CN2473599Y - Oil quantity sensor - Google Patents

Abstract

Provided is a sensor which can raise the precision of detection to the vehicle oil quantity. The utility model is designed to add a length to the slide resistance chip of the original vehicle oil quantity sensor so as to increase the turns of the coil on the slide resistance chip by more than 10 times. Furthermore, the slide resistance chip is fixedly installed in the arc shaped outer shell out of the oil tank in order to increase the length of the slide arm 2. As the buoyancy is generated with the change of the oil quantity in the oil tank5, the buoy 3 drives the floating pole 4 and the slide arm 2. As the scanned turns of coils by the slide arm 2 on the slide resistance 1 are increased, the voltage detection points to detect the oil quantity are also increased, the resolution of detection is raised and the precision of detection is enhanced as a result.

Description

A kind of novel fuel-quantity transducer

The utility model relates to the level sensing detection technique, is applicable to that various vehicle oil masses detect.

In the prior art, the vehicle fuel-quantity transducer is made up of the buoy and the wire-wound swept resistance that are installed in the fuel tank.By the travelling arm of buoy drive swept resistance under the effect that oil mass changes, change the resistance of swept resistance, the electric current that flows through the oil mass indicating gauge is changed, the pointer of indicating gauge is made corresponding mobile on index dial, reach the purpose of indication oil mass.Because swept resistance is installed in the fuel tank, be subjected to the restriction in fuel tank internal height and space, the swept resistance travelling arm is very short, the distance of sliding is generally at 20～30mm, circle surplus the coil of swept resistance also only has tens to 100, therefore certain corresponding coil turn that moves of oil mass variation is less, and resolution is very low, and the oil meter pointing accuracy is ± 10%.

The purpose of this utility model is to provide a kind of high-resolution fuel-quantity transducer, can improve the oil mass pointing accuracy greatly.

The purpose of this utility model is achieved in that the resistor disc with the wire-wound swept resistance increases length, make the number of turn of coil increase by 10 times at least, the swept resistance sheet is fixed on the arc shell that designs, travelling arm lengthening with swept resistance, increase sweep radius, the distance that identical oil mass variation is moved on resistor disc strengthens, and the corresponding coil ratio that slided was many originally more than 10 times, reached the purpose that improves resolution.For not being subjected to the restriction in fuel tank internal space, swept resistance and shell are installed in outside the fuel tank.

Because adopt such scheme, the precision of sensor can improve greatly, with the supporting use of digital oil mass indicating gauge, can make the oil mass pointing accuracy reach ± 1%.And simple in structure, easy to install and use, need not do any change to former car fuel tank.

Be described further below in conjunction with drawings and Examples.

Fig. 1 is an electrical schematic diagram of the present utility model,

Fig. 2 implements illustration.

Among the figure: 1 wire-wound swept resistance sheet, 2 swept resistance travelling arms, 3 buoys, 4 fly rods, 5 fuel tanks.

In Fig. 2 embodiment; buoy 3, fly rod 4 is the integral body of an interlock with the travelling arm 2 of swept resistance; be installed in fuel tank 5; the swept resistance travelling arm 2 that has extended is installed in outside the fuel tank, and buoy 3 upper and lower mobile angles equate at the upper angle that swept resistance sheet 1 moves with the swept resistance travelling arm.The variation of oil masses in the fuel tank 5; buoy 3 is subjected on the buoyancy function; float down; drive fly rod 4; swept resistance travelling arm 2 is made corresponding mobile on wire-wound resistor disc 1; thus voltage on the swept resistance travelling arm 2 changed; because the variation oil mass of each circle coil correspondence significantly reduces than the sensor that uses now; be that certain oil mass changes the sensor that coil ratio that the travelling arm that makes swept resistance moves uses now and increases greatly on wire-wound resistance; and the magnitude of voltage that every circle coil detects when contact by the travelling arm of swept resistance is exactly the check point that we need; check point is many; resolution is just high, so accuracy of detection also just obtains raising.

Claims (3)

1, a kind of sensor that can improve detection vehicle oil mass precision.It is a Level Detection principle of utilizing original vehicle fuel-quantity transducer, by buoy 3 under buoyancy function, drive fly rod 4, swept resistance travelling arm 2 and on swept resistance 1, move, detect the magnitude of voltage on each the circle coil that moved, reach the purpose that detects oil mass.It is characterized in that: increase the length of wire-wound swept resistance and the number of turn of coil, the swept resistance sheet is installed in the outer arc shell of fuel tank, the distance that the length that increases travelling arm changes certain oil mass and moves on swept resistance extends, scanned coil turn increases, check point increases, and reaches to improve resolution and the accuracy of detection that detects.

2, fuel-quantity transducer according to claim 1 is characterized in that wire-wound swept resistance sheet is mounted to arc.

3, the swept resistance sheet according to the described fuel-quantity transducer of claim 1 is mounted in the fuel tank outside.Travelling arm by lengthening is electrically connected with the swept resistance sheet.

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