| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine capable of stably maintaining exhaust emission control function by accurately performing supply of auxiliary agent necessary for maintaining exhaust emission control function. <P>SOLUTION: This device is provided with auxiliary agent supply means 32, 58 supplying auxiliary agent for maintaining exhaust emission control function of exhaust emission control means 24, 56, 78 to an upstream side of the exhaust emission control means 24, 56, 78. A control means 38 adjusting auxiliary agent supply quantity by controlling the auxiliary agent supply means 32, 58 is provided with reference supply quantity establishing parts 40, 50, 68, 86 establishing reference supply quantity of auxiliary agent necessary for maintaining exhaust emission control function, target supply quantity establishing parts 42, 52, 70, 88 correcting reference supply quantity based on exhaust gas pressure and establishing target supply quantity of auxiliary agent, and supply control parts 44, 54, 72, 90 controlling the auxiliary agent supply means to supply auxiliary agent of the target supply quantity. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
