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HE Ren, TONG Cheng-qian, HE Jian-qing, SHI Bing-liang. Analysis method of braking performance for multi-axle automobile[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 59-63. doi: 10.19818/j.cnki.1671-1637.2010.06.010
Citation: HE Ren, TONG Cheng-qian, HE Jian-qing, SHI Bing-liang. Analysis method of braking performance for multi-axle automobile[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 59-63. doi: 10.19818/j.cnki.1671-1637.2010.06.010
shu

Analysis method of braking performance for multi-axle automobile

doi: 10.19818/j.cnki.1671-1637.2010.06.010
  • 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

  • Received Date: 2010-06-25
  • Publish Date: 2010-12-25
    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.

     

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    • References(12)
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