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. 07, 2009
Filed:
Jan. 25, 2007
Ryo Miyakoshi, Isesaki, JP;
Kenichi Machida, Isesaki, JP;
Takahiro Yoshino, Yokosuka, JP;
Masahiro Arai, Yokohama, JP;
Hatsuo Nagaishi, Zushi, JP;
Ryo Miyakoshi, Isesaki, JP;
Kenichi Machida, Isesaki, JP;
Takahiro Yoshino, Yokosuka, JP;
Masahiro Arai, Yokohama, JP;
Hatsuo Nagaishi, Zushi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
At the time of obtaining a difference in intake air amount between right and left banks in a V-type engine, a target value of a lift-amount/operation-angle-varying mechanism provided for each of the banks is set to a target value at which flow velocity of intake air passing through an intake valve becomes almost sound velocity. In a state in which the flow velocity of intake air passing through the intake valve becomes almost sound velocity, a difference in the intake air amount in the right and left banks is detected and, to reduce the difference, a correction value for a target value of a valve lift is set for each of the banks.