Fuel coarse filter: characteristic, device, resource
As is known, the fuel system of moderncars are very fastidious to the quality of fuel. And it concerns not only the octane number, but also it is banal of its purity. After all, dirty fuel can significantly damage the engine of the car. Therefore, in order to prevent a sudden breakdown, the machine has a coarse fuel filter. "Kamaz" is also equipped with them. What is this element? How often do I change the fuel filter? About all this and not only further in our article.
Characteristic
This element serves to clean fuel from large particles of dirt and other deposits. After all, if all this goes further to the plungers and nozzles, they will quickly wear out. Fine dust acts as an abrasive.
On which cars is installed?
In most cases, such a notion as a filtercoarse fuel cleaning, is found on diesel engines. Many mistakenly think that these cleaning elements are installed only on cars with diesel power system. But this is not so. A coarse filter is also available on gasoline vehicles. But there are some differences. Which ones, we will consider further.
What are the differences?
As is known, the car power supply system has several degrees of filtration:
- preliminary (rough);
- main (thin).
If we look at gasoline cars, thenThe coarse element is installed together with the fuel pump. It is submersible and installed in a tank. Previously, in carburetor vehicles, this element was in the engine compartment, because the pump was mechanical. As for diesel engines, this filter is located separately from the tank and has its own housing. On gasoline cars with an injector power system (which is now the majority), it's just a mesh, put on the pump.
The device, the principle of operation
With petrol elements, everything is much simpler. The entire filter is a two-part grid that is put on the tip of the pump. Passing through it, gasoline is cleaned of dirt and other large impurities. But with diesel engines things are more complicated. Such a coarse filter consists of a metal casing. To it the glass-sediment bowl on bolts is fastened. Also in the design there is a gasket. On the hollow core of the glass is the filter element itself. It can be made of aluminum or brass plates and be pressed against the body on a rack with a spring. Each of the plates has small protrusions with holes for the passage of fuel. Thus, inside the cleaning element, crevices are formed, through which fuel enters the injection pump. And all the dirt with water falls into a glass-settler. At the bottom of the element there is a special valve for draining the sludge. It should be periodically opened. Usually a dark liquid with impurities of water merges therefrom.
About the resource
Many motorists are wondering howoften change the fuel filter. There is no single answer to this question. As for diesel vehicles, the life of the element is about 80 thousand kilometers. Much more often it is necessary to change the fine filter - once every 10 thousand. For petrol engines, the figure is even higher. For fine-cleaning elements this is 40 thousand, for rough - up to 100.
Signs of replacement
Determine whether a car needs a filter changerough cleaning of fuel, it is possible by characteristic features. So, with a clogged element, the fuel will not fully flow into the cylinders. This means that the car will jerk on the move, power will be lost.
Conclusion
So, we found out how the structures work and workfuel coarse filters. As you can see, this is quite an important component in the fuel system of any car. In order not to experience problems with starting the engine and other troubles, you need to monitor its condition and periodically change the consumables. We also note that there are many fakes on the market. Therefore, if you see the famous brand at a cheap price, do not buy such a product. Judging by the reviews, the resource of such elements is 3 times lower than the declared value.
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