Before I tell you all the information that is generating the Diesel Particulate Filter, should look at recent history. A few years ago, fashion It was buying a Diesel car. At the end of the day, their engines longer sounded as before or vibes they had minimized. had also run out of time when Diesel They were considered "Percherons" of lackluster performance, which cost them a world revving up and could now run as the best cars with engines gasoline... even I had cars, and not a few, with benefits sports. Although the final hook was that, for a few euros more than it could cost the same car with petrol engine of similar power, diesel spends much less (Besides being cheaper than gasoline). Moreover, not only fill the tank out cheaper, but you could afford to go to the gas station with less often.
However, time they have changed. And yes, there are already models gasoline engines , hybrids including that they spend little or very little, there is even a legion of three-cylinder no longer remain just cars for the city and also consume little, are not harsh. As if this were not enough, turbocharger which it was previously exclusive to the Diesel-of all Diesel- or sporting versions is today present even in humble small engines utility, so that provision and, above all, when you play move with the engine a few laps, has gained much against atmospheric engines. And if all this were not enough, the liter gasoline leaves practically price of one of diesel oil. Furthermore, a gasoline car remains cheaper at the time of purchase-and, of course, also in other aspects such as sure- than equivalent Diesel: in some cases, even with not always make amortizable based kilometers and kilometers differences.
But although all this may be important, there one reason why you should think seriously buy a Diesel instead of a gasoline-powered car: it has an element that can give you many headaches as maintenance costs very expensive.
Its about particulate filter, an "invisible" element that apparently contributes little to the car that has it: does not help or comfort, or the performance or driveability, does not make the car spend less, not seen and not noticed ... until what it breaks. then It is very expensive: Think, in some cases, replace it accounts for almost 10 percent of the cost of the car itself, which is what happens with the cheapest diesel.
Why particulate filters fail?
The problem may arise when the self-diagnosis of the system confirms what It has not been done burning particle. This situation drivers who usually circulate with your car Diesel presents low load the engine and low revs. Moreover if this situation combined with cold starts Y frequent stops: Profile, ultimately, motoring in city with short journeys. In these cases, the particulate filter can once near saturated particle, not being able to cause such regeneration may occur automatically in other circumstances. Then it becomes clogged and the problems begin: the engine is in failure mode, not usually move from 2000 rpm and the maximum speed is limited to about 100 km / h.
But what good is the particulate filter carrying the Diesel?
Car builders are bound by the rules of pollutant emissions their cars embodying a exhaust element retaining particles solid generated by the engine to not go outside. They are composed of carbon deposits from the lubricant ...
East strainer (the particulate filter can be defined as such) Helps existing Diesel not exceed 0.005 g / km, ie almost zero. The fact is that, since 2011, all cars sold as new must bring this element that prevents the particles out into the atmosphere, as they are harmful to the health of those who breathe, and contribute to the greenhouse effect.
Their presence is not only an element that contributes to increasing the price of the car, but also may fail and do maintenance costs grow. Therefore it is essential to know whether or not we need to choose a diesel car that unfailingly mount it today, or if we chose that option, how to drive to the particulate filter in good condition lasts as long as possible.
How does particulate filter work?
A particulate filter is comprised of cell Porous elements Silicium carbide, impregnated with platinum and palladium. These cells let through the exhaust gas obviously have been or can also be treated by other elements of car exhaust (catalyst or NOx trap catalyst of selective reduction SCR), but not to the particles.
These They are stored at filter and two pressure sensors, one at the entrance and another at the exit of it, are what determine at what point it is close to fill them.
When the computer that protects the filter receives this information, proceed to temperature increase gases issued by the engine even with a extra shot fuel, as in the case of D-4D Toyota or 1.5 dCi Renault-Nissan- and burn, thus it is able to remove some of the waste that the exhaust oxidation. Obviously, not all, and that is the reason why the particulate filter, but always work properly, It has a finite lifeThere will be a point where increasingly fewer particles process and even that can not do it anymore because it is full.
How long will the particulate filters?
That is a question that is difficult to give a precise answer, but no less than 60,000 km; but typically it would speak twice kilometers, about 120,000 km; and in some cases, up to four times: 250.000 km Fiat confirmed in some of its models.
The point is to get as longevo becomes necessary that some conditions are met in the chemical laboratory in the exhaust. For example, it takes circular, occasionally, for expressways. This makes it easier to be achieved Gas temperatures exhaust around 600: That is the reason why manufacturers try to ensure that filters are as close to the engine, to take advantage of that, at its output, the exhaust gases is when they are warmer.
There particulate filter, however, is necessary to position further from the engine and, in some cases, manufacturers use filters using additives to facilitate the burning of the trapped particles. These additives reduce the temperature required about 500 and regeneration can be done more often: for example, reports that Volkswagen instead of every 1,000-1,200 km; They do every 500-600 km. Obviously, the operation goes unnoticed by the driver.
How the breakdown of a particulate filter is arranged?
In these circumstances, it is desirable, following the instructions usually appear in the instructions of the car, Hit the Road for the filter to achieve optimum burning temperature of the particles. Regeneration typically requires high rpm (Above 3000 rpm) and constant speed for a while, usually, about 15 minutes.
If we could do that use the car or even even so the regeneration filter does not occur, we find that the indications of the instrument box insist we visit the workshop, either to force a there regeneration and if not possible, repair the filter or replace.
Before doing so, in some cases it can be useful aditivar fuel to facilitate burning particles. using these liquids organic-metal components that may be found in stations or stores parts (cost between 15 and 20 euros), it is possible reducing the temperature necessary to facilitate regeneration of the filter.
How much repairs diesel particulate filter?
However, it also may not be enough, nor the forced regeneration workshop: a relatively inexpensive operation costs between 100 and 200 euros. If so, then the first goal would be cleaning or repair.
Cleaning can be done in various ways. One of the most common is through a team ultrasonic cleaning, working with immersion of the part in water and use of detergent chemicals, so that cleaning occurs once starts the ultrasound transducer generates vibrations that clean the inside. It is possible to make this operation 200 euros.
Another way passes clean without dismounting, dissolving dirt with a specific detergent, an operation that is solved in just one hour.
In some cases, it can also repair the filter while maintaining the housing. In this case what is done is replace the internal cells. It may cost more than double the first operation, a 500 euros; but guaranteed to have the filter as if new.
Of course, it can also be replaced entirely, a situation which, depending on the manufacturer, can cost no less than 1,000-1,500 euros (Slightly less if it is not the original) and in some cases even more than doubled to over 3,000 euros.
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