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Closed Loop Pressure Control System Requirements and Implementation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2011 by SAE International in United States
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Electro-hydraulic actuation has been used widely in automatic transmission designs. With greater demand for premium shift quality of automatic transmissions, higher pressure control accuracy of the transmission electro-hydraulic control system has become one of the main factors for meeting this growing demand. This demand has been the driving force for the development of closed loop pressure controls technology.
This paper presents the further research done based upon a previously developed closed loop system. The focus for this research is on the system requirements, such as solenoid driver selection and system latency handling. Both spin-stand and test vehicle setups are discussed in detail. Test results for various configurations are given.
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CitationZheng, Q., Church, B., and Defore, K., "Closed Loop Pressure Control System Requirements and Implementation," SAE Technical Paper 2011-01-0391, 2011, https://doi.org/10.4271/2011-01-0391.
- Zheng, Q., Kraenzlein, J., Hopkins, E., Moses, R.L. et al., “Closed Loop Pressure Control System Development for an Automatic Transmission,” SAE Technical Paper 2009-01-0951, 2009, doi:10.4271/2009-01-0951.