Motor vehicle tail gas emission detection method and device

A technology for exhaust emissions and motor vehicles, which is applied in the direction of measuring devices, vehicle testing, and electronic control of exhaust treatment devices, etc. Problems such as low reliability of the results, to achieve the effect of improving effectiveness

Pending Publication Date: 2021-04-09
广东天琴信息技术有限公司
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Problems solved by technology

However, this detection method is to independently judge the emission indicators of each emission substance in the exhaust valve exhaust, whether the emission is qualified, and this detection method can only be used for exhaust detection after the motor vehicle enters the designated detection point within the statutory time. This instantaneous detection value is highly accidental, and the reliability of the detection result is not high.
Therefore, the exhaust gas detection method in the prior art cannot continuously detect the exhaust gas in real time, nor can it effectively and accurately and intuitively judge the pollution degree of the motor vehicle exhaust emission and whether the emission exceeds the standard

Method used

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  • Motor vehicle tail gas emission detection method and device
  • Motor vehicle tail gas emission detection method and device
  • Motor vehicle tail gas emission detection method and device

Examples

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no. 1 example

[0033] refer to figure 1 , a schematic flow chart of a motor vehicle exhaust emission detection method, including the following steps:

[0034] Step S101, collecting exhaust gas parameters of motor vehicle exhaust emissions according to a set frequency.

[0035] Receive exhaust data emitted by vehicles, including nitrogen oxide concentration, carbon monoxide concentration, black smoke concentration, light absorption coefficient and opacity.

[0036] The main pollutants emitted by automobiles are nitrogen oxides (NOx) and carbon monoxide (CO). Nitrogen oxides are brown, pungent-smelling exhaust gases produced in large quantities when the engine has a certain load. Carbon monoxide is a colorless, odorless gas produced in an internal combustion engine when there is insufficient air or other reasons for incomplete combustion.

[0037] Set the collection frequency, after receiving the vehicle exhaust emission data sent by the car, transmit the exhaust gas emitted by the car to th...

no. 2 example

[0050] see figure 2 , on the basis of the first embodiment of the present invention, preferably, the tail gas parameters also include the urea level:

[0051] Automobile urea solution is an essential additive for the SCR system of diesel engines. Through the selective catalytic reduction reaction of NOX products, it can be converted into nitrogen, oxygen, and water, thereby reducing the emission of nitrogen oxides.

[0052] If, on the basis of the first embodiment, the discharge standard is compounded according to any of the metering methods, when the urea liquid level does not change within a set period, for example, within one hour or the range of change is within the set range, Then it is judged that the current exhaust emission exceeds the standard.

[0053] According to the teaching of the above-mentioned embodiment, on the basis of the first embodiment, the judging condition of the urea liquid level is added to more effectively judge whether the exhaust emission index ...

no. 3 example

[0055] see image 3 , on the basis of the second embodiment of the present invention, the method further includes detecting changes in exhaust gas temperature:

[0056] If both the first embodiment and the second embodiment comply with emission standards, but the exhaust gas temperature is lower than the threshold value, such as below 30 degrees Celsius, then all the collected exhaust parameters will not be subjected to mean and weighted calculations.

[0057] According to the teaching of the above-mentioned embodiment, on the basis of the second embodiment, a judgment condition of temperature is added to more comprehensively and effectively judge whether the exhaust gas emission index is qualified.

[0058] Another embodiment of the present invention also provides a corresponding implementation device for the motor vehicle exhaust emission detection method, which further makes the method more practical. The implementation device provided by the embodiment of the present inven...

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Abstract

The invention discloses a motor vehicle tail gas emission detection method and device. The method comprises the steps of acquiring tail gas parameters of motor vehicle tail gas emission according to a set frequency, wherein the tail gas parameters comprise nitrogen oxide concentration, carbon monoxide concentration, black smoke concentration, light absorption coefficient and opaque degree; in a set period, taking respective average values of the tail gas parameters, and according to a set weight, carrying out weighted calculation on all the tail gas parameters to obtain a weighted result; and if the average value of any tail gas parameter or the weighting result is not within the set standard value range, judging that the current tail gas emission exceeds the standard. According to the embodiment, motor vehicle tail gas emission can be qualitatively and quantitatively detected, and the effectiveness of motor vehicle tail gas emission detection is improved.

Description

technical field [0001] The invention relates to the technical field of motor vehicle exhaust emission detection, in particular to a motor vehicle exhaust emission detection method and device. Background technique [0002] With the substantial increase in the number of private cars, various industry transport vehicles and public vehicles, the number of motor vehicles has increased sharply, and the impact on the atmospheric environment has become increasingly serious. Among them, motor vehicle exhaust emissions, one of the main pollution sources of the atmospheric environment, contain a variety of harmful substances. Therefore, the detection of motor vehicle exhaust emissions is the basis for targeted pollution prevention. At present, one of the conventional motor vehicle exhaust detection methods is to use a five-gas exhaust gas analyzer to detect engine exhaust emissions. However, this detection method is to independently judge the emission indicators of each emission subst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01M17/007F01N11/00
CPCG01N33/0032G01M17/007F01N11/00F01N2610/02F01N2570/14Y02T10/40
Inventor 史怀北
Owner 广东天琴信息技术有限公司
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