This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Influence of Temperature Upon Gasoline Deposit Build-Up on the Intake Valves
Annotation ability available
Sector:
Language:
English
Abstract
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/.
Recommended Content
Technical Paper | Prediction of Combustion Chamber Deposit Growth in SI Engines |
Technical Paper | Mechanism of Intake-Valve Deposit Formation Part 2: Simulation Tests |
Technical Paper | Lubricants For Highly Turbocharged Direct-Injection Diesel Engines |
Authors
Citation
Daneshgari, 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.Also In
References
- Daneshgari P. Einfluβ des Kraftstoffes auf Einlaβventilver-kokung des Otto-Motors Dissertation Universität Karlsruhe 1988
- Daneshgari P. Schāfer H. V. Einfluβ des Kraftstoffes auf Einlaβventilverkokung MTZ October 1988
- Herstad O. Verdunstung und Klopffrage Oel und Kohle vereinigt mit Erdöl und Teer 1936 1937 1938 1939
- Nukiyama S. The Maximum and Minimum Values of the Heat Q Transmited From Metal to Boiling Water under Atmospheric Pressure Int. J. Heat and Mass Transfer 9 1419 1 1966
- Bitting B. Kohlhepp W. Intake Valve Deposits Fuel Detergency Requirements Revisited SAE 872117 International Fuel and Lubricant Meeting and Exposition Toronto, Ontario November 2-5, 1987
- Worthen R. P. Tunnecliffe T. N. Temperature Controlled Engine Valves SAE 820501 Int. Congress & Exposition Detroit, Michigan Feb. 22-26, 1982