KR200173927Y1 - Structure of intake port for directly injected engine with 4 valve - Google Patents
Structure of intake port for directly injected engine with 4 valve Download PDFInfo
- Publication number
- KR200173927Y1 KR200173927Y1 KR2019960061748U KR19960061748U KR200173927Y1 KR 200173927 Y1 KR200173927 Y1 KR 200173927Y1 KR 2019960061748 U KR2019960061748 U KR 2019960061748U KR 19960061748 U KR19960061748 U KR 19960061748U KR 200173927 Y1 KR200173927 Y1 KR 200173927Y1
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- KR
- South Korea
- Prior art keywords
- intake port
- direct injection
- injection engine
- combustion chamber
- center line
- Prior art date
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Classifications
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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
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
본 고안의 목적은 실린더 내에서의 유동현상을 최적화하여 연소성능을 향상시키고 희박연소를 가능케 하는 직접분사엔진의 흡기포트 구조를 제공하는 데 있다.An object of the present invention is to provide an intake port structure of a direct injection engine that optimizes the flow phenomenon in a cylinder to improve combustion performance and enable lean combustion.
상기한 목적을 달성하기 위하여 본 고안은 4-밸브 타입의 직접분사엔진의 흡기포트에 있어서, 2개의 흡기포트에는 각기 가로방향의 격벽이 형성되어지되 상기 일측 격벽을 흡기포트의 중심선으로부터 연소실측으로 갈수록 상향 경사지게 형성되며 타측격벽은 흡기포트의 중심선으로부터 연소실측으로 갈수록 하향경사지게 형성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides an intake port of a four-valve type direct injection engine, in which two intake ports are formed with transverse bulkheads, respectively, from the center line of the intake port toward the combustion chamber side. It is formed to be inclined upwardly and the other side partition is formed to be inclined downward toward the combustion chamber from the center line of the intake port.
Description
본 고안은 연소실내에 연료를 직접 분사하는 4-밸브 타입의 직접분사엔진(Direct Injection Engine)의 흡기포트 구조 개선에 관한 것이다.The present invention relates to an improvement of the intake port structure of a four-valve type direct injection engine that directly injects fuel into a combustion chamber.
연료는 인젝터(4)를 통하여 직접연소실(8)에 분사하는 직접분사엔진은 제5도에 도시하는 것과 같이 실린더헤드(1)의 구조상 인젝터(4)가 흡기포트(2)(3)에의 간섭을 피하여 하부로 낮게 설치되어 있다.In the direct injection engine in which fuel is injected into the direct combustion chamber 8 through the injector 4, the injector 4 interferes with the intake ports 2 and 3 due to the structure of the cylinder head 1 as shown in FIG. It is installed low to avoid.
그런데 직접분사엔진의 경우 연료가 연소실(8)에 직접 분사되므로 연료의 무화시간이 짧아 연료의 무화를 촉진하기 위해서는 혼합기의 와류형성이 중요하다.However, in the case of the direct injection engine, since the fuel is directly injected into the combustion chamber 8, the atomization time of the fuel is short, so that the vortex formation of the mixer is important to promote the atomization of the fuel.
또한 흡기포트(2)(3)를 통해 도입되는 공기가 인젝터(4) 측으로 유도된 후 피스톤에 의해 받쳐져 스파크플러그(5) 주변으로 유도되도록 역텀블(공기가 S자 형상을 그리는 와류발생을 말함)을 발생하여야 희박연소가 가능하다.In addition, the air introduced through the intake ports (2) and (3) is guided to the injector (4) side and is supported by the piston and guided around the spark plug (5). Lean burning is possible.
그러나 종래의 경우 흡기포트(2)(3)의 단면형상이 제6도에 도시된 것과 같이 단순히 원형단면이어서 실린더 내에서의 혼합기의 유동 특성이 좋지 않아 연료의 무화성이 낮다는 문제점이 있었다.However, in the conventional case, since the cross-sectional shape of the intake ports 2 and 3 is simply a circular cross section as shown in FIG. 6, the flow characteristics of the mixer in the cylinder are not good, and thus there is a problem that the atomization of the fuel is low.
