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Fuel injection nozzle

A technology of fuel injectors and fuel injection holes, which is applied in the field of fuel injection devices of internal combustion engine fuel systems, can solve problems such as fast response time, achieve full and perfect combustion, promote uniform mixing, and reduce fuel injection

Inactive Publication Date: 2007-06-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the main injection, the post-injection requires a fast response time, which is difficult to achieve even with some of the above-mentioned means including EFI

Method used

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  • Fuel injection nozzle
  • Fuel injection nozzle

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Embodiment Construction

[0019] In the embodiment shown in Figures 1, 2, 4, and 5, a fuel injection nozzle is composed of a needle valve body 1 and a needle valve 2, and two upper and lower rows of nozzles are arranged on the head of the needle valve body 1. The oil holes 1a, 1b, the needle valve 2 is provided with a longitudinal hole 2b whose lower end is open, the middle part of the needle valve 2 is provided with a transverse hole 2a communicating with the longitudinal hole 2b, and the needle valve body 1 and the needle valve 2 are provided with There is a conical sealing section 3. There are four oil guide grooves 1c on the inner cylindrical surface 4 on the upper part of the conical sealing surface 3a of the needle valve body 1; The angle B between the hole 1b and the center line is 75 degrees; the position of the four lower row of oil injection holes 1a on the inner cylindrical surface 4 is lower than the position of the four upper row of oil injection holes 1b on the inner cylindrical surface 4...

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Abstract

The present invention relates to a fuel nozzle capable of implementing multiple injection. It belongs to an injection device of fuel combustion system of internal combustion engine. Said fuel nozzle is characterized by that the lower end portion of needle valve of said fuel nozzle is equipped with a circumferential ring groove and on the internal cylindrical surface of said needle valve body a fuel guide groove is set. Said invention also provides the working principle of saod fuel nozzle, it can make the combustion of engine fuel and complete, and can improve noise and starting performance of internal combustion engine. Said fuel nozzle also can be used in direct injection ignited engine.

Description

technical field [0001] The invention relates to a fuel injection nozzle capable of multiple injections, which belongs to the fuel injection device of the fuel system of an internal combustion engine. Background technique [0002] At present, in order to improve the economy and emission indicators of the internal combustion engine, higher requirements are put forward for the fuel injection system of the internal combustion engine, and then there are dual injector injection, dual spring injectors, dual fuel injection pumps and electronically controlled injection, etc. A series of means and measures. However, the mechanical structure for adopting the above-mentioned fuel supply method is relatively complicated, which increases the manufacturing cost of the internal combustion engine more, which is not conducive to large-scale popularization and use. In compression-ignition internal combustion engines, pre-injection has been shown to improve engine noise and start-up performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/18F02M61/10F02M45/08
Inventor 隆武强杜宝国田江平冯立岩魏胜利冷先银
Owner DALIAN UNIV OF TECH