What kind of engine 1.7 CRDI. What is CRDI engine? All pluses and disadvantages of the motor

When choosing a new or used car, buyers pay special attention to which engine is located in the subcontrol space, they look at its characteristics, strengths and weaknesses, as well as possible malfunctions.

All this makes it possible to understand how properly and rational will be the purchase of a vehicle. In the history of each autocompany, there is both takeoffs and falls on the creation of power plants. Some engines become exemplary, and others want to forget about others.

One of the often discussed engines is Korean CRDI. Development belongs to engineers. Here we are talking about a diesel power unit equipped with a fuel injection system. It is this motor that is installed only on Korean cars of different models. But if we speak purely about the design features, then similar to the engine is found on machines of European companies.

Features of the device

Car enthusiasts and potential buyers of Korean cars are naturally interested in the question of what is CRDI engines and what distinguishing features they have. Let's start with simple. Namely with decryption.

Some are already known to indicate this abbreviation CRDI. This is a motor marking that denotes the Common Rail Direct Injection. The first two words make it possible to understand the fact of using one common fuel line, which is used in Korean diesel engines and their counterparts.

Sometimes such a highway is called no other than the rail. In this case, the fuel inside this highway is not only under constant, but also under sufficiently high pressure. The pressure itself is formed by the work of a high-pressure fuel pump, familiar to many on the abbreviation of the TNVD.

But if you compare with the classic high-pressure pumps, then the opening of the nozzles occurs under the influence of redundant pressure parameters. This function is performed by solenoids, which are controlled through the ECU.

The pressure in CRDI does not depend on the frequency of the rotation of the crankshaft or the amount of fuel itself. The driver can control and somehow affect exclusively on the amount of fuel that is injected into the system. As for the angle of advance and pressure of the diesel fuel injection, this task fully controls and regulates the control unit, that is, the ECU. Such a scheme of work makes it possible to divide the creation of the working pressure and the fuel injection process itself.

This allows one time to use more than one headlight of the injection. Initially, CRDI type engines were only two-phase. But now on certain power installations there may be about 9 phases only by 1 tact.

It can be said that the type of Korean CRDI and all existing full-fledged analogues is as follows. Here, the supply of fuel to injection injectors is carried out due to the use of a common tank. All diesel fuel comes from there. At the same time, the fuel itself is under the influence of high pressure.

This allows you to significantly distinguish with CRDI from classic diesel power units, which uses the fuel pump and cam drive.

If we take into account all the design features, the process of operation of the motor under consideration can be described as follows:

• when the driver turns the key in the ignition lock, the fuel rail is the process of injection fuel due to the work of a special installed in the pump design;
• in this case, the rake performs this very tank or a container with flammable;
• in the rail, the fuel injected by the pump is constantly under pressure, which is necessary for injection;
• then from the rail is supplied under pressure on injection injectors by appropriate pipelines.

Such engineering solutions made it possible to get a CRDI engine a number of objective advantages.

At the same time, it is impossible to forget that the motor also has certain disadvantages and problems that may occur during operation. Although it is typical for any engine.

Existing analogs

In addition, companies that produce similar power plants use their marking options. It is worth highlighting a few really worthy analogs:

1. Fiat offers a diesel power unit in its models, in many ways resembling Korean CRDI. Only the Italian stable labels its engine as CDTI.
2. Similar motor is present in the arsenal of the leading American. Their machines offer diesel units with direct injections that are called TDCI.
3. Another American autohygoant General Motors completes its cars with diesel engines. They are identified by VCDI or CDTI abbreviations, as in the case of Fiat.
4. And of course it is impossible not to note the Volkswagen company, which has a line of engines type TDI.

Some other companies also have analogues of Korean CDRI, but they are not so popular and common as considered analogs.

All the presented motors are largely similar to each other and they are united by one general concept. At the same time, certain structural differences are between them. But if you consider only the foundation, then all these diesel power plants equipped with a direct injection system of diesel fuel.

Potential problems and malfunctions

If we compare with Western countries, the demand for diesel power plants in Russia and the CIS countries is significantly lower. There are certain objective, and sometimes subjective reasons.

CRDI engines have certain shortcomings that can lead to faults.

On this account, you can bring some examples and explanations.

