多轴汽车制动性能分析方法

何仁; 童成前; 何建清; 石秉良

doi:10.19818/j.cnki.1671-1637.2010.06.010

多轴汽车制动性能分析方法

doi: 10.19818/j.cnki.1671-1637.2010.06.010

1.
江苏大学汽车与交通工程学院, 江苏镇江 212013
2.
中国定远汽车试验场, 安徽定远 233210

基金项目:

总装备部科研计划项目 ZLA07042

详细信息

作者简介:
何仁(1962-), 男, 江苏南京人, 江苏大学教授, 工学博士, 从事汽车现代设计理论研究

中图分类号: U462.32
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- 被引次数: 0
出版历程
- 收稿日期: 2010-06-25
- 刊出日期: 2010-12-25

Analysis method of braking performance for multi-axle automobile

1.
School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
2.
China Dingyuan Automotive Proving Ground, Dingyuan 233210, Anhui, China

More Information

Author Bio:
HE Ren(1962-), male, professor, PhD, +86-511-88791872, heren1962@163.com

Article Text (Baidu Translation)

摘要

摘要: 分析了ECE制动法规对多轴汽车制动力分配的要求, 指出目前多轴汽车制动性能分析方法的不足, 提出了基于ECE制动法规的利用附着系数图示法。在同一坐标系中画出汽车各轴的利用附着系数曲线和ECE制动法规边界曲线, 通过分析各轴利用附着系数之间的位置关系及其与边界曲线之间的关系来研究汽车的制动性能。考虑到多轴汽车制动时轴荷转移较大的实际工况, 在计算车轮地面法向反力时, 采用簧上动载荷和簧下载荷分开计算模型。分析结果表明: 当利用附着系数为0.20~0.80时, 汽车具有较高的附着利用率; 当制动强度为0.15~0.30时, 车轮抱死顺序为前、中、后, 符合车轮抱死顺序要求, 能够保证汽车制动时的方向稳定性。可见, 该分析方法简单、实用。
- 汽车工程 /
- 多轴汽车 /
- 制动力分配 /
- 利用附着系数 /
- ECE制动法规
Abstract: According to ECE brabing regulation, the requirements of braking force distribution of multi-axle automobile were analyzed, the defects of analysis methods on the braking performance of multi-axle automobile were pointed out, and a method named adhesion utilization coefficient diagram was proposed. The adhesion utilization curves of all axles and the boundary curves requested by ECE braking regulation were painted in the same coordinate system, the relationships among the adhesion utilization coefficients and the boundary curves, and the braking performance of automobile were studied. Because the transfer of multi-axle automobile' vertical axle loads was larger when braking, when calculating the normal reaction forces from ground to wheels, a model was adopted, in which the loads on and below suspension were calculated separately. An example was cited to illustrate the application of the analysis method. The result indicates that when adhesion utilization coefficient is from 0.20 to 0.80, automobile has a high adhesion utilization efficiency. When braking strength is from 0.15 to 0.30, wheel lock sequence is front, middle and rear, which accords with wheel lock requirements, and the directional stability of automobile is guaranteed when braking. Obviously, the method is simple, practical and beneficial.
- automobile engineering /
- multi-axle automobile /
- braking force distribution /
- adhesion utilization coefficient /
- ECE braking regulation

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图 1 制动法规要求

Figure 1. Demand of braking regulation

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图 2 受力分析

Figure 2. Force analysis

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图 3 利用附着系数曲线

Figure 3. Curves of adhesion utilization coefficients

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表 1 整车参数

Table 1. Vehicle parameters

参数	空载	满载
汽车总质量/kg	9 600	14 600
悬挂质心离前轴距离/mm	1 807	2 601
悬挂质心高度/mm	1 163	1 353
非悬挂质量/kg	前轴为920, 中轴为900, 后轴为900
制动力分配系数	β₁为0.546, β₂为0.273, β₃为0.181

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