Negative-pressure structure easy for oil return of oil injector

Abstract

The invention discloses a negative-pressure structure easy for oil return of an oil injector, which is characterized in that the structure is composed of a negative-pressure structure body and a nozzle, the structure formed of the negative-pressure structure body and the nozzle enables a Venturi structure to be formed between the nozzle and the oil inlet channel of the oil tank; the retun oil of the oil injector can be extracted by means of the negative pressure brought about by the Venturi structure. The negative-pressure structure of the invention has the following beneficial effects: the efficiency for discharging residual oil in an oil injector assembly is effectively improved, and the oil injector assembly is ensured to be in a good working state, so as to improve the working condition of an engine.

Description

technical field [0001] The invention relates to a fuel oil return structure, in particular to a negative pressure structure for facilitating the oil return of a fuel injector. Background technique [0002] The fuel injector is a key part of the engine, and the working state of the fuel injector directly affects the working state of the engine; the existing fuel injector assembly is provided with an oil return passage for the fuel injector to return oil. Only when the returned oil is discharged through the oil return channel in time can the fuel injector reach the best working condition; the oil return structure of the prior art completely relies on the residual pressure and gravity in the injector to discharge, and the oil that needs to be discharged It mainly comes from the internal leakage of the fuel injector and the oil return during the fuel injection operation, which is extremely unstable, and the impact of the interception of the diameter of the oil return pip...

AI Technical Summary

Problems solved by technology

[0002] The fuel injector is a key part of the engine, and the working state of the fuel injector directly affects the working state of the engine; the existing fuel injector assembly is provided with an oil return passage for the fuel injector to return oil. Only when the returned oil is discharged through the oil return channel in time can the fuel injector reach the best working condition; the oil return structure of the prior art completely relies on the residual pressure and gravity in the injector to discharge, and the oil that needs to be discharged It mainly comes from the internal leakage of the fuel injector and the oil return during the fuel injection operation, which is extremely unstable, and the impact of the interception of the diameter of the oil return pipe

Therefore, it is easy to generate high oil return pressure in the oil return pipe of the injector, which has a great influence on the normal operation of the injector.

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