CN106523098A - 一种减少汽车三元催化器噪音的方法 - Google Patents

一种减少汽车三元催化器噪音的方法 Download PDF

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Publication number
CN106523098A
CN106523098A CN201610989355.7A CN201610989355A CN106523098A CN 106523098 A CN106523098 A CN 106523098A CN 201610989355 A CN201610989355 A CN 201610989355A CN 106523098 A CN106523098 A CN 106523098A
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China
Prior art keywords
catalytic converter
way catalytic
noise
automobile
carriers
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CN201610989355.7A
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English (en)
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张达明
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Wuxi Mingsheng Strong Blower Co Ltd
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Wuxi Mingsheng Strong Blower Co Ltd
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Priority to CN201610989355.7A priority Critical patent/CN106523098A/zh
Publication of CN106523098A publication Critical patent/CN106523098A/zh
Pending legal-status Critical Current

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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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)

Abstract

本发明公开了一种减少汽车三元催化器噪音的方法，所述方法将三元催化器中催化剂载体做成W型，其顺序堆叠形成完整载体，所述载体在三元催化器中分为至少2段，每段之间间隔20‑40mm，所述载体的孔隙率介于20％‑30％之间。本发明通过在三元催化器中设置特定结构的载体，并设置特定的间隙，使得尾气在流经三元催化器时，能够降低声音，从而使得所述三元催化器兼具***的作用，可以在排气管路中省略***。

Description

一种减少汽车三元催化器噪音的方法
技术领域
本发明涉及汽车降噪技术领域，尤其涉及一种减少汽车三元催化器噪音的方法。
背景技术
汽车的交通噪声是城市噪声污染的主要来源，其中排气噪声是汽车的主要噪声来源。排气噪声的主要来源有：排气管道辐射的辐射噪声，***壁面辐射的壳体噪声，排气尾管出口气流放射声及***连接部分存在缝隙导致的泄漏声。
排气***安装于排气***中，既能使汽车发动机排气脉动减少，又能使排气噪声降低。排气***按照消声机理叫分为阻性***、抗性***和两者结合的阻抗复合式***三类。阻式***利用***内的吸声材料成吸声结构，使沿管道传播的噪卢随传播距离的增加而被吸收，从而衰减能量,达到消声的目的。抗式***是借助管道截面的突然扩大和收缩，或旁接共振腔，使沿管道传播的噪声在突变处向声源反射冋去，而不穿过***，以此达到消声的目的。。阻抗复合式***兼具二者的特点，可在较宽频率范围内获得较高的消声量。
***总容积与发动机排量的比值在3-5之间，由于小型汽车排气管短，三元催化器安装空间非常小，限制了排气管部件的安装。同时，由于低背压排气***的广泛使用，多个部件安装于排气管中，势必引起排气背压的提升。鉴于此原因，安装三元催化器之后，如果汽油机不安装***，可以有效降低排气被压，改善内燃机性能，并使安装空间缩小。
因此三元催化剂兼具降噪能力，是本领域发展的热点。
发明内容
本发明的目的在于提出减少汽车三元催化器噪音的方法，能够使得三元催化器兼具***的作用，从而排气管路上无需安装***。
为达此目的，本发明采用以下技术方案：
一种减少汽车三元催化器噪音的方法，所述方法将三元催化器中催化剂载体做成W型，其顺序堆叠形成完整载体，所述载体在三元催化器中分为至少2段，每段之间间隔20-40mm，所述载体的孔隙率介于20％-30％之间。
本发明通过将载体设置成W型并顺序堆叠，W型的V型侧面迎向排气方向，因此排气需穿过W型载体的4个侧面，同时，由于所述载体具有孔隙率，其侧面上分布有小孔，排气在穿过遍布小孔的W侧面时，速度逐渐减小，摩擦损失逐渐增大，使得声音逐渐降低。
在本发明的三元催化器中，载体不是呈一体放置，而是存在间隔，形成空腔。这是因为载体同时具有阻性和抗性消声机理，载体之间的空腔相当于形成一个膨胀腔，从而具有抗性消声作用。
本发明通过在三元催化器中设置特定结构的载体，并设置特定的间隙，使得尾气在流经三元催化器时，能够降低声音，从而使得所述三元催化器兼具***的作用，可以在排气管路中省略***。
具体实施方式
实施例1
一种减少汽车三元催化器噪音的方法，所述方法将三元催化器中催化剂载体做成W型，其顺序堆叠形成完整载体，所述载体在三元催化器中分为2段，每段之间间隔20mm，所述载体的孔隙率为20％。
实施例2
一种减少汽车三元催化器噪音的方法，所述方法将三元催化器中催化剂载体做成W型，其顺序堆叠形成完整载体，所述载体在三元催化器中分为4段，每段之间间隔20mm，所述载体的孔隙率为30％。
经过检测，在排气管路上安装所述三元催化器并取消***后，其噪音不超过62dB，完全符合法律法规的要求。

Claims (1)

1.一种减少汽车三元催化器噪音的方法，所述方法将三元催化器中催化剂载体做成W型，其顺序堆叠形成完整载体，所述载体在三元催化器中分为至少2段，每段之间间隔20-40mm，所述载体的孔隙率介于20％-30％之间。
CN201610989355.7A 2016-11-10 2016-11-10 一种减少汽车三元催化器噪音的方法 Pending CN106523098A (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205458A1 (de) * 1992-02-22 1993-08-26 Bosch Gmbh Robert Schalldaempfer fuer geblaese
US5285640A (en) * 1992-07-21 1994-02-15 Olivo John R Integrated post-engine emissions heater, catalytic converter and muffler
CN201326446Y (zh) * 2008-09-08 2009-10-14 奇瑞汽车股份有限公司 一种新型三元催化器载体
CN202431342U (zh) * 2011-12-20 2012-09-12 郑州精益达汽车零部件有限公司 车用三元催化转化器
CN203796372U (zh) * 2013-10-24 2014-08-27 洛阳市华宝非金属材料有限公司 一种三元催化器载体结构
CN204511591U (zh) * 2015-01-29 2015-07-29 辽宁石油化工大学 一种耦合型汽车三元催化器
CN105649717A (zh) * 2016-01-25 2016-06-08 山西振华创新科技有限公司 汽车尾气净化器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205458A1 (de) * 1992-02-22 1993-08-26 Bosch Gmbh Robert Schalldaempfer fuer geblaese
US5285640A (en) * 1992-07-21 1994-02-15 Olivo John R Integrated post-engine emissions heater, catalytic converter and muffler
CN201326446Y (zh) * 2008-09-08 2009-10-14 奇瑞汽车股份有限公司 一种新型三元催化器载体
CN202431342U (zh) * 2011-12-20 2012-09-12 郑州精益达汽车零部件有限公司 车用三元催化转化器
CN203796372U (zh) * 2013-10-24 2014-08-27 洛阳市华宝非金属材料有限公司 一种三元催化器载体结构
CN204511591U (zh) * 2015-01-29 2015-07-29 辽宁石油化工大学 一种耦合型汽车三元催化器
CN105649717A (zh) * 2016-01-25 2016-06-08 山西振华创新科技有限公司 汽车尾气净化器

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Application publication date: 20170322