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Optimizing Automatic Transmission Filtration
Technical Paper
1999-01-0004
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The increasing focus on automotive automatic transmission contamination levels needs to result in both dramatic manufacturing system changes and transmission filtration needs. This paper focuses on defining and quantifying automatic transmission contaminant levels and the filtration needed to remove this contaminant.
Specific data are presented which quantify the particle count and gravimetric level of transmissions oil samples. The debris found from numerous used filter analyses is also presented. Representative transmission valve contaminant sensitivity data is then shown which highlights the deleterious effect contaminant has on transmission valve operation.
This paper concludes with the particle removal efficiency of common transmission sump filters being shown to be unable to remove many of the most damaging particles which result in transmission valve sticking, wear, and general shift quality degradation. Recommendations for correcting this situation are presented.
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Topic
Citation
Eleftherakis, J. and Khalil, I., "Optimizing Automatic Transmission Filtration," SAE Technical Paper 1999-01-0004, 1999, https://doi.org/10.4271/1999-01-0004.Also In
References
- Eleftherakis, John G. “ Contaminant Sensitivity Assessment of Electrohyraulic Valves ,” SAE Paper 891867 Society of Automotive Engineers Warrendale, PA 1989
- Eleftherakis, John G. “ Determining Valve Contaminant Sensitivity Effect Using Two Contaminants ,” SAE Paper 910960 Society of Automotive Engineers Warrendale, PA 1991
- Eleftherakis, John G. “ A Proven Approach to System Contamination Control Using the ERASE™ Approach ,” International Fluid Power Exhibition National Fluid Power Association Milwaukee, WI April 1996
- Eleftherakis, John G., Ibrahim Khalil “ Development of a Laboratory Test Contaminant for Transmissions ,” SAE Paper 900561 Society of Automotive Engineers Warrendale, PA 1990
- Eleftherakis, John G. “ A Primer on Particle Counting .” Hydraulics and Pneumatics Penton Publishing Cleveland, OH 34 36 November 1992