1. CRDI is considered reliable than a classic diesel engine, in the design of which is used by a high pressure pump. In this case, all parts require a high level of accuracy. Plus, a large amount of electronics is present in the motor. Therefore, elevated reliability is only a conditional concept.
2. Motors of this type are very dependent on the quality of diesel fuel, which in our conditions provokes the occurrence of a whole kind of faults and problems. The quality of diesel fuel at our petrol stations leaves only the best. From here the corresponding problems in the process of operation.
3. Fast wear. When planning to operate a car with a CRDI engine, be ready to regularly change the fuel filter. The reason for this is all the same low quality of diesel fuel. Impurities and all sorts of pollution quickly clog the filter element. If it is not changed on time, it can lead to serious negative consequences.
4. Dependence of efficiency from electronics. Although the electronics largely makes it possible to improve the operation of the motor, automate many processes and ensure optimal characteristics, any breakdown can minimize all the advantages of such diesel engines.
5. Problems arising during the period of severe frosts. CRDI is not particularly friendly with Russian cold, which is why different kinds of trouble and malfunction often occur in winter. This is mainly due to poor fuel and the impossibility of diesel fuel normally function in the engine system. It can provoke overheating, the failure of some elements and the final costly repair.

To prevent certain problems anyone, it is necessary to clearly adhere to the rules of operation, comply with the maintenance recommendations, to change consumables in a timely manner.

But nevertheless, the main factor of the long, reliable and silent CRDI service can be considered the quality of the used diesel fuel. If refueling on really good and verified gas stations, where the quality of fuel at a decent level, serious problems with this diesel engine, equipped with a direct injection system, should not occur.

Benefits

If you compare the diesel power unit of the CRDI type with classic versions of motors working on diesel fuel, then in the DVS with a direct injection system highlighted a fairly wide list of advantages.

Among the most significant advantages are to highlight the following:

• high performance indicators. The high pressure generated, which is stored in the fuel system on an ongoing basis, makes it possible to redirect the diesel fuel significantly more efficiently for further engine operation. The injection system used allows you to burn fuel in the maximum volume. This automatically contributes to a decrease in fuel consumption to perform its functions by the engine, that is, giving the acceleration machine. Although diesel motors are considered economical, CRDI managed to make another big step forward;
• excellent environmental friendliness. This advantage follows from the previously represented feature of the motor. Since CRDI can fade fuel as much as possible and consumes less diesel, due to this, the total toxicity of the resulting exhaust is reduced. This is especially brightly noticeable when high-quality fuel is poured into the tank;
• pressure system. In diesel systems where the direct fuel injection is provided, the pressure does not depend on how much the element is rotated as a crankshaft. It also does not depend on the volume of fuel or other parameters. All because in the fuel rail fuel is constantly injected, that is, it is under constant pressure. This contributes to an increase in the efficiency of the motor;
• fuel is supplied by the electronic unit, which is called EDC. The needle in the fuel injection injector rises due to the fact that the electronic unit submits the appropriate command and it is implemented through a controlled solenoid. Thus, the need to effect the fuel itself on the process of lifting the needle of the nozzle;
• the presence of electronic control. CRDI engines benefit from competitors due to the fact that the amount of fuel supplied, injection pressure and the same injection advance angle are determined and adjustable electronically due to the use of the control unit. Thus, the system can automatically select the optimal parameters and set them in the process of operation of the engine in different conditions and operating modes. At the program level, you can specify the pressure parameters on the injection, which depends on the speed of movement, the load on the car and other nuances;
• no high noise level. Among all of their competitors, CRDI engines can be considered almost silent. Yes, completely silently they cannot work, but the noise effect created is insignificant. This is explained by the fact that the system uses the so-called phased injection. At certain modern motors, the number of phases reaches 9. Such a feature affects not only the improvement of the speed characteristics of the vehicle. It also helps to reduce the noise level during the operation of the power diesel installation;
• fuel is under high pressure. In standard diesel engines to achieve high pressure extremely difficult. Usually this parameter does not exceed a value of 300 kg / cm2. If we talk about CRDI, then such a system due to the work of direct injection reaches parameters more than 2000 kg / cm2.

As you can clearly see, CRDI has a really extensive list of objective advantages. It is they allow these motors to be largely a priority choice for the buyer when purchasing a car with a diesel power plant.

