Method for measuring methanol concentration in flexible fuel

A technology of methanol concentration and measurement method, which is applied to material capacitors, combustion engines, internal combustion piston engines, etc., can solve the problems of low measurement accuracy and affect the measurement accuracy, to ensure resolution, avoid jitter, and reduce measurement errors. Effect

Pending Publication Date: 2022-07-12
北京合升众成科技有限公司
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Problems solved by technology

[0009] However, if the capacitance of the solution is to be measured, solution polarization, capacitance effects, temperature characteristics, etc. will all affect the accuracy of the measurement.
Therefore, the measurement accuracy of the above method is not high

Method used

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  • Method for measuring methanol concentration in flexible fuel
  • Method for measuring methanol concentration in flexible fuel
  • Method for measuring methanol concentration in flexible fuel

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Embodiment Construction

[0093] The present invention will be further described below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0094] A method for measuring methanol concentration in flexible fuels, comprising the steps of:

[0095] S1. Build a methanol concentration sensor, which includes an RC circuit, a capacitor part, and the capacitor part is placed in a methanol solution;

[0096] S2, the calibration experiment, including the following steps:

[0097] S201, configure methanol solution with concentration gradient of 0%, 10%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, and divide the temperature gradient into -30°C, -25°C , -20, -15℃, -10℃, -5℃, 0℃, 5℃, 10℃, 15℃, 20℃, 25℃, 30℃, 35℃, 40℃;

[0098] S202, apply an excitation voltage to the RC circuit, the threshold of the excitation voltage is V1, measure the same methanol concentration, the charging time at different temperatures, and form a two-dimensional data ...

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Abstract

The invention relates to a method for measuring methanol concentration in flexible fuel. The method comprises the following steps: calibrating, setting a plurality of thresholds, reducing electric field time influence and reducing temperature influence. The method has the advantages that the measuring range is large, polarization deviation of the solution is avoided, the measuring error is small, error data is avoided, and the measuring precision is high; the calibration environment is simplified; the calibration time is greatly shortened; the use of raw materials is saved; testers are prevented from being in contact with methanol for a long time;

Description

technical field [0001] The invention relates to the technical field of engine fuel control, in particular to a measurement method for measuring methanol concentration in flexible fuel. Background technique [0002] Flex-fuel (methanol-gasoline blends) vehicles can address national and social needs for energy security and diversification. In order to be able to use a variety of flexible fuels with different ratios (a blend of methanol, ethanol and gasoline), and to meet the increasingly stringent national emission standards for motor vehicle pollutants, this poses a severe challenge to engine control. test. [0003] There are many methods for detecting methanol concentration in the prior art, mainly including physical method and chemical method. For example, sensors based on methanol solution concentration, intensity, sound speed, light refraction, heat capacity, temperature rise and other phenomena; sensors designed according to the change law of the magic film resistance ...

Claims

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Application Information

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IPC IPC(8): G01N27/22
CPCG01N27/221G01N27/228Y02T10/30
Inventor 邓金滔周涛张怡蔚锐胡再权汪洋余元骏苟志鹏潘登熊新杨邵志腾
Owner 北京合升众成科技有限公司
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