In response to a coasting drive instruction for measurement of a driving
resistance of a hybrid vehicle, the coasting control procedure of the
invention prohibits a change of a gear position in a transmission and
stops both an engine and a motor MG1. The coasting control procedure
calculates a canceling torque, which cancels out a torque applied to a
ring gear shaft or a drive shaft via a power distribution integration
mechanism by generation of an inertia torque accompanied with a rotation
speed change of the motor MG1. The calculated canceling torque is set to
a torque command Tm2* of a motor MG2, and the motor MG2 is driven and
controlled with the torque command Tm2*. This arrangement makes the ring
gear shaft or the drive shaft completely free and enables accurate
measurement of the driving resistance of the hybrid vehicle during such a
coasting drive of the hybrid vehicle in a fully non-driving state.