Details created 10/08/2013 14:35
If you have any feeling that the thrust in the car disappeared - most likely became a faulty turbocharger.
Also the reason for checking the turbocharger on breakdowns can be a foreign whistling coming from the turbine. Of course, many experienced motorists prefer to check on their own, but still it is recommended to use the services of professionals.
How do you check the turbine?
In specialized service centers In order to determine the turbine breakdown, the scanner is connected to a specially designed connector. The reason for the disconnection of the turbocharger can be the pressure sensor of the injected air or the development of the turbine of its resource. In order to determine the pressure of the turbine, it is necessary to connect a special device with a manometer to its output. After receiving the indicators, it will be possible to determine the need to replace the turbocharger or turbine repair.
Causes of the Diesel Motor Turbine Fault
Cause of malfunction diesel turbine lies in the ejection of blue exhaust smoke During the acceleration of the car, and with constant revolutions - its disappearance. In turn, this is due to the combustion of the oil in the motor cylinders, which falls there due to leakage in the turbocharger.
Also, the signal of a faulty turbocharger control system will serve as black smoke, which appears when combustion of the enriched mixture due to air leakage in the pumping highways.
In turn, white exhaust gases indicate that the drain oil pipeline of the turbocharger is clogged. Another reason can be a clocking of the turbocharger case. The dynamics of acceleration of the car can become much worse due to lack of air intake from a faulty turbocharger.
Turbine whistle on diesel
If you hear a constant noise, whistling or howl during engine operation - the cause of this can be air leakage at the junction of the motor input and compressor. If you can hear the grinding or you will see cracks and damage to the turbine housing - get ready for the fact that the turbocharger will stop working at all.
A warning!
Most modern machines There are such automation systems that are able to immediately turn off the turbine in case of detection of malfunctions of at least one of their system components. And this, of course, will affect the ability to develop maximum power engine.
Modern cars are often equipped with a turbocharger - so you can significantly increase the power and characteristics of even low-power and low-pass motors. As is known, no engine can normally work without a certain amount of air. To burn in combustion chambers one liter of fuel, you need at least 11 thousand liters of oxygen. But in order for the air to be falling into the cylinders, it must pass through the filters, the intake manifold, bypass throttle valve And then get into the gap of the saddle and the valve itself. The need for motor in the air is never fully satisfied. The turbocharger gives air acceleration and injected it into the combustion chamber. During operation, the turbine can make sounds. Many car owners is alarming. Let's find out how this knot is arranged, whether a turbine whistle is dangerous on a diesel engine during acceleration, and what it says about.
About creating turbines
Most of the car owners are seriously confident that turbosters are a relatively recent invention. It is believed that they appeared in the second half of the 20th century, when turbocompressors were equipped with almost all models of German car industry. But it is not so.
The date of birth of the turbomotor is considered to be 1911. It was then that the American engineer Alfred Bureh managed to get a patent for industrial production of a device that allows several times to increase the power and specifications ordinary motors.
But with all the effectiveness of these first turbines, they had bulky sizes and increased the weight of the engine many times. Turbocharging development for passenger cars stopped, but on cargo transport Turbines were used very actively. In the US, the automakers did not hurry to industrially install the boost. Then (however, as now) there was a bid on bulk atmospheric power units. There is even a saying "Nothing will replace the volume."
In Europe, the fuel treated more economically than in the United States. In addition, in the 20th century, Europe felt the fuel crisis. Automakers began to reduce the volume of motors, increasing the power. This helped the supervision system. The technology has been improved, the structural elements became easier. However, among the shortcomings was still high flow Fuel - turbocharging among ordinary car owners did not find popularity.
Element in diesel engine
As you know, the diesel engine was designed in 1893. After time, its design was refined, many details were subjected to multiple changes and modifications. Engineers worked on feeding methods fuel mixes, as well as above its balance. The engineers then developed a turbine designed to increase the performance and characteristics of the unit's work due to a more complete combustion of fuel in the cylinders. This process is based on air compression in internal system - This allowed to increase the density of the air supplied. So the mixture was combed completely, and less harmful emissions were thrown into the atmosphere.
There are turbines low pressure and high. High superior devices are characterized by greater efficiency, as well as complex design.
