scholarly journals Evaluation of impact of combustion engine controller adaptation process on level of exhaust gas emissions in gasoline and compressed natural gas supply process

2020 ◽  
Author(s):  
Marcin Dziewiatkowski ◽  
Dariusz Szpica ◽  
Andrzej Borawski
Keyword(s):  
Natural Gas ◽  
Combustion Engine ◽  
Exhaust Gas ◽  
Adaptation Process ◽  
Compressed Natural Gas ◽  
Gas Emissions ◽  
Exhaust Gas Emissions ◽  
Gas Supply

scholarly journals Investigation of Burn Duration and NO Emission in Lean Mixture with CNG and Gasoline

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4432 ◽  
Author(s):  
Doğan ◽  
Kutlar ◽  
Javadzadehkalkhoran ◽  
Demirci
Keyword(s):  
Natural Gas ◽  
Operating Conditions ◽  
Exhaust Gas ◽  
High Compression Ratio ◽  
Compressed Natural Gas ◽  
Lean Mixture ◽  
Cyclic Variations ◽  
Time Cycle ◽  
Exhaust Gas Emissions ◽  
No Emissions

The results of experiments performed by gasoline and natural gas fuels in a single cylinder research engine were evaluated in this study. The main objective of this study is to compare exhaust gas emissions, efficiency, and burn durations for both fuels in stoichiometric and lean mixture. At the same time, cycle to cycle variation in these operating conditions should not exceed an acceptable value. In the ultra-lean mixture, gasoline fuel exceeded this determined limit before Compressed Natural Gas (CNG). Therefore, the reduction in NO was restricted by cyclic variations. In combustion analysis, although the burn duration of the gasoline in stoichiometric conditions was shorter than CNG, this situation reversed in favor of CNG in the ultra-lean mixtures. Contrary to some studies in the literature, the spark advance and ignition delay for CNG were the same or shorter than gasoline in this study. The primary reasons for this change are the high compression ratio and the different combustion chamber geometry. The increase in turbulence intensity has different effects on CNG and gasoline. As a result, it has been observed that NO emissions can meet the limits without a loss of efficiency for this engine operated with CNG under the ultra-lean mixture.

Effects of Compressed Natural Gas (CNG) Injector Position on Intake Manifold towards Diesel-CNG Dual Fuel (DDF) Engine Performance

2014 ◽  
Vol 70 (1) ◽  
Author(s):  
A. Supee ◽  
R. Mohsin ◽  
Z. A. Majid ◽  
M. I. Raiz
Keyword(s):  
Diesel Engine ◽  
Kinetic Energy ◽  
Natural Gas ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Intake Manifold ◽  
Dual Fuel ◽  
Exhaust Gas ◽  
Compressed Natural Gas ◽  
Exhaust Gas Emissions

In Diesel-CNG (Compressed Natural Gas) Dual Fuel (DDF) system, CNG is generally inducted in the intake manifold by CNG injector which is mounted on the intake manifold whereas diesel fuel is directly injected into engine cylinder using existing diesel fuel injector system. Status quo of optimum CNG injector position on intake manifold will  provide better gaseous fuel mixing quality, produce high turbulence kinetic energy and thus improve the performance of the diesel engine under DDF system. Thus, under full load condition at 2750 rpm, the engine performance and exhaust gas emissions tests such as nitric oxides (NOx), carbon dioxide (CO2), carbon monoxide (CO) and hydrocarbon (HC) were conducted on a diesel engine under DDF system for optimization of CNG injector position. Four CNG injector position on intake manifold were selected and optimum position of CNG injector was found to be at "position 2" which results in higher power output and less exhaust gas emissions. Further analysis by Computational Fluid Dynamics (CFD) shows that CNG injector at "position 2" exhibit better quality of homogeneous CNG-air mixture and higher turbulence kinetic energy compared to other position. Based on the findings, an optimization of CNG injector position on intake manifold provide promising modification method due to the simple, cheaper and commercially acceptable.

scholarly journals A dynamic test of a vehicle in motion and exhaust gas emissions during alternative fuelling with gasoline and compressed natural gas (CNG)

2008 ◽  
Vol 134 (3) ◽  
pp. 52-60
Author(s):  
Krzysztof PARCZEWSKI ◽  
Kazimierz ROMANISZYN ◽  
Henryk WNĘK
Keyword(s):  
Dynamic Test ◽  
Published Data ◽  
Exhaust Gas ◽  
Test Results ◽  
Fuel Type ◽  
Compressed Natural Gas ◽  
Gas Emissions ◽  
Aggregated Data ◽  
Driving Cycles ◽  
Exhaust Gas Emissions

The majority of published data on exhaust gas emissions is cited based on the test results from the NEDC driving cycle. This paper specifies the methodology of how to develop dynamic characteristics of the emissions, based on the aggregated data from the measurement of modal emissions obtained in the course of NEDC and FTP-75 driving cycles for gasoline and CNG fuelling. The presented characteristics concern a real passenger car which was tested, then the characteristics were used to calculate the exhaust gas emissions during a specially developed driving test comprising four main motion resistances and engine braking. The effect of fuel type on selected emissions of exhaust gas components has also been compared and assessed.

Influencing Parameters of the Exhaust Gas Emissions of a Stoichiometric Natural Gas Bus in Real Use

2001 ◽  
Author(s):  
L. Pelkmans ◽  
M. Van Poppel ◽  
D. De Keukeleere ◽  
M. Gambino ◽  
S. Iannaccone
Keyword(s):  
Natural Gas ◽  
Exhaust Gas ◽  
Gas Emissions ◽  
Influencing Parameters ◽  
Exhaust Gas Emissions
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