KR102283769B1 - Exhaust system for vehicle - Google Patents

Exhaust system for vehicle Download PDF

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Publication number
KR102283769B1
KR102283769B1 KR1020150040629A KR20150040629A KR102283769B1 KR 102283769 B1 KR102283769 B1 KR 102283769B1 KR 1020150040629 A KR1020150040629 A KR 1020150040629A KR 20150040629 A KR20150040629 A KR 20150040629A KR 102283769 B1 KR102283769 B1 KR 102283769B1
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South Korea
Prior art keywords
exhaust
main pipe
valve
pipe
exhaust gas
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KR1020150040629A
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Korean (ko)
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KR20160114761A (en
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한학손
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현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/161—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers
    • F01N1/163—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/168—Silencing apparatus characterised by method of silencing by using movable parts for controlling or modifying silencing characteristics only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/04—Throttling-expansion and resonance

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

본 발명은, 배기가스의 유동 시 소음을 저감시키도록 배기파이프에 연결되는 차량용 배기장치로써, 배기가스가 일단에 형성된 유입구를 통해 유입되고 타단에 형성된 배출구를 통해 배출되도록 배기파이프에 연결되며, 상기 유입구와 배출구 사이에서 내경이 확장된 공명챔버가 형성된 주파이프;와 상기 주파이프에 장착되어 주파이프로 유입된 배기가스의 유동을 허용 또는 차단하도록 개폐가 이뤄지는 밸브; 및 상기 밸브가 닫혔을 때 배기가스가 우회하여 주파이프의 배출구로 유동하도록 일단은 주파이프의 유입구측과 개통되고 타단은 주파이프의 배출구측과 개통된 분기파이프;를 포함하는 것을 특징으로 한다.
전술한 바와 같은 구성을 갖는 본 발명은 배기파이프에 직접적으로 연결되는 구조를 가지므로 머플러 각각에서 배기가스의 유동량을 제어하는 종래 구조와 대비하여 생산원가를 낮출 수 있으며, 머플러 하우징의 크기를 더 증대시킬 수 있다.The present invention is an exhaust device for a vehicle connected to an exhaust pipe to reduce noise when the exhaust gas flows, and is connected to the exhaust pipe so that exhaust gas is introduced through an inlet formed at one end and discharged through an outlet formed at the other end, A main pipe having a resonance chamber with an enlarged inner diameter between the inlet and outlet; and a valve mounted on the main pipe to allow or block the flow of exhaust gas introduced into the main pipe; and a branch pipe having one end open with the inlet side of the main pipe and the other end with the outlet side of the main pipe so that the exhaust gas bypasses and flows to the outlet of the main pipe when the valve is closed.
Since the present invention having the above-described configuration has a structure directly connected to the exhaust pipe, the production cost can be lowered compared to the conventional structure in which the flow amount of exhaust gas is controlled in each muffler, and the size of the muffler housing is further increased can do it

Description

차량용 배기장치{Exhaust system for vehicle}Exhaust system for vehicle

본 발명은 배기가스의 유동 시 소음을 억제하되 다량의 배기가스가 생성되면 밸브를 개방하여 엔진출력을 증대시킬 수 있는 차량용 배기장치에 관한 것으로써, 더욱 상세하게는 종래의 머플러를 대신하여 배기가스의 유동량 및 소음발생을 제어할 수 있되 배기파이프에 직접적으로 장착되어 생산원가를 절감할 수 있고 더욱 소형화될 수 있는 차량용 배기장치에 관한 것이다.The present invention relates to an exhaust device for a vehicle capable of suppressing noise during the flow of exhaust gas but increasing engine output by opening a valve when a large amount of exhaust gas is generated, and more particularly, instead of a conventional muffler, exhaust gas It relates to an exhaust system for a vehicle that can control the flow rate and noise generation of a vehicle, but can be directly mounted on an exhaust pipe to reduce production costs and to be further miniaturized.

엔진에서 생성되는 배기가스는 차체 후방으로 배출되되 배기소음이 감소되도록 머플러를 통과한 후에 배출된다.The exhaust gas generated from the engine is discharged to the rear of the vehicle body, but after passing through the muffler to reduce exhaust noise, it is discharged.

