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:
Sep. 17, 2002
Filed:
Feb. 09, 2001
Youichi Kuji, Hiroshima-ken, JP;
Masayuki Kuroki, Hiroshima-ken, JP;
Junichi Taga, Hiroshima-ken, JP;
Kazuya Yokota, Hiroshima-ken, JP;
Keiji Araki, Hiroshima-ken, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
In steps S to S in order to activate an inactive catalyst earlier, the air-fuel ratio in a combustion chamber is set to be &lgr;≈1 during a period T after engine start until catalyst light-off at around 50% HC purifying ratio immediately after the HC purifying ratio begins to rapidly rise, before the catalyst warms up, divisional injection is made at least during the period T required until light-off is reached, and a swirl is weakened during the period T compared to a latter period which follows this period T The divisional injection is made and the swirl is strengthened even during the latter period.