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:
Mar. 28, 2006
Filed:
Mar. 15, 2005
Applicant:
Hirokazu Shimizu, Isesaki, JP;
Inventor:
Hirokazu Shimizu, Isesaki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 43/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
When a detection value of an intake pressure is normal, an electronically controlled throttle is controlled to attain a target intake pressure, a variable valve mechanism is controlled to attain a target intake air amount, and the control of the variable valve mechanism is corrected based on the detection value of the intake pressure. Contrary to this, when the detection value of the intake pressure is abnormal, the electronically controlled throttle is controlled to attain the target intake air amount, and also, the variable valve mechanism is controlled based on a fixed target opening characteristic.