KR20090064227A - Combustion chamber structure of engine for heavy duty vehicle - Google Patents

Combustion chamber structure of engine for heavy duty vehicle Download PDF

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Publication number
KR20090064227A
KR20090064227A KR1020070131808A KR20070131808A KR20090064227A KR 20090064227 A KR20090064227 A KR 20090064227A KR 1020070131808 A KR1020070131808 A KR 1020070131808A KR 20070131808 A KR20070131808 A KR 20070131808A KR 20090064227 A KR20090064227 A KR 20090064227A
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combustion chamber
engine
cross
large vehicle
exhaust gas
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KR1020070131808A
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Korean (ko)
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류명석
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현대자동차주식회사
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Priority to KR1020070131808A priority Critical patent/KR20090064227A/en
Publication of KR20090064227A publication Critical patent/KR20090064227A/en

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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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/43—Engines
    • B60Y2400/432—Diesel Engines
    • 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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

A combustion chamber structure of an engine for a large vehicle is provided to discharge exhaust gas at the level which enables to satisfy the exhaust gas regulation without processing the exhaust gas discharged from an engine by a separate post-processing device, and to secure the fuel consumption at the appropriate level. A combustion chamber structure of an engine for a large vehicle is formed in the shape of a bowl on the upper part of a piston(1), wherein the cross-sectional shape of a combustion chamber(3) is formed in the retreated structure by forming at least two or more bends(5) from the upper part to the lower part on the edge, and the edge of the cross-sectional shape of the combustion chamber includes a first projection(7) inclined from the upper part to the lower part and projected convexly to the inside of the combustion chamber, and a second projection(9) extended downward to the first projection and projected toward the inside of the combustion chamber. The cross-sectional shape of the combustion chamber is formed by forming the central part(11) to be convexly curved upwardly and connecting the central part and the second projection with a smooth arc-shaped depression(13).

Description

대형차량용 엔진의 연소실 구조{Combustion Chamber Structure of Engine for Heavy Duty Vehicle}Combustion Chamber Structure of Engine for Heavy Duty Vehicle

본 발명은 대형차량용 엔진의 연소실 구조에 관한 것으로서, 보다 상세하게는 큰 부하를 받는 대형 디젤엔진의 피스톤 상면에 형성되는 연소실의 형상에 관한 기술이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion chamber structure of a large vehicle engine, and more particularly, to a shape of a combustion chamber formed on an upper surface of a piston of a large diesel engine subjected to a large load.

도 1은 종래의 대형차량용 엔진의 연소실 구조를 도시한 것으로서, 피스톤(500)의 종단면 상측을 표현하고 있다.FIG. 1 illustrates a combustion chamber structure of a conventional engine for a large vehicle, and represents a vertical cross section of the piston 500.

상기 연소실(502)은 피스톤(500)의 상측면에 패인 보울 형상의 공간으로 이루어지는데, 그 단면의 특징은 연소실(502) 단면의 일측을 수직방향으로 볼 때 대체로 한번의 S자형 굴곡(504)을 이루면서 상기 보울이 형성되는 구조이다.The combustion chamber 502 consists of a bowl-shaped space that is recessed on the upper side of the piston 500. The cross section is characterized by a single S-shaped bend 504 when one side of the cross section of the combustion chamber 502 is viewed vertically. The bowl is formed while forming.

연료는 상기 연소실(502)로 분사되어 악축착화됨으로써 폭발행정을 이루어 동력을 발생시키게 되는데, 최근 강화되고 있는 배기가스규제를 충족시키기 위해서는 상기 연소실(502)로부터 배출되는 배기가스를 후처리 할 후처리 장치가 필요하다.Fuel is injected into the combustion chamber 502 and condensed to generate an explosive stroke to generate power. In order to satisfy the recently tightened exhaust gas regulation, the exhaust gas discharged from the combustion chamber 502 is post-processed. A device is needed.

