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Oil mass detection method

A detection method and technology for oil quantity, applied in the direction of liquid level indicator for physical variable measurement, etc., can solve the problem of inaccurate calculation of oil quantity, and achieve the effect of improving accuracy

Active Publication Date: 2016-06-15
大陆汽车车身电子系统(芜湖)有限公司
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Problems solved by technology

The traditional algorithm of determining the oil volume based solely on the current measured resistance value will cause the problem of inaccurate calculation of the oil volume.

Method used

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Embodiment Construction

[0016] In the following description, numerous specific details are set forth in order to enable those skilled in the art to fully understand the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to the particular embodiments described. Instead, it is conceivable to implement the present invention in any combination of the following features and elements, regardless of whether they relate to different embodiments. Accordingly, the following aspects, features, embodiments and advantages are by way of illustration only and should not be considered elements or limitations of the claims unless explicitly stated in the claims.

[0017] As mentioned in the aforementioned prior art, the resistance of the oil sensor may change due to corrosion or the like. According to the research of the inventors of the p...

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Abstract

A method for detecting oil quantity, comprising: establishing a circuit model, the circuit model including the equivalent resistance of the sliding rheostat corresponding to the oil quantity sensor, the equivalent resistance corresponding to the change of the resistance value of the sliding rheostat, and the equivalent resistance corresponding to the change of the resistance value of the sliding rheostat, etc. One end of the effective resistance is grounded, and the other end is connected to the terminal of the sliding contact of the sliding rheostat in the circuit model. The position of the sliding contact is related to the current liquid level of the fuel tank; the voltage at both ends of the sliding rheostat is measured; based on the measured voltage and the voltage of the sliding rheostat The initial total resistance calculates the current resistance value of the equivalent resistance of the sliding rheostat in the circuit model; the current oil volume is obtained according to the ratio of the calculated current resistance value to the initial total resistance of the sliding rheostat. Therefore, the oil quantity closer to the real value is obtained, and the accuracy of oil quantity detection is improved.

Description

technical field [0001] The invention relates to the development of automobile instrument technology, in particular to an instrument-based oil quantity detection method. Background technique [0002] At present, the fuel quantity in the automobile fuel tank is measured by the fuel quantity sensor in the fuel tank. The principle of the sensor is like a sliding rheostat, and the meter determines the fuel quantity according to the current resistance value. Common fuel level sensors include two-wire sensors and three-wire sensors. [0003] figure 1 It shows the schematic diagram of the principle of realizing oil quantity detection and instrument display through two-wire sensor. refer to figure 1 As shown, the tank liquid level is related to the position of the sliding contact on the sliding rheostat R. The instrument determines the current oil volume (from empty to full) by measuring the resistance between the output ADC and the ground terminal (from 0 to the maximum resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/24G01F23/22
Inventor 徐洋
Owner 大陆汽车车身电子系统(芜湖)有限公司
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