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Sensing device for canisters

A sensing device and sensor technology, applied in the charging system, adding non-fuel substances to the fuel, machines/engines, etc., can solve the problems of current application unit exposure, leakage or electric sparks, etc., to promote heat transfer and avoid leakage and EDM, the effect of increasing sensitivity

Inactive Publication Date: 2013-08-21
MAHLE FILTER SYST JAPAN CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, in such a case that the coating or covering of the current applying unit is damaged due to degradation over time, for example, there is a risk that the current applying unit will be exposed, and then electric leakage or electric spark will occur

Method used

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  • Sensing device for canisters
  • Sensing device for canisters
  • Sensing device for canisters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In the following description, embodiments of the present invention will be explained with reference to the drawings.

[0029] figure 1 is a system block diagram showing a sensing device for a tank according to a first embodiment of the present invention. The box-shaped synthetic resin case 11 of the tank is filled with activated carbon 10 as an adsorbent for adsorbing evaporative fuel (or evaporative fuel). This housing 11 is formed by a main body 12 , one end of which is open, and a cover 13 which closes the open end of the main body 12 . A U-shaped gas passage is formed in the housing 11, and a purge port 14 and a filling port 15 are provided at one end side of the gas passage. An air port 16 leading to the atmosphere is provided at the other end side of the gas channel. The filling port 15 is connected to a fuel tank 18 of the vehicle through a filling line (filling pipe) 17 . The purge port 14 is connected to an intake passage 22 of an internal combustion engin...

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PUM

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Abstract

A sensing device for canisters is provided with a sensor (40) for canisters, which senses the state of activated carbon (10) that fills a casing (11) of a canister. The peripheries of a temperature sensing element (51) of the sensor (40), said temperature sensing element (51) being arranged within the casing (11), and a current applying unit are covered with a thick non-conductive insulating material (54). A root portion (56) at one end of a heat transfer plate (55) that has high thermal conductivity, said root portion (56) being covered with the insulating material (54), is arranged adjacent to the temperature sensing element (51) so as to increase the sensor sensitivity by increasing the heat transfer. The front end portion (57) of the heat transfer plate (55), said front end portion (57) protruding from the insulating material (54), is exposed in the casing (11) that is filled with the activated carbon (10). An insulating layer (63) is at least formed on the surface of the root portion (56) by a surface treatment.

Description

technical field [0001] The present invention relates to a sensing device for a tank having a tank sensor that detects the state of an adsorbent filled inside the casing of the tank. Background technique [0002] Patent Document 1 discloses an example of a sensor for a tank that detects the state of the heat capacity, temperature, and the like of an adsorbent (eg, activated carbon) filled inside the casing of the tank. A temperature sensing element (heating portion) of the sensor and a part of a current applying unit (such as an electrode and a wire) that supplies current to the temperature sensing element are arranged in a canister case filled with activated carbon. For this reason, in such a case that the coating or covering of the current applying unit is damaged due to degradation over time, for example, there is a risk that the current applying unit will be exposed, and then leakage or spark will occur. Therefore, as in Patent Document 2 figure 2 As shown in , the peri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/08
CPCF02M25/0854F02M25/0809
Inventor 松泽直纪中野胜仓桥优萱沼和夫远山诚
Owner MAHLE FILTER SYST JAPAN CORP