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:
Oct. 20, 2015
Filed:
Aug. 22, 2011
Kazunari Ide, Tokyo, JP;
Yoshikatsu Ikawa, Tokyo, JP;
Kazunari Ide, Tokyo, JP;
Yoshikatsu Ikawa, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
An exhaust gas purification system includes a feedforward controller, a feedback controlleroutputting a correcting variable for achieving a target temperature of DPF, and a variable adding unitthat adds the correcting variable output from the feedback controllerto a basic variable output from the feedforward controllerto compute a manipulated variable. The system further includes either one of an integrator resetterthat resets the integral value of an integrator that forms the feedback controllerwhen the amount of exhaust gas has suddenly dropped, and a basic variable calculating unit that calculates the basic variable to be output from the feedforward controller based on a signal representing the flow rate of exhaust gas.