JPS6377566A - Ultrasonic vibration type liquid atomizer - Google Patents

Abstract

PURPOSE:To reduce the setting space in the radial direction of a pipe by holding a short-barreled ultrasonic vibration generating element in the pipe with an upstream elastic body fixed at the expanded part of the pipe and a downstream elastic body. CONSTITUTION:In the liq. atomizer 1 for atomizing a liq. to be injected into a pipe 7 and a pipe 8 respectively provided with expanded parts 75 and 85, the annular upstream elastic body 3 is fixed on the upstream inner wall of the expanded part 75, and the annular downstream elastic body 4 is fixed on the downstream inner wall of the expanded part 85. The short-barreled ultrasonic vibration generating element 2 is clamped between the upstream elastic body 3 and the downstream elastic body 4 and made freely expansible and contractible in the pipe. Namely, since an amplitude expanding phone is not provided, the setting space in the radial direction of the pipe can be reduced.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention relates to an ultrasonic vibration type liquid atomizer that atomizes or atomizes liquid, and is mainly used to atomize fuel supplied to the combustion chamber of an internal combustion engine. This invention relates to an ultrasonic vibration type liquid atomization device that atomizes or atomizes liquid.

[Prior Art] Conventionally, an ultrasonic vibration generating element installed outside the air-fuel mixture supply pipe (intake pipe) between the internal combustion engines of a vehicle has been used to generate intake air through an amplitude amplifying horn such as a cylindrical horn or an exponential horn. 2. Description of the Related Art There is a fuel mulching device that atomizes or atomizes fuel injected into an intake pipe by ultrasonically vibrating a vibration element provided in a pipe.

[Problems to be Solved by the Invention]However, the conventional fuel atomization device having the above structure is provided with an ultrasonic wave (turbulence generating element and an amplitude amplifying horn) outside the intake pipe, so There were problems with installation, such as the need for a large space.

The present invention aims to provide an ultrasonic vibrating liquid atomization device whose radial mounting reduces space.

[Means for Solving the Problems 1] The ultrasonic vibration type liquid atomization device of the present invention is a liquid atomization device that atomizes liquid injected into a pipe in which a bulge is formed by ultrasonic vibration. , an annular upstream elastic body attached to the upstream inner wall of the bulge, an annular downstream elastic body attached to the downstream inner wall of the bulge, the upstream elastic body and the downstream elastic (
Q method was adopted.

[Actions and Effects of the Invention] With the above configuration, the ultrasonic vibration type liquid atomization device of the present invention has the following effects:
It has the following actions and effects.

The short cylindrical ultrasonic vibration generator is held in the tube by an upstream elastic body and a downstream elastic body attached to the bulge of the tube, and there is no amplitude amplifying horn, so the tube Radial installation can reduce space.

[Example] An ultrasonic 11G fj type liquid exposure apparatus of the present invention will be described based on an example shown in the drawings.

FIG. 1 shows a fuel atomizer to which the ultrasonic vibration type liquid atomizer of the present invention is applied, which is attached to an intake pipe of an automobile gasoline engine.

1 is a fuel atomizer according to the ultrasonic vibration type liquid atomizer of the present invention, and the fuel atomizer 1 is a hollow cylindrical ultrasonic vibration atomizer.
An external element (hereinafter abbreviated as vibration generating element) 2, made of rubber, is integrally formed in this embodiment, and includes a downstream part 3 which is an annular upstream elastic body, and a downstream part which is a downstream elastic body. 4 and a cylindrical part 51, and a first intake pipe 7 and a second intake pipe 8 of an automobile gasoline engine 6. The vibration generating element 2, the boulder 5, the first intake pipe 7, and the second intake pipe 8 form an intake passage 9 that is arranged concentrically and has the same diameter.

The vibration generating element 2 is inserted into the bolt insertion hole 71 of the first intake pipe 7.
Attached flange portion 72 and bolt insertion hole 81 of second intake pipe 8
The attached flange portion 82 is connected to a plurality of nuts 91 and bolts 92.
By fastening with the holder 5, it is held between the upstream side part 3 and the downstream side part 4 of the holder 5 so as to be able to expand and contract in the radial and longitudinal directions. Further, a gap 52 is formed between the vibration generating element 2 and the cylindrical portion 51 of the holder 5.

The vibration generating element 2 includes a piezoelectric element 21 that is displaced when a voltage is applied, an outer electrode 22 provided on the outer periphery of the mold element 21, and an inner electrode 22 provided on the inner periphery of the piezoelectric element 21. The electrode 23, the outer electrode 22, and the inner electrode 23 are composed of a high-frequency generator (not shown) connected to the outer electrode 22 and the inner electrode 23 via lead wires 24, 25 soldered to the electrode 23, the outer electrode 22, and the inner electrode 23, respectively.

