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. 04, 2007
Filed:
Aug. 08, 2003
Toshihiro Hamahata, Saitama, JP;
Shoko Tanida, Higashimatsuyama, JP;
Toru Hasegawa, Higashimatsuyama, JP;
Toshihiro Hamahata, Saitama, JP;
Shoko Tanida, Higashimatsuyama, JP;
Toru Hasegawa, Higashimatsuyama, JP;
Bosch Automotive Systems Corporation, Tokyo, JP;
Abstract
In an exhaust gas cleaning apparatus () in which a before and after differential pressure (ΔP) of a filter () used to trap particulates is detected for regeneration of the filter (), a time at which, during filter regeneration, the temperature of the outlet section of the filter () falls below the temperature of the inlet section thereof (ΔT>M), using a first temperature sensor () and a second temperature sensor (), is determined as being the timing of the completion of the regeneration of the filter (). The value of the before and after differential pressure (ΔP) at the time of this regeneration completion is used to estimate the quantity of residual ash in the filter (), and when this estimated residual ash quantity is the same as, or greater than, a prescribed value (PX), a replacement warning signal (K) is output urging replacement of the filter ().