KR19980029224A - Knocking noise reduction device of engine - Google Patents
Knocking noise reduction device of engine Download PDFInfo
- Publication number
- KR19980029224A KR19980029224A KR1019960048468A KR19960048468A KR19980029224A KR 19980029224 A KR19980029224 A KR 19980029224A KR 1019960048468 A KR1019960048468 A KR 1019960048468A KR 19960048468 A KR19960048468 A KR 19960048468A KR 19980029224 A KR19980029224 A KR 19980029224A
- Authority
- KR
- South Korea
- Prior art keywords
- knocking
- engine
- valve
- reduction device
- noise reduction
- Prior art date
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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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/09—Reducing noise
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
본 발명의 목적은 헬름헤르츠 공조상자(Helmheltz Resonator)를 이용하여 노킹음에 의한 진동음을 감쇄시킬 수 있는 엔진의 노킹소음 저감장치를 제공하는데 있다.An object of the present invention is to provide a knocking noise reduction device of an engine that can attenuate vibration sound by knocking sound using a Helmheltz Resonator.
상기한 목적을 달성하기 위한 본 발명의 수단은 노킹 주파수에 튜닝되어 노킹 소음을 흡수하도록 실린더 헤드(1)에 형성된 호리병 형태의 헬름헤르츠 공조상자(8)와 연소가스가 폭발되어 피스톤(2)이 하강하는 동안에 발생하는 노킹음 발생구간에 상기 헬름헤르츠 공조상자의 입구를 연소실(3)에 대하여 개방하는 밸브(9)와 를 포함하여 구성되어 있음을 요지로 하고 있다.Means of the present invention for achieving the above object is a Helical Hertz air conditioner box 8 and a combustion gas exploded into a piston bottle 2 formed in a cylinder head 1 to tune to a knocking frequency to absorb knocking noise. The key point of the present invention is to include a valve 9 for opening the inlet of the helmherz air conditioning box with respect to the combustion chamber 3 in the knocking sound generation period generated during the descending.
Description
본 발명은 엔진의 노킹소음 저감을 위한 장치에 관한 것이다.The present invention relates to an apparatus for reducing knocking noise of an engine.
가솔린 엔진에 있어서 노킹은 혼합기의 화염전파중 엔드가스(end gas)가 순간 폭발될 때 발생하는 압력파가 실린더 내부에 가진되어 가스진동을 일으키게 되는 현상을 말하는 것으로 노킹이 발생하면 엔진이 심하게 진동하는 소음이 크게 발생하므로 승차감을 크게 저하시키게 된다.Knocking in a gasoline engine refers to a phenomenon in which a pressure wave generated when an end gas is instantaneously exploded during flame propagation of a mixer is excited inside a cylinder and causes gas vibration. When knocking occurs, the engine vibrates violently. The noise is greatly generated, which greatly reduces the ride comfort.
그러나 종래의 경우 스파크 플러그의 점화시기 제어 및 화염전파 특성 등을 감안하여 혼합기의 유동 특성을 변화시키는 측면에서의 연소실의 설계등에만 의존하므로써 노킹음 발생을 감소시키는데는 한계가 있는 것이었다.However, in the related art, in consideration of the ignition timing control and flame propagation characteristics of the spark plugs, there is a limit in reducing the occurrence of knocking sound by only relying on the design of the combustion chamber in terms of changing the flow characteristics of the mixer.
이에 본 발명은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 헬름헤르츠 공조상자(Helmheltz Resonator)를 이용하여 노킹음에 의한 진동음을 감쇄시킬 수 있는 엔진의 노킹소음 저감장치를 제공하는데 있다.Accordingly, the present invention has been proposed in view of the above-described problems, and provides a knocking noise reduction device for an engine capable of attenuating vibration sound by knocking sound using a Helmheltz Resonator for its purpose.
상기한 목적을 달성하기 위한 본 발명의 수단은 노킹 주파수에 튜딩되어 노킹 소음을 흡수하도록 실린더 헤드에 형성된 호리병 형태의 헬름헤르츠 공조상자와 연소가스가 폭발되어 피스톤이 하강하는 동안에 발생하는 노킹음 발생구간에 상기 헬름헤르츠 공조상자의입구를 연소실에 대하여 개방하는 밸브와;를 포함하여 구성되어 있음을 요지로 하고 있다.Means of the present invention for achieving the above object is a knocking sound generation period generated while the piston is lowered by the explosion of the Helmhertz air conditioner in the form of a bottle and a combustion gas formed in the cylinder head so as to absorb the knocking noise, which is tuted at the knocking frequency. And a valve for opening the inlet of the Helmhertz air conditioning box to the combustion chamber.
도 1 은 본 발명에 의한 엔진의 노킹소음 저감장치를 나타내는 도면1 is a view showing a knocking noise reduction device of the engine according to the present invention.
도 2 는 연소실에서 바라본 실린더헤드의 모습을 나타내는 도면2 is a view showing a state of the cylinder head as seen from the combustion chamber;
도 3 은 노킹발생 주파수와 헬름헤르츠 공조상자의 개방시기를 나타내는 도면3 is a view showing the knocking frequency and the opening time of the helm hertz air conditioning box
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 실린더헤드 2 : 피스톤1: cylinder head 2: piston
3 : 연소실 4(5) : 흡기(배기)포트3: combustion chamber 4 (5): intake (exhaust) port
6 : 흡기밸브 7 : 배기밸브6: intake valve 7: exhaust valve
8 : 헬름헤르츠 공조상자 9 : 밸브8: Helmhertz air conditioning box 9: valve
10 : 캠 11 : 밸브스프링10: cam 11: valve spring
이하 본 발명의 실시예를 첨부한 도면을 참조하여 설명한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
도 1은 본 발명에 의한 노킹음 저감을 위한 연소실의 구조를 나타내는 도면으로 도면중 부호 1은 실린더 헤드이며 실린더 헤드(1)와 피스톤(2)사이의 공간부는 연소실(3)이다.1 is a view showing a structure of a combustion chamber for reducing knocking sound according to the present invention, in which 1 is a cylinder head and a space between the cylinder head 1 and the piston 2 is the combustion chamber 3.
