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Clark, N.N., Lyons, D.W., Gautam, M., Bata, R.M., Wang, W.G., Norton, P. and Chandler, K. (1997) Natural Gas and Diesel Transit Bus Emissions Review and Recent Data. Proceedings of the SAE Truck and Bus Conference, Cleveland, 17-19 November 1997, SAE Paper 973203.

has been cited by the following article:

• TITLE: Atmospheric Carbon Dioxide and Nitrogen Oxides Emissions Data for 2003-2005 Model Year Trucks

  AUTHORS: Madhava R. Madireddy, Nigel N. Clark

  KEYWORDS: Emissions Inventory, Chassis Dynamometer, Instantaneous Emissions, NOx/CO2 Ratio, Certification

  JOURNAL NAME: American Journal of Climate Change, Vol.4 No.4, September 1, 2015

  ABSTRACT: Heavy-duty trucks account for a substantial portion of the atmospheric carbon dioxide (CO2) and nitrogen oxides (NOx) inventory. The data presented in this paper will help the research community be interested in developing models that predict the NOx and CO2 levels in real use. Continuous data of emissions were recorded from chassis dynamometer testing of five 2003-2005 model year (MY) heavy-duty trucks. The instantaneous emissions rate was plotted against axle power in all cases. The effect of vehicle test weight and the drive cycle employed on the relation between emissions rate (grams per sec) and axle power was studied. The NOx/CO2 ratio was found to be independent of the test cycle. The average NOx/CO2 ratio for the 2003-2005 MY trucks was found to be 0.0051, which agrees reasonably well with the estimated ratio of 0.0048, based on certification standards. The data were compared to those from 1994-2002 MY trucks; the average NOx/CO2 ratio for those trucks was 0.0141. For the 2003-2005 MY trucks, the distance specific NOx (grams per mile) and the fuel economy (miles per gallon) were less than those of 1994-2002 MY trucks.