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TIER II Emission Reduction Strategies for US HSDI Diesels
Technical Paper
2005-08-0111
Sector:
Event:
JSAE Spring Conference
Language:
Japanese
Abstract
The HSDI diesel engine now commands about 50% market penetration for newly sold passenger vehicles in Europe. However, the use of the engines in the US is currently extremely limited. One of the major obstacles to the introduction of these highly efficient engines has been the concern over meeting future TIER 2 emissions levels. As the market introduction of particulate filter is a given, this paper focuses on NOx reduction technologies which are under development today. Improvements on charge systems, EGR systems and fuel injection systems are described and test results are presented which address both the light load conditions during FTP cycle as well as the higher load phases during US 06 cycle. These approaches enable significant NOx reductions. In addition to the internal engine measures NOx aftertreatment systems are discussed in this paper.