The present application relates in general to methods for testing the performance of an automotive catalytic converter under conditions simulating those which occur in motor vehicles over extended driving conditions.
대표청구항▼
We claim: 1. A method for simulating aging of an emissions control device in the exhaust line of an internal combustion engine, comprising: providing a burner system having at least a burner for receiving air and fuel having an air-fuel ratio and for combusting a fuel feedstream to produce simulate
We claim: 1. A method for simulating aging of an emissions control device in the exhaust line of an internal combustion engine, comprising: providing a burner system having at least a burner for receiving air and fuel having an air-fuel ratio and for combusting a fuel feedstream to produce simulated engine exhaust; an exhaust line for carrying the exhaust from the burner to the emissions control device; a heat exchanger for cooling the exhaust gas downstream the burner; and a fan for directly cooling the emissions control device; placing the emissions control device on the exhaust line downstream the heat exchanger; simulating a number of engine cycles, using a computerized control system, each cycle having a succession of engine operating modes, wherein at least one of the modes is a thermal excursion mode accomplished by providing the burner with a rich air-fuel ratio and providing supplemental oxygen into the exhaust line immediately upstream the emissions control device; providing a user interface for the control system; and storing, in a computer readable medium, values representing exhaust gas temperature during the thermal excursion mode. 2. The method of claim 1, wherein the system is operable to maintain stable operation at an air to fuel ratio of from about 8:1 to 25:1. 3. The method of claim 1, wherein the supplemental oxygen is provided in the form of supplemental air. 4. The method of claim 1, wherein the thermal excursion mode provides a predetermined carbon monoxide component of the exhaust of at least 3%. 5. The method of claim 1, wherein the thermal excursion mode provides a predetermined oxygen component of the exhaust of at least 3%. 6. The method of claim 1, wherein one of the modes is a cooling mode, performed by cooling the emissions control device with the fan. 7. The method of claim 1, wherein one of the modes is a cooling mode, performed by cooling the exhaust with a heat exchanger on the exhaust line between the burner and the emissions control device. 8. The method of claim 1, wherein one of the modes is a cooling mode, performed by cooling the exhaust with a heat exchanger on the exhaust line between the burner and the emissions control device and with the fan. 9. The method of claim 1, wherein the burner system further has an injector for injecting substances into the exhaust line downstream the burner and upstream the emissions control device. 10. The method of claim 9, wherein the injector injects phosphorus. 11. The method of claim 9, wherein the injector provides an atomized spray into the exhaust line. 12. The method of claim 1, wherein the operating modes further include at least the following modes: steady state stoichiometric and rich. 13. The method of claim 1, wherein the operating modes further include at least the following modes: steady state stoichiometric and lean. 14. The method of claim 1, wherein the operating modes further include at least the following modes: steady state stoichiometric and cold start. 15. The method of claim 1, wherein the air-fuel ratio is maintained by using the user interface to specify a fuel flow amount. 16. The method of claim 1, wherein the air-fuel ratio is maintained by using the user interface to specify an air-fuel ratio. 17. The method of claim 1, wherein the user interface receives user input to specify exhaust temperature, exhaust flow, and an exhaust air-fuel ratio. 18. The method of claim 1, wherein the thermal excursion substantially conforms to a RAT-A specification. 