Patent ID: 7665297
Filing Date: 2010-02-23
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. An exhaust purifying apparatus applied to an internal combustion engine, which has a plurality of groups of cylinders, each group being connected to different one of exhaust purifying catalysts, the apparatus comprising: estimating means for individually estimating the flow rate of exhaust gas in each exhaust purifying catalyst; and setting means for individually setting the control manner of each group of cylinders connected to the corresponding exhaust purifying catalyst in accordance with the estimated flow rate of exhaust gas of the exhaust purifying catalyst, wherein the exhaust passages are merged together after exhaust gas of each group of cylinders pass through the corresponding exhaust purifying catalyst; and wherein the estimating means estimates the flow rate of exhaust gas by computing a mass flow rate G