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:
Nov. 20, 2001
Filed:
Feb. 18, 2000
Gerd Kraemer, Baierbrunn, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A method and apparatus is provided for determining the cylinder charge in the case of unthrottled internal-combustion engines with a variable valve gear. For determining the fresh-air cylinder charge in the case of such internal-combustion engines, the following steps are followed (i) at least one engine operating value is determined, (ii) a standardized air flow rate is determined relative to a defined inlet and outlet spread as a function of the at least one engine operating value, and (iii) the influence of the actual inlet spread existing in comparison to the defined inlet spread on the air flow rate is determined and a corrected air flow rate is calculated.