Optimization of Natural Gas Engine Performance by Multidimensional Modeling

1997 ◽  
Author(s):  
DeHong Zhang ◽  
Steven H. Frankel
Keyword(s):  
Natural Gas ◽  
Engine Performance ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Multidimensional Modeling

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.

Evaluation of Engine Performance and Combustion in Natural Gas Engine with Pre-Chamber Plug under Lean Burn Conditions

2014 ◽  
Vol 8 (1) ◽  
pp. 221-229 ◽  
Author(s):  
Yoshitane Takashima ◽  
Hiroki Tanaka ◽  
Takahiro Sako ◽  
Masahiro Furutani
Keyword(s):  
Natural Gas ◽  
Engine Performance ◽  
Lean Burn ◽  
Gas Engine ◽  
Natural Gas Engine

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
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