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. 28, 1999
Filed:
Mar. 19, 1998
Toyoo Yamada, Tokyo, JP;
Yamada Corporation, Tokyo, JP;
Abstract
A vehicle exhaust-gas purifier adapted for use on a testing line in a repair shop or the like is provided, wherein exhaust gases emitted from an engine of a vehicle are gathered directly from the vehicle and emitted into the environment after being purified. The vehicle exhaust-gas purifier is provided with a mechanism for preventing deterioration of catalysts used for reducing gaseous pollutants in the exhaust gases. The purifier has an exhaust-gas gathering nozzle A which is detachably connected to an exhaust pipe of an engine of a vehicle. The exhaust gases are introduced through the exhaust-gas gathering nozzle A and an inlet C into a purifier housing. Then, any carbon particles and unburned fuel mist particles are removed from the exhaust gases through a filter chamber 10, and then the major gaseous pollutants, HC, NO.sub.x, and CO, are removed from the exhaust gases through a catalyst chamber 20. The filter chamber 10 has a filter unit 11 and an electrostatic dust collecting unit 12 provided therein. Any carbon particles and unburned fuel accumulated on the electrostatic dust collecting unit 12 are removed therefrom in a cleaning chamber 40 so as to refresh the electrostatic dust collecting unit 12.