汽车驾驶性的提高是汽车品质提升的一个关键因素，间隙是传动系统中必然存在且对驾驶性存在影响的因素，所以研究间隙对驾驶性的影响规律是非常有必要的。通过建立车辆纵向的低频动力学模型仿真典型驾驶性恶劣工况——Tip-in工况来研究间隙对驾驶性的影响规律。包括不同位置和不同大小的间隙对驾驶性的影响，分析在面向控制的建模时对模型的简化需要注意的问题。进一步的研究了当车辆传动系统存在较大间隙时，采用经典的转矩斜率控制的方法来改善驾驶性时出现的问题。并针对这一问题设计了基于冲击最小的闭环控制器，使汽车驾驶性得到了改善。
Abstract
The improvement of drivability is a key factor to enhance the quality of a car. The gap is an inevitable factor in driveline which has influence on drivability. So it is necessary to study the influence of the gap on drivability. By setting up a low-frequency longitudinal vehicle dynamics model to simulate the tip-in drive condition which has bad drivability, the influence of gap on the car's drivability was studied. It included the impact of clearance gaps at different locations and different gap size on drivability. And it got some useful rules to control-oriented modeling. Further studies of the problem when the vehicle there is a big gap and using the methods of classical ‘torque slope control’ to improve drivability. In order to solve this problem, a closed-loop controller was designed and the car’s drivability was improved.
关键词
传动间隙 /
汽车驾驶性 /
间隙的位置 /
间隙的大小 /
驾驶性控制
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Key words
driveline gap /
vehicle drivability /
position of the gap /
size of the gap /
drivability control;
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