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:
Jul. 05, 2005
Filed:
Oct. 03, 2003
Kenji Okamoto, Higashi-Matsuyama, JP;
Akira Kunishima, Higashi-Matsuyama, JP;
Kenji Okamoto, Higashi-Matsuyama, JP;
Akira Kunishima, Higashi-Matsuyama, JP;
Bosch Automotive Systems Corporation, Tokyo, JP;
Abstract
In a state in which a high-pressure control solenoid valve is driven to control the pressure in a common rail (refer to Step S), when the pressure in the common rail exceeds a predetermined value (refer to Step S), a driving current determined by a prescribed value map that defines the correlation between the pressure in the common rail and the driving current of the high-pressure control solenoid valve is corrected based on an actual pressure in the common rail and the driving current of the high-pressure control solenoid valve at the actual pressure (refer to Steps S, S). The corrected driving current is passed to the high-pressure control solenoid valve, thereby ensuring appropriate and stable injection control even when there exists a variation in operational characteristics among pressure control valves.