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The Influence of Temperature Upon Gasoline Deposit Build-Up on the Intake Valves
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
The exact determination of air/fuel ratio for dynamic response of today's modern spark-ignition engines, makes them more sensitive to the effects of intake valve deposits.
The intake valve deposits work like a sponge and absorb the injected fuel during acceleration, which leads to a leaner air/fuel ratio. Non-uniform running may occur during engine warm-up and acceleration periods. The poorer running behavior of the engine increases the emissions and shortens the life time of the catalytic-converter. An increase in fuel consumption results.
A laboratory test procedure was developed and used to evaluate the liquid fuel's tendency to build deposits on the intake valves. A dynamometer cycle was used to reproduce the intake valve deposits. The intake valve's temperature was measured during the test cycle. The critical temperature range for gasoline deposit build-up was determined /1/.
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|Technical Paper||Mechanism of Intake-Valve Deposit Formation Part 2: Simulation Tests|
|Technical Paper||The Turboexpansion Concept - Initial Dynamometer Results|
CitationDaneshgari, P., Borgmann, K., and Job, H., "The Influence of Temperature Upon Gasoline Deposit Build-Up on the Intake Valves," SAE Technical Paper 890215, 1989, https://doi.org/10.4271/890215.
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