Realtime Measurements for CO Characterization of In-Use Three-Way-Catalyst Vehicles 850134
The emissions test capability developed at New York's Automotive Emissions Laboratory is described as applied to realtime measurements from in-use three-way-catalyst vehicles. Realtime data from tailpipe emissions analyzers, engine air/fuel ratio analyzer, and vehicle speed/acceleration/power from an electric chassis dynamometer are polled several times per second by a minicomputer data acquisition system. These data are obtained in parallel with conventional CVS bag results. Examples of this capability are demonstrated with test results from two in-use computer-controlled catalyst cars. Results are shown as applied to modal analysis and inter-relationships among collected data.
State air pollution control program areas where this capability can be applied are suggested. Improvements and refinements are discussed in preparation for these tasks.
R. E. Gibbs, R. A. Whitby, J. D. Hyde, R. E. Johnson, B. J. Hill, P. L. Werner, T. E. Hoffman, P. A. Gabele
Automotive Emissions Laboratory, New York State Department of Environmental Conservation, Albany, NY, Mobile Sources Research Branch, U. S. Environmental Protection Agency, Research Triangle Park, NC