Car performance detecting method and car comprehensive performance evaluating method

A detection method and technology for automobiles, which are applied in the field of comprehensive performance evaluation of automobiles and automobile performance detection, can solve the problems of inaccurate detection of automobile environmental protection performance, and achieve the effects of improving accuracy, accurate exhaust gas data, and direct data sources.

Active Publication Date: 2017-01-25
汪林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to improve the inaccurate detection of automobile environmental protection performance existing in the prior art, and provide a method of a

Method used

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  • Car performance detecting method and car comprehensive performance evaluating method
  • Car performance detecting method and car comprehensive performance evaluating method
  • Car performance detecting method and car comprehensive performance evaluating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 The flow chart of the automobile performance testing method provided by Embodiment 1 of the present invention is shown. see figure 1 , the automobile performance detection method provided in the present embodiment, comprises:

[0043] Step S101 , when the tested vehicle is running, the temperature of the catalytic device of the tested vehicle is collected.

[0044] To collect the temperature of the catalytic device, you need to use a thermometer. For cars without temperature data, you need to add a thermometer to the car under test, so as to collect the temperature of the catalytic device; for cars with temperature data, Then read the temperature data directly from the car OBD system.

[0045] Preferably, the temperature of the catalytic device of the tested vehicle is collected when the tested vehicle is running at an acceleration (eg, 0-40km / h). In the state of accelerated operation, the CO, HC, and NO in the exhaust gas X Therefore, the temperature of t...

Embodiment approach

[0055] Whether the difference of the harmful gas content obtained under the two ways is greater than the preset value can be implemented in various ways. For example, under the two ways, it is judged whether the content difference of each harmful gas in the tail gas is greater than preset value, as long as there is a difference in the content of a harmful gas greater than the preset value, it is determined that the difference in the obtained harmful gas content is greater than the preset value; It is judged that the difference of the obtained harmful gas content is greater than the preset value only if the difference values ​​are greater than the preset value.

[0056] In general, the data read from the OBD system is relatively real data, but a small number of unscrupulous merchants may install cheating software in the OBD system, making the data read from the OBD system untrue. The content of harmful gases in the exhaust gas obtained by the two methods is inconsistent, that i...

Embodiment 2

[0063] figure 2 Another automobile performance detection method provided by the embodiment of the present invention is shown. see figure 2 , the automobile performance detection method that the present embodiment provides, comprises:

[0064] Step S201 , when the tested vehicle is running at an accelerated speed and the temperature of the catalytic device of the tested vehicle is below 300° C., the content of harmful gases contained in the exhaust gas is obtained through the exhaust gas detection device.

[0065] Step S202, during the process of decelerating the measured vehicle from a preset speed (such as 50km / h or 100km / h) to zero speed, using a pressure sensor to collect the pedal pressure applied by the user to the pedal, and from the pedal pressure When the first preset pressure value is reached, that is, the moment when the braking force starts to work, the detection device obtains the first test data from the OBD system of the car under test until the speed of the ...

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Abstract

The invention relates to a car performance detecting method and a car comprehensive performance evaluating method. The car performance detecting method includes: collecting the temperature of the catalyzing device of a to-be-detected car when the to-be-detected car is in an operating state; acquiring tail gas data from the OBD system of the to-be-detected car before the temperature of the catalyzing device reaches preset temperature; analyzing the harmful gas content in tail gas according to the tail gas data. The car performance detecting method has the advantages that the tail gas data of the to-be-detected car is obtained through detecting before the temperature of the catalyzing device of the to-be-detected car reaches the preset temperature, the problem that gas such as CO in the tail gas is decomposed at high temperature after the catalyzing device treatment in an existing detecting method and the authenticity of the detecting data is affected can be avoided, and the detected tail gas data is accurate and real. The car comprehensive performance evaluating method has the advantages that the method uses American lemon law as reference, a mathematical model is used to comprehensively consider aspects such as environment protection performance, safety performance, economy and power performance, and the evaluation is objective and real.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an automobile performance detection method and an automobile comprehensive performance evaluation method. Background technique [0002] Usually, car performance mainly includes safety (braking performance), power performance, environmental protection, and fuel economy. Car performance is an important factor in evaluating the quality of a car. Therefore, car performance testing is very important, especially for second-hand cars. Performance testing, because performance determines the price. [0003] In 2015, the transaction volume of used cars was about 9.4 million, nearly double the 5.2 million in 2013. Such a high growth rate shows that the potential value of the market is huge. With the adjustment of policies and the implementation of the Eight National Articles, such as the abolition of restrictions on relocation, reduction of taxes and fees, and standardization of transa...

Claims

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Application Information

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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 汪林熊发兴汪学友龙刚张晓圣曹军汪科宇程红洁梁扬明
Owner 汪林
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