그러나, 상기한 바와 같은 후처리 장치는 차량의 비용을 증가시키는 문제점 이 있으므로, 연소실(502) 형상의 최적화를 통해 별도의 후처리 장치 없이도, 배기가스규제를 충족할 수 있는 수준의 배기가스를 배출하며, 연비도 적절한 수준으로 확보할 수 있도록 할 필요성이 매우 크게 대두되고 있다. However, since the after-treatment device as described above has a problem of increasing the cost of the vehicle, by optimizing the shape of the combustion chamber 502, even without a separate after-treatment device, exhaust gas of a level that can satisfy the exhaust gas regulation is discharged. In addition, there is a great need for ensuring adequate fuel economy.

본 발명은 상기한 바와 같은 필요성에 따라 안출된 것으로서, 엔진에서 배출되는 배기가스를 별도의 후처리 장치에 의해 처리하지 않고도, 배기가스규제를 충족할 수 있는 수준의 배기가스를 배출하며, 연비도 적절한 수준으로 확보할 수 있도록 한 대형차량용 엔진의 연소실 구조를 제공함에 그 목적이 있다.The present invention has been made in accordance with the necessity as described above, without exhaust gas exhausted from the engine by a separate after-treatment device, the exhaust gas to meet the exhaust gas regulation, and the fuel efficiency The purpose is to provide a combustion chamber structure for a large vehicle engine that can be secured at an appropriate level.

상기한 바와 같은 목적을 달성하기 위한 본 발명 대형차량용 엔진의 연소실 구조는 The combustion chamber structure of the engine for a large vehicle of the present invention for achieving the above object is

피스톤의 상측면에 보울의 형상으로 형성되는 대형차량용 엔진의 연소실 구조에 있어서,In the combustion chamber structure of an engine for a large vehicle formed in the shape of a bowl on the upper side of the piston,

상기 연소실의 단면형상은 가장자리 부위가 상측으로부터 하측으로 적어도 2번 이상의 굴곡을 형성하면서 함몰되는 구조로 이루어진 것을 특징으로 한다.The cross-sectional shape of the combustion chamber is characterized in that the edge portion is made of a structure that is recessed while forming at least two bends from the upper side to the lower side.

상기 연소실 단면형상의 가장자리 부위는 상측으로부터 하측으로 경사지면서 볼록하게 연소실 내측으로 돌출되는 제1돌출부와;The edge portion of the cross section of the combustion chamber may include: a first protrusion protruding convexly into the combustion chamber while being inclined from an upper side to a lower side;

상기 제1돌출부에 하측으로 연장되면서 다시 연소실의 내측을 향해 돌출되는 제2돌출부;A second protrusion extending downward toward the first protrusion and protruding toward the inside of the combustion chamber again;

를 포함하여 구성된 구조로 할 수 있다.It may be configured to include a structure.

상기 연소실의 단면 형상은 중심부가 상측으로 볼록하게 만곡되어 형성되고;The cross-sectional shape of the combustion chamber is formed by convexly curved in the center;

상기 중심부와 상기 제2돌출부 사이는 부드러운 원호형의 함몰부로 서로 연결된 구조로 할 수 있다.The central portion and the second protrusion may be connected to each other by a soft arc-shaped depression.

본 발명은 엔진에서 배출되는 배기가스를 별도의 후처리 장치에 의해 처리하지 않고도, 배기가스규제를 충족할 수 있는 수준의 배기가스를 배출하며, 연비도 적절한 수준으로 확보할 수 있도록 한다.The present invention discharges the exhaust gas to meet the exhaust gas regulation without having to treat the exhaust gas discharged from the engine by a separate after-treatment device, it is possible to ensure the fuel economy at an appropriate level.

도 2 내지 도 4를 참조하면, 본 발명 실시예들은 피스톤(1)의 상측면에 보울의 형상으로 형성되는 대형차량용 엔진의 연소실 구조에 있어서, 상기 연소실(3)의 단면형상은 가장자리 부위가 상측으로부터 하측으로 적어도 2번 이상의 굴곡(5)을 형성하면서 함몰되는 구조로 이루어진다.2 to 4, embodiments of the present invention in the combustion chamber structure of a large vehicle engine formed in the shape of a bowl on the upper side of the piston (1), the cross-sectional shape of the combustion chamber (3) is the upper edge portion It is made of a structure that is recessed while forming at least two bends 5 or more from the lower side.

