터에 의해 솔레노이드 밸브의 제어하며(S2),Accordingly, the solenoid valve is controlled by the preset data (S2).

흡기 캠의 작동으로 가변되는 엔진의 출력을 차속으로 판단하여(S3) 엔진의 구동을 유지 제어하는 방법을 제공함을 특징으로 하는 내연기관의 캠 구동 제어장치 의 제어 방법을 제공하는데 있다.It is to provide a method of controlling the cam drive control device of an internal combustion engine, characterized in that the engine output that is determined by the operation of the intake cam is determined as the vehicle speed (S3).

본 발명은 주행에 따른 엔진의 구동 상태를 전자 제어장치가 판단하여 차량의 출력이 떨어지고 있으면 흡기 밸브의 열림 시간을 빨리하여 충분한 혼합기가 공급되도록 솔레노이드 밸브를 작동시킨다.According to the present invention, the electronic control apparatus determines the driving state of the engine according to the driving, and when the output of the vehicle is reduced, the opening time of the intake valve is accelerated to operate the solenoid valve to supply a sufficient mixer.

솔레노이드 밸브의 작동으로 오일은 관로를 통해 캠샤프트에 도달하고 캠샤프트에서는 오일 관로를 거쳐 캠샤프트에 마련된 챔버에 공급이 이루어진다.By the operation of the solenoid valve, the oil reaches the camshaft through the conduit, and the camshaft is supplied to the chamber provided in the camshaft via the oil conduit.

이때 오일이 공급되는 측의 반대측 쳄버내의 오일은 공급의 역순으로 리턴되어 리저버 탱크로 복귀한다.At this time, the oil in the chamber opposite to the oil supply side is returned in the reverse order of supply and returns to the reservoir tank.

한편, 챔버 내에 충진된 오일은 캠에 일체로 형성된 리브판을 가압하여 캠을 회전시켜 캠샤프트 상의 또 다른 캠의 회전 주기보다 앞서게 하여 흡기 밸브를 일정시간 조기에 개구하므로서 흡기량을 늘려 출력을 향상할 수 있게 한다.On the other hand, the oil filled in the chamber pressurizes the rib plate integrally formed in the cam to rotate the cam so that it is ahead of the rotation period of another cam on the cam shaft, thereby opening the intake valve at a predetermined time and increasing the intake amount, thereby improving output. To be able.

이하, 본 발명의 바람직한 구성 및 작용을 첨부한 도면에 의거하여 보다 상세하게 설명하면 다음과 같다.Hereinafter, the preferred configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

도3은 본 발명에 따른 캠 구동장치를 도시한 도면이고, 도4는 도3의 A-A를 도시한 도면이다.3 is a view showing a cam drive device according to the present invention, Figure 4 is a view showing A-A of FIG.

도5는 도3의 B-B를 도시한 도면이고, 도6은 본 발명에 따른 캠 구동을 도시한 그래프이다.Fig. 5 is a view showing B-B of Fig. 3, and Fig. 6 is a graph showing a cam drive according to the present invention.

캠 구동장치(20)는 전자 제어장치(22), 솔레노이드 밸브(24), 오일 관로(26), 가변캠(28)으로 구성되어 이루어지고 있다.The cam drive device 20 is composed of an electronic controller 22, a solenoid valve 24, an oil line 26, and a variable cam 28.

전자 제어장치(22)는 미리 설정된 데이터에 의해 엔진 구동 조건중 하나인 에어 흡입량 오일량등을 판단하여 솔레노이드 밸브(24)를 제어하게 하고 있다.The electronic controller 22 determines the air intake amount oil amount, which is one of the engine driving conditions, and the like to control the solenoid valve 24 based on the preset data.

솔레노이드 밸브(24)는 전자 제어장치(22)에 의해 오일펌프(30)와 연결된 실린더 헤드(32)의 오일 관로(26)를 통행 오일의 공급을 제어하게 설치되고 있다.The solenoid valve 24 is installed to control the supply of passage oil through the oil line 26 of the cylinder head 32 connected to the oil pump 30 by the electronic control device 22.

