2.2 CRDI What is the engine. Features of CRDI automotive engines, their advantages, disadvantages and possible malfunctions. The advantages of the CRDI engine and its analogues

We continue our story about popular diesel engines in the secondary market and their features. In focus of attention - Korean motors manufactured by Kia / Hyundai CRDI.

Consider how reliable Diesels 1.6 CRDI (U), 1.7 CRDI (U2), 2.0 / 2.2 CRDI (D), 2.0 / 2.2 CRDI (R).

What are the features of CRDI engines

Diesel motors with a direct injection system that produces Korean auto industry Kia / Hyundai, got the name CRDI - COMMON RAIL DIRECT INJECTION.

Similar to the constructive solution of diesel engines can be found from Fiat (CDTI), Ford (TDCI), General Motors (CDTI / VCDI), MERSEDES (CDI / CRD), Volkswagen (TDI).

Motor CRDI featureand their analogues are that, in contrast to the usual diesel engines with a fist with a cam drive, fuel is supplied to the nozzles from the total tank (fuel rail), where high pressure is stored. When turning the ignition key, the fuel is injected with a separate pump in the rail, and then according to the fuels of pressure on pressure.

Due to the constant high pressure in the system (in CRDI motors, the pressure reaches 2000 bar) diesel engines with direct injection more economical and environmentally friendly.

• Fuel is injected dosed and better sprayed around the chamber, burns more effectively.
• Fuel pressure remains unchanged regardless of the rotation frequency of the crankshaft or the volume of fuel.
• The injectors operating controls the EDC control unit.
• The separation of the processes of fuel injection and its injection allows you to achieve multiphase injection or change pressure depending on the load on the motor, which increases the return of the diesel engine and reduces detonation in the cylinders.

To CRDI disadvantages And similar engines include a more complex design - hence the cost and complexity of maintenance and repair, as well as sensitivity to the quality of diesel fuel.

Indeed, the engines with Common Rail, including CRDI Korean aggregates, may fail due to the pump breakage, nozzles and other nutritional elements even because of small third-party impurities. With challenging to fuel diesel engines with a direct injection system, the opinion of the unreliability of them in general is connected.

• About Typical Problems Common Rail Bosch Read

Let's see how it is about the reliability of diesel engines, which are installed on a number of Hyundai and Kia models.

Kia / Hyundai 1.6 CRDI (U)

The 1.6-liter diesel engine (D4FB) was presented in 2005.

Together with it, 1,5-liter motor (D4FA) was presented, the only difference of which from version 1.6 is the smaller diameter of the cylinders, and the 1,1-liter machine with three cylinders (D3FA), a reduced copy of the same 1.5 CRDI

• A little later, in 2008, a 1.4-liter D4FC was added to the CRDI diesel location, it differs from the piston's move.
• In 2010, the family appeared top 1.7 CRDI (D4FD), which became the most popular.

Since Diesels 1.4 and 1.7 appeared later, they are accepted to relate to another generation of CRDI motors - U2.

Generally, the family of engines u This is the first independent development of Hyundai-Kia in terms of diesel engines with the CR injection system.

These motors are considered sufficiently reliable, their advantages are a relatively simple design and the absence of expensive in the elimination of "chronic" sores. Common Rail Fuel Instrument from Bosch, although coming to fuel, is considered sufficiently resource.

Constructively 1.6 CRDIit is a 4-cylinder unit, 4 valves per cylinder and 2 camshafts. Cylinder Cylinder Cylinders, HBC Molding from aluminum.

In the 16-valve versions of the Motors of the family of the U, including this 1.6 CRDI, there is no two-time flywheel, which reduces the maintenance.

1.6 CRDI turbine is used with variable geometry. The timing thrower is unusual, consists of two chains and tensioner.

In all versions of the motor, there are valve hydraulic components, and phase regulators appear since 2009.

All versions are equipped with branded vortex valves SWIRL CONTROL VALVE, an EGR electronically controlled valve and a sump filter.

