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. 03, 1996
Filed:
Sep. 20, 1995
Applicant:
Inventor:
Hisashi Kadowaki, Kariya, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02M / ; H02P / ;
U.S. Cl.
CPC ...
123571 ; 25112911 ; 318696 ;
Abstract
An internal combustion engine exhaust gas recirculation valve control apparatus which, during exhaust gas recirculation (EGR) control, can correct positional error due to stepping out of a stepping motor actuating an exhaust gas recirculation valve and effect EGR control with increased accuracy. A controller initializes the stepping motor during EGR control when the target opening degree of the exhaust gas recirculation valve becomes `fully closed` by driving the stepping motor to cause a valve body to abut a valve seat.