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:
Nov. 26, 1991
Filed:
Jan. 22, 1990
Nobukazu Kanesaki, Kanagawa, JP;
Abstract
An exhaust particle removing system for an internal combustion engine includes two filters disposed within an exhaust passage in series for trapping particles suspended in exhaust gas. The system also includes combustion equipment which is disposed near the inlet of the upstream filter, and serves to burn off the particles deposited on the upstream filter. The downstream filter is coated with a catalyst. The downstream filter is arranged to be separate from the upstream filter by a predetermined distance so that the particles deposited on the downstream filter can be burned off by means of an elevated temperature of gas passing through the upstream filter. The length of each of the filters is essentially equal to or less than the diameter of the inlet of the respective filter.