Patent ID: 11904834
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. A control device for a series hybrid vehicle, the series hybrid vehicle including:
an engine,
a catalyst that is disposed in an exhaust path of the engine and controls exhaust gas,
a generator that generates electric power using power output from the engine,
a battery that stores the electric power generated by the generator, and
a traction electric motor that is driven by the electric power stored in the battery, the control device comprising an electronic control unit configured to:
perform intermittent operation of the engine in a case where a predetermined condition is satisfied;
acquire information on a temperature of the catalyst;
change, when the information on the temperature of the catalyst indicates that the temperature of the catalyst is equal to or higher than a predetermined temperature, an operating point of the engine to an operating point that reduces a temperature of the exhaust gas while generating the electric power by the generator and that is on a power generation operation line that reduces an amount of power generation of the generator at the same vehicle speed, the power generation operation line being included in a plurality of power generation operation lines defined on a two-dimensional map that is determined by a vehicle speed and the amount of power generation of the generator;
determine at a predetermined timing whether the temperature of the catalyst will fall below a catalyst deactivation temperature, based on the information on the temperature of the catalyst; and
prohibit the intermittent operation of the engine, and perform low load, excess spark advance operation of the engine or low load, rich A/F operation of the engine, in a case where the temperature of the catalyst does not fall below the catalyst deactivation temperature.