Patent ID: 11939037
Assignee: HONDA MOTOR CO., LTD.
Field: Environmental technology (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 11:
12. The outboard motor according to claim 1,
wherein the second catalyst is of an adsorptive type that adsorbs nitrogen oxides,
the outboard motor comprises:
a controller capable of controlling an air-fuel ratio of an air-fuel mixture supplied to the engine; and
a sensor that detects information capable of identifying whether an adsorption amount of the second catalyst is in a state close to a saturated state, and
the controller, in a case of controlling the air-fuel ratio to a leaner side than a theoretical air-fuel ratio, when determining that the adsorption amount of the second catalyst is in the state close to the saturated state based on the information detected by the sensor, controls the air-fuel ratio to a richer side than the theoretical air-fuel ratio and promotes a reduction reaction of the nitrogen oxides absorbed by the second catalyst.