이에 본 고안은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 것은 실린더 내에서의 유동현상을 최적화하여 연소성능을 향상시키고 희박연소를 가능케 하는 직접분사엔진의 흡기포트 구조를 제공하는 데 있다.The present invention has been proposed in view of the above problems, and its object is to provide an intake port structure of a direct injection engine that optimizes the flow phenomenon in a cylinder to improve combustion performance and enable lean combustion.
상기한 목적을 달성하기 위하여 본 고안은 4-밸브 타입의 직접분사엔진의 흡기포트에 있어서, 2개의 흡기포트에는 각기 가로방향의 격벽이 형성되어지되 상기 일측 격벽을 흡기포트의 중심선으로부터 연소실측으로 갈수록 상향 경사지게 형성되며 타측격벽은 흡기포트의 중심선으로부터 연소실측으로 갈수록 하향경사지게 형성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides an intake port of a four-valve type direct injection engine, in which two intake ports are formed with transverse bulkheads, respectively, from the center line of the intake port toward the combustion chamber side. It is formed to be inclined upwardly and the other side partition is formed to be inclined downward toward the combustion chamber from the center line of the intake port.
제1도는 본 고안에 의한 4-밸브 타입의 직접분사엔진의 흡기포트 구조를 나타내는 도면.1 is a view showing the intake port structure of a four-valve type direct injection engine according to the present invention.
제2도는 동상 흡기포트 격벽의 변형례를 나타내는 도면.2 is a view showing a modification of the in-phase intake port partition wall.
제3도는 제1도의 A-A 단면도.3 is a cross-sectional view taken along line A-A of FIG.
제4도는 제1도의 B-B 단면도.4 is a sectional view taken along line B-B in FIG.
제5도는 종래기술.5 is a prior art.
제6도는 제5도의 C-C 단면도.6 is a cross-sectional view taken along line C-C of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 실린더헤드 2, 3 : 흡기포트1: Cylinder head 2, 3: Intake port
4 : 인젝터 5 : 스파크플러그4: injector 5: spark plug
6, 7 : 격벽 8 : 연소실6, 7: bulkhead 8: combustion chamber
이하 본 고안의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings the configuration and operation of the present invention.
제1도와 제2도는 본 고안에 의한 직접분사엔진의 실린더헤드의 형상을 나타내는 도면이며 제3도는 제1도의 A-A단면도이며 제4도는 제1도의 C-C단면도이다.1 and 2 are views showing the shape of the cylinder head of the direct injection engine according to the present invention, FIG. 3 is an A-A cross section of FIG. 1 and FIG. 4 is a C-C cross-sectional view of FIG.
도면중 부호1은 4-밸브타입의 직접분사엔진의 실린더헤드이며 부호(2)(3)은 흡기포트이며 부호 4는 인젝터이며 부호 5는 스파크 플러그이다.In the drawing, reference numeral 1 denotes a cylinder head of a four-valve type direct injection engine, numerals 2 and 3 are intake ports, numeral 4 is an injector, and numeral 5 is a spark plug.
상기 2개의 흡기포트(2)(3)의 각각에는 포트를 상하로 구획하는 격벽(6)(7)이 형성되어 있으며 이 격벽(6)(7)은 일측은 수평중심선(X-X)을 기준으로 연소실측으로 갈수록 상향 경사지게 형성하고 타측은 하향 경사지게 하는 것이 보다 좋으며 그 경사각(γ)은 상하 ±6°의 범위 이내로 한정하므로써 최상의 유동(스월+텀블발생)을 가져올 수 있으며 그 각도범위를 넘어서서 형성되면 유량계수(Cf)의 급격한 감소로 오히려 효과가 감소된다.Each of the two intake ports 2 and 3 is formed with partitions 6 and 7 for partitioning the port up and down. The partitions 6 and 7 have one side on the horizontal center line XX. It is better to be inclined upward toward the combustion chamber and to be inclined downward on the other side, and the inclination angle (γ) can be brought to the best flow (swirl + tumble occurrence) by being limited within the range of up and down ± 6 °. The effect is rather reduced by a sharp decrease in the number Cf.
