Patent ID: 7571601
Filing Date: 2009-08-11
Classification: B01D,F01N,F02D,Y02T

Abstract:
1. A method for controlling regeneration of the simultaneous NOx-PM reduction apparatus, the method comprising: detecting an exhaust gas differential pressure ΔP across the simultaneous NOx-PM reduction apparatus; determining whether the differential pressure is above a first predetermined differential pressure; determining whether the exhaust gas temperature of the engine lies in a predetermined temperature range, when the differential pressure ΔP is above the first predetermined differential pressure; performing a third post-injection by a predetermined third injection amount and a predetermined third retardation angle of fuel injection, when the exhaust gas temperature of the engine does not lie in the predetermined temperature range; determining whether a predetermined mild regeneration finishing condition is satisfied, when the exhaust gas temperature of the engine lies in the predetermined temperature range; determining whether a predetermined strong regeneration starting condition is satisfied, when the mild regeneration finishing condition is satisfied; performing a normal main fuel injection, the third post-injection, and a fourth post-injection by a fourth injection amount and a fourth retardation angle of fuel injection, when the predetermined strong regeneration starting condition is satisfied; determining whether a predetermined strong regeneration finishing condition is satisfied.