| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restrain a shift shock by a variation in torque, by precisely calculating target torque outputted from a motive power source required in shifting, in a vehicle mounted with a stepped automatic transmission. <P>SOLUTION: An ECT_ECU executes a program including a Step (S100) of determining whether or not to be in steady time of not shifting or in the shifting, a Step (S200) of setting a present gear stage in a virtual gear stage in the steady time, a Step (S400) of setting a pre-shift gear stage to a virtual gear stage before starting an inertial phase in the shifting (YES in S300), a Step (S500) of setting a post-shift gear stage to the virtual gear stage after starting the inertial phase in the shifting (NO in S300), a Step (S900) of calculating a shift progress degreeα, a Step (S1000) of calculating the virtual gear ratio based on the virtual gear stage and the shift progress degreeα, and a Step (S1100) of calculating target engine torque by using the virtual gear ratio. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
