HYBRID VEHICLE AND DRIVING RESISTANCE MEASUREMENT METHOD OF HYBRID VEHICLE

摘要

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.