Patent ID: 7178326

Claim:
An exhaust gas purifying apparatus for an internal combustion engine, the exhaust gas purifying apparatus comprising: a particulate filter that is arranged in an exhaust gas passage of the internal combustion engine to collect particulates contained in exhaust gas in the exhaust gas passage; a regeneration control means for regenerating the particulate filter by increasing a temperature of the particulate filter to combust and remove the particulates accumulated on the particulate filter; an EGR passage that recirculates a portion of the exhaust gas as EGR gas from the exhaust gas passage into an intake air passage of the internal combustion engine, which conducts intake air; and an EGR control means for controlling a temperature and a flow rate of the EGR gas, which is recirculated into the intake air passage through the EGR passage, based on a demand of the internal combustion engine, wherein the EGR control means includes a regeneration time EGR control means for executing an EGR operation for controlling the temperature and the flow rate of the EGR gas in regeneration time of the particulate filter, during which the particulate filter is regenerated by the regeneration control means, and the regeneration time EGR control means controls a degree of the EGR operation such that a temperature of the exhaust gas, which is supplied to the particulate filter, becomes a suitable temperature, which is suitable for regeneration of the particulate filter.