차량에 장착되는 상기 머플러는 도 1 에 도시된 바와 같이 소정의 크기를 갖는 통 모양의 하우징(4)에 다수 개의 파이프들(1, 2, 3) 및 배플들(baffle)(6)이 장착되고 상기 하우징(4) 내부로 배기가스가 출입할 수 있도록 파이프들에는 통공들(2a, 3a)이 형성되어 배기가스의 유동 시 상기 배기가스의 팽창과 공명 및 흡음을 유도하여 배기소음이 낮아지도록 구성된다.As shown in FIG. 1, the muffler mounted on the vehicle is equipped with a plurality of pipes 1, 2, 3 and baffles 6 in a tubular housing 4 having a predetermined size. Through holes 2a and 3a are formed in the pipes to allow exhaust gas to enter and exit the housing 4, so that when the exhaust gas flows, it induces expansion, resonance, and sound absorption of the exhaust gas to lower the exhaust noise. do.

그리고, 엔진에서 생성되는 배기가스의 양은 차량의 주행상황에 따라 달라지므로, 주행상황에 따라 배기효율과 소음억제 성능을 더 효율적으로 조절할 수 있도록 배기가스가 배출되는 테일파이프들(1, 2) 중 하나에는 밸브(3)가 장착된다.And, since the amount of exhaust gas generated by the engine varies depending on the driving situation of the vehicle, among the tailpipes 1 and 2 from which exhaust gas is discharged, so that exhaust efficiency and noise suppression performance can be more efficiently adjusted according to the driving situation. One is equipped with a valve 3 .

상기 밸브(3)는 엔진의 저속 회전 시에는 게이트를 닫아 배기소음을 감소시키고 엔진의 고속 회전 시에는 게이트를 개방해 배기성능을 향상시키는 기능을 한다. The valve 3 closes the gate when the engine rotates at a low speed to reduce exhaust noise, and opens the gate when the engine rotates at a high speed to improve exhaust performance.

한편, 하나의 배기파이프에서 두 개로 분기된 듀얼머플러(도 2 의 머플러 장착구조 참조) 구조의 경우에는 머플러가 두 개소에 장착되어야 하고 밸브 또한 각각에 하나씩 장착되어야 하므로 생산 원가가 증가하는 문제가 발생한다. 또한, (테일파이프와 머플러 사이에 밸브 및 연계부품이 장착되는 관계로) 밸브(3)의 장착공간을 확보하기 위해 머플러의 크기가 줄어드는 문제가 있었다.
On the other hand, in the case of the dual muffler (refer to the muffler mounting structure of Fig. 2) branched from one exhaust pipe into two, the muffler must be mounted in two places and the valve must also be mounted one in each, causing a problem in that the production cost increases. do. In addition, there is a problem in that the size of the muffler is reduced in order to secure a mounting space for the valve 3 (because the valve and related parts are mounted between the tail pipe and the muffler).

따라서, 본 발명은 전술한 바와 같은 문제점을 해소할 수 있도록 듀얼머플러 구조를 갖는 차량에서 머플러를 대신하여 (머플러들로 분기되기 전에 배치된) 배기파이프에 장착되어 배기가스의 배출량에 따라 소음을 억제할 수 있고 머플러들의 크기를 증대시킬 수 있으며, 원가를 절감시킬 수 있는 차량용 배기장치를 제공하는 것에 주목적이 있다.
Accordingly, the present invention is mounted on an exhaust pipe (arranged before branching into mufflers) instead of a muffler in a vehicle having a dual muffler structure so as to solve the above-described problems, and suppresses noise according to the amount of exhaust gas It is possible to increase the size of the mufflers, and to provide an exhaust system for a vehicle that can reduce costs.

