| LPG发动机喷气占空比模型及其控制策略的研究 |
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| 引用本文： | 黄启锋,林有希,郭丽花.LPG发动机喷气占空比模型及其控制策略的研究[J].龙岩学院学报,2014(2):43-50,54. |
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| 作者姓名： | 黄启锋 林有希 郭丽花 |
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| 作者单位： | [1]龙岩学院,福建龙岩364012 [2]福州大学,福建福州350116 |
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| 基金项目： | 国家自然科学基金（51075074）;福建省教育厅A类项目（JA12313）. |
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| 摘 要： | 在理论空燃比燃烧条件下,研究某小功率LPG发动机喷气占空比的开环控制策略。在分析各种影响因素基础上,选择节气门开度和发动机转速作为影响喷气占空比的因素,拟合了喷气占空比多元线性回归方程。试验结果表明,回归方程拟合精确度高,占空比预测值与观测值之间的相对误差都不超过3.0%。在开环控制中,可以直接利用得到的回归方程取代喷气占空比MAP图进行软件编程,应用新控制系统后,超调量下降了7.0%。
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| 关 键 词： | LPG发动机 理论空燃比 喷气占空比 开环控制 多元线性回归方程 |
Model andControl Strategy of Jet Duty--cycle for LPG Engine |
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| HUANG Qifeng,LIN Youxi,GUO Lihua.Model andControl Strategy of Jet Duty--cycle for LPG Engine[J].Journal of Longyan Univercity,2014(2):43-50,54. |
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| Authors: | HUANG Qifeng LIN Youxi GUO Lihua |
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| Institution: | HUANG Qifeng, LIN Youxi, GUO Lihua |
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| Abstract: | On the condition of theoretical air--fuel ratio （A/F）, a study on the strategy of open --loop control of jet duty--cycle for some low--power LPG engine was carried out. The throttle percentage and engineer speed were selected as the effecting factors of jet duty cycle by analyzing various effecting factors, and a multivariate linear regression equation for jet duty--cycle was fitted. The result showed the regression equation has a high accuracy, and the relative errors between the observations and predictions are less than 3.0~. The regression equation, instead of map of jet duty--cycle, can be used directly for software programming for open--loop control, and the overshoot can be down by 7.0% based on the application of new control system. |
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| Keywords: | low power engine （LPG） theoretical A/F jet duty--cycle open loop control multivariate linearregression equation |
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