Hybrid vehicle and method of controlling hybrid vehicle

摘要

A battery ECU detects a state of charge and a temperature of a power storage unit, and transmits the state of charge and the temperature to an HV-ECU. The HV-ECU calculates the charge/discharge allowable power of the power storage unit based on the state of charge and the temperature of the power storage unit, and sets control-specific charge/discharge allowable power by correcting the charge/discharge allowable power so as to limit the charge/discharge allowable power to be changed at a predetermined first change speed. The HV-ECU then determines the power target value in accordance with the request from the driver within the range of the control-specific charge/discharge allowable power. The HV-ECU sets the control-specific charge/discharge allowable power such that, at start-up of the vehicle, the maximum value in the charge/discharge allowable power characteristics of the power storage unit is set as an initial value and the value is decreased from the initial value at the predetermined second change speed higher than the first change speed.

主权项

1. A hybrid vehicle comprising:
an internal combustion engine; a power generation unit capable of generating electric power by receiving power generated by an operation of said internal combustion engine; a power storage unit configured to be chargeable by receiving the electric power from said power generation unit; a driving force generation unit generating a driving force of a vehicle by receiving the electric power supplied from said power storage unit; and a control device controlling the driving force of the vehicle generated in response to a request from a driver and controlling the electric power charged and discharged in said power storage unit, said control device including a power storage unit state detection unit detecting a state of charge and a temperature of said power storage unit, a charge/discharge allowable power calculation unit calculating charge/discharge power allowable in said power storage unit based on the state of charge and the temperature of said power storage unit detected by said power storage unit state detection unit, a charge/discharge allowable power control unit setting control-specific charge/discharge allowable power by correcting charge/discharge allowable power calculated by said charge/discharge allowable power calculation unit so as to limit the charge/discharge allowable power to be changed at a predetermined first change speed and, a charge/discharge control unit determining a power target value in accordance with the request from the driver within a range of said control-specific charge/discharge allowable power set by said charge/discharge allowable power control unit, and feedback-controlling the electric power charged and discharged in said power storage unit in accordance with the power target value, said charge/discharge control unit is configured to perform control for starting said internal combustion engine in response to a request at start-up of said hybrid vehicle within said range of said control-specific charge/discharge allowable power, when performing said control for said internal combustion engine, said internal combustion engine is started by receiving the electric power supplied from said power storage unit and said driving force generation unit is operated in regenerative mode so as to reduce rattling noise, said charge/discharge allowable power control unit setting said control-specific charge/discharge allowable power such that, at start-up of said vehicle, a maximum value of the charge/discharge power allowable in said power storage unit is set as an initial value and the control-specific charge/discharge allowable power is decreased from the initial value at a predetermined second change speed higher than said first change speed.