对客车行驶时发动机制动的下坡能力进行了试验和理论分析，结果表明客车下坡行驶时通过发动机制动可以在部分坡度的坡道上满足汽车正常行驶的要求。

The experiment and theory analysis on the ability were carried out, the results show that it can meet the demands for bus to travel on some sloping hillside by engine braking.

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分析结果表明：减震器支架在车辆行驶过程中对纵梁的冲击导致了纵梁的开裂。

The analysis showed that it was the impact force of shock absorber that resulted in the fracture of side rail.

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由聚类分析的结果，根据相关系数理论从每一类片段中提取代表性片段来构建典型行驶工况。

Based on the results of cluster analysis and the correlation coefficient theory, some representive microtrips were extracted from each type of microtrips to construct a typical driving cycle.

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