Design
A modern turbocharger is a device consisting of the following components. These are two casing, each of which is equipped with a compressor and turbine. These housings are made of heat-resistant cast iron alloys. The turbine is equipped with a special wheel - it also has a resistance to high temperatures.
The principle of operation of the turbocharger
The algorithm of work is as follows. Combustion products, which are derived from the exhaust manifold, go to the receiving pipe of the turbocharger. Then they pass through the turbine housing - the channel in the case has a variable cross section. Exhaust gases as they move along the channel increase their speed and affect the turbine wheel - it rotates under this effect. The number of turbine rotor rotor depends on the set of factors. average speed Rotation is 1500 rpm.
Air outside passing through air filters, thoroughly cleaned from impurities and in a compressed form will fall into the intake manifold. Then the channel closes. The mixture is additionally compressed and flammified. Next opens the exhaust manifold. An intercooler is installed at the inlet in the combustion chamber.
It is necessary for cooling hot air coming from the turbocharger. So the density increases and the volume of oxygen is reduced. A larger amount of air is getting into the cylinder, which after mixing with the fuel will burn more efficiently. Due to this, power is growing significantly and the fuel consumption is reduced.
If the turbine witnessed
In the process of work through it a huge amount of air passes, which is then mixed with flammable, increasing the weight of the mixture. Oxygen is injected under high pressure - a whistle can be present under the hood, both at idle and when driving. One of the reasons is a violation of the tightness of the system.
These sounds can be alert. But you should not immediately go to the diagnosis in a hundred. You can try to eliminate the problem yourself. First of all, experts recommend checking each air nozzle in the engine for tightness. Often, when a turbine whistle appears on a diesel engine when overclocking, there is an extra air seats. To eliminate the problem, it is enough to replace the seals, tighten the clamps and fasteners.
In the case of wear of nozzles, they are changed to new ones. They are not subject to repair, and it is not recommended to put applications.
If the system is sealed, and the whistle is still heard, then it is necessary to carry out a deeper diagnosis, because the turbine is a very important technical element that should work stably. Many people do not know, but a small whistle of the turbine on a diesel engine during acceleration is the usual thing. But if the device is roaring, then this is already associated with problems.
How whistles turbine?
Often, the compressors make these sounds when the revolutions range ranging from 1.5 to 2.5 thousand revolutions. It does not matter how sharply start accelerated. Whistle will still occur. Sounds do not stop, even if the turns fall. In this case, the characteristics of the engine do not change. Just the amount of air passing through the turbocharger passes through special holes, which over time has lost the form. As a result, the driver hears from open space Nasty air whistling during acceleration.
Light whistling sounds can be observed even on new turbines. But it quickly passes. And after a while, if the device is properly, only the sounds of the motor operation are heard. If the turbine whistles, and the speed drops, the hose should be replaced, which connects it with the intercooler. Sometimes the air heat exchanger itself can be to blame. If a whistle appeared during acceleration, similar to the punched intercooler, you need to conduct an audit - repair it is easier than the turbine. The item can be sought either with serious faults to replace the new one.
Why does the intercooler break through? The fact is that the element is installed in the front of the car. Not only is it in front of the radiator, it is also fixed almost at the bottom of the bumper. Therefore, various stones can come here.
This is one of the main reasons why the turbine whistling occurs on the diesel engine during acceleration. By the way, the intercooler is not installed on all turbocharged motors. This must be taken into account when diagnosing. In some cases, the compressor has oil cooling (for example, on diesel engine "Cammis" from "Gazelle-Business").
Causes of whistle
The number of revolutions with which the fully suitable impeller of the turbine rotates, is more than a tens of thousands per minute. Definitely, a turbine whistle on a diesel engine during acceleration is a sign of depressurization in system connections. The turbine whistles due to the passage of compacted air through the slots. You can eliminate these problems yourself. To do this, you need to find the place that is the cause of these sounds.
Also, a turbine whistling when a speed set can occur due to air pass anywhere from the intake manifold to the intercooler. Also, the sound will occur if there are gaps between the GBC and the intake manifold (a loose fit of the block surfaces). If the gasket is broken, then it is also one of the causes of the whistle. Sound may also occur if third-party objects hit the inside of the mechanism.
