KR100995742B1 - An electrode which uses double printing for gauging amount of fuel vehicle - Google Patents

Abstract

 In the method of manufacturing a fuel gauge for a vehicle by the double-stranded chain of the present invention, a conductor containing gold (Au), platinum (Pt), and palladium (Pd) at a constant ratio is applied only to the minimum portion where the contact contacts when printing the conductor electrode, and the other portion. Utilizes a double-printing method for applying relatively inexpensive silver palladium (AgPd) alloy-based conductors to apply a material of conductor electrodes with high corrosion resistance, fuel resistance, and chemical resistance. At the same time, it provides an economical manufacturing method in terms of manufacturing cost.

Vehicle, fuel, gauge, plot, electrode, substrate, wiper, contacts, gold, platinum, palladium, silver, double chain

Description

An electrode which uses double printing for gauging amount of fuel vehicle}

The present invention provides a method for manufacturing a conductor electrode of a fuel gauge for a vehicle using a double-stranded high quality material that provides stable performance in manufacturing a conductor electrode of a resistor substrate applied to a fuel level gauge (detection device) indicating a fuel amount of an automobile. The present invention relates to a method for manufacturing a fuel gauge conductor electrode for a vehicle by using a double chain which reduces manufacturing costs while using.

The present invention relates to a method of manufacturing a conductor electrode of a fuel gauge for a vehicle by a double chain, and more particularly, to a fuel gauge for a vehicle, and more specifically, a material forming an electrode of a substrate improves operation efficiency by preventing variation in resistance by using precious metals. At the same time, it is to provide a manufacturing method for reducing the manufacturing cost in order to solve the difficulty that the use is limited due to the large cost burden caused by the expensive manufacturing material due to the expensive material of precious metals.

In general, a vehicle fuel gauge is a device mounted inside the fuel tank to measure and display the amount of fuel.

The fuel gauge for the vehicle is provided with a float that rises and falls according to the level of fuel stored in the fuel tank, a wiper connected to the plot and interlocked when the plot is raised and lowered, and corresponding to the wiper. Is made of a substrate that detects a variable resistance value when the contact of the contact sequentially moves to the outer surface thereof.

In the vehicle fuel gauge having such a structure, when the plot is raised and lowered according to the level of fuel, the wiper is interlocked and rotates to sequentially move the contact with a plurality of electrodes disposed on the substrate. The cumulative resistance value of the connected resistance layer is changed, and the amount of fuel can be recognized by detecting it.

As such, since the resistance value is detected by the actual contact between the contact of the wiper and the electrode of the substrate, the contact and the electrode should be made of a conductive material.

In the case of the conductor electrode, a silver palladium (AgPd) alloy including a glass component is mainly used.

However, the silver palladium (AgPd) electrode chemically reacts with sulfur or oxidized components contained in the vehicle fuel, resulting in abnormal corrosion resistance, and thus does not indicate an accurate fuel level.

Also, these days, the quality of fuels and main component fuels of various countries are slightly different, so that not only gasoline, diesel, diesel fuels, but also alcohol-containing gasoline (E20 ~ 25), alcohol main fuel (E85), biodiesel, etc. Even the need for a fuel gauge with corrosion resistance and durability is required.

And because of this fuel diversity, automakers require fuel gauge manufacturers to make fuel gauges that meet and satisfy endurance and corrosion tests for a variety of fuels.

The above-mentioned conventional electrodes are notable for the corrosion resistance and chemical resistance of the fuels required by these automobile companies and various fuels of various countries around the world, and thus significantly reduce the operational stability.

Therefore, some fuel gauge manufacturing companies produce conductor electrodes with only noble metals such as gold (Au), platinum (Pt), and palladium (Pd) alloys except for silver (Ag) at all. They also manufacture fuel gauges that meet the endurance life requirements of the automakers mentioned. However, since gold (Au), platinum (Pt), and palladium (Pd) alloys are expensive precious metals, there was a limited difficulty in restricting them to only some high-end vehicles.