But before making final conclusions regarding diesel engines with the system of direct injection of diesel fuel, first it is necessary to study their characteristic flaws.

disadvantages

In fact, the technology based on the work of the CRDI diesel power unit and its analogues is based significantly exceeds standard diesel engines. But the system also turned out to be noticeably more difficult, where the list of certain flaws follows.

1. A high level of sensitivity with respect to the quality of the fuel fuel fuel. If in Europe this deficiency is not manifested much, then in Russia and the CIS countries such sensitivity makes itself felt almost immediately after the start of operation. The engine uses a complex system and a multi-level design. If the fuel pump, nozzles and any other elements responsible for feeding and processing fuel will fall garbage and various kinds of contamination, it can potentially provoke the emergence of serious problems and problems. Therefore, it is impossible to allow such contaminations in the fuel. This provides for the mandatory need to use exclusively high-quality fuel. Since in Russia, find refueling with pure diesel fuel, actually relevant to all European standards and standards, not so simple, car owners accounted for with special care to choose a gas station. To minimize the risks, you should periodically check the status of the filters and change them on time.
2. Reparatively high cost. If you compare precisely with conventional traditional diesel engines, the Motors implemented using CRDI technology will initially cost the buyer more expensive. This is due to the complexity of the design and the system of directly injection of diesel fuel, which increases production costs. The same entrepreneurship of the motor in its implementation. In order for CRDI to work correctly and correctly, it is equipped with special sensors, a special setting is performed, the electronic unit is programmed. This entire list of mandatory activities that are carried out in the assembly process and directly preparation of the engine to operate requires resources from automakers. Therefore, to sell CRDI at a price similar to standard diesel engines, the company simply cannot. It will be a direct loss in which no one is interested.
3. The complexity of the repair and high service price. And this disadvantage is directly related to the fact that CRDI with the system of direct injection of diesel fuel is much more complicated by its design and device. Because of this, the process of repair and maintenance is complicated, more resources are required for comprehensive diagnostics. Since now such motors can be called conventionally new developments, which relatively recently entered the market, while not every car service is ready to take on the maintenance and repair of such a power unit. Most masters simply lack the experience and knowledge of the complex device of such an engine. They are not able to maintain it
4. The complexity of searching for masters. The disadvantage of all previous minuses, which is quite relevant for motorists from Russia and CIS countries. All the same complex system of the system provokes such a problem as a shortage of frames that can maintain and efficiently repair the CRDI engines. The optimal solution is considered to appeal to certified and official service centers directly related to companies that are selling cars with appropriate power plants. But this automatically raises the cost of repair and maintenance of the machine, the warranty period of which is already expired.
5. Low level of maintainability. Unlike the same classic diesel engines, where a huge number of individual details are subject to repair, restoration and replacement, CRDI cannot boast of characteristics. The maintainability of the diesel engines under consideration with the system of direct fuel injection and fuel supply under pressure is rather minor. A large number of recovery elements are not subject to failure. It is possible to solve the problem only by replacement. Moreover, some components change exclusively modularly. This automatically significantly increases the costs associated with the maintenance and content of such an engine. Instead of buying one small detail and change it, you have to acquire a whole module.

But here you should be extremely objective. All the considered disadvantages are sufficiently conditional, as they follow only from one nuance. And we are talking about increased sensitivity to the quality of fuel used. This formed the erroneous opinion on the fact that CRDI engines have a low level of reliability. Such an approval is absolutely not true.

It is enough to pour a good diesel fuel tank into the fuel tank, and all these problems will absolutely will not touch the car owner. Yes, there are a number of other factors that can entail breakdowns and rapid wear. But they are all connected with aggressive manner driving and a negligence attitude to the car.

It is the low quality of diesel fuel that leads to the emergence of more than 90% of CRDI engines. In fact, it is enough to solve one problem, and the attitude towards this motor will change.

Buy a car with a power plant type CRDI personally each. It should be carefully examined by all the features of the engine, consider its strengths and weaknesses, on the basis of what to accept the appropriate proper decision.

