Performance and Emissions of a Two-Stroke Engine Fueled Using High-Pressure Direct Injection of Natural Gas

1998 ◽  
Author(s):  
Brad Douville ◽  
Patric Ouellette ◽  
Alain Touchette ◽  
Buerebista Ursu
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Direct Injection ◽  
Performance And Emissions ◽  
Stroke Engine

scholarly journals An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2571 ◽  
Author(s):  
Jingrui Li ◽  
Jietuo Wang ◽  
Teng Liu ◽  
Jingjin Dong ◽  
Bo Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Fuel Consumption ◽  
Direct Injection ◽  
Gas Injection ◽  
Injection Rate ◽  
Emission Characteristics ◽  
Nox Emissions ◽  
Indicated Mean Effective Pressure ◽  
Marine Engines

High-pressure direct-injection (HPDI) natural gas marine engines are widely used because of their higher thermal efficiency and lower emissions. The effects of different injection rate shapes on the combustion and emission characteristics were studied to explore the appropriate gas injection rate shapes for a low-speed HPDI natural gas marine engine. A single-cylinder model was established and the CFD model was validated against experimental data from the literature; then, the combustion and emission characteristics of five different injection rate shapes were analyzed. The results showed that the peak values of in-cylinder pressure and heat release rate profiles of the triangle shape were highest due to the highest maximum injection rate, which occurred in a phase close to the top dead center. The shorter combustion duration of the triangle shape led to higher indicated mean effective pressure (IMEP) and NOx emissions compared with other shapes. The higher initial injection rates of the rectangle and slope shapes had a negative effect on the ignition delay periods of pilot fuel, which resulted in lower in-cylinder temperature and NOx emissions. However, due to the lower in-cylinder temperature, the engine power output was also lower. Otherwise, soot, unburned hydrocarbon (UHC), and CO emissions and indicated specific fuel consumption (ISFC) increased for both rectangle and slope shapes. The trapezoid and wedge shapes achieved a good balance between fuel consumption and emissions.

Kinetic Study of the Ignition Process of Methane/n-Heptane Fuel Blends under High-Pressure Direct-Injection Natural Gas Engine Conditions

2020 ◽  
Vol 34 (11) ◽  
pp. 14796-14813
Author(s):  
Jingrui Li ◽  
Xinlei Liu ◽  
Haifeng Liu ◽  
Ying Ye ◽  
Hu Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Kinetic Study ◽  
Direct Injection ◽  
Ignition Process ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Fuel Blends

scholarly journals The effects of partially premixed combustion mode on the performance and emissions of a direct injection natural gas engine

Fuel ◽  
2019 ◽  
Vol 250 ◽  
pp. 218-234 ◽  
Author(s):  
Menghan Li ◽  
Xuelong Zheng ◽  
Qiang Zhang ◽  
Zhenguo Li ◽  
Boxiong Shen ◽  
...  
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Premixed Combustion ◽  
Combustion Mode ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Partially Premixed Combustion ◽  
Performance And Emissions ◽  
Partially Premixed

Development of a Combustion Process for a High Performance 2-Stroke Engine with High Pressure Direct Injection

2004 ◽  
Author(s):  
Stephan Schmidt ◽  
Franz Winkler ◽  
Oliver Schoegl ◽  
Michael Pontoppidan
Keyword(s):  
High Pressure ◽  
High Performance ◽  
Direct Injection ◽  
Combustion Process ◽  
Stroke Engine

A Machine Learning Modeling Approach for High Pressure Direct Injection Dual Fuel Compressed Natural Gas Engines

2020 ◽  
Author(s):  
Michael Karpinski-Leydier ◽  
Ryozo Nagamune ◽  
Patrick Kirchen
Keyword(s):  
Machine Learning ◽  
High Pressure ◽  
Natural Gas ◽  
Direct Injection ◽  
Dual Fuel ◽  
Compressed Natural Gas ◽  
Natural Gas Engines ◽  
Modeling Approach

scholarly journals CFD Analysis of the Fuel–Air Mixture Formation Process in Passive Prechambers for Use in a High-Pressure Direct Injection (HPDI) Two-Stroke Engine

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2846 ◽  
Author(s):  
Marco Ciampolini ◽  
Simone Bigalli ◽  
Francesco Balduzzi ◽  
Alessandro Bianchini ◽  
Luca Romani ◽  
...  
Keyword(s):  
High Pressure ◽  
Direct Injection ◽  
Combustion Process ◽  
Operating Conditions ◽  
Low Temperature Combustion ◽  
Mixture Formation ◽  
Revolution Speed ◽  
Aspect Ratios ◽  
Scavenging Efficiency ◽  
Stroke Engine

The research on two-stroke engines has been focused lately on the development of direct injection systems for reducing the emissions of hydrocarbons by minimizing the fuel short-circuiting. Low temperature combustion (LTC) may be the next step to further improve emissions and fuel consumption; however, LTC requires unconventional ignition systems. Jet ignition, i.e., the use of prechambers to accelerate the combustion process, turned out to be an effective way to perform LTC. The present work aims at proving the feasibility of adopting passive prechambers in a high-pressure, direct injection, two-stroke engine through non-reactive computational fluid dynamics analyses. The goal of the analysis is the evaluation of the prechamber performance in terms of both scavenging efficiency of burnt gases and fuel/air mixture formation inside the prechamber volume itself, in order to guarantee the mixture ignitability. Two prechamber geometries, featuring different aspect ratios and orifice numbers, were investigated. The analyses were replicated for two different locations of the injection and for three operating conditions of the engine in terms of revolution speed and load. Upon examination of the results, the effectiveness of both prechambers was found to be strongly dependent on the injection setup.

Experimental study on the two-phase fuel transient injection characteristics of the high-pressure natural gas and diesel co-direct injection engine

Energy ◽  
2022 ◽  
pp. 123114
Author(s):  
Xiyu Yang ◽  
Xiaoyan Wang ◽  
Quan Dong ◽  
Zuo Ni ◽  
Jingdong Song ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Natural Gas ◽  
Direct Injection ◽  
Two Phase ◽  
Direct Injection Engine

Numerical investigations on pilot ignited high pressure direct injection natural gas engines: A review

2021 ◽  
Vol 150 ◽  
pp. 111390
Author(s):  
Menghan Li ◽  
Hanming Wu ◽  
Xiaori Liu ◽  
Zhangning Wei ◽  
Hongjian Tian ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Direct Injection ◽  
Natural Gas Engines ◽  
Numerical Investigations

A supercharged heavy-duty diesel single-cylinder research engine for high-pressure direct injection of natural gas

2003 ◽  
Vol 4 (4) ◽  
pp. 315-330 ◽  
Author(s):  
G. P. McTaggart-Cowan ◽  
W. K. Bushe ◽  
P. G. Hill ◽  
S. R. Munshi
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Direct Injection ◽  
Heavy Duty ◽  
Single Cylinder ◽  
Heavy Duty Diesel
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