Vehicle oil level sensor and implementation method thereof

A technology of oil level sensor and implementation method, which is applied in the direction of buoy liquid level indicator, etc., which can solve the problems of low oil volume and difficult measurement, achieve accurate calculation results, and eliminate the effect of contact resistance interference

Active Publication Date: 2012-02-01
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the contact resistance R e Afterwards, through V m Calculate R m The formula is: R e It is difficult to measure, so the actual calculation of th

Method used

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  • Vehicle oil level sensor and implementation method thereof
  • Vehicle oil level sensor and implementation method thereof
  • Vehicle oil level sensor and implementation method thereof

Examples

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[0049] See image 3 , The vehicle oil level sensor of the present invention includes a fuel tank 10, a sliding rheostat 20, a resistor one 22, a resistor two 23, an ECU 30 and an instrument 40. Among them, the fuel tank 10 has a float 11 floating on the fuel surface, and the float 11 controls the position of the sliding piece 21 on the sliding varistor 20. One end of the sliding varistor 20 is connected in series with a resistor 22 and connected to the power supply V through the resistor 22, and the sliding piece 21 on the sliding varistor 20 is connected in parallel with the resistor two 23 and grounded through the resistor two 23. The total resistance of the sliding rheostat 20 is R, and the effective resistance obtained by the slide 21 is R m , The resistance of resistance 22 is R c , The resistance of resistor two 23 is R d . One end of the sliding varistor 20 and resistor 22 in series is connected to ECU 30 and outputs voltage V to ECU 30 1 , The other end of the sliding r...

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Abstract

The invention discloses a vehicle oil level sensor and an implementation method thereof. The vehicle oil level sensor comprises an oil tank, a slide rheostat, a first resistor, a second resistor, an ECU (electronic control unit) and an instrument, wherein the ECU comprises two analog-digital converters, a V1 sampling module, a V2 sampling module, a V1 backup module, a V2 backup module, a V1 diagnosis module, a V2 diagnosis module, two computing units, a Rm backup module, a Rm default module, a Rm diagnosis module and a filter. The invention also discloses an implementation method of the vehicle oil level sensor. By adopting the vehicle oil level sensor and the implementation method thereof provided by the invention, two voltage inputs V1 and V2 can be collected and the fuel oil volume in the oil tank can be obtained by calculation, thus interference of the contact resistance of the slide rheostat can be eliminated as much as possible and a more accurate calculated result can be obtained.

Description

technical field [0001] The invention relates to an oil level detection device and a detection method of a motor vehicle fuel tank. Background technique [0002] The vehicle fuel level sensor provides the driver with information on the amount of fuel in the fuel tank of the motor vehicle, so that the driver can refill the fuel in good time before the fuel is exhausted. [0003] see figure 1 , the existing vehicle oil level sensor includes a fuel tank 10, a sliding rheostat 20, a resistor 22, an ECU (Electronic Control Unit) 30 and an instrument 40. Wherein the height of the fuel tank 10 (the height of the accommodating space where the fuel is held) is H, and the height of the fuel is H m . There is a float 11 in the fuel tank 10 floating on the fuel surface. One end of the sliding rheostat 20 is grounded, and the other end is connected to a voltage V through a series connected resistor 22 . The total resistance of the sliding rheostat 20 is R, and the variable resistance...

Claims

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Application Information

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IPC IPC(8): G01F23/30
Inventor 秦文刚陈侠谭超高丹李君习纲丁锋潘文朱振华鹿洪芳
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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