Remote monitoring and optimizing method for fuel evaporation leakage of gasoline vehicle

A technology of remote monitoring and optimization method, applied in design optimization/simulation, fluid tightness test, machine/structural component test, etc. It can solve the problem of poor data robustness, limited collected data, and increased after-sales problems. Probability and maintenance costs, etc., to achieve the effect of reducing labor and material costs and improving robustness

Active Publication Date: 2021-01-29
JIANGLING MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some difficulties may be encountered in the development process of fuel evaporation leakage diagnosis monitoring calibration, such as different vehicle dispersion, fuel tank vacuum pressure decay gradient performance may be different, and due to the test vehicle and human resource costs and development cycle issues , it is impossible to fully take into account the differences of each working point and each vehicle. Sometimes after-sales often finds that 1mm leakage faults are reported, causing customers to complain. The reason may be either a hardware problem in the fuel evaporation system or fuel leakage diagnosis. The robustness of the development data is not good, and the 1mm leakage fault is falsely reported
[0004] A

Method used

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  • Remote monitoring and optimizing method for fuel evaporation leakage of gasoline vehicle
  • Remote monitoring and optimizing method for fuel evaporation leakage of gasoline vehicle
  • Remote monitoring and optimizing method for fuel evaporation leakage of gasoline vehicle

Examples

Experimental program
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Example Embodiment

[0031] Example 1

[0032] see Image 6 , the remote monitoring and optimization method of gasoline vehicle fuel evaporation leakage of the present invention, the realization process is as follows:

[0033]1) Use the remote acquisition system to transmit the attenuation gradient value of the fuel tank vacuum pressure calculated by the ECU to the cloud server through the 4G / 5G / WIFI network, and use the model built by Simulink on the cloud server to determine the vacuum pressure of the vehicle at different fuel levels Statistical attenuation gradient values ​​are generated to generate corresponding statistical charts of vacuum pressure attenuation gradients;

[0034] 2) Perform normalized dimensionless parameter processing to generate a normalized dimensionless parameter statistical graph. The normalized parameter value is the ratio of the value of the vacuum pressure decay gradient to the fault threshold. If the normalized parameter is greater than or equal to 1, the correspon...

Example Embodiment

[0036] Example 2

[0037] The remote monitoring and optimization method of gasoline vehicle fuel evaporation leakage in this embodiment is different from Embodiment 1 in that further, according to the leakage diagnosis fault on the cloud server, find out some abnormal points with poor robustness, and call And analyze the operating parameters of the car when the abnormal point occurs, find out the root cause of the abnormal occurrence in time, and optimize the fuel leakage diagnosis and development data online through the cloud. When the robustness data of some working conditions is found to be abnormal, the fuel leakage diagnosis and calibration parameters under the working conditions are directly optimized online in real time on the cloud server and updated to the vehicle ECU. The ECU data is optimized and updated until the engineering goal is achieved.

[0038] The remote monitoring and optimization method for fuel evaporation and leakage of gasoline vehicles can clearly se...

Example Embodiment

[0039] Example 3

[0040] The remote monitoring and optimization method of gasoline vehicle fuel evaporation leakage in this embodiment is as follows:

[0041] 1. Fuel evaporation system

[0042] fuel evaporation system figure 1 As shown, it is mainly composed of fuel tank, carbon tank, carbon tank solenoid valve, carbon tank ventilation valve and corresponding pipelines. Since gasoline is easy to evaporate, the evaporated oil vapor will fill the fuel tank and corresponding evaporation system pipelines. If the entire fuel tank If the evaporation system is not well sealed and leaks, the oil vapor will easily leak into the atmosphere and pollute the environment. The National VI regulations for light vehicles require the detection of leakage faults larger than 1mm.

[0043] 2. Diagnosis principle of fuel evaporation system:

[0044] When the diagnostic conditions are satisfied, close the canister ventilation valve, open the canister solenoid valve, pump the pressure in the fue...

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Abstract

The invention relates to a fuel evaporation leakage monitoring method. The invention relates to a remote monitoring and optimizing method for fuel evaporation leakage of a gasoline vehicle, which comprises the following steps of: transmitting a fuel tank vacuum pressure attenuation gradient value calculated by an ECU (Electronic Control Unit) to a cloud server by using a remote acquisition system,and counting the vacuum pressure attenuation gradient values of the vehicle at different fuel liquid levels by using a model built on the cloud server; generating a corresponding vacuum pressure attenuation gradient statistical graph; carrying out normalization dimensionless parameter processing, generating a normalization dimensionless parameter statistical graph, wherein the normalized parameter value is the ratio of the vacuum pressure attenuation gradient value to the fault threshold value; and if the normalization parameter is larger than or equal to 1, reporting the corresponding leakage fault. Certain abnormal points with poor robustness are found out according to leakage diagnosis faults on a cloud server, the root cause of abnormality is found out in time by calling and analyzingrunning parameters of the automobile at the moment when the abnormal points occur, and online optimization is conducted on fuel leakage diagnosis development data through the cloud.

Description

technical field [0001] The invention relates to a method for monitoring fuel evaporation leakage, in particular to a remote monitoring method for fuel evaporation leakage of National VI gasoline vehicles. Background technique [0002] In recent years, the country has paid more and more attention to environmental protection, advocated the "blue sky defense war", and put forward higher and higher requirements for the emission of light-duty gasoline engines. At present, the National VI standard for light-duty gasoline engines has also been issued. It is getting higher and higher. The National VI standard has added a number of monitoring requirements on the basis of the National V standard. One of them is evaporative emission monitoring. The purpose is to prevent the gasoline in the fuel evaporation system from leaking into the atmosphere and pollute the environment. The current National VI regulations require When the failure of the fuel evaporation system exceeds 1mm (some cou...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F30/15G01M3/32
CPCG06F30/20G06F30/15G01M3/3272
Inventor 刘凯叶露万川
Owner JIANGLING MOTORS
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