Patent ID: 9027328
Filing Date: 2015-05-12
Classification: F01N,F02D,Y02T

Abstract:
1. An exhaust gas purification system for a vehicle comprising: an engine providing a lean burn; a lean NOx trap absorbing or adsorbing nitrogen oxide (NOx) included in exhaust gas exhausted from the engine, and purifying the absorbed or adsorbed nitrogen oxide by reduction; a particulate filter disposed downstream of the lean NOx trap and trapping particulate matter included in the exhaust gas exhausted from the engine; and a control unit controlling combustion of the engine, desulfurization of the lean NOx trap, and regeneration of the particulate filter, wherein the control unit regenerates the particulate filter by a reference amount (m wherein the control unit controls such that the engine is driven by only the lean burn so as to perform the regeneration of the particulate filter when the regeneration of the particulate filter is not completed even though desulfurization control of the lean NOx trap is completed.