Abgasregeleinrichtung einer Brennkraftmaschine und Verfahren zur Schätzung des Abgasdurchflusses

摘要

An exhaust control apparatus applied to an internal combustion engine (1) in which intake sides of a plurality of cylinder groups are connected to a common intake passage (8) and exhaust sides thereof are connected to different exhaust passages (10L, 10R), comprises an exhaust gas flow rate adj usting device (6) for causing a flow rate of exhaust gas, which is discharged through each of the exhaust passages of the cylinder groups, to be changed, an exhaust gas flow rate difference estimating device (12) for estimating a difference in an exhaust gas flow rate between the exhaust passages of the cylinder groups, and an exhaust gas flow rate control device (12) for controlling the exhaust gas flow rate adjusting device so as to reduce the estimated difference in the exhaust gas flow rate.