Self-relieving non-return-oil oil atomizer and refitting method of same

A technology of self-relieving pressure and fuel injectors, which is applied to fuel injection devices, charging systems, machines/engines, etc. It can solve problems such as fuel leakage, reliability problems of drainage pipeline devices, etc., to reduce energy loss and simplify modification methods , Ease of use

Active Publication Date: 2014-03-19
CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-relieving pressure-free oil-return fuel injecto

Method used

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  • Self-relieving non-return-oil oil atomizer and refitting method of same
  • Self-relieving non-return-oil oil atomizer and refitting method of same
  • Self-relieving non-return-oil oil atomizer and refitting method of same

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Example Embodiment

[0039] The present invention includes a self-relieving pressure-free oil-return fuel injector and its refitting method. In order to better introduce the technical solution adopted in the present invention, firstly, a known traditional mechanical fuel injector is converted into a self-releasing pressure-free oil-return fuel injector. method, and then introduce a self-relieving pressure-free oil-return injector with a new structure directly formed by this technology in order to better understand the technical solution of the present invention.

[0040] A method for refitting a traditional mechanical fuel injector into a self-relieving pressure-free fuel injector.

[0041] supply:

[0042] like figure 1 The traditional mechanical injector 10 shown is one, including: injector body 12, spring washer 14, spring 16, spring seat 18, pressure plate 20, positioning pin (not shown), nozzle body 22, tight cap 24, needle valve 26; also provide figure 2 One each of a check valve...

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Abstract

The invention discloses a self-relieving non-return-oil oil atomizer which is formed by refitting a traditional mechanical oil atomizer. The self-relieving non-return-oil oil atomizer is characterized in that a tiny metering hole is arranged in the traditional mechanical oil atomizer, the tiny metering hole is communicated with a low-pressure oil return side spring cavity and a high-pressure working side oil containing groove; a valve is arranged and is a check valve, two sides of the check valve are provided with a low-pressure oil return side and a high-pressure working side respectively, and the tiny metering hole enables fuel oil to flow in the direction from the low-pressure oil return side to the high-pressure working side; a blocking plug is utilized to block an oil return opening matched with the valve to enable the tiny metering hole and the valve to have the one-direction flowing function. Or the self-relieving non-return-oil oil atomizer is directly formed according to the technical scheme, the mechanical oil atomizer has a non-return-oil function and can relieve pressure automatically, an oil return pipeline device is achieved, and the oil atomizer can stably and reliably operate.

Description

technical field [0001] The invention belongs to the technical field of fuel injection devices for diesel engines. In particular, it relates to a self-relieving pressure-free fuel injector and a method for refitting a traditional mechanical fuel injector into a self-relieving pressure-free fuel injector. Background technique [0002] P series mechanical injectors in fuel injection devices for medium and light diesel engines have been widely used due to their structural advantages, even in fuel supply systems using combined electronically controlled unit pumps that meet China 4 emission standards. fuel injector. [0003] With the improvement of national emission regulations, the fuel injection pressure is getting higher and higher to achieve better fuel-air mixing and combustion. But this also brings a huge challenge, that is, with the increase of injection pressure, the static and dynamic leakage between the injector parts will increase significantly; in addition, the use ...

Claims

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Application Information

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IPC IPC(8): F02M61/10
Inventor 王健黄俊夏少华陈希颖居钰生张庆
Owner CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST
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