| 基于曲轴箱强制通风的汽油机进气模型修正研究 |
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| 引用本文： | 李顶根,李小中,黄荣华. 基于曲轴箱强制通风的汽油机进气模型修正研究[J]. 车用发动机, 2009, 0(1) |
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| 作者姓名： | 李顶根 李小中 黄荣华 |
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| 作者单位： | 华中科技大学能源与动力工程学院,湖北,武汉,430074;华中科技大学能源与动力工程学院,湖北,武汉,430074;华中科技大学能源与动力工程学院,湖北,武汉,430074 |
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| 摘 要： | 为了更加精确地确定汽油机空燃比,使发动机在不同工况下得到最佳的动力性、经济性和排放性能,需要定时、定量地提供当量空燃比。而喷油量是基于进气量变化的,所以精确地控制进气量是整个控制系统的基础。在传统的进气歧管空气流量平均值模型(MVEM)基础上,考虑了曲轴箱强制通风系统(PCV系统)对进气量的影响,并对改进后的模型在simulink环境下进行稳态和瞬态仿真。通过分析仿真结果,得出了改进模型的进气量和进气歧管压力等参数,模拟结果更能接近实际进气过程,空燃比控制精度得到提高。还对传统进气模型提出了一些改进方向。
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| 关 键 词： | 汽油机 进气 曲轴箱强制通风 数学模型 仿真 |
Study on Gasoline Intake Model Modification Based on PCV |
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| LI Ding-gen,LI Xiao-zhong,HUANG Rong-hua. Study on Gasoline Intake Model Modification Based on PCV[J]. Vehicle Engine, 2009, 0(1) |
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| Authors: | LI Ding-gen LI Xiao-zhong HUANG Rong-hua |
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| Affiliation: | LI Ding-gen,LI Xiao-zhong,HUANG Rong-hua(School of Energy , Power Engineering,Huazhong University of Science , Technology,Wuhan 430074,China) |
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| Abstract: | In order to acquire the optimal dynamic,economic and emission performance under different working conditions,the equivalent air-fuel ratio(AFR) should be controlled accurately and given in time.The injection quantity varied with the air inflow and so it was important to control the air inflow accurately.Based on the conventional mean value engine model(MVEM),the influence of positive crankcase ventilation(PCV) on air inflow was considered and the modified model was simulated with Simulink under the steady s... |
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| Keywords: | gasoline engine intake PCV mathematic model simulation |
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