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:
Apr. 15, 2008
Filed:
Jun. 15, 2007
Applicants:
Takashi Yoshida, Hitachi, JP;
Yoshihiro Sukegawa, Hitachi, JP;
Inventors:
Takashi Yoshida, Hitachi, JP;
Yoshihiro Sukegawa, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 13/00 (2006.01); F01L 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
The operation modes of plural intake valvesandprovided in one cylinder is independently changed according to the drive region of the internal combustion engine. In the low air amount region, the intake airflow is controlled only with intake valvewhich operates in the low air amount region and the other intake valveis operated in the medium and high air amount regions.