如何减少汽车原地换挡时间而不增加汽车原地换挡的冲击与振动，该研究开展了基于半主动阻尼拉杆的汽车不同换挡时间的振动控制研究。首先，对发动机悬置和防扭拉杆主动端加速度试验值与理论值进行了对比分析，其误差小于20%，验证了十三自由度整车动力学模型的有效性；其次，通过对汽车原地快速换挡时的动态响应分析及实验测试可知，在悬置系统中添加半主动阻尼拉杆可以有效减小换挡时的冲击与振动。最后，通过理论和试验测试结合研究分析了汽车不同换挡时间的动态响应特性。研究结果表明，原地换挡产生的换挡冲击与振动主要通过变速箱悬置和防扭拉杆传递到车内，变速箱悬置对悬置系统阻尼的增加不敏感，发动机悬置对动力总成的振动不敏感。在悬置系统中添加半主动阻尼拉杆可以减少原地换挡时间，降低油耗。
关键词：原地换挡；换挡时间；冲击与振动；半主动阻尼拉杆；振动控制
Abstract
In this paper, the vibration control of vehicle with different shift time based on a semi-active hydraulic damping strut (HDS) is researched on how to reduce the shift time of vehicle in situ shift without increasing the shock and vibration of the vehicle. Firstly, the experimental and theoretical acceleration values of the active side of the engine mount and torque strut are compared and analyzed and the error is less than 20%, which verifies the effectiveness of the 13-DOFs vehicle dynamics model. Secondly, the semi-active HDS in the mounting system can effectively reduce the shock and vibration in the process of in situ shift quickly according to the dynamic response analysis and experimental test. Finally, the dynamic response characteristics of the vehicle with different shift time are analyzed by combining theory and test. The results showed that the shift shock and vibration caused by in-situ shift are mainly transmitted to the vehicle through the transmission mount and the torque strut. The transmission mount is insensitive to the increase of the damping of the mounting system, and the engine mount is insensitive to the vibration of the powertrain. The introduction of semi-active HDS in the powertrain mounting system can reduce the in-situ shift time and fuel consumption.
Key words：in situ shift; shift time; shock and vibration; semi-active hydraulic damping strut; vibration control
关键词
原地换挡 /
换挡时间 /
冲击与振动 /
半主动阻尼拉杆 /
振动控制
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Key words
in situ shift /
shift time /
shock and vibration /
semi-active hydraulic damping strut /
vibration control
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