Southwest Research Institute discusses Californian NOx research findings

Niels Tholen - 24 November 2014

Dr. Charles Roberts, Institute Engineer at the Southwest Research Institute discussed the progress that has been made in ultra-low NOx standards research at the Integer Emission Summit 2015.

Roberts highlighted California's problem with air quality which is contributed in large parts by on- and off-highway vehicles and marine vessels. The California Air Resource Board (CARB) estimated that it requires a 75-80% further reduction in NOx over the next few years to meet clean air standards.

Roberts predicted that while the future NOx target is unknown, air quality standards targets will become increasingly stricter. However, the institute's research suggests that NOx emissions can still be improved through further engine R&D improving the trade-off in brake specific fuel consumption (BSFC) and NOx. Roberts stating that cold start NOx emissions are the new target with fast catalyst light-off being key to achieving this.

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