Patent ID: 6763659
Filing Date: 2004-07-20
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
An exhaust emission control device for an internal combustion engine, comprising:a particulate filter for capturing the particulate matter in an exhaust gas, the particulate filter disposed in an exhaust system for the internal combustion engine; a deposit amount detecting section for detecting a deposit amount correlation value of the particulate matter captured by the particulate filter; a temperature detecting section for detecting a temperature correlation value of the particulate filter; an idle detecting section for detecting whether or not the internal combustion engine is in an idle driving state; an idle rotating speed control section for controlling the rotating speed of the internal combustion engine to be a target idle rotating speed when the internal combustion engine is in the idle driving state; and a correction section for correcting the target idle rotating speed to the higher rotating speed to suppress overheating of the particulate filter in accordance with detection results of the deposit amount detecting section, the temperature detecting section, and the idle detecting section.