Explanation of circuits

In Normal Mode, switch-over of EV traveling and hybrid traveling is performed automatically according to the change of charge amount for the high voltage battery.

• When the charge amount for the high voltage battery is large, EV traveling is actively performed. However, at high load or high vehicle speed, the engine operates automatically.
• When the charge amount for the high voltage battery low, the hybrid traveling that uses the engine and motor concurrently is performed. However, if the charge amount recovers by regeneration, etc., the EV traveling is performed again.

In the hybrid battery save mode, the vehicle uses the hybrid traveling actively so as not to reduce the power charged in the high voltage battery. This allows the vehicle to maintain the charged power in such a case of performing the EV traveling at destinations.

• Even when the charge amount of the high voltage battery is high, the charged power can be maintained by restraining the EV traveling and performing the hybrid traveling.

In the hybrid battery charge mode, the high voltage battery is actively charged while the vehicle is being driven. This allows to charge the battery by using the engine driving force to generate power also without depending on external charging in such a case as performing EV traveling at destinations.

• By increasing the engine load during driving, the high voltage battery is charged.
• When the high voltage battery is charged sufficiently, the mode is automatically switched to the hybrid battery save mode.