초록

A method of using a burner-based system to produce diesel exhaust gas that contains particulate matter of a desired composition, to simulate the PM matter in exhaust produced by a production-type diesel internal combustion engine.

대표청구항 ▼

What is claimed is: 1. A method of using a burner-based system to generate exhaust gas containing particulate matter (PM) that simulates PM produced by a diesel powered internal combustion engine, comprising: using a burner to receive air and fuel and to combust the air and fuel to produce the exha

What is claimed is: 1. A method of using a burner-based system to generate exhaust gas containing particulate matter (PM) that simulates PM produced by a diesel powered internal combustion engine, comprising: using a burner to receive air and fuel and to combust the air and fuel to produce the exhaust gas and nascent PM in the exhaust gas; using a heat exchanger to cool the exhaust gas downstream of the burner to a temperature not greater than 650 degrees Centigrade; using an oxygen injector to inject a pre-determined amount of oxygen into the exhaust, thereby providing the exhaust gas with an oxygen content of 2-10 percent by volume; using a quencher downstream the oxygen injector, to cool the exhaust to a temperature sufficiently low to lock the composition of the PM; and using a computerized control system to control the amount and timing of fuel and oxygen supplied to the burner and oxygen injector. 2. The method of claim 1, wherein the burner is operated rich of stoichiometry. 3. The method of claim 1, further comprising the step of doping the fuel with sulfur compounds. 4. The method of claim 1, further comprising the step of doping the fuel with lubricating oil or at least one lubricating oil additive. 5. The method of claim 1, further comprising the step using an oil injector, located between the heat exchanger and the quencher, to inject a pre-determined amount of engine lubricant or additive into the exhaust gas, thereby providing a pre-determined amount of soluble organic fraction into the exhaust gas. 6. The method of claim 1, further comprising the step using an oil injector, located between the heat exchanger and the quencher, to inject a pre-determined amount of additive into the exhaust gas, thereby providing ash in the exhaust gas. 7. The method of claim 1, wherein the step of using a heat exchanger is performed by controlling the residence time of the exhaust gas in the heat exchanger. 8. A method of using a burner-based system to test an emissions control device that treats exhaust gas containing particulate matter (PM), comprising: using a burner to receive air and fuel and to combust the air and fuel to produce the exhaust gas and nascent PM in the exhaust gas; using a heat exchanger to cool the exhaust gas downstream of the burner to a temperature not greater than 650 degrees Centigrade; using an oxygen injector to inject a pre-determined amount of oxygen into the exhaust, thereby providing the exhaust gas with an oxygen content of 2-10 percent by volume; using a quencher downstream the oil injector and the oxygen injector, to cool the exhaust to a temperature sufficiently low to lock the PM composition; delivering the exhaust gas to the emissions control device; and using a computerized control system to control the amount and timing of fuel and oxygen supplied to the burner and oxygen injector. 9. The method of claim 8, wherein the burner is operated rich of stoichiometry. 10. The method of claim 8, further comprising the step of doping the fuel with sulfur compounds. 11. The method of claim 8, further comprising the step of doping the fuel with lubricating oil or at least one lubricating oil additive. 12. The method of claim 8, further comprising the step using an oil injector, located between the heat exchanger and the quencher, to inject a pre-determined amount of engine lubricant or additive into the exhaust gas, thereby providing a pre-determined amount of soluble organic fraction into the exhaust gas. 13. The method of claim 8, wherein the step of using a heat exchanger is performed by controlling the residence time of the exhaust gas in the heat exchanger. 14. The method of claim 8, wherein the emissions control device is a diesel particulate filter. 15. The method of claim 8, wherein the emissions control device is a diesel particulate filter, and wherein the control system is programmed to operate the system in regeneration mode.