High-pressure common-rail heavy machinery diesel atomizer for diesel engine

Abstract

The invention discloses a high-pressure common-rail heavy machinery diesel atomizer for a diesel engine. The diesel atomizer includes a diesel atomizer body, and the diesel atomizer body is internallyprovided with a central diesel channel hole and a first transition diesel channel hole; a diesel storage cavity is formed in the bottom of the central diesel channel hole, a first end of the first transition diesel channel hole is communicated with the diesel storage cavity, and a second end of the first transition diesel channel hole is flush with the bottom surface of the diesel atomizer body.The internal structure is optimized, the design is scientific and reasonable, processing and assembly technologies among all components and parts are substantially improved, and the performance of thediesel atomizer is also improved fundamentally.

Description

technical field [0001] The invention relates to the technical field of electronically controlled fuel injectors that provide fuel injection for large marine engines, locomotive engines and large generator sets in a diesel engine high pressure common rail system, in particular to a diesel engine high pressure common rail heavy mechanical electronically controlled fuel injector. Background technique [0002] At present, the heavy mechanical electronically controlled fuel injector in the diesel engine is slender and long, and the arrangement of the inlet and return oil passages is complicated, which causes the fuel injector to have a huge volume and heavy weight. [0003] First of all, most heavy-duty mechanical electronically controlled injectors have narrow oil inlets and small volumes, so that the fuel supply of the injection oil circuit and the control oil circuit after the injection of the injector is insufficient, and if it is not timely, it will inevitably cause a drop in...

AI Technical Summary

Problems solved by technology

[0002] At present, the heavy-duty mechanical electronically controlled fuel injectors in diesel engines are thin and long, and the arrangement of inlet and outlet oil passages is complicated, which results in huge volume and heavy weight of the fuel injectors

[0003] First of all, most heavy-duty mechanical electronically controlled fuel injectors have narrow oil inlet passages and small volumes, so that the injection oil circuit and control oil circuit fuel supply after the injector is injected is not sufficient, and if it is not timely, it will inevitably cause a drop in oil pressure.

[0004] Secondly, the piston rod that controls the opening and closing of the needle valve cooperates with the piston sleeve couple, and the guide and sealing surface are too long, which is not only unfavorable for processing, increases manufacturing costs, but also increases the probability of the couple getting stuck; the lower end of the piston rod is connected with the needle valve. The slender needle valve and the lengthy piston rod cause the needle valve to be overloaded, and the opening and closing of the needle valve will inevitably be delayed, which will affect the fuel injection performance

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