The water removal mode of the diesel filtration system is mainly precipitation. Either set a precipitation chamber in the lower part of the filter or use a special precipitator. Whether it is the sedimentation chamber in the lower part of the filter or the special precipitator, there is a drain valve. When the water accumulates to a certain amount, the valve is released and released, also called the oil-water separator.
The oil-water separator is a kind of fuel filter. The main function is to remove the moisture in the diesel oil to reduce the injector failure and prolong the service life of the engine.
The principle is mainly based on the density difference between water and fuel, using the principle of gravity sedimentation to remove impurities and water separator, and there are separate components such as diffusion cone and filter. The oil-water separator has other functions, such as pre-heating the fuel to prevent waxing and filtering impurities.
The benefits of oil and water separation
The quality requirements of diesel engines for high-pressure common-rail engines are also higher, because high-pressure injectors require precise control of injection pressure, injection time and fuel injection volume, so the workmanship is required to be more delicate.
If there is water or impurities in the diesel oil that are not cleaned, it will cause strain on the plunger coupler in the injector until the injector is stuck. Damage to the injector can cause unstable acceleration or acceleration of the engine, or discharge of black smoke and other faults, affecting the normal operation of the vehicle.
As the first stage of the multi-stage filter system, the primary fuel filter has the function of filtering out large particles of impurities and moisture. According to the requirements of many countries, the water separation efficiency of the filter is required to reach 95%, but many strainers do not achieve such filtration effect, and the engine will be damaged over time.
In order to allow the engine to “drink” clean diesel, only a “secondary processing” of those oils that do not meet the standard is required. Adding a water separator is the easiest and most practical method. ,
Select the oil water separator precautions
1, buy regular manufacturers products
The market price of oil-water separators ranges from a few hundred to several thousand. The quality difference is relatively large. There are also some counterfeit and shoddy products. If you buy cheap inferior products, the final price may be a whole set of fuel injectors or even an engine. Therefore, when you buy a water separator, you must go to a regular repair station to buy mainstream big brand products.
2, choose a large displacement
If the oil-water separator is installed, in order to ensure the fuel supply of the entire engine system, the installed oil-water separator model must be larger than the original vehicle’s own displacement.
3, the cold zone is selected with heating function
The cold weather is also easy to cause damage to the water under the water cup. Many users put a thick “cotton coat” on the oil-water separator in order to prevent the water-water separator from being damaged. However, for safety reasons, it is recommended. Oil-water separator with electric heating function.
If you do not pay attention to the technical maintenance of the diesel engine fuel supply system, no matter which part of the fault occurs, it will lead to poor oil supply or the engine can not start normally, and there will be symptoms such as decreased power, increased fuel consumption and black smoke. Therefore, maintaining the diesel filter can effectively reduce the damage of the diesel engine to the engine.
Post time: Nov-06-2019