이 격벽(6)(7)은 제1도에서와 같이 X자형으로 하거나 또는 제2도에서와 같이 v자 형상으로 할 수 있다.The partitions 6 and 7 can be X-shaped as in FIG. 1 or v-shaped as in FIG.
또한 상기 각각의 격벽(6)(7)은 단면도에서 볼수 있듯이 수평선(X-X)을 중심으로 좌우로 기울어지도록 형성(즉 중심점을 기준으로 회전된 형상을 말함) 할 경우 흡기포트(2)(3)를 통과하는 공기의 유동이 회오리바람처럼 회전하는 특성을 갖게된다.In addition, as shown in the cross-sectional view, each of the partitions 6 and 7 is inclined to the left and right about the horizontal line XX (that is, the shape rotated about the center point). The flow of air passing through it will have the characteristic of rotating like a whirlwind.
이 비틀림각(회전각)은 시작되는 점의 각도(α1)(β1) 보다 연소실측의 격벽(6)(7) 단부의 비틀림각(αl)(β2)이 더 큰 각을 갖는다.This torsion angle (rotation angle) has an angle where the torsion angle αl (β2) at the end of the partition walls 6 and 7 on the combustion chamber side is larger than the angle α1 (β1) of the starting point.
이와같은 본 고안은 격벽(6)(7)을 포트 중심선위로 상향 경사지게 설치하였을 경우에는 공기의 유동이 정텀블(흡기밸브의 상부측을 통과하여 연소실로 유입)을 발생하고 포트 중심선 아래로 하향 경사지게 설치하였을 때에는 역텀블(흡기밸브 하부를 통해 인젝터측을 경유하여 연소실 중앙으로 유동되는 현상)을 발생하게 된다.In the present invention, when the partitions 6 and 7 are installed to be inclined upwardly above the port center line, the flow of air generates a forward tumble (inflow into the combustion chamber through the upper side of the intake valve) and is inclined downwardly below the port centerline. When installed, the reverse tumble (phenomena flowing to the center of the combustion chamber via the injector side through the intake valve bottom) occurs.
그리고 격벽(6)(7)의 경사각 α, β는 인젝션 위치와 점화플러그의 상관관계를 고려하여 결정하게 된다.Incident angles α and β of the partitions 6 and 7 are determined in consideration of the correlation between the injection position and the spark plug.
이상과 같은 본 고안에 의하면 흡기포트에 가로방향의 격벽을 설치하므로써 3차원 유동(스월과 텀블발생)을 유도하게 되며 특히 격벽을 포트의 중심선을 기준으로 상하로 경사지게 형성하거나 또는 좌우로 비틀린 회전각을 갖도록 형성하므로써 공기의 유동 특성을 좋게하여 연료의 고른 혼합에 따른 완전연소를 촉진하고 희박연소가 가능하여 연비를 개선하고 배기가스 배출량을 저감하게 되는 효과가 있다.According to the present invention as described above, the three-dimensional flow (swirl and tumble generation) is induced by installing a horizontal partition wall in the intake port, and in particular, the partition wall is formed to be inclined up and down or twisted from side to side based on the center line of the port. It is formed to have a good flow characteristics of the air to promote the complete combustion according to the even mixing of the fuel and lean burning is possible to improve the fuel efficiency and reduce the exhaust gas emissions.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960061748U KR200173927Y1 (en) | 1996-12-30 | 1996-12-30 | Structure of intake port for directly injected engine with 4 valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960061748U KR200173927Y1 (en) | 1996-12-30 | 1996-12-30 | Structure of intake port for directly injected engine with 4 valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980048583U KR19980048583U (en) | 1998-09-25 |
| KR200173927Y1 true KR200173927Y1 (en) | 2000-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960061748U KR200173927Y1 (en) | 1996-12-30 | 1996-12-30 | Structure of intake port for directly injected engine with 4 valve |
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| Country | Link |
|---|---|
| KR (1) | KR200173927Y1 (en) |
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1996
- 1996-12-30 KR KR2019960061748U patent/KR200173927Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR19980048583U (en) | 1998-09-25 |
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