KR20120033418A - Noise reducing device for a turbo charger - Google Patents

Noise reducing device for a turbo charger Download PDF

Info

Publication number
KR20120033418A
KR20120033418A KR1020100094918A KR20100094918A KR20120033418A KR 20120033418 A KR20120033418 A KR 20120033418A KR 1020100094918 A KR1020100094918 A KR 1020100094918A KR 20100094918 A KR20100094918 A KR 20100094918A KR 20120033418 A KR20120033418 A KR 20120033418A
Authority
KR
South Korea
Prior art keywords
resonator
turbocharger
noise
turbo charger
compressor housing
Prior art date
Application number
KR1020100094918A
Other languages
Korean (ko)
Other versions
KR101172191B1 (en
Inventor
윤성일
Original Assignee
현대자동차주식회사
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사, 기아자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020100094918A priority Critical patent/KR101172191B1/en
Publication of KR20120033418A publication Critical patent/KR20120033418A/en
Application granted granted Critical
Publication of KR101172191B1 publication Critical patent/KR101172191B1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14—Combined air cleaners and silencers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Supercharger (AREA)

Abstract

PURPOSE: A device for reducing the noise of a turbo charger is provided to prevent noise from a shearing hose of a resonator without changing the arrangement of engine components and reduce an air flow from a bent by forming a resonance part to the bent. CONSTITUTION: A device for reducing turbo charger sound comprises a turbo charger(110) and a resonator(120). The turbo charger supplies intake air flowing through an air cleaner to an engine. A resonator attached to the turbo charger reduces operating noises. The resonator is directly fixed to a compressor housing of the turbo charger. The resonator is made of synthetic resin and has a flange part which is fastened to the compressor housing with a bolt.

Description

터보차저 소음 감쇄장치{Noise reducing device for a turbo charger}Noise reduction device for a turbo charger

본 발명은 터보차저 소음 감쇄장치에 관한 것으로, 특히 터보차저의 소음 저감 기능을 현저히 높이면서도 상품성을 높일 수 있는 터보차저 소음 감쇄장치에 관한 것이다.
The present invention relates to a turbocharger noise attenuation device, and more particularly, to a turbocharger noise attenuation device capable of significantly improving the noise reduction function of the turbocharger and increasing the commercialization.

일반적으로 디젤엔진에는 엔진으로 공급되는 흡기를 과급하기 위한 터보차저가 설치된다. 터보차저는 연소가 양호하여 연료소비 감소에 의한 연비향상과 엔진 출력을 증대시킬 수 있으며, 압력 초기에 압축 압력이 높아 착화지연 시간을 짧게 할 수 있으며, 엔진의 소형 경량화 등의 장점이 있다.In general, a diesel engine is provided with a turbocharger for supercharging the intake air supplied to the engine. The turbocharger can improve fuel efficiency and increase engine output by reducing fuel consumption due to good combustion, shorten ignition delay time due to high compression pressure at the initial stage of pressure, and have advantages such as compact and lightweight engine.

그러나, 터보차저는 구동 시에 고주파 대역의 소음이 발생하며, 터보차저의 작동 소음에 의해 운전자에게 큰 소음으로 작용하여 차량 승차감을 저하시키고 전체적으로 차량의 상품성을 떨어뜨리는 문제점이 발생한다. 따라서, 터보차저에는 작동 소음을 저감하기 위한 소음 감쇄장치로서 레조네이터(resonator)가 함께 설치가 된다.However, the turbocharger generates noise of a high frequency band during driving, and acts as a loud noise to the driver due to the operation noise of the turbocharger, thereby degrading the ride comfort of the vehicle and degrading the merchandise of the vehicle as a whole. Therefore, a turbocharger is provided with a resonator as a noise attenuator for reducing operating noise.

이하에서는 일반적인 터보차저와 레조네이터를 간략히 살펴본다. 도 1은 일반적으로 디젤엔진에 설치되는 터보차저의 구성을 간략히 설명하기 위한 도면이다.The following briefly looks at the general turbocharger and resonator. 1 is a view for briefly explaining the configuration of a turbocharger generally installed in a diesel engine.

