HYBRID VEHICLE AND METHOD OF CONTROLLING SAME

摘要

A hybrid vehicle is provided with an engine (11), a generator (13) capable of generating power by being driven by the engine (11), an electric motor (12) capable of running on power supplied from the generator (13), a power split device (14) that transmits output from the engine (11) to a driving wheel (15) and the generator (13) and also transmits output from the electric motor (12) to the driving wheel (15), and a main ECU (28) that controls an output ratio of the engine (11) and an output ratio of the electric motor (12) using the power split device (14) according to the running state of the vehicle. When the operating mode of the engine (11) is switched between a lean burn operating mode and a stoichiometric bum operating mode, the main ECU (28) selectively increases and decreases the output ratio of the electric motor (12) so that the total output, which is the combined output of the engine (11 ) and the electric motor (12), is constant.