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Annular Nozzle in Fixed Displacement Transmission Pump
Technical Paper
2011-01-0723
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
General Motor's new front wheel drive six speed 6T40 automatic transmission benefits from patented technology to control high speed pump cavitation that is innovative yet cost effective. An annular nozzle is created with careful pump inlet design by integrating a conical section in the filter neck to create a jet pump to prevent high speed cavitation for almost no additional cost. Excess oil from a fixed displacement pump is used to achieve an effective increase in pressure at the inlet of the rotating group during high speed operation. Control of high speed cavitation reduces pump noise and improves line pressure control stability.
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Authors
Citation
Schultz, J., "Annular Nozzle in Fixed Displacement Transmission Pump," SAE Technical Paper 2011-01-0723, 2011, https://doi.org/10.4271/2011-01-0723.Also In
References
- United States Patent US 7,281,904 B2 Oct 16 2007
- United States Patent US 7,331,771 B2 Feb 19 2008