| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for reducing transmission shock of an automatic transmission part in a vehicle drive unit equipped with an automatic transmission part and a differential mechanism to which a motor is connected. <P>SOLUTION: When a rotation speed N<SB>M2</SB>of a second motor is changed by a speed change (downshift) in an automatic transmission part 20, a target engine rotation speed change rate dNe*/dt is changed in accordance with a rotational acceleration dN<SB>M2</SB>/dt of the second motor. Thereby, even if the rotation speed N<SB>M2</SB>of the second motor M2 is changed by the downshift in the automatic transmission part 20, and, influenced by this, the engine rotation speed Ne is changed, the engine rotation speed Ne is prevented from substantially deviating from the target engine rotation speed dNe*. In consequence, a variation in the first motor feedback torque TF<SB>M1</SB>is suppressed that is changed so as to cause the engine rotation speed Ne to correspond to the target engine rotation speed dNe*, reducing transmission shock at the downshift. <P>COPYRIGHT: (C)2009,JPO&INPIT |
