ELECTRICALLY DRIVEN VEHICLE AND METHOD OF CONTROLLING THEREOF

摘要

Motor traveling using only an output of a rotating electrical machine utilizing power of a vehicle-mounted power storage device is applicable to an electrically-powered vehicle, within a region inside a maximum output line (350) in motor traveling. The maximum output line (350) is composed of straight line portions defining an upper limit torque (TMmax) and an upper limit vehicle speed (VMmax) and a curved line portion defining upper limit output power, in motor traveling. When an output power upper limit value (Wout) from the power storage device is limited due to an increase in a current load or a reduction in the SOC of the power storage device, a driving region to which motor traveling is applicable is narrowed. Operation in a high rotation region, where efficiency is reduced, is avoided by changing the upper limit vehicle speed (VMmax) in motor traveling in response to the SOC and/or the current load of the power storage device. Thereby, a period for which the vehicle can travel without limitation on the output power upper limit value Wout can be ensured sufficiently.