scholarly journals Expanding the Knock/Emissions/Misfire Limits for the Realization of Ultra-Low Emissions, High Efficiency Heavy Duty Natural Gas Engines

2021 ◽  
Author(s):  
Andrew Zdanowicz ◽  
Jeff Mohr ◽  
Diego Bestel ◽  
Juan Rueda ◽  
Anthony Marchese ◽  
...  
Keyword(s):  
Natural Gas ◽  
High Efficiency ◽  
Heavy Duty ◽  
Natural Gas Engines

High-Efficiency and Clean Combustion Natural Gas Engines for Vehicles

2019 ◽  
Vol 2 (4) ◽  
pp. 284-304 ◽  
Author(s):  
Fubai Li ◽  
Zhi Wang ◽  
Yunfei Wang ◽  
Boyuan Wang
Keyword(s):  
Natural Gas ◽  
High Efficiency ◽  
Natural Gas Engines ◽  
Clean Combustion

Evaluation of a Lean-Burn Natural Gas Engine Operating on Variable Methane Number Fuel

2011 ◽  
Author(s):  
Cory J. Kreutzer ◽  
Daniel B. Olsen ◽  
Robin J. Bremmer
Keyword(s):  
Natural Gas ◽  
High Efficiency ◽  
Engine Performance ◽  
Combustion Stability ◽  
Lean Burn ◽  
Natural Gas Engines ◽  
Spark Timing ◽  
Gas Compression ◽  
Fuel Blending ◽  
Methane Number

Wellhead gas from which pipeline natural gas originates has significant variability in composition due to natural variations in deposits. Gas quality is influenced by relative concentrations of both inert and hydrocarbon species. Gas compression engines utilizing wellhead gas as a fuel source often require significant installation time and adjustment of stock configuration due to fuel compositions that vary with time and location. Lean burn natural gas engines are chosen as wellhead compression engines for high efficiency and low emissions while minimizing the effect of variable gas composition. Ideal engine conditions are maintained by operating within the knock and misfire limits of the engine. Additional data is needed to find engine operational limitations. In this work, experimental data was collected on a Cummins GTA8.3SLB engine operating on variable methane number fuel under closed-loop equivalence ratio control. A fuel blending system was used to vary methane number to simulate wellhead compositions. NOx and CO emissions were found to increase with decreasing methane number while combustion stability remained constant. In addition, the effects of carbon dioxide and nitrogen diluents in the fuel were investigated. When diluents were present in the fuel, engine performance could be maintained by spark timing advance.

scholarly journals Towards the Development of a Conceptual Model for Pre-chamber Spark-Ignition High Efficiency Natural Gas Engines.

2020 ◽  
Author(s):  
Rajavasanth Rajasegar ◽  
Yoichi Niki ◽  
Garcia Jose Maria ◽  
Zheming Li ◽  
Mark Musculus
Keyword(s):  
Natural Gas ◽  
Conceptual Model ◽  
High Efficiency ◽  
Spark Ignition ◽  
Natural Gas Engines

Methane Dedicated Catalysts for Heavy-Duty Natural Gas Engines

1996 ◽  
Author(s):  
P. Corbo ◽  
M. Gambino ◽  
S. Iannaccone
Keyword(s):  
Natural Gas ◽  
Heavy Duty ◽  
Natural Gas Engines

Development of a Fiber Delivered Laser Ignition System for Natural Gas Engines

2006 ◽  
Author(s):  
Azer P. Yalin ◽  
Adam R. Reynolds ◽  
Sachin Joshi ◽  
Morgan W. Defoort ◽  
Bryan Willson ◽  
...  
Keyword(s):  
Natural Gas ◽  
Fiber Optics ◽  
High Efficiency ◽  
Low Cost ◽  
Laser Pulses ◽  
Hollow Fibers ◽  
Laser Source ◽  
Laser Ignition ◽  
Design Development ◽  
Natural Gas Engines

Laser ignition is viewed as a potential future technology for advanced high-efficiency low-emission natural gas engines. However, in order to make laser ignition systems more practical, thereby enabling them to transition from the laboratory to industrial settings, there is a need to develop fiber optically delivered ignition systems. Recent work at Colorado State University has shown the possibility of using coated hollow fibers for spark delivery and has demonstrated laser ignition and operation of a single engine cylinder using hollow fiber delivery. In order to practically operate a multiple cylinder engine, we envisage a simple and low-cost system based upon a single laser source being delivered (“multiplexed”) through multiple fibers to multiple engine cylinders. In this paper, we report on the design, development, and initial bench-top testing of a multiplexer. Bench-top testing showed that the multiplexer can be positioned with the required accuracy and precision for launching into fiber optics, and can be switched at the relatively high switching rates needed to operate modern natural gas engines. Another test employed the multiplexer to alternately launch laser pulses into a pair of hollow fibers in a way that allows spark creation downstream of the fibers.

Sign in / Sign up

Export Citation Format

Share Document