| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a turbocharger system capable of preventing the error between an actual position and a detected position by processing of a signal of an encoder with a simple function. <P>SOLUTION: This turbocharger system comprises a CPU, an I/F circuit of peripheral circuits and the external, a controller for rotating a motor on the basis of a target opening signal input from the external, and adjusting a supercharging pressure by changing a blade angle by the rotation, and an encoder signal processing circuit of a motor position controller for comparing the positional information obtained from output signals of two encoders mounted on a rotating shaft of the motor, with the target opening signal, and controlling the position of the motor to make them agree with each other. A digital filter circuit is mounted between an encoder signal input terminal and the CPU, a sampling time of the filter is variable by the CPU, and its sampling time is shorter than a pulse width as a minimum value of the signal input from the encoder. <P>COPYRIGHT: (C)2004,JPO |
