| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas purification device for an internal combustion engine capable of stably controlling the DPF inlet temperature in the target temperature, even when an exhaust gas flow rate-reduced state continues, after an exhaust gas flow rate reduces. <P>SOLUTION: This exhaust gas purification device includes a feedforward control means 47, a feedback control means 49 for commanding a correction operation amount to the target temperature of a DPF 7, and an operation amount adding means 51 for calculating an operation amount by adding a basic operation amount from the feedforward control means 47 and the correction operation amount from the feedback control means 49, and includes at least one of an integrator reset means 55 for resetting an integral value of an integrator that constitutes the feedback control means 49 when an exhaust gas flow rate decreases rapidly or a basic operation amount calculation means for calculating a basic operation amount of the feedforward control means by a signal based on the exhaust gas flow rate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