The fact that the engine will serve for a long time and how much you will succeed in feeling all the objective advantages of CRDI depends on the driver's relationship towards your transport facility. Holding to the manufacturer's recommendations on timely maintenance and replacement of consumables, as well as trying to attend proven gas stations, this motor will be able to show all its best qualities. And then, no matter how difficult and expensive repair will not go and speech.

CRDI is indeed a new turn in the development of productive and highly efficient diesel engines, which are characterized by excellent technical characteristics with excellent economic indicators. But objectively domestic diesel fuel is not yet ready for such engines.

Still very well remember the first generation Sorento. He became a bestseller in his way. Despite the fact that the first Sorento was like more on SUV, he was a real SUV with a frame and a gearbox. Unfortunately, in his endurance tests, he had serious and expensive malfunctions: refused rear axle reducer and turbocharger.

During the test, the Kia Sorento 2.2 CRDI wheel was visited by 33 drivers from the editorial office of the Polish branch of the German magazine AUTO BILD. For 100 700 km of the road, the car came the city, gravel and motorway. The crossover was often fully loaded, but to permissible limits. The car survived the winter in the Alps and the terrible heat in Croatia. Result: In addition to the disorientizing navigation, later replaced by warranty, and the inclusive sensor of the ambient air temperature, there were no damage and mechanical faults. In winter, the car was a little cold. The Large SUV trunk was just by the way for editorial photographers, who were always taken by a large number of equipment, and for lovers of winter sports preferring to relax with the whole family.

"Economical - diesel fuel consumption is below 8 liters, lack of oil consumption, quite comfortable, a large number of space and good challenges outside asphalt" - such positive feedback gathered a tested crossover after a trip to Croatia.

Next, in the onboard magazine was: "SUV is confidently going forward on Kosoyrats and stones. Only occasionally the front wheels lost contact with the surface of the Earth. When moving on an unfortunate serpentine, no cod, no noise in the cabin was. The engine works clean. Large hatch, which does not delay too much air, fortunately is not a source of irritating wind noise. "

But during the expedition to Croatia, several minor flaws were discovered. So stopped the curtain of the trunk, and refused the ignition unit of xenon light of the right headlamp. The software of the navigation system turned out to be obsolete. Xenon headlights are shine high even after the correction conducted within the framework of scheduled maintenance by 60,000 km. Often, at night, in response, I was blinking by far the oncoming drivers. Unfortunately, reflector xenon light The optimal vertical lighting angle picks itself automatically.

One once fell into an unpleasant situation when the keys remained in the engine ignition lock with the engine turned off. The central castle blocked all the doors. The driver had to fall into the salon through the hatch, which fortunately was opened. The question arises: why the electronic system blocks door locks when the key is in the ignition lock.

In turn, the high test editor states: "Comfortable seats, the back does not hurt even after 500 km of movement without stopping. But, unfortunately, after 70,000 km, a small backlash appeared at the driver's chair - during acceleration it deflects a little back. "

Other Disadvantages: the USB port loose slightly, and when the parking brake lever is released, it often remains on the penultimate "tooth", because of which the movement begins with slightly pinned pads. Correct the laughter helps a warning beep.

Other editors after a long journey praised an economical diesel that consists of only 8.7 l / 100 km when moving at a speed of 140 km / h. But it did not cost without reproaches: the sound of the engine of the engine seemed too similar to the "tractor", and the washing liquid tank was emptied by a record pace. Also marked the noisy work of the suspension. By the end of the dough on seats with leather upholstery, there were obvious signs of wear. The same was also observed on the gear shift lever. At the end of the test, an incomprehensible grinding appeared when transfers. One of the tests noted too much noise of the incoming flow from the front racks.

Nevertheless, everyone appreciated Kia Sorento positively: "Powerful engine, smooth running, pleasant and secure control, an acceptable level of comfort." Despite the fact that during the test, the car is raised twice as fast, Sorento got to the finish line without a single mechanical malfunction.

You do not know what CRDI engine is? We will explain to you! In connection with the adoption of more stringent measures in the field of ecology on the splash of adverse substances in the environment, the Common Rail fuel system for diesel engines began to apply.

Fuel supply to the cylinder in the system flows under high pressure. Therefore, cars with Common Rail acquired fuel consumption savings about 15% and an increase in engine power by 40%. The CRDI system has gained widespread, among cars with diesel engines, which are operated with this system.

