KR200173924Y1 - Piston for directly injected engine - Google Patents
Piston for directly injected engine Download PDFInfo
- Publication number
- KR200173924Y1 KR200173924Y1 KR2019960058028U KR19960058028U KR200173924Y1 KR 200173924 Y1 KR200173924 Y1 KR 200173924Y1 KR 2019960058028 U KR2019960058028 U KR 2019960058028U KR 19960058028 U KR19960058028 U KR 19960058028U KR 200173924 Y1 KR200173924 Y1 KR 200173924Y1
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- KR
- South Korea
- Prior art keywords
- piston
- combustion chamber
- injector
- exhaust
- present
- Prior art date
Links
Classifications
-
- 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
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
-
- 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
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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
본 고안의 목적은 인젝터로부터 분사되는 연료가 배기포트측으로 확산되는 것을 차단하고 강한 와류를 일으켜 스파크 플러그 주변에 고르고 농후한 혼합기를 형성하므로써 화염전파 특성이 개선되어 희박연소를 가능케 하는 직접분사 엔진용 피스톤을 제공하는 데 있다.The purpose of the present invention is to prevent the fuel injected from the injector from diffusing to the exhaust port side, and to create a strong and vortex to form an even and dense mixer around the spark plug, which improves flame propagation and enables lean combustion. To provide.
상기한 목적을 달성하기 위하여 본 고안은 인젝터를 통하여 연소실에 연료를 직접 분사하는 직접분사 엔진용의 피스톤에 있어서, 상기 피스톤의 상부면은 흡기측과 배기측을 경사지게 돌출시킨 크라운부를 형성하고 상기 크라운부의 흡기측 경사면에는 보울형 연소실을 형성하며 배기측 경사면에는 2개의 작은 요홈을 형성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a piston for a direct injection engine that directly injects fuel into a combustion chamber through an injector, wherein an upper surface of the piston forms a crown portion protruding inclined from an intake side and an exhaust side, and the crown A bowl-type combustion chamber is formed on the negative intake side slope and two small grooves are formed on the exhaust side slope.
Description
본 고안은 연소 특성을 개선하기 위한 직접분사 엔진용 피스톤에 관한 것이다.The present invention relates to a piston for a direct injection engine for improving combustion characteristics.
직접연료분사 엔진은 제3도에 도시하는 것과 같이 흡기포트(2) 하측의 실린더헤드(1)에 장착된 인젝터(4)를 통하여 연소실(10)에 연료를 직접 분사하는 방식의 엔진을 지칭하는 것으로 직접분사 엔진은 연료와 공기가 혼합되는 시간이 부족하므로 충분한 혼합기를 형성하기 위하여 혼합기의 와류를 촉진하도록 엔진을 설계한다.The direct fuel injection engine refers to an engine in which fuel is injected directly into the combustion chamber 10 through an injector 4 mounted on the cylinder head 1 below the intake port 2 as shown in FIG. Since direct injection engines lack the time for fuel and air to mix, the engine is designed to promote the vortex of the mixer to form a sufficient mixer.
이를위해 흡기포트(2)를 헬리컬 형상으로 만들므로써 연소실(10)에 도입되는 공기가 소용돌이쳐 와류를 형성하게 되므로써 연료와 공기가 고르게 혼합되도록 하고 있다.To this end, by making the intake port 2 into a helical shape, the air introduced into the combustion chamber 10 is swirled to form a vortex so that fuel and air are evenly mixed.
또한 실린더혜드(1)를 연소실 내측으로 돌출시킨 스퀴쉬 영역(11)을 두므로써 피스톤(5)이 압축시 스퀴쉬 영역(11) 내에서 압축되는 가스가 넓은 공간의 연소실로 분출토록 하여 와류를 촉진토록 하고 있다.In addition, the squish region 11 which protrudes the cylinder head 1 into the combustion chamber is provided so that the gas compressed in the squish region 11 when the piston 5 is compressed may be ejected into the combustion chamber of a large space. It is promoting.
그러나 상기한 구조에 의하면 인젝터(4)가 흡기포트(2)와의 간섭을 피하여 낮게 예각으로 설치되므로써 분사되는 연료가 배기포트 쪽으로 확산되어 스파크 플러그(9) 주변의 혼합기 농도가 낮고 불규칙하여 화염전파 특성이 낮으므로 희박연소 특성이 나쁘기 때문에 연비를 개선하기가 곤란하다는 문제점이 지적되고 있다.However, according to the above structure, since the injector 4 is installed at a low acute angle to avoid interference with the intake port 2, the injected fuel diffuses toward the exhaust port, and the concentration of the mixer around the spark plug 9 is low and irregular. It is pointed out that since it is low, it is difficult to improve fuel efficiency because lean burn characteristics are bad.
이에 본 고안은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 바는 인젝터로부터 분사되는 연료가 배기포트측으로 확산되는 것을 차단하고 강한 와류를 일으켜 스파크 플러그 주변에 고르고 농후한 혼합기를 형성하므로써 화염전파 특성이 개선되어 희박연소를 가능케 하는 직접분사 엔진용 피스톤을 제공하는데 있다.Therefore, the present invention has been proposed in view of the above problems, and its purpose is to prevent the fuel injected from the injector from diffusing to the exhaust port side and to generate a strong vortex to form an even and dense mixer around the spark plug. It is an object of the present invention to provide a piston for a direct injection engine that has improved characteristics to enable lean combustion.
