Patent ID: 8392041

Claim:
A hybrid vehicle comprising: an internal combustion engine, a rotating electric machine used together with the internal combustion engine for driving the vehicle, an output shaft transmitting power to a driving wheel, a transmission member coupled to the output shaft, a power split device splitting an output from the internal combustion engine to the rotating electric machine and the transmission member, a detection device detecting irregularities of a road, and a control unit reducing, when a detected result by the detection device indicates generation of periodic torque variation at the output shaft, the output from the internal combustion engine based on the detected result, wherein a resonance frequency of a transmission mechanism transmitting power to the transmission member from the internal combustion engine via the power split device changes according to the output from the internal combustion engine, and the control unit reduces the output from the internal combustion engine until the resonance frequency of the transmission mechanism goes outside an unsprung resonance bandwidth.