전술한 바와 같은 목적을 달성하기 위한 본 발명은, 배기가스의 유동 시 소음을 저감시키도록 배기파이프에 연결되는 차량용 배기장치로써, 배기가스가 일단에 형성된 유입구를 통해 유입되고 타단에 형성된 배출구를 통해 배출되도록 배기파이프에 연결되며, 상기 유입구와 배출구 사이에서 내경이 확장된 공명챔버가 형성된 주파이프;와 상기 주파이프에 장착되어 주파이프로 유입된 배기가스의 유동을 허용 또는 차단하도록 개폐가 이뤄지는 밸브; 및 상기 밸브가 닫혔을 때 배기가스가 우회하여 주파이프의 배출구로 유동하도록 일단은 주파이프의 유입구측과 개통되고 타단은 주파이프의 배출구측과 개통된 분기파이프;를 포함하는 것을 특징으로 한다. The present invention for achieving the above object is an exhaust device for a vehicle connected to an exhaust pipe to reduce noise when the exhaust gas flows, in which exhaust gas flows in through an inlet formed at one end and through an outlet formed at the other end A main pipe connected to the exhaust pipe so as to be discharged and having a resonance chamber having an enlarged inner diameter between the inlet and the outlet; and a valve mounted on the main pipe to allow or block the flow of exhaust gas introduced into the main pipe ; and a branch pipe having one end open with the inlet side of the main pipe and the other end with the outlet side of the main pipe so that the exhaust gas bypasses and flows to the outlet of the main pipe when the valve is closed.

상기 밸브가 닫혔을 때 헬름홀츠 공명(Helmholtz resonance)에 따라 공명챔버에 의해 배기가스의 유동소음이 낮춰지도록 상기 밸브는 공명챔버에서 배기가스가 배출되는 출구측을 폐쇄할 수 있는 위치에 장착된다.When the valve is closed, the valve is mounted at a position capable of closing the outlet side from which the exhaust gas is discharged from the resonance chamber so that the flow noise of the exhaust gas is lowered by the resonance chamber according to the Helmholtz resonance.

그리고, 상기 밸브는 전원인가에 따라 개폐가 제어되는 전자식 밸브이며, 상기 분기파이프의 직경은 주파이프의 직경보다 작게 형성된다.In addition, the valve is an electromagnetic valve whose opening and closing is controlled according to the application of power, and the diameter of the branch pipe is smaller than the diameter of the main pipe.

아울러, 상기 주파이프는 유입구측 끝단 또는 배출구측 끝단에는 직경이 확장된 플랜지가 결합되며, 상기 플랜지는 배기파이프에 형성된 플랜지와 볼팅체결된다.
In addition, the main pipe is coupled to an inlet side end or an outlet side end with a flange having an expanded diameter, and the flange is bolted to a flange formed in the exhaust pipe.

전술한 바와 같은 구성을 갖는 본 발명은 배기파이프에 직접적으로 연결되는 구조를 가지므로 머플러 각각에서 배기가스의 유동량을 제어하는 종래 구조와 대비하여 생산원가를 낮출 수 있으며, (밸브의 장착공간 때문에 크기가 제한되지 않으므로) 머플러 하우징의 크기를 더 증대시킬 수 있다.The present invention having the configuration as described above has a structure directly connected to the exhaust pipe, so it is possible to lower the production cost compared to the conventional structure in which the flow amount of exhaust gas is controlled by each muffler (size due to the mounting space of the valve) is not limited), so the size of the muffler housing can be further increased.

아울러, 종래의 구조에서는 밸브가 머플러의 후방 출구부에 장착되어 음압감쇠 및 배압제어를 담당하였지만, 본 발명의 구조에서는 밸브의 위치를 보다 더 차량의 전방쪽으로 이동시킬 수 있으므로 감쇄효율을 더욱 증대시킬 수 있다(즉, 맥동 압력파가 최대치로 발생하는 위치에 장착하여 소음감쇄효율을 극대화 시킬 수 있다).In addition, in the conventional structure, the valve is mounted on the rear outlet of the muffler to control the negative pressure and back pressure. (i.e., it is possible to maximize the noise attenuation efficiency by installing it at the position where the pulsating pressure wave is generated at the maximum value).

