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Energy Consumption Test Methods and Results for Servo-Pump Continuously Variable Transmission Control System

UCD-ITS-RP-05-61

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Sustainable Transportation Energy Pathways (STEPS)

Suggested Citation: Bradley, T., Huff, B., and Frank, A., "Energy Consumption Test Methods and Results for Servo-Pump Continuously Variable Transmission Control System," SAE Technical Paper 2005-01-3782, 2005, doi:10.4271/2005-01-3782.

Test methods and data acquisition system specifications are described for measurements of the energy consumption of the control system of a servo-pump continuously variable transmission (CVT). Dynamic measurements of the power consumption of the servo-pump CVT control system show that the control system draws approximately 18.9 W-hrs of electrical energy over the HWFET cycle and 13.6 W-hrs over the 505 cycle. Sample results are presented of the dynamic power consumption of the servo-pump system under drive cycle conditions. Steady state measurements of the control power draw of the servo-pump CVT show a peak power consumption of 271 W, including lubrication power. The drive-cycle averaged and steady state energy consumption of the servo-pump CVT are compared to conventional CVT pump technologies.