Power Depending on the version varies from 90 to 136 hp (235 - 280 nm).

• In the U1 family, two versions - LP (90 hp) and HP (115 hp)
• In the U2 family, too, two versions - LP (128 hp) and HP (136 hp)

Puton the:

• Hyundai i30 (1 and 3), Hyundai Accent RB, Hyundai Elantra (4)
• Kia Ceed, Kia Cerato, Kia Soul, Kia Vengra.

The owners praise the fuel efficiency of the motor and the absence of a furniture. For a diesel engine, an aggregate is working culturally and quiet. There are no problems with starting "on the cold" engine, it can withstand conditions up to -20 ° without problems.

In general, reliability 1.6 CRDI above average, but some problems did not go around it.

• The branded problem is the cracking of the "Furniture" highway, which comes from the injectors to Baku. For this reason, the engine may not start on the hot. The breakdown is solved by replacing the tube.
• One of the chains of the timing can stretch already to 100-150 thousand km, although the manufacturer declared an unlimited resource. Unstable engine operation and trimming can be associated with a stretched chain.
• CR BOSCH nozzles are afraid of bad fuel. If they are contaminated, the motor will twist and constantly stall. Another reason for the same problem - refused the pressure regulator of the fuel ramp.
• In the first years of release, the owners faced the problem ahead of the dying turbine: a mistake in the software led to the fact that the compressor worked on too high revs. If the turbine begins to swell on small runs, it is worth starting with checking the contacts of the supervision sensor.
• Interruptions in the work of engines released in 2010 are most often related to the late replacement of the fuel filter.
• Falling thrust and power interruptions are usually explained by the pollution of the vortex dampers. Inlet collector, vortex dampers and valve EGR must be cleaned regularly.

The manufacturer determined the 1.6 CRDI resource in 200 thousand km, but with good care, the engine until overhaul lives one and a half times longer.

KIA / HYUNDAI 1.7 CRDI (U2)

The 1.7-liter diesel engine presented in 2010 became a logical continuation of the U family and headed his second generation - U2.

This is a 4-cylinder inline unit with 16 valves and two camshafts. The timing chain drive consists of two chains and tensioner. A block of cast iron, the block of the block is made of aluminum.

Turbine - with variable geometry.

Hydrocomathers are on all versions. D-CVVT phase regulators are also used, which is rather unusual for diesel engines.

Fuel system CR from Bosch with electromagnetic nozzles. The motor is equipped with a smbed filter and ERG system.

Motor is produced in two versions:

• LP power 114 hp (260 nm)
• HP with a capacity of 141 hp (340 nm)

Installed 1.7CRDI on the:

• Hyundai i35 (2), Hyundai I40, Hyundai Tucson,
• Kia Carens (3), Kia Optima, Kia Sportage (3.4).

Owners praisethis popular Korean diesel diesel for confident launch even in the frost, inexpensive service, cravival with moderate fuel consumption.

To disadvantages 1.7 CRDIcan be attributed The sensitivity of fuel injectors to the quality of fuel. Small engine prevalence complicates repair and search for spare parts.

In addition, some other problems are characteristic.

• The 1.7-liter diesel is characterized by leaks of oil from under the valve cover. Replacing the gasket along with the lid under warranty does not solve the problem for a long time.
• If the motor troit and twists during acceleration, the nozzles were probably wear out: from poor-quality fuel to wear will be rapidly.
• The thrust disappears from the filter deposits of the filters, especially the fuel. It is impossible to violate the regulation of its replacement, otherwise the power supply system can be output.
• Electronic errors in the operation of the turbine can be associated with sensor wiring: Check the integrity of the contacts.
• There were cases of overheating of the engine due to the punched gasket, and the malfunction is characteristic of passenger cars.

The manufacturer declares the 1.7 CRDI resource at the level of 180 thousand km, but with good care it will last longer.

