| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a rise in temperature of a motor connected to a drive axle through a transmission. <P>SOLUTION: When motor temperature Tm is equal to or larger than a threshold T1 or when inverter temperature Tinv is equal to or larger than a threshold T2, a value 1 is set to a motor state judgment flag F, and a Lo-Hi shift line of a transmission is set to a high-vehicle-speed side to make an up-shift speed change difficult (S340, S350); and a motor is driven within a high-load range of low number of revolutions and high torque while a current transmission step (n) of a transmission is in a Hi gear state, and when the motor state judgment flag F indicates the value 1, a down-shift speed change is forcibly made irrelevantly to a Hi-Lo shift line (S400 to S420). Consequently, the motor can be driven in a region of high number of revolutions and low torque, so that a rise in temperature of the motor can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
