| Evaluation and Control of Cyclic Variation in Spark Ignited Engines by a Thermodynamic Model |
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| 作者姓名： | 纪常伟 张红光 |
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| 作者单位： | DepartmentofAutomotiveEngineering,BeijingUniversityofTechnology,Beijing100022,China |
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| 基金项目： | SponsoredbySouthernCaliforniaAirQualityManagementDistrictThrottlessPremixedChargeEngines(51814592) |
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| 摘 要： | An evaluation method of engine cyclic variation is proposed based on fuzzy mathematics concept. The degree of engine cyclic variation is divided into 4 levels: stable, slight variation, moderate variation and serious variation based on the statistic standard deviation of residual gas temperatures within the specified simulation cycles and the function of cyclic variation is also inducted for the cyclic variation control. Because the degree of engine cyclic variation can be estimated qualitatively, the effective control means can be applied to appease the undesired cyclic variation. Simulation result shows that for a very serious cyclic variation through the proper adjustment of the spark angle and the cyclic variation will disappear.
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| 关 键 词： | 周期变化模型 火花引擎发动机 模糊数学 有效控制 |
| 收稿时间： | 2003/5/23 0:00:00 |
Evaluation and Control of Cyclic Variation in Spark Ignited Engines by a Thermodynamic Model |
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| JI Chang-wei and ZHANG Hong-guang.Evaluation and Control of Cyclic Variation in Spark Ignited Engines by a Thermodynamic Model[J].Journal of Beijing Institute of Technology,2004,13(2):215-219. |
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| Authors: | JI Chang-wei and ZHANG Hong-guang |
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| Affiliation: | Department of Automotive Engineering, Beijing University of Technology, Beijing 100022, China;Department of Automotive Engineering, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | An evaluation method of engine cyclic variation is proposed based on fuzzy mathematics concept. The degree of engine cyclic variation is divided into 4 levels: stable, slight variation, moderate variation and serious variation based on the statistic standard deviation of residual gas temperatures within the specified simulation cycles and the function of cyclic variation is also inducted for the cyclic variation control. Because the degree of engine cyclic variation can be estimated qualitatively, the effective control means can be applied to appease the undesired cyclic variation. Simulation result shows that for a very serious cyclic variation through the proper adjustment of the spark angle and the cyclic variation will disappear. |
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| Keywords: | cyclic variation model control spark ignited engines |
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