Impacts and Mitigation of Varying Fuel Composition in a Natural Gas Heavy-Duty Engine

被引：12
作者：
McTaggart-Cowan G. [1 ]
Huang J. [1 ]
Munshi S. [1 ]
机构：
[1] McTaggart-Cowan, Gordon
[2] Huang, Jian
[3] Munshi, Sandeep
来源：
| 1600年 / SAE International卷 / 10期
关键词：
D O I：
10.4271/2017-01-0777
中图分类号：
学科分类号：
摘要：
Natural gas offers the potential to reduce greenhouse gas emissions from heavy-duty on-road transportation. One of the challenges facing natural gas as a fuel is that its composition can vary significantly between different fuel suppliers and geographical regions. In this work, the impact of fuel composition variations on a heavy-duty, direct injection of natural gas engine with diesel pilot ignition is evaluated. This combustion process results in a predominantly non-premixed gaseous fuel combustion event; as a result, end-gas autoignition (knock) is not a concern. Changes in the fuel composition do still impact the combustion, both through the changes in the chemical kinetics of the reactions and due to changes in the density of the fuel. Increasing concentrations of heavier hydrocarbons, such as ethane or propane, in the fuel lead to higher fuel densities and hence greater fuel mass being injected for a given injection duration. This results in a combustion that has similar peak heat-release rates but longer combustion duration. There is little impact on peak cylinder pressures or the timing of the start of the combustion. The main effect on engine emissions is a substantial increase in PM emissions, due to the greater concentrations of C2-and higher species in the fuel. Various on-board sensors can be used to monitor the engine and correct fueling to avoid engine damage. In this work, a sensing system including bearing-cap mounted accelerometers is used to detect changes in the combustion event and adjust the fueling as needed to maintain engine torque over significant fuel composition variations. These results demonstrate a potential technique for engine protection and control that can accommodate wide variations in natural gas composition. © 2017 SAE International.
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页码：1506 / 1517
页数：11
相关论文
共 25 条
  • [1] Ouellette P., Goudie D., Mctaggart-Cowan G.P., Progress in the development of natural gas high pressure direct injection for Euro VI heavy-duty trucks, (2016)
  • [2] Dunn M.E., Mctaggart-Cowan G.P., Saunders J., High Efficiency and Low Emission Natural Gas Engines for Heavy Duty Vehicles
  • [3] Mctaggart-Cowan G.P., Rogak S.N., Hill P.G., Bushe W.K., Munshi S.R., Effects of operating condition on particulate matter and nitrogen oxides emissions from a heavy-duty direct injection natural gas engine using cooled exhaust gas recirculation, International Journal of Engine Research, 5, 6, pp. 499-511, (2004)
  • [4] Mctaggart-Cowan G.P., Jones H.L., Rogak S.N., Bushe W.K., Hill P.G., Munshi S.R., The Effects of High-Pressure Injection on a Compression-Ignition, Direct Injection of Natural Gas Engine, ASME J. Eng. Gas Turbines Power, 129, 2, pp. 579-588, (2006)
  • [5] Jones H., Mctaggart-Cowan G., Rogak S., Bushe W., Et al., Source Apportionment of Particulate Matter from a Diesel Pilot-Ignited Natural Gas Fuelled Heavy Duty DI Engine, SAE Technical Paper 2005-01-2149, (2005)
  • [6] Bassi A., Liquefied Natural Gas (LNG) as Fuel for Road Heavy Duty Vehicles Technologies and Standardization, SAE Technical Paper 2011-24-0122, (2011)
  • [7] Khalil E.B., Karim G.A., A kinetic investigation of the role of changes in the composition of natural gas in engine applications, ASME Journal of Engineering for Gas Turbines and Power, 124, pp. 404-411, (2002)
  • [8] Kubesh J., King S., Liss W., Effect of Gas Composition on Octane Number of Natural Gas Fuels, SAE Technical Paper 922359, (1992)
  • [9] Mctaggart-Cowan G.P., Pollutant formation in a gaseous-fueled, direct injection engine, PhD thesis, (2006)
  • [10] Mctaggart-Cowan G.P., Rogak S.N., Munshi S.R., Hill P.G., Bushe W.K., The influence of fuel composition on a heavy-duty, natural gas direct-injection engine, Fuel, 89, (2010)
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