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公开(公告)号：EP0625773A2
公开(公告)日：1994-11-23
申请号：EP94107760.4
申请日：1994-05-19
发明人： Tanaka, Katsuyuki , Nishio, Yoshitaka , Kohama, Tokio , Kameyama, Satoshi 237, Shiratoriryo, , Ohara, Kouzi , Kato, Masanori
IPC分类号： G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/107 , G10K2210/112 , G10K2210/1282 , G10K2210/12822 , G10K2210/3027 , G10K2210/3032 , G10K2210/3033 , G10K2210/3039 , G10K2210/3046 , G10K2210/51
摘要： 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 (5) for detecting an engine rotating speed and a waveform generator circuit (46) 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 (3) is passed through a bandpass filter (41) and a rectifier circuit (42) to generate a control signal which is an average value of alternating current components of the output. A CPU (44), with reference to a map previously stored in a memory (45), 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 (6A, 6B) disposed in an intake tube and an exhaust tube for reducing noise.
摘要翻译： 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（5）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（46）。 空气流量计（3）的输出通过带通滤波器（41）和整流电路（42），以产生作为输出的交流分量的平均值的控制信号。 参考先前存储在存储器（45）中的映射的CPU（44）基于旋转脉冲信号和控制信号修改相对于发动机旋转参考信号的周期信号的相位和幅度，并且输出 修改的信号作为用于操作设置在进气管中的扬声器（6A，6B）和用于降低噪声的排气管的驱动信号。
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公开(公告)号：EP0625773A3
公开(公告)日：1995-10-18
申请号：EP94107760.4
申请日：1994-05-19
发明人： Tanaka, Katsuyuki , Nishio, Yoshitaka , Kohama, Tokio , Kameyama, Satoshi 237, Shiratoriryo, , Ohara, Kouzi , Kato, Masanori
IPC分类号： G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/107 , G10K2210/112 , G10K2210/1282 , G10K2210/12822 , G10K2210/3027 , G10K2210/3032 , G10K2210/3033 , G10K2210/3039 , G10K2210/3046 , G10K2210/51
摘要： 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 (5) for detecting an engine rotating speed and a waveform generator circuit (46) 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 (3) is passed through a bandpass filter (41) and a rectifier circuit (42) to generate a control signal which is an average value of alternating current components of the output. A CPU (44), with reference to a map previously stored in a memory (45), 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 (6A, 6B) disposed in an intake tube and an exhaust tube for reducing noise.
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