| 摘要 |
PROBLEM TO BE SOLVED: To satisfy both of power performance and energy-saving, in an engine start during travel of HEV.SOLUTION: A hybrid vehicle can travel by either of electric travel using only output of a second power generating electric motor MG2 and hybrid travel using output of the second power generating electric motor MG2 and an internal combustion engine 20. After a battery 64 is externally charged by use of a charger 102, the vehicle performs electric travel in an EV mode. At that time, if vehicle required power becomes an engine start power threshold or more and if vehicle speed becomes an engine start vehicle speed threshold or more, the vehicle is shifted to a hybrid travel state. If the battery 64 is externally charged and thereafter the electric travel in the EV mode continues, the engine start vehicle speed threshold is set to a high side threshold. After the internal combustion engine 20 is started at least once during electric travel in the EV mode after external charging, the engine start vehicle speed threshold is set to a low side threshold lower than a high side threshold. |
