On-board diagnostic device and diagnostic method for monitoring vehicle fuel evaporation leakage
A technology of on-board diagnosis and fuel evaporation system, which is applied in the field of on-board diagnostic devices, can solve problems such as the difficulty of troubleshooting leak points, and achieve the effects of saving energy, increasing safety, and streamlining and accurate algorithms
Active Publication Date: 2021-11-23
SUZHOU ENDUFA AUTOMOTIVE SYST CO LTD
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[0008] Purpose of the invention: Aiming at the deficiencies in the prior art, the present invention provides an on-board diagnostic device and diagnostic method for monitoring the leakage of automobile fuel evaporation; the present invention can monitor the leakage of the fuel evaporation system in real time, and improve the leakage of the fuel evaporation system. Accuracy of detection and solving technical problems that are difficult to troubleshoot leak points
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[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
[0050] Such as figure 1 As shown, an on-board diagnostic device for automotive fuel evaporation leakage monitoring, including a fuel tank 1, a carbon tank 2, a pressurization system 3, an ultrasonic sensor group 4, a pressure sensor group 5 and an electronic control module 6, the fuel tank 1 communicates with the carbon tank 2 through a pipeline, and the pressurization system 3 communicates with the inside of the fuel tank 1 through the carbon tank 2; the ultrasonic sensor group 4 is distributed on the outer surface of the fuel tank 1, and the pressure sensor group 5 is located on the fuel tank 1. In the pipeline between the canister 2 and the booster system 3 and the pipeline inside the booster system 3, the electronic control module 6 is respectively connected with the ...
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The invention discloses a vehicle-mounted diagnostic device and a diagnostic method for monitoring automobile fuel evaporation leakage, including a fuel tank, a carbon tank, a booster system, an ultrasonic sensor group, a pressure sensor group and an electric control module. The fuel tank passes through a pipeline It communicates with the carbon tank, and the pressurization system communicates with the inside of the fuel tank through the carbon tank; the ultrasonic sensor group is distributed on the outer surface of the fuel tank, the pressure sensor group is located in the pipeline of the fuel evaporation system, and the electronic control module is respectively It is connected with ultrasonic sensor group, pressure sensor group and pressurization system; the location and size of the leak hole can be quickly judged by the distance intersection algorithm of the sound intensity of the leak hole and the pressurization method. Beneficial effects: the present invention can timely judge whether there is a leakage problem in the fuel evaporation system, and judge the size and location of the leakage hole, and at the same time monitor whether the carbon tank is blocked and whether there is a problem with the sealing of the pipeline of the fuel evaporation system .
Description
technical field [0001] The invention relates to a vehicle-mounted diagnostic device and a diagnostic method, in particular to a vehicle-mounted diagnostic device and a diagnostic method for monitoring vehicle fuel evaporation leakage, and belongs to the technical field of oil and gas leakage detection. Background technique [0002] Vehicle fuel evaporative emissions are likely to cause environmental problems such as smog and photochemical pollution, which have a huge impact on human production and life. In order to prevent the pollution of the atmosphere by fuel vapor emissions, GB18352.6-2016 "Limits and Measurement Methods of Pollutant Emissions from Light Vehicles (China's Sixth Stage)" has stricter requirements on the leakage diagnosis of fuel evaporation systems, and requires on-board diagnostic systems. It can detect the leakage caused by small holes greater than or equal to 1mm in the fuel evaporation system (if the manufacturer requests, 0.5mm can also be used instea...
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IPC IPC(8): F02B77/08F02M25/08
CPCF02B77/08F02M25/08
Inventor 何仁董雪晴
Owner SUZHOU ENDUFA AUTOMOTIVE SYST CO LTD