도 1을 참고하면, 디젤엔진에는 엔진으로 공급되는 흡기 중에 이물질을 여과하기 위한 에어크리너(10)와, 엔진의 배기매니폴드(22)에서 배기되는 배기압을 이용하여 에어크리너(10)를 통과한 흡기를 엔진으로 과급하기 위한 터보차저(30)와, 터보차저(30)에서 과급된 흡기를 냉각시켜 엔진의 흡기매니폴드(21) 측으로 공급하기 위한 인터쿨러(40)가 구비된다.Referring to FIG. 1, the diesel engine passes through the air cleaner 10 using an air cleaner 10 for filtering foreign substances in the intake air supplied to the engine, and an exhaust pressure exhausted from the exhaust manifold 22 of the engine. A turbocharger 30 for supercharging one intake air to the engine and an intercooler 40 for cooling the intake supercharged by the turbocharger 30 to supply the intake manifold 21 side of the engine are provided.

터보차저(30)는 엔진의 배기매니폴드(22)로부터 배출되는 배기압에 의해 구동되는 터빈(31)과, 이 터빈(31)에 의해 회전 구동되어 에어크리너(10)를 통과한 흡기를 압축하게 되는 콤프레서(32)로 구성된다.The turbocharger 30 is compressed by the turbine 31 driven by the exhaust pressure discharged from the exhaust manifold 22 of the engine, and the intake air that is rotationally driven by the turbine 31 and passed through the air cleaner 10. Compressor 32 is composed of.

한편, 터보차저(30)에서 작동소음을 저감하기 위하여 인터쿨러(40)와 연결되는 호스(51)(52) 사이에 레조네이터(50)가 설치된다. 레조네이터(50)는 터보차저에서 압축된 공기가 터보차저 콤프레서 휠을 통과하면서 발생되는 불균일한 맥동에 의한 맥동압력을 낮추어 소음을 개선하게 된다.On the other hand, the resonator 50 is installed between the hoses 51 and 52 connected to the intercooler 40 in order to reduce operating noise in the turbocharger 30. The resonator 50 improves noise by lowering pulsation pressure due to uneven pulsation generated when air compressed in the turbocharger passes through the turbocharger compressor wheel.

그러나, 이와 같이 터보차저와 인터쿨러 사이에 호스로 연결되는 레조네이터는 공기 맥동음이 호스를 통해 외부로 분출되어 날카로운 소음 발생(휘슬음)의 원인이 된다. 이를 개선하기 위하여 호스 외부에 패드를 설치하는 경우가 있으나 이러한 패드는 근본적인 소음 저감기능을 하지는 못하고 있다.
However, the resonator connected by the hose between the turbocharger and the intercooler as described above causes air pulsation to blow out to the outside through the hose, causing sharp noise (whistling). In order to improve this, there are cases where pads are installed outside the hose, but these pads do not have a fundamental noise reduction function.

본 발명은 상기의 문제점을 해결하기 위한 것으로, 터보차저와 호스로 조립되는 레조네이터의 설치구조를 개선하여 터보차저의 작동소음을 저감하면서도 조립성과 제품단가를 저감하여 전체적으로 상품성을 높일 수 있는 터보차저 소음 감쇄장치를 제공하고자 한다.
The present invention is to solve the above problems, by improving the installation structure of the resonator assembled by the turbocharger and the hose turbocharger noise that can improve the overall marketability by reducing the assembly noise and product cost while reducing the operation noise of the turbocharger To provide an attenuation device.

본 발명의 터보차저 소음 감쇄장치는 에어크리너를 경유한 흡기를 엔진으로 과급하기 터보차저와; 상기 터보차저에 구비되어 작동소음을 저감하게 되는 레조네이터를 포함하되, 상기 레조네이터는 상기 터보차저의 콤프레서 하우징에 직접 고정됨으로써 제공될 수 있다.
The turbocharger noise damping device of the present invention includes: a turbocharger for supercharging intake air via an air cleaner to an engine; It includes a resonator provided in the turbocharger to reduce the operating noise, the resonator may be provided by being directly fixed to the compressor housing of the turbocharger.

본 발명의 터보차저 소음 감쇄장치는 터보차저에 구비되어 작동소음을 저감하기 위한 합성수지를 재질로 하는 레조네이터가 터보차저의 콤프레서 하우징과 직결 조립함으로써, 엔진 주변 부품 배치를 변경하지 않으면서도 레조네이터 전단 호스에서 발생될 수 있었던 소음을 방지할 수가 있는 효과가 있다.The turbocharger noise attenuation apparatus of the present invention is provided in a turbocharger, and a resonator made of a synthetic resin material for reducing operating noise is directly assembled with the compressor housing of the turbocharger, so that the resonator front hose is not changed without changing the arrangement of parts around the engine. There is an effect that can prevent the noise that could be generated.

