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Fuel injection valve

A fuel injection valve and fuel technology, which can be used in fuel injection devices, charging systems, machines/engines, etc., to solve problems such as spray deterioration and fuel fluctuations

Inactive Publication Date: 2013-08-21
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by adopting the in-cylinder direct injection method, the dilution of the oil caused by the collision of the sprayed fuel with the combustion chamber wall while still in the state of liquid droplets, and the deposits around the injection hole of the injection valve caused by the liquid fuel Deterioration of the spray, which contributes to combustion variations

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1 of the present invention will be described with reference to the drawings. figure 1 It is a figure which shows a structural example of the engine system 1 equipped with the fuel injection valve 30 of this invention. In addition, in figure 1 Only a part of the structure of the engine 1000 is shown in FIG.

[0052] figure 1 The illustrated engine system 1 has an engine 1000 as a power source, and an engine ECU (Electronic Control Unit, electronic control unit) 10 that collectively controls the operation of the engine 1000 . Engine system 1 has fuel injection valve 30 that injects fuel into combustion chamber 11 of engine 1000 . The engine ECU 10 has the function of a control unit. The engine ECU 10 is equipped with a CPU (Central Processing Unit, Central Processing Unit) for performing calculation processing, a ROM (Read Only Memory, Read Only Memory) for storing programs, etc., a RAM (Random Access Memory, Random Access Memory) for storing data, etc., N...

Embodiment 2

[0078] Next, refer to Figure 7 Example 2 will be described. Figure 7 It is an explanatory diagram showing the tip portion of the fuel injection valve 50 according to the second embodiment. The basic structure of the fuel injection valve 50 is the same as that of the fuel injection valve 30 of the first embodiment. That is, the fuel injection valve 50 includes a nozzle body 51 , a needle 52 , an injection hole 53 and a seat 54 . In addition, a fuel introduction passage 56 is formed in the fuel injection valve 50 . In addition, the fuel injection valve 50 is also the same as the fuel injection valve 30 in that it includes the swirling flow generation portion 52 a and the spiral groove 52 b. The fuel injection valve 30 and the fuel injection valve 50 differ in the following points. That is, the shape of the turning speed increasing portion 55 is different from that of the turning speed increasing portion 35 . The inner peripheral wall surface of the rotation speed-up part ...

Embodiment 3

[0080] Next, refer to Figure 8 Example 3 will be described. Figure 8 It is an explanatory diagram showing the tip portion of the fuel injection valve 70 of the third embodiment. The basic structure of the fuel injection valve 70 is the same as that of the fuel injection valve 30 of the first embodiment. That is, the fuel injection valve 70 includes a nozzle body 71 , a needle 72 , an injection hole 73 and a seat 74 . In addition, a fuel introduction passage 76 is formed in the fuel injection valve 70 . In addition, the fuel injection valve 70 is also the same as the fuel injection valve 30 in that it includes the swirling flow generating portion 72 a and the spiral groove 72 b. The fuel injection valve 30 differs from the fuel injection valve 70 in the following points. That is, the shape of the turning speed increasing portion 75 is different from that of the turning speed increasing portion 35 . The inner peripheral wall surface of the rotation speed-up part 35 is as ...

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PUM

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Abstract

This fuel injection valve is provided with: a nozzle body to which a nozzle hole is provided at the tip; and a needle that is disposed slidably within the nozzle body, forms a fuel introduction path between the needle and the nozzle body, and is seated in a seat section within the nozzle body. The fuel injection valve is further provided with: a gyrating flow generation section that is provided upstream from the seat section and that imparts a flow gyrating with respect to the direction of sliding of the needle to the fuel introduced from the fuel introduction path; and a gyration speed increasing section that is provided downstream from the seat section and that supplies fuel to the nozzle hole while increasing the gyration speed of the gyrating flow generated at the gyrating flow generation section. As a result, an air column is formed by introducing burned gas from the nozzle hole, generating microbubbles in the fuel at the interface with the air column.

Description

technical field [0001] The invention relates to a fuel injection valve. Background technique [0002] In recent years, regarding internal combustion engines, in order to achieve CO 2 The reduction of fuel consumption and the reduction of emissions are being actively carried out in the research of supercharged lean burn, large amount of EGR and premixed auto-ignition combustion. According to these studies, in order to maximize the CO 2 The effect of reducing and reducing emissions requires a stable combustion state at a position closer to the combustion limit. In addition, in the process of depletion of petroleum fuels, it is necessary to have robustness that enables stable combustion even when various fuels such as biofuels are used. The most important factors for obtaining such stable combustion are to reduce the ignition deviation of the air-fuel mixture and to achieve rapid combustion that completely burns the fuel in the expansion stroke. [0003] In addition, when s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18
CPCF02M61/163F02M55/00
Inventor 小林辰夫
Owner TOYOTA JIDOSHA KK
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