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:
Feb. 13, 2007
Filed:
Jun. 13, 2005
Junichi Kaneko, Saitama, JP;
Toshiko Okazaki, Saitama, JP;
Junichi Kaneko, Saitama, JP;
Toshiko Okazaki, Saitama, JP;
Bosch Automotive Systems Corporation, Tokyo, JP;
Abstract
In an electronic control unit, a duty conversion mapfrom which a driving duty in energizing and driving an electromagnetic coil, not shown, of an electromagnetic vacuum adjustment valveon the basis of a variable equivalent to target quantity of feedback of exhaust gas, for example, the magnitude of a desired negative pressure to a negative pressure output port (not shown) of the electromagnetic vacuum adjustment valve, and a duty correction mapfrom which a correction value for the driving duty is acquired on the basis inputted battery voltage and engine cooling water temperature, are provided. The driving duty is multiplied by the correction value acquired from the duty correction map, and on the basis of the corrected driving duty, energization to the electromagnetic vacuum adjustment valveis performed by a driving circuit