Description of the system

The term Common Rail from English to Russian literally translates "Total Highway". Based on the translation of this term, this definition is laid in the principle of operation of this system. When it was created, a new CRDI diesel engine was designed with direct fuel injection into the cylinder.

The CRDI motor received improved characteristics over dynamics and power, which went to comparison with the analogues of the characteristics of gasoline engines. For software management of the engine modes, a special electronic unit was developed. The final step in the development of this system was the supply of fuel under high pressure into the total highway.

For any diesel engine, various modes of operation and variable loads are characteristic. When the engine is running, a variety of load occurs, independent of the crankshaft revolutions. The question arises how high pressure stabilizes in the system?

A control unit was installed for this purpose, which retains high pressure in the system due to changes in the volume of the fuel pump. Moreover, the maximum pressure is created when the crankshaft turnover reaches the minimum value.

From the working conditions of the motor, the computer due to the supply of different pulses actuates simple nozzles, which are equipped with electromagnetic or peeneelectric valves.

The advantage of Common Rail is the optimal engine operation. The maximum return of fuel burnout in CRDI cylinders is closely related to the great accuracy of the electronic unit and high injection pressure. Moreover, optimal results are achieved on all modes of engine operation. Based on this, the fuel consumption is reduced and the exhaust toxicity of exhaust gases is reduced.

Due to the creation of CRDI with significant potential, the industry of diesel engines has been widely developed. Everyone knows that it is necessary to develop technologies to reduce exhaust emissions into the atmosphere. Since the norms of ecology for toxicity regularly increase. Due to all these conditions, Common Rail will continue to develop hard.

The advantages and disadvantages of the CRDI system

Not a significant presence of toxic elements in exhaust gases is created due to the full combustion of the fuel and air mixture, and there is a significant increase in engine power.

The main difference of the CRDI engine system is the preservation of fuel pressure at one level and the independence of the crankshaft revolutions, the volume of fuel and other different factors that could affect injection at different modes of engine operation.

Due to the electronic control unit when fuel feeds, the injectors for injection occurs. A constructive feature of the system nozzles are special electromagnetic solenoids built into them. Thanks to which all this was implemented.

This is also a feature of this system. In the Common Rail in the injector nozzle, the needle rises due to the control of the solenoid, and not at the expense of fuel pressure.

Also, the system occurs software injection pressure control, the amount of fuel and an angle of injection advance. That is, the program is stitched to the ECU and is used under different conditions and modes of engine operation.

Fuel and injection injection turn out to be completely separate processes. What led to another CRDI advantage, namely multiphase injection, the minimum of two-phase. Based on the speed mode, the number of revolutions and the load on the engine can be dynamically changing the injection pressure.

In Common Rail, the phased injection occurs in 1 working clock, although before the development of the system was assumed a double injection. More attention was paid to getting rid of detonation. Today, the developed systems provide nine phases of fuel injection. A phased injection has significantly reduced the noise level of the CRDI diesel engine, which is another advantage.

Accurate dosage of fuel as part of injection time is provided by high constant pressure in the rail. In previous developments with the usual high pressure pump, there was no such possibility. All attempts to change the pressure led to the occurrence of wave-like pulsation in pipelines, from the pump to the nozzles.

As a result, when exposed to these waves, pipelines were quickly faced. Therefore, in the pump pressure by which the fuel injection in the nozzles is strictly limited. It became clear that the simple pump could not be injected with a pressure of 300 kg / cm2. And the Common Rail system is pretty exceeds this figure. CRDI system without the destruction of the system and fluctuations in pressure involves a mark of up to 2000 bar.

Along with the advantages, the CRDI motor has a number of significant flaws. One of the disadvantages is sensitivity to the quality of diesel fuel. Many elements of the system, namely the nozzles or the pump instantly fail when the other slightened particles or fractions are hit.

Another disadvantage is the high cost of engines equipped with CRDI system, which ultimately increases the total cost of the vehicle. For a clear engine operation, which are laid in the design, so such a system is complex.

Therefore, the possibility of repair in garage conditions is excluded, only in specialized services. Because for repairing the system requires special tools, diagnostic stands and various types of equipment.

When repairing CRDI, a modular replacement of spare parts is required. And this leads to additional costly costs. Accordingly, from the above reasons, the cost of work performed will be sufficiently high.

