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:
Sep. 14, 2010
Filed:
Nov. 08, 2007
Applicants:
Yasuhiro Kariya, Oobu, JP;
Shigeto Yahata, Oobu, JP;
Kazuharu Tochikawa, Kariya, JP;
Inventors:
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A diagnostic apparatus monitors a pressure difference detection apparatus that detects the pressure difference across an engine exhaust gas cleansing device in an exhaust gas system, with the diagnostic apparatus recognizing a condition of impeded transfer of gas between the pressure difference detection apparatus and the exhaust gas system, based upon a manner of convergence of successive detected pressure difference values that are produced by the pressure difference detection apparatus following a change in the exhaust gas flow rate.