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:
Dec. 05, 2000
Filed:
Jun. 30, 1999
Applicant:
Inventors:
Hong Zhang, Regensburg, DE;
Frank Hacker, Regensburg, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60284 ; 60285 ; 60286 ; 60304 ; 60305 ;
Abstract
By taking into account the deviation between a desired value, determined from a model for a secondary-air mass flow and an actual value of the secondary-air mass flow, detected by an airflow sensor, a correction value is obtained. From the correction value, together with a main-air mass flow that is present in an intake tract of the internal combustion engine and a pilot control value for an air/fuel ratio, a correction factor for correcting an injection duration is derived.