Based on the above information, it becomes clear why in the territory of Russia many car owners still regard the system of diesel engine Common Rail with a disadvantageous solution. The whole thing is as domestic fuel and the level of car service with such engines.

All CRDI motor components are made with increased accuracy, that is, the penetration into the system of third-party elements is not allowed. In terms of high pressure, the parts after consumption of poor-quality diesel fuel will instantly come into disrepair. And their replacement implies certain difficulties and increased costs.

586 | 21.09.2018

The first Korean turbodiesels with the COMMON Rail system appeared in 2000. That is, Koreans are not behind the global trends in creating diesel engines. The firstborn in the CRDI family is a 4-cylinder 2-liter engine with. It followed the 3-cylinder 1.5-liter engine with D3EA designation. In 2002, a 2.2-liter modification appeared (D4EB), created on the basis of a 2-liter CRDI.

In this article we will talk exactly about the first version of the engine - 2.0 CRDI (D4EA). Much of the one said about it is true for its closest relatives with a volume of 1.5 and 2.2 liters. Video about device and engine problems you can see on our YouTube Channel

Buy the contract engine Hyundai or Kia 2.0 CRDI (D4EA) you can.

In the engine 2.0 CRDI (D4EA), the pig-iron block, in the aluminum cylinder header of the valves, one camshaft, valve drive with roller levers (rockers), with hydrocomathers. Timing timber strap. D4ea engine power ranges from 112 to 150 hp Version more powerful 125 hp Equipped with a turbine with a variable Garret geometry. We disassemble the basic version of the engine with a turbine with a bypass valve. Fuel system COMMON RAIL from Bosch with TNLD CP1.

By the way, this engine was widespread in Russia on the Santa Fe Classic model, which was going on Tagaz until 2010. And in Ukraine they collected the first "Santa" with this engine until 2006.

Reliability and resource of the engine 2.0 CRDI (D4EA)

On the reliability of this engine a lot of controversial information. Many such engines serve without problems and when running more than 400,000 km. At the same time, many engines 2.0 CRDI went to kapitalka or were replaced by runs about 150,000 km. Much depends on the quality of service, the "observation" of the owner and fuel quality.

Turbocharger

The turbine on this engine is quite reliable, resource and usually does not cause problems. But the supervision sensor, especially on Motors 2.0 CRDI with a capacity of more than 125 hp Pretty buggy. In 2014, Koreans even announced a revocation campaign, within the framework of all high power 2.0 CRDI engines released until March 10, 2014, changed the supervision sensor.

Candles of incandescent

Candles of incandescent on the engine 2.0 CRDI should be changed every 3 years - they do not serve longer.

One of the causes of the whole

The basic 112-strong version of this engine is deprived of the oil collector of the ventilation system of crankcase gases. Here in the valve lid simply stands the oil removal plate. Responsive owners of cars with this engine installed the oil collector of their own design. Because of such a frankly simple solution, many oil vapors, especially when polluting the oil sequel, simply flies into the inlet and burns in cylinder chambers. Periodically requires the cleaning of the valve cover to eliminate this cause of zora oil.

The problem with clogging a sapunion of the ventilation system of crankcase gases, which can be judged by the battery from the oil refinery, can not be launched in any case. You can drive up to a strong zhora oil, criticized reduction of its level and before disrupting the lubricant of the neck of the crankshaft with the flowing from here, we turn the liners and even the destruction of connecting skeins. Yes, yes, all these troubles can occur simply due to the "wrong balance" of gases in the engine crankcase.

VVG valve on the engine 2.0 CRDI membrane and usually no questions on it: the membrane serves for a very long time.

Fuel systemBosch.

The fuel system is capricious, very sensitive to the quality of the fuel. Worn nozzles begin to merge a lot of fuel into the return, which is why the engine 2.0 CRDI is poorly started and stalls. For unsure operation of the engine, there is enough single pouring into the invertation.

But if the nozzle begins to make the fuel incorrectly, inject the fuel early, then you can get on the engine overhaul. Because of the wrong combustion of the fuel mixture, the piston in the cylinder is destroyed and destroyed in the cylinder with an incorrect fuel spray. In general, the nozzles on the 2.0 CRDI engine require close inspection and preventive check on the stand.