상기한 목적을 달성하기 위하여 본 고안은 인젝터를 통하여 연소실에 연료를 직접 분사하는 직접분사 엔진용의 피스톤에 있어서, 상기 피스톤의 상부면은 흡기측과 배기측을 경사지게 돌출시킨 크라운부를 형성하고 상기 크라운부의 흡기측 경사면에는 보울형 연소실을 형성하며 배기측 경사면에는 2개의 작은 요홈을 형성한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a piston for a direct injection engine that directly injects fuel into a combustion chamber through an injector, wherein an upper surface of the piston forms a crown portion protruding inclined from an intake side and an exhaust side, and the crown A bowl-type combustion chamber is formed on the negative intake side slope and two small grooves are formed on the exhaust side slope.
제1도는 본 고안에 의한 직접분사 엔진을 나타내는 도면.1 is a view showing a direct injection engine according to the present invention.
제2도는 본고안 피스톤의 평면도.2 is a plan view of the piston in the present design.
제3도는 종래의 직접분사엔진.3 is a conventional direct injection engine.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 실린더헤드 2 : 흡기포트1: Cylinder head 2: Intake port
3 : 배기포트 4 : 인젝터3: exhaust port 4: injector
5 : 피스톤 6 : 크라운부5: piston 6: crown
7 : 보울형 연소실 8 : 요홈7: bowl-type combustion chamber 8: groove
9 : 스파크 플러그9: spark plug
제1도는 본 고안에 의한 직접분사 엔진을 나타내는 도면이며 제2도는 본 고1 is a view showing a direct injection engine according to the present invention and FIG. 2 is a
안의 피스톤의 평면도이다.Top view of the piston inside.
도면중 부호 1은 실린더헤드이며 부호 2와 3은 각기 흡기포트와 배기포트이며 부호 4는 인젝터이다.In the figure, reference numeral 1 denotes a cylinder head, reference numerals 2 and 3 denote intake and exhaust ports, respectively, and reference numeral 4 denotes an injector.
상기 인젝터(4)는 흡기포트(2) 하부로 설치되어 연소실에 연료를 분사하게 된다.The injector 4 is installed below the intake port 2 to inject fuel into the combustion chamber.
본 고안 피스톤(5)의 상부는 흡기포트측과 배기포트측이 각기 경사지는 형태로 중앙부가 상부로 블록하게 돌출한 크라운부(6)가 형성되어 있으며 크라운부(6)의 흡기포트측 경사면에는 보울형 연소실(7)의 형성되고 배기포트측 경사면에는 작은 크기의 2개의 요홈(8)이 형성되어 있다.The upper part of the present invention piston (5) is formed in the inclined surface of the inlet port side and the exhaust port side is inclined, respectively, the crown portion 6 protruding to block the upper portion formed on the inlet port side of the crown 6 A bowl-type combustion chamber 7 is formed, and two recesses 8 of small size are formed in the inclined surface of the exhaust port side.
이와같은 본 고안은 인젝터(4)로부터 분사되는 연료가 보울형 연소실(7)의 구형 곡면의 안내를 따라 맴돌이(와류)를 형성하게 되며 높게 솟아있는 크라운부(6)에 의해 배기측 확산을 방지하고 강하게 형성된 와류가 스파크 플러그(9) 주변에 고르게 형성되므로 화염전파가 잘되게 되어 희박연소가 가능하게 된다.The present invention is such that the fuel injected from the injector (4) forms a eddy (vortex) along the guide of the spherical curved surface of the bowl-type combustion chamber (7) and prevents the diffusion on the exhaust side by the high crown portion (6) And the strongly formed vortex is formed evenly around the spark plug (9) so that the flame propagation is good and lean burn is possible.
그리고 배기측의 작은 요홈(8)은 유동 특성이 좋지않은 배기측의 혼합기가 압축시 와류를 형성하는 데 도움을 주게 된다.And the small groove 8 on the exhaust side helps the mixer on the exhaust side, which has poor flow characteristics, to form a vortex during compression.
이상과 같은 본 고안에 의하면 피스톤 상면을 상부로 돌출시키고 보울형 연소실을 형성하는 것에 의해서 인젝터로부터 분사되는 연료가 배기쪽으로 확산되는 것을 차단하고 보울형 연소실에 고른 혼합기가 농후하게 존재하여 화염전파 특성이 안정화되므로 희박 연소시에도 점화가 가능하여 연비를 향상하게 되는 효과가 있다.According to the present invention as described above, by protruding the upper surface of the piston and forming a bowl-type combustion chamber, the fuel injected from the injector is prevented from being diffused to the exhaust side, and a rich mixer exists in the bowl-type combustion chamber, so that flame propagation characteristics Since it is stabilized, it is possible to ignite even in lean combustion, thereby improving fuel economy.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960058028U KR200173924Y1 (en) | 1996-12-27 | 1996-12-27 | Piston for directly injected engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960058028U KR200173924Y1 (en) | 1996-12-27 | 1996-12-27 | Piston for directly injected engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980044890U KR19980044890U (en) | 1998-09-25 |
| KR200173924Y1 true KR200173924Y1 (en) | 2000-04-01 |
Family
ID=19483782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960058028U KR200173924Y1 (en) | 1996-12-27 | 1996-12-27 | Piston for directly injected engine |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR200173924Y1 (en) |
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1996
- 1996-12-27 KR KR2019960058028U patent/KR200173924Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR19980044890U (en) | 1998-09-25 |
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