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. 03, 2013
Filed:
Aug. 03, 2010
Shuichi Yamada, Sakai, JP;
Yasuo Fujii, Sakai, JP;
Katsushi Inoue, Sakai, JP;
Yuuki Ishii, Sakai, JP;
Kenta Mitamura, Sakai, JP;
Shuichi Yamada, Sakai, JP;
Yasuo Fujii, Sakai, JP;
Katsushi Inoue, Sakai, JP;
Yuuki Ishii, Sakai, JP;
Kenta Mitamura, Sakai, JP;
KUBOTA Corporation, Osaka, JP;
Abstract
Provided is an exhaust-treatment device for a diesel engine, said device being capable of suppressing engine noise. In a first stage Pof an exhaust-temperature-raising process, a target engine speed is set to a prescribed first target speed Rand an intake throttle valveis set to a prescribed first degree of opening O. In a second stage P, the target engine speed is maintained at the first target speed Rand the intake throttle valveis set to a position more closed than the first degree of opening O. When a set duration Tfor the second stage Phas come to an end, the intake throttle valveis at a second degree of opening O, which is maintained in third and subsequent stages P/P. In said third and subsequent stages P/P, as a set duration T/Tfor each stage P/Ppasses, the target engine speed is updated to a target speed R/Rhigher than the target speed R/Rduring the immediately prior stage P/P, and the temperature of DPFupstream exhaust gasis increased.