continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6472/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :24/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "DEVICE FOR THE REDUCTION OF NIRTROGEN OXIDES IN THE EXHAUST GAS TO
INTERNAL COMBUSTION ENGINES"
(51) International classification :F01N 3/20 (71)Name of Applicant :
(31) Priority Document No :10 2006 004 170.4 1)PIERBURG GMBH
(32) Priority Date :27/01/2006 Address of Applicant :ALFRED-PIERBURG-STRASSE 1,
(33) Name of priority country :Germany 41460 NEUSS, GERMANY. Germany
(86) International Application No
:PCT/EP07/050786 2)TECHNISCHE UNIVERSITAT KAISERSLAUTERN
Filing Date
:26/01/2007 (72)Name of Inventor :
(87) International Publication No :WO 2007/085646 1)HEINRICH DISMON
(61) Patent of Addition to Application Number :NA
2)ANDREAS KOSTER
Filing Date
:NA
3)ROLF LAPPAN
(62) Divisional to Application Number :NA
4)MARTIN NOWAAK
Filing Date
(57) Abstract :
:NA
5)WERNER MULLER
A device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines has a thermolysis reactor (10). In the
thermolysis reactor (10), urea is converted into ammonia and isocyanic acid by means of the supply of heat. In a preferred
embodiment of the invention, the thermolysis reactor (10) is arranged within the exhaust gas duct (26) and is thermally coupled to an
oxidation catalytic converter (30) which is connected upstream of the thermolysis reactor (10) in the flow direction. As a result of the
exothermic reactions taking place in the oxidation catalytic converter (30), it is possible for heating of the thermolysis reactor (10) to
take place. In order to further increase the temperature, it is possible for fuel to be injected into the oxidation reactor (30) by means of
a fuel supply device (40). Said fuel is burned catalytically in the oxidation catalytic converter (30).
No. of Pages : 17 No. of Claims : 12
The Patent Office Journal 24/10/2008 25940