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New Variable Force Solenoid Driver IC with a Unique Controller Design Improves Solenoid Current Regulation
Technical Paper
2010-01-0371
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The majority of modern automatic transmissions make use of multiple Variable Force Solenoid (VFS) valves within the hydraulic controls. The requirements for the control of these valves are much more stringent in the latest transmission designs. This leads to challenging requirements for the electronic solenoid driver circuit used to regulate the current flowing through the solenoid valve coil. We have developed a current control method that is fundamentally different than those commonly used in solenoid driver circuits. This unique current control method results in several improvements in the key performance characteristics of the solenoid driver circuit, which in turn improves the performance of the transmission system. In addition, this new control method requires less effort to implement into a specific application than state of the art current control methods.
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Authors
Citation
Hartlieb, H., Hausmann, M., and Williams, K., "New Variable Force Solenoid Driver IC with a Unique Controller Design Improves Solenoid Current Regulation," SAE Technical Paper 2010-01-0371, 2010, https://doi.org/10.4271/2010-01-0371.Also In
References
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- Scherer, H. Gierer, G. “ZF 5-Speed Transmissions for Passenger Cars,” SAE Technical Paper 970689 1997
- Hartlieb, H. et al “Integrating Current Regulator and Method for Regulating Current” U.S. Patent 2009/0051336 Feb 26 2009
- Tan Thiam Poh, R. “Comparison of Hysteretic and Fix Frequency Current Control Method In Terms of Accuracy, Transient Response and Noise Immunity,” 7th International Conference on Power Electronics Daegu Korea 2007