Research on Engine Characteristics Based on Cyclic Mode Variable Displacement Control

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research 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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.