Lean Burn Natural Gas Spark Ignition Engine - An Overview

2003 ◽  
Author(s):  
A. Manivannan ◽  
P. Tamil Porai ◽  
S. Chandrasekaran ◽  
R. Ramprabhu
Keyword(s):  
Natural Gas ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lean Burn

Hydrogen Blended Natural Gas Operation of a Heavy Duty Turbocharged Lean Burn Spark Ignition Engine

2004 ◽  
Author(s):  
S. R. Munshi ◽  
C. Nedelcu ◽  
J. Harris ◽  
T. Edwards ◽  
J. Williams ◽  
...  
Keyword(s):  
Natural Gas ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Heavy Duty ◽  
Lean Burn

An Experimental Study of Cyclic Variations in a Lean Burn Natural Gas Fuelled Spark Ignition Engine

2003 ◽  
Author(s):  
A. Ramesh ◽  
Mohand Tazerout ◽  
Olivier Le Corre
Keyword(s):  
Natural Gas ◽  
Heat Release ◽  
Pressure Rise ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
High Rate ◽  
Lean Burn ◽  
Complete Combustion ◽  
Average Value ◽  
Indicated Mean Effective Pressure

This work deals with the nature of cycle by cycle variations in a single cylinder, lean burn, natural gas fuelled spark ignition engine operated at a constant speed of 1500 rev/min under variable equivalence ratio, fixed throttle conditions. Cycle by cycle variations in important parameters like indicated mean effective pressure (IMEP), peak pressure, rate of pressure rise and heat release characteristics were studied. At the lean misfire limit there was a drastic increase in combustion duration. With mixtures leaner than the lean limit, good cycles generally followed poor cycles. However, the vice versa was not true. Cycles that had a high initial heat release rate lead to more complete combustion. A high rate of pressure rise led to a high IMEP. The IMEP of cycles versus their frequency of occurrence was symmetric about the average value when the combustion was good.

Laser Spark Ignition: Laser Development and Engine Testing

2004 ◽  
Author(s):  
Michael H. McMillian ◽  
Steven D. Woodruff ◽  
Steven W. Richardson ◽  
Dustin L. McIntyre
Keyword(s):  
Natural Gas ◽  
Laser System ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lean Burn ◽  
Engine Operation ◽  
Natural Gas Engines ◽  
Laser Spark ◽  
Engine Testing ◽  
Laser Spark Ignition

Evermore demanding market and legislative pressures require stationary lean-burn natural gas engines to operate at higher efficiencies and reduced levels of emissions. Higher in-cylinder pressures and leaner air/fuel ratios are required in order to meet these demands. Contemporary ignition systems, more specifically spark plug performance and durability, suffer as a result of the increase in spark energy required to maintain suitable engine operation under these conditions. This paper presents a discussion of the need for an improved ignition source for advanced stationary natural gas engines and introduces laser spark ignition as a potential solution to that need. Recent laser spark ignition engine testing with natural gas fuel including NOx mapping is discussed. A prototype laser system in constructed and tested and the results are discussed and solutions provided for improving the laser system output pulse energy and pulse characteristics.

Lean Burn Performance of a Natural Gas Fuelled, Port Injected, Spark Ignition Engine

2012 ◽  
Author(s):  
Payman Abbasi Atibeh ◽  
Peter A. Dennis ◽  
Pedro J. Orbaiz ◽  
Michael J. Brear ◽  
Harry C. Watson
Keyword(s):  
Natural Gas ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lean Burn

An experimental study the impact of the hydrogen enrichment on cycle-to-cycle variations of the large bore and lean burn natural gas spark-ignition engine

Fuel ◽  
2020 ◽  
Vol 282 ◽  
pp. 118868 ◽  
Author(s):  
Xiongbo Duan ◽  
Banglin Deng ◽  
Yiqun Liu ◽  
Shunzhang Zou ◽  
Jingping Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lean Burn ◽  
Hydrogen Enrichment ◽  
The Impact

Optical analysis of flame inception and propagation in a lean-burn natural-gas spark-ignition engine with a bowl-in-piston geometry

2019 ◽  
Vol 21 (9) ◽  
pp. 1584-1596 ◽  
Author(s):  
Jinlong Liu ◽  
Cosmin Emil Dumitrescu
Keyword(s):  
Natural Gas ◽  
Flame Propagation ◽  
Diesel Engines ◽  
Pressure Rise ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Expansion Velocity ◽  
Cylinder Pressure ◽  
Lean Burn ◽  
Piston Bowl

Heavy-duty diesel engines can convert to lean-burn natural-gas spark-ignition operation through the addition of a gas injector in the intake manifold and of a spark plug in place of the diesel injector to initiate and control combustion. However, the combustion phenomena in such converted engines usually consist of two distinct stages: a fast-burning stage inside the piston bowl followed by a slow-burning stage inside the squish area. This study used flame luminosity data and in-cylinder pressure measurements to analyze flame propagation inside a bowl-in-piston geometry. The experimental results showed a low coefficient of variation and standard deviation of peak cylinder pressure, moderate rate of pressure rise, and no knocking for the lean-burn (equivalence ratio 0.66), low-speed (900 r/min), and medium-load (6.6 bar IMEP) operating condition. Flame inception had a strong effect on the flame expansion velocity, which increased fast once the flame kernel established, but it reduced near the bowl edge and the entrance of the narrow squish region. However, the burn inside the bowl was very fast. In addition, the long duration of burn inside the squish indicated a much lower flame propagation speed for the outside-the-bowl combustion, which contributed to a long decreasing tail in the apparent heat release rate. Furthermore, cycles with fast flame inception and fast burn inside the bowl had a similar end of combustion with cycles with delayed flame inception and then a retarded burn inside the bowl, which indicated that the combustion inside the squish region determined the combustion duration. Overall, the results suggested that the spark event, the flame development inside the piston bowl, and the start of the second combustion stage affected the phasing and duration of the two combustion stages, which (subsequently) can affect engine efficiency and emissions of diesel engines converted to a lean-burn natural-gas spark-ignition operation.

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