Influence of high-turbocharged on performance of main bearing in diesel engine

被引：0
作者：
Chen, Xin-Hong [1 ,2 ]
Zu, Bing-Feng [1 ,2 ]
Xu, Yu-Liang [1 ,2 ]
Wang, Zhen [1 ]
Yang, Yue-Bin [1 ]
机构：
[1] Internal Combustion Engine Research Institute, Tianjin University, Tianjin
[2] School of Mechanical Engineering, Tianjin University, Tianjin
来源：
Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering | 2015年 / 36卷 / 03期
关键词：
Elastohydrodynamic lubrication; High turbocharging; IC engine; Main bearing; Transient dynamic response;
D O I：
10.13949/j.cnki.nrjgc.2015.03.002
中图分类号：
学科分类号：
摘要：
For a high-turbocharged inline four-cylinder diesel engine, the elastohydrodynamic lubrication performance and transient structural dynamic response of main bearings in rated condition were investigated using finite element analysis and multi-body dynamic method based on a virtual engine module. The influence of high-turbocharged on performance of main bearings was evaluated by comparison with the main bearing in mid-turbocharged diesel engine. Active effects of increasing centrifugal force balance rate of individual crank on main bearing performance was discussed. Research shows that after increasing diesel engine power, minimum oil film thickness of all main bearings decreases, even lower than the tolerance values. No.4 and No.5 main bearings wear more seriously and max. friction loss increase individually by 87% and 133%. Oil film pressure mainly excites dynamic response of main bearings in the Z direction and under high-turbocharged condition the dynamic response amplitudes rise in all directions. After centrifugal force balance rate of individual crank increased to 50%, performance of all main bearings is improved and the structural dynamic response is also weakened. ©, 2015, Chinese Society for Internal Combustion Engines. All right reserved.
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页码：6 / 11
页数：5
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