Patent ID: 11891935
Assignee: HONDA MOTOR CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An exhaust gas purification apparatus for an internal combustion engine including an exhaust passage, the exhaust gas purification apparatus comprising:
a catalyst device arranged in the exhaust passage, the catalyst device configured to purify exhaust gas of the internal combustion engine;
an exhaust ignition device arranged in the exhaust passage upstream from the catalyst device, the exhaust ignition device configured to ignite an air-fuel mixture in the exhaust passage; and
a controller configured to control a catalyst heating treatment of the catalyst device by adjusting (i) a supply of the air-fuel mixture to the exhaust ignition device, and (ii) an ignition of the air-fuel mixture via the exhaust ignition device, the catalyst heating treatment including:
setting a target value of an equivalence ratio of the air-fuel mixture to a first equivalence ratio greater than 1 until a predetermined first time elapses from a start of the supply of the air-fuel mixture, and
setting the target value to a second equivalence ratio less than 1 when the first time elapses.