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Title: Series hybrid vehicles and optimized hydrogen engine design

Abstract

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 themore » 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.« less

Authors:
;  [1];  [2]
  1. Lawrence Livermore National Lab., CA (United States)
  2. Sandia National Labs., Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
104996
Report Number(s):
UCRL-JC-120325; CONF-950857-4
ON: DE95017816; TRN: 95:006968
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Society of Automotive Engineers future transportation technology conference and exposition, Costa Mesa, CA (United States), 7-10 Aug 1995; Other Information: PBD: 10 May 1995
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Smith, J.R., Aceves, S., and Van Blarigan, P. Series hybrid vehicles and optimized hydrogen engine design. United States: N. p., 1995. Web. doi:10.2172/95252.
Smith, J.R., Aceves, S., & Van Blarigan, P. Series hybrid vehicles and optimized hydrogen engine design. United States. doi:10.2172/95252.
Smith, J.R., Aceves, S., and Van Blarigan, P. Wed . "Series hybrid vehicles and optimized hydrogen engine design". United States. doi:10.2172/95252. https://www.osti.gov/servlets/purl/104996.
@article{osti_104996,
title = {Series hybrid vehicles and optimized hydrogen engine design},
author = {Smith, J.R. and Aceves, S. and Van Blarigan, P.},
abstractNote = {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.},
doi = {10.2172/95252},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {5}
}

Conference:
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