Patent ID: 9028598
Filing Date: 2015-05-12
Classification: B01D,F01N,F02B,F02D,F02M,F02N,Y02T

Abstract:
1. An exhaust gas purifying system for a diesel engine that carries out idle stop to automatically stop the diesel engine during an idling operation, the exhaust gas purifying system comprising: a diesel particulate filter (DPF) disposed in an exhaust system of an engine and serving to trap particulate matter present in exhaust gas; and a controller configured to control: a DPF regeneration section to execute DPF regeneration for the diesel particulate filter by raising a temperature of the DPF when a predetermined DPF regeneration condition is satisfied: a DPF regeneration interruption section to interrupt the DPF regeneration and to execute idle stop in a case where shift to the idling operation is carried out during the DPF regeneration; a DPF regeneration restart section to restart the DPF regeneration after the engine is automatically restarted from interruption of the DPF regeneration; and a correction section to correct DPF regeneration control so as to suppress temperature rise due to the DPF regeneration in consideration of an increment in oxygen concentration in the exhaust gas which is caused due to idle of the engine during idle stop, when the DPF regeneration is restarted.