JPH044849Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a mechanism for atomizing liquids, particularly fuels for internal combustion engines such as gasoline, using ultrasonic vibrations.

[Prior Art] In recent automobiles, gasoline is atomized in an atomization chamber using ultrasonic vibration, and the atomized gasoline is supplied into a cylinder.

[Problems to be solved by the invention] However, the amount of gasoline supplied to the atomization chamber varies depending on the driving condition of the vehicle, and therefore, when the amount of gasoline supplied is large, insufficient atomization may occur in the un-atomized state. A situation may occur in which the ultrasonic transducer stops moving due to an overload condition.

This invention was made to deal with the above situation, and by changing the frequency of the vibration generated by the ultrasonic vibration generator according to the amount of liquid, it is possible to always atomize the specified amount and prevent insufficient atomization of the liquid. The object is to provide a vibrating liquid atomization device.

[Means for solving the problem] In order to accomplish the above-mentioned purpose, this invention uses an ultrasonic vibration generator and a toric body that is ultrasonically vibrated by the ultrasonic vibration generator to atomize liquid. and a high frequency oscillator that drives the ultrasonic vibration generator at a frequency corresponding to the amount of liquid supplied.

[Operation and Effects of the Invention] According to the invention configured as described above, a high-frequency oscillator that drives the ultrasonic vibration generator at a frequency corresponding to the amount of liquid supplied is provided, so that insufficient atomization of the liquid is prevented. A constant atomization state is maintained at all times.

[Example] The specific configuration of the invented device will be explained below based on the example shown in the attached drawings.

FIG. 1 shows a device according to the first embodiment, which is roughly composed of an ultrasonic generator section A and an atomizing vibrator section B. The ultrasonic generator part A is mainly composed of a tapered cylindrical cone 1 made of a corrosion-resistant metal or the like, and has a piezoelectric effect on the end face on the thicker diameter side as the base, so to speak. Piezoelectric transducers 2 are stacked and used as an ultrasonic vibration generation source, and 3 and 4 are input terminals thereof, and these input terminals 3 and 4 are connected to a high frequency oscillator 300. This high frequency oscillator 300 is designed to generate two types of vibration frequencies that differ in magnitude depending on the amount of gasoline supplied into the atomization chamber. Reference numeral 301 is a sensor that confirms the amount of gasoline supplied by detecting the rotation angle of the throttle valve, etc. This sensor 301 detects the movable terminal of switch 302 when the amount of gasoline supplied into the atomization chamber is large. a is a high frequency oscillator 300
When the amount of gasoline is small, the movable terminal a is connected to the high frequency oscillator 300.
It is designed to switch to the small frequency generating terminal c.

In this case, when the movable terminal a and the large frequency generating terminal b are connected, the high frequency oscillator 300 has the vibrator B at four nodal points as shown in FIG. 1a.
When the movable terminal a and the small frequency generating terminal c are connected, the vibrator B is in the first b
As shown in the figure, it has a vibration mode with six nodes N.

Furthermore, in the device of the first embodiment, the changeover switch 30
2 is provided with another fixed terminal y (not shown), and when the movable terminal a is connected to this fixed terminal y, the vibrator B exhibits a vibration mode having eight nodes N as shown in FIG. 1c. It may be configured as follows.

Now, FIG. 2 shows a second embodiment device, and the high frequency oscillator 300 of this second embodiment device has a frequency of 4.
The movable terminal d of the switch 304 is set to switch to terminals e, f, g, and i corresponding to different frequencies depending on the amount of gasoline supplied into the atomization chamber. It's getting old.

Now, a fixing flange 9 is provided at the middle position in the longitudinal direction of the outer peripheral surface of the cone 1 mentioned above, for fitting and fixing the cone 1 into a mounting hole provided at its mounting location. There is. This flange 9
An inlet 1a for a liquid such as gasoline is provided on the outer circumferential surface from the base, and an outlet hole 1b is provided on the tapered tip surface of the cone 1. This entrance 1a
A hollow hole h is formed so as to communicate with the outlet hole 1b. A pipe communicating with a tank for storing gasoline is connected to this inlet 1a.

On the other hand, the main body of the atomizing vibrator portion B is an annular atomizing vibrator 5 made of a corrosion-resistant metal or the like.

Next, FIG. 3 shows an electronically controlled fuel supply system for an automobile engine using the vibration atomizer of the above embodiment.

