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:
Jan. 05, 2016
Filed:
Jun. 09, 2014
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventor:
Hideaki Ichihara, Obu, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B 33/44 (2006.01); F02D 41/00 (2006.01); F02M 25/07 (2006.01); F02D 13/02 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0077 (2013.01); F02D 13/0261 (2013.01); F02M 25/0707 (2013.01); F02M 25/0746 (2013.01); F02D 2041/001 (2013.01); F02M 25/0788 (2013.01);
Abstract
When the engine is in a specified operation state in which the EGR valve is brought into the full-close condition, the holding force for holding the EGR valve at the full-close position is corrected by correcting the control duty signal of the EGR valve. The control duty signal is corrected according to the target valve overlap quantity or the target phase of the valve timing. Thus, even when a proper holding force of the EGR valve is varied due to a variation in differential pressure between the intake pressure and the exhaust pressure, the holding force of the EGR valve is corrected to be a proper holding force.