Honda Motor Assigned Patent

08/23/2011

By Targeted News Service



ALEXANDRIA, Va., Aug. 23 -- Honda Motor, Tokyo, has been assigned a patent (7,997,070) developed by Yuji Yasui, Saitama-ken, Japan, and Ikue Kawasumi, Saitama, Japan, for an "exhaust emission control device for internal combustion engine."



The abstract of the patent published by the U.S. Patent and Trademark Office states: "An exhaust emission control device for an internal combustion engine, capable of supplying a just enough amount of reducing agent to a selective reduction catalyst even when a NOx purification ratio of the catalyst is changed by various causes, thereby enabling a high NOx purification ratio and very low exhaust emissions to be maintained. An ECU calculates a filtered value based on a signal from an exhaust gas concentration sensor, calculates a moving average value of a product of the filtered value and a reference input, calculates a control input such that the moving average value becomes equal to 0, and adds a reference input to the control input to calculate an FB injection amount. The ECU calculates an FF injection amount with a predetermined feedforward control algorithm, and adds the FF injection amount to the FB injection amount, to thereby calculate a urea injection amount."



The patent application was filed on June 6, 2008 (12/134,670). The full-text of the patent can be found at http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7,997,070.PN.&OS=PN/7,997,070&RS=PN/7,997,070



Written by Shabnam Sheikh; edited by Jaya Anand.



Source;

http://www.power-eng.com/news/2011/08/1484687165/honda-motor-assigned-patent.html