| 摘要 |
In an exhaust gas purification apparatus for an internal combustion engine which is provided with an NOx catalyst arranged in an exhaust passage of the internal combustion engine, the present invention has for its problem to be solved to suppress an increase in exhaust emissions, which results from processing for raising the temperature of the NOx catalyst, to a small level. In order to solve the above-mentioned problem, the exhaust gas purification apparatus for an internal combustion engine of the invention is constructed such that when an amount of increase in the NO x removal rate becomes smaller with respect to an amount of rise in the temperature of the NOx catalyst, the execution of temperature raising processing is deferred, and processing to make small the flow rate of exhaust gas discharged from the internal combustion engine and processing to make small the amount of smoke discharged from the internal combustion engine are executed. |
