Theoretical and Experimental Analysis of Dynamic Characteristics for a Valve Train System.
Theoretical and Experimental Analysis of Dynamic Characteristics for a Valve Train System.
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DOI：
10.3390/s21196328
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发表时间：
2021-09-22
期刊：
影响因子：
--
通讯作者：
Yin L
中科院分区：
文献类型：
--
作者：
Hu B;Li Y;Yin L
配气机构是发动机振动的主要来源之一，其动态性能对发动机的输出功率和燃油消耗率有着至关重要的影响。在配气机构的设计中应强调细长杆和梁的柔性，以开发具有工业应用的大功率和高速发动机。提出了一种配气机构柔性动力学模型。在该模型中，除凸轮和齿轮机构外，其他部件均被建模为具有多方向变形的柔性体。还考虑了凸轮轴、凸轮和齿轮盘的陀螺效应，以准确地预测高速下的动态响应。同时考虑了齿轮啮合、凸轮-凸轮副摩擦力、凸轮离心力和气门间隙等因素。通过壳体振动和推杆应力试验验证了模型的正确性。结果表明，该模型能较好地预测柔性部件的动态应力，并能预测壳体振动所呈现的趋势。该模型表明，过大的凸轮转速和气门间隙将导致强烈的反弹和跳跃现象。该模型可为设计发动机工作转速、调整气门间隙和提高部件耐久性提供重要参考。
The valve train is one of the main sources of engine vibration, and its dynamic performance is crucial for output power and fuel consumption. The flexibilities of slender bars and beams should be emphasised in the design of valve trains to develop high-power and high-speed engines with industrial applications. A flexible dynamic model of a valve train system is proposed. In the proposed model, the components, except the cam and gear bodies, are modelled as flexible bodies with multidirectional deformations. The gyroscopic effects of the camshaft, cams and gear discs are also considered to predict dynamic responses at high speeds accurately. Gear meshing, the friction of the cam–tappet pair, the centrifugal force of the cams and valve clearance are also considered. Experiments on housing vibration and pushrod stress are conducted to validate the proposed model. Results show that the proposed model can predict the dynamic stress of the flexible components well and predict the trend shown by the housing vibration. The proposed model shows that excessive cam rotation speed and valve clearance will cause intense bounce and jump phenomena. The proposed model can be an important reference for designing engine work speed, adjusting valve clearance and improving component durability.
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影响因子：
2.7
作者：
Teodorescu, M;Votsios, V;Taraza, D
通讯作者：
Taraza, D
具有柔性部件和陀螺效应的气门机构系统动态特性的预测和验证
影响因子：
5.2
作者：
Hu, Bo;Zhou, Changjiang;Yin, Lairong
通讯作者：
Yin, Lairong
DOI：
10.1115/1.2817043
发表时间：
1997-07-01
影响因子：
1.5
作者：
Lee, J;Patterson, DJ
通讯作者：
Patterson, DJ
DOI：
10.1115/1.3254824
发表时间：
1980-01-01
期刊：
JOURNAL OF MECHANICAL DESIGN-TRANSACTIONS OF THE ASME
影响因子：
--
作者：
NELSON, HD
通讯作者：
NELSON, HD
影响因子：
0.7
作者：
Siczek, Krzysztof;Stefanski, Andrzej
通讯作者：
Stefanski, Andrzej