Patent ID: 8978365
Filing Date: 2015-03-17
Classification: B01D,F01N,F02D,F02M,Y02A,Y02T

Abstract:
1. An exhaust gas purification system in which a diesel particulate defuser for trapping particulate matter in exhaust gas is connected to an exhaust pipe of a diesel engine to automatically regenerate the diesel particulate defuser by raising a temperature of the exhaust gas from a diesel engine by carrying out post injection by injecting diesel fuel into a cylinder of the engine when an amount of the particulate matter in the diesel particulate defuser exceeds a predetermined amount, the system comprising: detecting the temperature of the exhaust gas during diesel particulate defuser regeneration when the diesel particulate defuser is automatically regenerated; calculating a deviation between the detected temperature of the exhaust gas and a target temperature for the diesel particulate defuser regeneration; and controlling a quantity of the post injection by resetting an integral control term used in a proportional-integral-derivative control to zero when running mode automatic regeneration is shifted to idling mode automatic regeneration after a vehicle is stopped, when proportional-integral-derivative-controlling the quantity of the post injection based on the deviation.