| 主权项 |
1. A control apparatus for an internal combustion engine, comprising:
a particulate filter that is installed in an exhaust passage of the internal combustion engine and traps particulate filter; and a controller that is programmed to: produce NO2 in exhaust gas supplied to the particulate filter; estimate an NO2-based regeneration speed that is a speed of regeneration of the particulate filter using NO2, during operation of the internal combustion engine; determine whether or not an operating state in which the NO2-based regeneration speed is higher than a predetermined threshold value is established during operation of the internal combustion engine; and change an engine control parameter so that when determining that the operation state in which the NO2-based regeneration speed is higher than the threshold value is established, an amount of NO2 supplied to the particulate filter and a temperature of the particulate filter are increased, wherein the controller determines that the operating state in which the NO2-based regeneration speed is higher than the threshold value has been established when a present temperature of the particulate filter is higher than a predetermined temperature threshold value and a present amount of accumulation of particulate matter in the particulate filter is larger than a predetermined accumulation amount threshold value and a present amount of NO2 flown into the particulate filter is larger than a predetermined NO2 amount threshold value. |
