control for rotation speed calculation device, for controlling the rotational speed calculation method and control for rotation speed calculation program

摘要

PROBLEM TO BE SOLVED: To provide a low-cost control rotational speed calculation device capable of performing stable control.;SOLUTION: Rotation signals of two versatile sensors are processed by a CPU of an arithmetic unit. When the rotational speed of one of the sensors is slower than a reference value V_s and the rotational speed of the other sensor is faster than the reference value (S11: YES, and S13: YES), faster rotational speed is selected (S12, S14), and the movement average thereof is determined as a control rotational speed NEa. In other cases, the absolute values of the differences between the current and last rotational speeds of the two sensors are compared to one another, the current rotational speed of the sensor with a smaller absolute value of the difference is selected (S15: YES, and S15: NO), and the movement average thereof is determined as a control rotational speed NEa. Even if one of the sensors has a problem, it is possible to smoothly shift in a shockless state and to prevent the rotation of an engine from becoming unstable.;COPYRIGHT: (C)2011,JPO&INPIT