Transient Emissions from Two Natural Gas-Fueled Heavy-Duty Engines

1993 ◽  
Author(s):  
Christopher A. Sharp ◽  
Terry L. Ullman ◽  
Kenneth R. Stamper
Keyword(s):  
Natural Gas ◽  
Heavy Duty ◽  
Gas Fueled ◽  
Transient Emissions

Development of a Heavy Duty On-Highway Natural Gas-Fueled Engine

1992 ◽  
Author(s):  
Roy Meyer ◽  
David Meyers ◽  
Syed M. Shahed ◽  
Vinod K. Duggal
Keyword(s):  
Natural Gas ◽  
Heavy Duty ◽  
Gas Fueled

In-Use Emissions from Natural Gas Fueled Heavy-Duty Vehicles

1999 ◽  
Author(s):  
Robert L. McCormick ◽  
Michael S. Graboski ◽  
Teresa Alleman ◽  
Andrew M. Herring ◽  
Paul Nelson
Keyword(s):  
Natural Gas ◽  
Heavy Duty ◽  
Gas Fueled ◽  
Heavy Duty Vehicles

Effect of an economical oxidation catalyst formulation on regulated and unregulated pollutants from natural gas fueled heavy duty transit buses

2011 ◽  
Vol 16 (6) ◽  
pp. 469-473 ◽  
Author(s):  
Arvind Thiruvengadam ◽  
Daniel K. Carder ◽  
Mohan Krishnamurthy ◽  
Adewale Oshinuga ◽  
Mridul Gautam
Keyword(s):  
Natural Gas ◽  
Oxidation Catalyst ◽  
Heavy Duty ◽  
Transit Buses ◽  
Gas Fueled

Experimental Investigation of a Heavy-Duty Compression-Ignition Engine Retrofitted to Natural Gas Spark-Ignition Operation

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
Jinlong Liu ◽  
Hemanth Kumar Bommisetty ◽  
Cosmin Emil Dumitrescu
Keyword(s):  
Natural Gas ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Compression Ignition ◽  
Heavy Duty ◽  
Compression Ignition Engine ◽  
Engine Operation ◽  
Cycle Variation ◽  
Spark Timing ◽  
Ci Engines

Heavy-duty compression-ignition (CI) engines converted to natural gas (NG) operation can reduce the dependence on petroleum-based fuels and curtail greenhouse gas emissions. Such an engine was converted to premixed NG spark-ignition (SI) operation through the addition of a gas injector in the intake manifold and of a spark plug in place of the diesel injector. Engine performance and combustion characteristics were investigated at several lean-burn operating conditions that changed fuel composition, spark timing, equivalence ratio, and engine speed. While the engine operation was stable, the reentrant bowl-in-piston (a characteristic of a CI engine) influenced the combustion event such as producing a significant late combustion, particularly for advanced spark timing. This was due to an important fraction of the fuel burning late in the squish region, which affected the end of combustion, the combustion duration, and the cycle-to-cycle variation. However, the lower cycle-to-cycle variation, stable combustion event, and the lack of knocking suggest a successful conversion of conventional diesel engines to NG SI operation using the approach described here.

Low Emissions Class 8 Heavy-Duty On-Highway Natural Gas and Gasoline Engine

2004 ◽  
Author(s):  
James P. Chiu ◽  
James Wegrzyn ◽  
Kenneth E. Murphy
Keyword(s):  
Natural Gas ◽  
Gasoline Engine ◽  
Heavy Duty
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