Control apparatus and control method for hybrid vehicle

摘要

A vehicle includes a charging unit for externally charging a power storage unit with electric power received from an external power supply, and an electric power generation unit capable of generating electric power from drive force received from an engine. The power storage unit is configured to be internally chargeable with electric power received from the electric power generation unit. The vehicle travels in selected one of EV priority mode restricting internal charging of the power storage unit and HV priority mode controlling internal charging such that a state of charge of the power storage unit is kept within a predetermined range. When a predetermined operating condition is satisfied while the vehicle is traveling, a control apparatus generates an operation request to the engine. The control apparatus changes the operating condition of the engine depending on whether the mode is EV priority mode or HV priority mode.

主权项

1. A control apparatus for a hybrid vehicle mounted with an internal combustion engine and an electric motor serving as a source of power for causing the vehicle to travel,
said hybrid vehicle including: a chargeable and dischargeable power storage unit; a charging unit for externally charging said power storage unit with electric power received from an external power supply, when said power storage unit is caused to enter a state chargeable by the external power supply; and an electric power generation unit capable of generating electric power from drive force received from said internal combustion engine, said electric motor generating drive force from electric power received from said power storage unit, and said power storage unit being configured to be internally chargeable with electric power received from said electric power generation unit, said control apparatus comprising: a mode selection unit for selecting one of an EV priority mode and an HV priority mode for causing said vehicle to travel, said EV priority mode restricting internal charging of said power storage unit by said electric power generation unit, and said HV priority mode controlling internal charging of said power storage unit by said electric power generation unit such that a state of charge of said power storage unit is kept within a predetermined range; an operation request generation unit for generating an operation request to said internal combustion engine when a predetermined operating condition is satisfied while said vehicle is traveling, said predetermined operating condition selected from at least one of a coolant temperature of said internal combustion engine and a temperature of a catalyst capable of purifying exhaust gas discharged from said internal combustion engine; and an intermittent operation control unit for starting said internal combustion engine in response to said operation request and stopping said internal combustion engine in response to cancellation of said operation request, said operation request generation unit changing said predetermined operating condition depending on whether said EV priority mode is selected or said HV priority mode is selected, said control apparatus further comprises a start preparation unit for preparing for start of said internal combustion engine by preheating a sensor provided to an exhaust system for said internal combustion engine, and said operation request generation unit generates said operation request when preparation for start of said internal combustion engine is completed while said HV priority mode is selected, and said operation request generation unit does not generate said operation request when preparation for start of said internal combustion engine is completed while said EV priority mode is selected due to said changing of said predetermined operating condition depending on whether said EV priority mode is selected or said HV priority mode is selected.