The upstream side portion 3 is attached to a bulging portion 75 formed in the first intake pipe 7 and formed of a radial inner wall portion 73 and a longitudinal inner wall portion 74. The downstream portion 4 is attached to a bulging portion 85 formed in the second intake pipe 8 and formed of a radial inner wall portion 83 and a longitudinal inner wall portion 84 . Shoot! The 111 generating element 2 and the holder 5 are mounted in an annular recess 93 surrounded by a radial inner wall 73.83 and a longitudinal inner wall 74.84.

The engine 6 has one fuel injection device 61 to a combustion chamber 62.
The intake boat 63 is connected to the second intake pipe 8, an intake valve 64, an exhaust boat 65, an intake valve 66, and a piston 67. 68 is a throttle valve.

The operation of the fuel atomization device of this embodiment will be explained.

In the fuel atomization device 1 of this embodiment, the vibration generating element 2 is
The bulging portion 15 of the intake pipe 7 and the bulging portion 85 of the second intake pipe 8
The upstream side part 3 and the downstream side part 4 held in the recess 93 between
, and a cylindrical portion 51, which is held in the first and second intake pipes 7.8 so as to be able to expand and contract in the radial direction and the longitudinal direction, and as in the conventional case, the side width expanding horn is Since the radial installation of the first and second intake pipes 7.8 requires less space than in the prior art.

Therefore, the fuel atomization device 1 becomes compact, and the bulging portion 75 between the first intake pipe 7 and the second intake pipe 8
．． Since the vibration generating element 2 and the holder 5 are held in a recess 93 surrounded by 1 to the first and second intake pipes 7.
Can be installed within 8. Furthermore, the vibration generating element 2,
The holder 5, the first intake pipe 7 and the second intake pipe 8 are
Since the intake passages 9 are arranged concentrically and have the same diameter, intake resistance can be reduced.

When the piston 67 of the engine 6 descends, the intake valve 6
4 opens, and the air filter (not shown) provided upstream of the first intake pipe 7, the first intake pipe 1 and the second intake pipe 8, which are the intake passages 9, and the intake boat 63 are opened. Air for fuel is drawn into the combustion chamber 62 through the combustion chamber 62 .

At this time, fuel (gasoline) is supplied from the fuel injection fJJ device 61.
is injected in the form of a mist, and this mist of gasoline mixes with the air flowing through the first intake pipe 7 and the second intake pipe 8 and flows into the combustion chamber 62.

Generally, some of the atomized gasoline injected by the fuel injection device 61 tries to liquefy when it collides with the side inner wall of the second intake pipe 8; It collides with the vibration generating element 2 before colliding with the vibration generating element 2. This collided gasoline is given a super-extension (expansion and contraction) vibration by high frequency by the piezoelectric element 21, so that it turns into fine particles in the form of mist and scatters again above the piezoelectric element 21. This atomized gasoline flows into the combustion chamber 62 along with the airflow flowing through the second intake pipe 8 .

Therefore, part of the gasoline to be liquefied can be atomized into atomized particles and supplied to the combustion chamber 62, thereby improving combustion efficiency.

In this embodiment, a gasoline engine is used as the internal combustion engine, but the present invention may be applied to other internal combustion engines such as a diesel engine or an alcohol engine.

In this embodiment, a structure in which the vibration generating element 2 and the holder 5 are sandwiched between the first intake pipe 7 and the second intake pipe 8 is adopted, but the first intake pipe 7 or the second intake pipe 8 Intake pipe 8
The holding frame may be attached to one of the intake pipes by providing a recess and sandwiching the holding frame between the wall of the recess and the tip wall of the other intake pipe.

In this example, a vibrating element holder in which the upstream elastic body and the downstream elastic body are integrally formed is provided, but a vibrating element holder in which the upstream elastic body and the downstream elastic body are formed separately is provided. You can.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a fuel atomizer to which an embodiment of the ultrasonic 11 dynamic liquid atomizer of the present invention is applied, which is attached to the intake pipe of a Ganlin engine for a Japanese 8-car vehicle. .

Claims (1)

[Scope of Claims] 1) In a liquid atomization device that uses ultrasonic vibration to atomize liquid injected into a tube in which a bulge is formed, an annular upstream side attached to an upstream inner wall of the bulge. an elastic body, an annular downstream elastic body attached to the downstream inner wall of the bulging portion, and held between the upstream elastic body and the downstream elastic body so as to be expandable and contractible within the tube. 1. An ultrasonic vibration type liquid atomization device comprising a short cylindrical ultrasonic vibration generating element. 2) The ultrasonic vibration generating element, the upstream elastic body, and the downstream elastic body are arranged concentrically and form passages having the same diameter. Sonic vibration type liquid atomization device.