또한, 차량의 급가속시 밸브가 열림에 따라 다이나믹한 배기음질을 생성하고 동력성능을 증대시킬 수 있으며, 완만한 가속시에는 밸브 게이트의 개도량이 작아짐과 동시에 공명챔버에 의해 배기소음을 감소시킴으로써 정숙한 배기음질을 구현할 수 있다.
In addition, as the valve is opened during rapid acceleration of the vehicle, dynamic exhaust sound quality can be generated and power performance can be increased. One exhaust sound quality can be realized.

도 1 은 종래 구조에 따른 머플러의 단면모습이 도시된 도면,
도 2 는 본 발명의 바람직한 실시예에 따른 차량용 배기장치가 배기파이프에 장착된 모습과 확대된 모습을 도시한 도면,
도 3 은 본 발명의 실시예에 따른 밸브의 사시도,
도 4a 는 밸브가 닫혔을 때의 모습을 도시한 도면,
도 4b 는 밸브가 개방됐을 때의 모습을 도시한 도면.1 is a view showing a cross-sectional view of a muffler according to a conventional structure;
2 is a view showing a state in which an exhaust device for a vehicle according to a preferred embodiment of the present invention is mounted on an exhaust pipe and an enlarged state;
3 is a perspective view of a valve according to an embodiment of the present invention;
Figure 4a is a view showing a state when the valve is closed;
Figure 4b is a view showing a state when the valve is opened.

본 발명은 배기가스의 유동 시 소음을 저감시키도록 배기파이프에 연결되는 차량용 배기장치에 관한 것으로써, 이하 도면을 참조하여 본 발명의 바람직한 실시예를 더욱 상세히 설명한다.The present invention relates to an exhaust device for a vehicle connected to an exhaust pipe so as to reduce noise during the flow of exhaust gas, and a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

본 발명의 배기장치(100)는 머플러에 장착되던 종래 구조와는 달리 도 2 에 도시된 바와 같이, 배기파이프(50: 50a, 50b)에 직접적으로 장착되되 주파이프(10)에 밸브(20)와 분기파이프(30)가 결합된 상태로 장착이 이뤄진다.The exhaust device 100 of the present invention is directly mounted on the exhaust pipe 50: 50a, 50b as shown in FIG. 2, unlike the conventional structure that was mounted on the muffler, and the valve 20 on the main pipe 10 and the branch pipe 30 are mounted in a coupled state.

상기 주파이프(10)는 엔진측 배기파이프(50a)와 머플러측 배기파이프(50b) 사이에 장착되어 배기가스가 일단에 형성된 유입구를 통해 유입되고 타단에 형성된 배출구를 통해 배출되며, 상기 유입구와 배출구 사이에서 내경이 확장된 공명챔버(11)가 형성된다. The main pipe 10 is mounted between the engine-side exhaust pipe 50a and the muffler-side exhaust pipe 50b so that exhaust gas flows in through an inlet formed at one end and discharged through an outlet formed at the other end, the inlet and the outlet A resonance chamber 11 with an expanded inner diameter is formed therebetween.

그리고, 상기 밸브(20)는 주파이프(10)의 후방쪽에 장착되어 주파이프(10)로 유입된 배기가스의 유동을 허용 또는 차단하도록 개폐가 이뤄진다. 도 3 에 도시된 바와 같이, 본 발명에 따른 밸브(20)는 모터부(22)에 전원이 인가되면 게이트(21)가 회동하여 개폐가 이뤄지는 전자식 밸브로 구성된다.And, the valve 20 is mounted on the rear side of the main pipe 10 is opened and closed to allow or block the flow of the exhaust gas introduced into the main pipe (10). As shown in FIG. 3 , the valve 20 according to the present invention is configured as an electromagnetic valve that opens and closes by rotating the gate 21 when power is applied to the motor unit 22 .

