Main bearing of internal combustion engine

Abstract

In order to reduce the loss of pressure of lubricating oil flowing through a lubricating oil branch pipe, the curvature of the lubricating oil branch pipe is minimized, together with the length of the lubricating oil branch pipe. The central axis of a first oil passage (15), which penetrates a main bearing cap (9) in the thickness direction, and the central axis of a second oil passage (16), which penetrates a saddle base plate (12) in the thickness direction, intersect at 0 to 45 DEG , and the central axis at one end of a lubricating oil branch pipe (20), which is connected to the inlet of the second oil passage (16), and the central axis of the lubricating oil branch pipe (20), excluding the one end, intersect at 0 to 45 DEG . The lubricating oil branch pipe (20), excluding the one end, is configured so as to linearly extend along the width direction of the base plate.

Description

[0001] This application is a divisional application of an invention patent application with an application date of February 18, 2011, an application number of 201180007862.1, and an invention title of "main bearing of an internal combustion engine". technical field [0002] The present invention relates to a main bearing constituting, for example, a large diesel engine for ships and the like. Background technique [0003] As a main bearing constituting a large diesel engine for a ship or the like, for example, a bearing of Patent Document 1 is known. figure 1 Main bearings as disclosed. [0004] 【Prior technical literature】 [0005] 【Patent Literature】 [0006] [Patent Document 1]: Japanese Patent No. 2878128 [0007] However, the above-mentioned patent document 1 figure 1 The disclosed lubricating oil branch pipe for supplying lubricating oil to the main bearing 3 is bent at a right angle above the main bearing cap 4, and in order not to interfere with the crank arm of ...

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned patent document 1 figure 1 The disclosed lubricating oil branch pipe for supplying lubricating oil to the main bearing 3 is bent at a right angle above the main bearing cap 4, and in order not to interfere with the crank arm of the adjacent crankshaft, it needs to follow the center of the partition between the cylinders. Configure by way of divider

For this reason, the bending of the lubricating oil branch pipe increases, and the piping length (pipe length) of the lubricating oil branch pipe becomes longer, which has the problem that the pressure loss of the lubricating oil flowing in the lubricating oil branch pipe increases.

In addition, if the pipe length of the lubricating oil branch pipe becomes longer, there is a problem that the manufacturing cost of the internal combustion engine increases.

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