EXHAUST PURIFICATION DEVICE OF DIESEL ENGINE

摘要

PURPOSE:To effectively perform regeneration by surely increasing an exhaust temperature at the time of regenerating a filter without especially providing a new temperature increasing device. CONSTITUTION:A waste gate valve 21 is properly controlled to match the oxygen concentration detected from an oxygen concentration sensor 35 with the oxygen concentration at the time when an intake air quantity is suppressed to the minimum without deteriorating the operation condition of an engine.