KIA / HYUNDAI 2.0 / 2.2 CRDI (D)

Diesel 2.2 series D4EB produced from 2002 to 2011 in Korea. In the first years he was put only on Hyundai Sonata. The engine is not an independent development of the concern, and the creation with Italians from VM Motori. After the release, the motor was not upgraded more than once.

Also in the family D included 1.5 liter unit (2001-2006) and 2.0 liter diesel (2000-2010).

Constructive 2.2 CRDI (D) It is a cast iron unit for 4 cylinders with a 16-valve aluminum head.

A strap is used as the timing of the timing. Power system - COMMON RAIL BOSCH.

Power Depending on the version amounts to 139-155 hp (343-353 hp)

Installed 2.2 CRDI (D) on large models:

• Hyundai Santa Fe (SM, SM), Hyundai Sonata (EF, NF), Hyundai Grandeur TG.

2.0 CRDI was collected in 2000-2010 and put on popular models:

• Hyundai Santa Fe (SM, CM), Hyundai Tucson Jm, Hyundai Elantra XD, Hyundai Trajet, Hyundai Sonata NF
• Kia Sportage Je, Kia Magentis MG, Kia Carens Un, Kia Cerato LD

Power 2.0 CRDI (D) varies from 112 to 151 hp (245-350 nm).

Problems during operation 2.2 and 2.0 CRDI (D) of the same type and are mainly associated with the age of the motor.

• Typical age sores of this diesel engine - cracking the head of the cylinder block and burned washers under the nozzles.
• Fuel equipment for large runs or use of dubious fuel also delivers problems: nozzles are clogged with outsided fractions in the fuel, the pump starts "dripped".
• The timing belt is important to change according to the regulations, otherwise the valve blasts it.
• If the motor freezes on certain revolutions, it is likely that the ECU works incorrectly, and the EGR valve is covered in Nagar.
• Over time, the oil worker is clogged with the residues of the burned oil, which leads to starvation in the engine lubrication system and can cause the burden of the insertion.

The manufacturer appreciated the resource of Diesel 2.0 / 2.2 CRDI (D) in 250 thousand km.

KIA / HYUNDAI 2.0 / 2.2 CRDI (R)

This diesel was introduced in 2009. The R family, which, unlike D, already completely independent development of Koreans, includes two aggregates with a volume of 2.0 and 2.2 liters. Collect engines at the company's own factory in South Korea.

Constructive 2.0 / 2.2 CRDI (R) is characterized by the following. The block and head of the block are cast from aluminum, the motor has 2 camshafts and 4 valves per cylinder. Valves are equipped with hydrocompensators.

Inlet collector and plastic valve cover. Turbine - with variable leater geometry.

The GDM is driven by two chains with a hydraulic machine. To reduce vibration, lower balance shaft is provided.

The engine is expected to be equipped with a diesel filter and exhaust recycling system.

Common Rail Bosch Power Supply with Piezoelectric Nozzles.

Power 2.2-liter versionvaries from 197 - 200 hp (421 - 441 nm).

Put such a motor on

• Hyundai Santa Fe (2, 3), Hyundai Grandeur (5,6)
• Kia Sorento (2,3), Kia Carnival (2,3)

Power 2.0 CRDI (R) is 136 hp (320 nm) at the LP version and 185 hp (400 nm) at the HP version.

Put these diesel engines on

• Hyundai Tucson (IX35 2, 3)
• Kia Sportage (3,4)

The owners praise the economical fuel consumption and the directions of the engines 2.0 / 2.2 CRDI (R). In general, these diesel engines are considered quite reliable and modern, and do not require expensive "consumables."

The disadvantages include the sensitivity of nozzles to poor fuel and maintenance difficulties: some repairs require high qualifying of masters. So, when replacing incandescent candles, they often break.

We list typical Motor faults 2.0 / 2.2 CRDI (R).

