New diesel oil mist separator developed: Alfdex separator a joint effort from Haldex, Alfa-Laval targeting vehicular, stationary and marine uses

摘要

Closing diesel engine crankcases is a technology path receiving increased attention as global emissions standards become more stringent. At this point, while there is not a global regulation for closing diesel engine crankcases, there is action in the U.S. and as emissions restrictions tighten around the world, ventilating diesel crankcases to the ambient air is certain to be addressed in future legislation. In the U.S., the 2007 truck and bus heavy-duty diesel regulations eliminate the crankcase emission control exception for turbocharged heavy-duty diesel engines. Crankcase emissions from these engines will be treated the same as other exhaust emissions. For the off-highway markets, the proposed Tier 4 standards may require closed crankcase ventilation, with the possibility that turbocharged engine crankcase emissions may be discharged into the ambient atmosphere. In such cases, crankcase emissions must be measured during emissions testing and added to tailpipe emissions. This proposed standard would be phased in between 2008 and 2014.