Other signs of faults
Not only a whistle during acceleration may indicate the malfunction of the unit. There are other signs. According to them, it is possible to determine that the turbine is needed. We will look at typical malfunctions of an exhaust color unit.
Blue smoke
This is the first and most characteristic sign of breakage. When set speed from exhaust pipe Blue smoke will be thrown. In this case, if the motor works on lower revs, it will not be. The reason in the combustible oil, which will fall into the engine cylinders due to leaks from the turbocharger. A characteristic whistle can also be heard at a speed set.
Black smoke
The smoke of this color indicates that the cylinders burn due to air leakage in pumping highways or in the intercooler. Also another reason is electronic system Control. She can fail. Additionally inspect the state of nozzles.
White smoke
The reason for the formation of such a smoke should be sought in blocks of drain turbine fruit oil. If oils are detected on the unit of the unit or it is on the nozzles of the air path, it is caused by a clogged system in the air supply channel. The axis of the turbine could also be shown. As a result, the exhaust comes gases are unnatural.
Conclusion
We looked at why the turbine whistle arises on a diesel engine during acceleration, the causes of these sounds. In most cases, they are associated with air leaks. You can eliminate depressurization with your own hands. But if the breakdown is more serious, then you can not cope here. Modern turbines have a complex design, and the repair is better to entrust professionals. They are able to determine the sound, what the turbine whistles.
Many modern cars are often equipped with a special turbocharger. With it, it is possible to significantly increase power, as well as other characteristics not enough powerful or engine volumes.
Nasty whistle in turbine
During the operation of the turbine through it there is a large amount of air. This applies to all turbine models that can be installed on the most different models cars. It is important to note that the air passing through the turbine mixes with flammable. As a result, the total weight of the mixture becomes much more. Then the oxygen ends under high pressure, and an unpleasant whistling from under the hood can be heard. Moreover, this whistle may arise as idlingand during the movement of the car.
What is the reason for the appearance of such an unpleasant sound?It's all about violation of the system tightness. That is why problems arise.
It is important to note that these sounds can alert anyone, because in some cases it is about a very loud and piercing whistle. Do not panic and immediately after you hear the first whistle, go to the nearest service. You can cope with the solution of this problem on your own. To do this, you need to try to check the air nozzle as soon as possible, which is in the engine. It needs to be checked for tightness. In some situations, the sweet, which comes from the turbine, appears on a diesel engine directly at the time of overclocking. There may also be an excess air seats. In this case, it will only be enough to change all the seals, and also stronger tighten the fasteners and clamps. In this case, solve the problem will be much easier.
If you find that nozzles are in too poor condition, it is recommended to replace them with new ones. It is unlikely to get repaired them. Moreover, you should not try to put pipes that have already been used by someone earlier.
In case the system is sealed, however, the whistle is still heard, you need to carry out a much deeper diagnosis. It should be understood that the turbine is an extremely important technical element. It should work as stable as possible. Also do not worry because of a short and light whistle. This is a common thing. However, if the device is simply roaring, you need to repair the repair as soon as possible.
What are the reasons for the appearance of a whistle?
Usually, a turbine whistle is a sign of depressurization of connections in the system. In addition, the turbine can also whistle out of the passage compacted air through various slots. In this case, you can cope with solving the problem on your own. In order to do this, it is required to find the very place that is the main reason for the appearance of noise (whistle). Make it can be extremely fast.
Car owners with turbocharged engines often face the situation when a whistle appears when the supercharger is working, some of them do not give this phenomenon of particular, Color, which is how it should be others, begin to seriously worry, why the turbine whistles, how much money will have to be investigated.
Is it worth panicing right away, is the turbine whistle is a sign of her breakdown? Let's try to figure out and answer this question more detail. First of all, you need to pay attention to the character of the whistle and determine the place from where it is distributed, then the reason will most likely be clear. The principle of operation of turbochardou is not really so complicated, the impeller of the turbine accelerate exhaust gases due to which the high pressure is created, which provides a larger amount of fuel mixture into the engine, as a result, its power increases. Where air flows under pressure have a high probability of the appearance of a whistle, so it is impossible to immediately say that the appearance of some extraneous sounds during the work of the supercharger is already a sign of breakage. Machines with turbine usually have a rather complicated air intake highway, a whistle appeared? It is possible that the air flow moves from one nozzle into another pipe.
