초록 ▼

An automobile engine's catalytic converter is heated by inducing a change in the engine's fuel injection delivery that varies from normal operating conditions. Heating the engine's catalytic converter by changing the engine's fuel injection delivery is useful in enabling the catalytic converter to a

An automobile engine's catalytic converter is heated by inducing a change in the engine's fuel injection delivery that varies from normal operating conditions. Heating the engine's catalytic converter by changing the engine's fuel injection delivery is useful in enabling the catalytic converter to achieve efficient operating temperature quicker and enables efficient and accurate diagnosis of catalyst degradation. Diagnosis of degraded catalyst performance is accomplished by measurements of the catalyst's temperature characteristics following alternating of the fuel delivery to different cylinders from lean and rich fuel conditions that differ from the mass ratio of air to fuel being at chemical stoichiometric conditions. Measurements of the catalyst's temperature characteristics with defined modifications of an engine's operating conditions allows determining the catalytic converter's gas conversion effectiveness. Commonly available temperature sensing devices are used to measure the exothermic heat generation in a portion of the evaluated catalytic converter for comparison to the temperature characteristics of a known catalyst's conversion effectiveness.

대표청구항 ▼

An automobile engine's catalytic converter is heated by inducing a change in the engine's fuel injection delivery that varies from normal operating conditions. Heating the engine's catalytic converter by changing the engine's fuel injection delivery is useful in enabling the catalytic converter to a

An automobile engine's catalytic converter is heated by inducing a change in the engine's fuel injection delivery that varies from normal operating conditions. Heating the engine's catalytic converter by changing the engine's fuel injection delivery is useful in enabling the catalytic converter to achieve efficient operating temperature quicker and enables efficient and accurate diagnosis of catalyst degradation. Diagnosis of degraded catalyst performance is accomplished by measurements of the catalyst's temperature characteristics following alternating of the fuel delivery to different cylinders from lean and rich fuel conditions that differ from the mass ratio of air to fuel being at chemical stoichiometric conditions. Measurements of the catalyst's temperature characteristics with defined modifications of an engine's operating conditions allows determining the catalytic converter's gas conversion effectiveness. Commonly available temperature sensing devices are used to measure the exothermic heat generation in a portion of the evaluated catalytic converter for comparison to the temperature characteristics of a known catalyst's conversion effectiveness. , 19270700, Hedley et al., 200/061.43; US-2135131, 19381100, Bassett, 200/061.43; US-2476111, 19490700, Opalek, 049/027; US-3168165, 19650200, Bagnasco, 187/317; US-3537211, 19701100, Guilbert, Jr. et al., 049/027; US-4301621, 19811100, Houweling, 049/027; US-4953608, 19900900, Larsson, 160/001; US-4984658, 19910100, Peelle et al., 187/314; US-5233185, 19930800, Whitaker, 250/222.1; US-5426293, 19950600, Miller et al.; US-5596840, 19970100, Teich, 049/026; US-5602370, 19970200, Kau, 200/061.43; US-5625980, 19970500, Teich et al., 049/026; US-5728984, 19980300, Miller; US-5743320, 19980400, McKeon, 160/310; US-5832665, 19981100, Miller et al.; US-5929406, 19990700, Thile, 200/061.43; US-5962825, 19991000, Miller; US-6082046, 20000700, Simmons, 049/026; US-6176039, 20010100, Craig, 049/026 Efficiency", P. Schofield. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 23, "Recent Advances in Steam Turbines for Industrial and Cogeneration Applications", Leger et al. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 24, "Mechanical Drive Steam Turbines", D. R. Leger. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 25, "Steam Turbines for STAG� Combined-Cycle Power Systems", M. Boss. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 26, "Cogeneration Application Considerations", Fisk et al. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 27, "Performance and Economic Considerations of Repowering Steam Power Plants", Stoll et al. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 28, "High-Power-Density� Steam Turbine Design Evolution", J. H. Moore. "39th GE Turbine State-of-the-Art Technology Seminar", Tab 29, "Advan