• Tapping and other noise in the engine compartment, in the area of \u200b\u200bthe timing chain. These sounds are connected with the fact that the hydraulic power feeder has been hampered by speaking oil, it must be cleaned.
• Fans of active ride faced the fact that the engine takes oil: about 0.5 liters per 1000 km.
• If the motor began to toss or sall, probably nozzles have been hammered by a sediment from fuel and outsiders. Sometimes it helps washing the nozzles on the stand, but if they fail, they are not restored, but change to new piezoelectric nozzles.
• Surfing the machine during acceleration and failures in engine power - a sign of a clogged fuel filter. It is inexpensive, the main thing is not to be lazy to change according to the regulations.

Korean autoconecern assesses a diesel resource 2.0 / 2.2 CRDI (R) in 250 thousand km, but the experience of the owners shows that in practice the motor lives longer, the main thing is to choose high-quality fuel and service in time.

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Fuel diesel injectors will be found in our catalog

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.

The CRDI automotive system, referred to as Common Rail, has certain advantages and some disadvantages. To date, it is installed on a fairly wide spectrum of automotive engines, it is characterized by certain characteristic differences in its modifications.

The system designated as CRDI was developed as the main system for powering the engine, but even now many car owners still consider it too exotic, and on the basis of this, not reliable. In fact, the situation is somewhat different, and CRDI applies on a large number of different auto models.

Daimler concern car such a system is characterized by the designation of CDI, CRD, on the Fiat concern cars, this abbreviation will be JTD, TTID, DDIS, Ecotec CDTI, on Ford is TDCI, Kia and Hyundai - CRDI or Common Rail Direct Injection, on Volkswagen Group - TDI .

In addition to the automotive industry, the power units that use this solution is very actively used in shipbuilding processes and on railway locomotives.

When transferring from the English "Common Rail", you can translate as a "common rail" or "Total Magistral".

In accordance with the title, the principle of operation of such a system is based on the supply of fuel to the injectors, when using a common battery, in which a sufficiently dense fuel pressure is created before it is injected. That is, it is specifically for the injection of high fuel pressure, a common ramp has been developed (it is a common rack). Creating high pressure when fuel supply and its support over the entire fuel system occurs, regardless of the rotation speed of the crankshaft in the unit or from the actual amount of working fuel, which is injected.

This is the main difference from the standard diesel type system with an TNAD, as well as a cam type drive, for which a low pressure is characterized during fuel supply. The injection process is carried out by nozzles under the control of the EDC controller unit, using special magnetic solenoids that are built directly into the nozzles. Their activation is derived from the control unit.

That is, with the most initial turns of the crankshaft in the engine, the fuel is injected into the system of a common ramp, where it is under rather high pressure. From now on, it is always ready for injection. The peculiarities of the subsequent work of the nozzle system and the entire mechanism as a whole, depend on the driver's actions, which is calculated and is implemented using the electronic control unit.

The processes of injection and pressure support, as well as the injection itself are completely separated, the injection can be done both both two-phase and multiphase (up to 9 phases), depending on the nature of the vehicle mode of operation at the moment, load or speed.

The advantages of using Common Rail systems on all modern cars can be called, first of all, the opportunity to meet the framework of strict requirements in terms of the engineering and environmental purity of the engine, which are steadily rising every year.

In addition to reducing the amount of emissions, the system also helps to achieve significant savings, by means of a thinner fuel sprayed. This allows you to simultaneously reduce the amount of harmful emissions and noise level, as well as increase the savings and engine power, due to more efficient almost complete combustion of fuel. Using high and constant pressure, in the injection process, it is also possible to achieve accurate dosing, without any pressure waves.

CRDI system, due to its stability in terms of support for the constant high pressure in the fuel line, eliminates the "wave" pressure jumps that previously led to the destruction of fuel pipelines. Due to this, the pressure can be increased now at times (up to 2,000 bar), and at the same time all work occurring inside the nozzle will not have a devastating effect.

