A control apparatus for an internal combustion engine (10) in the present invention includes a DPF (28) installed in an exhaust passage (16) and a DOC (26) installed in the exhaust passage (16) on the upstream side of the DPF (28). The control apparatus ch...

Usage method of conjunction involves operating operated internal combustion engine with excess air, reducing nitrogen oxides, forming reducing agent in the exhaust gas upstream of catalyst, loading catalyst material to the selective catalystic reduction of...

An exhaust purification system of an internal combustion engine is provided with an exhaust purification catalyst which includes an upstream side catalyst and a downstream side catalyst and which makes NOand hydrocarbons react. The upstream side catalyst h...

An object of this invention is to accurately estimate an amount of sulfur deposition on a NOx catalyst while avoiding the emission of sulfur and a deterioration in the fuel consumption efficiency. A main catalyst 30 constituted by a NOx catalyst or an S tr...

A method and system are disclosed for controlling a lean burn engine coupled to an emission control device that stores oxidants during lean operation, and reacts the stored oxidants during stoichiometric or rich operation, the method comprising estimating ...

In an exhaust gas purifying system (1) for applying NOx purification by a NOx occlusion reduction type catalyst (42) and PM purification by a DPF (41) to the exhaust gas of an internal combustion engine, when it is judged that both regeneration of the DPF ...

The process involves measuring the rate of saturation of a nitric oxide trap (22) and the rate of blockage of a particle filter (24). The trap and the filter are arranged in an exhaust line of an internal combustion engine. The desulphation of the trap and...