상기 실린더 헤드(1)에는 흡기포트(4)가 형성되어 혼합기를 도입하게 되며 흡배기포트(4)(5)에는 각기 흡기 또는 배기밸브(6)(7)가 개폐가능하게 마련되어 있다.An intake port 4 is formed in the cylinder head 1 to introduce a mixer, and the intake and exhaust ports 4 and 5 are provided to open and close intake or exhaust valves 6 and 7, respectively.
연소실(3)내에서 실린더 헤드(1)를 바라본 모습을 도시한 도 2 에서 볼수 있듯이 흡배기밸브(6)(7) 위치의 양측으로 호리병 형태의 헬름헤르츠 공조상자(8)가 1개 이상, 본 발명 실시예에서는 2개가 연소실(3)에 연통하도록 실린더 헤드(1)에 형성되어 있다.As shown in Fig. 2 showing the view of the cylinder head 1 in the combustion chamber 3, at least one Helmhertz air conditioner box 8 in the form of a vial is formed on both sides of the intake and exhaust valves 6 and 7 positions. In the embodiment, two are formed in the cylinder head 1 so as to communicate with the combustion chamber 3.
상기 헬름헤르츠 공조상자(8)의 입구는 직경이 작은 원통형 구멍이고 그의 후단은 구형상의 공간부로 형성되며 연소실(3)의 용적이 330㏄ 일때 대략 입구구멍의 직경은 8㎜, 구형공간부의 직경은 15㎜로 내용적이 대략 5.3㏄ 정도 되는 크기로 형성하는 것이 좋으며 이는 가솔린 엔진의 실린더내에서 발생되는 대략 6∼9㎑의 노킹을 흡수할 수 있도록 헬름헤르츠(Helmheltz)의 이론에 따라 설계한 결과이다.The inlet of the Helmhertz air-conditioning box 8 is a cylindrical hole having a small diameter, and the rear end thereof is formed as a spherical space part. It is recommended to form a size of about 5.3㏄ of 15mm inside, which is the result of Helmheltz's theory designed to absorb about 6 ~ 9 노 of knocking generated in the cylinder of gasoline engine. .
상기 헬름헤르츠 공조상자(8)는 밸브(9)에 의해 연소실(3)과 개방되거나 단절되며밸브(3)는 상부의 캠(10)의 회전에 의해 개폐 작동되고 밸브(9)의 폐쇄는 밸브스프링(11)의 탄발력에 의한다.The Helmhertz air conditioning box 8 is opened or disconnected from the combustion chamber 3 by the valve 9, the valve 3 is opened and closed by rotation of the upper cam 10, and the closing of the valve 9 is performed by the valve 9. It depends on the spring force of the spring 11.
상기 밸브(9)는 도 3 에서 도시하는 것과같이 피스톤(2)이 상사점 위치에서 폭발에 의해 하강할 때 노킹발생구간(a∼b)에서 헬름헤르츠 공조상자(8)를 연소실(3)에 대해 완전 개방하게 되며 혼합기의 화염 전파중 엔드가스(End gas)가 순간 폭발할 때 압력파에 의해 진동을 일으킬 때 개방된 공조상자(8)에 의해 노킹주파수가 흡수되어 진동할 수 없게 되는 것이다.As shown in FIG. 3, the valve 9 moves the Helmhertz air conditioning box 8 to the combustion chamber 3 at the knocking generation period a to b when the piston 2 descends by explosion at the top dead center position. When the end gas is instantaneously exploded during flame propagation of the mixer, the knocking frequency is absorbed by the open air conditioner 8, and the vibration cannot be vibrated.
이상과 같은 본 발명에 의한 노킹음 저감을 위한 연소실에 의하면 실린더 헤드에 노킹 주파수에 튜닝한 헬름헤르츠 공조상자를 마련하고 노킹 발생구간에 맞추어 개폐토록 하는것에 의해서 엔드가스가 순간 폭발할 때 발생하는 압력파에 의한 진동음을 감쇄시키게 되므로써 안락한 운전이 가능하게 된다.According to the combustion chamber for reducing the knocking sound according to the present invention as described above, the pressure generated when the end gas is instantaneously exploded by providing a helmhertz air conditioning box tuned to the knocking frequency in the cylinder head and opening and closing it according to the knocking period. By reducing the vibration sound caused by the wave, comfortable driving is possible.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960048468A KR100201606B1 (en) | 1996-10-25 | 1996-10-25 | Apparatus for reduction of knocking in an engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960048468A KR100201606B1 (en) | 1996-10-25 | 1996-10-25 | Apparatus for reduction of knocking in an engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980029224A true KR19980029224A (en) | 1998-07-25 |
| KR100201606B1 KR100201606B1 (en) | 1999-06-15 |
Family
ID=19479012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960048468A KR100201606B1 (en) | 1996-10-25 | 1996-10-25 | Apparatus for reduction of knocking in an engine |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100201606B1 (en) |
-
1996
- 1996-10-25 KR KR1019960048468A patent/KR100201606B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR100201606B1 (en) | 1999-06-15 |
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