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Electro-Hydraulic Fully Flexible Valve Actuation System for Engine Test Cell
Technical Paper
2010-01-1200
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fully Flexible Valve Actuation (FFVA) systems provide maximum flexibility to adjust lift profiles of engine intake and exhaust valves. A research grade electro-hydraulic servo valve based FFVA system was designed to be used with an engine in a test cell to precisely follow desired lift profiles. Repetitive control was chosen as the control strategy. Crank angle instead of time is used to trigger execution to ensure repeatability. A single control is used for different engine speeds even though the period for one revolution changes with engine speeds. The paper also discusses lift profile extension, instantaneous lift profile switching capability and built-in safety features.
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Citation
Chen, J., "Electro-Hydraulic Fully Flexible Valve Actuation System for Engine Test Cell," SAE Technical Paper 2010-01-1200, 2010, https://doi.org/10.4271/2010-01-1200.Also In
References
- Allen, J. Law, D. “Production Electro-Hydraulic Variable Valve-Train for a New Generation of IC Engines,” SAE Technical Paper 2002-01-1109 2002
- Sun, Z. Cleary, D. “Dynamics and Control of an Electro-Hydraulic Fully Flexible Valve Actuation System” Proceedings of the American Control Conference 2003
- Sun, Z. Kuo, T.-W. “Electro-Hydraulic Fully Flexible Valve Actuation System for Advanced Combustion Development” Proceedings of the FISITA World Congress 2006
- Tomizuka, M. Tsao, T.-C. Chew, K.-K. “Analysis and Synthesis of Discrete-Time Repetitive Controllers” Transactions of the ASME, Journal of Dynamic Systems, Measurement and Control 111 1989
- Tomizuka, M. “Zero Phase Error Tracking Algorithm for Digital Control” Transactions of the ASME, Journal of Dynamic Systems, Measurement, and Control 109 1987
- Tsao, T.-C. Tomizuka, M. “Robust Adaptive and Repetitive Digital Tracking Control and Application to a Hydraulic Servo for Noncircular Machining” Transactions of the ASME, Journal of Dynamic Systems, Measurement, and Control 116 1994