Oil returning noise reduction pressure regulator assembly of electric fuel pump

Abstract

The invention discloses an oil returning noise reduction pressure regulator assembly of an electric fuel pump. The oil returning noise reduction pressure regulator assembly comprises a regulator base. A regulator installing cavity is formed in the middle portion of the regulator base. An oil inlet channel and an oil outlet channel are formed in the two sides of the regulator installing cavity correspondingly. A pressure regulator is arranged in the regulator installing cavity. The distance exists between an oil outlet in the top end of the pressure regulator and the top end of the regulator installing cavity. The lower end of the oil inlet channel communicates with a lower inlet of the pressure regulator. A through hole communicating with the oil outlet channel is formed in the top of the regulator installing cavity. A transverse spoiler is arranged in the part, above the pressure regulator, of the regulator installing cavity, a plurality of turbulent flow holes are distributed in the transverse spoiler, and the spoiler is located below the through holes. According to the oil returning noise reduction pressure regulator assembly, the oil spraying state of the oil outlet of the pressure regulator is changed to scattered jet flow from linear jet flow through the spoiler, and therefore jet flow noise and vibration are reduced, and the noise reduction effect is achieved. A turbulent flow device is convenient to install, low in cost and good in effect.

Description

technical field [0001] The invention relates to an electric fuel pump used in automobiles, in particular to an electric fuel pump oil return noise reduction pressure regulator assembly. Background technique [0002] Electric fuel pumps are mainly used to provide certain pressure fuel for automobile fuel injection systems. At present, there are various types of electric fuel pump assemblies at home and abroad. However, when all fuel pumps are running, when the fuel passes through the pipeline, oil pump, pressure regulating valve and various components, due to the change of pipeline, the change of flow rate and the collision between fuel and each side wall, there will be a lot of noise And vibration problems, thereby reducing the comfort of use. [0003] For example: when the electric fuel pump is in operation, the fuel oil returns to the pressure regulator through the oil return pipe, and then to the oil pool. The two sides of the regulator installation chamber 1a are the o...

AI Technical Summary

Problems solved by technology

However, when all fuel pumps are running, when the fuel passes through the pipeline, oil pump, pressure regulating valve and various components, due to the change of pipeline, the change of flow rate and the collision between fuel and each side wall, there will be a lot of noise and vibration problems, thereby reducing the comfort of use

[0003] For example: when the electric fuel pump is in operation, the fuel oil returns to the pressure regulator through the oil return pipe, and then to the oil pool. The two sides of the regulator installation chamber 1a are the oil inlet passage 1b and the oil outlet passage 1c respectively, the pressure regulator 3 is installed in the regulator installation chamber 1a, the oil injection port at the top of the pressure regulator 3 is connected with the regulator installation chamber 1a There is a distance between the top ends of the oil inlet passage 1b, the lower end of the oil inlet passage 1b communicates with the lower inlet of the pressure regulator 3, and the top of the regulator installation chamber 1a is provided with an oil outlet through hole that communicates with the oil outlet passage 1c, and the fuel oil passes through the oil pipe Enter the oil inlet channel, then pass through the pressure regulator, and spray out from the top outlet of the pressure regulator in a straight line, which is prone to jet noise and vibration, which affects comfort

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