오일 관로(26)는 솔레노이드 밸브(24)에 연결 설치한 제1,2관로(36)(38)가 캠샤프트 저널(40)을 거쳐 가변캠(28)까지 오일의 공급이 이루어지게 캠샤프트(42)에 형성하고 있다.The oil pipeline 26 has a cam shaft such that the first and second pipelines 36 and 38 connected to the solenoid valve 24 are supplied with oil to the variable cam 28 via the cam shaft journal 40. 42).

가변캠(28)은 오일 관로(26)를 통해 공급된 오일에 의해 캠샤프트(42)상에서 가변적으로 회전 작동하게 설치되고 있다.The variable cam 28 is installed to variably rotate on the cam shaft 42 by the oil supplied through the oil line 26.

오일 관로(26)는 솔레노이드 밸브(24)에 연결되면서 저널(40)부까지 연통되게 형성한 제1,2관로(36)(38)와, 이 제1,2관로(36)(38)를 통해 오일의 공급이 이루어지게 저널(40)의 내주면에 해당하는 캠샤프트(42) 외주면에 형성한 제1,2오일홈(44)(46)과, 이 제1,2오일홈(44)(46)에 연결되게 캠샤프트(42) 심부에 제1,2연결 유로(48)(50)와, 이 제1,2연결 유로(48)(50)의 일단이 제1챔버(52)간을 연통시키게 연결되는 제1통공(54)과, 이 제1통공(54)으로부터 어긋나게 형성되어 제2챔버(56)간을 연통시키게 연결되는 제2통공(58)을 형성하여 이루어지고 있다.The oil pipeline 26 is connected to the solenoid valve 24 and the first and second pipelines 36 and 38 formed in communication with the journal 40, and the first and second pipelines 36 and 38, respectively. First and second oil grooves 44 and 46 formed on the outer circumferential surface of the cam shaft 42 corresponding to the inner circumferential surface of the journal 40 to supply oil through the first and second oil grooves 44 ( The first and second connection passages 48 and 50 at the core portion of the camshaft 42 and one end of the first and second connection passages 48 and 50 are connected between the first chamber 52 so as to be connected to the cam shaft 42. The first through hole 54 connected to communicate with each other, and the second through hole 58 which is formed to be shifted from the first through hole 54 and connected to communicate between the second chambers 56 are formed.

가변캠(28)은 캠의 내주면에 오일압을 받게 돌출 형성한 제1,2리브(60)(62)와, 이 제1,2리브(60)(62)에 의해 분할되어 캠샤프트(42)에 대칭으로 마련된 제1,2챔버(52)(56)를 형성하여 이루어지고 있다.The variable cam 28 is divided by the first and second ribs 60 and 62 protruding from the oil pressure on the inner circumferential surface of the cam and the first and second ribs 60 and 62 and the cam shaft 42. ) Are formed by forming first and second chambers 52 and 56 provided symmetrically.

솔레노이드 밸브(24)는 하우징(64)에 설치된 솔레노이드부(66)와, 이 솔레노이드부(66)의 일측에 전,후진 이동하게 조립된 스풀 밸브(68)와, 이 스풀 밸브(68)의 이동으로 오일의 공급과 배출이 가능하게 하우징(64)에 제1,2포트(70)(72)를 형성하여 이루어지고 있다.The solenoid valve 24 includes a solenoid portion 66 provided in the housing 64, a spool valve 68 assembled to move forward and backward on one side of the solenoid portion 66, and the spool valve 68 moves. Thus, the first and second ports 70 and 72 are formed in the housing 64 so that the oil can be supplied and discharged.

