Patent ID: 8752366

Claim:
A method for abating carbon monoxide in an exhaust stream, the method comprising: injecting an amount of air into the exhaust stream upstream of a catalyst to produce an air/exhaust mixture before catalyzing the exhaust stream, wherein the catalyst catalyzes a chemical reaction of 2CO+O 2 →2CO 2 ; measuring an air/fuel ratio of the air/exhaust mixture upstream of the catalyst; reacting carbon monoxide in the air/exhaust mixture with oxygen in the presence of the catalyst to produce carbon dioxide to abate carbon monoxide in the air/exhaust mixture, wherein the catalyst has an operating temperature range; measuring a temperature of the catalyst, when the temperature of the catalyst is below the operating temperature range; measuring the temperature of the catalyst, when the temperature of the catalyst is within or above the operating temperature range; adjusting the amount of air injected into the exhaust based on the air/fuel ratio and not the temperature of the catalyst, when the temperature of the catalyst is below the operating temperature range of the catalyst; and adjusting the amount of air injected into the exhaust based on the temperature of the catalyst and not the air/fuel ratio, when the temperature of the catalyst is within or above the operating temperature range of the catalyst.