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:
Sep. 21, 2010
Filed:
Sep. 10, 2008
Hideharu Takamiya, Saitama, JP;
Seiichiro Irie, Saitama, JP;
Yutaka Kouda, Saitama, JP;
Isao Komoriya, Saitama, JP;
Hideharu Takamiya, Saitama, JP;
Seiichiro Irie, Saitama, JP;
Yutaka Kouda, Saitama, JP;
Isao Komoriya, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control for an engine having a variable valve actuation mechanism is provided. A map indicating a correlation among a rotational speed, a gauge pressure of an intake manifold, a lift amount of an intake valve, a phase of the intake valve and an intake air amount of the engine under a reference condition of a predetermined reference atmospheric pressure and a predetermined reference intake air temperature is defined. An intake air amount for the reference condition is determined as a reference intake air amount by referring to the map based on a current rotational speed, a current gauge pressure, a current lift amount and a current phase. The reference intake air amount is corrected with a ratio between an air density under a current condition of a current atmospheric pressure, a current intake air temperature and a current gauge pressure and an air density under the reference condition to calculate an intake air amount for the current condition.