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Fuel injection valve

A fuel injection valve, fuel injection technology, applied in the direction of fuel injection device, special fuel injection device, charging system, etc., can solve problems such as promoting combustion fluctuations

Inactive Publication Date: 2013-11-13
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 injection method, the oil dilution caused by the collision of the sprayed fuel with the combustion chamber wall in the state of liquid droplets and the deterioration of the spray are promoted, thereby promoting combustion variation. The spray deterioration described above is caused by deposits formed around the nozzle holes of the injection valve due to liquid fuel

Method used

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  • Fuel injection valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 of the present invention will be described with reference to the drawings. figure 1 It is a diagram showing a configuration example of an engine system 1 equipped with a fuel injection valve 30 according to the present invention. In addition, in figure 1 Only a part of the structure of the engine 1000 is shown in the figure.

[0062] figure 1 The illustrated engine system 1 includes an engine 1000 as a power source, and an engine ECU (Electronic Control Unit: Electronic Control Unit) 10 for comprehensively controlling the operation of the engine 1000 . The engine system 1 includes a fuel injection valve 30 that injects fuel into the combustion chamber 11 of the engine 1000 . The engine ECU 10 has the function of a control unit. The engine ECU 10 is a computer including a CPU (Central Processing Unit: Central Processing Unit) for performing arithmetic processing, a ROM (Read Only Memory: Read Only Memory) for storing programs, etc., and a RAM (Random Acc...

Embodiment 2

[0088] Next, refer to Figure 9 to Figure 11 Example 2 will be described. Figure 9 It is an explanatory diagram showing enlarged the tip portion of the fuel injection valve 50 according to the second embodiment set in the valve closed state. Figure 10 This is an enlarged explanatory diagram showing the tip portion of the fuel injection valve 50 of the second embodiment in which the needle member 33 rises to expand the first gap portion 37 while maintaining the closed state of the injection hole 32 . Figure 11 It is an explanatory diagram showing enlarged the tip portion of the fuel injection valve 50 of the embodiment 2 set in the valve open state.

[0089] The difference between the fuel injection valve 50 of the second embodiment and the fuel injection valve 30 of the first embodiment is as follows. That is, the fuel injection valve 50 of the second embodiment includes a valve member 51 instead of the valve member 38 included in the fuel injection valve 30 . In additio...

Embodiment 3

[0094] Next, refer to Figure 12 The fuel injection valve 60 of the third embodiment will be described. Figure 12 This is an enlarged explanatory diagram showing the tip portion of the fuel injection valve of Example 3 in which the needle member 33 rises to expand the first clearance (suction chamber) 37 while maintaining the closed state of the injection hole 32 .

[0095] The points of difference between the fuel injection valve 60 of the third embodiment and the fuel injection valve 50 of the second embodiment are as follows. The fuel injection valve 60 is provided with an elastic member 61 instead of the elastic member 52 provided in the fuel injection valve 50 . Since the other structural elements of the fuel injection valve 60 are the same as those of the fuel injection valve 50, the same reference numerals are assigned to the common structural elements in the drawings, and detailed description thereof will be omitted.

[0096] The elastic member 52 is a coil-shaped s...

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PUM

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Abstract

A fuel injection valve includes: a nozzle body having a nozzle hole formed in a front edge portion thereof; a spiral flow path that gives a swirling component to a fuel which passes through the nozzle body toward the nozzle hole; and a pre-injection swirl flow generating unit that causes the fuel to flow through the spiral flow path before the nozzle hole is opened, wherein the pre-injection swirl flow generating means is communicated with the spiral flow path at a downstream side of the spiral flow path, and includes a suction chamber whose volume is expanded before the nozzle hole is opened.

Description

technical field [0001] The invention relates to a fuel injection valve. Background technique [0002] In recent years, regarding the internal combustion engine in order to reduce carbon dioxide (CO 2 ) and emission reductions have been extensively researched on supercharged lean burn, massive exhaust gas recirculation (EGR), and premixed self-ignition combustion. According to these studies, in order to maximize the reduction of carbon dioxide (CO 2 ) and the effect of reducing emissions, it is necessary to achieve a stable combustion state near the combustion limit. In addition, in the process of depletion of petroleum fuels, even various fuels such as biofuels are required to have robustness capable of burning stably. The most important points for obtaining such a stable combustion are the reduction of the ignition deviation of the mixture and the rapid combustion that burns up the fuel during the expansion stroke. [0003] In addition, in the fuel supply of the interna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18F02M45/08F02M61/10
CPCF02M61/162F02M61/163F02M2200/46
Inventor 小林辰夫小森啓介
Owner TOYOTA JIDOSHA KK