Engine control device and engine control method and variable valve timing control device and variable valve timing control method using them

摘要

A problem of the present invention is the appropriate control of a motor by ensuring the speed calculation accuracy even in a case where the motor frequently switches between forward and backward rotation. A motor control device 20 is included which includes a rotary angle sensor 12 which outputs a three-phase signal for detecting an angle of rotation of an engine 10 and controls a speed output of the motor 10 based on the three-phase signal and a command signal 21, It is a means 42 for determining a first period of time for determining a first period of time,in which the three-phase signal output from the rotary angle sensor 12 is output over three phases in the order of rise, fall and rise, and a means 43 for determining a second time period for determining a second time period, in which the three-phase signal output from the rotary angle sensor 12 is output over three phases in the order of drop, rise and drop. A speed output of the motor 10 is controlled to be updated when an output of the rotary angle sensor 12 is in the first time period or in the second time period.