In this figure 3, E is a car engine,
100 is an engine cylinder block, 101 is an intake pipe, 102 is an exhaust pipe, 103 is a distributor, 104 is a fuel injection chamber, 105 is a throttle valve, 106 is a filter, 110 is a fuel tank, and 111 is a gear pump. 112 is a fuel filter; 113 is a fuel supply valve; 114 is a fuel return pipe; 200
201 is a high-frequency oscillator 202 for giving ultrasonic vibration energy to the device 200 and an electronic circuit for automatically controlling engine combustion, which is equipped with a control circuit thereof; 203 is an air flow meter; 204 is a throttle position sensor, and 205 is an engine cooling water temperature sensor. The dimensions of the atomizing vibrator 5 of the present invention largely depend on the atomizing capacity, but when used in an automobile engine, the inner diameter of the intake pipe 101 is set to d.
It has been confirmed through experiments that the inner diameter D of the vibrator 5 should be approximately 90-110% of the value of d, which is approximately the inner diameter of the intake pipe 101, in order to obtain a desirable atomization state.

Next, the operation of the above-described embodiment will be explained. By setting the key switch of the engine E to the start position, the power supply system for the control circuit 201 and all the electric systems of the engine is established, and the fuel pump 11 is set to the start position.
1 is also driven. The control circuit 201 includes an air flow meter 203 and a throttle position sensor 204.
The optimal fuel supply timing and supply time (supply amount) are determined each time based on the input information from the water temperature sensor 205, etc., and the fuel supply valve is adjusted again based on the input information of this determination. 113 is opened only for a set time at a set time, and the high frequency oscillator 202 is
A high frequency current of 26 KHz is applied via input terminals 3 and 4 to a piezoelectric transducer 2 suitably incorporated in the device of the present invention.

When the fuel supply valve 113 is opened, fuel is supplied to the pipe 1.
15, enters the hole h made inside the cone 1, passes through the hole h, and connects the inner circumferential surface 5 from the end thereof.
diffuses into a. At this time, since the cone 1 of the ultrasonic generator portion A is vibrating at a predetermined frequency due to the input from the oscillator 202, the fuel is subjected to a severe vibration effect. Therefore, the fuel is atomized and scattered from the inner peripheral surface 5a of the vibrator 5 into the fuel injection chamber 104.

At this time, the frequency of the oscillator 5 changes according to the amount of fuel supplied into the fuel injection chamber 104, so that all the fuel is atomized without excess or deficiency, and even if there is a large amount of fuel, it remains in an un-atomized state. Of course, there will be no remaining problems, and the movement of the vibrator 5 will not stop due to overload.

Although the above embodiment describes the case where this atomization device is used in an automobile engine, it can also be used as an atomization device on the edge of various other internally twisted engines or to efficiently operate various combustion furnaces. It can also be considered to be extremely useful.

In addition, the ultrasonic wave generation mode, the shape and structure of the atomizing vibrator, and the means for coupling these two are not limited to the above embodiments, and the design may be changed as appropriate according to the actual situation of the industry that belongs to the technical field of this invention. However, the initial purpose of this idea can still be achieved.

In addition, in carrying out the specific implementation of the device of this embodiment related to this invention, the vibrator 5 does not necessarily have to be a perfect circle, but may have a rectangular shape such as an oval, a polygon, or a square. It has been said that the device may be made into any shape or structure that can be imagined, and various modifications may be made without departing from the gist of the invention.

[Brief explanation of drawings]

1 and 2 are vertical sectional views showing the main parts of the first embodiment of the device and the second embodiment of the device of this invention, and FIG. 3 is an electronic system of an automobile engine in which the device of this invention is incorporated. FIGS. 1a to 1c, which are system diagrams of the automatic combustion control device, are schematic diagrams showing the vibration mode of the vibrator B in the device of the first embodiment. In the figure, A... Ultrasonic vibration generator part, B... Vibrator part for atomization, 1... Main body (cone) of the vibration generator, 2... Piezoelectric transducer, 5... Vibrator for atomization. ,
300...High frequency oscillator.

Claims (1)

[Claims for Utility Model Registration] 1. An ultrasonic vibration generator, an annular body that is ultrasonically vibrated by the ultrasonic vibration generator to atomize liquid, and an ultrasonic vibration generator that controls the amount of liquid supplied. A vibrating liquid mist device equipped with a high-frequency oscillator driven at a corresponding frequency. 2. The vibrating liquid atomizer according to claim 1, wherein the high-frequency oscillator drives the ultrasonic vibration generator stepwise at a frequency corresponding to the amount of liquid supplied. .