EXHAUST GAS PURIFICATION DEVICE FOR DIESEL ENGINE

摘要

The purpose of the present invention is to provide an exhaust gas purification device for a diesel engine, the exhaust gas purification device being configured so that the performance of a NOx reduction and purification catalyst is improved and so that the breakage of the catalyst caused by the entry of a reduction agent into a support member for the catalyst is prevented. In order to obtain such an exhaust gas purification device, a retainer (11) and the upstream end surface (5a) of an SCR (5) are separated from each other, the retainer (11) rising from the inner surface (10) of a connection pipe (8B) so as to extend in the circumferential direction, the connection pipe (8B) being located between an injection nozzle (7) for injecting a urea aqueous solution and the upstream end surface (5a) of the SCR (5).