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:
Mar. 22, 2011
Filed:
Dec. 19, 2007
Chun Tai, Hagerstown, MD (US);
Chun Tai, Hagerstown, MD (US);
Mack Trucks, Inc, Greensboro, NC (US);
Abstract
A method for controlling injection of a substance in a diesel engine exhaust after treatment system includes generating a feedforward signal as a function of a desired output signal, the desired output signal corresponding to an output sought to be achieved through injection of the substance. Actual system output is measured and an actual output signal is generated corresponding to an output actually achieved through injection of the substance. The desired output signal and the actual output signal are compared and an error signal is generated corresponding to a difference between the desired output signal and the actual output signal. A control signal is generated as a function of the error signal and the feedforward signal for controlling an amount of the substance to inject, and the feedforward signal is adjusted by an adaptive factor, the adaptive factor being a function of the error signal. A diesel engine is also provided.