Patent ID: 9020673
Filing Date: 2015-04-28
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
1. A hybrid vehicle that includes an internal combustion engine that outputs power for travel; a motor to and from which power for travel is input and output; and a secondary battery that transmits and receives electric power to and from the motor, wherein the hybrid vehicle travels using only the power input to and output from the motor in an electric-powered travel mode, and the hybrid vehicle travels using the power output from the internal combustion engine and the power input to and output from the motor in a hybrid travel mode, the hybrid vehicle comprising: a hybrid electronic control unit (ECU) including program logic configured to: set an execution travel mode to one of two travel modes including an electric-powered travel priority mode where the hybrid vehicle travels with priority being given to the electric-powered travel mode over the hybrid travel mode, and a hybrid travel priority mode where the hybrid vehicle travels with priority being given to the hybrid travel mode over the electric-powered travel mode; and when the execution travel mode is switched while the internal combustion engine is being operated, control the internal combustion engine and the motor so that charging/discharging electric power for charging or discharging the secondary battery is gradually changed and the hybrid vehicle travels in the switched execution travel mode; and a battery electronic control unit (ECU) including program logic configured to: calculate a charge ratio that is a ratio of an amount of electricity stored in the secondary battery to an entire capacity of the secondary battery, based on a state of the secondary battery, wherein the hybrid ECU sets engine required power that is to be output from the internal combustion engine, based on a sum of travel power that is required for travel based on an accelerator operation, and charging/discharging required power that is required for charging or discharging the secondary battery based on the calculated charge ratio, and controls the internal combustion engine and the motor so that the set engine required power is output from the internal combustion engine under a predetermined restriction imposed on an operation of the internal combustion engine and the hybrid vehicle travels with the travel power; and when the execution travel mode is switched while the engine is being operated, the hybrid ECU sets and controls the charging/discharging required power so that the charging/discharging required power is gradually changed to decrease a difference in the charging/discharging required power due to switching of the execution travel mode.