JPS62191655A - Supersonic fuel atomizing device - Google Patents

Abstract

PURPOSE:To accelerate the atomization of fuel with a simple structure and improve a burning property by forming a throttle valve which is provided in an inlet passage with a sheet metal valve and a piezo-electric plate which is tuck to one side of said sheet metal valve. CONSTITUTION:A throttle valve 2 is provided in an inlet pipe 1 and a fuel injection valve 3 is inserted in the upper course of the pipe 1 with its nozzle being directed to the valve 2 side. The end part of the inlet pipe 1 is connected to the inlet port 6 of a manifold 5 which is connected to plural combustion chambers. The throttle valve 2 is formed by sticking a disk-form piezo-electric element plate 11 to the bottom side of a disk-form sheet metal valve 10. An inserting pipe part 12 which extends in the radial direction is formed on the sheet metal valve 10, and a hollow support shaft 13 which is rotated interlocked with an accelerator pedal is fitted in the pipe part 12, and a lead wire of the piezo-electric element plate 11 is inserted into the support shaft 13 and guided to the outer part.

Description

Detailed description of the invention 3. gTIB explanation of the invention (for industrial use) related to conversion equipment.

<Prior art> An annular oscillator vibrated by an exciter is disposed in an intake passage connected to a combustion chamber of an internal combustion engine, dew-shaped fuel is injected from a fuel injection gob toward the annular oscillator, and the annular oscillator By,
Ultrasonic fuel redness devices that promote atomization of fuel are known as disclosed in Japanese Patent Application Laid-open No. 58-210354, Japanese Patent Publication No. 80-11224, and Japanese Patent Application Publication No. 60-810138.

This annular vibrator is vibrated in an extensional mode in the circumferential direction by an exciter, and radiates ultrasonic waves toward the inner side and the lower end surface of the vibrator, forming a platform in these areas. do. The particulate fuel injected by the fuel injection valve comes into contact with the annular vibrator to be vibrated, and passes through a sound field, thereby becoming further atomized and promoting its red coloring.

<Problems to be Solved by the Invention> By the way, in such a system using an annular vibrator, the mounting tends to become complicated.

An object of the present invention is to provide a fuel point forming device that can achieve atomization of fuel with a simple structure without using an annular vibrator.

Means for Solving Problems> The present invention uses a thin metal plate valve as a throttle valve disposed in an intake passage that is continuous with a combustion chamber of an internal combustion engine.

It consists of a pressure element plate attached to one surface of the element plate.

Function> The throttle valve has a bimorph structure by being composed of a plate valve on the metal 11 and a pressurized element plate attached to one side of the plate valve.

Therefore, by applying an alternating voltage approximately equal to the resonance frequency of the throttle valve to the piezoelectric element plate, the thin metal plate vibrates.
The fuel injected from the throttle valve adheres to the throttle valve and can be effectively degraded.

<Example> An embodiment of the present invention will be described with reference to accompanying drawings.

Reference numeral 1 denotes an intake pipe constituting a part of the intake passage, which communicates with an air cleaner (not shown). A throttle valve t2 is inserted into the intake pipe 1, and further upstream of the throttle valve t2, a fuel injection valve 3 is inserted with its nozzle facing the throttle valve 2 side. The end of the intake pipe 1 communicates with an intake port 6 of a manifold 5 that communicates with a plurality of combustion chambers.

Next, the configuration of the throttle valve 2 according to the present invention will be explained.

As shown in FIG. 2.3, the throttle valve 2 has a basic structure in which a disk-shaped piezoelectric plate 11 is adhered to the surface of a disk-shaped metal thin plate valve lO. The metal AM
The plate valve 10 is formed with a tube portion 12 extending radially through the center of the plate valve 10 .

A support shaft 13 passing through the intake pipe 1 is inserted therethrough. The support shaft 13 is connected to a known mechanism outside the intake pipe 1 that rotates in relation to the accelerator pedal, and as the shaft rotates, it causes the metal ill plate valve IO to swing. Further, on the two sides of the piezoelectric terminal plate 11, there are electrodes 14a and 1, respectively.
4b is formed, and the thin metal plate is attached to the thin metal valve 10 with the upper surface electrode 14a in contact with the lower surface of the thin metal plate valve 10. The support shaft 13 is formed with an energizing hole 15 along the longitudinal direction at the contact portion with the piezoelectric element plate 11.
A lead wire 16a inserted through the inside of the electrode 3 is connected to the upper surface electrode 14a. Further, a connecting portion 17 extending from the outer surface of the piezoelectric element plate 11 to the upper surface edge of the thin metal plate valve 10 is provided on the lower surface electrode 14b, and a lead wire 16b inserted through the support shaft 13 is connected to the connecting portion 17. is connected to. At this time, the connecting portion 17 needs to be in non-contact with the support +h13. The upper surface electrode 14a may be electrically connected to the outside through the support shaft 13 itself by being connected to the thin metal valve 10.

Roughly, an insulating coating 18 is applied to the piezoelectric element plate 11 from the lower surface of the fully bent thin plate plate plO, and the upper surface electrode 14a,
The lower surface electrode 14b is prevented from short-circuiting, and the current-carrying hole 15 is sealed. still.

Since fuel for internal combustion engines has insulating properties, the electrode 14 is not necessarily
Although insulation between the electrodes 14b is not necessary, it is desirable to insulate the piezoelectric element plate 11 in order to prevent short circuits caused by various components in the fuel Fj.

The electrodes 14a and 14b can be insulated not only by forming the insulation coating 8 as described above, but also by covering the entire throttle jt2 with a heat shrink tube and performing post-treatment.

The throttle valve 2 having the above configuration is disposed within the intake pipe 1, and when the internal combustion engine is started, the throttle valve 2 is configured to generate electricity. J1i14a, 14b
An alternating voltage having a frequency that substantially matches the resonance frequency of the throttle valve 2 is applied to the piezoelectric 7 (triple plate 11) through the piezoelectric 7 (triple plate 11).

As a result, (1) the metal thin plate valve 10 vibrates around the supported part by the supporting shaft 13, and a sound field is generated around it, and the atomized fuel attached to the metal thin plate valve 10 is The fuel is further atomized and atomized by the action of the thin metal valve 10, and then supplied from the manifold 5 into each combustion chamber.

<Effect of the invention> As mentioned above, the final part 1 and 1 is pressure? By vibrating the thin metal valve 10 under the action of the Ti element plate 11, the throttle valve 2 has a scenting function, so the fuel can be atomized with a simple configuration, especially at the time of starting.
There are excellent effects such as good deterioration of fuel and good driving of the internal combustion engine.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal side view, FIG. 2 is an exploded perspective view of the throttle valve r2, and FIG. 3 is a cross-sectional side view of the throttle valve 2. 1; Inhalation? i? 2. Nulottle valve 3; fuel injection valve 5
;? = 10-Ay do 10; metal ItA plate jP 11;
Pressure'+h Bare r-plate 13; Support shaft 14a, 14b: 1
L pole 16a, 16b; Lead wire 18; Insulated wave y4 Applicant Kuchiki Tokushu Tokugyo Co., Ltd. Agent Patent attorney Mu Tao Matsuura Figure 1

Claims (1)

[Claims] An ultrasonic fuel atomizer characterized in that a throttle valve disposed in an intake passage continuous with a combustion chamber of an internal combustion engine is constituted by a thin metal plate valve and a piezoelectric element plate adhered to one surface of the valve.