KR100218718B1 - Multi cylinder engine with structure for decreasingof exhaust gases - Google Patents

Multi cylinder engine with structure for decreasingof exhaust gases Download PDF

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Publication number
KR100218718B1
KR100218718B1 KR1019950056167A KR19950056167A KR100218718B1 KR 100218718 B1 KR100218718 B1 KR 100218718B1 KR 1019950056167 A KR1019950056167 A KR 1019950056167A KR 19950056167 A KR19950056167 A KR 19950056167A KR 100218718 B1 KR100218718 B1 KR 100218718B1
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South Korea
Prior art keywords
cylinder
exhaust
intake
valve
opened
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KR1019950056167A
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Korean (ko)
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KR970044595A (en
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한봉훈
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정몽규
현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

본원 발명의 목적은 배기되는 연소가스의 일부를 타 실린더의 흡기과정 중에 흡입 혼합하여 재연소 시키므로서 배기가스를 저감시키게 되는 다기통 실린더 엔진을 제공하는데 있다.An object of the present invention is to provide a multi-cylinder cylinder engine that reduces the exhaust gas by inhaling and re-burning a portion of the exhaust gas to be exhausted during the intake process of the other cylinder.

상기한 목적을 달성하기 위한 본원 발명의 구성은 다기통 실린더의 4사이클 엔진에 있어서, 상기 다기통 실린더중 배기밸브가 개방되는 순간에 대응하여 흡기밸브가 열리게 되는 양측 실린더의 배기포트와 흡기포트를 연결통로에 의해 연통시킨 후 상기 각각의 연결통로를 개폐하는 솔레노이드 밸브를 마련한 것을 특징으로 한다.In the four-cycle engine of the multi-cylinder cylinder, the configuration of the present invention for achieving the above object, the exhaust port and the intake port of both cylinders in which the intake valve is opened corresponding to the moment when the exhaust valve of the multi-cylinder cylinder is opened; It characterized in that the solenoid valve for opening and closing the respective connecting passages after communicating by the connecting passages.

Description

배기가스 감소 구조를 갖는 다기통 실린더 엔진.Multi-cylinder cylinder engine with exhaust gas reduction structure.

제1도는 본 발명의 배기가스 감소 구조를 갖는 다기통 실린더 엔진을 나타내는 평면에서의 개략도.1 is a schematic view in plan view of a multi-cylinder cylinder engine having an exhaust gas reducing structure of the present invention.

제2도는 동상 엔진의 일부를 나타내는 측면도.2 is a side view showing a part of an in-phase engine.

제3도는 제어 블록도.3 is a control block diagram.

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

1, 2, 3, 4 : 실린더 5, 6, 7, 8 : 흡기밸브1, 2, 3, 4: Cylinder 5, 6, 7, 8: Intake valve

9, 10, 11, 12 : 배기밸브 13, 14, 15, 16 : 흡기포트9, 10, 11, 12: exhaust valve 13, 14, 15, 16: intake port

17, 18, 19, 20 : 배기포트 21, 22, 23, 24 : 연결통로17, 18, 19, 20: exhaust port 21, 22, 23, 24: connecting passage

25 : 전자제어부 26, 27, 28, 29 : 솔레노이드밸브25: electronic control unit 26, 27, 28, 29: solenoid valve

30, 31 : 피스톤30, 31: Piston

[산업상 이용분야][Industrial use]

본원 발명은 흡기밸브가 열리는 실린더와 연계하여 배기밸브가 동시에 열리게 되는 실린더와의 흡배기 포트 사이를 연통시켜 배기가스의 일부를 재연소시키므로 서 배기가스를 감소시키게 되는 다기통 실린더 엔진에 관한 것이다.The present invention relates to a multi-cylinder cylinder engine that reduces exhaust gas by recombusting a part of the exhaust gas by communicating between the intake and exhaust ports of the cylinder in which the exhaust valve is opened simultaneously with the cylinder in which the intake valve is opened.

[종래 기술][Prior art]

4사이클 엔진에서는 각 실린더의 4행정 중 동력행정은 1행정뿐이기 때문에 다 실린더 엔진에서는 회전을 원활하게 하기 위해서 크랭크축이 2회전하는 동안에 각 실린더의 연소 순서를 정하게 되며 4기통 실린더 엔진의 크랭크핀은 예외없이 180˚ 2방향이기 때문에 직렬형에서는 1번 실린더가 상사점에 있을 때 4번 실린더도 상사 점에 있으며 2번과 3번 실린더는 하사점에 있게 된다.In four-cycle engines, the power stroke is only one stroke in each of the four strokes of each cylinder.In the multi-cylinder engine, the combustion sequence of each cylinder is determined during two revolutions of the crankshaft to facilitate rotation. Is in 180 ° 2 direction without exception, in series, cylinder 1 is at top dead center when cylinder 1 is at top dead center, and cylinders 2 and 3 are at bottom dead center.

