CONTROL DEVICE FOR DIRECT INJECTION ENGINE

摘要

To reduce the amounts of HC, NOx and other emissions from a direct injection engine when a catalyst is still in its unheated state, and to promote catalyst quick light-off operation by increasing the temperature of exhaust gases. The fuel injection controller (33) controls the injector (11) based on results from a temperature state identifier (31) in such a way that the injector (11) makes at least two-step split injection during a period from an intake stroke to an ignition point including a later injection cycle performed in a middle portion of a compression stroke or later and an earlier injection cycle performed prior to the later injection cycle at least in a low-load when the catalyst (22) is in its unheated state.