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:
Dec. 30, 1997
Filed:
Jul. 26, 1995
Akio Kawaguchi, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A method for regenerating a particulate collection filter by the use of a regenerative gas according to the present invention comprises a step for causing particulate combustion in only the downstream part of said filter in the flow of the regenerative gas by the use of the regenerative gas, and a step for causing the particulate combustion in the downstream part of the filter to propagate toward the upstream part of the filter in the flow of the regenerative gas. Therefore, the direction of propagation of the combustion is opposite to the direction of the flow of the regenerative gas so that only part of the particulate combustion heat in each part of the filter is transferred upstream. Accordingly, each part of the filter will not become too hot.