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原文传递 Series hybrid vehicles and optimized hydrogen engine design

题名：	Series hybrid vehicles and optimized hydrogen engine design
作者：	Van Blarigan, P.;Aceves, S.;Smith, J.R.;
关键词：	33 ADVANCED PROPULSION SYSTEMS ;32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION ;42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES ; VEHICLES; DESIGN; HYDROGEN FUELS; COMBUSTION; COMPUTERIZED SIMULATION; INTERNAL COMBUSTION ENGINES; AUTOMOTIVE FUELS; AIR POLLUTION CONTROL
摘要：	Lawrence Livermore, Sandia Livermore and Los Alamos National Laboratories have a joint project to develop an optimized hydrogen fueled engine for series hybrid automobiles. The major divisions of responsibility are: system analysis, engine design and kinetics modeling by LLNL; performance and emission testing, and friction reduction by SNL; computational fluid mechanics and combustion modeling by LANL. This project is a component of the Department of Energy, Office of Utility Technology, National Hydrogen Program. We report here on the progress on system analysis and preliminary engine testing. We have done system studies of series hybrid automobiles that approach the PNGV design goal of 34 km/liter (80 mpg), for 384 km (240 mi) and 608 km (380 mi) ranges. Our results indicate that such a vehicle appears feasible using an optimized hydrogen engine. The impact of various on-board storage options on fuel economy are evaluated. Experiments with an available engine at the Sandia Combustion Research Facility demonstrated NO{sub x} emissions of 10 to 20 ppm at an equivalence ratio of 0.4, rising to about 500 ppm at 0.5 equivalence ratio using neat hydrogen. Hybrid vehicle simulation studies indicate that exhaust NO{sub x} concentrations must be less than 180 ppm to meet the 0.2 g/mile California Air Resources Board ULEV or Federal Tier II emissions regulations. We have designed and fabricated a first generation optimized hydrogen engine head for use on an existing single cylinder Onan engine. This head currently features 14.8:1 compression ratio, dual ignition, water cooling, two valves and open quiescent combustion chamber to minimize heat transfer losses.
总页数：	21p
报告类型：	科技报告