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:
Jul. 08, 2014
Filed:
Mar. 02, 2011
Applicants:
Tadashi Uchiyama, Fujisawa, JP;
Hidekazu Fujie, Fujisawa, JP;
Mitsuhiro Aso, Fujisawa, JP;
Inventors:
Assignee:
Isuzu Motors Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a DPF failure detection method and a DPF failure detection device, which can be realized with a simple configuration and detect a failure at low cost. The theoretical deposited amount of PM on a DPFis calculated from the operating state of an internal combustion engine. The actual deposited amount of the PM on the DPFis measured based on the electrical capacitance of an electrical capacitance type PM sensor. When the divergence of the actual deposited amount from the theoretical deposited amount exceeds an allowable limit, it is determined that the DPFhas a failure.