Mechanisms of Polynuclear Aromatic Hydrocarbon Emissions from Automotive Engines 730835
Mechanisms that influence emissions of polynuclear aromatic hydrocarbons (PNA) from engines have been investigated with an on-line fluorescence PNA detector. PNA can accumulate at the surfaces and within the deposits of a combustion chamber, and some of these PNA are vaporized during engine operation. Increased heat input to established combustion chamber deposits (for example, from increased spark advance, knock, or high-speed operation) enhances PNA emissions, at least temporarily.
At several steady speeds, PNA emissions were compared, using a rotary engine vehicle and a similar car with a reciprocating spark ignition engine. With the emission control system disabled, the rotary engine automobile exhibits very high PNA emissions relative to the piston engine. However, exhaust emission control devices, such as the thermal reactor on the rotary engine car, can be highly effective in destroying PNA.
Citation: Laity, J., Malbin, M., Haskell, W., and Doty, W., "Mechanisms of Polynuclear Aromatic Hydrocarbon Emissions from Automotive Engines," SAE Technical Paper 730835, 1973, https://doi.org/10.4271/730835. Download Citation
Author(s):
J. L. Laity, M. D. Malbin, W. W. Haskell, W. I. Doty
Affiliated:
MTM Product Research & Development Laboratory, Shell Development Co.
Pages: 11
Event:
1973 SAE International Off-Highway and Powerplant Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1973 Transactions-V82-A
Related Topics:
Spark ignition engines
Emissions control
Rotary engines
Combustion chambers
Exhaust emissions
Hydrocarbons
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