이에 따라 점화 순서는 1→3→4→2 또는 1→2→4→3 의 2종류가 있게 된다.Thereby, there are two kinds of ignition order: 1 → 3 → 4 → 2 or 1 → 2 → 4 → 3.

[종래 기술의 문제점][Problems with Prior Art]

그러나 종래의 경우 각 실린더들이 각각 별개로 되어 있어 연소가스는 각 실린더의 배기 행정 중에 개방된 배기 포트를 통해 전량 배출되어지기 때문에 완전 연소되지 아니한 가스의 배출에 의해 심각한 공해 문제가 유발되고 있다.However, in the conventional case, since each cylinder is separate from each other, the combustion gas is discharged entirely through the open exhaust port during the exhaust stroke of each cylinder, thereby causing serious pollution problem due to the discharge of gas that is not completely burned.

한편 동일 실린더의 흡·배기 밸브가 함께 열려있도록 한 오버랩 구간을 설정하므로서 상기한 문제점을 해결하고자 시도하고 있다.On the other hand, it attempts to solve the above problems by setting an overlap section in which the intake / exhaust valves of the same cylinder are opened together.

그러나 오버랩을 크게하여 연소가스의 일부를 흡입 혼합기 중에 혼합시켜서 연소속도를 완만하게 하면 최고연소온도가 낮아져 NOx(질화산화물)을 저감시킬 수 있으나 저속저부하 상태에서는 혼합기의 블로바이에 의해 HC(탄화수소)가 증가함과 동시에 출력저하를 가져오므로 하나의 실린더내에서의 오버랩의 확장은 한계가 있으며 특히 흡기와 배기가스가 고르게 혼합되지 아니하므로서 연소전파가 불균일하다는 문제점이 지적되고 있다.However, if a portion of the combustion gas is mixed in the intake mixer by increasing the overlap, and the combustion speed is slowed, the maximum combustion temperature can be lowered and NOx (nitride oxide) can be reduced. As the) increases and output decreases, the extension of the overlap in one cylinder is limited, and in particular, the combustion propagation is uneven because the intake and exhaust gases are not evenly mixed.

[발명이 해결하고자 하는 과제][Problem to Solve Invention]

이에 본원 발명은 상기한 문제점을 감안하여 제안한 것으로서 그의 목적으로 하는 바는 배기되는 연소가스의 일부를 타 실린더의 흡입혼합기중에 고르게 혼합하여 재연소시키므로서 배기가스를 저감시키게 되는 다기통 실린더 엔진을 제공하는데 있다.Accordingly, the present invention has been proposed in view of the above problems, and its object is to provide a multi-cylinder cylinder engine which reduces exhaust gas by uniformly mixing and reburning a part of the exhaust gas to be exhausted in an intake mixer of another cylinder. It is.

[과제를 해결하기 위한 수단][Means for solving the problem]

상기한 목적을 달성하기 위한 본원 발명의 구성은 다기통 실린더의 4사이클 엔진에 있어서, 상기 다기통 실린더중 배기밸브가 개방되는 순간에 대응하여 흡기밸브가 열리게 되는 양측 실린더의 배기포트와 흡기포트를 연결통로에 의해 연통시킨후 상기 각각의 연결통로를 개폐하는 솔레노이드밸브를 마련한 것을 특징으로 한다.In the four-cycle engine of the multi-cylinder cylinder, the configuration of the present invention for achieving the above object, the exhaust port and the intake port of both cylinders in which the intake valve is opened corresponding to the moment when the exhaust valve of the multi-cylinder cylinder is opened; It characterized in that the solenoid valve for opening and closing the respective connecting passage after the communication by the connecting passage.

[실시예]EXAMPLE

이하 본 발명의 실시예를 첨부한 도면을 참조하여 설명한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

제1도는 본 발명에 의한 다기통 실린더 엔진의 일실시예를 나타내는 평면에서의 개략도 이며 제2도는 그의 일부를 나타내는 측면도이고 제3도는 제어블록도이다.1 is a schematic view in plan view showing one embodiment of a multi-cylinder cylinder engine according to the present invention, FIG. 2 is a side view showing a part thereof, and FIG. 3 is a control block diagram.

도면중 부호 1,2,3,4는 각기 제1 내지 제4실린더를 나타내며 도시된 상태로는 직렬형의 4기통이나 본 발명이 직렬형 4기통에 한정되는 것은 아니며 수평대향형, 6기통·8기통 및 OHC밸브등 어느 것이나 동일하게 적용되어진다.Reference numerals 1,2, 3, and 4 in the drawings indicate the first to fourth cylinders, respectively, and in the illustrated state, the four cylinders of the serial type or the present invention are not limited to the four cylinders of the serial type. Eight cylinders and OHC valves are equally applicable.

