Motor Generator Condition

1. The supply of electrical power from the HV battery to motor generator no. 2 provides force to drive the wheels.
2. While the tires are driven by the engine via the planetary gears, motor generator no. 1 activates to supply electricity via the planetary gears to motor generator no. 2 to drive the wheels.
3. When the vehicle is decelerating, kinetic energy from the wheels is recovered into electrical energy by motor generator no. 2 and is used to recharge the HV battery.

The hybrid vehicle control ECU switches between these modes (1, 2, 1+2, or 3) according to the driving conditions. However, when the HV battery charge is low, the HV battery will be charged by the engine turning motor generator no. 1.