Oil transfer pump oil return structure

Abstract

The invention belongs to the technical field of automobile components, and provides an oil transfer pump oil return structure. The oil transfer pump oil return structure comprises an oil storage bucket and an oil return pipe and further comprises a three-way pipe. The oil storage bucket is fixed into a fuel tank. The three-way pipe comprises a first oil inlet communicated with the oil return pipe, an oil outlet communicated with the oil storage bucket and a second oil inlet communicated with the oil outlet. A jet pump is arranged between the first oil inlet and the oil outlet. The jet direction of the jet pump is towards the oil outlet. The first oil inlet is communicated with the oil outlet through the jet pump. The second oil inlet is provided with a pressure valve. The fuel tank is communicated with or isolated from the second oil inlet through the pressure valve. Due to the fact that the three-way pipe is additionally arranged and the jet pump is arranged inside the three-way pipe, negative pressure is formed through the drainage effect, the pressure valve can be switched on through the pressure difference formed between the two sides of the pressure valve, no fuel pressure outside the pressure valve needs to be overcome, the fuel flow utilization rate is improved, the oil return efficiency is improved, and the oil storage bucket can be more rapidly filled with fuel.

Description

technical field [0001] The invention belongs to the technical field of automobile parts, and in particular relates to an oil return structure of an oil delivery pump. Background technique [0002] Due to the different fuel supply required by the engine under different working conditions, in order to ensure the maximum fuel demand of the engine, the rated flow rate of the current fuel pump is designed to be excessive. When working, the excess fuel flows back through the oil return structure of the fuel pump. In the oil storage barrel of the oil pump, and through the drainage effect, the fuel oil outside the oil storage barrel is driven into the oil storage barrel to ensure that the oil storage barrel is full of oil. [0003] The existing oil pump oil return structure is as follows: Figure 1-Figure 2 As shown, the oil storage barrel 101 is fixed in the fuel tank, the oil return pipe 102 is arranged outside the oil storage barrel 101, one end is connected to the pressure regul...

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Problems solved by technology

[0004] Due to the structure of the injection valve 103 and the fuel passage 104 in the existing fuel pump oil return structure, the opening of the umbrella valve 106 needs to overcome the pressure of the fuel oil in the oil storage tank 101 on the umbrella valve 106, so the oil return is in the impact of the umbrella. When the valve is 106, the energy loss is large, the oil return efficiency is low, and the drainage effect is poor

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