본 발명의 실시예는 점화순서 1→3→4→2를 갖는 4기통 직렬엔진을 예로든 것으로서 제1실린더(1)의 배기밸브(9)가 개방될 때 제2실린더(2)의 흡기밸브(6)가 열리며, 제3실린더(3)의 배기밸브(11)의 개방시는 제1실린더(1)의 흡기밸브(5)가, 제4실린더(4)의 배기밸브(12)가 개방 시에는 제3실린더(3)의 흡기밸브(7) 가, 제2실린더(2)의 배기밸브(10)가 개방시에는 제4실린더(4)의 흡기밸브(8)가 열리도록 대응되어진다.The embodiment of the present invention exemplifies a four-cylinder in-line engine having an ignition sequence 1 → 3 → 4 → 2, and the intake valve of the second cylinder 2 when the exhaust valve 9 of the first cylinder 1 is opened. (6) is opened, the intake valve (5) of the first cylinder (1), the exhaust valve 12 of the fourth cylinder (4) at the time of opening the exhaust valve (11) of the third cylinder (3) When opening, the intake valve 7 of the third cylinder 3 corresponds to the intake valve 8 of the fourth cylinder 4 when the exhaust valve 10 of the second cylinder 2 opens. Lose.

상기 제1실린더(1)의 흡기포트(13)는 제3실린더(3)의 배기포트(19)와, 제2실린더(3)의 흡기포트(14)는 제1실린더(1)의 배기포트(13)와, 제2실린더(2)의 배기포트(18)는 제4실린더(4)의 흡기포트와, 제3실린더(3)의 흡기포트(15)는 제4실린더(4)의 배기포트(20)와 각기 연결통로(21)(22)(23)(24)에 의해 상호 대향하는 흡·배기포트가 연통되어 있다.The intake port 13 of the first cylinder 1 is an exhaust port 19 of the third cylinder 3 and the intake port 14 of the second cylinder 3 is an exhaust port of the first cylinder 1. 13, the exhaust port 18 of the second cylinder 2 is an intake port of the fourth cylinder 4, and the intake port 15 of the third cylinder 3 is the exhaust of the fourth cylinder 4. The ports 20 and the connecting passages 21, 22, 23, and 24 respectively communicate with each other by the intake / exhaust ports.

상기 각각의 연결통로(21-24)의 도중에는 전자제어부(25)의 신호인가에 따라 상기 연결통로(21,22,23,24)의 개폐를 행하는 솔레노이드 밸브(26)(27)(28)(29)가 설치되어 있다.The solenoid valves 26, 27, 28 (28) which open and close the connection passages 21, 22, 23, and 24 according to the application of a signal from the electronic control unit 25 in the middle of each connection passage 21-24 ( 29) is installed.

본 발명의 작동을 제2도를 참조하여 설명하면 다음과 같다.The operation of the present invention will be described with reference to FIG.

1→3→4→2의 점화순서를 갖는 4기통 직렬형 엔진의 경우 제1실린더(1)가 배기 행정중일 때 제2실린더(2)는 흡기행정이 된다.In the case of a four-cylinder in-line engine having an ignition sequence of 1 → 3 → 4 → 2, the second cylinder 2 becomes an intake stroke when the first cylinder 1 is in the exhaust stroke.

이에 따라 제1실린더(1)의 배기밸브(9)가 개방되고 제1피스톤(30)이 상승함과 동시에 제2실린더(2)의 흡기밸브(6)가 개방되고 제2피스톤(31)은 하강하게 된다.Accordingly, the exhaust valve 9 of the first cylinder 1 is opened, the first piston 30 is raised, and the intake valve 6 of the second cylinder 2 is opened, and the second piston 31 is opened. Will descend.

양측 피스톤(30)(31)이 적절한 위치까지 승·하강하게 되면 전자제어부(25)는 솔레노이드 밸브(27)를 작동시켜 연결통로(22)를 개방하게 된다.When both pistons 30 and 31 are raised and lowered to an appropriate position, the electronic control unit 25 operates the solenoid valve 27 to open the connection passage 22.

연결통로(22)가 개방되면 배기포트(17)로 배출되는 배기가스의 일부가 연결통로(22)를 통해 흡기포트(14)로 유입되어 흡기와 혼합되어지게 되며 혼합된 가스는 제2실린더(2)내로 흡입되어지게 된다.When the connection passage 22 is opened, a part of the exhaust gas discharged to the exhaust port 17 is introduced into the intake port 14 through the connection passage 22 and mixed with the intake air. 2) It will be sucked into.