19. The method of claim 1, wherein the thermal excursion is performed by providing exhaust having a temperature up to 1000 degrees C. 20. A method for aging, and evaluating the effects of the aging, on an emissions control device in the exhaust line of an internal combustion engine, comprising: providing a burner for receiving air and fuel having a known air-fuel ratio and for combusting a fuel feedstream to produce simulated engine exhaust; providing an exhaust line for carrying the exhaust from the burner to the emissions control device; providing a heat exchanger for cooling the exhaust gas downstream the burner; providing an injector for injecting substances into the exhaust line downstream the burner and upstream the emissions control device, placing an emissions control device on the exhaust line downstream the injector; providing a fan for directly cooling the emissions control device; using a computerized control system to simulate a number of engine cycles, each cycle having a succession of engine operating modes, wherein at least one of the modes is a thermal excursion mode accomplished by providing the burner with a rich air-fuel ratio and providing supplemental air into the exhaust line immediately upstream the emissions control device; providing a user interface for the control system; storing, in a computer readable medium, values representing exhaust gas temperature during the thermal excursion mode; and evaluating the operation of the emissions control device after the engine cycles are simulated. 21. The method of claim 20, wherein the injector injects phosphorus into the exhaust, and wherein the evaluating step is performed by evaluating the efficiency of the emissions control device as a function of the amount of injected phosphorus. 22. The method of claim 20, wherein the emissions control device is a catalyst and the evaluating step is performed by using an engine-based system to measure the efficiency of the catalyst. 23. The method of claim 20, wherein the emissions control device is a catalyst and the evaluating step is performed by coring the catalyst. 24. The method of claim 20, wherein method is used to perform a first test that simulates a number of engine cycles without use of the injector to age a first emissions control device, then to perform a second test that simulates a number of engine cycles using the injector to inject a known contaminant to age a second emissions control device, and wherein the evaluation step is performed twice to compare the operation of the first emissions control device to the operation of the second emissions control device.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (44)
Stark, Terrance L., Burner for heating gas stream.
Jerger Robert Joseph ; Davey Christopher Kirk ; Kluzner Michael I. ; Nader David R., Catalyst monitor using arc length ratio of pre- and post-catalyst sensor signals.
Kreutmair Josef (Ehrenberg DEX) Knig Nikolaus (Gnzlhofen DEX) Zbl Alfred (Munich DEX) Simpkin David M. (Gnding DEX), Exhaust gas system with an particulate filter and a regenerating burner.
Christopher Green CA; Jakub Hurnik CA; James Mancuso CA; Richard Schiedel CA, Fuel injector adaptor for conversion of single engines to dual fuel engines.
Schnaibel Eberhard (Hemmingen DEX) Schneider Erich (Kirchheim DEX) Blischke Frank (Stuttgart DEX), Method and apparatus for judging the functioning of a catalytic converter.
King Steven R. ; Walser Michael W. ; Cole Christopher M. ; Carpenter John W., Method and apparatus for providing multipoint gaseous fuel injection to an internal combustion engine.
Douglas A. Dobson ; Jeffrey Scott Hepburn ; Michael Igor Kluzner ; Robert Joseph Jerger ; Timothy Chanko ; William Lewis Henderson Watkins, Method and system for evaluating exhaust on-board diagnostics system.
Schnaibel Eberhard,DEX ; Schneider Erich,DEX ; Blischke Frank,DEX, Method for monitoring the operating capability of a catalyzer in the exhaust duct of an internal combustion engine.
Becker Bernard (Lothringer Weg 2N ; D-4330 Mlheim/Ruhr DEX), Multi-stage combustion chamber for combustion of nitrogen-containing gas with reduced NOx emissions, and m.
Wood ; III Charles D. (San Antonio TX) Lankford ; Jr. James (San Antonio TX) Blanchard Cheryl R. (San Antonio TX) Cole James J. (San Antonio TX) McAlwee Gerald S. (Austin TX), Spark plug having titanium diboride electrodes.
Washam Roy M. (Schenectady NY) Thibault ; Jr. Bernard A. (Clifton Park NY), Swirl gutters for isolating flow fields for combustion enhancement at non-baseload operating conditions.
De La Cruz Jose L. (San Antonio TX) Estefan ; deceased Ronald M. (late of San Antonio TX by Carlie A. Estefan ; executrix ), Test apparatus and method for determining deposit formation characteristics of fuels.
Cox, Glenn Brian; Wiley, Stephen Michael; Stockner, Alan R.; McClure, Thomas Randall; Gong, Xiaohui; Chen, Qiang; Miller, Robert Lowell, Injector having tangentially oriented purge line.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.