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. 19, 2013
Filed:
Aug. 26, 2009
Hiroyuki Nishimura, Fuchu-cho, JP;
Yoshiaki Tomita, Hiroshima, JP;
Masato Katsuta, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
An exhaust emission control system, which comprises control meansoperable, in response to satisfaction of a given stop condition, to automatically stop an engine, and subsequently, in response to satisfaction of a given restart condition, to automatically restart the automatically stopped engine, a flow passageadapted for an aqueous urea solution for reducing nitrogen oxides contained in exhaust gas of the engine, and supply/recovery meansadapted to drive a pumpto supply an aqueous urea solution to the flow passage and recover an aqueous urea solution from the flow passage. The control means is operable, when the engine is forcibly stopped by turning off an ignition switch, to instruct the supply/recovery meansto recover an aqueous urea solution from the flow passage, and, when automatically stopping the engine in response to satisfaction of the given stop condition, to prohibit the supply/recovery meansfrom recovering an aqueous urea solution from the flow passage