Fuel sensor
A sensor and fuel technology, applied in the direction of the liquid level indicator for physical variable measurement, can solve the problems of inability to reflect the amount of fuel, inaccurate measurement, and inaccurate measurement of the fuel volume of the automobile fuel tank, etc., to achieve the effect of accurate measurement
Active Publication Date: 2014-03-12
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
However, when the car is on a bumpy or sloping road, the position of the liquid level does not reflect the actual amount of oil due to the sloshing of the liquid level, resulting in inaccurate measurement
That is, the current fuel sensor cannot accurately measure the amount of fuel in the car's fuel tank
Method used
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Embodiment
[0026] figure 1 It is a structural diagram of a fuel sensor disclosed in the embodiment of this application.
[0027] like figure 1 As shown, the fuel sensor disclosed in this embodiment includes a plurality of electrode plates 10 , a capacitance measuring circuit 20 and a processing device 30 , wherein the capacitance measuring circuit 20 is connected to the plurality of electrode plates 10 and the processing device 30 respectively.
[0028] A plurality of electrode plates 10 are vertically and parallelly arranged in the automobile fuel tank 40, such as figure 2 As shown, the edge of the electrode plate 10 is in close contact with the inner edge of the vehicle fuel tank 40, so that multiple electrode plates 10 can divide the vehicle fuel tank 40 into multiple independent spaces. The bottom of the electrode plate 10 is provided with an oil hole through which fuel can flow in each space.
[0029] The capacitance measurement circuit 20 is respectively connected to the plural...
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The invention discloses a fuel sensor which comprises a plurality of vertical electrode plates, wherein the electrode plates are arranged in a fuel tank of an automobile in parallel; a capacitance measurement circuit is used for measuring the capacitance values of the plurality of vertical electrode plates; then the capacitance values are calculated by a processing device according to a capacitance-fuel amount corresponding curve; finally, the fuel amount can be obtained. The capacitances of the electrode plates are only decided by the proportion of the volumes of the fuel oil and the air among the electrode plates, namely, are only decided by the fuel amount in the fuel tank and have nothing to do with the liquid level of the fuel oil, so that the proportional relation between the capacitance and the fuel amount is not changed even if the liquid level shakes, and the fuel amount in the fuel tank can be accurately measured.
Description
technical field [0001] The present application relates to the technical field of automobiles, and more specifically, relates to a fuel sensor. Background technique [0002] The fuel sensor is a sensor used to measure the amount of fuel in the fuel tank of the vehicle. The measurement signal is provided to the car instrument to display the amount of fuel and remind the driver to know the amount of fuel in the mailbox, so that the driver can add fuel according to the itinerary. , some models can also use this signal to calculate the estimated mileage of the current fuel level, which is more intuitive and convenient to help the driver arrange to add fuel. [0003] At present, the fuel sensor used in automobiles uses the float installed in the fuel tank to convert the liquid level position signal into a resistance signal, and measures the fuel volume by matching the conversion relationship between the resistance value and the fuel volume. However, when the car is on a bumpy or ...
Claims
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IPC IPC(8): G01F23/26
Inventor 梁小飞
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD