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    • 7. 发明授权
    • Automobile exhaust noise silencer
    • 汽车排噪声消声器
    • US06173808B1
    • 2001-01-16
    • US08857071
    • 1997-05-15
    • Kazushige MaedaAkira SasakiTakao KubozukaHaruki Yashiro
    • Kazushige MaedaAkira SasakiTakao KubozukaHaruki Yashiro
    • F01N100
    • F01N1/084F01N1/02F01N1/166F01N1/24F01N2210/04F01N2490/155
    • An expansion chamber, and first and second volume chambers on either side of said expansion chamber, are formed inside a muffler housing. Engine exhaust is led by an inlet tube to the first volume chamber, and an opening facing the expansion chamber is formed in an intermediate part of the inlet tube. Exhaust in the second volume chamber is discharged outside by a tail tube, and an opening is formed facing the expansion chamber in an intermediate part of the tail tube. A valve is provided for leading exhaust from the first volume chamber to the second volume chamber according to a pressure difference between the chambers. This forms two exhaust flowpaths. A resonance system with two degrees of freedom is thereby formed with respect to exhaust discharged via the two openings and the expansion chamber, and a high noise silencing efficiency is obtained.
    • 膨胀室和位于所述膨胀室两侧的第一和第二容积室形成在消声器壳体的内部。 发动机排气通过入口管引导到第一容积室,并且面向膨胀室的开口形成在入口管的中间部分中。 第二容积室中的排气通过尾管排出到外部,并且在尾管的中间部分中形成面向膨胀室的开口。 提供阀,用于根据室之间的压力差将排气从第一容积室引导到第二容积室。 这形成两个排气流路。 因此,通过两个开口和膨胀室排出的排气形成具有两个自由度的共振系统,并获得高噪声消音效率。
    • 8. 发明申请
    • METHOD AND APPARATUS FOR CONTROLLING ENGINE EXHAUST SOUND FOR VEHICLES
    • 用于控制用于车辆的发动机排气声的方法和装置
    • US20080245605A1
    • 2008-10-09
    • US12059226
    • 2008-03-31
    • Kazushige MaedaAkira Sasaki
    • Kazushige MaedaAkira Sasaki
    • F01N1/00
    • F01N1/166F01N1/084F01N1/089F01N1/168F01N2470/14
    • An exhaust sound controlling method including reducing a flow rate of exhaust gas that passes through an exhaust path, to a first flow rate in accordance with increase in engine speed in a first engine speed region, and increasing the flow rate of exhaust gas to a second flow rate in accordance with increase in engine speed in a second engine speed region higher in engine speed than the first engine speed region. An exhaust sound controlling apparatus including a baffle plate and a valve that is operated to open a communication passage that communicates upstream and downstream sides of the baffle plate in an engine starting region, close the communication passage in an idling region and a low engine speed region, and open the communication passage and increase an opening of the valve as the engine speed rises in a high engine speed region.
    • 一种废气声音控制方法,其包括将通过排气路径的排气的流量减少到根据第一发动机转速区域中的发动机转速的增加的第一流量,并将废气的流量增加到第二流量 根据发动机转速高于第一发动机转速区域的第二发动机转速区域中的发动机转速增加的流量。 一种废气声音控制装置,包括挡板和阀,其操作以打开在发动机起动区域中连通挡板的上游和下游侧的连通通道,将空转区域和低发动机转速区域中的连通通道关闭 并且在高发动机转速区域中随着发动机转速的上升而打开连通通道并增加阀的开度。
    • 9. 发明授权
    • Automobile exhaust noise suppressor
    • 汽车排气噪声抑制器
    • US5739483A
    • 1998-04-14
    • US797332
    • 1997-02-10
    • Haruki YashiroAkira SasakiKazushige Maeda
    • Haruki YashiroAkira SasakiKazushige Maeda
    • F01N1/02F01N1/08F01N1/10F01N1/16F01N1/00
    • F01N1/10F01N1/02F01N1/084F01N1/089F01N1/165F01N1/166F01N2470/14F01N2490/06F01N2490/08F01N2490/155F01N2490/16
    • A first and second noise suppressing mechanism are provided inside the muffler. Each mechanism is provided with a discharge pipe for discharging exhaust gas to outside the muffler. The first noise suppressing mechanism reduces exhaust noise in the low engine speed region. The second noise suppressing mechanism reduces noise in the medium and high engine speed regions. A valve is provided that connects the first noise suppressing mechanism and second noise suppressing mechanism according to the engine exhaust pressure. In the low speed region, the valve is closed and exhaust gas is discharged via the first noise suppressing mechanism where mainly low frequency noise is eliminated. In the medium and high speed regions, the valve is opened and exhaust gas is also discharged via the second noise suppressing mechanism where high frequency noise specific in these regions is also eliminated. Further, by the increased exhaust cross-sectional area, power drop due to increase of back pressure in the muffler in the high speed region, is prevented.
    • 第一和第二噪声抑制机构设置在消音器的内部。 每个机构设置有用于将废气排放到消声器外部的排放管。 第一噪声抑制机构降低了低发动机转速区域中的排气噪声。 第二噪声抑制机构降低中,高发动机转速区域的噪音。 提供一种阀,其根据发动机排气压力连接第一噪声抑制机构和第二噪声抑制机构。 在低速区域中,阀关闭,排气通过主要是低频噪声消除的第一噪声抑制机构排出。 在中高速区域中,阀被打开,废气也通过第二噪声抑制机构排出,其中也消除了这些区域中特有的高频噪声。 此外,通过增加的排气横截面积,防止了由于高速区域中的消声器中的背压增加引起的功率下降。