Main bearing cap mounting structure of automobile engine

摘要

The present invention relates to a main bearing cap mounting structure of an automobile engine installed in a cylinder block of an automobile engine to effectively mount a main bearing cap (Main Bearing Cap) supporting the main bearing to the cylinder block. Since the main bearing cap 10 'and the cylinder block 20' are interviewed in the horizontal plane, and each of the fastening bolts 30 'is fastened in the vertical direction, the load according to the driving of the crankshaft is applied to the main bearing cap 10'. When the main bearing cap (10 ') is applied to both sides in the case of acting to cause a noise, as well as the deformation of the fastening bolt (30') or breakage of the main bearing cap (10 ') a lot. There was a problem that the bar, the fastening surface 21 is formed on the lower end of the cylinder block 20 as the inclined surface of the upper and lower down light, the inclined surface of the upper and lower down light corresponding to the fastening surface 21 on the upper end of the main bearing cap 10. to Forming surface (11), by fastening a pair of fastening bolts 30 in the vertical direction with the fastening surfaces (11, 21) from both sides of the lower end of the main bearing cap (10) both fastening bolts 30 are constant According to the present invention, it is possible to prevent the main bearing cap 10 or the fastening bolt 30 from being damaged by the load according to the drive of the crankshaft. In addition, it is possible to eliminate the noise due to the separation of the main bearing cap 10 to improve the reliability of the engine, it is possible to contribute significantly to the improvement of the ride comfort of the car.