Therefore, the method of manufacturing a conductor electrode of a fuel gauge for a vehicle by the double-chain of the present invention is a high-quality material of precious metal suitable for the conductor electrode of a fuel gauge that satisfies the corrosion resistance, chemical resistance, and durability of various automobile fuels and various fuels required by automobile manufacturers. It is to provide a manufacturing method with a low manufacturing cost economically using.

Prior to the method of manufacturing a fuel gauge for a vehicle by the double-chain of the present invention, a vehicle fuel gauge (fuel amount detection device) is a plot that slides according to the fuel level in a fuel tank, and an arm that moves according to the operation of the plot. The contact portion of the wiper is installed in connection with, the conductive electrode sliding the contact, the conductor electrode is made of a printed substrate.

As a commonly used conductor electrode material, silver palladium (AgPd) alloy is mainly used. In this case, corrosion occurs in sulfur-containing fuels, and chemical and corrosion resistance are insufficient in various fuels such as biodiesel and alcohol-based fuels that do not contain sulfur, resulting in unstable fuel instruction.

In general, the reason why silver palladium (AgPd) alloy is used as a conductor electrode is that it is excellent in conductivity and is not expensive compared to palladium (Pd), gold (Au), platinum (Pt), and is sufficiently economical. As described above, however, silver palladium (AgPd) alloys are significantly less corrosion resistant in fuel.

Therefore, in some fuel gauges, the conductive electrode with sliding contacts has the most stable performance in the above-mentioned fuels when platinum (Pt) and palladium (Pd) are added with gold as the main component. . However, gold, platinum, and palladium are expensive materials classified as precious metals. Therefore, when manufacturing a resistard using this material, the manufacturing cost is 7 ~ 10 times higher than that of conventional silver palladium (AgPd) electrode. There is a limit that can only be used on some luxury vehicles.

Therefore, in the present invention, the conductor electrode is printed only on the smallest portion of the contact that contacts with gold ( Au ), Platinum ( Pt ), Palladium ( Pd ) Apply the conductor with a certain ratio and the other part is relatively inexpensive Silver Palladium (AgPd) Alloy  The production cost is reduced by using the double-printing method of coating the conductor. 3 or less  Significantly lower To .

As described above, an electrode in which a suitable amount of platinum (Pt) and palladium (Pd) is composed mainly of gold (Au) as a main component exhibits stable performance in a fuel amount detector (fuel amount gauge). Since the printed materials are expensive precious metals, the printing process is separated twice so that expensive materials and relatively inexpensive conductor materials are placed on the substrate, thereby minimizing the area of expensive precious metal materials. Compared with printing, manufacturing costs can be reduced to less than 1/3.

The present invention is not limited to the specific preferred embodiments described above, as any person having ordinary skill in the art may change the present invention without departing from the gist of the present invention as claimed in the claims. .

The manufacturing method of the fuel gauge for a vehicle by the double-chain of the present invention can be seen more clearly with reference to the accompanying drawings.

1 is a structural diagram schematically showing a structure of a vehicle fuel gauge according to a preferred embodiment of the present invention, Figure 2 is a state in which the contact of the wiper contacts the electrode disposed on the substrate of the vehicle fuel gauge shown in FIG. 3 is a front view showing a substrate of the vehicle fuel gauge shown in FIG. 2, FIG. 4 is a front view showing a first printing step in the manufacturing process of the vehicle fuel gauge according to the present invention with a double chain, and FIG. 5 is a front view showing a second printing step in the manufacturing process of the fuel gauge for vehicles by the double-chain of the present invention, Figure 6 is a front view showing a resistance coating step during the manufacturing process of the fuel gauge for vehicles by the double-chain of the present invention, Figure 7 Is a flow chart showing the manufacturing process of the fuel gauge for a vehicle by the double-chain of the present invention.

