Nixon Peabody LLP
Catalyst light-off method and device for direct injection engine
A catalyst light-off device for a direct injection engine comprises a temperature state identifier (31) for judging the temperature state of a catalyst (22) for converting exhaust gases, a fuel injection controller (33) for controlling fuel injection from an injector (11), and an ignition timing controller (35). When the catalyst is in its unheated state in which its temperature is lower than its activation temperature, the fuel injection controller (33) causes the injector (11) to make split injection during a period from an intake stroke to an ignition point including a later injection cycle which produces a mixture having local unevenness and an earlier injection cycle which produces a uniform and lean mixture, and the ignition timing controller (35) retards the ignition point.
Mazda Motor Corporation
F F F F F Y F Y F F
F02D F02D F02D F02B F02D Y02T F02P Y02T F02D F02D
inventional inventional additional additional inventional additional inventional additional inventional additional
Seiko Hiroyuki Keiji Youichi Hirofumi
Kono Yamashita Araki Kuji Nishimura