EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust gas purification device for an internal combustion engine is characterized by comprising a feedforward control means (47), a feedback control means (49) for indicating a correction operation amount for the target temperature of a DPF (7), and an operation amount addition means (51) for adding a basic operation amount from the feedforward means (47) and the correction operation amount from the feedback control means (49) to calculate an operation amount, and being provided with either an integrator reset means (55) for resetting the integral value of an integrator that constitutes the feedback control means (49) when the exhaust gas flow rate decreases rapidly and/or a basic operation amount calculation means for calculating the basic operation amount of the feedforward control means according to a signal based on the exhaust gas flow rate.