상기 연소실(3) 단면형상의 가장자리 부위는 상측으로부터 하측으로 경사지면서 볼록하게 연소실(3) 내측으로 돌출되는 제1돌출부(7)와, 상기 제1돌출부(7)에 하측으로 연장되면서 다시 연소실(3)의 내측을 향해 돌출되는 제2돌출부(9)를 포함하여 구성된다.The edge portion of the cross section of the combustion chamber 3 is inclined downward from the upper side and protrudes into the combustion chamber 3 convexly, and extends downward to the first protrusion 7 and again to the combustion chamber ( And a second projection 9 that protrudes toward the inside of 3).

상기 연소실(3)의 단면 형상은 중심부(11)가 상측으로 볼록하게 만곡되어 형성되고, 상기 중심부(11)와 상기 제2돌출부(9) 사이는 부드러운 원호형의 함몰부(13)로 서로 연결된 구조이다.The cross-sectional shape of the combustion chamber 3 is formed by convexly curved at the center 11, and the center 11 and the second protrusion 9 are connected to each other by a soft arc-shaped recess 13. Structure.

상기한 바와 같이 구조의 대형차량용 엔진의 연소실 구조에서는 연료의 연소 시에 연소실(3)의 온도분포가 종래보다 균일하게 형성된다.As described above, in the combustion chamber structure of a large vehicle engine of the structure, the temperature distribution of the combustion chamber 3 is uniformly formed at the time of combustion of fuel.

즉, 종래에는 연소실의 온도분포가 연소실의 단면형상의 가장자리 부위의 굴곡진 부위에 집중되는데, 상기 굴곡진 부위가 종래에는 한 곳이어서 이곳의 온도가 국부적으로 높아지게 되지만, 본 발명에 의한 연소실 구조에서는 상기 굴곡진 부위가 상기 제1돌출부(7)와 제2돌출부(9)를 형성하면서 2곳 이상으로 형성됨으로써, 온도 분포가 좀더 고르게 넓은 표면적에 분포될 수 있도록 하여, 국부적으로 온도가 높은 영역을 제거함으로써, 배기가스의 유해성분을 줄이도록 하는 것이다.That is, in the prior art, the temperature distribution of the combustion chamber is concentrated at the bent portion of the edge portion of the cross section of the combustion chamber, but the bent portion is conventionally one place so that the temperature thereof is locally increased. The curved portion is formed in two or more places while forming the first protrusions 7 and the second protrusions 9, so that the temperature distribution can be more evenly distributed over a large surface area, thereby making the region with a high temperature locally. By removing it, it is possible to reduce harmful components of the exhaust gas.

따라서, 본 발명에 따른 연소실 구조를 가진 엔진을 탑재한 차량의 경우 다른 조건이 동일할 때, 거의 비슷한 연비 성능을 확보하면서도, 연소실의 고온의 분위기에서 발생하는 질소산화물의 발생량을 현저히 줄여줄 수 있도록 하여, 최근의 강화되고 있는 배기가스규제를 충족할 수 있도록 한다.Accordingly, in the case of a vehicle equipped with an engine having a combustion chamber structure according to the present invention, when the other conditions are the same, the fuel consumption may be substantially reduced, and the amount of nitrogen oxide generated in the high temperature atmosphere of the combustion chamber may be significantly reduced. In order to meet the recently tightened exhaust gas regulations.

도 1은 종래의 대형차량용 엔진의 연소실 구조를 설명한 도면,1 is a view illustrating a combustion chamber structure of a conventional large vehicle engine;

도 2는 본 발명에 따른 대형차량용 엔진의 연소실 구조의 일 예를 도시한 도면,2 is a view showing an example of a combustion chamber structure of a large vehicle engine according to the present invention;

도 3은 본 발명에 따른 대형차량용 엔진의 연소실 구조의 다른 예를 도시한 도면,3 is a view showing another example of a combustion chamber structure of a large vehicle engine according to the present invention;

도 4는 도 2와 도 3을 함께 비교하여 도시한 도면이다.4 is a diagram comparing FIG. 2 and FIG. 3 together.

