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. 02, 2008
Filed:
May. 24, 2004
Kenichi Machida, Atsugi, JP;
Kenichi Machida, Atsugi, JP;
Hitachi, Ltd., Tokyo-To, JP;
Abstract
In an internal combustion engine equipped with a variable valve operating mechanism that performs a valve timing control and a valve lift amount control of at least one of an intake valve and an exhaust valve, target values of the valve timing and the valve lift amount set based on an engine operating condition are limited by a limit value to limit a control range of one of the valve timing and the valve lift amount in accordance with a control state of the other of the valve timing and the valve lift amount, so that the valve timing and the valve lift amount are controlled based on the respective target values one of which has been limited as above.