| 摘要 |
<P>PROBLEM TO BE SOLVED: To estimate a gradient of a road surface more accurately even during speed change. <P>SOLUTION: An output torque Tout is calculated based on an input torque Tin and a gear ratio γ of a transmission mechanism, and a gradient of a road surface is estimated based on a reference acceleration αbase obtained on the basis of the output torque Tout and an actual acceleration α, in which when a transmission pattern is other than PowerOnDown, a gear ratio γbe at a gear position before speed change is set to the gear ratio γ (S250) till the start of an inertia phase (S240), and a gear ratio γaf at a gear position after speed change after the start of the inertia phase is set to the gear ratio γ (S260). When the transmission pattern is PowerOnDown, the gear ratio γbe before speed change is set to the gear ratio γ(S250) till the rotation speed of an input shaft of the transmission mechanism is synchronized with the rotation speed after speed change (S270), and after the rotation speed of the input shaft is synchronized with the rotation speed after the speed change, the gear ratio γaf after speed change is set to the gear ratio γ (S260). <P>COPYRIGHT: (C)2013,JPO&INPIT |