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

1; 피스톤 3; 연소실One; Piston 3; combustion chamber

5; 굴곡 7; 제1돌출부5; Bend 7; First protrusion

9; 제2돌출부 11; 중심부9; Second projection 11; center

13; 함몰부 13; Depression

Claims (3)

피스톤의 상측면에 보울의 형상으로 형성되는 대형차량용 엔진의 연소실 구조에 있어서,In the combustion chamber structure of an engine for a large vehicle formed in the shape of a bowl on the upper side of the piston, 상기 연소실의 단면형상은 가장자리 부위가 상측으로부터 하측으로 적어도 2번 이상의 굴곡을 형성하면서 함몰되는 구조로 이루어진 것The cross-sectional shape of the combustion chamber has a structure in which the edge portion is recessed while forming at least two bends from the upper side to the lower side. 을 특징으로 하는 대형차량용 엔진의 연소실 구조.Combustion chamber structure of a large vehicle engine, characterized in that. 청구항 1에 있어서,The method according to claim 1, 상기 연소실 단면형상의 가장자리 부위는 상측으로부터 하측으로 경사지면서 볼록하게 연소실 내측으로 돌출되는 제1돌출부와;The edge portion of the cross section of the combustion chamber may include: a first protrusion protruding convexly into the combustion chamber while being inclined from an upper side to a lower side; 상기 제1돌출부에 하측으로 연장되면서 다시 연소실의 내측을 향해 돌출되는 제2돌출부;A second protrusion extending downward toward the first protrusion and protruding toward the inside of the combustion chamber again; 를 포함하여 구성된 것을 특징으로 하는 대형차량용 엔진의 연소실 구조.Combustion chamber structure of a large vehicle engine, characterized in that configured to include. 청구항 2에 있어서,The method according to claim 2, 상기 연소실의 단면 형상은 중심부가 상측으로 볼록하게 만곡되어 형성되고;The cross-sectional shape of the combustion chamber is formed by convexly curved in the center; 상기 중심부와 상기 제2돌출부 사이는 부드러운 원호형의 함몰부로 서로 연결된 것Between the center portion and the second protrusions are connected to each other by a soft arc-shaped depression 을 특징으로 하는 대형차량용 엔진의 연소실 구조.Combustion chamber structure of a large vehicle engine, characterized in that.
KR1020070131808A 2007-12-15 2007-12-15 Combustion chamber structure of engine for heavy duty vehicle KR20090064227A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101793206A (en) * 2010-03-17 2010-08-04 大连理工大学 Direction-injection diesel engine combustion chamber
CN102678260A (en) * 2011-03-14 2012-09-19 广西玉柴机器股份有限公司 Combustion chamber of high-speed diesel engine
CN104879233A (en) * 2015-06-08 2015-09-02 广西玉柴机器股份有限公司 Direct-injection type diesel engine
US9562465B2 (en) 2014-07-23 2017-02-07 Hyundai Motor Company Dual pre-chamber piston bowl system
CN107917014A (en) * 2016-10-11 2018-04-17 卡特彼勒公司 Combustion bowl for the piston of engine
CN114526152A (en) * 2022-04-22 2022-05-24 潍柴动力股份有限公司 Combustion chamber and diesel engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101793206A (en) * 2010-03-17 2010-08-04 大连理工大学 Direction-injection diesel engine combustion chamber
CN102678260A (en) * 2011-03-14 2012-09-19 广西玉柴机器股份有限公司 Combustion chamber of high-speed diesel engine
US9562465B2 (en) 2014-07-23 2017-02-07 Hyundai Motor Company Dual pre-chamber piston bowl system
CN104879233A (en) * 2015-06-08 2015-09-02 广西玉柴机器股份有限公司 Direct-injection type diesel engine
CN107917014A (en) * 2016-10-11 2018-04-17 卡特彼勒公司 Combustion bowl for the piston of engine
CN107917014B (en) * 2016-10-11 2021-07-06 卡特彼勒公司 Combustion bowl for a piston of an engine
CN114526152A (en) * 2022-04-22 2022-05-24 潍柴动力股份有限公司 Combustion chamber and diesel engine

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