As shown in FIG. 1, the vehicle fuel gauge 1 proposed by the method for manufacturing a vehicle fuel gauge using the double-stranded chain of the present invention includes a substrate provided on a support plate 2 mounted inside the fuel tank T. 3), a resistive layer 4 disposed on the substrate 3, and a resistive layer 4 disposed on the substrate 3 and extending from the resistive layer 4; A plurality of electrodes 5 formed thereon, and a contact 6 provided to be hinged to the support plate 2 and sequentially contacting the plurality of electrodes 5 at the time of hinge movement. A wiper 7 made of gold and a palladium-based metal component, and provided inside the fuel tank T, is lowered according to the level of fuel, and connected to the wiper 7 to interlock the wiper 7. And plot (9).

In the vehicle fuel gauge having such a structure, the support plate 2 is provided on the inner wall of the fuel tank (T).

The wiper 7 is connected by the plot 9 and the arm 11 so that when the plot 9 moves up and down according to the level of the fuel, the wiper 7 interlocks with each other on the substrate 3. Will move.

The substrate 3 is disposed on the surface of the support plate 2 so as to correspond to the wiper 7. The substrate 3 comprises a conventional substrate, preferably a ceramic substrate. In addition, the resistance layer 4 disposed on the substrate 3 is continuously formed at the edge of the substrate 3 and is formed of a material having an appropriate resistance value.

In addition, the plurality of electrodes 5 are discontinuously arranged by extending in parallel from the resistive layer 4, respectively.

Thus, when the wiper 7 is interlocked with the plot 9 and rotated on the substrate 3, the contact 6 of the wiper 7 sequentially contacts the plurality of electrodes 5 arranged discontinuously. A cumulative resistance value is detected from each of the resistance layers 4 which are continuously moved and continuously arranged, and the controller (not shown) calculates the amount of fuel and displays it on the instrument panel 3 based on the detected resistance value.

On the other hand, as described above, when an expensive material of gold (Au), palladium (Pd) or platinum (Pt) is applied to the electrode 5 of the substrate 3, the manufacturing cost greatly increases.

Therefore, as shown in FIGS. 5 to 6, gold (Au), platinum (Pt), and palladium (Pd) alloys are applied only to a minimum portion of the electrodes 5 of the substrate 3 to which the contact 6 contacts. In addition, the other part may apply a silver palladium (AgPd) alloy-based conductor component.

In the present invention, the conductive electrode of the contact portion is preferably a mixture of gold (Au), platinum (Pt), palladium (Pd) of 75 to 80% by weight, 11 to 16% by weight, 9% by weight It is suitable to use.

In addition, the method of manufacturing a conductor electrode of a fuel gauge for a vehicle by the double-chain of the present invention is completed through a four-step manufacturing process.

1. Primary Electrode Printing Step

As shown in FIG. 4, first, a step of forming a contact portion 20 using a conductor material of gold (Au), platinum (Pt), and palladium (Pd) alloy on a substrate 3 is performed by a first printing process. Proceed. At this time, the contact portion 20 can reduce the manufacturing cost by applying to the minimum area that the contact of the wiper 7 can contact.

In the present invention, the conductive electrode of the contact portion is preferably a mixture of gold (Au), platinum (Pt), palladium (Pd) of 75 to 80% by weight, 11 to 16% by weight, 9% by weight It is suitable to use.

2. Conductor Secondary Printing Step

As shown in Fig. 5, the step of forming the conductive portion 24 extending from the contact portion 20 by the secondary printing process is performed. In this case, the conductive part 24 can significantly lower the manufacturing cost by using a conductive material of a lower cost than the contact portion 20.

In the present invention, in the case of the conductive electrode of the portion where the contact does not directly contact, preferably, silver (Ag) is made of silver palladium alloy (AgPd) to 70 to 80% and palladium (Pd) is mixed by mixing 20 to 30% do.

3. Resistance application step

As shown in FIG. 6, the resistive layer 4 is continuously disposed by continuously applying a resistive material to the edge of the substrate 3.

