Exhaust gas-purifying device

Abstract

An exhaust emission control device with less electricity consumption comprises a cylindrical outer electrode 7 extending in a direction of flow of exhaust G, a plurality of inner electrodes 5 and 6 constituted by electrically conductive filters capable of capturing particulates and aligned in the direction of flow of the exhaust G within an outer electrode 7 , captured particulate amount estimating means 2 for estimating captured particulate amounts of the respective inner electrodes 5 and 6 and an electric discharge controller 3 for supplying electric power for generation of electric discharge to the outer electrode 7 and any of the inner electrodes 5 and 6 on the basis of calculated values of the estimating means 2.

1 . An exhaust emission control device comprising an integral electrode extending in a direction of flow of exhaust gas, a plurality of divided electrodes constituted by electrically conductive filters capable of capturing particulates and aligned in the direction of flow of the exhaust and an electric discharge controller for supplying electric power for generation of electric discharge to the integral electrode and to any of the divided electrodes.  
   
   
       2 . The exhaust emission control device as claimed in  claim 1  further comprising captured amount estimating means for estimating particulate amounts captured by the respective divided electrodes, the integral electrode and any of the divided electrodes being supplied with electric power for generation of electric discharge on the basis of calculated values of the estimating means.  
   
   
       3 . An exhaust emission control device comprising an integral electrode extending in a direction of flow of exhaust gas, a plurality of divided electrodes aligned in the direction of flow of the exhaust, a filter between both of the electrodes and capable of capturing particulates and an electric discharge controller for supplying electric power for generation of electric discharge to the integral electrode and any of the divided electrodes.  
   
   
       4 . The exhaust emission control device according to  claim 3  further comprising captured amount estimating means for estimating distribution of a captured particulate amount on the filter, the integral electrode and any of the divided electrodes being supplied with electric power for generation of electric discharge on the basis of calculated amounts of the estimating means.