Engine Oil Additive Effects on the Deterioration of a Stoichiometric Emissions Control (C-4) System 790941
Phosphorus, originating from the commonly used engine oil additive zinc dialkyldithiophosphate (ZDP), contributed to the deterioration in the performance of a stoichiometric emissions control system. Data obtained from a series of 200-hour engine-dynamometer tests suggest two separate means for phosphorus-induced system deterioration: reduced CO, NOx, and HC conversion efficiencies due to catalyst poisoning; increased oxygen sensor rich-to-lean response time and altered oxygen sensor output voltage due to sensor contamination. The presence of an alkaline metal detergent in the ZDP-containing engine oil resulted in less deterioration of converter HC efficiency, but had no effect on the other system performance parameters.
Citation: Caracciolo, F. and Spearot, J., "Engine Oil Additive Effects on the Deterioration of a Stoichiometric Emissions Control (C-4) System," SAE Technical Paper 790941, 1979, https://doi.org/10.4271/790941. Download Citation
Author(s):
Frank Caracciolo, James A. Spearot
Affiliated:
Fuels and Lubricants Dept., General Motors Research Labs. Warren, MI
Pages: 17
Event:
1979 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Emissions control
Control systems
Wear
Reaction and response times
Oxygen
Catalysts
Metals
Sensors and actuators
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