Measured and Predicted Performance of a Downsized, Medium Duty, Natural Gas Engine

2017 ◽  
Author(s):  
Robert Draper ◽  
Brendan Lenski ◽  
Franz-Joseph Foltz ◽  
Roderick Beazley ◽  
William Tenny
Keyword(s):  
Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine

A Novel Control Method of Air Fuel Ratio for Natural Gas Engine*

2020 ◽  
Author(s):  
Wenyu Xiong ◽  
Qiang Sun ◽  
Anwen Shen ◽  
Jinbang Xu
Keyword(s):  
Natural Gas ◽  
Control Method ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Fuel Ratio

Evaluation of emission characteristics of a stoichiometric natural gas engine fueled with compressed natural gas and biomethane

Energy ◽  
2021 ◽  
pp. 119766
Author(s):  
Sangho Lee ◽  
Ui Hyung Yi ◽  
Hyungjoon Jang ◽  
Cheolwoong Park ◽  
Changgi Kim
Keyword(s):  
Natural Gas ◽  
Emission Characteristics ◽  
Compressed Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine

A Turbocharged Lean-Burn 4.3 Liter Natural Gas Engine

1995 ◽  
Author(s):  
Dan D. Giordano ◽  
Peter W. Petersen
Keyword(s):  
Natural Gas ◽  
Lean Burn ◽  
Gas Engine ◽  
Natural Gas Engine

Impact of ignition energy on the combustion performance of an SI heavy-duty stoichiometric operation natural gas engine

Fuel ◽  
2022 ◽  
Vol 313 ◽  
pp. 122857
Author(s):  
Zhongshu Wang ◽  
Xing Su ◽  
Xiaoyan Wang ◽  
Demin Jia ◽  
Dan Wang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Ignition Energy ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Combustion Performance

scholarly journals Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics

2017 ◽  
Vol 17 (14) ◽  
pp. 8739-8755 ◽  
Author(s):  
Jenni Alanen ◽  
Pauli Simonen ◽  
Sanna Saarikoski ◽  
Hilkka Timonen ◽  
Oskari Kangasniemi ◽  
...  
Keyword(s):  
Air Quality ◽  
Natural Gas ◽  
Particulate Emissions ◽  
Engine Exhaust ◽  
Gas Engine ◽  
Secondary Aerosol ◽  
Formation Potential ◽  
Natural Gas Engine ◽  
Evaporation Temperature ◽  
Catalyst Temperature

Abstract. Natural gas usage in the traffic and energy production sectors is a growing trend worldwide; thus, an assessment of its effects on air quality, human health and climate is required. Engine exhaust is a source of primary particulate emissions and secondary aerosol precursors, which both contribute to air quality and can cause adverse health effects. Technologies, such as cleaner engines or fuels, that produce less primary and secondary aerosols could potentially significantly decrease atmospheric particle concentrations and their adverse effects. In this study, we used a potential aerosol mass (PAM) chamber to investigate the secondary aerosol formation potential of natural gas engine exhaust. The PAM chamber was used with a constant UV-light voltage, which resulted in relatively long equivalent atmospheric ages of 11 days at most. The studied retro-fitted natural gas engine exhaust was observed to form secondary aerosol. The mass of the total aged particles, i.e., particle mass measured downstream of the PAM chamber, was 6–268 times as high as the mass of the emitted primary exhaust particles. The secondary organic aerosol (SOA) formation potential was measured to be 9–20 mg kgfuel−1. The total aged particles mainly consisted of organic matter, nitrate, sulfate and ammonium, with the fractions depending on exhaust after-treatment and the engine parameters used. Also, the volatility, composition and concentration of the total aged particles were found to depend on the engine operating mode, catalyst temperature and catalyst type. For example, a high catalyst temperature promoted the formation of sulfate particles, whereas a low catalyst temperature promoted nitrate formation. However, in particular, the concentration of nitrate needed a long time to stabilize – more than half an hour – which complicated the conclusions but also indicates the sensitivity of nitrate measurements on experimental parameters such as emission source and system temperatures. Sulfate was measured to have the highest evaporation temperature, and nitrate had the lowest. The evaporation temperature of ammonium depended on the fractions of nitrate and sulfate in the particles. The average volatility of the total aged particles was measured to be lower than that of primary particles, indicating better stability of the aged natural gas engine-emitted aerosol in the atmosphere. According to the results of this study, the exhaust of a natural gas engine equipped with a catalyst forms secondary aerosol when the atmospheric ages in a PAM chamber are several days long. The secondary aerosol matter has different physical characteristics from those of primary particulate emissions.

Natural Gas Engine Oil Development

1991 ◽  
Author(s):  
Mónica Graciela Vázquez ◽  
Patricia Errecalde ◽  
Sergio Fabián Seín ◽  
Daniel Gonzalez
Keyword(s):  
Natural Gas ◽  
Engine Oil ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Oil Development

Ignition System Designed to Extend the Plug Life, and the Lean Limit in a Natural Gas Engine

2003 ◽  
Author(s):  
A. K. Chan ◽  
S. H. Waters
Keyword(s):  
Natural Gas ◽  
Engine Performance ◽  
Ignition System ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Dc System ◽  
Spark Plug ◽  
Long Duration ◽  
Discharge Duration ◽  
Lean Limit

An ignition system that is based on the alternating (AC) rather than the traditional direct (DC) current in the spark plug discharge has been developed at the Caterpillar Technical Center. This system can generate a long duration discharge with controllable power. It is believed that such an ignition system can provide both a leaner operating limit and a longer spark plug life than a traditional DC system due to the long discharge duration and the low discharge power. The AC ignition system has successfully been tested on a Caterpillar single cylinder G3500 natural gas engine to determine the effects on the engine performance, combustion characteristics and emissions. The test results indicate that while the AC ignition system has only a small impact on engine performance (with respect to a traditional DC system), it does extend the lean limit with lower NOx emissions. Evidences also show the potential of reduce spark plug electrode erosions from the low breakdown and sustaining discharge powers from the AC ignition system. This paper summarizes the prototype design and engine demonstration results of the AC ignition system.

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