In addition, under nozzles, naturally, refractory copper washers are roasted, because of which the nests of the nozzles are climbing, and the culstitude of the CFC, there is an overpressure under the valve cover and in the ventilation system of crankcase gases.

Buy diesel fuel nozzles for the engine Hyundai or Kia 2.0 CRDI (D4EA) you can.

Separate hassle cause refused fuel pressure regulators and fuel pressure sensor installed on the ramp. If the regulator fails, the engine 2.0 CRDI stalls when overclocking, uncertainly start. With the malfunction of the pressure sensor - does not develop rev.

Buy the fuel pump (TNVD) for the engine Hyundai or Kia 2.0 CRDI (D4EA) you can.

Problems with GBC

A lot of 2.0 CRDI engine problems occurs in its block head. Hydrocompensators here turned out unreliable, may fail. Moreover, in the very sad case, a rocker can fly from a faulty hydraulic compressor or to dry out the valve. Mechanical damage to the engine in this case will hardly hit the owner's pocket.

The 2.0 CRDI engine block head is not complaining due to valve wear: working chamfer in a pair of the valve seat plate. Also, the GBC may simply crack over the channels of incandescent candles or deform.

There is quite a fair opinion that all these troubles occur due to the incorrect work of worn fuel injectors. Therefore, if the engine 2.0 CRDI brought to the capitals, it is important to find the cause and be sure to check all the nozzles.

Pomp cooling system

Also behind the engine 2.0 CRDI there are such sinners as a pumping. Since the pump is driven by a gear strap, its encoding leads to a belt cliff and "Stalingrad": pistons and valves will face each other.

Piston group

On the pistons of the engine 2.0 CRDI, piston rings can be destroyed, collapsed partitions. And again, this is due to improper mixing, when the nozzle is injected into the fuel not into the recess in the bottom of the piston, but too early - almost throughout the cylinder volume, which causes excessive heating of the heat belt of the piston.

And with frequent short urban trips, when the engine does not have time to warm or during savings on the oil service on the engine 2.0 CRDI, piston rings are locked.

Large automakers are constantly improving the motors, producing new power units to the market. One of the innovations of the Hyundai / Kia concern is a CRDI diesel engine (Common Rail Direct Injection) - with a direct injection system. You can meet such an engine only on Korean cars, but the motors can be installed on the machines of European companies similar from a constructive point of view. As part of this article, we consider what the CRDI engine represents which it has advantages and disadvantages.

Table of contents:

Analogs of the engine CRDI

First of all, it is worth talking about the analogues of the CRDI motor, close to constructive execution:

• Fiat similar motor releases under the abbreviation CDTI;
• Ford Similar Engine releases titled TDCI;
• The General Motors concern such motors produces CDTI or VCDI abbreviation;
• Volkswagen Similar motors call TDI.

Other companies also have CRDI motor analogues from Korean manufacturers, but they are less common than those named above.

All listed engines are generally close to each other in general concept. They have some minor differences in constructive performance, but they all diesel and have a direct fuel injection system.

Principle of operation of the engine CRDI

The feature of CRDI diesel motors (and analogs) is that the fuel supply injector nozzles is carried out from the total tank, where the fuel is under high pressure. Thus, this design, in contrast to the usual diesel engines with a fuel pump and cam drive, allows the supply of high pressure fuel.

In general, the process of operation of the engine CRDI looks like this:

1. When turning the ignition key, diesel fuel in the COMMON-Rail fuel rail is injected using a special pump (this rail and there is a reservoir designated above);
2. In the rail, the fuel due to the discharge of the pump is constantly under pressure for injection;
3. After that, from this rail, fuel is sent under pressure to injection injector injectors.

The advantages of the CRDI engine and its analogues

The diesel engine of a similar design, which has a direct injection system, has a number of obvious advantages over ordinary motors:

Disadvantages of the CRDI engine and its analogues

The CRDI system itself is significantly superior to a standard diesel engine. But it is much more complicated, which flows a number of flaws:

There is a common misconception in the low reliability of the CRDI engine and its analogues. It is connected with the fact that the motor has increased requirements for the quality of diesel fuel. Since in Russia, not all refills can provide high-quality fuel, it leads to a motor breakage.