| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain a sense of comfortability of each occupant by suppressing the generation of a torque variation due to switching of the output characteristics of an electric motor for rotating and driving the driving wheels of a vehicle. <P>SOLUTION: A control method is provided for switching the output characteristics of the electric motor 5 for rotating and driving the driving wheels 16 of a vehicle 1 between a low-speed mode and a high-speed mode when a rotation speed N of the electric motor 5 passes through a switching line P. The method includes step (S2) of measuring the frequency of usage of the rotation speed N of the electric motor 5, step (S12) of determining whether usage frequency corresponding to the switching line P is not less than a predetermined threshold Fa based on the data of measured usage frequency, and steps (S14, S15) of shifting the switching line P to a side of lower usage frequency when it is determined that the usage frequency is not less than the threshold Fa. <P>COPYRIGHT: (C)2010,JPO&INPIT |
