JPH09228897A - Gaseous fuel filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive decrease in number of component items, price reduction, facilitation of assembly and weight reduction in a gaseous fuel filter in which filter element and permanent magnets are used in parallel. SOLUTION: Gaseous fuel flows from an entrance passage 2 to an exit passage 5 after passing a cylindrical filter element 14 and magnetic field of permanent magentas 21 placed in its inner space 17. Plural permanent magnets 21 are mounted on a supporting rod 15 with their same polarity poles facing each other, constant intervals are maintained between them by means of mutual reaction force magnetic field is regularly formed across the approximately entire inner space 17 and fine iron rust powder is completely removed. The interval holding means of the permanent magnets 21 is considered their own reactional force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine using a gas fuel, and more particularly to a filter installed in a fuel supply system of an automobile engine.

[0002]

2. Description of the Related Art A fuel supply system for an engine that uses a gaseous fuel such as LPG and CNG, as shown schematically in FIG. 2, uses a high-pressure gaseous fuel filled in a cylinder 31 as a filter 33 and a solenoid valve. It is configured to be introduced into a regulator 35 via a fuel conduit 32 having 34, where it is depressurized to a predetermined pressure and sent from a fuel passage 36 to a mixer 37 installed in an intake pipe passage 38. The mixer 37 delivers the gaseous fuel corresponding to the flow rate of the air passing through the air cleaner 39 to the intake pipe 38 and supplies it to the engine 40.

The cylinder 31 is made of thick iron so as to withstand high pressure, and its inner surface is easily rusted by the moisture contained in the filled gaseous fuel.

When the iron rust is peeled off and mixed into the gaseous fuel, the fine particles may be sent to the engine 40 without being caught by the filter element of the filter 33 and may damage the piston ring or the like. It is also necessary to completely remove fine iron rust.

Therefore, as shown in FIG. 3, the filter 33 has a cup-shaped casing 44 attached to a main body 41 having an inlet passage 42 and an outlet passage 43 for gaseous fuel, and the casing 44 has a filter element 45 and a permanent magnet 46.
Are concentrically housed and the gaseous fuel entering from the inlet passage 42 is passed from the outer peripheral surface through the filter element 45, and then the magnetic field of the permanent magnet 46 therein is passed to pass through the outlet passage 4
It is configured such that the data is transmitted from the No. 3.

[0006]

The permanent magnets 46 form a magnetic field regularly in almost the entire inside of the filter element 45, and a plurality of them are spacers made of a non-magnetic material, which are spacers, so that the gaseous fuel can pass through without failure. And the support rods 48 installed alternately on the central axis.

The collar 47 does not cause the inconvenience that the permanent magnets 46 attract each other to make two or more permanent magnets into one permanent magnet, the magnetic field is biased and irregularly formed, and iron rust cannot be completely removed. This is used for this purpose, and a plurality of permanent magnets 46 are fitted and held on the support rod 48 at regular intervals.

Therefore, it is necessary to prepare the number of collars 47 that is one less than the number of permanent magnets 46.
As the number of 6's used increases, the number of collars 47 also increases, and the number of parts increases, which is disadvantageous in terms of price and parts management. In addition, the permanent magnet 46 and the collar 47
Since and are alternately fitted to the support rod 48, there is a problem that the assembling work is troublesome and the total weight is further increased.

According to the present invention, a plurality of permanent magnets are arranged on the inner central axis of the filter element so that a magnetic field is regularly formed in almost the whole of the filter element to remove magnetic powder such as fine iron rust. To solve the above-mentioned problems that filters have, that is, the number of parts is large due to the use of collars, which is disadvantageous in terms of price and parts management, that assembly work is troublesome, and the overall weight increases. To do.

[0010]

That is, the present invention eliminates the collar and arranges a plurality of permanent magnets so that the same magnetic poles face each other, and the intervals are maintained by the repulsive force of each other. In this way, by utilizing the repulsive force of the permanent magnet itself instead of the collar, it is advantageous in terms of price and parts management, and simplification of the assembling work and weight reduction of the whole are achieved.

When the filter of the present invention is applied to the fuel supply system of an automobile engine, it can be mounted on the vehicle body like an ordinary filter, but since the vibration acceleration of the automobile body is small, the permanent magnets dance and become unstable. There is no concern that it will become stable, and it maintains stable and constant intervals.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The filter according to the present invention may be installed alone in a fuel conduit 32 with reference to FIG. Installed.

Further, it is effective for removing impurities that the gaseous fuel flows into the filter element from almost the entire outer surface, passes through the filter element, and then flows out through the inner magnetic field to remove impurities. The passage has an annular inlet opening toward the outer circumference of the filter element,
The outlet passage is preferably open at one end inside the filter element. This passage structure is the same as the conventional product shown in FIG.

Further, the permanent magnets are fitted to the support rods almost densely and are held in a floating state by utilizing the repulsive force of each other without being screwed or the like, and are kept at a certain interval without tilting. Prevents jumping out.

