Noise reduction structure of engine oil bottom shell

Abstract

The invention provides a noise reduction structure of an engine oil bottom shell. The noise reduction structure comprises an engine oil bottom shell, a resonance sound absorption board, and further comprises a high damping and vibration isolation rubber pad, wherein the resonance sound absorption board is arranged inside the side wall of the engine oil bottom shell; a plurality of through holes are formed in the resonance sound absorption board, and the holes in the resonance sound absorption board are circular; the high damping and vibration isolation rubber pad is arranged between the top end surface of the oil bottom shell and the connecting surface of a crankshaft box; the high damping and vibration isolation rubber pad comprises a first part, a second part and a third part; the section of the first part of the high damping and vibration isolation rubber pad and the section of the second part of the high damping and vibration isolation rubber pad are rectangular; and the section of the third part of the high damping and vibration isolation rubber pad is trapezoidal. Compared with the prior art, the noise reduction structure is good in noise reduction effect and is low in manufacturing cost.

Description

technical field [0001] The invention relates to a noise reduction structure, in particular to a noise reduction structure of an engine oil pan. Background technique [0002] The internal combustion engine is composed of various parts and systems such as piston, connecting rod crank mechanism, gas distribution mechanism, body, intake and exhaust systems, and cooling fan. In the engine work engineering, the cylinder mainly completes a series of complex processes such as air intake, fuel injection in the cylinder, fuel combustion, and gas discharge after combustion, and finally converts the heat energy generated by fuel combustion into mechanical work. The generation of process-related component noise is also very complicated, and the overall engine noise is composed of component noise from various sound sources closely related to the above-mentioned process. [0003] Mechanical noise is another very important noise source in the engine. Generally, the mechanical noise in the ...

AI Technical Summary

Problems solved by technology

[0006] 1. The noise reduction effect is not good. Although there are many noise reduction solutions for the oil pan in the existing technology, the technical effect is not good. This may be due to the defects in the design ideas of these existing technologies, or it may be that The design of the specific structure is not fine enough;

[0007] 2. The cost of renovation is high, and the current solutions for noise reduction include reinforcing the inside of the oil pan and coating expensive damping materials outside the oil pan, etc.

Among them, the reinforcement scheme needs to redesign the casting mold, and the cost of producing thin-walled complex components is also very high, so the cost of modifying the oil pan has remained high for a long time

Although the vibration of the oil pan contributes a lot to the noise, it is well known that the oil pan itself does not play a vital role in the performance of the engine, that is, the modification of the oil pan is not very important. Greatly improved engine performance

However, the current car users are very concerned about the cost performance and power performance of the car. Therefore, it is inevitable that car manufacturers should not invest too much in the transformation of the oil pan. Therefore, the problem of high transformation cost still needs to be solved.

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