| 摘要 |
A vibration sensor for detecting the magnitude of engine vibration and for generating an electric signal corresponding to the vibration incorporates a piezoelectric vibration element. The vibration sensor is used, for example, for detecting the knocking condition of an internal combustion engine. The piezoelectric element is secured onto an internal boss of a sensor housing by a threaded fastener. The fastener effectively secures the piezoelectric element onto the sensor boss so that the connection therebetween is not affected by vibration which could otherwise impair the electrical contact.
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