近来,我们到部队进行车辆检查,一些驾修人员普遍反映,EQ6100发动机飞轮壳经常发生不同程度的断裂损坏。其位置一是固定起动机的螺孔处破裂;二是飞轮壳的上壁沿分型面断裂;三是沿飞轮壳与缸体后端面连接的螺孔边缘破裂。在道路条件较差...近来,我们到部队进行车辆检查,一些驾修人员普遍反映,EQ6100发动机飞轮壳经常发生不同程度的断裂损坏。其位置一是固定起动机的螺孔处破裂;二是飞轮壳的上壁沿分型面断裂;三是沿飞轮壳与缸体后端面连接的螺孔边缘破裂。在道路条件较差的边远山区地带尤为严重,有的新车才行驶7～8万 km 就断裂过两三次,有的大修后行驶1万 km 就断裂了。为此,我们对断裂原因进行了分析。1 动力因素1.1 在维修中,因零件装配调整不当。展开更多
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 h...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.展开更多
文摘近来,我们到部队进行车辆检查,一些驾修人员普遍反映,EQ6100发动机飞轮壳经常发生不同程度的断裂损坏。其位置一是固定起动机的螺孔处破裂;二是飞轮壳的上壁沿分型面断裂;三是沿飞轮壳与缸体后端面连接的螺孔边缘破裂。在道路条件较差的边远山区地带尤为严重,有的新车才行驶7～8万 km 就断裂过两三次,有的大修后行驶1万 km 就断裂了。为此,我们对断裂原因进行了分析。1 动力因素1.1 在维修中,因零件装配调整不当。
基金funds project PRO-DD (POS-CCE, O.2.2.1., ID 123, SMIS 2637, ctr. No 11/2009) for providing the infrastructure used in this work
文摘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.
