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:
Jan. 06, 2004
Filed:
Oct. 16, 2001
Applicant:
Inventor:
Yoshihiro Majima, Inuyama, JP;
Assignee:
Denso Corporation, Aichi-pref., JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 4/114 ;
U.S. Cl.
CPC ...
F02D 4/114 ;
Abstract
When control conditions are satisfied, an A/F value is estimated from an average value of rotation speed Ne and an increasing rotation speed &Dgr;Ne calculated. The estimated A/F value as a base is obtained from the average value of the rotation speed Ne, and a correction value for the estimated A/F value is obtained from the increasing rotation speed &Dgr;Ne. Then, a fuel increment/decrement correction coefficient &ggr; and an air increment/decrement correction coefficient &bgr; are calculated, and used in the control of A/F ratio toward a target A/F value based on a final estimated A/F value.