A Comparative Study on the Fuel Economy Improvement of a Natural Gas SI Engine at the Lean Burn and the Stoichiometric Operation both with EGR under the Premise of Meeting EU6 Emission Legislation

2015 ◽  
Author(s):  
Bowen Yan ◽  
Mingfa Yao ◽  
Bin Mao ◽  
Yongzhi Li ◽  
Yufeng Qin
Keyword(s):  
Natural Gas ◽  
Comparative Study ◽  
Fuel Economy ◽  
Si Engine ◽  
Lean Burn ◽  
Fuel Economy Improvement ◽  
Emission Legislation

Comparative study on EGR and lean burn strategies employed in an SI engine fueled by low calorific gas

2014 ◽  
Vol 129 ◽  
pp. 10-16 ◽  
Author(s):  
Sunyoup Lee ◽  
Seunghyun Park ◽  
Changgi Kim ◽  
Young-Min Kim ◽  
Yongrae Kim ◽  
...  
Keyword(s):  
Comparative Study ◽  
Si Engine ◽  
Lean Burn

Numerical investigation the effects of the twin-spark plugs coupled with EGR on the combustion process and emissions characteristics in a lean burn natural gas SI engine

Energy ◽  
2020 ◽  
Vol 206 ◽  
pp. 118181 ◽  
Author(s):  
Xiongbo Duan ◽  
Shiheng Zhang ◽  
Yiqun Liu ◽  
Yangtang Li ◽  
Jingping Liu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Investigation ◽  
Combustion Process ◽  
Si Engine ◽  
Lean Burn

scholarly journals Regulated and Non-Regulated Emissions and Fuel Economy from Conventional Diesel, Hybrid-Electric Diesel, and Natural Gas Transit Buses

2012 ◽  
Vol 47 (3) ◽  
Author(s):  
W. Scott Wayne ◽  
ABM S. Kahn ◽  
Mridul Gautam ◽  
Gregory J. Thompson ◽  
Donald W. Lyons
Keyword(s):  
Natural Gas ◽  
Fuel Economy ◽  
Test Site ◽  
Oxides Of Nitrogen ◽  
Test Cycle ◽  
Lean Burn ◽  
Transit Buses ◽  
Specific Emissions ◽  
Hybrid Electric ◽  
Positive Effect

Distance-specific fuel economy (FE) and emissions of carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx), and particulate matter (PM) from transit buses representing diesel, retrofitted diesel, hybrid-electric diesel, and lean-burn natural gas technologies are presented in this paper. Emissions were collected from these buses at the Washington Metropolitan Area Transport Authority (WMATA) test site in Landover, Maryland. In this program, one bus each from diesel, retrofitted diesel, hybrid-electric diesel, and natural gas technologies was tested on 17 chassis cycles and the other buses were tested on a subset of these cycles. Data show that the test cycle has a profound effect on distance-specific emissions and FE, and relative emissions performance of technology is also cycle dependant. Lean-burn natural gas buses demonstrated their low PM output, diesel engines showed low HC output, benefit of exhaust filtration was evident, and the positive effect of hybrid-electric drive technology was most pronounced for low-speed transient cycles.

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