또한, 본 발명의 터보차저 소음 감쇄장치는 레조네이터에 굴곡부를 갖되, 급격한 형상 변경이 이루어지게 되는 굴곡부까지 공명 영역을 형성함으로써 굴곡부에서 발생할 수 있는 기류음(air flow)을 저감할 수 있는 효과가 있다.
In addition, the turbocharger noise attenuation apparatus of the present invention has the bent portion in the resonator, there is an effect that can reduce the air flow (air flow) that may occur in the bent portion by forming a resonance region to the bent portion to be made a sudden shape change. .

도 1은 일반적으로 디젤엔진에 설치되는 터보차저의 구성을 간략히 설명하기 위한 도면,
도 2는 본 발명의 터보차저 소음 감쇄장치의 바람직한 실시예를 설명하기 위한 도면,
도 3은 본 발명의 터보차저 소음 감쇄장치의 다른 실시예를 설명하기 위한 도면,
도 4는 도 3의 종단면도.1 is a view for briefly explaining the configuration of a turbocharger generally installed in a diesel engine,
2 is a view for explaining a preferred embodiment of the turbocharger noise reduction device of the present invention,
3 is a view for explaining another embodiment of the turbocharger noise reduction device of the present invention;
4 is a longitudinal cross-sectional view of FIG.

이하, 본 발명의 실시예를 첨부 도면을 참조하여 상세히 설명하면 다음과 같다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2를 참고하면, 본 발명의 터보차저 소음 감쇄장치는 에어크리너를 경유한 흡기를 엔진으로 과급하기 터보차저(110)와; 상기 터보차저에 구비되어 작동소음을 저감하게 되는 레조네이터(120)를 포함하되, 상기 레조네이터(120)는 상기 터보차저(110)의 콤프레서 하우징에 직접 고정되는 것을 특징으로 한다.
2, the turbocharger noise attenuation apparatus of the present invention includes a turbocharger 110 for supercharging intake air through an air cleaner to the engine; It includes a resonator 120 is provided in the turbocharger to reduce the operating noise, the resonator 120 is characterized in that it is fixed directly to the compressor housing of the turbocharger (110).

터보차저(110)와 고정이 이루어지는 레조네이터(120) 일단에는 플랜지부(121)가 형성되며, 터보차저(110)의 콤프레서 하우징(111)에는 레조네이터(120)의 플랜지부(121)와 조립이 이루어지도록 플랜지(112)가 형성되어 레조네이터(120)는 콤프레서 하우징(111)과 볼트(122)에 의해 고정이 된다.A flange portion 121 is formed at one end of the resonator 120 to which the turbocharger 110 is fixed, and the compressor housing 111 of the turbocharger 110 is assembled with the flange portion 121 of the resonator 120. The flange 112 is formed so that the resonator 120 is fixed by the compressor housing 111 and the bolt 122.

도면부호 124는 레조네이터(120)와 호스(123)를 고정하기 위한 클램핑부재이며, 호스(120)는 인터쿨러와 연결된다.Reference numeral 124 is a clamping member for fixing the resonator 120 and the hose 123, the hose 120 is connected to the intercooler.

상기 플랜지부(121)는 콤프레서 하우징(111)과 사이에 O링과 같은 탄성 기밀부재가 추가 구비되는 것이 바람직할 것이다.The flange portion 121 may be further provided with an elastic airtight member such as an O ring between the compressor housing 111.

본 발명의 터보차저 소음 감쇄장치에 있어서, 레조네이터는 합성수지의 사출 성형에 의해 제작되는 것이 바람직하다. 따라서, 제작이 용이하여 엔진 주변 부품의 배치를 변경하지 않으면서도 터보차저의 후단에 연결되었던 호스를 배제함으로써 작동소음 저감이 가능하다.
In the turbocharger noise reduction device of the present invention, the resonator is preferably manufactured by injection molding of a synthetic resin. Therefore, it is easy to manufacture and it is possible to reduce the operation noise by excluding the hose connected to the rear end of the turbocharger without changing the arrangement of the engine peripheral parts.

