exhaust smoke purification device of diesel engine

摘要

The present invention relates to an exhaust purification device of a diesel engine, the flow control of the exhaust gas passing through the filter and to reduce the fuel consumption in the filter regeneration by the filter regeneration to be rapidly made in a short period of time, with, in the filter regeneration process, the oxygen concentration increases and the exhaust flow is reduced, the thermal damage to the filter of the filter when heated to high temperature relates to an exhaust purification device of a diesel engine for controlling the flow of the exhaust gas to prevent. ; exhaust purification device of a diesel engine for controlling the flow of the exhaust gas according to the present invention (A) is equipped with a catalytic converter and filter in a housing provided in the exhaust gas discharge pipe of the diesel engine is to collect the particulate contained in the exhaust gas discharged from a diesel engine as a filter, the concentration of the soot trapped in the filter in a predetermined degree or more In the high temperature of the exhaust purification system of a diesel engine to run out the oxidation of soot collected on the filter in the housing through the exhaust gas as the fuel is discharged artificially added to the combustion chamber of a diesel engine injection, ; housing ( 10) in the filter (30) back to the degree of thermal expansion is relatively small front body 41 and the degree of thermal expansion is relatively large and the tetrahedron 42 is made of a curved surface of the joint is cut off to form the thermal expansion in the center 700-1000 plate 40 is characterized in that is provided.