CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

A controller calculates a predicted value of the exhaust pressure between a catalyst and a filter for a case in which engine fuel containing no manganese is used continuously. Also, the controller calculates a correlation value proportional to the amount of heat received by the catalyst when the catalyst temperature is higher than or equal to the adhesion temperature of manganese oxide. Further, the controller determines that there is a removal requirement for removing manganese oxide from the catalyst when the difference between the predicted value and the detected pressure of the exhaust pressure between the catalyst and the filter is greater than a specified determination value, and the correlation value is greater than or equal to a specified determination value. The controller executes the removal process by performing fuel amount increase control when it is determined that there is a removal requirement. 一种控制装置，算出持续使用不含锰的内燃机燃料的情况下的催化剂与过滤器之间的排气压力的预测值。另外，控制装置算出在催化剂的温度为锰氧化物的粘着温度以上时与催化剂接受了的热量成比例的相关值。另外，控制装置