Research on Engine Characteristics Based on Cyclic Mode Variable Displacement Control

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

International Journal of Automotive Technology Pub Date : 2024-07-24 DOI:10.1007/s12239-024-00106-7

Zhaohui Jin, Dayou Lu, Tian You, Fangxi Xie

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Abstract

Aiming at the problem of torque fluctuations and intake pressure fluctuations caused by cycle cylinder deactivation, we introduced a refined control strategy encompassing fixed cycle frequency with fixed deactivation frequency, variable cycle frequency with fixed deactivation frequency, and variable cycle frequency with variable deactivation frequency. The cycle cylinder deactivation rate is determined by controlling the cycle frequency and the cylinder deactivation frequency, which provides a new method for exploring the torque fluctuation of the cycle cylinder deactivation. Furthermore, we introduced an intake compensation method based on the cylinder deactivation compensation coordinate system is proposed. The non-uniformity of the intake air volume of each cylinder of the cycle cylinder deactivation is improved by changing the valve lift. After compensation, the non-uniformity of the intake air volume and the mean indicated pressure of each cylinder are within 2%, and the maximum torque fluctuation is reduced by 52%. It provides a useful reference for enhancing the dynamic smoothness of cylinder deactivation in engines.

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基于循环模式变排量控制的发动机特性研究

针对循环停缸引起的扭矩波动和进气压力波动问题，我们引入了一种精细化控制策略，包括固定循环频率与固定停缸频率、固定停缸频率与可变循环频率以及可变循环频率与可变停缸频率。通过控制循环频率和气缸停用频率来确定循环气缸停用率，这为探索循环气缸停用的扭矩波动提供了一种新方法。此外，我们还提出了一种基于停缸补偿坐标系的进气补偿方法。通过改变气门升程来改善循环停缸各缸进气量的不均匀性。补偿后，各缸进气量不均匀度和平均指示压力均在 2% 以内，最大扭矩波动降低了 52%。这为提高发动机气缸停用的动态平稳性提供了有益的参考。

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来源期刊

International Journal of Automotive Technology 工程技术-工程：机械

CiteScore

3.10

自引率

12.50%

发文量

129

审稿时长

6 months

期刊介绍： The International Journal of Automotive Technology has as its objective the publication and dissemination of original research in all fields of AUTOMOTIVE TECHNOLOGY, SCIENCE and ENGINEERING. It fosters thus the exchange of ideas among researchers in different parts of the world and also among researchers who emphasize different aspects of the foundations and applications of the field. Standing as it does at the cross-roads of Physics, Chemistry, Mechanics, Engineering Design and Materials Sciences, AUTOMOTIVE TECHNOLOGY is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from thermal engineering, flow analysis, structural analysis, modal analysis, control, vehicular electronics, mechatronis, electro-mechanical engineering, optimum design methods, ITS, and recycling. Interest extends from the basic science to technology applications with analytical, experimental and numerical studies. The emphasis is placed on contributions that appear to be of permanent interest to research workers and engineers in the field. If furthering knowledge in the area of principal concern of the Journal, papers of primary interest to the innovative disciplines of AUTOMOTIVE TECHNOLOGY, SCIENCE and ENGINEERING may be published. Papers that are merely illustrations of established principles and procedures, even though possibly containing new numerical or experimental data, will generally not be published. When outstanding advances are made in existing areas or when new areas have been developed to a definitive stage, special review articles will be considered by the editors. No length limitations for contributions are set, but only concisely written papers are published. Brief articles are considered on the basis of technical merit.