Control device and control method for hybrid vehicle

摘要

A hybrid vehicle has a first running mode with an engine stopped and a second running mode with the engine operating. An ECU monitors information related to the frequency of intermittent startup of the engine in response to the startup and stoppage of the engine during vehicle running. The ECU executes running control such that startup of the engine is suppressed during the first running mode when in an operation pattern in which the frequency of intermittent startup is high. Accordingly, discomfort to the driver and degradation in fuel efficiency caused by repeating stoppage and startup of the engine frequently in a short period of time can be prevented.

主权项

1. A control device for a hybrid vehicle having an engine and a traction motor mounted, said control device comprising:
a running control unit that selects a first running mode with said engine stopped and a second running mode with said engine operating, based on a state of the vehicle, and an engine control unit that starts said engine in association with modification from said first running mode to said second running mode, and stops said engine in association with modification from said second running mode to said first running mode, said running control unit controlling running of said hybrid vehicle such that modification from said first running mode to said second running mode is suppressed when frequency of intermittent startup is high as compared to a case where the frequency of said intermittent startup is low, based on a count of an amount of times that the engine is stopped within a predetermined period of time during vehicle running.