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. 24, 2015
Filed:
Jun. 22, 2012
Applicants:
Hiroyuki Takezoe, Kariya, JP;
Hiroki Nogami, Kariya, JP;
Hideaki Ichihara, Obu, JP;
Hiroshi Katsurahara, Okazaki, JP;
Inventors:
Hiroyuki Takezoe, Kariya, JP;
Hiroki Nogami, Kariya, JP;
Hideaki Ichihara, Obu, JP;
Hiroshi Katsurahara, Okazaki, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 25/07 (2006.01); F02D 41/00 (2006.01); F02D 9/02 (2006.01); F02D 41/20 (2006.01);
U.S. Cl.
CPC ...
F02M 25/0793 (2013.01); F02D 41/0077 (2013.01); F02M 25/0756 (2013.01); F02M 25/0773 (2013.01); F02D 9/02 (2013.01); F02D 41/20 (2013.01); F02M 25/0727 (2013.01); F02D 2041/2058 (2013.01); F02D 2200/1012 (2013.01); F02D 2250/16 (2013.01); Y02T 10/47 (2013.01);
Abstract
When a constant driving voltage is applied to a motor driving an EGR valve so that the EGR opening degree is varied, an angular speed of the EGR valve becomes minimal at a position where the driving torque of the EGR valve becomes maximal. In view of this, while an opening degree of the EGR valve is varied with a constant driving voltage applied to the motor, the EGR opening degree where the angular speed becomes minimal is learned as a full-close position.