Photo of automobile oil-water separator: working principle
After the jet fuel enters the filter separator, it begins to gather in the aluminum plate, and then it is dispersed into the coalescence filter element from the inside out. Step one, the filter layer filters out solid impurities; Step 2, separating emulsified oil and water through a demulsifying layer; In the third step, tiny water droplets are gathered into large water droplets by the coalescence layer and deposited in the water collecting basin. Then, the small water droplets that do not coalesce in time are further separated and precipitated in the sedimentation tank through the hydrophobic effect of the separation filter element, and discharged through the drainage valve. Clean fuel is collected in the auxiliary tray through the separation filter element and discharged from the outlet of the filter separator.
Automobile oil-water separator picture: function
Automobile oil-water separator is a kind of fuel filter, and its key function is to remove water from fuel, thus reducing injector failures and prolonging engine service life. Its key principle is a separator that removes impurities and water according to the density difference between water and fuel oil by using the principle of gravity settlement. There are also separation elements such as diffusion cone and filter screen inside. The oil-water separator also has other functions, such as preheating fuel to avoid wax deposition and filtering impurities.
From the separation principle, it can be divided into membrane filtration oil-water separator, oil-water separator using lipophilic substances, unpowered oil-water separator with different specific gravity and emulsified oil-water separator with pharmacological effect. Oil-water separators are widely used in petrochemical industry, automobile industry, sewage treatment and other industries.
Photo of automobile oil-water separator: failure phenomenon of automobile oil-water separator
1. Differential oil leakage:
Most oil spills occurred in vehicles before 2004. The key point is that the water entering the differential affects the gear rust, damages the double-sided oil seal and affects the oil leakage. If oil leakage is found in the differential, the double-sided oil seal should be replaced immediately to improve the oil leakage, otherwise the differential will be burned out.
2.2.8LA6 rudely shifted gears without S-gear, and began to shrug:
This problem is mostly caused by the wear of the slide valve in the valve body, which needs to be repaired or replaced.
3.2.8LA6 can't start in S-gear reverse gear and forward gear, and can't accelerate quickly at low speed in forward gear:
The fault may be caused by valve body, oil pump or several positive and negative oil components indicated by computer.
4. After 2003, the 2.4L of S-block A6 often appears irregular flashing (10- 15000 km is easy to appear), which can't work normally in severe cases. After restarting, the fault disappears, and the fault code is 17090 (the signal of multifunction switch F 125 is unknown):
This fault can detect whether there are iron chips in the four Hall sensors and the corresponding magnets, otherwise it can be solved by replacing the computer.
5. After 2003, 2.4L and 2.8LA6 with S gears often hit:
The key reason is that the working oil pressure of forward clutch is unstable, KSV valve is worn, and most valve bodies can be repaired or replaced.
6. When idling in P/N gear, there is a sound of liquid flowing in the gearbox:
This phenomenon is mostly due to the blockage of the cooling pipe or the failure of the valve body.
7. Engage the forward gear when idling (ramp parking failure):
The problem can be judged by reading the data stream of clutch working pressure and contact pressure. Most problems are basically caused by excessive wear clearance of forward clutch. Repair or replace the input shaft assembly.
8. When driving, lift the accelerator. When the speed drops to 30 km/h, the car will stir forward:
The key reason for this failure is that the main matching parameters of the engine and gearbox are in doubt, and the engine adjustment unit needs to be upgraded (since 2005, the maintenance station has been equipped with an upgrade CD).
9. Step on the brakes and shrug your shoulders. In severe cases, there will be no refueling:
When CVT is placed in Tiptronic gear, the above fault phenomenon disappears, and at the same time, 18 18 1 fault code appears; Or analyze the wear and seizure of the clutch pressure regulating valve in the valve body.
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