If a small whistle appeared together with the increased mileage, there is nothing particularly terrible in this, perhaps accumulated deposits in the air canals several changed their cross section, the air pressure increased. The whistle's tone in this case will be low, and the whistling sound is quiet, it appears as if from the depth, by the way on diesel engines with a superposition, this phenomenon is more frequent than on gasoline.
It happens, so that the turbine whistle is really a sign of breakage, if he is high enough and the tone is high, it is worthwhile, maybe there are problems. Always listen to the sounds, and if the whistle is heard not only outside, but also makes itself felt in the cabin, you need to try to determine its source and the reasons why it arose. First of all, you need to make sure that the turbine whistles, in any modern car There are quite a few units capable of publishing whistles. If it appears at idle and with increasing revolutions, the character does not change, the turbine is most likely not and, but if the whistling sound appears during the movement, and especially at the time of overclocking - the reason with a high probability of probability is in it.
Most often, the whistle appears due to the depressurization of the system: the air somewhere either breaks under high pressure, or somewhere there is air drums. In both cases, depressurization has an impact on the operation of the engine, not always, but often in such situations the fuel consumption increases, while the engine power drops. There are so-called "pliers" during overclocking. This is explained by the fact that the engine does the non-optimal mixture. It is not difficult to determine the place of air leakage, if it is in an obvious area of \u200b\u200baccess to which it is not limited in anything, but it often happens on the contrary, the problem is not on the surface, and literally in depth. If the air leakage site failed to determine the rumor or visually, you will have to disassemble the entire air tract to dismantle the intake manifold. In order to determine the place of air leakage, you can use the old in an effective way: Apply a soap solution for causing suspicion, where bubbles will appear where the air passes. When checking special attention It should be done by air nozzles, a small, inconspicuous crack of the crack can be a source of whistle. It is also necessary to check the availability of seals and gaskets and how much they are correctly installed, as well as the clamps are well tightened, in what state all other fasteners are, if necessary, it is possible to replace not only them, but the entire intake manifold is completely. This method of solving the problem is especially justified for relatively inexpensive cars with a turbocharged engine, for example, to easily buy affordable pricethan to repair damaged.
The cause of the whistles can be the turbine itself, and rather its damaged housing or the intercooler, (if there is in the design), it, by the way, is less protected from mechanical effects, since it is installed directly behind the radiator grille, while the turbine is further protected by several nodes and Details under the hood. The intercooler or as it is also called the turbine radiator. You can check without dismantling, it is enough to sue air. Such details can be repaired, unless of course damage, sometimes for such a worker van, how easier to find a new one than to restore damaged.
The most simple and easily eliminated cause of the woist of the turbine can be extraneous objects or trash that fell into the aircraft, at the earliest stage of diagnostics during the analysis they will be immediately noticeable
The reason why the turbine whistles is not always depressurization of air ducts, mechanical damage to this unit or its individual elements, for example, impeller, too, sometimes occur, the appearance of the backlash, banal wear. In such cases, the turbine whistle is not the first and only sign of its breakdown, most often it is confirmed by a black smoke from the exhaust pipe. There are other signs:
increasing oil consumption;
unstable work The engine is especially noticeable at the time of overclocking.
If suspicion in the car service will be confirmed without expensive repair Do not do, the damaged unit can be restored, but more often experts recommend replacing it. In most cases, the choice of justified, for example, will cost the owner in a well-acceptable amount.
And so, is it worth it to attach importance to the fact that from under the hood of a car with turbocharging suddenly heard whistles? Given the above, first of all, you need to pay attention to its tone, the volume and situations in which it arises. If it is not loud and low and appeared after time, together with the increase in the car's mileage, it is not most likely to worry, everything can be reduced to the peculiarities of the turbine.
If the whistle is high and loud, and in parallel with this, the engine began to work unstable, the oil consumption increased, possibly where, that is, a crack or even a few, they will have to do with elimination.
When, in addition to the whistle there are other disturbing signs, for example, black smoke from the exhaust pipe, it is better not to postpone contact in the car service.
