Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance 820463
A Tapered Element Oscillating Micro-balance (TEOM), consisting of a tapered tube fixed at the wide end with a filter element attached to the narrow end which is free to oscillate, can monitor diesel exhaust particulate by drawing a sample through the filter element. As particulate mass accumulates on the filter, a small change in the frequency of oscillation, directly related to mass, is detected in real-time. As described in this study TEOM sensitivity on the order of 5×10−8 g-sec−1 may be achieved over sample periods of 8-15 seconds. Two light duty diesel vehicles were tested using FTP-Bag III and NYCC driving schedules. For 29 vehicle tests, the mean ratio of total TEOM mass to simultaneously collected 47 mm filter samples was 0.96 (C.V. = 13%). Real-time TEOM data should prove valuable to particulate control technology efforts and environmental impact assessment.
Citation: Whitby, R., Gibbs, R., Johnson, R., Hill, B. et al., "Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance," SAE Technical Paper 820463, 1982, https://doi.org/10.4271/820463. Download Citation
R. Whitby, R. Gibbs, R. Johnson, B. Hill, S. Shimpi, R. Jorgenson
New York State Dept. of Environmental Conservation, Albany, NY, Cummins Engine Co., Columbus, IN
SAE International Congress and Exposition
Diesel Engine Combustion, Emissions, and Particulates-P-107, SAE 1982 Transactions-V91-A