CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE (AS AMENDED)

摘要

There is provided a control device for an internal combustion engine provided with a filter on the downstream side of a catalyst having an oxidation function, the device including: a control unit performing oxygen concentration reduction control for reducing the oxygen concentration of exhaust gas flowing into the catalyst based on an exhaust temperature increase request on the downstream side of the catalyst made when regeneration of the filter is performed, in which the control unit is provided with means for acquiring an S concentration value of a fuel combusted in the internal combustion engine, and in which the oxygen concentration is set based on the S concentration value. Accordingly, the white smoke resulting from combination between SO3 and H2O can be suppressed while filter regeneration is performed.

主权项

1. A control device for an internal combustion engine, the internal combustion engine including
a catalyst having an oxidation function, an a filter disposed on the downstream side of the catalyst, the control device comprising an electronic control unit configured to i) perform oxygen concentration reduction control based on an exhaust temperature increase request on a downstream side of the catalyst made when regeneration of the filter is performed, the oxygen concentration reduction control being control for reducing the oxygen concentration of exhaust gas flowing into the catalyst, ii) acquire a sulfur concentration value of a fuel combusted in the internal combustion engine, and iii) set the oxygen concentration based on the sulfur concentration value.