The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2002
Filed:
Mar. 30, 2000
Hirofumi Nishimura, Fuchu-cho, JP;
Youichi Kuji, Fuchu-cho, JP;
Seiko Kono, Fuchu-cho, JP;
Hiroyuki Yamashita, Fuchu-cho, JP;
Keiji Araki, Fuchu-cho, JP;
Mazda Motor Corporation, Hiroshima-ken, JP;
Abstract
A catalyst light-off device for a direct injection engine comprises a temperature state identifier ( ) for judging the temperature state of a catalyst ( ) for converting exhaust gases, a fuel injection controller ( ) for controlling fuel injection from an injector ( ), and an ignition timing controller ( ). When the catalyst is in its unheated state in which its temperature is lower than its activation temperature, the fuel injection controller ( ) causes the injector ( ) 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 ( ) retards the ignition point.