상기한 캠 구동장치(20)는 흡기 밸브를 구동하는 흡기 캠에 적용되고 있으나, 여기에 한정되지 않고 배기 밸브를 구동하는 배기 캠에도 적용하여 배기 소음 저감을 이룰 수 있다.The cam driving device 20 is applied to the intake cam for driving the intake valve, but is not limited thereto, and can also be applied to the exhaust cam for driving the exhaust valve to reduce exhaust noise.

상기한 바와 같이 이루어지는 본 발명의 작용은 주행중 엔진의 구동 상태를 전자 제어장치(22)가 흡입 공기량 등을 판단(S1)하여 차량의 출력이 떨어지고 있으면 솔레노이드 밸브(24)를 제어하여(S2) 제1포트(70)를 개구시켜 제1관로(36)와, 캠샤프트(42)의 오일홈(44), 여기에 연결된 제1연결 유로(48)와 제1통공(54)을 거쳐 제1챔버(52)에 오일을 충진시키게 된다.The operation of the present invention as described above is performed by the electronic controller 22 determines the amount of intake air, etc. (S1) of the driving state of the engine while driving, and controls the solenoid valve 24 if the output of the vehicle is falling (S2). The first chamber is opened by opening the first port 70, the oil groove 44 of the cam shaft 42, the first connecting flow path 48 and the first through hole 54 connected thereto. (52) is filled with oil.

이렇게 제1챔버(52)에 오일의 충진이 이루어지면 제1리브(60)는 오일 압력을 받게 되면서 가변캠(28)을 회전시켜 흡기 밸브의 열림 시간을 또 다른 캠(61)의 캠 리프트 곡선(L2)보다 캠 리프트 곡선(L1)처럼 빨리하므로서 충분한 혼합기가 공급되게 하여 출력을 증대시키고 전자 제어장치(22)는 차속을 통해 결과를 감지한다.(S3).When the oil is filled in the first chamber 52 as described above, the first rib 60 receives the oil pressure and rotates the variable cam 28 so that the opening time of the intake valve is changed by the cam lift curve of the other cam 61. As much as the cam lift curve L1 than L2, sufficient mixer is supplied to increase the output and the electronic controller 22 senses the result through the vehicle speed (S3).

즉, 제1챔버(52)내에 충진된 오일은 가변캠(28)에 일체로 형성된 제1리브(60)를 가압하여 가변캠(28)을 회전시키게 됨에 따라 캠샤프트(42)상의 또, 다른 캠의 회전 주기보다 앞서게 하여 흡기 밸브를 일정시간 조기에 개구하므로서 흡기량을 늘려 출력을 향상할 수 있게 한다.That is, the oil filled in the first chamber 52 pressurizes the first rib 60 formed integrally with the variable cam 28 to rotate the variable cam 28. It is possible to improve the output by increasing the amount of intake air by opening the intake valve early in a predetermined time by advancing the rotation period of the cam.

상기한 바와 같이 엔진의 구동이 이루어짐을 전자 제어장치(22)가 판단하면서 흡기 캠을 제어하게 된다.As described above, the electronic controller 22 determines that the engine is driven, thereby controlling the intake cam.

그리고 상기한 바와 같이 제1챔버(52)에 오일이 충진되면 제2챔버(56)의 오일은 제2통공(58), 제2연결 유로(50), 제2관로(38))를 통해 솔레노이드 밸브(24))의 제2포트(72)를 통해 리저버 탱크(74)로 순환되게 한다.As described above, when the oil is filled in the first chamber 52, the oil in the second chamber 56 passes through the second through hole 58, the second connecting flow path 50, and the second pipe line 38. It is circulated to the reservoir tank 74 through the second port 72 of the valve (24).

다시말해 가변캠을 회전시켜 캠샤프트 상의 또 다른 캠의 회전 주기보다 앞서게 하여 흡기 밸브를 일정시간 조기에 개구하므로서 흡기량을 늘려 출력을 향상할 수 있게 한다.In other words, the variable cam is rotated so that it is ahead of the rotation period of another cam on the cam shaft, so that the intake valve is opened early for a predetermined time, thereby increasing the intake amount, thereby improving output.