제1피스톤(30)이 상사점에 도달하여 하강으로 바뀌면 배기밸브(9)는 닫히고 흡기밸브(5)는 열리게되고 제2실린더(2)는 압축과정이 되며 제3실린더(3)는 배기밸브(7)가 열리게 되고 제4실린더(4)는 팽창행정이 된다.When the first piston 30 reaches the top dead center and changes to the descending position, the exhaust valve 9 is closed, the intake valve 5 is opened, the second cylinder 2 is compressed, and the third cylinder 3 is the exhaust valve. (7) is opened and the fourth cylinder 4 becomes an expansion stroke.

이에 따라 전자제어부(25)는 연결통로(22)를 차단하고 제1실린더(1)의 흡기포트(13)와 제3실린더(3)의 배기포트(19)를 연결하는 연결통로(21)의 솔레노이드 밸브(26)를 작동시켜 개방하므로서 이번에는 제3실린더(3)로부터 배기되는 가스의 일부를 흡기포트(13)를 통해 제1실린더(1)내로 혼합시켜 흡입하게 되며 이와같은 과정이 배기와 흡기가 대응되는 실린더 사이에서 순차적으로 일어나게 된다.Accordingly, the electronic controller 25 blocks the connection passage 22 and connects the intake port 13 of the first cylinder 1 with the exhaust port 19 of the third cylinder 3. By operating and opening the solenoid valve 26, this time a part of the gas exhausted from the third cylinder 3 is mixed into the first cylinder 1 through the intake port 13 and sucked. Intake occurs sequentially between corresponding cylinders.

[효과][effect]

이상과 같은 본원 발명에 의하면 타측 실린더에서 배기되는 가스를 흡입포트를 통해 흡입 혼합하여 연소하게 되므로서 동일 실린더 내에서의 오버랩 현상을 서로 다른 실린더 사이에서 극대화시켜 구현하는 것이 가능하며 이에 따라 HC 및 NOx 등의 배기가스를 저감시키고 흡배기 효율을 극대화시키게 되는 효과가 있다.According to the present invention as described above it is possible to realize by maximizing the overlap phenomenon in the same cylinder between the different cylinders by the combustion of the gas exhausted from the other cylinder through the suction port to be burned. There is an effect to reduce the exhaust gas, and to maximize the intake and exhaust efficiency.

Claims (2)

다기통 실린더의 4사이클 엔진에 있어서, 상기 다기통 실린더 중 배기밸브가 개방되는 순간에 대응하여 흡기밸브가 열리게 되는 양측 실린더의 배기포트와 흡기포트를 연결통로에 의해 연통 시킨 후 상기 각각의 연결통로를 개폐하는 솔레노이드 밸브를 마련한 것을 특징으로 하는 배기가스 감소 구조를 갖는 다기통 실린더 엔진.In a four-cylinder engine of a multi-cylinder cylinder, each of the connecting passages is formed by connecting the exhaust port and the intake port of both cylinders in which the intake valve opens to correspond to the moment when the exhaust valve is opened. A multi-cylinder cylinder engine having an exhaust gas reduction structure, comprising a solenoid valve for opening and closing the valve. 제1항에 있어서, 상기 각각의 솔레노이드 밸브는 연결통로에 의해 연결된 양측 실린더의 흡기밸브와 배기밸브가 동시에 열려있는 상태에서 상기 연결통로를 개방하도록 작동되어지는 것임을 특징으로 하는 배기가스 감소 구조를 갖는 다기통 실린더 엔진.The exhaust gas reducing structure according to claim 1, wherein each of the solenoid valves is operated to open the connection passages while the intake valves and the exhaust valves of both cylinders connected by the connection passages are open at the same time. Multi-cylinder cylinder engine.
KR1019950056167A 1995-12-26 1995-12-26 Multi cylinder engine with structure for decreasingof exhaust gases KR100218718B1 (en)

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KR101394047B1 (en) * 2012-12-06 2014-05-12 현대자동차 주식회사 Variable cycle engine
KR20180033716A (en) * 2016-09-26 2018-04-04 현대자동차주식회사 Lean-rich sequential combustion engine
KR101836249B1 (en) 2015-06-04 2018-04-19 현대자동차 주식회사 Exhaust gas recirculation system with paired cylinders

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KR100475809B1 (en) * 2001-12-14 2005-03-10 현대자동차주식회사 Swirl apparatus in cylinder

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Publication number Priority date Publication date Assignee Title
KR101394047B1 (en) * 2012-12-06 2014-05-12 현대자동차 주식회사 Variable cycle engine
KR101836249B1 (en) 2015-06-04 2018-04-19 현대자동차 주식회사 Exhaust gas recirculation system with paired cylinders
KR20180033716A (en) * 2016-09-26 2018-04-04 현대자동차주식회사 Lean-rich sequential combustion engine
KR102463443B1 (en) * 2016-09-26 2022-11-04 현대자동차주식회사 Lean-rich sequential combustion engine

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