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:
Jun. 29, 2004
Filed:
Jun. 18, 2002
Denso Corporation, Aichi, JP;
Abstract
The permeability of a DPF mounted on a diesel engine is evaluated by calculating the apparent passage area (A) based upon a difference in the pressure between the upstream and the downstream sides of the DPF and upon other engine data, an alarm is given to a driver based on the results of evaluation, and the operation mode is changed over to regenerate the DPF . An abnormal increase in the passage area caused by breakage is accurately detected, and it does not happen that the PM is released into the open air for extended periods of time due to the breakage of the DPF . Further, without the need of dismantling the DPF , the DPF can be reliably burned and regenerated without being undesirably overheated in every operation mode of the engine