상기한 캠 구동장치를 배기 캠에 적용하였을 경우에는 전자 제어장치가 유해 배기가스 및 소음, 진동, 강성 저하가 나타나고 있다고 판단되면, 배기 캠을 상기 일례와 같이 제어하여 완전연소를 도모할 수 있게 한다.When the cam drive device is applied to the exhaust cam, if the electronic control device determines that harmful exhaust gas, noise, vibration, and stiffness are exhibited, the exhaust cam is controlled as in the above example to achieve complete combustion. .

상기한 배기 캠의 제어 경우는 배기 캠이냐 흡기 캠이냐만 다른 뿐이어서 상세한 설명은 생략한다.In the case of the control of the exhaust cam, only the exhaust cam or the intake cam is different, and detailed description thereof is omitted.

설정된 엔진의 구동 조건시 밸브 타이밍 주기를 가변적으로 캠을 제어 구동시켜 출력 향상 또는 유해 배기가스, 소음, 진동의 저감과, 강성 향상 등을 도모하게 된다.The cam is variably controlled to drive the valve timing cycle at the set driving conditions of the engine to improve output, reduce harmful exhaust gas, noise, vibration, and improve rigidity.

엔진의 정숙성 및 승차감이 향상된다.Engine quietness and ride comfort are improved.

Claims (6)

