Water drainage method for fuel filter

Abstract

The invention discloses a water drainage method for a fuel filter. The water drainage method comprises the first step of vehicle-mounted ECU powering on, the second step of high water level judgment,the third step of engine state judgment and the fourth step of water drainage. In the water drainage method, a vehicle-mounted ECU can detect the signal of the water level in a water collection cavityof the fuel filter through a water level sensor, when the water level is higher than the preset high water level, flashing prompt information is displayed on a central control screen, a worker is prompted to drive a vehicle to the proper position in time to drain water, the worker does not need to observe the water level in the fuel filter, the worker does not need to directly operate a water drainage valve, timely water drainage is guaranteed, the labor intensity of workers is reduced, the environment pollution problem and the back vehicle slip problem brought by water drainage are avoided,and the danger brought by engine starting in the water drainage process is avoided.

Description

technical field [0001] The invention relates to the technical field of motor vehicles, in particular to a method for draining water from a fuel filter for motor vehicles. Background technique [0002] The fuel filter has a water collecting cavity, and the water collecting cavity is connected with a drain valve. When the motor vehicle is in use, the fuel filter keeps filtering the fuel, and the moisture in the fuel is concentrated in the water collection chamber. When the water in the water collection chamber exceeds a predetermined water level, it is necessary to open the water release valve to discharge the water. [0003] Existing motor vehicles do not have the function of automatically draining water from the fuel filter. It is necessary to manually observe the water level and manually open the drain valve to drain the water; this cannot avoid the phenomenon that the water is not drained in time, which will have a negative impact on the normal operation of the fuel system...

AI Technical Summary

Problems solved by technology

Some researchers did not realize the hazards caused by the engine running when the water is released. Although some researchers realized that the engine operation would bring negative effects when the water was released, they only realized that the engine operation would lead to the failure of normal water release.

When the engine works when the water is released, a large amount of air will enter the oil circuit of the motor vehicle, causing the engine to shut down, and after the engine is turned off, the air in the oil circuit cannot be ignited, so it cannot be ignited again

[0006] 2. No researchers have considered that the engine may start during the process of releasing water

[0007] In the process of draining water, once the engine starts, it will cause the engine to stall, and after the flameout, because the air in the oil circuit cannot be ignited, it cannot be ignited again, and only the oil circuit of the motor vehicle can be repaired

[0008] Do not consider engine re-ignition during the water release process, it will cause serious hazards

If the engine of the motor vehicle is restarted during the process of discharging water on the expressway, it will cause the failure of the motor vehicle to ignite on the expressway, which will bring harm to road safety and normal driving.

[0009] 3. No researcher has considered the environmental impact of water release. When the water is automatically released, the position of the water release cannot be controlled. Where the water discharge conditions are met, the water will be released there; this will cause environmental protection problems caused by the automatic water release.

[0010] Since the water in the sump chamber of the fuel filter contains oil, it is not easy to clean up after the water is discharged to the ground

If it is discharged on the road, it will make the road difficult to clean and may cause the dangerous situation of the vehicle behind it slipping; if it is discharged into the soil, it will make the land where it is discharged unsuitable for agricultural planting

If the water released by the fuel filter flows into the water body, it will cause aquaculture loss (such as the death of farmed fish and other organisms)

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