4. Resistance Trim  step

It can be completed by trimming the resistance layer 4 of the substrate 3 manufactured through the above steps.

1 is a structural diagram schematically showing a structure of a fuel gauge for a vehicle according to an exemplary embodiment of the present invention.

FIG. 2 is a perspective view illustrating a state in which a wiper contact contacts an electrode disposed on a substrate of the vehicle fuel gauge illustrated in FIG. 1.

3 is a front view showing a substrate of the fuel gauge for a vehicle shown in FIG.

Figure 4 is a front view showing a first printing step of the manufacturing process of the conductor electrode of the fuel gauge for a vehicle by the double-chain of the present invention.

Figure 5 is a front view showing a second printing step of the manufacturing process of the conductor electrode of the fuel gauge for a vehicle by the double-chain of the present invention.

Figure 6 is a front view showing a resistance coating step of the manufacturing process of the conductor electrode of the fuel gauge for a vehicle by the double-chain of the present invention.

Figure 7 is a flow chart showing a conductor electrode manufacturing process of the fuel gauge for a vehicle by the double-chain of the present invention.

Explanation of symbols on the main parts of the drawings

1: vehicle fuel gauge, 2: support plate,

3: substrate, 4: resistive layer,

5: electrode, 6: contact,

7: wiper, 8: plot
26: shield

Claims (6)

The vehicle fuel gauge 1 includes a substrate 3 provided on the support plate 2, a resistance layer 4 disposed on the substrate 3, and the substrate 3 inside the fuel tank T. Disposed on and extending from the resistance layer 4 so as to be hinged to the support plate 2, and having a contact 6 sequentially contacting the plurality of electrodes 5 during the hinge movement. The contact 6 is provided in the wiper 7 made of a metal component of palladium series, and inside the fuel tank T, and moves up and down depending on the level of the fuel, and is connected to the wiper 7 to connect the wiper ( 7) a plot 8 for interlocking and having a contact portion 20 on the substrate 3, forming a conductive portion 24 extending from the contact portion, and forming a resistive layer 26 at the edge of the substrate. In the method of manufacturing a conductor electrode of a fuel gauge for a vehicle by the formed double chain, A conductor electrode primary printing step (51) on which the contact portion (20) is formed on the substrate (3) with a conductor material of gold (Au), platinum (Pt), and palladium (Pd) alloy; A secondary electrode printing step 52 for conducting the step of forming the conductive part 24 extending from the contact part 20; A resistance coating step 53 is provided to continuously arrange the resistance layer 4 by continuously applying a resistance material to the edge of the substrate 3. A resistance trimming step 54 for trimming the resistance layer 4 of the substrate 3 manufactured through the coating step 53 is provided to lower manufacturing costs and improve fuel resistance and corrosion resistance. Conductor electrode manufacturing method of a fuel gauge for a vehicle by a double-chain characterized in that. The method of claim 1, Gold (Au), platinum (Pt), and palladium (Pd) alloys are applied only to the smallest portion of the electrode 5 of the substrate 3 to which the contact 6 contacts, and the other portion is a silver palladium (AgPd) alloy system. A method of manufacturing a conductor electrode of a fuel gauge for a vehicle by a double chain, by applying a conductor component to reduce the manufacturing cost. The method of claim 2, In the case of the conductive electrode 5 in contact with the contact 6, the ratios of gold (Au), platinum (Pt), and palladium (Pd) were 75 to 80% by weight, 11 to 16% by weight, and 9% to weight, respectively. Conductor electrode manufacturing method of a fuel gauge for a vehicle by a double-chain characterized in that it is used by mixing. delete delete The method of claim 1, In the case of the conductor electrode of the portion where the contact 6 is not in direct contact, silver (Ag) is mixed with silver palladium alloy (AgPd) and 70 to 80% of palladium (Pd) is mixed and printed. Conductor electrode manufacturing method of a fuel gauge for a vehicle by a double-chain.

Images