기 설정된 엔진 구동 조건을 판단하는 전자제어장치의 제어 수단과,A control means of the electronic controller for determining a preset engine driving condition; 상기 전자 제어장치에 의해 오일펌프와 연결된 실린더 헤드의 관로에 오일의 공급을 제어하게 설치된 솔레노이드 밸브의 개폐 수단과,Opening and closing means of the solenoid valve installed to control the supply of oil to the pipeline of the cylinder head connected to the oil pump by the electronic controller; 상기 솔레노이드 밸브를 설치한 관로가 캠샤프트 저널을 거쳐 캠까지 오일의 공급이 이루어지게 캠샤프트에 형성한 오일 관로 공급 수단과,An oil pipe supply means formed on the cam shaft such that the pipe line on which the solenoid valve is installed is supplied with oil to the cam via the cam shaft journal; 상기 오일 관로를 통해 공급된 오일에 의해 캠샤프트에서 가변적으로 회전 작동하게 설치된 가변캠의 구동 수단을 포함하여 이루어짐을 특징으로 하는 내연기관의 캠 구동장치.Cam drive device of the internal combustion engine, characterized in that it comprises a drive means of a variable cam installed to variably rotate the cam shaft by the oil supplied through the oil pipe. 청구항 1에 있어서, 오일 관로는 솔레노이드 밸브에 연결되면서 저널부까지 연통되게 형성한 제1,2관로와, 이 제1,2관로를 통해 오일의 공급이 이루어지게 저널의 내주면에 해당하는 캠샤프트 외주면에 형성한 제1,2오일홈과, 이 제1,2오일홈에 연결되게 캠샤프트 심부에 형성한 제1,2연결 유로와, 이 제1,2연결 유로의 일단이 제1챔버간을 연통시키게 연결되는 제1통공과, 이 제1통공으로부터 어긋나게 형성되어 제2챔버간을 연통시키게 연결되는 제2통공을 형성하여 이루어지는 내연기관의 캠 구동장치.The circumferential surface of the camshaft corresponding to the inner circumferential surface of the journal to supply oil through the first and second pipes, wherein the oil pipe is connected to the solenoid valve and communicated to the journal. First and second oil grooves formed on the first shaft, the first and second connection flow paths formed in the core of the camshaft so as to be connected to the first and second oil grooves, and one end of the first and second connection flow paths is formed between the first chambers. A cam drive device for an internal combustion engine, comprising: a first through hole connected to communicate with each other; and a second through hole connected to communicate between the second chambers so as to be displaced from the first through hole. 청구항 1에 있어서, 가변캠은 캠의 내주면에 오일압을 받게 돌출 형성한제1,2리브와, 이 제1,2리브에 의해 분할되어 캠샤프트에 대칭으로 마련된 제1,2챔버를 형성하여 이루어지는 내연기관의 캠 구동장치.The cam according to claim 1, wherein the variable cam has a first and second ribs protruding from the oil pressure on the inner circumferential surface of the cam, and first and second chambers divided by the first and second ribs and symmetrically provided on the cam shaft. Cam drive device of the internal combustion engine. 청구항 1에 있어서, 솔레노이드 밸브는 하우징에 설치된 솔레노이드부와, 이 솔레노이드부의 일측에 전,후진 이동하게 조립된 스풀 밸브와, 이 스풀 밸브의 이동으로 오일의 공급과 배출이 가능하게 하우징에 포트를 형성하여 이루어지는 내연기관의 캠 구동장치.The solenoid valve of claim 1, wherein the solenoid valve includes a solenoid portion installed in the housing, a spool valve assembled on one side of the solenoid portion to move forward and backward, and a port is formed in the housing to enable oil supply and discharge by moving the spool valve. Cam drive device of the internal combustion engine. 청구항 1에 있어서, 가변캠을 배기 소음, 진동을 저감하기 위하여 배기 밸브를 구동하는 배기캠으로 적용하여 이루어지는 내연기관의 캠 구동장치.The cam drive device of an internal combustion engine according to claim 1, wherein the variable cam is applied to an exhaust cam for driving an exhaust valve to reduce exhaust noise and vibration. 차량의 주행중 각센서를 통해 엔진의 구동에 상태에 따른 흡기 공기량과 오일량을 판단하며(S1),Determine the intake air amount and oil amount according to the state of driving the engine through each sensor while driving the vehicle (S1), 이에 따라 기 설정된 데이터에 의해 솔레노이드 밸브의 제어하며(S2),Accordingly, the solenoid valve is controlled by the preset data (S2). 흡기 캠의 작동으로 가변되는 엔진의 출력을 차속으로 판단하여(S3) 엔진의 구동을 유지 제어하는 방법을 제공함을 특징으로 하는 내연기관의 캠 구동장치의 제어 방법.A method of controlling a cam drive device of an internal combustion engine, characterized by providing a method of maintaining and controlling driving of an engine by determining an output of an engine that is variable by operation of an intake cam (S3).
KR1019990063665A 1999-12-28 1999-12-28 Cam drive system and method for internal combustion engine KR20010061177A (en)

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WO2010096432A2 (en) * 2009-02-17 2010-08-26 Cummins Inc. Variable valve actuation apparatus, system, and method
WO2010096437A2 (en) * 2009-02-17 2010-08-26 Cummins Inc. Variable valve actuation apparatus, system, and method

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KR19980059897U (en) * 1997-03-06 1998-11-05 김영귀 Variable valve timing system

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Publication number Priority date Publication date Assignee Title
WO2010096432A2 (en) * 2009-02-17 2010-08-26 Cummins Inc. Variable valve actuation apparatus, system, and method
WO2010096437A2 (en) * 2009-02-17 2010-08-26 Cummins Inc. Variable valve actuation apparatus, system, and method
WO2010096437A3 (en) * 2009-02-17 2010-10-21 Cummins Inc. Variable valve actuation apparatus, system, and method
WO2010096432A3 (en) * 2009-02-17 2010-11-04 Cummins Inc. Variable valve actuation apparatus, system, and method
US8667939B2 (en) 2009-02-17 2014-03-11 Cummins Inc. Variable valve actuation apparatus, system and method
US9222375B2 (en) 2009-02-17 2015-12-29 Cummins Inc. Variable valve actuation apparatus, system, and method

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