Patent ID: 11927146
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 3:
4. A control method for a vehicle, the vehicle including an internal combustion engine and an automatic transmission coupled to the internal combustion engine, and the internal combustion engine including a cylinder in which an air-fuel mixture of fuel and intake air is burned, an exhaust passage connected to the cylinder, and a three-way catalyst located in the exhaust passage, the control method comprising:
executing a shifting process that switches a gear ratio of the automatic transmission;
executing a lean operation process that operates the internal combustion engine with an air-fuel ratio of the air-fuel mixture in the cylinder leaner than a stoichiometric air-fuel ratio; and
when executing the shifting process during execution of the lean operation process, setting an air-fuel ratio in a case in which the shifting process is being executed to a value closer to the stoichiometric air-fuel ratio than an air-fuel ratio in a case in which the shifting process is not being executed.