Sliding fluid level-detecting device

Abstract

A sliding fluid level-detecting device which is mounted in a fuel tank of a vehicle and detects a remaining amount of a liquid fuel in the tank by sliding, on a plurality of stripes of an electrode formed at an electrode part electrically connecting with a fuel meter, a contact point provided on a slider interlocking with displacement of a float floating on a fluid surface of the liquid fuel, wherein the electrode is formed out of a glass-incorporated silver-palladium alloy where glass is mixed in an amount of 30 to 50 parts by weight per 100 parts by weight of a silver-palladium alloy and the contact point is formed out of a conductive material having a Vickers hardness (Hv) of 190 to 250.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a situation where a sliding fluid level-detecting device is mounted in a fuel tank.

FIG. 2 shows an enlarged view in the vicinity of the electrode and contact point of an electrode part.

FIG. 3 shows a chart where a remaining amount of gasoline is measured using an electrode of (silver/palladium/glass=70/30/18) in Test-1.

FIG. 4 shows a chart where a remaining amount of gasoline is measured using an electrode of (silver/palladium/glass=70/30/31) in Test-1.

FIG. 5 shows a chart where a remaining amount of gasoline is measured using an electrode of (silver/palladium/glass=60/40/43) in Test-2.

Claims

1. A sliding fluid level-detecting device which is mounted in a fuel tank of a vehicle and detects a remaining amount of a liquid fuel in the tank by sliding, on a plurality of stripes of an electrode formed at an electrode part electrically connecting with a fuel meter, a contact point provided on a slider interlocking with displacement of a float floating on a fluid surface of the liquid fuel, wherein the electrode is formed out of a glass-incorporated silver-palladium alloy where glass is mixed in an amount of 30 to 50 parts by weight per 100 parts by weight of a silver-palladium alloy and the contact point is formed out of a conductive material having a Vickers hardness (Hv) of 190 to 250.

2. The sliding fluid level-detecting device according to claim 1, wherein the ratio of (silver/palladium) in the silver-palladium alloy is from 70/30 to 60/40 as a weight ratio.

3. The sliding fluid level-detecting device according to claim 1, wherein the contact point is formed out of a copper-nickel alloy of (copper 70:nickel 30) as a weight ratio.

4. The sliding fluid level-detecting device according to claim 1, which is used for a liquid fuel having a sulfur concentration of 100 ppm or less.