Exhaust gas flow equalizer

Abstract

The invention relates to an exhaust gas flow equalizer installed in an exhaust manifold and to an exhaust manifold with such an equalizer installed therein. The invention also relates to the manufacture and use of the exhaust gas flow equalizer and the exhaust manifold. The exhaust gas flow equalizer ( 2 ) according to the invention includes catalytic corrugated metal plates ( 2 f ) placed cross-wise to each other with the corrugation direction of their folds being in an angle towards the average flow direction of the exhaust gas (G) for equalizing the exhaust gas flow at least in the lateral direction.

1 - 19 . (canceled) 
   
   
       20 . An exhaust gas flow equalizer having at least two exhaust gas inlet channels ( 3 ) to be installed in an exhaust manifold, characterized in that the exhaust gas flow equalizer ( 2 ) comprises catalytic corrugated metal plates ( 2   f ) placed cross-wise to each other with the corrugation direction of their folds being in an angle of 10-30 degrees towards the average flow direction of the exhaust gas (G) and that the exhaust manifold ( 1 ) has between inlet channels ( 3 ) one or more exhaust gas flow mixing chambers ( 4 ), whose casing is at least a part of the exhaust manifold casing. 
   
   
       21 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the corrugation direction of the folds of the corrugated metal plates ( 2   f ) is in an angle of 15-25 degrees relative to the average exhaust gas (G) flow direction. 
   
   
       22 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the exhaust gas flow equalizer ( 2 ) has zones ( 2 A,  2 C) whose catalytic coating differs from each other. 
   
   
       23 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the exhaust gas flow equalizer ( 2 ) has zones ( 2 A,  2 C) whose hole number differs from each other. 
   
   
       24 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the corrugation direction of the folds of the corrugated plates ( 2   f ) changes in the flow direction (G), such as from 25 degrees to 20 degrees. 
   
   
       25 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the exhaust manifold ( 1 ) has additionally one or more separate catalysts connected thereto. 
   
   
       26 . An exhaust gas flow equalizer according to  claim 20 , characterized in that the exhaust manifold ( 1 ) has additionally one or more separate exhaust gas flow equalizers connected thereto. 
   
   
       27 . Motor exhaust manifold, characterized in that it comprises one or more exhaust gas flow equalizers ( 2 ) according to  claim 20 . 
   
   
       28 . The exhaust manifold according to  claim 27 , wherein the one or more exhaust gas flow equalizers ( 2 ) are installed in the inlet chamber/chambers ( 3 ). 
   
   
       29 . An exhaust manifold according to  claim 27 , wherein the one or more exhaust gas flow equalizers ( 2 ) are installed in a connecting part ( 7 ). 
   
   
       30 . The exhaust manifold according to  claim 27 , wherein the one or more exhaust gas flow equalizers ( 2 ) are installed in an outlet channel ( 5 ). 
   
   
       31 . The exhaust manifold according to  claim 27 , wherein a lambda sensor is connected to the exhaust manifold ( 1 ). 
   
   
       32 . A method for manufacturing an exhaust gas flow equalizer having at least two exhaust gas inlet channels ( 3 ) to be installed in an exhaust manifold, characterized in that the exhaust gas flow equalizer ( 2 ) is manufactured by connecting to each other catalytic corrugated metal plates ( 2   f ) placed cross-wise to each other with the corrugation direction of their folds being in an angle of 10-30 degrees towards the average flow direction of the exhaust gas and that one or more exhaust gas flow mixing chambers ( 4 ), whose casing is at least a part of the exhaust manifold casing, is composed to the exhaust manifold ( 1 ) between said inlet channels ( 3 ). 
   
   
       33 . The method for manufacturing an exhaust manifold, characterized in that one or more exhaust gas flow equalizers ( 2 ) according to  claim 20  are installed to an exhaust manifold.