보다 바람직하게는 본 발명에 있어 레조네이터의 재질을 합성수지로 사용하는 경우에 밀도 저하와 같은 합성수지 재질에 의해 굴곡부에서 기류음(air flow) 발생을 방지할 수 있도록 레조네이터의 굴곡부에도 소음을 저감하기 위한 공명수단을 추가할 수가 있다.More preferably, in the present invention, when using the material of the resonator as a synthetic resin, the resonance for reducing the noise in the bent portion of the resonator so as to prevent the generation of air flow in the bent portion by the synthetic resin material such as density reduction You can add a means.

구체적으로 도 3 및 도 4를 참고하면, 본 발명에 있어서 레조네이터(120)는 굽은 굴곡부(120b)를 갖되, 이 굴곡부(120b)의 내벽에는 다수의 통공(a)과 공명챔버(b)를 갖는 것을 특징으로 한다.Specifically, referring to FIGS. 3 and 4, in the present invention, the resonator 120 has a curved bent portion 120b, and the inner wall of the curved portion 120b has a plurality of through holes a and a resonance chamber b. It is characterized by.

본 발명에 있어 레조네이터(120)는 직선관 형태의 내벽에 다수의 통공(a)과 그 주변을 감싸는 공명챔버(b)로 이루어진 메인 레조네이터(120a)와 함께 터보차저와 직결을 위하여 굴곡부(120b)를 갖되, 이 굴곡부(120b)의 내벽 역시도 다수의 통공(a)과 공명챔버(b)를 갖도록 함으로써, 굴곡부(120b) 구간에서 발생할 수 있는 기류음 발생을 감소시킬 수가 있다.
In the present invention, the resonator 120 has a bent portion 120b for direct connection with a turbocharger together with a main resonator 120a formed of a plurality of through holes (a) and a resonance chamber (b) surrounding the periphery of the straight tube-shaped inner wall. Although the inner wall of the curved portion 120b also has a plurality of through holes (a) and the resonance chamber (b), it is possible to reduce the generation of airflow sound that can occur in the curved portion (120b) section.

이와 같은 본 발명의 터보차저 소음 감쇄장치는 터보차저에 구비되어 작동소음을 저감하기 위한 합성수지 재질의 레조네이터를 콤프레서 하우징과 직결 조립함으로써, 엔진 주변 부품 배치를 변경하지 않으면서도 레조네이터 전단 호스에서 발생될 수 있었던 소음을 방지할 수 있다.The turbocharger noise attenuation device of the present invention is provided in the turbocharger and directly assembled with the compressor housing to reduce the operation noise of the synthetic resin material, so that it can be generated in the resonator front hose without changing the arrangement of parts around the engine. You can prevent the noise.

또한, 본 발명의 터보차저 소음 감쇄장치는 레조네이터에 굴곡부를 갖되, 급격한 형상 변경이 이루어지게 되는 굴곡부까지 공명 영역을 형성함으로써 굴곡부에서 발생할 수 있는 기류음 발생을 최소화할 수 있다.
In addition, the turbocharger noise attenuation apparatus of the present invention may have a bent portion in the resonator, thereby minimizing the generation of airflow noise that may occur in the bent portion by forming a resonance region up to the bent portion to be made a sharp shape change.

상기 실시예는 본 발명의 기술적 사상을 구체적으로 설명하기 위한 일례로서, 본 발명의 범위는 상기의 도면이나 실시예에 한정되지 않는다.
The above embodiment is an example for explaining the technical idea of the present invention in detail, and the scope of the present invention is not limited to the above drawings and embodiments.

110 : 터보차저 111 : 하우징
120 : 레조네이터 121 : 플랜지부110: turbocharger 111: housing
120: resonator 121: flange portion

Claims (5)

