| 摘要 |
PURPOSE:To adjust an output vibration and to keep vehicle performance good by restricting a control output to a piezoelectric element actuator according to increase of an element temperature and correcting the control output so that an expansion degree of the actuator is reduced. CONSTITUTION:An active mount 6 is constituted so that a dynamic characteristic can be switched by a piezoelectric element layered product serving as a piezoelectric element actuator. A signal generator 16 computes a rotational speed of an engine and a crank angle on the basis of an ignition signal, which a cam position sensor 17 outputs, of an engine 1. On the basis of the computed result, an impressed voltage to the piezoelectric element layered product is determined, and a driving voltage is impressed to the active mount 6 via an output variable device 18 and an amplifier 19. A correction signal is outputted to the output variable device 18 from a temperature guarantee circuit according to the element temperature of the piezoelectric element layered product, the driving voltage is automatically altered, a control output is restricted according to increase of a temperature, and consequently, an extension degree is reduced. |
