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Design and Analysis of a Fully Variable Valve Actuation System

Author

Listed:
  • Longxin Jiang

    (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)

  • Liang Liu

    (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)

  • Xiaowei Peng

    (Shanghai Space Control Technology Research Institute, Shanghai 201109, China)

  • Zhaoping Xu

    (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)

Abstract

With the problem of environmental pollution and energy shortage becoming more and more serious, the fuel efficiency of automobile engines has attracted much attention, and variable valve technology is one of the important technologies to solve this problem. A novel fully variable valve actuation (FVVA) system based on a brushless direct current motor (BLDCM) is designed to achieve fully variable valve adjustment. The system uses a crank-moving guide rod mechanism to convert the rotary motion of the BLDCM into the linear motion of the valve. The fully variable valve system can realize real-time continuous adjustment of valve operating parameters through the motion control of BLDCM, including variable valve timing, variable valve opening duration, and variable lift. A BLDCM and a transmission mechanism for the FVVA system is designed in this paper. In order to better analyze the performance of the system, a dynamic model is established. Then, a three closed-loop control method is adopted to realize position control of the valve. Finally, a complete system model is established to verify the theory conclusions. The results show that the system can realize fully variable valve adjustment.

Suggested Citation

  • Longxin Jiang & Liang Liu & Xiaowei Peng & Zhaoping Xu, 2020. "Design and Analysis of a Fully Variable Valve Actuation System," Energies, MDPI, vol. 13(23), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6391-:d:455644
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    References listed on IDEAS

    as
    1. Li, Yangtao & Khajepour, Amir & Devaud, Cécile, 2018. "Realization of variable Otto-Atkinson cycle using variable timing hydraulic actuated valve train for performance and efficiency improvements in unthrottled gasoline engines," Applied Energy, Elsevier, vol. 222(C), pages 199-215.
    2. Li, Yangtao & Khajepour, Amir & Devaud, Cécile & Liu, Kaimin, 2017. "Power and fuel economy optimizations of gasoline engines using hydraulic variable valve actuation system," Applied Energy, Elsevier, vol. 206(C), pages 577-593.
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