| Patent application number | Description | Published |
|---|
| 20090272099 | APPARATUS, SYSTEM, AND METHOD FOR DETERMINING THE DEGRADATION OF AN SCR CATALYST - According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst. | 11-05-2009 |
| 20090272101 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING AMMONIA SLIP FROM AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
| 20090272104 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST USING AMMONIA STORAGE AND SLIP CONTROL - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
| 20090272105 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
| 20100024390 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - According to one representative embodiment, an apparatus for reducing NO | 02-04-2010 |
| 20100024397 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS FROM AN ENGINE SYSTEM - Various embodiments of an apparatus, system, and method are disclosed for controlling NO | 02-04-2010 |
| 20100242440 | APPARATUS, SYSTEM, AND METHOD FOR ESTIMATING AN NOx CONVERSION EFFICIENCY OF A SELECTIVE CATALYTIC REDUCTION CATALYST - According to one exemplary embodiment, an apparatus is disclosed for estimating an NO | 09-30-2010 |
| 20110047964 | METHODS, SYSTEMS, AND APPARATUSES OF SCR DIAGNOSTICS - One embodiment is a method including operating an SCR system at a plurality of commanded ammonia to NOx input ratios, providing a plurality of data indicating NOx output from the SCR system for the plurality of commanded ammonia to NOx input ratios, and evaluating the plurality of data to diagnose the SCR system. Additional embodiment are methods, systems, and apparatuses including SCR diagnostics. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings. | 03-03-2011 |
