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Transient Emissions Tests of Cummins N-14 Natural Gas Engine
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English
Abstract
A heavy-duty engine testing project involving Cummins Engine Company, Southwest Research Institute (SwRI), and West Virginia University (WVU) has been completed. This project evaluated the transient exhaust gas emissions rate of Cummins N-14 heavy-duty diesel engines converted to natural gas. Three heavy-duty N-14 diesel engines were converted to run on natural gas using a lean burn strategy by SwRI and are in field service in Santa Barbara Air Pollution Control District (SBAPCD). Two of the engines were tested under a steady-state cycle that simulates the U.S. heavy-duty transient cycle. The third engine was tested at the WVU Engine Research Laboratory following the U.S. Federal Test Procedure (FTP). However, at WVU, lean burn combustion strategy was shifted rich of stoichiometric during idling time of the FTP test. This may have caused the engine to produce more total hydrocarbons (THC) and carbon monoxide (CO).
For the simulated FTP tests at SwRI, the engines showed nitrogen oxides (NOx) emissions of 2.17 g/bhp-hr, THC emissions of 4.1 g/bhp-hr, and CO of 2.1 g/bhp-hr. At WVU, NOx emission was 2.33 g/bhp-hr, THC was 12.05 g/bhp-hr, and CO emission was 12.66 g/bhp-hr.
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Citation
Duffield, K., Bata, R., and Meyers, D., "Transient Emissions Tests of Cummins N-14 Natural Gas Engine," SAE Technical Paper 952653, 1995, https://doi.org/10.4271/952653.Also In
References
- Meyers, R. Meyers, D. Shahed, S.M. Duggal V. “Development of a Heavy On Highway Natural Gas-Fueled Engine,” SAE Paper, No. 922362
- Beck, N.J. “Natural Gas-A Rational Approach to Clean Air,” SAE Paper, No 902228
- Unich, A. Bata, R. Lyons D. “Natural Gas: A Promising Fuel For I.C. Engines,” SAE Paper No. 932826
- McDonnell, J.S. Piee, S.T. D'Arcy, J.B. Schreck R.M “Experimental Measurements of the Independent Effects of Dilution Ratio and Filter Temperature on Diesel Exhaust Particulate Samples,” SAE Paper No. 800185
- Smith, R. II. “Comparisons of Heavy Duty Diesel Engine Transient Emissions Measurement Using A Mini-and a Full-Flow Dilution Tunnel,” Department of Mechanical & Aerospace Engineering West Virginia University Morgantown, WV 1993
- Code of Federal Regulations 40 86 99 July 1994