에어크리너를 경유한 흡기를 엔진으로 과급하기 터보차저와;
상기 터보차저에 구비되어 작동소음을 저감하게 되는 레조네이터를 포함하되, 상기 레조네이터는 상기 터보차저의 콤프레서 하우징에 직접 고정되는 것을 특징으로 하는 터보차저 소음 감쇄장치.Supercharging the intake air via the air cleaner to the engine;
And a resonator provided in the turbocharger to reduce operating noise, wherein the resonator is fixed directly to the compressor housing of the turbocharger. 제1항에 있어서, 상기 레조네이터의 재질은 합성수지인 것을 특징으로 하는 터보차저 소음 감쇄장치.The turbocharger noise attenuation device according to claim 1, wherein the resonator is made of synthetic resin. 제1항에 있어서, 상기 레조네이터는 상기 콤프레서 하우징과 조립되는 플랜지부가 형성되어 볼트 조립되는 것을 특징으로 하는 터보차저 소음 감쇄장치.The turbocharger noise attenuation device according to claim 1, wherein the resonator is bolt-assembled with a flange part assembled with the compressor housing. 제3항에 있어서, 상기 플랜지부는 상기 콤프레서 하우징과 사이에 탄성 기밀부재가 추가 구비되는 것을 특징으로 하는 터보차저 소음 감쇄장치.4. The turbocharger noise attenuation device according to claim 3, wherein the flange part further includes an elastic airtight member between the compressor housing and the compressor housing. 제1항에 있어서, 상기 레조네이터는 굽은 굴곡부를 갖되, 이 굴곡부의 내벽에는 다수의 통공과 공명챔버를 갖는 것을 특징으로 하는 터보차저 소음 감쇄장치.2. The turbocharger noise attenuation device according to claim 1, wherein the resonator has a curved bent portion, and the inner wall of the bent portion has a plurality of through holes and a resonance chamber.
KR1020100094918A 2010-09-30 2010-09-30 Noise reducing device for a turbo charger KR101172191B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100094918A KR101172191B1 (en) 2010-09-30 2010-09-30 Noise reducing device for a turbo charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100094918A KR101172191B1 (en) 2010-09-30 2010-09-30 Noise reducing device for a turbo charger

Publications (2)

Publication Number Publication Date
KR20120033418A true KR20120033418A (en) 2012-04-09
KR101172191B1 KR101172191B1 (en) 2012-08-07

Family

ID=46136179

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100094918A KR101172191B1 (en) 2010-09-30 2010-09-30 Noise reducing device for a turbo charger

Country Status (1)

Country Link
KR (1) KR101172191B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210039083A (en) 2019-10-01 2021-04-09 현대자동차주식회사 Turbo charger

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017171316A2 (en) * 2016-03-28 2017-10-05 엘에스엠트론 주식회사 Noise reduction device for vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818874C2 (en) * 1998-04-28 2001-06-07 Man B & W Diesel As Kopenhagen Reciprocating machine
JP2009108816A (en) 2007-10-31 2009-05-21 Toyoda Gosei Co Ltd Attachment structure for resonator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210039083A (en) 2019-10-01 2021-04-09 현대자동차주식회사 Turbo charger
US11035376B2 (en) 2019-10-01 2021-06-15 Hyundai Motor Company Turbo charger

Also Published As

Publication number Publication date
KR101172191B1 (en) 2012-08-07

Similar Documents

Publication Publication Date Title
US8348012B2 (en) Resonator
US7387188B2 (en) Sound absorber
KR101236635B1 (en) Device for turbocharging an internal combustion engine comprising a pulsation damping chamber
KR102594139B1 (en) Noise reduction device for vehicle
JP2781168B2 (en) Filter muffler
US8689934B2 (en) Sound absorbing structure
JP2005069228A (en) Muffler
US9593612B2 (en) Internal combustion engine
CN203430857U (en) Novel gas compressor volute with noise elimination function
KR101172191B1 (en) Noise reducing device for a turbo charger
CN108331686B (en) Air intake device for internal combustion engine
US11035508B2 (en) Connection structure of turbo charger and intercooler for vehicle
CN104487694A (en) Silencer for supercharger
CN207761850U (en) A kind of supercharging turbine of automobile engine muffler
KR101989544B1 (en) Exhaust-gas turbocharger
CA2346754A1 (en) Air-routing system, particularly intake system of an internal combusion engine
GB2365066A (en) Noise attenuation arrangements for pressurised-gas conduits
CN2871858Y (en) Silencer for automobile
CN203717275U (en) Noise elimination element
CN201794836U (en) Muffler for turbocharger
CN102168607A (en) Inter-cooling integral volute
CN206830296U (en) Through type muffler
KR101714325B1 (en) Apparatus for reduction of fuel consumption and of exhaust gas generation
CN201347783Y (en) Composite type exhausting silencer
KR101610073B1 (en) Air cleaner for reducing air current noise of turbo-charger engine

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20150731

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20160729

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20180730

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20190729

Year of fee payment: 8