| 摘要 |
PROBLEM TO BE SOLVED: To improve operating efficiency of a hybrid vehicle. SOLUTION: A motor 130 is connected to a sun gear 121 of a planetary gear 120, a drive shaft 112 and an assist motor 140 are connected to a ring gear 124, and an engine 150 is connected to a planetary carrier 123 through a planetary gear 200 constituting a speed change mechanism. Power output from the engine 150 is distributed into two parts by the planetary gear 120, while regenerating partly the power as the electric power in the motor 130, the rest of the power is output to the drive shaft 122. The regenerated power is supplied to the assist motor 140, and torque output to the drive shaft is added. In accordance with a running condition of a vehicle, speed change ratio is controlled so as to decrease a difference between input/output rotational speeds of the planetary gear 120. As the result, regenerative electric power at torque change time can be suppressed, a loss according to the conversion between power and electric power can be reduced. |