Among the CRDI minuses, the CRDI system can be noted several increased requirements for the purity and quality of diesel fuel. Due to the high accuracy of the system elements, as well as constant high pressure, even the smallest foreign particles will be able to derive the components of the system.

"Kia-Sportidge-2,0crdi-at-premium", from 1 379 900 rubles, car from 12.80 rubles / km

As I recently explained to me an instructor on horseback riding, the main purpose of purebred horses is racing. Because of his explosive, excessive energetic, they are not suitable for ordinary lovers. This four-legged aristocrats need a daily discharge of gallop and the hand of the master, otherwise the consequences may be unpredictable. After all, even the heart is more and more powerful than the horses of other breeds, the volume of lungs is more.

For some reason, these information was flooded in memory, when I found myself driving a 184-strong "sporty". The calm rhythm of the weekly road movement, the average speed of which does not exceed 50 km / h, it is definitely not like that. My purebred horse even started in a slide so that only hold on, and instantly reacted to any press of the accelerator pedal, immediately rummaged to overtake the starting attacks that were suddenly slow. He did it so rising and playfully that it was almost impossible to calm the purker.

Adjustment of height and the lumbar support will help the driver to choose a comfortable landing

However, it is not surprising. Aluminum diesel "Four" of the R series, which "sports" (and his cousin IX35) received in 2009, - the pride of the Kia engineers and Hyunde. Equipped with a turbine with an intermediate cooler of the upgrade air and the injection system "Common Rail" of the third generation from the company "Bosch", in its very relaxing version it issues 136 forces. But the variable geometry of the turbine blades allowed to increase the capacity of 48 liters. with., And torque at 63 N.M. If we consider that the mass of the 184th-strong car did not increase any gram, it is clear where such impressive vigor appeared in the nature of such "sports".

True, at good speeds in the car, the noise of the wheels and sounds from the car traveling nearby are well audio. And the crossover suspension is rather tough. Cracks and small potholes in the asphalt do not interfere, but on more serious obstacles "Sportyge" begins to melting significantly, and the fifth point feels well feeling the road seams and pits. But all maneuvers on the road is my all-wheel drive "KIA" performed easily and easily.

18-inch discs are very "sports". However, on our roads smaller in. The wheels, perhaps, should be recognized much more practical

Just do not wait from such a frisky hoping of special efficiency. And in any case, wonderful six with a small liter on a hundred, which they promise official characteristics. My "sports", equipped with, by the way, to all that can be placed in the car, and even with a full power of the heater, an average of at least 10-11 liters eaten. After all, such a powerful and fast car, I want to drive, so begins my purebred stallion whipping "diesel" buckets. As not to remember that the Arab horses in the stables of Sheikhs are fed by Saint, which is carrying aircraft from Canada. So that…

Here is a diesel "sports", which flows to hundreds in 9.8 seconds, is prepared exclusively to those who do not want to accept the calm character of his younger diesel brother and disagree on a gasoline horse. This stallion for those who need the fastest and frisky option from all existing ones. At the same time, the buyer has no choice: if he wants a smart diesel, then a premium set of several dozen fitness and not particular options with full-wheel drive and "automatic" is obliged to acquire, posing for it 1,379,900 rubles. And the brother of our purebred hoping is such a complete set and is not at all, the ceiling of 136-strong "sports" is the version of "Laksheri". She has no panoramic roof, leather cabin and auto parker, and instead of 18-inch discs installed on an inch of smaller diameter.

We decided:

The most powerful diesel "sports" will delight the owner with impressive exhaust and practically comprehensive equipment. True, it will have to pay for it to pay the ruble: it is 80 thousand more than the richly equipped gasoline and 130 thousand less than a powerful diesel fellow.

Unlike the rest of the world, where the "sports" has seven different motors, in Russia the buyers are not so large in Russia - only three engines. The most powerful "sports" by 2.3 seconds faster than his junior diesel brother and wins almost a second from a gasoline version with mechanics. And good horses, a famous deal, always in price ...

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.