Expansion tank mounting structure of hybrid electric vehicle

Abstract

The invention relates to the field of automobile power devices, and aims to provide an expansion tank mounting structure of a hybrid electric vehicle. The expansion tank mounting structure of the hybrid electric vehicle comprises an engine expansion tank, a PEU (power electronic unit) expansion tank and a fixing bracket, wherein one side end of the PEU expansion tank is opposite to the rear part of one side end of the engine expansion tank; engaging lugs connected through connecting bolts are arranged at the front end of the PEU expansion tank and the other side end of the engine expansion tank respectively; the fixing bracket comprises a bottom plate, a vertical plate and a reinforcing plate, and the bottom plate is provided with a bottom mounting hole and connected with the lower end of the engine expansion tank and the lower end of the PEU expansion tank; the upper end of the vertical plate is connected with the rear end of the PEU expansion tank through a screw; the reinforcing plate is connected with the rear end of the engine expansion tank through a screw. According to the expansion tank mounting structure of the hybrid electric vehicle, after the engine expansion tank and the PEU expansion tank are mounted, the modal testing character, strength and spatial arrangement can meet requirements, and the fixing effect is ideal.

Description

technical field [0001] The invention relates to the field of cooling of automobile power devices, in particular to an installation structure of an expansion tank of a hybrid electric automobile. Background technique [0002] The expansion tank is used in the system to buffer pressure fluctuations and part of the water supply. In the thermal system, it is mainly used to absorb the volume of the working medium due to temperature changes; The nitrogen in the tank is compressed. According to Boyle's gas law, the volume of the gas becomes smaller after being compressed and the pressure increases until the pressure of the gas in the expansion tank reaches the same pressure as the water. When the pressure of the gas in the expansion tank reaches the same level, the water is stopped; when the water is lost, the pressure is reduced and the pressure is reduced. The gas pressure in the tank is greater than the water pressure. At this time, the gas expands and squeezes out the water in ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an engine expansion tank in order to overcome the disadvantages that the engine expansion tank and the PEU expansion tank are respectively fixed by traditional fixing brackets, the modal test characteristics, strength and space layout cannot meet the requirements, and the fixing effect is not ideal. After installation with the PEU expansion tank, the modal test characteristics, strength and space layout can meet the requirements, and the installation structure of the hybrid vehicle expansion tank with ideal fixing effect

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