| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent overheating without reducing a driving force by enhancing an assist rate by one motor/generator when the other motor/generator is in an overheat state during a driving force assisting by the motors/generators. <P>SOLUTION: When it is determined that a target driving force is great and torque amplifying by a fastening of a brake Br is required at step 42, the fastening of the brake is instructed at step 46, and an engine torque command value Te is calculated at step 47. When it is determined at step 48 that the target driving force is not satisfied with the engine torque Te even by the fastening of the brake, torque command values Tm1 and Tm2 (assist force) of the motors/generators MG1 and MG2 realizing the target driving force are calculated by a balance equation on an alignment chart at step 50. When a temperature Cm1 of motor/generator MG1 high in priority is determined to be less than a set temperature at step 51, the torque command values Tm1 and Tm2 at step 50 are used, and when the temperature Cm1 is determined to be more than the set temperature (overheat), the torque command values Tm1 and Tm2 are calculated again such that a power supply amount to the motor/generator MG1 at overheat state is reduced and the power supply amount to the motor/generator MG2 is increased, thereby changing an assist sharing rate. <P>COPYRIGHT: (C)2004,JPO |
