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汽车安全与节能学报

JASE ›› 2016, Vol. 07 ›› Issue (04): 433-441.DOI: 10.3969/j.issn.1674-8484.2016.04.012

• 汽车节能与环保 • 上一篇    下一篇

重型车变速器传动效率的规律及评价方法

陈德鑫，石兴磊，杨启，陈曦   

  1. 中国第一汽车股份有限公司 技术中心，长春 130011， 中国
  • 收稿日期:2016-06-21 出版日期:2016-12-25 发布日期:2016-12-28
  • 作者简介:陈德鑫（1982—），男（汉），天津，高级工程师。E-mail: chendexin@rdc.faw.com.cn

Rule and evaluation method of transmission efficiency for heavy vehicle

CHEN Dexin, SHI Xinglei, YANG Qi, CHEN Xi   

  1. China First Automobile Works Limited Corporation, R&D Center, Changchun 130011, China
  • Received:2016-06-21 Online:2016-12-25 Published:2016-12-28

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摘要：

变速器作为整车动力总成的重要组成部分，其传动效率的高低直接影响着整车燃油经济性能。为对重型车变速器传动效率进行准确、合理的评价，本文基于大量传动效率的试验数据，使用数据拟合的方法，分析了扭矩、转速及速比对传动效率的影响趋势及拟合系数的统计规律，探讨了拟合系数与理论数学模型的联系，阐述了使用最大扭矩点进行效率评价的意义和不足，使用加权的概念对综合效率进行了重新定义。通过相关分析手段，提出了常用工况点效率评价方法，得到了重型牵引车的常用工况效率评价点，并说明了直接档变速器的优势。

关键词: 重型车辆, 变速器, 传动效率, 评价方法, 加权, 相关性

Abstract:

The transmission is an important part of the power train system. Its efficiency level directly affects the vehicle fuel economy. The influence of the torque, speed and ratio and the statistical rule of fitting coefficient were revealed by using the method of data fitting based on the test data obtained from a lot of tests carried out to appraise the efficiency of heavy vehicle mechanical transmission accurately and rationally. The relation between fitting coefficients and theoretical model was discussed, and the significance and deficiency of maximum torque point efficiency were expounded. A new definition of the comprehensive efficiency was reated by using weighting coefficient. Through correlation analysis, an evaluation method of common operating point was proposed, the common operating point of heavy tractor was obtained, and the advantage of direct transmission was explained.

Key words: heavy vehicles, transmission, transmission efficiency, evaluation method, weighting, correlation