| 摘要 |
Disclosed is a regeneration method of an exhaust purification device for a vehicle capable of unitarily controlling the regeneration of a diesel particulate filter (DPF) for collecting particulate matters (PM), such as soot, contained in exhaust gas and the desulfurization of a lean NOx trap (LNT) for occluding nitrogen oxide (NOx). The regeneration method of the exhaust purification device for a vehicle in which a lean burn engine is applied and the LNT and the DPF are mounted on an exhaust manifold comprises: a step of determining whether or not vehicle information satisfies the regeneration conditions of the DPF; a step of regenerating the particulate matters till a set reference amount by increasing the temperature of the exhaust gas when the regeneration conditions of the DPF are satisfied; a step of maintaining the temperature of the LNT within a set reference temperature range when the regeneration of the DPF is reached to the set reference amount; a step of regenerating the DPF to remove the particulate matters which are not removed from the DPF during a lean burn process and desulfurizing the LNT in a rich burn process by repeatedly controlling the engine using the lean burn process and the rich burn process; and a step of controlling the engine with a normal burn process when the desulfurization of the LNT and the regeneration of the DPF are completed. [Reference numerals] (AA) Start; (BB,DD,FF) NO; (CC,EE,GG) YES; (HH) End; (S101) Detect vehicle information; (S102) Is it the regeneration conditions of a DPF?; (S103) Control the regeneration of the DPF; (S104) Monitor the regenerated state; (S105) Is it reached to the a set reference amount?; (S106) Maintain a LNT at a set temperature; (S107) Repeatedly control a lean burn process and a rich burn process; (S108) Simultaneously control the regeneration of the DPF and the desulfurization of the LNT; (S109) Is the regeneration of the DPF and the desulfurization of the LNT completed?; (S110) Normal control |
