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Automatic Transmission Pump Testing
Project Brief
Transmission pump testing is conducted on a precision test stand for pump performance and comparative evaluations at Southwest Research Institute (SwRI). The stand configuration incorporates PID closed-loop control of speed and pressure, real-time measurements of torque, speed, pressure, temperature, viscosity and reaction ring position for variable displacement pumps. Automated real-time data acquisition is performed through a HP3852 and HP332 computer system providing test point and data repeatability within 0.75 percent in a three-signal distribution.
The major components of the stand consist of a 20-hp AC motor, variable frequency drive, 1,000 in.-lb in-line rotary transformer, temperature compensated pressure transducer, parallel heater exchanger circuit, driven by a 5-hp motor and pump system, a coriolis type flow meter and 5 kW immersion heater. Low temperature testing to -40°F is possible by incorporating a separate chiller circuit feeding the heat exchanger.
Operating parameters and accuracies are as follows:
For more information about our drivetrain engineering capabilities and past performance briefs, or how you can contract with SwRI, please contact Douglas Fussner at dfussner@swri.org or (210) 522-3972.
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| Design and Development | Engine, Emissions & Vehicle Research Division | SwRI Home | | ||||||||||||||||||||||||||||||||||
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Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 11 technical divisions. | ||||||||||||||||||||||||||||||||||
December 28, 2012 | ||||||||||||||||||||||||||||||||||
