Patent ID: 7043903

Claim:
A control method of an exhaust gas purification system, in an internal combustion engine mounted on a vehicle provided with a continuous regeneration-type diesel particulate filter in the exhaust gas passage thereof, having a diesel particulate filter control means including: a collecting quantity detection means for detecting the collecting quantity of collected matters in the continuous regeneration-type diesel particulate filter; a forced regeneration control means for performing multi-injection in the control of fuel injection into cylinder for raising exhaust gas temperature, burning forcibly the collected matters and thereby regenerating the continuous regeneration-type diesel particulate filter; a warning means for urging a warning for prompting a driver to actuate the forced regeneration control means, in a case of detecting that the collecting quantity detected by the collecting quantity detection means is higher than a predetermined judgment collecting quantity; and a travel distance detection means for detecting a travel distance of the vehicle; wherein said diesel particulate filter control means comprises an exhaust gas temperature raising control means for performing an exhaust gas temperature raising control by at least one of multi-injection or post-injection in the control of fuel injection into cylinder in a case where the collecting quantity detected by the collecting quantity detection means exceeds a predetermined first temperature rising judgment collecting quantity lower than a predetermined judgment collecting quantity and, thereafter, for stopping the exhaust gas temperature raising control by at least one of multi-injection or post-injection in the control of fuel injection into cylinder in a case where the collecting quantity detected by the collecting quantity detection means becomes lower than a predetermined second temperature rising judgment collecting quantity lower than the predetermined first temperature rising judgment collecting quantity; and wherein said diesel particulate filter control means is composed not to urge by the warning means, in a case where it is judged that the travel distance after the collection starts detected by said travel distance detection means has not attained a predetermined judgment travel distance, even if it is detected that the collecting quantity detected by the collecting quantity detection means is larger than the predetermined judgment collecting quantity.