Chinese Journal of Mechanical Engineering >

2019 , Vol. 32 >Issue 2: 23 - 23

DOI: https://doi.org/10.1186/s10033-019-0335-9

Advanced transportation equipment

Lubrication Performance of Connecting-Rod and Main Bearing in Diferent Engine Operating Conditions

  • Jun Sun ,
  • Biao Li ,
  • Shaoyu Zhu ,
  • Enming Miao ,
  • Hu Wang ,
  • Xiaoyong Zhao ,
  • Qin Teng
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  • 1. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei 230009, China;
    2. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;
    3. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China

收稿日期: 2017-08-07

  网络出版日期: 2019-07-19

基金资助

Supported by Science Fund of State Key Laboratory of Engine Reliability of China (Grant No. skler-201708) and National Natural Science Foundation of China (Grant No. 51490660/51490661)

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Lubrication Performance of Connecting-Rod and Main Bearing in Diferent Engine Operating Conditions

  • Jun Sun ,
  • Biao Li ,
  • Shaoyu Zhu ,
  • Enming Miao ,
  • Hu Wang ,
  • Xiaoyong Zhao ,
  • Qin Teng
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  • 1. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei 230009, China;
    2. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;
    3. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China

Received date: 2017-08-07

  Online published: 2019-07-19

Supported by

Supported by Science Fund of State Key Laboratory of Engine Reliability of China (Grant No. skler-201708) and National Natural Science Foundation of China (Grant No. 51490660/51490661)

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摘要

Only the lubrication performance at rated engine operating condition was generally analyzed in current design and research of engine connecting-rod and main bearing. However, the actual engine (especially vehicle engine) does not always operate in rated operating condition and its operating condition changes constantly. In this paper, a four-stroke four-cylinder engine is taken as the studying object, the load and lubrication of connecting-rod and main bearing in different operating conditions are analyzed. The load of connecting-rod bearing is calculated by the dynamic calculation method, the loads of all main bearings are calculated by the whole crankshaft beam-element finite element method, and the lubrication performance of connecting-rod and main bearings are analyzed by the dynamic method. The results show that there are major differences in the changes and numerical value at corresponding moment of the loads and lubrication performance of connecting-rod and main bearings in an engine operating cycle in different engine operating conditions; the most unfavorable case of the lubrication performance of connecting-rod and main bearings may not take place in the rated engine operating condition. There are also major differences between the lubrication performance of connecting-rod bearing and that of main bearing and between the lubrication performances of main bearings one another. Therefore, it will not be reasonable that the lubrication performance of a certain connecting-rod bearing or main bearing is analyzed in the design of the engine bearing. It is necessary to analyze simultaneously the lubrication performances of all bearings in different engine operating conditions.

关键词： Lubrication; Connecting-rod bearing; Main bearing, Engine; Operating condition

本文引用格式

Jun Sun , Biao Li , Shaoyu Zhu , Enming Miao , Hu Wang , Xiaoyong Zhao , Qin Teng . Lubrication Performance of Connecting-Rod and Main Bearing in Diferent Engine Operating Conditions[J]. Chinese Journal of Mechanical Engineering, 2019 , 32(2) : 23 -23 . DOI: 10.1186/s10033-019-0335-9

Abstract

Only the lubrication performance at rated engine operating condition was generally analyzed in current design and research of engine connecting-rod and main bearing. However, the actual engine (especially vehicle engine) does not always operate in rated operating condition and its operating condition changes constantly. In this paper, a four-stroke four-cylinder engine is taken as the studying object, the load and lubrication of connecting-rod and main bearing in different operating conditions are analyzed. The load of connecting-rod bearing is calculated by the dynamic calculation method, the loads of all main bearings are calculated by the whole crankshaft beam-element finite element method, and the lubrication performance of connecting-rod and main bearings are analyzed by the dynamic method. The results show that there are major differences in the changes and numerical value at corresponding moment of the loads and lubrication performance of connecting-rod and main bearings in an engine operating cycle in different engine operating conditions; the most unfavorable case of the lubrication performance of connecting-rod and main bearings may not take place in the rated engine operating condition. There are also major differences between the lubrication performance of connecting-rod bearing and that of main bearing and between the lubrication performances of main bearings one another. Therefore, it will not be reasonable that the lubrication performance of a certain connecting-rod bearing or main bearing is analyzed in the design of the engine bearing. It is necessary to analyze simultaneously the lubrication performances of all bearings in different engine operating conditions.

Key words： Lubrication; Connecting-rod bearing; Main bearing, Engine; Operating condition

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