초록 ▼

A system and device for providing secondary combustion for regeneration of catalyst in a catalytic converter (24) and/or for regeneration of a particulate trap (21) is provided. The secondary combustion takes place in the exducer chamber (13) of a turbine of a turbocharger (2), and generates heat fo

A system and device for providing secondary combustion for regeneration of catalyst in a catalytic converter (24) and/or for regeneration of a particulate trap (21) is provided. The secondary combustion takes place in the exducer chamber (13) of a turbine of a turbocharger (2), and generates heat for bringing a catalyst up to peak oxidation or reduction temperature, for regeneration of a catalyst, and incineration of particulates in a trap. The system takes advantage of heat and turbulence in the exducer chamber for promoting fuel/air mixture and for simplifying the amount of parts needed to incorporate a secondary combustion means into a turbocharger equipped primary combustion system (1).

대표청구항 ▼

1. A turbocharger comprising a turbine housing (2) for housing a turbine wheel, said turbine housing including an exducer chamber (13) into which exhaust gases are discharged from the turbine wheel, said turbocharger further comprising a fuel injector (10) for injecting fuel directly into said exduc

1. A turbocharger comprising a turbine housing (2) for housing a turbine wheel, said turbine housing including an exducer chamber (13) into which exhaust gases are discharged from the turbine wheel, said turbocharger further comprising a fuel injector (10) for injecting fuel directly into said exducer chamber.2. A turbocharger as in claim 1, further comprising an igniter (12) for igniting fuel injected into said exducer chamber (13) by said fuel injector (10).3. A secondary combustion system for regeneration of catalyst in the exhaust of a primary combustion engine, comprising:a turbocharger including an exhaust turbine (5) located in the exhaust stream of said internal combustion system (1) and including an exducer chamber (13); a catalytic converter (24) located in the exhaust stream of said internal combustion system, downstream of said turbocharger; a secondary combustion means located in said turbine exducer chamber (13), an electronic control module (25) for receiving sensed conditions of said catalytic converter and for transmitting signals to said secondary combustion means. 4. A secondary combustion system as in claim 3, wherein said secondary combustion means comprises a fuel injector (10) for injecting fuel directly into said exducer chamber and an igniter (12) for igniting fuel injected into said exducer chamber (13) by said fuel injector.5. A secondary combustion system as in claim 3, wherein said electronic control module is programmed to initiate combustion in said secondary combustion means upon detection of a temperature below a predetermined threshold.6. A secondary combustion system as in claim 3, wherein said electronic control module initiates combustion in said secondary combustion means upon detection of a NOx level downstream of said catalytic converter (24) above a predetermined threshold.7. A secondary combustion system for regeneration of a particulate trap (21) in the exhaust (4, 20) of an primary combustion engine (1), comprising:a turbocharger (2) including an exhaust turbine (5) located in the exhaust stream of said internal combustion system and including an exducer chamber (13); a particulate trap (21) located in the exhaust stream of said internal combustion system, downstream of said turbocharger (2); a secondary combustion means located in said turbine exducer chamber (13), an electronic control module (25) for receiving sensed conditions of said particulate trap (21) and for transmitting signals to said secondary combustion means. 8. A secondary combustion system as in claim 7, wherein said secondary combustion means comprises a fuel injector (10) for injecting fuel directly into said exducer chamber (13) and an igniter (12) for igniting fuel injected into said exducer chamber (13) by said fuel injector (10).9. A secondary combustion system as in claim 7, wherein said electronic control module initiates combustion in said secondary combustion means upon detection of a pressure differential, measure upstream and downstream of said particulate trap, above a predetermined threshold.