Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"NOx sensor"”.
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Reactive based NOx sensor
… technology has virtually eliminated carbon monoxide and particulate emissions. Sulfur oxide emissions have been eliminate by the use of ultra-low sulfur fuel. Nitrogen oxide (NOx) emissions are still not in line with up-coming EPA regulations. NOx sensors are required for all catalysts being …
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Selective catalytic reduction: testing, numeric modeling, and control strategies
… Space velocity, catalyst temperature, inlet NOx concentration, and ammonia to NOx molar feed ratio were varied. A Simulink numeric model was created to examine the SCR transient phenomena. The Simulink numeric model showed in-catalyst ammonia and NOx concentration as a function of length in …
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Model-based fault detection and diagnosis of selective catalytic reduction systems for diesel engines
… show the EPA the latest emission compliance, the sensors are required to be installed at upstream and downstream of the SCR. As a result, the reduction efficiency is also required to be monitored by the On-Board Diagnostics (OBD) regulations. Specifically, a diagnostic algorithm is required to …
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Advanced control techniques and sensors for gas engines with NSCR
… achieve simultaneous reduction of Carbon Monoxide (CO), Nitrogen Oxides (NOx), Total Hydrocarbons (THC), Volatile Organic Compounds (VOC's), and formaldehyde (CH2O). This range is difficult to maintain as transients are introduced into the system. Current fuel control technologies utilizing …