Market analysis shows that the centre of gravity of heavy duty engine production in the range of 4 - 30 litre swept volume has recently moved from Europe/USA to China. Based on recent trends, about 50 % of all such engines will be produced in China by 2015. The NO(x) and PM (Particulate Matter) limits imposed by Euro VI, EPA10 and Japan NLT will lead to a common on road engine technology package, based around EGR+DPF+SCR (Exhaust Gas Recirculation + Diesel Paticulate Filter + Sective Catalytic Reduction). For non road engines, a similar approach will be appropriate for Stage IV/Tier 4 final emission limits but, in the absence of PN (Particulate Number) limits, alternative lower cost solutions without the full exhaust aftertreatment may also be feasible for lower rated engines. Beyond Euro VI, the focus of development will move to fuel consumption/CO2 reduction. The very challenging target for trucks is to reduce fuel consumption by 20 % by 2020. This will require integration of many engine, transmission and vehicle technologies, plus improved logistics including telematics and location awareness. In the near term, small reductions in CO2 will be made by introduction of relatively low cost measures such as reduced viscosity oils with material coatings to avoid wear and variable flow auxiliary pumps. Optimisation of SCR efficiency towards 96 % - 97 % by thermal management will also be worked on in this period. Stop start systems at idle will become available. The technology package will vary depending on the application, cost and payback time. In the longer term, efforts will continue to recover waste energy, including turbocompounding and Organic Rankine Cycle. It will be a challenge to bring the highly complex ORC (Organic Rankine Cycle) systems into series production at a viable cost. For delivery trucks, buses and some non road applications, electric hybrid vehicles offer a major benefit in fuel consumption at greatly increased first cost. Fiscal incentives appear to be essential if electric hybrids are to be sold in anything more than low volume, unless other factors such as fuel price increases, radically cheaper batteries or fuel consumption limits intervene.
Optimisation of emission technologies for fuel consumption and cost
Optimierung von Emissionstechnologien hinsichtlich Kraftstoffverbrauch und Kosten
2010
16 Seiten, 5 Bilder, 3 Tabellen, 10 Quellen
Conference paper
Storage medium
English
Optimization of emission technologies for fuel consumption and cost
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