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    • 1. 发明授权
    • Engine noise control apparatus
    • 发动机噪声控制装置
    • US5692052A
    • 1997-11-25
    • US235935
    • 1994-05-02
    • Katsuyuki TanakaYoshitaka NishioTokio KohamaSatoshi KameyamaKouzi OharaMasanori Kato
    • Katsuyuki TanakaYoshitaka NishioTokio KohamaSatoshi KameyamaKouzi OharaMasanori Kato
    • F01N1/06G10K11/178A61F11/06H03B29/00
    • G10K11/1788F01N1/065G10K2210/107G10K2210/1282G10K2210/3027G10K2210/3033
    • An engine rotating speed sensor detects intake sound information due to the drive of an engine. A controller generates a signal having a frequency corresponding to a desired ratio of orders based on the detected intake sound information. Further, a phase and an amplitude the signal are controlled, and so a speaker arranged in a propagation path of the intake sound of the engine generates control sound to control the intake sound due to the drive of the engine. An engine noise control apparatus which is capable of effectively reducing or waveform-reshaping a wide range of engine noise. The apparatus has an engine rotating speed sensor for detecting an engine rotating speed and a waveform generator circuit for converting a rotation pulse signal to a periodic signal having a frequency which is a predetermined multiple of the detected engine rotating speed. The output of an air flow meter is passed through a bandpass filter and a reshaping circuit to generate a control signal which is an average value of alternating current components of the output. A CPU, with reference to a map previously stored in a memory, modifies the phase and amplitude of the periodic signal with respect to an engine rotation reference signal based on the rotation pulse signal and the control signal, and outputs the modified signal as driving signals to operate speakers disposed in an intake tube and an exhaust tube for reducing noise.
    • 发动机转速传感器检测由于发动机的驱动引起的进气声音信息。 控制器基于检测到的进气声音信息产生具有与期望的订单比率对应的频率的信号。 此外,控制信号的相位和幅度,因此布置在发动机的进气声音的传播路径中的扬声器产生控制声音,以控制由于发动机的驱动引起的进气声音。 一种发动机噪声控制装置,其能够有效地减小或波形重新形成大范围的发动机噪声。 该装置具有用于检测发动机转速的发动机转速传感器和用于将旋转脉冲信号转换为具有检测到的发动机转速的预定倍数的频率的周期信号的波形发生器电路。 空气流量计的输出通过带通滤波器和整形电路以产生作为输出的交流分量的平均值的控制信号。 CPU参考先前存储在存储器中的映射,基于旋转脉冲信号和控制信号来修改相对于发动机旋转参考信号的周期信号的相位和振幅,并将修改的信号作为驱动信号输出 以操作设置在进气管中的扬声器和用于降低噪音的排气管。
    • 5. 发明授权
    • Intake apparatus for internal combustion engine
    • 内燃机进气装置
    • US4858568A
    • 1989-08-22
    • US218244
    • 1988-07-13
    • Hideki ObayashiYoshitaka NishioTokio KohamaHiroyuki Goto
    • Hideki ObayashiYoshitaka NishioTokio KohamaHiroyuki Goto
    • F02B27/02
    • F02B27/0263F02B27/0215F02B27/0273F02B27/0278F02B27/0294F02M35/10229Y02T10/146
    • An intake apparatus for an internal combustion engine that has a first intake passage communicating with a combustion chamber of the internal combustion engine; a second intake passage which communicates with the combustion chamber of the internal combustion engine and whose length is greater than a length of the first intake passage; a valve for selectively changing over the communication/shutting off of the combustion chamber of the internal combustion engine with/from between the first or/and second intake passages; and a drive circuit for driving the valve to effect the changing over operation. A controller controls the drive circuit, and an air cleaner device introduces clean air into the combustion chamber of the internal combustion engine. The first and second intake passages are disposed inside a case of the air cleaner device, and the valve is disposed at a position which is prevented from interfering the outlet side of the second intake passage when the first intake passage is closed by the valve and the second intake passage is opened by the valve.
    • 一种内燃机的进气装置,具有与内燃机的燃烧室连通的第一进气通路, 第二进气通道,其与内燃机的燃烧室连通并且其长度大于第一进气通道的长度; 用于选择性地在第一或第二进气通道之间切换内燃机的燃烧室的连通/关闭的阀; 以及用于驱动阀以实现切换操作的驱动电路。 控制器控制驱动电路,空气滤清器设备将清洁空气引入内燃机的燃烧室。 第一进气通道和第二进气通道设置在空气滤清器装置的壳体的内部,并且阀设置在当第一进气通道被阀关闭时防止其干扰第二进气通道的出口侧的位置, 第二进气通道被阀打开。