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Oil nozzle of diesel engine

A technology of fuel injectors and diesel engines, applied in mechanical equipment, engine components, machines/engines, etc., can solve serious problems, energy waste, oil dripping, etc., and achieve the effect of improving efficiency and reducing volume

Inactive Publication Date: 2012-03-28
CHANGZHOU SHENGFA BULB FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fuel injectors currently used on diesel engines generally include a valve body and a valve needle arranged in the needle valve body. The head of the needle valve needle is conical. A sealing cone, the middle annular gap is the same pressure chamber as the oil inlet passage, the lower part of the sealing cone is the pressure chamber associated with the nozzle, the pressure chamber is divided into an upper pressure chamber and a lower pressure chamber, because the volume of the pressure chamber is too large Large, so the phenomenon of oil dripping after injection is serious, resulting in energy waste

Method used

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  • Oil nozzle of diesel engine
  • Oil nozzle of diesel engine
  • Oil nozzle of diesel engine

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Embodiment Construction

[0012] Such as figure 1 , figure 2 As shown, a fuel injector for a diesel engine includes a needle valve body 1 and a needle valve 2 arranged in the needle valve body 1, wherein the needle valve body 1 includes a pressure chamber 1a, and the pressure chamber 1a is oval in shape, and on the front of the needle valve 2 A baffle 3 is provided in the pressure chamber 1a, and the baffle 3 divides the pressure chamber 1a into a lower pressure chamber and a pressure chamber cavity. The section of the head of the needle valve 2 is frustum-shaped, and a spherical Protrusion 2a, the lower pressure chamber communicates with the oil outlet passage of needle valve body 1.

[0013] Wherein, the ratio of the diameter of the frustum of the cone to the diameter of the spherical protrusion is 4:3.

[0014] Wherein, the surface of the separator 3 is rough and provided with evenly distributed pits 3a.

[0015] Wherein, the end of the needle valve body 1 is tapered.

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Abstract

The invention belongs to the field of diesel engines, and particularly relates to an oil nozzle of a diesel engine. The oil nozzle comprises a needle valve body and a needle valve arranged in the needle valve body, wherein the needle valve body comprises a pressure chamber; the pressure chamber has an elliptical shape; a partition plate is arranged in the pressure chamber on the front side of theneedle valve; the pressure chamber is divided into a lower pressure chamber and a pressure chamber cavity by the partition plate; the section of the head part of the needle valve has a frustum shape;the frustum is provided with a spherical bulge; and the lower pressure chamber is communicated with an oil outlet channel of the needle valve body. The oil nozzle of the diesel engine, provided by the invention, has the advantages that: as the pressure chamber is changed into an elliptical shape, the volume of the pressure chamber is reduced; the pressure chamber is separated by the partition plate, so that the space of the pressure chamber is further compressed, and the oil injection of the oil nozzle is more powerful; and moreover, due to the pits on the partition plate, the formed oil mistis more uniform, and the burning efficiency of diesel oil is improved.

Description

technical field [0001] The invention belongs to the field of diesel engines, in particular to a fuel injector for diesel engines. Background technique [0002] The fuel injectors currently used on diesel engines generally include a valve body and a valve needle arranged in the needle valve body. The head of the needle valve needle is conical. A sealing cone, the middle annular gap is the same pressure chamber as the oil inlet passage, the lower part of the sealing cone is the pressure chamber associated with the nozzle, the pressure chamber is divided into an upper pressure chamber and a lower pressure chamber, because the volume of the pressure chamber is too large Large, so the phenomenon of oil dripping after injection is serious, resulting in energy waste. Contents of the invention [0003] The problem to be solved by the invention is how to prevent the fuel injector from dripping oil and save energy. The invention provides the fuel injector for a diesel engine. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/10
Inventor 张顺
Owner CHANGZHOU SHENGFA BULB FACTORY
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