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Throttle Icing: Understanding the Icing Mechanism and Effects of Various Throttle Features
Technical Paper
2008-01-0439
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Some Electronic Throttle Control (ETC) Air Control Valves (ACV) on automotive internal combustion engines are susceptible to icing of the throttle valve. Ice formation can result in an increase in torque required to open or close the valve. Laboratory studies were conducted to improve the understanding of throttle valve icing on electronic throttle control valves with both aluminum and composite (plastic) bodies over various bore sizes (4 cylinder to 8 cylinder engines). Study results indicated that ice compression at the bore and valve gap, not ice adhesion, is the major contributor to the ETC-ACV icing phenomenon. In addition, testing of parts with various bore sizes, orientations and surface cleanliness resulted in further understanding of the icing issue.
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Citation
Galante-Fox, J., Jarvis, D., Garrick, R., and Chen, A., "Throttle Icing: Understanding the Icing Mechanism and Effects of Various Throttle Features," SAE Technical Paper 2008-01-0439, 2008, https://doi.org/10.4271/2008-01-0439.Also In
References
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