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Development of Highly Efficient Lean NOx Catalyst System in Low Exhaust Gas Temperature Honda R&D Company, Limited
- Format:
- Conference/Event
- Author/Creator:
- Matsuo, Matsuo, author.
- Conference Name:
- SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2013
- Summary:
- The reduction of NOx in exhaust gas has been a major challengein diesel engine development. For the NOx reduction issues, a newLean NOx Catalyst (LNC) aftertreatment system has been developed byHonda. A feature of the LNC system is the method that is used toreduce NOx through an NH₃-Selective Catalytic Reduction (NH₃-SCR).In an LNC system NOx is adsorbed at lean conditions, then convertedto NH₃ at rich conditions and subsequently reduced in the next leanphase.In recent years, as the efficiency of the diesel engine hasimproved, the exhaust gas temperatures have been reduced gradually.Therefore, the aftertreatment system needs to be able to purify NOxat lower temperatures. The development of a new LNC which has ahigh activity at low temperature has been carried out. For theimprovement of the LNC three material improvements were developed.The first of these was the development of a NOx adsorbent which ismatching the targeted exhaust gas temperatures. The secondimprovement was the development of a layer configuration to reducethe negative cross-effects of NOx adsorbent and zeolite at lowtemperature. The final improvement, the most important andchallenging issue, was the improvement of catalyst durability.Furthermore, the improvement of A/F control considering NOxadsorption performance and NH₃-SCR performance was carried out.As a result, a new LNC system which has high performance even inlow exhaust gas temperature was established by new technologiesapplied to the LNC and improved A/F control
- Notes:
- Vendor supplied data
- Publisher Number:
- 2013-01-0536
- Access Restriction:
- Restricted for use by site license
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