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. 11, 2011
Filed:
Apr. 09, 2008
Shinichi Sugihara, Higashi-hiroshima, JP;
Shinichi Sugihara, Higashi-hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
Methods and systems for controlling an internal combustion engine are provided. The method may include opening and closing an intake valve respectively at first opening and closing timings of a cylinder cycle during an engine start when a temperature of the internal combustion engine is below a predetermined temperature, and opening and closing the intake valve respectively at second opening and closing timings of a cylinder cycle during an engine start when a temperature of the internal combustion engine is above the predetermined temperature. The second closing timing may be later than the first closing timing and after a bottom dead center of an intake stroke of the cylinder cycle. The second opening timing may be earlier than the first opening timing, and a difference between the first and second closing timings may be greater than a difference between the first and second opening timings.