Browse Publications Technical Papers 2001-01-3641
2001-09-24

Development Of Heavy-Duty Diesel Portable, On-Board Mass Exhaust Emissions Monitoring System With NOx, CO2 And Qualitative PM Capabilities 2001-01-3641

To complement laboratory emissions tests and to obtain emissions data for events that are difficult to simulate, a portable, on-board mass exhaust emissions monitoring system has been developed. The system utilizes NDIR for CO and CO2, an electrochemical cell for NOx and laser light scattering detectors for PM real-time concentrations measurements. Exhaust flow is determined computationally from engine operating data using mass balance equations. The system is designed to easily and quickly install on a large variety of vehicles, including buses with passengers on board, and to produce a wealth of on-road data with minimal downtime and travel of the vehicle tested.

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