Constant-temperature low-noise oil sump tank of engine

Abstract

The invention discloses a constant-temperature low-noise oil sump of an engine. The main body of the oil sump is designed as the double-layer sandwich structure. The internal layer is made from the common steel plate while the external layer is made from the composite damping steel plate. The bottom of the main body of the oil sump is provided with an inlet pipe of cooling liquid and an electromagnetic valve. The upper end of the main body of the oil sump is provided with an outlet of cooling liquid while the lower end thereof is provided with a temperature sensor. Transmission lines are connected between the temperature sensor and the electromagnetic valve which are connected with a controller. The bottom of the main body of the oil sump is provided with a lubricant discharging outlet. The external side of the main body of the oil sump is pasted with damping rubber. The oil sump is characterized in that: the shell of the oil sump is modeled by the stamping of double-layer vibration-decreasing steel plates; the temperature of the oil sump shell is maintained within a certain range by the circulation of the cooling liquid in the sandwich structure; the damping performance decline of the damping steel plates, caused by the temperature rise of the lubricant of the engine, is eliminated so as to possibly increase noises; therefore the noise-reducing design is considered for the oil sump structure so as to achieve the purposes of decreasing vibration and reducing noise of the oil sump.

Description

technical field [0001] The invention belongs to internal combustion engine structural parts, in particular to a fuel tank bottom shell with constant temperature and low noise. Background technique [0002] Engine surface components include cylinder head, cylinder block-crankcase and several main casing parts (cylinder head cover, gear chamber cover, oil pan) and so on. Among them, the casing parts of the engine are the source of surface radiation noise. Such as figure 1 As shown, without acoustic optimization, the noise radiated from the oil pan accounts for about 35% of the noise of the whole machine when the speed is 3200r / min. More than half of the noise of the whole machine. Among the thin-walled parts of the engine, the oil pan is the most typical structure with the largest radiation surface, so the design of the oil pan is attached great importance at home and abroad. Optimizing the design of the thin-walled structure in the engine, especially for the oil pan, is a...

AI Technical Summary

Problems solved by technology

However, there are two disadvantages in the use of damping steel plates: one is that the heat dissipation performance of the oil pan made of damping steel plates is poor, resulting in high temperature of the lubricating oil, which affects the lubrication performance of the moving parts of the engine; The performance degradation leads to poor noise reduction effect, and even the situation where the noise does not decrease but rises

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