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Fuel oil injector

An injector and fuel technology, which is applied to fuel injection devices, machines/engines, charging systems, etc., can solve the problems of high manufacturing cost, parts accuracy, and high assembly process requirements, and achieve easy assembly accuracy, ensure assembly accuracy, parts reduced effect

Active Publication Date: 2008-07-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many parts, and the precision of the parts is easy to affect the precision of the overall assembly. Therefore, the requirements for the precision of the parts and the assembly process are high, and the manufacturing cost is high.

Method used

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  • Fuel oil injector
  • Fuel oil injector
  • Fuel oil injector

Examples

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Effect test

Embodiment 1

[0022] Embodiment one: Figure 1-11 It is a general structure and configuration of a fuel injector 20 using the technical solution of the present invention, and this example is designed for a four-valve engine. like Figure 1 to Figure 4 As shown, it includes valve body assembly 40, ball valve assembly 30, coil assembly 50, filter cup assembly 60, valve seat 21, orifice plate 22, anti-carbon plate 23, support plate 24, adjustment sleeve 25, spring 26, seal Ring 27, protective sheet 28, injection molded housing 29. All the above-mentioned components and parts share a longitudinal axis 88 .

[0023] combine figure 1 , 2 , 3, the valve body assembly 40 includes an upper valve body 41 and a lower valve body 42, which are welded by laser. They are not only structural parts, but also important functional parts in the magnetic circuit, so they are all processed by materials with high magnetic permeability. made. The ball valve assembly 30 includes an iron core 31 and a valve ba...

Embodiment 2

[0035] Embodiment two: Figure 12 and Figure 13 Another embodiment of an orifice plate is disclosed. There are six nozzle holes on the nozzle hole plate, which are divided into two groups, namely the first group of nozzle holes (121, 122, 123) and the second group of nozzle holes (124, 125, 126). 216 is the plane where the centers of the two intake valve openings are located, and this plane is perpendicular to the axis 213 of the orifice plate. 217 and 218 are the center points of the first and second intake valve ports respectively. Points 231, 233, 235, 237, 239, and 241 are located on the plane 216, and 231, 233, and 235 are three points uniformly distributed on a circle centered on point 217; Three points evenly spaced on a circle. 230, 232, 234, 236, 238, 240 are six points uniformly distributed on the circumference of the bottom surface 214 of the orifice plate. 215 is the axis of six spray holes, which respectively pass through 230-231, 232-233, 234-235, 236-237, ...

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Abstract

There is disclosed an improved structure of a fuel injector, in which by removing the middle magnet resistor from the valve assembly and switching over to cutting the lower valve body producing the magnetic gap into a circular cylindrical surface or being finished into a thin-wall ring, a circular wall groove is formed to reduce the wall thickness and increase the magnetic resistance, so as to increase the magnetic flux density between the iron core and the bicyclic flat surface of the upper valve body. Because of removing the intermediate adapter, the iron core is welded with the ball valve directly.

Description

【Technical field】 [0001] The invention relates to a fuel injector of an electronically controlled fuel injection system. 【Background technique】 [0002] In order to improve the air charge coefficient of the engine, enhance the power, and reduce emissions, the four-valve structure is widely used in the engine, and the traditional single-hole fuel injector is gradually replaced by the multi-hole fuel injector. Injection fuel supply, but because the injected fuel cannot be partitioned, a large amount of fuel is sprayed on the partition wall between the two intake valve ports, which aggravates the wet wall effect, which makes the gas mix uneven and affects the power of the engine performance, economy and emission environmental protection. [0003] Existing fuel injectors include valve body components, ball valve components, coil components, filter cup assemblies, valve seats, orifice plates, guard plates, springs, adjustment sleeves and other components. The ball valve assembl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/04
Inventor 蔡晓斌
Owner BYD CO LTD
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