상기 분기파이프(30)는 밸브(20)가 닫혔을 때 배기가스가 우회하여 주파이프(10)의 배출구로 유동하도록 일단은 주파이프(10)의 유입구측과 개통되고 타단은 주파이프(10)의 배출구측과 개통되도록 장착된다.The branch pipe 30 has one end open with the inlet side of the main pipe 10 and the other end with the main pipe 10 so that the exhaust gas bypasses and flows to the outlet of the main pipe 10 when the valve 20 is closed. It is installed to open with the outlet side of the

한편, 상기 밸브(20)는 게이트(21)가 닫혔을 때 헬름홀츠 공명 현상에 따라 공명챔버(11)가 공명기로써 배기가스의 유동소음을 낮추도록 공명챔버(11)에서 배기가스가 배출되는 출구측을 폐쇄할 수 있는 위치에 장착된다. 그리고, 본 발명의 실시예에서 상기 분기파이프(30)의 직경은 주파이프(10)의 직경보다 작게 형성된다.On the other hand, the valve 20 is an outlet side where the exhaust gas is discharged from the resonance chamber 11 to lower the flow noise of the exhaust gas as the resonance chamber 11 as a resonator according to the Helmholtz resonance phenomenon when the gate 21 is closed. installed in a position where it can be closed. And, in the embodiment of the present invention, the diameter of the branch pipe 30 is formed smaller than the diameter of the main pipe (10).

아울러, 상기 주파이프(10)는 배기파이프(50: 50a, 50b)가 소정의 깊이로 삽입되는 방식으로 결합되거나, 유입구측 끝단 및/또는 배출구측 끝단에는 직경이 확장된 플랜지(40)가 결합되어 배기파이프에 형성된 플랜지와 볼팅체결되는 방식으로 결합이 이뤄진다.In addition, the main pipe 10 is coupled in such a way that the exhaust pipe (50: 50a, 50b) is inserted to a predetermined depth, or a flange 40 with an expanded diameter is coupled to the inlet side end and/or the outlet side end. The coupling is made in such a way that it is bolted to the flange formed in the exhaust pipe.

상기와 같은 구성을 갖는 본 발명의 배기장치(100)는 메인 유로를 형성하는 주파이프(10)에 공명챔버(11)와 밸브(20)가 직렬로 배치되고, 분기파이프(30)가 병렬로 배치된 구조로써, 밸브(20)가 닫히면 상기 공명챔버(11)가 공명기 역할을 하게 하고 밸브(20)가 열리면 주파이프(10) 및 분기파이프(30) 양쪽으로 배기가스가 유동하게되어 배기 저항 감소 효과를 볼 수 있다.In the exhaust device 100 of the present invention having the above configuration, the resonance chamber 11 and the valve 20 are arranged in series in the main pipe 10 forming the main flow path, and the branch pipe 30 is arranged in parallel. As an arrangement structure, when the valve 20 is closed, the resonance chamber 11 serves as a resonator, and when the valve 20 is opened, exhaust gas flows to both the main pipe 10 and the branch pipe 30, thereby reducing exhaust resistance reduction effect can be seen.

즉, 엔진의 아이들(idle) 시 또는 저부하 시에는 도 4a 에 도시된 바와 같이, 단면적이 작은 분기파이프(30)를 통해 배기가스가 유동하게 되며 이때 공명챔버(11)는 소음을 감쇄시키는 저주파 공명기로서 활용되어 발진 부밍(booming)을 감소시킨다. That is, when the engine is idle or at a low load, the exhaust gas flows through the branch pipe 30 having a small cross-sectional area as shown in FIG. 4A, and at this time, the resonance chamber 11 is a low-frequency Used as a resonator to reduce oscillation booming.

그리고, 밸브(20)가 개방되는 엔진의 고부하 시에는 도 4b 에 도시된 바와 같이, 배기가스가 주파이프(10)는 물론 분기파이프로(30)도 통과과능하므로 유동경로 상의 단면적이 증대되어 배기저항을 최소화하여 엔진출력을 극대화시킬 수 있다. And, when the engine with the valve 20 is opened at a high load, as shown in FIG. 4B , the exhaust gas can pass through the branch pipe 30 as well as the main pipe 10, so that the cross-sectional area on the flow path is increased to exhaust the exhaust gas. By minimizing the resistance, the engine output can be maximized.

