JPS61268862A - Supersonic-wave fuel pulverizing apparatus - Google Patents

Abstract

PURPOSE:To firmly connect a horn and a plate-shaped member by inserting the plate-shaped member having plural stripes of grooves on the inner wall surface of an insertion hole, into a prescribed position of the horn, and allowing the outer peripheral part of the plate-shaped member insertion part of the horn to be engaged with each groove through plastic deformation. CONSTITUTION:The high-frequency voltage generated by a high-frequency oscillator 1 is introduced into the positive and negative electrodes 3 and 4 insulated by a glomet 5 made of insulating material, passing through a lead wire 2, and applies a high-frequency voltage onto the electric strain elements 7 installed between the positive and negative electrodes 3 and 4 and between a horn 6 and the positive electrode 3. Then, the electric strain element 7 shifts in proportion to the electric power in the axial direction, and said shift is amplified by the horn 6, and transmitted to a ring-shaped member 12, which is vibrated to pulverize fuel. In this case, after the horn 6 is inserted into an insertion hole having plural stripes of V-shaped grooves 15 on the inner wall surface of a flange 13, the horn 6 is plastically deformed by pressing the A-part by a pressing metal fitting, and engaged into each V-shaped groove 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an ultrasonic fuel atomization device, and more particularly, to an ultrasonic fuel atomization device that injects fuel from a fuel supply device that supplies fuel to an internal combustion engine via a throttle body that forms a ventilation flow path. The present invention relates to an ultrasonic fuel atomizer having a structure suitable for being fixed to a throttle body that atomizes the atomized fuel.

[Background of the invention]

Conventional ultrasonic fuel atomization devices are, for example, equity.

As shown in Publication No. 55-23674, the flange is integral with the horn. It has been difficult to manufacture the horn, and the cost has tended to be high. Therefore,
There was a request to make the 7 lunges separate, but the current situation is that this has not been possible due to strength and structure considerations.

That is, for example.

Welding methods such as brazing are extremely unreliable when the horn is made of duralumin, and the conventional caulking method has insufficient strength against vibrations. This was developed in view of the above, and its purpose is to provide an ultrasonic fuel atomization device in which the horn and seven flange are separate members, and in which both members are firmly connected. It is in.

[Summary of the invention]

A feature of the present invention is that the horn has an electrostrictive element crimped thereon, which transmits high-frequency vibrations to a ring-shaped part arranged so that the fuel ejected from the fuel supply device collides with the side wall. A plate-shaped member having a plurality of grooves is inserted into the inner wall surface of the insertion hole near the position where the vibration becomes zero, and the outer circumference of the plate-shaped member insertion portion of the horn is plastically deformed with a press fitting to form the six grooves. The present invention has a structure in which the plate-shaped member is fixed to the horn after being filled, and the plate-shaped member is fixed to a throttle body that forms a ventilation passage for supplying fuel to the internal combustion engine. .

[Embodiments of the invention]

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 3.

FIG. 1 is a longitudinal sectional view showing an embodiment of the ultrasonic fuel atomization device of the present invention. In FIG. 1, a high frequency voltage (7!jIl sound wave) generated by a high frequency oscillator 1 is guided to a + electrode 3 and a − electrode 4 by a lead wire 2. The 10′#L pole 3 and the one electrode 4 are connected to a grommet 5 formed of an insulating material.
A high frequency voltage is applied to the electrostrictive element 7 which is insulated between the + electrode 3, the four electrodes, and the horn 6 and the electrode 3.

FIG. 2 is a longitudinal cross-sectional view showing one embodiment of the strain element 7 shown in FIG. 1, which has a circular cross section rM and has a silver electrode 8 coated on its outer periphery.

Referring again to FIG. 1, a bolt 9 is integrally attached to the central axis of the end of the horn 6 on the electrostrictive element 7 side. ten electrodes 3
．． - The electrode 4 and the spacer 11 are compressed and fixed to the hole 76.

When a high-frequency voltage is applied to the electrostrictive element 7, the electrostrictive element 7 is displaced in the axial direction in proportion to the electric power, and this displacement is amplified by the conical horn 6 and transmitted to the ring-shaped member 12, supplying fuel to the internal combustion engine. When the fuel ejected from the fuel supply device (not shown) provided for supplying the fuel collides with the side wall, it atomizes it.

13Fi7 lunge (plate-shaped member), 14 a cover.

FIG. 3 is a longitudinal sectional view showing an embodiment of the joint between the flange 13 and the horn 6 shown in FIG. 7. The flange 13 has an insertion hole into which the horn 6 is inserted, and a plurality of V-shaped grooves 15 are provided on the inner wall surface of the insertion hole to accommodate the electrostrictive element 7 of the horn 6.
The position where the amplitude of the ultrasonic vibration on the side becomes zero is inserted into the insertion part of the 7-flange 13, and the A part is pressed with a press fitting (not shown) to plastically deform the horn 6 and fill the 6-groove 15. Then, the flange 13 is firmly connected to the horn 6.

The cover 14 is compressed and fixed between the seven flange 13 and the brim of the horn 6 when the seven flange 13 is fixed to the horn 6, and serves to protect the legs and the electrostrictive element portion.

The ring-shaped member 12Fi has a unique resonant frequency due to its material and shape, and by applying vibration at that frequency from the horn 6, it resonates in a unique mode. This high-frequency vibration atomizes the fuel that collides with the inner wall surface of the ring. Note that the flange 13 is fixed to a throttle body (not shown) that forms a ventilation flow path to the internal combustion engine.

〔Effect of the invention〕

According to the present invention described above, the horn and the 7-lunge are separate members, and moreover, both members are firmly connected, so that the materials and man-hours can be reduced, and the 7-lunge can be fixed to the horn. At the same time, the cover that protects the electrostrictive element can be fixed at the same time, which has the effect of improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the ultrasonic fuel atomization device of the present invention, FIG. 2 is a longitudinal sectional view showing an embodiment of the electrostrictive element of FIG. 1, and FIG. It is a longitudinal cross-sectional view which shows one example of the joint part of the 7 langes of a figure, and a horn.

Claims (1)

[Claims] 1. A ring-shaped member arranged so that fuel ejected from a fuel supply device that supplies fuel to the internal combustion engine through a throttle body forming a ventilation flow path collides with a side wall, and high-frequency vibrations are transmitted to the ring-shaped member. In an ultrasonic fuel atomization device comprising a horn and an electrostrictive element crimped to an end of the horn opposite to the ring-shaped member, the amplitude of ultrasonic vibration on the electrostrictive element side of the horn is zero. A plate member having a plurality of grooves is inserted into the inner wall surface of the insertion hole near the position where An ultrasonic fuel atomization device characterized by having a structure in which the plate-like member is fixed to the horn, and the plate-like member is fixed to the throttle body by screwing.