Vehicle-mounted diagnosis device and diagnosis method for automobile fuel evaporation leakage monitoring
A technology of on-board diagnosis and fuel evaporation system, which is applied in the field of on-board diagnostic devices, and can solve problems such as difficulty in checking leak points
Active Publication Date: 2021-01-15
苏州恩都法汽车系统股份有限公司
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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 diagnosis device and diagnosis method for automobile fuel evaporation leakage monitoring. The device comprises a fuel tank, a carbon canister, a pressurization system, an ultrasonic sensor group, a pressure sensor group, and an electric control module; the fuel tank is communicated with the carbon canister through a pipeline; the pressurization system is communicated with the interior of the fuel tank through the carbon canister; the ultrasonic sensor group is distributed on the outer surface of the fuel tank; the pressure sensor group is located in apipeline of a fuel evaporation system; the electric control module is connected with the ultrasonic sensor group, the pressure sensor group and the pressurization system; and the position and the sizeof a leakage hole are quickly judged by adopting a distance intersection algorithm and a pressurization method of the sound intensity of the leakage hole. The vehicle-mounted diagnosis device and thediagnosis method have the beneficial effects that whether the fuel evaporation system has the leakage problem or not can be judged in time, the size and the position of the leakage hole can be judged, and meanwhile whether the carbon canister is blocked or not and whether the sealing performance of the pipeline of the fuel evaporation system has the problem or not can be monitored.
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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Login to View More IPC IPC(8): F02B77/08F02M25/08
CPCF02B77/08F02M25/08
Inventor 何仁董雪晴
Owner 苏州恩都法汽车系统股份有限公司