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1.无噪声发动机 汽车的噪声主要是来自于发动机的振动,振动通过底盘传遍整个车厢并向四周扩散。大不列颠厄色克斯大学的专家为了减少汽车发动机的振动,设计了一种发动机主动隔振系统,该系统可在振动时产生相反方向、相反相位的振幅和振频,与原振动相抵消,以达到减少噪声的目的。 减振消声的过程是先用特殊的传感器捕捉开始产生的振频和振幅,经微机处理后由发动机上安装的电磁体振荡器进行减振消声。这一处理过程吸收了振动,可使噪声降低10dB。更令人感兴趣的是,振动的减少使管道的动力传动系统的联接更为简化,发动机成本也能降低。
1. Noise-free engine The noise of the car is mainly from the vibration of the engine. The vibration spreads through the chassis to the entire carriage and spreads around. In order to reduce the vibration of automobile engine, the expert of University of Essex of Great Britain designs a kind of active vibration isolation system of the engine, which can produce the opposite direction when vibrating, and the amplitude and vibration frequency of the opposite phase counteract the original vibration Achieve the purpose of reducing noise. Vibration damping process is to use a special sensor to capture the beginning of the vibration and amplitude generated by the computer by the engine after the installation of the electromagnetic oscillator for damping noise. This process absorbs vibration and reduces the noise by 10dB. Even more intriguing is that the reduction in vibration simplifies the connection of the driveline’s power train and reduces the cost of the engine.