Main bearing cover for IC engine

A technology for main bearing caps and internal combustion engines, applied to crankshaft bearings, etc., can solve problems such as insufficient main bearing cap rigidity, main bearing hole coaxiality and cylindricity, increased engine manufacturing costs, and many machining surfaces, etc., to achieve reduction The effect of machining surface, reducing manufacturing cost and improving production efficiency

Active Publication Date: 2010-02-10
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The rigidity of the main bearing cap and the coaxiality and cylindricity of the main bearing hole are not enough, and there are many machined surfaces, which increases the manufacturing cost of the engine

Method used

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  • Main bearing cover for IC engine
  • Main bearing cover for IC engine
  • Main bearing cover for IC engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 2-7 As shown, a main bearing cap of an internal combustion engine has a toothed structure in shape, and four arc-shaped connecting walls 1 connect five bearing caps 2 together, so that the bearing caps 2 are connected to each other to form a whole, and The arc-shaped connecting wall 1 is integrally formed with each of the bearing caps 2 .

[0030] The joints between the arc-shaped connecting wall 1 and the bearing cover part 2 are all reinforced with reinforcing ribs 5, so that the rigidity thereof is greatly improved.

[0031] Due to the use of the arc-shaped connecting portion, during the working process of the engine, the oil flowing down from the crankshaft will accumulate on this arc-shaped connecting wall 1, and cannot return to the oil pan in time, so that in each arc An oil drain hole 11 is made on the connecting wall to ensure that the machine oil can flow back into the oil pan quickly.

[0032] On the rear end of this main bearing cap, cast a...

Embodiment 2

[0040] The difference between this embodiment (not shown in the figure) and embodiment 1 is that there is only one above-mentioned arc-shaped connecting wall 1 , which connects the two bearing caps 2 together to form a whole. The structure of the rest of this embodiment can refer to Embodiment 1.

[0041] The main bearing cap described in this embodiment can be used in a single-cylinder engine.

[0042] In the above-mentioned embodiments, the connecting part can adopt any structural form according to actual needs, not limited to the arc-shaped connecting wall, the bolt through holes can also be processed by drilling, and other parts can also be changed according to needs.

[0043] It is obvious to those skilled in the art that the main bearing cap disclosed in the present invention can be used for in-line, V-type and opposed engines with any number of cylinders. Due to space limitations, the foregoing implementation manners are not described here one by one.

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PUM

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Abstract

The invention discloses a main bearing cap of gas engine, which makes use of connection to connect various bearing caps together so as to form the whole main bearing cap. In the whole main bearing capthe rigidity of main bearing seat of die-casting body is improved greatly. Mechanical deformation, thermal deformation and portrait vibration of body are decreased. The rigidity of main bearing cap,coaxiality and Cylindricity of the hole of main bearing are improved at a great extent so as to improve the pressure-bearing ability of bearing and decrease the abrasion of friction pair. In addition,back oil seal seat is cast on the main bearing cap and a boss is cast on the lower of main bearing cap to install filtering so as to decrease the parts number of gas engine, decrease mechanical machining faces, decrease the production cost and improve the production efficiency.

Description

technical field [0001] The invention relates to a main bearing cap of an internal combustion engine. Background technique [0002] The body of the internal combustion engine constitutes the skeleton of the machine, and all the main parts and accessories of the internal combustion engine are installed inside and outside the body. In order to ensure the reliability and durability of the main parts such as pistons, connecting rods, and crankshafts, their relative positions must be strictly maintained. The body bears very complex loads when the internal combustion engine is running: the gas pressure of the gas in each cylinder on the surface of the cylinder, the lateral force acting on the wall of each cylinder through the piston, the force on each main bearing through the crankshaft, and the support of the bracket to the internal combustion engine Reaction Force and Reaction Moment. The magnitude and direction of these forces are constantly changing with the operating conditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C9/02
Inventor 张传荣辛中杰
Owner BYD CO LTD
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