Patent ID: 9157391
Filing Date: 2015-10-13
Classification: F02D

Abstract:
1. A system for controlling a combustion engine, comprising: a catalyst reaction device configured to mount along an exhaust path of an engine, the catalyst reaction device including one or more catalyst reaction cartridges configured to reduce an amount of pollutants emitted from the catalyst reaction device; a pre-catalyst exhaust sensor configured to be mounted along the exhaust path before the one or more catalyst reaction cartridges; a post-catalyst exhaust sensor configured to be mounted along the exhaust path after the one or more catalyst reaction cartridges; and an air-fuel ratio controller configured to output a control signal to a fuel valve for controlling an air-fuel mixture input into the engine, the air-fuel ratio controller being communicatively connectable to the pre-catalyst exhaust sensor and the post-catalyst exhaust sensor, wherein the air-fuel ratio controller is configured to output the control signal to the fuel valve to increase a fuel level in the air-fuel mixture in response to the signal received from the post-catalyst exhaust sensor switching from a high signal to a low signal during a period when the signal received from the pre-catalyst exhaust sensor is continuously maintained as a high signal.