Method and processor unit for operating an exhaust gas burner
A method ( 200 ) for operating an exhaust gas burner ( 120 ) in an exhaust section ( 102 ) of an internal combustion engine ( 110 ), comprising introducing a purging fluid comprising at least air ( 20 ) into the exhaust gas burner ( 120 ) during a purging operating phase ( 205 ), which lies outside the time of a normal operating phase ( 201 ) of the exhaust gas burner ( 120 ), and discharging a discharge mixture formed using the purging fluid from the exhaust gas burner ( 120 ), wherein the exhaust gas burner ( 120 ) is operated for the purpose of heating a component ( 130, 150 ) of the exhaust section ( 102 ) to its operating temperature during the normal operating phase ( 201 ). A processor unit ( 140 ) and a computer program for carrying out such a method ( 200 ) are furthermore proposed.
1. A method ( 200 ) for operating an exhaust gas burner ( 120 ) in an exhaust section ( 102 ) of an internal combustion engine ( 110 ), the method comprising:
introducing a purging fluid comprising at least air ( 20 ) into the exhaust gas burner ( 120 ) during a purging operating phase ( 205 ), which lies outside a time of a normal operating phase ( 201 ) of the exhaust gas burner ( 120 ), and
discharging a discharge mixture ( 22 ) formed using the purging fluid from the exhaust gas burner ( 120 ),
wherein the exhaust gas burner ( 120 ) is operated for a purpose of heating at least one component ( 130 , 150 ) of the exhaust section ( 102 ) to its operating temperature during the normal operating phase ( 201 ),
wherein the exhaust gas burner ( 120 ) is configured to be in fluid communication with the exhaust section ( 102 ) of the internal combustion engine ( 110 ), and
wherein a parameter of the purging operating phase is determined ( 203 ) as a function of an operating parameter of the exhaust gas burner ( 120 ) determined during the normal operating phase ( 201 ).
2. The method ( 200 ) according to claim 1 , wherein the internal combustion engine ( 110 ) is not fired during the purging operating phase ( 205 ).
3. The method ( 200 ) according to claim 1 , wherein the purging fluid does not comprise fuel.
4. The method ( 200 ) according to claim 1 , wherein the purging fluid additionally comprises fuel and is ignited in the exhaust gas burner ( 120 ).
5. The method ( 200 ) according to claim 1 , wherein the internal combustion engine ( 110 ) is fired during the purging operating phase ( 205 ) and wherein the purging fluid additionally comprises fuel and is ignited in the exhaust gas burner ( 120 ).
6. The method ( 200 ) according to claim 1 , wherein the parameter of the purge operating phase includes at least one of a frequency or a duration of the purging operating phase.
7. The method ( 200 ) according to claim 6 , wherein the operating parameter of the exhaust gas burner ( 120 ) comprises one or more from the group comprising a burner lambda adaptation value, a flame stability and an inflammation reliability.
8. The method ( 200 ) according to claim 1 , wherein a quantity and/or composition of the purging fluid is taken into account in controlling a storage level of an exhaust gas catalytic converter ( 130 ) downstream of the exhaust gas burner ( 120 ).
9. The method ( 200 ) according to claim 1 , wherein the at least one component ( 130 , 150 ) of the exhaust section ( 102 ) has a temperature during the purging operating phase ( 205 ) that is not be-low a minimum operating temperature or light-off temperature of the at least one component ( 130 , 150 ).
10. A processor unit ( 140 ) which is configured to control and an exhaust gas burner ( 120 ) in an exhaust section ( 102 ) of an internal combustion engine ( 110 ), to:
introduce a purging fluid comprising at least air ( 20 ) into the exhaust gas burner ( 120 ) during a purging operating phase ( 205 ), which lies outside a time of a normal operating phase ( 201 ) of the exhaust gas burner ( 120 ), and
discharge a discharge mixture ( 22 ) formed using the purging fluid from the exhaust gas burner ( 120 ),
wherein the exhaust gas burner ( 120 ) is operated for a purpose of heating at least one component ( 130 , 150 ) of the exhaust section ( 102 ) to its operating temperature during the normal operating phase ( 201 ),
wherein the exhaust gas burner ( 120 ) is configured to be in fluid communication with the exhaust section ( 102 ) of the internal combustion engine ( 110 ), and
wherein a parameter of the purging operating phase is determined ( 203 ) as a function of an operating parameter of the exhaust gas burner ( 120 ) determined during the normal operating phase ( 201 ).
11. A non-transitory, computer-readable storage medium containing instructions that when executed by a computer cause the computer to control and an exhaust gas burner ( 120 ) in an exhaust section ( 102 ) of an internal combustion engine ( 110 ), to:
introduce a purging fluid comprising at least air ( 20 ) into the exhaust gas burner ( 120 ) during a purging operating phase ( 205 ), which lies outside a time of a normal operating phase ( 201 ) of the exhaust gas burner ( 120 ), and
discharge a discharge mixture ( 22 ) formed using the purging fluid from the exhaust gas burner ( 120 ),
wherein the exhaust gas burner ( 120 ) is operated for a purpose of heating at least one component ( 130 , 150 ) of the exhaust section ( 102 ) to its operating temperature during the normal operating phase ( 201 ),
wherein the exhaust gas burner ( 120 ) is configured to be in fluid communication with the exhaust section ( 102 ) of the internal combustion engine ( 110 ), and
wherein a parameter of the purging operating phase is determined ( 203 ) as a function of an operating parameter of the exhaust gas burner ( 120 ) determined during the normal operating phase ( 201 ).