HYBRID VEHICLE

摘要

A DC/DC converter is driven when an inter-terminal voltage of a low-voltage battery is lower than a determination voltage and an engine is started when the inter-terminal voltage becomes lower than a determination voltage during the driving of the DC/DC converter so that an alternator is driven at a predetermined driving point at which the alternator can he efficiently driven and the DC/DC converter is controlled such that the inter-terminal voltage of the low-voltage battery becomes a rated voltage. Energy efficiency can be improved since the alternator is efficiently driven.

主权项

1. A hybrid vehicle comprising:
an engine configured to output power for traveling; a motor configured to output power for traveling; a first battery connected to a first electric power line to which the motor is connected; an automotive electrical instrument; a second battery connected to a second electric power line to which the automotive electrical instrument is connected; a DC/DC converter transforming electric power of the first electric power line and supplying the transformed electric power of the first electric power line to the second electric power line; an alternator supplying electric power generated by driving by the engine to the second electric power line; and an electronic control unit
i) configured to execute a first control for controlling the DC/DC converter and the alternator such that electric power is supplied from the DC/DC converter to the second electric power line by the alternator being stopped when an electric power storage ratio of the second battery or an inter-terminal voltage of the second battery is lower than a predetermined threshold; andii) configured to execute a second control for controlling the DC/DC converter and the alternator such that the electric power from the DC/DC converter and the electric power from the alternator are supplied to the second electric power line when the electric power storage ratio of the second battery or the inter-terminal voltage of the second battery is reduced from a predetermined threshold during the execution of the first control, wherein the electronic control unit is configured to control, in the second control, the DC/DC converter and the alternator such that the electric power from the DC/DC converter and the electric power from the alternator are supplied to the second electric power line while the alternator is driven at a predetermined driving point for efficient driving.