Patent ID: 8475754

Claim:
A device for exhaust gas purification for internal combustion engines, the device comprising: a control unit, a switching device ( 1 ), a counter-current heat exchanger ( 3 ), and at least one exhaust gas purification component ( 2 ), wherein the switching device ( 1 ), the at least one exhaust gas purification component ( 2 ) and the counter-current heat exchanger ( 3 ) are arranged in succession, the switching device ( 1 ) is continuously or abruptly adjustable between first and second positions, and in the first position of the switching device ( 1 ), a flow path ( 6 ) of the exhaust gas to the at least one exhaust gas purification component ( 2 ) is opened, and in the second position of the switching device ( 1 ), a flow path ( 6 ) of the exhaust gas to the at least one exhaust gas purification component ( 2 ) is blocked so that the exhaust gas flows along a further flow path ( 7 ) in inlet channels ( 8 ) of the counter-current heat exchanger ( 3 ), where the exhaust gas is heated and from where the exhaust gas is conveyed, via a flow path ( 20 ) of the at least one exhaust gas purification component ( 2 ), and after passing the exhaust gas purification component, exits the exhaust gas purification unit ( 5 ) through the outlet channels ( 4 ) of the counter-current heat exchanger ( 3 ), and the switching device ( 1 ), the at least one exhaust gas purification component ( 2 ), the counter-current heat exchanger ( 3 ) and the flow paths ( 6 , 7 , 19 , 20 ) are all integrated in an exhaust gas treatment unit ( 5 ).