한편, 본 명세서에 개시된 본 발명의 실시예들은 이해를 돕기 위해 특정 예를 제시한 것에 지나지 않으며, 본 발명의 범위를 한정하고자 하는 것은 아니다. 여기에 개시된 실시예들 이외에도 본 발명의 기술적 사상에 바탕을 둔 다른 변형예들이 실시 가능하다는 것은, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 자명한 것이다.
On the other hand, the embodiments of the present invention disclosed in the present specification are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10 : 주파이프
11 : 공명챔버
20 : 밸브
30 : 분기파이프10: main pipe
11: resonance chamber
20: valve
30: branch pipe

Claims (4)

배기가스의 유동 시 소음을 저감시키도록 배기파이프에 연결되는 차량용 배기장치로써,
배기가스가 일단에 형성된 유입구를 통해 유입되고 타단에 형성된 배출구를 통해 배출되도록 배기파이프에 연결되며, 상기 유입구와 배출구 사이에서 내경이 확장된 공명챔버가 형성된 주파이프;와
상기 주파이프에 장착되어 주파이프로 유입된 배기가스의 유동을 허용 또는 차단하도록 개폐가 이뤄지는 밸브; 및
상기 밸브가 닫혔을 때 배기가스가 우회하여 주파이프의 배출구로 유동하도록 일단은 주파이프의 유입구측과 개통되고 타단은 주파이프의 배출구측과 개통된 분기파이프;를 포함하고,
상기 밸브가 닫혔을 때 헬름홀츠 공명(Helmholtz resonance)에 따라 공명챔버에 의해 배기가스의 유동소음이 낮춰지도록 상기 밸브는 공명챔버에서 배기가스가 배출되는 출구측을 폐쇄할 수 있는 위치에 장착되고,
상기 주파이프에 공명챔버와 밸브가 직렬로 배치되고, 분기파이프가 주파이프에 병렬로 배치되고, 상기 밸브가 닫히면 상기 공명챔버가 공명기 역할을 하고, 상기 밸브가 열리면 주파이프 및 분기파이프 양쪽으로 배기가스가 유동하는 구성을 특징으로 하는 차량용 배기장치.
As an exhaust device for a vehicle connected to an exhaust pipe to reduce noise when exhaust gas flows,
A main pipe connected to the exhaust pipe so that the exhaust gas is introduced through an inlet formed at one end and discharged through an outlet formed at the other end, and a resonance chamber with an expanded inner diameter is formed between the inlet and the outlet; and
a valve mounted on the main pipe to open and close to allow or block the flow of exhaust gas introduced into the main pipe; and
and a branch pipe having one end open with the inlet side of the main pipe and the other end with the outlet side of the main pipe so that the exhaust gas bypasses and flows to the outlet of the main pipe when the valve is closed;
When the valve is closed, the valve is mounted in a position that can close the outlet side from which the exhaust gas is discharged from the resonance chamber so that the flow noise of the exhaust gas is lowered by the resonance chamber according to the Helmholtz resonance,
A resonance chamber and a valve are disposed in the main pipe in series, and a branch pipe is disposed in parallel with the main pipe, and when the valve is closed, the resonance chamber acts as a resonator, and when the valve is opened, exhaust to both the main pipe and the branch pipe An exhaust system for a vehicle, characterized in that the gas flows.
 삭제delete 제 1 항에 있어서, 상기 밸브는 전원인가에 따라 개폐가 제어되는 전자식 밸브인 것을 특징으로 하는 차량용 배기장치.
The exhaust system for a vehicle according to claim 1, wherein the valve is an electromagnetic valve whose opening and closing is controlled according to the application of power.
 제 1 항 또는 제 3 항에 있어서, 상기 분기파이프의 직경은 주파이프의 직경보다 작게 형성된 것을 특징으로 하는 차량용 배기장치.The exhaust system for a vehicle according to claim 1 or 3, wherein a diameter of the branch pipe is smaller than a diameter of the main pipe.
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JP2005307947A (en) 2004-04-26 2005-11-04 Yanmar Co Ltd Exhaust pipe structure for internal combustion engine
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JP2005307947A (en) 2004-04-26 2005-11-04 Yanmar Co Ltd Exhaust pipe structure for internal combustion engine
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