COMPRESSION IGNITION ENGINE AND EXHAUST SYSTEM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a compression ignition engine capable of increasing the concentration of carbon monoxide (CO) in an exhaust gas and heating an exhaust emission control catalyst due to heat generation reaction of CO.SOLUTION: There are provided a compression ignition engine capable of being operated in a first normal running mode and a second mode for generating the exhaust gas containing carbon monoxide (CO) of a level increased to be compared with the first mode, and a means switched between the two modes in use. The engine includes a carried palladium (Pd) catalyst relating to at least a kind of a base metal promotor and/or a carried platinum (Pt) catalyst arranged downstream of the Pd catalyst relating to the Pd catalyst at request. CO is oxidized with the Pd catalyst carried in operation of the second mode.