共查询到19条相似文献,搜索用时 656 毫秒
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利用AVL公司开发的BOOST软件可宏观地描述发动机的热力学过程且优化发动机的性能,而AVL的CRUISE软件可调用BOOST建立的发动机模型.在进行道路循环工况的仿真时,须对发动机全部工况点进行准确的标定.文中采用BOOST开发了发动机的仿真模型.通过调整节气门开度和燃烧模型参数,标定了发动机在多个转速和负荷点的转矩、功率和油耗,较好地模拟了发动机的动力性和经济性.最后基于ECE循环工况,将此模型与CRUISE进行联合仿真,分析了发动机瞬态工况的动力性、油耗和NO_x排放等参数. 相似文献
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建立了用于模拟车辆实际运行状况的汽油发动机尾气排放实验测试系统,模拟荣光6450B微型车的不同行驶工况,对其主要有害排放物HC、CO、NOx进行采样,并对各排放物与行驶工况相对应的排放趋势及原因进行了分析。分析结果表明,不同行驶工况和行驶状态对HC、CO和NOx的排放影响较大,各行驶工况中,怠速、加速及减速比例越高,各有害气体的排放越高;当行驶工况匀速比例较高时,排放相对较低。 相似文献
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详细地介绍了汽油机加速工况时准维燃烧模型的建立过程。分析了加速工况和稳态工况下模型的区别,提出了加速工况时对稳态工况下模型的空燃比AF、充气效率、传热系数进行修正的方法。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(3):193-216
This paper presents vibration control of a passenger vehicle using an electronically controllable electro-rheological (ER) engine mount. A mixed-mode ER engine mount operating under the flow and shear modes is devised and manufactured. After establishing the dynamic model of the proposed ER engine mount, both field-dependent displacement transmissibility and dynamic stiffness of the ER engine mount are empirically evaluated. The ER engine mount is then incorporated with a full-vehicle model in order to investigate vibration control performance at the driver's seat position. The governing equation of motion of the full-vehicle model is formulated by considering engine excitation force, followed by designing a skyhook controller to attenuate unwanted vibration. The controller is implemented through a hardware-in-the-loop simulation (HILS), and control responses such as acceleration level at idle speed are evaluated in the frequency and time domains. 相似文献
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Seung-Bok S. Choi Hyun-Jeong H. Song 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2002,37(3):193-216
This paper presents vibration control of a passenger vehicle using an electronically controllable electro-rheological (ER) engine mount. A mixed-mode ER engine mount operating under the flow and shear modes is devised and manufactured. After establishing the dynamic model of the proposed ER engine mount, both field-dependent displacement transmissibility and dynamic stiffness of the ER engine mount are empirically evaluated. The ER engine mount is then incorporated with a full-vehicle model in order to investigate vibration control performance at the driver's seat position. The governing equation of motion of the full-vehicle model is formulated by considering engine excitation force, followed by designing a skyhook controller to attenuate unwanted vibration. The controller is implemented through a hardware-in-the-loop simulation (HILS), and control responses such as acceleration level at idle speed are evaluated in the frequency and time domains. 相似文献
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为了解决汽车在仿真中加速度行驶的控制问题,基于功率平衡原理,对汽车行驶中的受力进行分析,建立汽车发动机逆模型,完成汽车加速度控制方法的建立。在matlab/simulink环境中建立汽车加速度控制算法,在汽车的加速度分别为1m/s~2,2m/s~2,3m/s~2进行仿真验证,仿真结果表明:随着行驶加速度的增加,控制器对汽车行驶速度的控制精度逐渐下降,并且速度偏差随之增大,但是基本可以保证汽车的行驶速度按照参考速度的变化趋势变化。 相似文献