Liquid surface detecting device

a detection device and liquid surface technology, applied in liquid/fluent solid measurement, instruments, machines/engines, etc., can solve the problems of lowering the accuracy of liquid surface detection and the risk of wearing a part of the electrode, so as to improve the degree of precision of detecting the liquid surface, reduce the abrasion of the contact parts, and reduce the friction resistance between the liquid and at least one of the arm and the float.

Inactive Publication Date: 2008-07-17
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

The technical effect of this innovation lies in reducing the amount of force required for an airborne detector to move its components backward when there're no liquids nearby during detection (fuel). This reduces wear caused by moving any part that comes into direct contact with the gas while still allowing them to freely rotate around inside. Additionally, lubricants are added to ensure they stay properly position without getting stuck due to excessive pressure applied against these areas.

Problems solved by technology

This patented describes a technical solution used in vehicles where liquids like gasoline can accumulate inside their tanks due to evaporation during use over time. When this occurs, water vapor condenses onto certain parts of the vehicle's interior surfaces causing rust damage. To prevent these damaging effects, various devices called sensors were developed along with the aid of lubricants applied to the internal walls of the tank. These solutions include applying coatings (such as fluorine) to improve adhesion properties while also adding layers of electrically resistant materials near the sensor ends to increase its effectiveness against oxidation compared to nonmetallic materials.

Method used

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  • Liquid surface detecting device
  • Liquid surface detecting device
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Examples

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embodiment 1

[0026]FIGS. 1 to 3 are views illustrating a first embodiment according to the invention.

[0027]FIG. 1 is a side view illustrating a liquid surface detecting device 1. The liquid surface detecting device 1 is incorporated in a liquid fuel tank of the vehicle, and is adapted to detect the liquid surface of the fuel in the fuel tank.

[0028]The liquid surface detecting device 1 includes the same members substantially as those of the conventional liquid surface detecting device 101 including a substrate 105, a resistance layer 107, a plurality of electrodes 108, and a sliding ruler 110 composed of a contact plate 112 and a contact point 113 as shown in FIG. 5. These members are disposed in a case la in FIG. 1 so as to performs the same functions as that of the conventional liquid surface detecting device. Since these members are the same as those of the known liquid surface detecting device, these members are omitted in FIG. 1 in order to prevent the depiction thereof from being complicated.

[

embodiment 2

[0051]In the embodiment 1, although the liquid-repellent coating 6 is formed on the whole surface of the movable unit 4, the liquid-repellent coating 6 may be formed on at least one of the float 2 and the arm 3.

[0052]The other configuration is the same as that in the embodiment 1. Even in the second embodiment, the same advantage and effect as those of the embodiment 1 can be exhibited.

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Abstract

In a liquid surface detecting device including a movable unit having an arm and a float, for detecting a liquid surface in response to a positional variation of the float, a liquid-repellent coating is formed on the surface of at least one of the arm and the float. Accordingly, it is possible to improve degree of precision of detecting the liquid surface since the movable unit such as the float is restrained from being displaced in response to a temporary displacement of the liquid surface in a fuel tank which is caused when a vehicle oscillates.

Description

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Claims

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Application Information

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Owner AISAN IND CO LTD
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