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:
Feb. 10, 1998
Filed:
Jul. 18, 1995
Hiroyuki Taniguchi, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, JP;
Abstract
An exhaust gas purifier includes a filter for collecting particulates, a heater for firing collected particulates, a blower for feeding air, and a controller for controlling power supplied to the heater and air flow rate of the blower. The air flow rate is varied in a regeneration period for improving the regeneration efficiency and for protecting the filter. In one embodiment, the air flow rate is initially reduced in the burning period and increased after burning in the radial direction at the downstream portion of the filter. The burning propagation speed, the heat generation and the increase of the temperature of the filter are limited by suppressing the air flow rate in the burning period. The particulates remaining in the downstream portion of the filter due to the suppressed air flow rate supplied in the burning period can be burned subsequently by supplying an increased air flow rate after the burning period.