[0015]

FIG. 1 shows an embodiment of the present invention.
The block-shaped main body 1 has an inlet passage 2 and an outlet passage 5 in which female threads 3 and 6 for connecting pipes are provided at laterally open ends to the outer peripheral surface, and the inlet passage 2 is opened to the lower surface of the main body 1. It has an inlet port 4 formed of a circular groove.

Further, a plug body 8 is fixed by screwing from below to a central portion surrounded by the inlet 4 of the main body 1, and a through hole 9 is formed in the lower outer peripheral surface and the upper surface of the plug body 8 with both ends open. Communicates with the outlet passage 5.

A cup-shaped casing 11 is airtightly attached to an outer lower surface of the introduction port 4 of the main body 1 by an O-ring 12 and a screw (not shown). Are concentrically housed in this casing 11. That is, these are suspended with the upper end fixed to the plug body 8. The filter element 14 has a proper gap 16 which communicates with the inlet 4 over the entire circumferential surface between the filter element 14 and the casing 11.
The lower end of the internal space 17 of the filter element 14 in which 5 is inserted and arranged on the central axis is closed by a closing member 18.

The gaseous fuel enters the gap 16 from the inlet passage 2 through the inlet 4, spreads and passes through almost the entire filter element 14, removes solid impurities and gathers in the internal space 17, and the outlet passage from the through hole 9. It is sent via 5. As described above, by utilizing almost the entire filter element 14, magnetic powder such as iron rust and non-magnetic solid impurities can be efficiently removed, but fine iron rust that has fallen off from the cylinder can be removed. It is hard to be done.

A permanent magnet 21 for removing fine iron rust that could not be removed by the filter element 14.
Has a thick disk shape and has a mounting hole 22 which is fitted in the support rod 15 substantially densely in the center, and four holes are used in this embodiment. These permanent magnets 21 are fitted on the support rod 15 from the lower end, and vertically adjacent magnets are arranged with the same magnetic pole, that is, N poles or S poles face each other.

As a result, the permanent magnets 21 are separated by the repulsive force of each other, but the plug body 8 having the upper end of the support rod 15 fixed and the pedestal 23 having the lower end of the support rod 15 fixed thereto.
Fix these as stoppers of the permanent magnets 21 at both ends, so that the two intermediate permanent magnets 21 are held at positions where the repulsive forces are balanced, that is, at positions at substantially equal intervals.

The permanent magnets 21 arranged at a constant distance from each other form a magnetic field, and therefore the internal space 1
The magnetic field is properly regulated in 7 in the direction of the central axis, and the gaseous fuel that has entered the internal space 17 passes through the magnetic field and reaches the through hole 9 almost without leakage.
In the meantime, fine-grained iron rust is also adsorbed by the permanent magnet 21.

It is a matter of course that the plug body 8, the support rod 15, and the pedestal 23 are made of a nonmagnetic material. Further, the permanent magnets 21 are fitted and held on the support rods 15 almost densely, and are held without tilting, and are automatically held at a constant interval by utilizing the repulsive force of each other. The assembling work is easier than the holding means. In particular, when the different magnetic poles are fitted to face each other, they are attracted to each other, so that there is an advantage that the assembly direction can be confirmed very easily.

In addition, the permanent magnet 21 does not dance against the repulsive force and is stable and constant because the vibration acceleration is small not only when it is installed and used in a stationary place but also when it is installed and used in an automobile body. Hold the spacing.

Furthermore, if the pedestal 23 is removed, the permanent magnet 21
It can be pulled out of the support rod 15 very easily by dropping it, and there is an advantage that maintenance and inspection can be performed easily.

[0025]

As described above, according to the present invention, in which a plurality of permanent magnets are arranged at a constant interval by utilizing the repulsive force of each other, the cost reduction and the weight reduction can be achieved with a small number of parts. At the same time, the assembling work can be simplified, and moreover, the magnetic field can be regularly formed almost all over the inside of the filter element to reliably remove the fine iron rust contained in the gaseous fuel.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic layout diagram of a gaseous fuel supply system of the engine.

3 is a longitudinal sectional view of a conventional filter used in the system of FIG.

[Explanation of symbols]

1 main body, 2 inlet passages, 4 inlet passages, 5 outlet passages, 8 plug bodies, 11 casings, 14 filter elements, 15 support rods, 17 internal spaces, 21 permanent magnets, 23 pedestals

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masaki Wada Inventor Masaki Wada 5-12 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Nippon Gasifier Co., Ltd.

Claims (1)

[Claims] 1. A main body having an inlet passage and an outlet passage for gaseous fuel, a cylindrical filter element and a plurality of permanent members mounted at intervals on a supporting rod installed on the central axis line inside the tubular filter element. And a casing containing a magnet,
A gas fuel filter in which the main body and the casing are connected by connecting the inlet passage and the outlet passage to the outside and the inside of the filter element, respectively;
The gas fuel filter, wherein the plurality of permanent magnets are fitted to the support rod with the same magnetic poles facing each other and are held at intervals by the repulsive force of each other.