Passive muffler for low pass frequencies
    2.
    发明授权
    Passive muffler for low pass frequencies 失效
    被动消声器用于低通频率

    公开(公告)号:US5200582A

    公开(公告)日:1993-04-06

    申请号:US752009

    申请日:1991-08-29

    Abstract: This invention relates to sound attenuating mufflers, and more particularly to sound attenuating mufflers for dampening sound waves of various frequencies above a pre-selected cut-off frequency. Specially positioned acoustical insulation is provided to partially attenuate sound waves of a relatively low frequency. The insulation is carried in a chamber having one dimension of sound wave travel on the order of one-tenth the wavelength of a preselected cutoff frequency above which sound attenuation is desired. An adjacent chamber substantially free of insulation has one dimension of sound wave travel on the order of one-quarter wavelength of the cutoff frequency.

    Abstract translation: 本发明涉及声音衰减消音器,更具体地说,涉及用于衰减高于预先选择的截止频率的各种频率的声波的声衰减消音器。 提供特别定位的声学绝缘以部分地衰减相对较低频率的声波。 隔离层承载在具有声波行进的一个维度的室中,其预期选择的截止频率的波长的十分之一是要求衰减的频率。 基本上没有绝缘的相邻腔室具有大约四分之一波长的截止频率的声波行进的一个维度。

    Auxiliary air injector assembly
    3.
    发明授权
    Auxiliary air injector assembly 失效
    辅助进气组件

    公开(公告)号:US4655035A

    公开(公告)日:1987-04-07

    申请号:US754822

    申请日:1985-07-12

    CPC classification number: F01N3/30 F01N2270/04 F01N3/28 Y02T10/20

    Abstract: An auxiliary air injector assembly comprises an injector fitting that is held in place in a hole in an exhaust pipe by the end of an air flow tube that is clamped against it by a saddle clamp extending around the exhaust pipe.

    Abstract translation: 辅助空气喷射器组件包括喷射器配件,该喷射器配件通过气流管的端部保持在排气管的孔中,该空气流动管的端部通过围绕排气管延伸的鞍座夹紧件抵靠在其上。

    Catalytic converter for motor vehicles
    4.
    发明授权
    Catalytic converter for motor vehicles 失效
    汽车用催化转化器

    公开(公告)号:US5482681A

    公开(公告)日:1996-01-09

    申请号:US754042

    申请日:1991-09-03

    Abstract: An aftermarket catalytic converter for motor vehicle exhaust gas systems has a clamshell housing with an upper heat shield and stainless steel inlet and outlet bushings and contains a catalyst coated substrate cushioned and supported inside of it by a heat expandable mat, the features and parts of the converter being constructed and arranged to enable one converter construction to be used as a replacement converter in a substantial number of different applications for the original equipment converters.

    Abstract translation: 用于机动车排气系统的售后催化转化器具有蛤壳式壳体,其具有上隔热罩和不锈钢入口和出口衬套,并且包含通过热膨胀垫缓冲并支撑在其内的催化剂涂覆的基底,其特征和部件 转换器被构造和布置成使得一个转换器结构能够用作原始设备转换器的大量不同应用中的替换转换器。

    Broad band low frequency passive muffler
    5.
    发明授权
    Broad band low frequency passive muffler 失效
    宽带低频无源消声器

    公开(公告)号:US5350888A

    公开(公告)日:1994-09-27

    申请号:US168574

    申请日:1993-12-16

    Abstract: A sound absorbing muffler used to attenuate noise carried by the exhaust gases of an internal combustion engine includes a straight-through flow tube of cross-section having no baffles or flow reversals. The muffler utilizes both reactive and dissipative components and includes an outer annular resonating chamber and an inner sound absorbing chamber. The muffler's configuration produces effective broad band noise attenuation even at lower frequencies, yet low backpressure.

    Abstract translation: 用于衰减内燃机废气携带的噪声的吸声消音器包括没有挡板或流动反转的横截面的直通流管。 消声器利用无功和耗散部件,并且包括外环形谐振室和内吸声室。 消声器的配置即使在较低的频率下也能产生有效的宽带噪声衰减,但是背压低。

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