Studies on Thermal Contraction of Crankshaft Bearings under Extreme Low Temperatures

• 作 者: Sever-Alexandru Haba Gheorghe Oancea
• 机 构: Manufacturing Engineering Department, Transilvania University of Brasov,
• 出 处: Journal of Thermal Science
• 发表日期: 2015年05期
• 关键词: Engine Engine block Crankshaft bearings Thermal contraction FEA

This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components have complex geometries and to obtain the thermal contractions, in the research, used the method of finite element analysis. The phenomena of thermal contractions are studied for the cold-start situations at extreme low temperature, knowing that the cold-start phase of an internal combustion engine is the main factor that determines moving rotational and translational parts wear life. Checking the proper choice of clearance is particularly important, as the use of inappropriate values of it leads to rapid operation destruction of the engine group components. The results obtained for the thermal clearances of crankshaft bearings are mathematically modeled and the relations can be used for calculating the clearances. The mathematical models are also useful for implementing in different software tools.

This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components have complex geometries and to obtain the thermal contractions, in the research, used the method of finite element analysis. The phenomena of thermal contractions are studied for the cold-start situations at extreme low temperature, knowing that the cold-start phase of an internal combustion engine is the main factor that determines moving rotational and translational part wear life . Checking the proper choice of clearance is particularly important, as the use of inappropriate values ​​of it leads to rapid operation destruction of the engine group components. The results obtained for crankinghaft of the thermal clearances of crankshaft bearings are mathematically modeled and the relations can be used for calculating the clearances. The mathematical models are also useful for implementing in different software tools.