초록 ▼

An apparatus comprises an exhaust system and an injection system. The injection system is configured to vaporize a first liquid portion of an agent into at least one bubble so as to inject a second liquid portion of the agent into the exhaust system by use of the at least one bubble for delivery of

An apparatus comprises an exhaust system and an injection system. The injection system is configured to vaporize a first liquid portion of an agent into at least one bubble so as to inject a second liquid portion of the agent into the exhaust system by use of the at least one bubble for delivery of the agent to an emission abatement device of the exhaust system. An associated method is disclosed.

대표청구항 ▼

The invention claimed is: 1. A method, comprising the steps of: vaporizing a first liquid portion of an agent into at least one bubble, injecting a second liquid portion of the agent into an exhaust gas stream by use of the at least one bubble, and advancing the bubble-injected agent to an emission

The invention claimed is: 1. A method, comprising the steps of: vaporizing a first liquid portion of an agent into at least one bubble, injecting a second liquid portion of the agent into an exhaust gas stream by use of the at least one bubble, and advancing the bubble-injected agent to an emission abatement device. 2. The method of claim 1, wherein the vaporizing step comprises forming the at least one bubble with a heater. 3. The method of claim 1, wherein: the vaporizing step comprises vaporizing the first liquid portion of the agent into a plurality of bubbles, and the injecting step comprises injecting the second liquid portion of the agent into the exhaust gas stream by use of the plurality of bubbles. 4. The method of claim 3, wherein the injecting step comprises atomizing the second liquid portion of the agent by use of the plurality of bubbles. 5. The method of claim 1, wherein the injecting step comprises injecting the second liquid portion of the agent into the exhaust gas stream without introducing air into the agent. 6. The method of claim 1, wherein: the vaporizing step comprises vaporizing a first liquid portion of a hydrocarbon fuel into a hydrocarbon fuel bubble, the injecting step comprises injecting a second liquid portion of the hydrocarbon fuel into the exhaust gas stream by use of the hydrocarbon fuel bubble, and the advancing step comprises advancing the bubble-injected hydrocarbon fuel to a NOx trap. 7. The method of claim 1, wherein: the vaporizing step comprises vaporizing a first liquid portion of a hydrocarbon fuel into a hydrocarbon fuel bubble, the injecting step comprises injecting a second liquid portion of the hydrocarbon fuel into the exhaust gas stream by use of the hydrocarbon fuel bubble, and the advancing step comprises advancing the bubble-injected hydrocarbon fuel to a particulate abatement system. 8. The method of claim 1, wherein: the vaporizing step comprises vaporizing a first liquid portion of urea into a urea bubble, the injecting step comprises injecting a second liquid portion of the urea into the exhaust stream by use of the urea bubble, and the advancing step comprises advancing the bubble-injected urea to a selective catalytic reduction device. 9. An apparatus, comprising: an exhaust system comprising an emission abatement device, and an injection system configured to vaporize a first liquid portion of an agent into at least one bubble so as to inject a second liquid portion of the agent into the exhaust system by use of the at least one bubble for delivery of the agent to the emission abatement device. 10. The apparatus of claim 9, wherein the injection system comprises a heater configured to vaporize the first liquid portion into the at least one bubble. 11. The apparatus of claim 10, wherein the heater comprises a single heating element configured to form the at least one bubble thereon. 12. The apparatus of claim 10, wherein: the heater comprises a plurality of heating elements, and each heating element is configured to form at least one bubble thereon. 13. The apparatus of claim 10, wherein the injection system comprises a controller electrically coupled to the heater to control operation of the heater. 14. The apparatus of claim 13, wherein the controller is configured to control operation of the heater according to a time-based scheme. 15. The apparatus of claim 13, wherein: the injection system includes a sensor coupled to the controller and the exhaust system, and the controller is configured to operate the heater in response to operation of the sensor. 16. The apparatus of claim 10, wherein: the injection system comprises a nozzle for injecting the agent, and the heater comprises a heating element positioned within the nozzle. 17. The apparatus of claim 10, wherein: the injection system comprises a nozzle for injecting the agent, and the heater comprises a heating element positioned outside of the nozzle. 18. The apparatus of claim 9, wherein the emission abatement device comprises a NOx trap fluidly coupled to the injection system to receive the bubble-injected agent. 19. The apparatus of claim 9, wherein the emission abatement device comprises a particulate abatement device fluidly coupled to the injection system to receive the bubble-injected agent. 20. The apparatus of claim 9, wherein the emission abatement device comprises a selective catalytic reduction device fluidly coupled to the injection system to receive the bubble-injected agent.