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System and method for estimating fuel quantity of fuel tank of automobile

A technology of automobile fuel tank and fuel quantity is applied in the field of fuel quantity estimation system of automobile fuel tank to achieve the effects of accurate and intuitive detection, scientific and rigorous estimation, and improvement of anti-interference ability.

Pending Publication Date: 2022-06-24
SHAANXI CCCC TIANJIAN CAR NETWORKING INFORMATION TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For hardware and cost issues, the "liquid level-oil volume curve" is obtained by calibrating the fuel tank and the oil rod sensor, and then the method in this paper is continuously iterated to update the oil volume value; to solve the problem of estimation accuracy, the steady state continuous correction and Non-stationary continuous data fusion solution

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  • System and method for estimating fuel quantity of fuel tank of automobile

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Embodiment

[0100] In the specific implementation: 1. The detection of the liquid level by the fuel rod of the commonly used fuel tank has high measurement accuracy and confidence under static conditions, but when the liquid level vibration changes drastically, the measurement accuracy will become worse or even introduce enough to make the measurement results. Distortion error; 2. The calculation of the instantaneous fuel consumption by the ECU of the engine electronic control unit is relatively accurate;

[0101] Based on the above three points, the present invention provides the following method for estimating the fuel volume of the fuel tank: when the pitch angle and roll angle of the vehicle are less than the preset thresholds of the system, the current fuel volume is obtained and saved by using the fuel rod measurement data through the calibration data of the fuel tank As the initial value of the dynamic fuel quantity estimation; when the engine is started, the state equation model is...

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Abstract

The invention discloses an automobile fuel tank fuel quantity estimation method and system. The method comprises the steps that firstly, the system detects the pitch angle and the roll angle of the current whole automobile and conducts timing or timing zero clearing; 2, reading a measured value Vi of a sucker rod sensor, continuously measuring for N times, and solving a mean value or a smooth filtering value of V1-VN to obtain a current liquid level L; 3, implementing a Kalman filter; fourthly, the optimal value, estimated in the third step, of the current oil mass is sent to an oil mass display module; 5, the process is executed circularly, and the fuel quantity of the fuel tank is updated continuously. The invention further provides a system for estimating the fuel quantity of the automobile fuel tank. According to the method, an oil tank and an oil rod sensor are calibrated to obtain a liquid level-oil quantity curve, then the oil quantity value is continuously iterated and updated through the method, and the estimation precision problem is solved through steady-state continuous correction and unsteady-state continuous data fusion.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a system and method for estimating the fuel quantity of an automobile fuel tank. Background technique [0002] At present, basically all fuel vehicles use the same or similar solutions for monitoring and indicating the current fuel level of the fuel tank: the current fuel level is detected by the fuel rod or oil float sensor installed in the fuel tank, and the fuel tank is calibrated by querying the fuel tank. A good "liquid level-percentage" curve, the percentage of remaining oil is obtained, and finally displayed on the instrument panel in the form of grids. [0003] The development and application of the above methods are very mature and extensive, but they also have shortcomings: [0004] 1. Only the number of grids of the current remaining oil quantity can be indicated by the pointer of the oil gauge, and the intuitive representation of the current oil quant...

Claims

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Application Information

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IPC IPC(8): G01F23/80G06F17/16G06F17/18
CPCG06F17/18G06F17/16
Inventor 李健王学栋王继君孟宪芳冶少刚曾小丽
Owner SHAANXI CCCC TIANJIAN CAR NETWORKING INFORMATION TECH CO LTD
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