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Appl. Sci. 2019, 9(8), 1591; https://doi.org/10.3390/app9081591

An Electric Load Simulator for Engine Camless Valvetrains

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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Received: 19 January 2019 / Revised: 1 April 2019 / Accepted: 15 April 2019 / Published: 17 April 2019
(This article belongs to the Section Mechanical Engineering)
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Abstract

Camless valvetrains have become a promising direction to improve the performance of internal combustion engines. In this paper, an electric load simulator is proposed to simulate and implement gas force on the exhaust valve for camless valvetrains under semi-physical conditions. According to test data, the 1D gas-dynamic model was established to get boundary conditions and initial values for 3D finite element simulation. The 3D finite element simulation model was solved to obtain the gas force characteristics of the exhaust valve for camless valvetrains. The electromagnetic actuator was designed according to the system scheme and performance requirements of the electric load simulator. The PID (Proportion Integration Differentiation) algorithm was designed to control the output force of the electric load simulator and reproduce the gas force characteristics of the exhaust valve. It was found that the output force of the electric load simulator could follow the variation of the target gas force and meet the performance requirements of the electric load simulator based on simulation results and experimental results. View Full-Text
Keywords: electric load simulator; electromagnetic actuator; gas force; camless valvetrains electric load simulator; electromagnetic actuator; gas force; camless valvetrains
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhang, L.; Liu, L.; Zhu, X.; Xu, Z. An Electric Load Simulator for Engine Camless Valvetrains. Appl. Sci. 2019, 9, 1591.

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